[PATCH 00/11] Some fixes and bunch of object_id conversions

[PATCH 00/11] Some fixes and bunch of object_id conversions

[Patryk Obara]

This patch series puts some mundane groundwork for experimentation with a new
hashing algorithm in git-hash-object.

Some time has passed since my last patches, and  I see, that work on new
hashing algorithm progressed nicely since then:

* brian m. carlson implemented vtable for hash algorithm selection and pushed
the repository format front - thanks to him it's now quite easy to
experimentally replace hashing functions and, e.g. do some performance testing.

* _a lot of people_ contributed to the transition plan, and now it's available
in text format in Documentation dir - Thank you all! It's much more readable
this way.

Patch 1 is not directly related to object_id conversions but helped with
debugging t5540, which kept failing on master for me (spoiler: it was Fedora
fault).  It helps with debugging of failing git-push over HTTP in case of
internal server error, so I think it might be worthwhile.

Patch 2 is a small adjustment to .clang-format, which prevents unnecessary
line breaks after function return type.

Patch 6 is a tiny fix in oidclr function.

All other patches are progressive conversions to struct object_id with some
formatting fixes sprinkled in. These should be somewhat uncontroversial, I hope.

Patryk Obara (11):
  http-push: improve error log
  clang-format: adjust penalty for return type line break
  sha1_file: convert pretend_sha1_file to object_id
  dir: convert struct sha1_stat to use object_id
  sha1_file: convert hash_sha1_file to object_id
  cache: clear whole hash buffer with oidclr
  match-trees: convert splice_tree to object_id
  commit: convert commit_tree* to object_id
  notes: convert combine_notes_* to object_id
  notes: convert write_notes_tree to object_id
  sha1_file: convert write_sha1_file to object_id

 .clang-format                        |  2 +-
 apply.c                              | 12 +++----
 blame.c                              |  2 +-
 builtin/am.c                         |  4 +--
 builtin/checkout.c                   |  3 +-
 builtin/commit-tree.c                |  4 +--
 builtin/commit.c                     |  5 +--
 builtin/index-pack.c                 |  3 +-
 builtin/merge.c                      |  8 ++---
 builtin/mktag.c                      |  6 ++--
 builtin/mktree.c                     | 10 +++---
 builtin/notes.c                      |  8 ++---
 builtin/receive-pack.c               | 11 ++++---
 builtin/replace.c                    |  4 +--
 builtin/tag.c                        |  2 +-
 builtin/unpack-objects.c             | 11 ++++---
 cache-tree.c                         | 13 ++++----
 cache.h                              | 13 ++++----
 commit.c                             | 13 ++++----
 commit.h                             | 11 ++++---
 convert.c                            |  6 ++--
 diffcore-rename.c                    |  2 +-
 dir.c                                | 31 +++++++++---------
 dir.h                                |  2 +-
 http-push.c                          |  4 +++
 log-tree.c                           |  2 +-
 match-trees.c                        | 40 +++++++++++------------
 merge-recursive.c                    |  5 +--
 notes-cache.c                        |  8 ++---
 notes-merge.c                        |  9 +++---
 notes-utils.c                        |  9 +++---
 notes-utils.h                        |  3 +-
 notes.c                              | 63 ++++++++++++++++++------------------
 notes.h                              | 29 ++++++++++-------
 read-cache.c                         |  6 ++--
 sha1_file.c                          | 51 +++++++++++++++--------------
 t/helper/test-dump-untracked-cache.c |  4 +--
 37 files changed, 217 insertions(+), 202 deletions(-)

-- 
2.14.3

[PATCH 01/11] http-push: improve error log

[Patryk Obara]

When git push fails due to server-side WebDAV error, it's not easy to
point to the main culprit.  Additional information about exact cURL
error and HTTP server response is helpful for debugging purpose.

New error log helped me pinpoint failing test t5540-http-push-webdav
to a missing Apache dependency in Fedora 27:
https://bugzilla.redhat.com/show_bug.cgi?id=1491151

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 http-push.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/http-push.c b/http-push.c
index 14435ab65d..0913f8ab86 100644
--- a/http-push.c
+++ b/http-push.c
@@ -915,6 +915,10 @@ static struct remote_lock *lock_remote(const char *path, long timeout)
 				lock->timeout = -1;
 			}
 			XML_ParserFree(parser);
+		} else {
+			fprintf(stderr,
+				"error: curl result=%d, HTTP code=%ld\n",
+				results.curl_result, results.http_code);
 		}
 	} else {
 		fprintf(stderr, "Unable to start LOCK request\n");
-- 
2.14.3

[PATCH 02/11] clang-format: adjust penalty for return type line break

[Patryk Obara]

The penalty of 5 makes clang-format very eager to put even short type
declarations (e.g. "extern int") into a separate line, even when
breaking parameters list is sufficient.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 .clang-format | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.clang-format b/.clang-format
index 611ab4750b..12a89f95f9 100644
--- a/.clang-format
+++ b/.clang-format
@@ -163,7 +163,7 @@ PenaltyBreakComment: 10
 PenaltyBreakFirstLessLess: 0
 PenaltyBreakString: 10
 PenaltyExcessCharacter: 100
-PenaltyReturnTypeOnItsOwnLine: 5
+PenaltyReturnTypeOnItsOwnLine: 60
 
 # Don't sort #include's
 SortIncludes: false
-- 
2.14.3

[PATCH 03/11] sha1_file: convert pretend_sha1_file to object_id

[Patryk Obara]

Convert the declaration and definition of pretend_sha1_file to use
struct object_id and adjust all usages of this function.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 blame.c     | 2 +-
 cache.h     | 3 ++-
 sha1_file.c | 8 ++++----
 3 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/blame.c b/blame.c
index 2893f3c103..2ad656c1be 100644
--- a/blame.c
+++ b/blame.c
@@ -232,7 +232,7 @@ static struct commit *fake_working_tree_commit(struct diff_options *opt,
 	convert_to_git(&the_index, path, buf.buf, buf.len, &buf, 0);
 	origin->file.ptr = buf.buf;
 	origin->file.size = buf.len;
-	pretend_sha1_file(buf.buf, buf.len, OBJ_BLOB, origin->blob_oid.hash);
+	pretend_sha1_file(buf.buf, buf.len, OBJ_BLOB, &origin->blob_oid);
 
 	/*
 	 * Read the current index, replace the path entry with
diff --git a/cache.h b/cache.h
index d8b975a571..8ed75d7260 100644
--- a/cache.h
+++ b/cache.h
@@ -1241,7 +1241,8 @@ extern int sha1_object_info(const unsigned char *, unsigned long *);
 extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
 extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
 extern int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type, struct object_id *oid, unsigned flags);
-extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
+extern int pretend_sha1_file(void *, unsigned long, enum object_type,
+			     struct object_id *oid);
 extern int force_object_loose(const unsigned char *sha1, time_t mtime);
 extern int git_open_cloexec(const char *name, int flags);
 #define git_open(name) git_open_cloexec(name, O_RDONLY)
diff --git a/sha1_file.c b/sha1_file.c
index 3da70ac650..dc8adb9d17 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1313,12 +1313,12 @@ static void *read_object(const unsigned char *sha1, enum object_type *type,
 }
 
 int pretend_sha1_file(void *buf, unsigned long len, enum object_type type,
-		      unsigned char *sha1)
+		      struct object_id *oid)
 {
 	struct cached_object *co;
 
-	hash_sha1_file(buf, len, typename(type), sha1);
-	if (has_sha1_file(sha1) || find_cached_object(sha1))
+	hash_sha1_file(buf, len, typename(type), oid->hash);
+	if (has_sha1_file(oid->hash) || find_cached_object(oid->hash))
 		return 0;
 	ALLOC_GROW(cached_objects, cached_object_nr + 1, cached_object_alloc);
 	co = &cached_objects[cached_object_nr++];
@@ -1326,7 +1326,7 @@ int pretend_sha1_file(void *buf, unsigned long len, enum object_type type,
 	co->type = type;
 	co->buf = xmalloc(len);
 	memcpy(co->buf, buf, len);
-	hashcpy(co->sha1, sha1);
+	hashcpy(co->sha1, oid->hash);
 	return 0;
 }
 
-- 
2.14.3

[PATCH 04/11] dir: convert struct sha1_stat to use object_id

[Patryk Obara]

Convert the declaration of struct sha1_stat. Adjust all usages of this
struct and replace hash{clr,cmp,cpy} with oid{clr,cmp,cpy} wherever
possible.

Remove macro EMPTY_BLOB_SHA1_BIN, as it's no longer used.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 cache.h                              |  2 --
 dir.c                                | 31 ++++++++++++++++---------------
 dir.h                                |  2 +-
 t/helper/test-dump-untracked-cache.c |  4 ++--
 4 files changed, 19 insertions(+), 20 deletions(-)

diff --git a/cache.h b/cache.h
index 8ed75d7260..04af1d69e4 100644
--- a/cache.h
+++ b/cache.h
@@ -1047,8 +1047,6 @@ extern const struct object_id empty_tree_oid;
 	"\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \
 	"\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91"
 extern const struct object_id empty_blob_oid;
-#define EMPTY_BLOB_SHA1_BIN (empty_blob_oid.hash)
-
 
 static inline int is_empty_blob_sha1(const unsigned char *sha1)
 {
diff --git a/dir.c b/dir.c
index 7c4b45e30e..effa531d35 100644
--- a/dir.c
+++ b/dir.c
@@ -253,7 +253,7 @@ static int do_read_blob(const struct object_id *oid,
 
 	if (sha1_stat) {
 		memset(&sha1_stat->stat, 0, sizeof(sha1_stat->stat));
-		hashcpy(sha1_stat->sha1, oid->hash);
+		oidcpy(&sha1_stat->oid, oid);
 	}
 
 	if (sz == 0) {
@@ -823,7 +823,7 @@ static int add_excludes(const char *fname, const char *base, int baselen,
 		if (size == 0) {
 			if (sha1_stat) {
 				fill_stat_data(&sha1_stat->stat, &st);
-				hashcpy(sha1_stat->sha1, EMPTY_BLOB_SHA1_BIN);
+				oidcpy(&sha1_stat->oid, &empty_blob_oid);
 				sha1_stat->valid = 1;
 			}
 			close(fd);
@@ -847,10 +847,11 @@ static int add_excludes(const char *fname, const char *base, int baselen,
 				 !ce_stage(istate->cache[pos]) &&
 				 ce_uptodate(istate->cache[pos]) &&
 				 !would_convert_to_git(istate, fname))
-				hashcpy(sha1_stat->sha1,
-					istate->cache[pos]->oid.hash);
+				oidcpy(&sha1_stat->oid,
+				       &istate->cache[pos]->oid);
 			else
-				hash_sha1_file(buf, size, "blob", sha1_stat->sha1);
+				hash_sha1_file(buf, size, "blob",
+					       sha1_stat->oid.hash);
 			fill_stat_data(&sha1_stat->stat, &st);
 			sha1_stat->valid = 1;
 		}
@@ -1223,7 +1224,7 @@ static void prep_exclude(struct dir_struct *dir,
 		}
 
 		/* Try to read per-directory file */
-		hashclr(sha1_stat.sha1);
+		oidclr(&sha1_stat.oid);
 		sha1_stat.valid = 0;
 		if (dir->exclude_per_dir &&
 		    /*
@@ -1269,9 +1270,9 @@ static void prep_exclude(struct dir_struct *dir,
 		 * order, though, if you do that.
 		 */
 		if (untracked &&
-		    hashcmp(sha1_stat.sha1, untracked->exclude_sha1)) {
+		    hashcmp(sha1_stat.oid.hash, untracked->exclude_sha1)) {
 			invalidate_gitignore(dir->untracked, untracked);
-			hashcpy(untracked->exclude_sha1, sha1_stat.sha1);
+			hashcpy(untracked->exclude_sha1, sha1_stat.oid.hash);
 		}
 		dir->exclude_stack = stk;
 		current = stk->baselen;
@@ -2228,13 +2229,13 @@ static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *d
 
 	/* Validate $GIT_DIR/info/exclude and core.excludesfile */
 	root = dir->untracked->root;
-	if (hashcmp(dir->ss_info_exclude.sha1,
-		    dir->untracked->ss_info_exclude.sha1)) {
+	if (oidcmp(&dir->ss_info_exclude.oid,
+		   &dir->untracked->ss_info_exclude.oid)) {
 		invalidate_gitignore(dir->untracked, root);
 		dir->untracked->ss_info_exclude = dir->ss_info_exclude;
 	}
-	if (hashcmp(dir->ss_excludes_file.sha1,
-		    dir->untracked->ss_excludes_file.sha1)) {
+	if (oidcmp(&dir->ss_excludes_file.oid,
+		   &dir->untracked->ss_excludes_file.oid)) {
 		invalidate_gitignore(dir->untracked, root);
 		dir->untracked->ss_excludes_file = dir->ss_excludes_file;
 	}
@@ -2638,8 +2639,8 @@ void write_untracked_extension(struct strbuf *out, struct untracked_cache *untra
 	FLEX_ALLOC_MEM(ouc, exclude_per_dir, untracked->exclude_per_dir, len);
 	stat_data_to_disk(&ouc->info_exclude_stat, &untracked->ss_info_exclude.stat);
 	stat_data_to_disk(&ouc->excludes_file_stat, &untracked->ss_excludes_file.stat);
-	hashcpy(ouc->info_exclude_sha1, untracked->ss_info_exclude.sha1);
-	hashcpy(ouc->excludes_file_sha1, untracked->ss_excludes_file.sha1);
+	hashcpy(ouc->info_exclude_sha1, untracked->ss_info_exclude.oid.hash);
+	hashcpy(ouc->excludes_file_sha1, untracked->ss_excludes_file.oid.hash);
 	ouc->dir_flags = htonl(untracked->dir_flags);
 
 	varint_len = encode_varint(untracked->ident.len, varbuf);
@@ -2821,7 +2822,7 @@ static void load_sha1_stat(struct sha1_stat *sha1_stat,
 			   const unsigned char *sha1)
 {
 	stat_data_from_disk(&sha1_stat->stat, data);
-	hashcpy(sha1_stat->sha1, sha1);
+	hashcpy(sha1_stat->oid.hash, sha1);
 	sha1_stat->valid = 1;
 }
 
diff --git a/dir.h b/dir.h
index 11a047ba48..afbff73357 100644
--- a/dir.h
+++ b/dir.h
@@ -76,7 +76,7 @@ struct exclude_list_group {
 
 struct sha1_stat {
 	struct stat_data stat;
-	unsigned char sha1[20];
+	struct object_id oid;
 	int valid;
 };
 
diff --git a/t/helper/test-dump-untracked-cache.c b/t/helper/test-dump-untracked-cache.c
index f752532ffb..d7c55c2355 100644
--- a/t/helper/test-dump-untracked-cache.c
+++ b/t/helper/test-dump-untracked-cache.c
@@ -54,8 +54,8 @@ int cmd_main(int ac, const char **av)
 		printf("no untracked cache\n");
 		return 0;
 	}
-	printf("info/exclude %s\n", sha1_to_hex(uc->ss_info_exclude.sha1));
-	printf("core.excludesfile %s\n", sha1_to_hex(uc->ss_excludes_file.sha1));
+	printf("info/exclude %s\n", oid_to_hex(&uc->ss_info_exclude.oid));
+	printf("core.excludesfile %s\n", oid_to_hex(&uc->ss_excludes_file.oid));
 	printf("exclude_per_dir %s\n", uc->exclude_per_dir);
 	printf("flags %08x\n", uc->dir_flags);
 	if (uc->root)
-- 
2.14.3

[PATCH 05/11] sha1_file: convert hash_sha1_file to object_id

[Patryk Obara]

Convert the declaration and definition of hash_sha1_file to use
struct object_id and adjust all function calls.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 apply.c                  |  4 ++--
 builtin/index-pack.c     |  3 +--
 builtin/replace.c        |  2 +-
 builtin/unpack-objects.c |  2 +-
 cache-tree.c             | 11 +++++------
 cache.h                  |  3 ++-
 convert.c                |  6 +++---
 diffcore-rename.c        |  2 +-
 dir.c                    |  2 +-
 log-tree.c               |  2 +-
 sha1_file.c              | 22 +++++++++++-----------
 11 files changed, 29 insertions(+), 30 deletions(-)

diff --git a/apply.c b/apply.c
index 321a9fa68d..d6cbb4dc66 100644
--- a/apply.c
+++ b/apply.c
@@ -3154,7 +3154,7 @@ static int apply_binary(struct apply_state *state,
 		 * See if the old one matches what the patch
 		 * applies to.
 		 */
-		hash_sha1_file(img->buf, img->len, blob_type, oid.hash);
+		hash_sha1_file(img->buf, img->len, blob_type, &oid);
 		if (strcmp(oid_to_hex(&oid), patch->old_sha1_prefix))
 			return error(_("the patch applies to '%s' (%s), "
 				       "which does not match the "
@@ -3199,7 +3199,7 @@ static int apply_binary(struct apply_state *state,
 				     name);
 
 		/* verify that the result matches */
-		hash_sha1_file(img->buf, img->len, blob_type, oid.hash);
+		hash_sha1_file(img->buf, img->len, blob_type, &oid);
 		if (strcmp(oid_to_hex(&oid), patch->new_sha1_prefix))
 			return error(_("binary patch to '%s' creates incorrect result (expecting %s, got %s)"),
 				name, patch->new_sha1_prefix, oid_to_hex(&oid));
diff --git a/builtin/index-pack.c b/builtin/index-pack.c
index 4c51aec81f..f7c69008f1 100644
--- a/builtin/index-pack.c
+++ b/builtin/index-pack.c
@@ -959,8 +959,7 @@ static void resolve_delta(struct object_entry *delta_obj,
 	if (!result->data)
 		bad_object(delta_obj->idx.offset, _("failed to apply delta"));
 	hash_sha1_file(result->data, result->size,
-		       typename(delta_obj->real_type),
-		       delta_obj->idx.oid.hash);
+		       typename(delta_obj->real_type), &delta_obj->idx.oid);
 	sha1_object(result->data, NULL, result->size, delta_obj->real_type,
 		    &delta_obj->idx.oid);
 	counter_lock();
diff --git a/builtin/replace.c b/builtin/replace.c
index 10078ae371..7267d06b17 100644
--- a/builtin/replace.c
+++ b/builtin/replace.c
@@ -355,7 +355,7 @@ static void check_one_mergetag(struct commit *commit,
 	struct tag *tag;
 	int i;
 
-	hash_sha1_file(extra->value, extra->len, typename(OBJ_TAG), tag_oid.hash);
+	hash_sha1_file(extra->value, extra->len, typename(OBJ_TAG), &tag_oid);
 	tag = lookup_tag(&tag_oid);
 	if (!tag)
 		die(_("bad mergetag in commit '%s'"), ref);
diff --git a/builtin/unpack-objects.c b/builtin/unpack-objects.c
index 62ea264c46..2e494e2a4b 100644
--- a/builtin/unpack-objects.c
+++ b/builtin/unpack-objects.c
@@ -258,7 +258,7 @@ static void write_object(unsigned nr, enum object_type type,
 	} else {
 		struct object *obj;
 		int eaten;
-		hash_sha1_file(buf, size, typename(type), obj_list[nr].oid.hash);
+		hash_sha1_file(buf, size, typename(type), &obj_list[nr].oid);
 		added_object(nr, type, buf, size);
 		obj = parse_object_buffer(&obj_list[nr].oid, type, size, buf,
 					  &eaten);
diff --git a/cache-tree.c b/cache-tree.c
index e03e72c34a..0df09180ee 100644
--- a/cache-tree.c
+++ b/cache-tree.c
@@ -400,15 +400,14 @@ static int update_one(struct cache_tree *it,
 	}
 
 	if (repair) {
-		unsigned char sha1[20];
-		hash_sha1_file(buffer.buf, buffer.len, tree_type, sha1);
-		if (has_sha1_file(sha1))
-			hashcpy(it->oid.hash, sha1);
+		struct object_id oid;
+		hash_sha1_file(buffer.buf, buffer.len, tree_type, &oid);
+		if (has_sha1_file(oid.hash))
+			oidcpy(&it->oid, &oid);
 		else
 			to_invalidate = 1;
 	} else if (dryrun)
-		hash_sha1_file(buffer.buf, buffer.len, tree_type,
-			       it->oid.hash);
+		hash_sha1_file(buffer.buf, buffer.len, tree_type, &it->oid);
 	else if (write_sha1_file(buffer.buf, buffer.len, tree_type, it->oid.hash)) {
 		strbuf_release(&buffer);
 		return -1;
diff --git a/cache.h b/cache.h
index 04af1d69e4..b953d9f82c 100644
--- a/cache.h
+++ b/cache.h
@@ -1236,7 +1236,8 @@ static inline const unsigned char *lookup_replace_object(const unsigned char *sh
 
 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
 extern int sha1_object_info(const unsigned char *, unsigned long *);
-extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
+extern int hash_sha1_file(const void *buf, unsigned long len, const char *type,
+			  struct object_id *oid);
 extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
 extern int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type, struct object_id *oid, unsigned flags);
 extern int pretend_sha1_file(void *, unsigned long, enum object_type,
diff --git a/convert.c b/convert.c
index 1a41a48e15..999bcb1336 100644
--- a/convert.c
+++ b/convert.c
@@ -898,7 +898,7 @@ static int ident_to_git(const char *path, const char *src, size_t len,
 static int ident_to_worktree(const char *path, const char *src, size_t len,
                              struct strbuf *buf, int ident)
 {
-	unsigned char sha1[20];
+	struct object_id oid;
 	char *to_free = NULL, *dollar, *spc;
 	int cnt;
 
@@ -912,7 +912,7 @@ static int ident_to_worktree(const char *path, const char *src, size_t len,
 	/* are we "faking" in place editing ? */
 	if (src == buf->buf)
 		to_free = strbuf_detach(buf, NULL);
-	hash_sha1_file(src, len, "blob", sha1);
+	hash_sha1_file(src, len, "blob", &oid);
 
 	strbuf_grow(buf, len + cnt * 43);
 	for (;;) {
@@ -969,7 +969,7 @@ static int ident_to_worktree(const char *path, const char *src, size_t len,
 
 		/* step 4: substitute */
 		strbuf_addstr(buf, "Id: ");
-		strbuf_add(buf, sha1_to_hex(sha1), 40);
+		strbuf_add(buf, sha1_to_hex(oid.hash), GIT_SHA1_HEXSZ);
 		strbuf_addstr(buf, " $");
 	}
 	strbuf_add(buf, src, len);
diff --git a/diffcore-rename.c b/diffcore-rename.c
index 245e999fe5..93cbcb9de4 100644
--- a/diffcore-rename.c
+++ b/diffcore-rename.c
@@ -261,7 +261,7 @@ static unsigned int hash_filespec(struct diff_filespec *filespec)
 		if (diff_populate_filespec(filespec, 0))
 			return 0;
 		hash_sha1_file(filespec->data, filespec->size, "blob",
-			       filespec->oid.hash);
+			       &filespec->oid);
 	}
 	return sha1hash(filespec->oid.hash);
 }
diff --git a/dir.c b/dir.c
index effa531d35..a3454d6cd0 100644
--- a/dir.c
+++ b/dir.c
@@ -851,7 +851,7 @@ static int add_excludes(const char *fname, const char *base, int baselen,
 				       &istate->cache[pos]->oid);
 			else
 				hash_sha1_file(buf, size, "blob",
-					       sha1_stat->oid.hash);
+					       &sha1_stat->oid);
 			fill_stat_data(&sha1_stat->stat, &st);
 			sha1_stat->valid = 1;
 		}
diff --git a/log-tree.c b/log-tree.c
index fca29d4799..019026e1ae 100644
--- a/log-tree.c
+++ b/log-tree.c
@@ -499,7 +499,7 @@ static void show_one_mergetag(struct commit *commit,
 	int status, nth;
 	size_t payload_size, gpg_message_offset;
 
-	hash_sha1_file(extra->value, extra->len, typename(OBJ_TAG), oid.hash);
+	hash_sha1_file(extra->value, extra->len, typename(OBJ_TAG), &oid);
 	tag = lookup_tag(&oid);
 	if (!tag)
 		return; /* error message already given */
diff --git a/sha1_file.c b/sha1_file.c
index dc8adb9d17..88b960316c 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -788,7 +788,7 @@ void *xmmap(void *start, size_t length,
 int check_sha1_signature(const unsigned char *sha1, void *map,
 			 unsigned long size, const char *type)
 {
-	unsigned char real_sha1[20];
+	struct object_id real_oid;
 	enum object_type obj_type;
 	struct git_istream *st;
 	git_SHA_CTX c;
@@ -796,8 +796,8 @@ int check_sha1_signature(const unsigned char *sha1, void *map,
 	int hdrlen;
 
 	if (map) {
-		hash_sha1_file(map, size, type, real_sha1);
-		return hashcmp(sha1, real_sha1) ? -1 : 0;
+		hash_sha1_file(map, size, type, &real_oid);
+		return hashcmp(sha1, real_oid.hash) ? -1 : 0;
 	}
 
 	st = open_istream(sha1, &obj_type, &size, NULL);
@@ -822,9 +822,9 @@ int check_sha1_signature(const unsigned char *sha1, void *map,
 			break;
 		git_SHA1_Update(&c, buf, readlen);
 	}
-	git_SHA1_Final(real_sha1, &c);
+	git_SHA1_Final(real_oid.hash, &c);
 	close_istream(st);
-	return hashcmp(sha1, real_sha1) ? -1 : 0;
+	return hashcmp(sha1, real_oid.hash) ? -1 : 0;
 }
 
 int git_open_cloexec(const char *name, int flags)
@@ -1317,7 +1317,7 @@ int pretend_sha1_file(void *buf, unsigned long len, enum object_type type,
 {
 	struct cached_object *co;
 
-	hash_sha1_file(buf, len, typename(type), oid->hash);
+	hash_sha1_file(buf, len, typename(type), oid);
 	if (has_sha1_file(oid->hash) || find_cached_object(oid->hash))
 		return 0;
 	ALLOC_GROW(cached_objects, cached_object_nr + 1, cached_object_alloc);
@@ -1486,11 +1486,11 @@ static int write_buffer(int fd, const void *buf, size_t len)
 }
 
 int hash_sha1_file(const void *buf, unsigned long len, const char *type,
-                   unsigned char *sha1)
+		   struct object_id *oid)
 {
 	char hdr[32];
 	int hdrlen = sizeof(hdr);
-	write_sha1_file_prepare(buf, len, type, sha1, hdr, &hdrlen);
+	write_sha1_file_prepare(buf, len, type, oid->hash, hdr, &hdrlen);
 	return 0;
 }
 
@@ -1769,7 +1769,7 @@ static int index_mem(struct object_id *oid, void *buf, size_t size,
 	if (write_object)
 		ret = write_sha1_file(buf, size, typename(type), oid->hash);
 	else
-		ret = hash_sha1_file(buf, size, typename(type), oid->hash);
+		ret = hash_sha1_file(buf, size, typename(type), oid);
 	if (re_allocated)
 		free(buf);
 	return ret;
@@ -1793,7 +1793,7 @@ static int index_stream_convert_blob(struct object_id *oid, int fd,
 				      oid->hash);
 	else
 		ret = hash_sha1_file(sbuf.buf, sbuf.len, typename(OBJ_BLOB),
-				     oid->hash);
+				     oid);
 	strbuf_release(&sbuf);
 	return ret;
 }
@@ -1907,7 +1907,7 @@ int index_path(struct object_id *oid, const char *path, struct stat *st, unsigne
 		if (strbuf_readlink(&sb, path, st->st_size))
 			return error_errno("readlink(\"%s\")", path);
 		if (!(flags & HASH_WRITE_OBJECT))
-			hash_sha1_file(sb.buf, sb.len, blob_type, oid->hash);
+			hash_sha1_file(sb.buf, sb.len, blob_type, oid);
 		else if (write_sha1_file(sb.buf, sb.len, blob_type, oid->hash))
 			rc = error("%s: failed to insert into database", path);
 		strbuf_release(&sb);
-- 
2.14.3

[PATCH 06/11] cache: clear whole hash buffer with oidclr

[Patryk Obara]

As long as GIT_SHA1_RAWSZ is equal to GIT_MAX_RAWSZ there's no problem,
but when new hashing algorithm will be in place this memset will clear
only 20-byte prefix of hash buffer.

Alternatively, hashclr implementation could be adjusted, but this
function is almost removed from codebase already.  Separate
implementation of oidclr prevents potential buffer overrun in case
someone incorrectly used hashclr on object_id in future.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 cache.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cache.h b/cache.h
index b953d9f82c..cf98573805 100644
--- a/cache.h
+++ b/cache.h
@@ -1029,7 +1029,7 @@ static inline void hashclr(unsigned char *hash)
 
 static inline void oidclr(struct object_id *oid)
 {
-	hashclr(oid->hash);
+	memset(oid->hash, 0, GIT_MAX_RAWSZ);
 }
 
 
-- 
2.14.3

[PATCH 07/11] match-trees: convert splice_tree to object_id

[Patryk Obara]

Convert the definition of static recursive splice_tree function to use
struct object_id and adjust single caller.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 match-trees.c | 42 ++++++++++++++++++++----------------------
 1 file changed, 20 insertions(+), 22 deletions(-)

diff --git a/match-trees.c b/match-trees.c
index 396b7338df..0f899a7212 100644
--- a/match-trees.c
+++ b/match-trees.c
@@ -161,19 +161,17 @@ static void match_trees(const struct object_id *hash1,
  * A tree "hash1" has a subdirectory at "prefix".  Come up with a
  * tree object by replacing it with another tree "hash2".
  */
-static int splice_tree(const unsigned char *hash1,
-		       const char *prefix,
-		       const unsigned char *hash2,
-		       unsigned char *result)
+static int splice_tree(const struct object_id *hash1, const char *prefix,
+		       const struct object_id *hash2, struct object_id *result)
 {
 	char *subpath;
 	int toplen;
 	char *buf;
 	unsigned long sz;
 	struct tree_desc desc;
-	unsigned char *rewrite_here;
-	const unsigned char *rewrite_with;
-	unsigned char subtree[20];
+	struct object_id *rewrite_here;
+	const struct object_id *rewrite_with;
+	struct object_id subtree;
 	enum object_type type;
 	int status;
 
@@ -182,9 +180,9 @@ static int splice_tree(const unsigned char *hash1,
 	if (*subpath)
 		subpath++;
 
-	buf = read_sha1_file(hash1, &type, &sz);
+	buf = read_sha1_file(hash1->hash, &type, &sz);
 	if (!buf)
-		die("cannot read tree %s", sha1_to_hex(hash1));
+		die("cannot read tree %s", oid_to_hex(hash1));
 	init_tree_desc(&desc, buf, sz);
 
 	rewrite_here = NULL;
@@ -197,26 +195,26 @@ static int splice_tree(const unsigned char *hash1,
 		if (strlen(name) == toplen &&
 		    !memcmp(name, prefix, toplen)) {
 			if (!S_ISDIR(mode))
-				die("entry %s in tree %s is not a tree",
-				    name, sha1_to_hex(hash1));
-			rewrite_here = (unsigned char *) oid->hash;
+				die("entry %s in tree %s is not a tree", name,
+				    oid_to_hex(hash1));
+			rewrite_here = (struct object_id *)oid;
 			break;
 		}
 		update_tree_entry(&desc);
 	}
 	if (!rewrite_here)
-		die("entry %.*s not found in tree %s",
-		    toplen, prefix, sha1_to_hex(hash1));
+		die("entry %.*s not found in tree %s", toplen, prefix,
+		    oid_to_hex(hash1));
 	if (*subpath) {
-		status = splice_tree(rewrite_here, subpath, hash2, subtree);
+		status = splice_tree(rewrite_here, subpath, hash2, &subtree);
 		if (status)
 			return status;
-		rewrite_with = subtree;
-	}
-	else
+		rewrite_with = &subtree;
+	} else {
 		rewrite_with = hash2;
-	hashcpy(rewrite_here, rewrite_with);
-	status = write_sha1_file(buf, sz, tree_type, result);
+	}
+	oidcpy(rewrite_here, rewrite_with);
+	status = write_sha1_file(buf, sz, tree_type, result->hash);
 	free(buf);
 	return status;
 }
@@ -280,7 +278,7 @@ void shift_tree(const struct object_id *hash1,
 	if (!*add_prefix)
 		return;
 
-	splice_tree(hash1->hash, add_prefix, hash2->hash, shifted->hash);
+	splice_tree(hash1, add_prefix, hash2, shifted);
 }
 
 /*
@@ -334,7 +332,7 @@ void shift_tree_by(const struct object_id *hash1,
 		 * shift tree2 down by adding shift_prefix above it
 		 * to match tree1.
 		 */
-		splice_tree(hash1->hash, shift_prefix, hash2->hash, shifted->hash);
+		splice_tree(hash1, shift_prefix, hash2, shifted);
 	else
 		/*
 		 * shift tree2 up by removing shift_prefix from it
-- 
2.14.3

[PATCH 08/11] commit: convert commit_tree* to object_id

[Patryk Obara]

Convert the definitions and declarations of commit_tree and
commit_tree_extended to use struct object_id and adjust all usages of
these functions.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 builtin/am.c          |  4 ++--
 builtin/commit-tree.c |  4 ++--
 builtin/commit.c      |  5 +++--
 builtin/merge.c       |  8 ++++----
 commit.c              | 15 +++++++--------
 commit.h              | 11 ++++++-----
 notes-cache.c         |  4 ++--
 notes-merge.c         |  9 ++++-----
 notes-utils.c         |  7 ++++---
 notes-utils.h         |  3 ++-
 10 files changed, 36 insertions(+), 34 deletions(-)

diff --git a/builtin/am.c b/builtin/am.c
index acfe9d3c8c..6e6abb05cd 100644
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -1641,8 +1641,8 @@ static void do_commit(const struct am_state *state)
 		setenv("GIT_COMMITTER_DATE",
 			state->ignore_date ? "" : state->author_date, 1);
 
-	if (commit_tree(state->msg, state->msg_len, tree.hash, parents, commit.hash,
-				author, state->sign_commit))
+	if (commit_tree(state->msg, state->msg_len, &tree, parents, &commit,
+			author, state->sign_commit))
 		die(_("failed to write commit object"));
 
 	reflog_msg = getenv("GIT_REFLOG_ACTION");
diff --git a/builtin/commit-tree.c b/builtin/commit-tree.c
index 2177251e24..e5bdf57b1e 100644
--- a/builtin/commit-tree.c
+++ b/builtin/commit-tree.c
@@ -117,8 +117,8 @@ int cmd_commit_tree(int argc, const char **argv, const char *prefix)
 			die_errno("git commit-tree: failed to read");
 	}
 
-	if (commit_tree(buffer.buf, buffer.len, tree_oid.hash, parents,
-			commit_oid.hash, NULL, sign_commit)) {
+	if (commit_tree(buffer.buf, buffer.len, &tree_oid, parents, &commit_oid,
+			NULL, sign_commit)) {
 		strbuf_release(&buffer);
 		return 1;
 	}
diff --git a/builtin/commit.c b/builtin/commit.c
index 8a87701414..c14878302e 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -1792,8 +1792,9 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
 		append_merge_tag_headers(parents, &tail);
 	}
 
-	if (commit_tree_extended(sb.buf, sb.len, active_cache_tree->oid.hash,
-			 parents, oid.hash, author_ident.buf, sign_commit, extra)) {
+	if (commit_tree_extended(sb.buf, sb.len, &active_cache_tree->oid,
+				 parents, &oid, author_ident.buf, sign_commit,
+				 extra)) {
 		rollback_index_files();
 		die(_("failed to write commit object"));
 	}
diff --git a/builtin/merge.c b/builtin/merge.c
index 30264cfd7c..92ba99a1a5 100644
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -820,8 +820,8 @@ static int merge_trivial(struct commit *head, struct commit_list *remoteheads)
 	pptr = commit_list_append(head, pptr);
 	pptr = commit_list_append(remoteheads->item, pptr);
 	prepare_to_commit(remoteheads);
-	if (commit_tree(merge_msg.buf, merge_msg.len, result_tree.hash, parents,
-			result_commit.hash, NULL, sign_commit))
+	if (commit_tree(merge_msg.buf, merge_msg.len, &result_tree, parents,
+			&result_commit, NULL, sign_commit))
 		die(_("failed to write commit object"));
 	finish(head, remoteheads, &result_commit, "In-index merge");
 	drop_save();
@@ -845,8 +845,8 @@ static int finish_automerge(struct commit *head,
 		commit_list_insert(head, &parents);
 	strbuf_addch(&merge_msg, '\n');
 	prepare_to_commit(remoteheads);
-	if (commit_tree(merge_msg.buf, merge_msg.len, result_tree->hash, parents,
-			result_commit.hash, NULL, sign_commit))
+	if (commit_tree(merge_msg.buf, merge_msg.len, result_tree, parents,
+			&result_commit, NULL, sign_commit))
 		die(_("failed to write commit object"));
 	strbuf_addf(&buf, "Merge made by the '%s' strategy.", wt_strategy);
 	finish(head, remoteheads, &result_commit, buf.buf);
diff --git a/commit.c b/commit.c
index cab8d4455b..760137e54b 100644
--- a/commit.c
+++ b/commit.c
@@ -1395,9 +1395,8 @@ void free_commit_extra_headers(struct commit_extra_header *extra)
 	}
 }
 
-int commit_tree(const char *msg, size_t msg_len,
-		const unsigned char *tree,
-		struct commit_list *parents, unsigned char *ret,
+int commit_tree(const char *msg, size_t msg_len, const struct object_id *tree,
+		struct commit_list *parents, struct object_id *ret,
 		const char *author, const char *sign_commit)
 {
 	struct commit_extra_header *extra = NULL, **tail = &extra;
@@ -1526,8 +1525,8 @@ N_("Warning: commit message did not conform to UTF-8.\n"
    "variable i18n.commitencoding to the encoding your project uses.\n");
 
 int commit_tree_extended(const char *msg, size_t msg_len,
-			 const unsigned char *tree,
-			 struct commit_list *parents, unsigned char *ret,
+			 const struct object_id *tree,
+			 struct commit_list *parents, struct object_id *ret,
 			 const char *author, const char *sign_commit,
 			 struct commit_extra_header *extra)
 {
@@ -1535,7 +1534,7 @@ int commit_tree_extended(const char *msg, size_t msg_len,
 	int encoding_is_utf8;
 	struct strbuf buffer;
 
-	assert_sha1_type(tree, OBJ_TREE);
+	assert_sha1_type(tree->hash, OBJ_TREE);
 
 	if (memchr(msg, '\0', msg_len))
 		return error("a NUL byte in commit log message not allowed.");
@@ -1544,7 +1543,7 @@ int commit_tree_extended(const char *msg, size_t msg_len,
 	encoding_is_utf8 = is_encoding_utf8(git_commit_encoding);
 
 	strbuf_init(&buffer, 8192); /* should avoid reallocs for the headers */
-	strbuf_addf(&buffer, "tree %s\n", sha1_to_hex(tree));
+	strbuf_addf(&buffer, "tree %s\n", oid_to_hex(tree));
 
 	/*
 	 * NOTE! This ordering means that the same exact tree merged with a
@@ -1583,7 +1582,7 @@ int commit_tree_extended(const char *msg, size_t msg_len,
 		goto out;
 	}
 
-	result = write_sha1_file(buffer.buf, buffer.len, commit_type, ret);
+	result = write_sha1_file(buffer.buf, buffer.len, commit_type, ret->hash);
 out:
 	strbuf_release(&buffer);
 	return result;
diff --git a/commit.h b/commit.h
index 8c68ca1a5a..5dd9df4448 100644
--- a/commit.h
+++ b/commit.h
@@ -263,14 +263,15 @@ extern void append_merge_tag_headers(struct commit_list *parents,
 				     struct commit_extra_header ***tail);
 
 extern int commit_tree(const char *msg, size_t msg_len,
-		       const unsigned char *tree,
-		       struct commit_list *parents, unsigned char *ret,
+		       const struct object_id *tree,
+		       struct commit_list *parents, struct object_id *ret,
 		       const char *author, const char *sign_commit);
 
 extern int commit_tree_extended(const char *msg, size_t msg_len,
-				const unsigned char *tree,
-				struct commit_list *parents, unsigned char *ret,
-				const char *author, const char *sign_commit,
+				const struct object_id *tree,
+				struct commit_list *parents,
+				struct object_id *ret, const char *author,
+				const char *sign_commit,
 				struct commit_extra_header *);
 
 extern struct commit_extra_header *read_commit_extra_headers(struct commit *, const char **);
diff --git a/notes-cache.c b/notes-cache.c
index 17ee8602b3..d2f87147cc 100644
--- a/notes-cache.c
+++ b/notes-cache.c
@@ -56,8 +56,8 @@ int notes_cache_write(struct notes_cache *c)
 
 	if (write_notes_tree(&c->tree, tree_oid.hash))
 		return -1;
-	if (commit_tree(c->validity, strlen(c->validity), tree_oid.hash, NULL,
-			commit_oid.hash, NULL, NULL) < 0)
+	if (commit_tree(c->validity, strlen(c->validity), &tree_oid, NULL,
+			&commit_oid, NULL, NULL) < 0)
 		return -1;
 	if (update_ref("update notes cache", c->tree.update_ref, &commit_oid,
 		       NULL, 0, UPDATE_REFS_QUIET_ON_ERR) < 0)
diff --git a/notes-merge.c b/notes-merge.c
index 0f6573cb17..c09c5e0e47 100644
--- a/notes-merge.c
+++ b/notes-merge.c
@@ -642,9 +642,8 @@ int notes_merge(struct notes_merge_options *o,
 		struct commit_list *parents = NULL;
 		commit_list_insert(remote, &parents); /* LIFO order */
 		commit_list_insert(local, &parents);
-		create_notes_commit(local_tree, parents,
-				    o->commit_msg.buf, o->commit_msg.len,
-				    result_oid->hash);
+		create_notes_commit(local_tree, parents, o->commit_msg.buf,
+				    o->commit_msg.len, result_oid);
 	}
 
 found_result:
@@ -718,8 +717,8 @@ int notes_merge_commit(struct notes_merge_options *o,
 		strbuf_setlen(&path, baselen);
 	}
 
-	create_notes_commit(partial_tree, partial_commit->parents,
-			    msg, strlen(msg), result_oid->hash);
+	create_notes_commit(partial_tree, partial_commit->parents, msg,
+			    strlen(msg), result_oid);
 	unuse_commit_buffer(partial_commit, buffer);
 	if (o->verbosity >= 4)
 		printf("Finalized notes merge commit: %s\n",
diff --git a/notes-utils.c b/notes-utils.c
index 5c8e70c98f..058c642dac 100644
--- a/notes-utils.c
+++ b/notes-utils.c
@@ -6,7 +6,7 @@
 
 void create_notes_commit(struct notes_tree *t, struct commit_list *parents,
 			 const char *msg, size_t msg_len,
-			 unsigned char *result_sha1)
+			 struct object_id *result_oid)
 {
 	struct object_id tree_oid;
 
@@ -27,7 +27,8 @@ void create_notes_commit(struct notes_tree *t, struct commit_list *parents,
 		/* else: t->ref points to nothing, assume root/orphan commit */
 	}
 
-	if (commit_tree(msg, msg_len, tree_oid.hash, parents, result_sha1, NULL, NULL))
+	if (commit_tree(msg, msg_len, &tree_oid, parents, result_oid, NULL,
+			NULL))
 		die("Failed to commit notes tree to database");
 }
 
@@ -47,7 +48,7 @@ void commit_notes(struct notes_tree *t, const char *msg)
 	strbuf_addstr(&buf, msg);
 	strbuf_complete_line(&buf);
 
-	create_notes_commit(t, NULL, buf.buf, buf.len, commit_oid.hash);
+	create_notes_commit(t, NULL, buf.buf, buf.len, &commit_oid);
 	strbuf_insert(&buf, 0, "notes: ", 7); /* commit message starts at index 7 */
 	update_ref(buf.buf, t->update_ref, &commit_oid, NULL, 0,
 		   UPDATE_REFS_DIE_ON_ERR);
diff --git a/notes-utils.h b/notes-utils.h
index 1190578398..5d79cbef51 100644
--- a/notes-utils.h
+++ b/notes-utils.h
@@ -15,7 +15,8 @@
  * The resulting commit SHA1 is stored in result_sha1.
  */
 void create_notes_commit(struct notes_tree *t, struct commit_list *parents,
-			 const char *msg, size_t msg_len, unsigned char *result_sha1);
+			 const char *msg, size_t msg_len,
+			 struct object_id *result_oid);
 
 void commit_notes(struct notes_tree *t, const char *msg);
 
-- 
2.14.3

[PATCH 09/11] notes: convert combine_notes_* to object_id

[Patryk Obara]

Convert the definition and declarations of combine_notes_* functions
to struct object_id and adjust usage of these functions.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 notes.c | 46 +++++++++++++++++++++++-----------------------
 notes.h | 25 +++++++++++++++----------
 2 files changed, 38 insertions(+), 33 deletions(-)

diff --git a/notes.c b/notes.c
index c7f21fae44..3f4f94507a 100644
--- a/notes.c
+++ b/notes.c
@@ -270,8 +270,8 @@ static int note_tree_insert(struct notes_tree *t, struct int_node *tree,
 				if (!oidcmp(&l->val_oid, &entry->val_oid))
 					return 0;
 
-				ret = combine_notes(l->val_oid.hash,
-						    entry->val_oid.hash);
+				ret = combine_notes(&l->val_oid,
+						    &entry->val_oid);
 				if (!ret && is_null_oid(&l->val_oid))
 					note_tree_remove(t, tree, n, entry);
 				free(entry);
@@ -786,8 +786,8 @@ static int prune_notes_helper(const struct object_id *object_oid,
 	return 0;
 }
 
-int combine_notes_concatenate(unsigned char *cur_sha1,
-		const unsigned char *new_sha1)
+int combine_notes_concatenate(struct object_id *cur_oid,
+			      const struct object_id *new_oid)
 {
 	char *cur_msg = NULL, *new_msg = NULL, *buf;
 	unsigned long cur_len, new_len, buf_len;
@@ -795,18 +795,18 @@ int combine_notes_concatenate(unsigned char *cur_sha1,
 	int ret;
 
 	/* read in both note blob objects */
-	if (!is_null_sha1(new_sha1))
-		new_msg = read_sha1_file(new_sha1, &new_type, &new_len);
+	if (!is_null_oid(new_oid))
+		new_msg = read_sha1_file(new_oid->hash, &new_type, &new_len);
 	if (!new_msg || !new_len || new_type != OBJ_BLOB) {
 		free(new_msg);
 		return 0;
 	}
-	if (!is_null_sha1(cur_sha1))
-		cur_msg = read_sha1_file(cur_sha1, &cur_type, &cur_len);
+	if (!is_null_oid(cur_oid))
+		cur_msg = read_sha1_file(cur_oid->hash, &cur_type, &cur_len);
 	if (!cur_msg || !cur_len || cur_type != OBJ_BLOB) {
 		free(cur_msg);
 		free(new_msg);
-		hashcpy(cur_sha1, new_sha1);
+		oidcpy(cur_oid, new_oid);
 		return 0;
 	}
 
@@ -825,20 +825,20 @@ int combine_notes_concatenate(unsigned char *cur_sha1,
 	free(new_msg);
 
 	/* create a new blob object from buf */
-	ret = write_sha1_file(buf, buf_len, blob_type, cur_sha1);
+	ret = write_sha1_file(buf, buf_len, blob_type, cur_oid->hash);
 	free(buf);
 	return ret;
 }
 
-int combine_notes_overwrite(unsigned char *cur_sha1,
-		const unsigned char *new_sha1)
+int combine_notes_overwrite(struct object_id *cur_oid,
+			    const struct object_id *new_oid)
 {
-	hashcpy(cur_sha1, new_sha1);
+	oidcpy(cur_oid, new_oid);
 	return 0;
 }
 
-int combine_notes_ignore(unsigned char *cur_sha1,
-		const unsigned char *new_sha1)
+int combine_notes_ignore(struct object_id *cur_oid,
+			 const struct object_id *new_oid)
 {
 	return 0;
 }
@@ -848,17 +848,17 @@ int combine_notes_ignore(unsigned char *cur_sha1,
  * newlines removed.
  */
 static int string_list_add_note_lines(struct string_list *list,
-				      const unsigned char *sha1)
+				      const struct object_id *oid)
 {
 	char *data;
 	unsigned long len;
 	enum object_type t;
 
-	if (is_null_sha1(sha1))
+	if (is_null_oid(oid))
 		return 0;
 
 	/* read_sha1_file NUL-terminates */
-	data = read_sha1_file(sha1, &t, &len);
+	data = read_sha1_file(oid->hash, &t, &len);
 	if (t != OBJ_BLOB || !data || !len) {
 		free(data);
 		return t != OBJ_BLOB || !data;
@@ -884,17 +884,17 @@ static int string_list_join_lines_helper(struct string_list_item *item,
 	return 0;
 }
 
-int combine_notes_cat_sort_uniq(unsigned char *cur_sha1,
-		const unsigned char *new_sha1)
+int combine_notes_cat_sort_uniq(struct object_id *cur_oid,
+				const struct object_id *new_oid)
 {
 	struct string_list sort_uniq_list = STRING_LIST_INIT_DUP;
 	struct strbuf buf = STRBUF_INIT;
 	int ret = 1;
 
 	/* read both note blob objects into unique_lines */
-	if (string_list_add_note_lines(&sort_uniq_list, cur_sha1))
+	if (string_list_add_note_lines(&sort_uniq_list, cur_oid))
 		goto out;
-	if (string_list_add_note_lines(&sort_uniq_list, new_sha1))
+	if (string_list_add_note_lines(&sort_uniq_list, new_oid))
 		goto out;
 	string_list_remove_empty_items(&sort_uniq_list, 0);
 	string_list_sort(&sort_uniq_list);
@@ -905,7 +905,7 @@ int combine_notes_cat_sort_uniq(unsigned char *cur_sha1,
 				 string_list_join_lines_helper, &buf))
 		goto out;
 
-	ret = write_sha1_file(buf.buf, buf.len, blob_type, cur_sha1);
+	ret = write_sha1_file(buf.buf, buf.len, blob_type, cur_oid->hash);
 
 out:
 	strbuf_release(&buf);
diff --git a/notes.h b/notes.h
index 3848c2fb3f..88da38b5f4 100644
--- a/notes.h
+++ b/notes.h
@@ -9,27 +9,32 @@
  * When adding a new note annotating the same object as an existing note, it is
  * up to the caller to decide how to combine the two notes. The decision is
  * made by passing in a function of the following form. The function accepts
- * two SHA1s -- of the existing note and the new note, respectively. The
+ * two object_ids -- of the existing note and the new note, respectively. The
  * function then combines the notes in whatever way it sees fit, and writes the
- * resulting SHA1 into the first SHA1 argument (cur_sha1). A non-zero return
+ * resulting oid into the first argument (cur_oid). A non-zero return
  * value indicates failure.
  *
- * The two given SHA1s shall both be non-NULL and different from each other.
- * Either of them (but not both) may be == null_sha1, which indicates an
- * empty/non-existent note. If the resulting SHA1 (cur_sha1) is == null_sha1,
+ * The two given object_ids shall both be non-NULL and different from each
+ * other. Either of them (but not both) may be == null_oid, which indicates an
+ * empty/non-existent note. If the resulting oid (cur_oid) is == null_oid,
  * the note will be removed from the notes tree.
  *
  * The default combine_notes function (you get this when passing NULL) is
  * combine_notes_concatenate(), which appends the contents of the new note to
  * the contents of the existing note.
  */
-typedef int (*combine_notes_fn)(unsigned char *cur_sha1, const unsigned char *new_sha1);
+typedef int (*combine_notes_fn)(struct object_id *cur_oid,
+				const struct object_id *new_oid);
 
 /* Common notes combinators */
-int combine_notes_concatenate(unsigned char *cur_sha1, const unsigned char *new_sha1);
-int combine_notes_overwrite(unsigned char *cur_sha1, const unsigned char *new_sha1);
-int combine_notes_ignore(unsigned char *cur_sha1, const unsigned char *new_sha1);
-int combine_notes_cat_sort_uniq(unsigned char *cur_sha1, const unsigned char *new_sha1);
+int combine_notes_concatenate(struct object_id *cur_oid,
+			      const struct object_id *new_oid);
+int combine_notes_overwrite(struct object_id *cur_oid,
+			    const struct object_id *new_oid);
+int combine_notes_ignore(struct object_id *cur_oid,
+			 const struct object_id *new_oid);
+int combine_notes_cat_sort_uniq(struct object_id *cur_oid,
+				const struct object_id *new_oid);
 
 /*
  * Notes tree object
-- 
2.14.3

[PATCH 10/11] notes: convert write_notes_tree to object_id

[Patryk Obara]

Convert the definition and declaration of write_notes_tree to
struct object_id and adjust usage of this function.

Additionally, improve style of small part of this function, as old
formatting made it hard to understand at glance what this part of
code is doing.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 notes-cache.c |  2 +-
 notes-utils.c |  2 +-
 notes.c       | 16 +++++++++-------
 notes.h       |  4 ++--
 4 files changed, 13 insertions(+), 11 deletions(-)

diff --git a/notes-cache.c b/notes-cache.c
index d2f87147cc..010ad236cb 100644
--- a/notes-cache.c
+++ b/notes-cache.c
@@ -54,7 +54,7 @@ int notes_cache_write(struct notes_cache *c)
 	if (!c->tree.dirty)
 		return 0;
 
-	if (write_notes_tree(&c->tree, tree_oid.hash))
+	if (write_notes_tree(&c->tree, &tree_oid))
 		return -1;
 	if (commit_tree(c->validity, strlen(c->validity), &tree_oid, NULL,
 			&commit_oid, NULL, NULL) < 0)
diff --git a/notes-utils.c b/notes-utils.c
index 058c642dac..02407fe2a7 100644
--- a/notes-utils.c
+++ b/notes-utils.c
@@ -12,7 +12,7 @@ void create_notes_commit(struct notes_tree *t, struct commit_list *parents,
 
 	assert(t->initialized);
 
-	if (write_notes_tree(t, tree_oid.hash))
+	if (write_notes_tree(t, &tree_oid))
 		die("Failed to write notes tree to database");
 
 	if (!parents) {
diff --git a/notes.c b/notes.c
index 3f4f94507a..09ef1ce33a 100644
--- a/notes.c
+++ b/notes.c
@@ -1123,11 +1123,12 @@ int for_each_note(struct notes_tree *t, int flags, each_note_fn fn,
 	return for_each_note_helper(t, t->root, 0, 0, flags, fn, cb_data);
 }
 
-int write_notes_tree(struct notes_tree *t, unsigned char *result)
+int write_notes_tree(struct notes_tree *t, struct object_id *result)
 {
 	struct tree_write_stack root;
 	struct write_each_note_data cb_data;
 	int ret;
+	int flags;
 
 	if (!t)
 		t = &default_notes_tree;
@@ -1141,12 +1142,13 @@ int write_notes_tree(struct notes_tree *t, unsigned char *result)
 	cb_data.next_non_note = t->first_non_note;
 
 	/* Write tree objects representing current notes tree */
-	ret = for_each_note(t, FOR_EACH_NOTE_DONT_UNPACK_SUBTREES |
-				FOR_EACH_NOTE_YIELD_SUBTREES,
-			write_each_note, &cb_data) ||
-		write_each_non_note_until(NULL, &cb_data) ||
-		tree_write_stack_finish_subtree(&root) ||
-		write_sha1_file(root.buf.buf, root.buf.len, tree_type, result);
+	flags = FOR_EACH_NOTE_DONT_UNPACK_SUBTREES |
+		FOR_EACH_NOTE_YIELD_SUBTREES;
+	ret = for_each_note(t, flags, write_each_note, &cb_data) ||
+	      write_each_non_note_until(NULL, &cb_data) ||
+	      tree_write_stack_finish_subtree(&root) ||
+	      write_sha1_file(root.buf.buf, root.buf.len, tree_type,
+			      result->hash);
 	strbuf_release(&root.buf);
 	return ret;
 }
diff --git a/notes.h b/notes.h
index 88da38b5f4..0433f45db5 100644
--- a/notes.h
+++ b/notes.h
@@ -217,7 +217,7 @@ int for_each_note(struct notes_tree *t, int flags, each_note_fn fn,
  * Write the given notes_tree structure to the object database
  *
  * Creates a new tree object encapsulating the current state of the given
- * notes_tree, and stores its SHA1 into the 'result' argument.
+ * notes_tree, and stores its object id into the 'result' argument.
  *
  * Returns zero on success, non-zero on failure.
  *
@@ -225,7 +225,7 @@ int for_each_note(struct notes_tree *t, int flags, each_note_fn fn,
  * this function has returned zero. Please also remember to create a
  * corresponding commit object, and update the appropriate notes ref.
  */
-int write_notes_tree(struct notes_tree *t, unsigned char *result);
+int write_notes_tree(struct notes_tree *t, struct object_id *result);
 
 /* Flags controlling the operation of prune */
 #define NOTES_PRUNE_VERBOSE 1
-- 
2.14.3

[PATCH 11/11] sha1_file: convert write_sha1_file to object_id

[Patryk Obara]

Convert the definition and declaration of write_sha1_file to
struct object_id and adjust usage of this function.

This commit also converts static function write_sha1_file_prepare, as it
is closely related.

Replace sha1_to_hex, hashcpy and hashclr with their oid equivalents
wherever possible.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 apply.c                  |  8 ++++----
 builtin/checkout.c       |  3 +--
 builtin/mktag.c          |  6 +++---
 builtin/mktree.c         | 10 +++++-----
 builtin/notes.c          |  8 ++++----
 builtin/receive-pack.c   | 11 ++++++-----
 builtin/replace.c        |  2 +-
 builtin/tag.c            |  2 +-
 builtin/unpack-objects.c |  9 ++++++---
 cache-tree.c             |  2 +-
 cache.h                  |  3 ++-
 commit.c                 |  2 +-
 match-trees.c            |  2 +-
 merge-recursive.c        |  5 +++--
 notes-cache.c            |  2 +-
 notes.c                  |  9 ++++-----
 read-cache.c             |  6 +++---
 sha1_file.c              | 25 +++++++++++++------------
 18 files changed, 60 insertions(+), 55 deletions(-)

diff --git a/apply.c b/apply.c
index d6cbb4dc66..4951f8a130 100644
--- a/apply.c
+++ b/apply.c
@@ -3554,7 +3554,7 @@ static int try_threeway(struct apply_state *state,
 
 	/* Preimage the patch was prepared for */
 	if (patch->is_new)
-		write_sha1_file("", 0, blob_type, pre_oid.hash);
+		write_sha1_file("", 0, blob_type, &pre_oid);
 	else if (get_oid(patch->old_sha1_prefix, &pre_oid) ||
 		 read_blob_object(&buf, &pre_oid, patch->old_mode))
 		return error(_("repository lacks the necessary blob to fall back on 3-way merge."));
@@ -3570,7 +3570,7 @@ static int try_threeway(struct apply_state *state,
 		return -1;
 	}
 	/* post_oid is theirs */
-	write_sha1_file(tmp_image.buf, tmp_image.len, blob_type, post_oid.hash);
+	write_sha1_file(tmp_image.buf, tmp_image.len, blob_type, &post_oid);
 	clear_image(&tmp_image);
 
 	/* our_oid is ours */
@@ -3583,7 +3583,7 @@ static int try_threeway(struct apply_state *state,
 			return error(_("cannot read the current contents of '%s'"),
 				     patch->old_name);
 	}
-	write_sha1_file(tmp_image.buf, tmp_image.len, blob_type, our_oid.hash);
+	write_sha1_file(tmp_image.buf, tmp_image.len, blob_type, &our_oid);
 	clear_image(&tmp_image);
 
 	/* in-core three-way merge between post and our using pre as base */
@@ -4291,7 +4291,7 @@ static int add_index_file(struct apply_state *state,
 			}
 			fill_stat_cache_info(ce, &st);
 		}
-		if (write_sha1_file(buf, size, blob_type, ce->oid.hash) < 0) {
+		if (write_sha1_file(buf, size, blob_type, &ce->oid) < 0) {
 			free(ce);
 			return error(_("unable to create backing store "
 				       "for newly created file %s"), path);
diff --git a/builtin/checkout.c b/builtin/checkout.c
index 8bdc927d3f..a98e88288e 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -227,8 +227,7 @@ static int checkout_merged(int pos, const struct checkout *state)
 	 * (it also writes the merge result to the object database even
 	 * when it may contain conflicts).
 	 */
-	if (write_sha1_file(result_buf.ptr, result_buf.size,
-			    blob_type, oid.hash))
+	if (write_sha1_file(result_buf.ptr, result_buf.size, blob_type, &oid))
 		die(_("Unable to add merge result for '%s'"), path);
 	free(result_buf.ptr);
 	ce = make_cache_entry(mode, oid.hash, path, 2, 0);
diff --git a/builtin/mktag.c b/builtin/mktag.c
index 031b750f06..d4044da3e4 100644
--- a/builtin/mktag.c
+++ b/builtin/mktag.c
@@ -151,7 +151,7 @@ static int verify_tag(char *buffer, unsigned long size)
 int cmd_mktag(int argc, const char **argv, const char *prefix)
 {
 	struct strbuf buf = STRBUF_INIT;
-	unsigned char result_sha1[20];
+	struct object_id result;
 
 	if (argc != 1)
 		usage("git mktag");
@@ -165,10 +165,10 @@ int cmd_mktag(int argc, const char **argv, const char *prefix)
 	if (verify_tag(buf.buf, buf.len) < 0)
 		die("invalid tag signature file");
 
-	if (write_sha1_file(buf.buf, buf.len, tag_type, result_sha1) < 0)
+	if (write_sha1_file(buf.buf, buf.len, tag_type, &result) < 0)
 		die("unable to write tag file");
 
 	strbuf_release(&buf);
-	printf("%s\n", sha1_to_hex(result_sha1));
+	printf("%s\n", oid_to_hex(&result));
 	return 0;
 }
diff --git a/builtin/mktree.c b/builtin/mktree.c
index da0fd8cd70..1988f5396d 100644
--- a/builtin/mktree.c
+++ b/builtin/mktree.c
@@ -40,7 +40,7 @@ static int ent_compare(const void *a_, const void *b_)
 				 b->name, b->len, b->mode);
 }
 
-static void write_tree(unsigned char *sha1)
+static void write_tree(struct object_id *oid)
 {
 	struct strbuf buf;
 	size_t size;
@@ -57,7 +57,7 @@ static void write_tree(unsigned char *sha1)
 		strbuf_add(&buf, ent->sha1, 20);
 	}
 
-	write_sha1_file(buf.buf, buf.len, tree_type, sha1);
+	write_sha1_file(buf.buf, buf.len, tree_type, oid);
 	strbuf_release(&buf);
 }
 
@@ -142,7 +142,7 @@ static void mktree_line(char *buf, size_t len, int nul_term_line, int allow_miss
 int cmd_mktree(int ac, const char **av, const char *prefix)
 {
 	struct strbuf sb = STRBUF_INIT;
-	unsigned char sha1[20];
+	struct object_id oid;
 	int nul_term_line = 0;
 	int allow_missing = 0;
 	int is_batch_mode = 0;
@@ -181,8 +181,8 @@ int cmd_mktree(int ac, const char **av, const char *prefix)
 			 */
 			; /* skip creating an empty tree */
 		} else {
-			write_tree(sha1);
-			puts(sha1_to_hex(sha1));
+			write_tree(&oid);
+			puts(oid_to_hex(&oid));
 			fflush(stdout);
 		}
 		used=0; /* reset tree entry buffer for re-use in batch mode */
diff --git a/builtin/notes.c b/builtin/notes.c
index 7c81761645..fb1caf6590 100644
--- a/builtin/notes.c
+++ b/builtin/notes.c
@@ -198,9 +198,9 @@ static void prepare_note_data(const struct object_id *object, struct note_data *
 	}
 }
 
-static void write_note_data(struct note_data *d, unsigned char *sha1)
+static void write_note_data(struct note_data *d, struct object_id *oid)
 {
-	if (write_sha1_file(d->buf.buf, d->buf.len, blob_type, sha1)) {
+	if (write_sha1_file(d->buf.buf, d->buf.len, blob_type, oid)) {
 		error(_("unable to write note object"));
 		if (d->edit_path)
 			error(_("the note contents have been left in %s"),
@@ -459,7 +459,7 @@ static int add(int argc, const char **argv, const char *prefix)
 
 	prepare_note_data(&object, &d, note ? note->hash : NULL);
 	if (d.buf.len || allow_empty) {
-		write_note_data(&d, new_note.hash);
+		write_note_data(&d, &new_note);
 		if (add_note(t, &object, &new_note, combine_notes_overwrite))
 			die("BUG: combine_notes_overwrite failed");
 		commit_notes(t, "Notes added by 'git notes add'");
@@ -619,7 +619,7 @@ static int append_edit(int argc, const char **argv, const char *prefix)
 	}
 
 	if (d.buf.len || allow_empty) {
-		write_note_data(&d, new_note.hash);
+		write_note_data(&d, &new_note);
 		if (add_note(t, &object, &new_note, combine_notes_overwrite))
 			die("BUG: combine_notes_overwrite failed");
 		logmsg = xstrfmt("Notes added by 'git notes %s'", argv[0]);
diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index b7ce7c7f52..dd28d33b30 100644
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -69,7 +69,7 @@ static int sent_capabilities;
 static int shallow_update;
 static const char *alt_shallow_file;
 static struct strbuf push_cert = STRBUF_INIT;
-static unsigned char push_cert_sha1[20];
+static struct object_id push_cert_oid;
 static struct signature_check sigcheck;
 static const char *push_cert_nonce;
 static const char *cert_nonce_seed;
@@ -633,8 +633,9 @@ static void prepare_push_cert_sha1(struct child_process *proc)
 		int bogs /* beginning_of_gpg_sig */;
 
 		already_done = 1;
-		if (write_sha1_file(push_cert.buf, push_cert.len, "blob", push_cert_sha1))
-			hashclr(push_cert_sha1);
+		if (write_sha1_file(push_cert.buf, push_cert.len, "blob",
+				    &push_cert_oid))
+			oidclr(&push_cert_oid);
 
 		memset(&sigcheck, '\0', sizeof(sigcheck));
 		sigcheck.result = 'N';
@@ -655,9 +656,9 @@ static void prepare_push_cert_sha1(struct child_process *proc)
 		strbuf_release(&gpg_status);
 		nonce_status = check_nonce(push_cert.buf, bogs);
 	}
-	if (!is_null_sha1(push_cert_sha1)) {
+	if (!is_null_oid(&push_cert_oid)) {
 		argv_array_pushf(&proc->env_array, "GIT_PUSH_CERT=%s",
-				 sha1_to_hex(push_cert_sha1));
+				 oid_to_hex(&push_cert_oid));
 		argv_array_pushf(&proc->env_array, "GIT_PUSH_CERT_SIGNER=%s",
 				 sigcheck.signer ? sigcheck.signer : "");
 		argv_array_pushf(&proc->env_array, "GIT_PUSH_CERT_KEY=%s",
diff --git a/builtin/replace.c b/builtin/replace.c
index 7267d06b17..358d7aca28 100644
--- a/builtin/replace.c
+++ b/builtin/replace.c
@@ -410,7 +410,7 @@ static int create_graft(int argc, const char **argv, int force)
 
 	check_mergetags(commit, argc, argv);
 
-	if (write_sha1_file(buf.buf, buf.len, commit_type, new.hash))
+	if (write_sha1_file(buf.buf, buf.len, commit_type, &new))
 		die(_("could not write replacement commit for: '%s'"), old_ref);
 
 	strbuf_release(&buf);
diff --git a/builtin/tag.c b/builtin/tag.c
index a7e6a5b0f2..7ef659576e 100644
--- a/builtin/tag.c
+++ b/builtin/tag.c
@@ -187,7 +187,7 @@ static int build_tag_object(struct strbuf *buf, int sign, struct object_id *resu
 {
 	if (sign && do_sign(buf) < 0)
 		return error(_("unable to sign the tag"));
-	if (write_sha1_file(buf->buf, buf->len, tag_type, result->hash) < 0)
+	if (write_sha1_file(buf->buf, buf->len, tag_type, result) < 0)
 		return error(_("unable to write tag file"));
 	return 0;
 }
diff --git a/builtin/unpack-objects.c b/builtin/unpack-objects.c
index 2e494e2a4b..a08f4e2544 100644
--- a/builtin/unpack-objects.c
+++ b/builtin/unpack-objects.c
@@ -172,7 +172,8 @@ static void write_cached_object(struct object *obj, struct obj_buffer *obj_buf)
 {
 	struct object_id oid;
 
-	if (write_sha1_file(obj_buf->buffer, obj_buf->size, typename(obj->type), oid.hash) < 0)
+	if (write_sha1_file(obj_buf->buffer, obj_buf->size, typename(obj->type),
+			    &oid) < 0)
 		die("failed to write object %s", oid_to_hex(&obj->oid));
 	obj->flags |= FLAG_WRITTEN;
 }
@@ -237,14 +238,16 @@ static void write_object(unsigned nr, enum object_type type,
 			 void *buf, unsigned long size)
 {
 	if (!strict) {
-		if (write_sha1_file(buf, size, typename(type), obj_list[nr].oid.hash) < 0)
+		if (write_sha1_file(buf, size, typename(type),
+				    &obj_list[nr].oid) < 0)
 			die("failed to write object");
 		added_object(nr, type, buf, size);
 		free(buf);
 		obj_list[nr].obj = NULL;
 	} else if (type == OBJ_BLOB) {
 		struct blob *blob;
-		if (write_sha1_file(buf, size, typename(type), obj_list[nr].oid.hash) < 0)
+		if (write_sha1_file(buf, size, typename(type),
+				    &obj_list[nr].oid) < 0)
 			die("failed to write object");
 		added_object(nr, type, buf, size);
 		free(buf);
diff --git a/cache-tree.c b/cache-tree.c
index 0df09180ee..2080778039 100644
--- a/cache-tree.c
+++ b/cache-tree.c
@@ -408,7 +408,7 @@ static int update_one(struct cache_tree *it,
 			to_invalidate = 1;
 	} else if (dryrun)
 		hash_sha1_file(buffer.buf, buffer.len, tree_type, &it->oid);
-	else if (write_sha1_file(buffer.buf, buffer.len, tree_type, it->oid.hash)) {
+	else if (write_sha1_file(buffer.buf, buffer.len, tree_type, &it->oid)) {
 		strbuf_release(&buffer);
 		return -1;
 	}
diff --git a/cache.h b/cache.h
index cf98573805..3fe0818c30 100644
--- a/cache.h
+++ b/cache.h
@@ -1238,7 +1238,8 @@ static inline const unsigned char *lookup_replace_object(const unsigned char *sh
 extern int sha1_object_info(const unsigned char *, unsigned long *);
 extern int hash_sha1_file(const void *buf, unsigned long len, const char *type,
 			  struct object_id *oid);
-extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
+extern int write_sha1_file(const void *buf, unsigned long len, const char *type,
+			   struct object_id *oid);
 extern int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type, struct object_id *oid, unsigned flags);
 extern int pretend_sha1_file(void *, unsigned long, enum object_type,
 			     struct object_id *oid);
diff --git a/commit.c b/commit.c
index 760137e54b..dc506f59d2 100644
--- a/commit.c
+++ b/commit.c
@@ -1582,7 +1582,7 @@ int commit_tree_extended(const char *msg, size_t msg_len,
 		goto out;
 	}
 
-	result = write_sha1_file(buffer.buf, buffer.len, commit_type, ret->hash);
+	result = write_sha1_file(buffer.buf, buffer.len, commit_type, ret);
 out:
 	strbuf_release(&buffer);
 	return result;
diff --git a/match-trees.c b/match-trees.c
index 0f899a7212..1fa054b079 100644
--- a/match-trees.c
+++ b/match-trees.c
@@ -214,7 +214,7 @@ static int splice_tree(const struct object_id *hash1, const char *prefix,
 		rewrite_with = hash2;
 	}
 	oidcpy(rewrite_here, rewrite_with);
-	status = write_sha1_file(buf, sz, tree_type, result->hash);
+	status = write_sha1_file(buf, sz, tree_type, result);
 	free(buf);
 	return status;
 }
diff --git a/merge-recursive.c b/merge-recursive.c
index 0fc580d8ca..a17156e214 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -1009,8 +1009,9 @@ static int merge_file_1(struct merge_options *o,
 			if ((merge_status < 0) || !result_buf.ptr)
 				ret = err(o, _("Failed to execute internal merge"));
 
-			if (!ret && write_sha1_file(result_buf.ptr, result_buf.size,
-						    blob_type, result->oid.hash))
+			if (!ret &&
+			    write_sha1_file(result_buf.ptr, result_buf.size,
+					    blob_type, &result->oid))
 				ret = err(o, _("Unable to add %s to database"),
 					  a->path);
 
diff --git a/notes-cache.c b/notes-cache.c
index 010ad236cb..cddb31b72f 100644
--- a/notes-cache.c
+++ b/notes-cache.c
@@ -88,7 +88,7 @@ int notes_cache_put(struct notes_cache *c, struct object_id *key_oid,
 {
 	struct object_id value_oid;
 
-	if (write_sha1_file(data, size, "blob", value_oid.hash) < 0)
+	if (write_sha1_file(data, size, "blob", &value_oid) < 0)
 		return -1;
 	return add_note(&c->tree, key_oid, &value_oid, NULL);
 }
diff --git a/notes.c b/notes.c
index 09ef1ce33a..2764969bcf 100644
--- a/notes.c
+++ b/notes.c
@@ -667,7 +667,7 @@ static int tree_write_stack_finish_subtree(struct tree_write_stack *tws)
 		ret = tree_write_stack_finish_subtree(n);
 		if (ret)
 			return ret;
-		ret = write_sha1_file(n->buf.buf, n->buf.len, tree_type, s.hash);
+		ret = write_sha1_file(n->buf.buf, n->buf.len, tree_type, &s);
 		if (ret)
 			return ret;
 		strbuf_release(&n->buf);
@@ -825,7 +825,7 @@ int combine_notes_concatenate(struct object_id *cur_oid,
 	free(new_msg);
 
 	/* create a new blob object from buf */
-	ret = write_sha1_file(buf, buf_len, blob_type, cur_oid->hash);
+	ret = write_sha1_file(buf, buf_len, blob_type, cur_oid);
 	free(buf);
 	return ret;
 }
@@ -905,7 +905,7 @@ int combine_notes_cat_sort_uniq(struct object_id *cur_oid,
 				 string_list_join_lines_helper, &buf))
 		goto out;
 
-	ret = write_sha1_file(buf.buf, buf.len, blob_type, cur_oid->hash);
+	ret = write_sha1_file(buf.buf, buf.len, blob_type, cur_oid);
 
 out:
 	strbuf_release(&buf);
@@ -1147,8 +1147,7 @@ int write_notes_tree(struct notes_tree *t, struct object_id *result)
 	ret = for_each_note(t, flags, write_each_note, &cb_data) ||
 	      write_each_non_note_until(NULL, &cb_data) ||
 	      tree_write_stack_finish_subtree(&root) ||
-	      write_sha1_file(root.buf.buf, root.buf.len, tree_type,
-			      result->hash);
+	      write_sha1_file(root.buf.buf, root.buf.len, tree_type, result);
 	strbuf_release(&root.buf);
 	return ret;
 }
diff --git a/read-cache.c b/read-cache.c
index 2eb81a66b9..79c21944ef 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -631,10 +631,10 @@ static struct cache_entry *create_alias_ce(struct index_state *istate,
 
 void set_object_name_for_intent_to_add_entry(struct cache_entry *ce)
 {
-	unsigned char sha1[20];
-	if (write_sha1_file("", 0, blob_type, sha1))
+	struct object_id oid;
+	if (write_sha1_file("", 0, blob_type, &oid))
 		die("cannot create an empty blob in the object database");
-	hashcpy(ce->oid.hash, sha1);
+	oidcpy(&ce->oid, &oid);
 }
 
 int add_to_index(struct index_state *istate, const char *path, struct stat *st, int flags)
diff --git a/sha1_file.c b/sha1_file.c
index 88b960316c..b7baf69041 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1420,8 +1420,8 @@ void *read_object_with_reference(const unsigned char *sha1,
 }
 
 static void write_sha1_file_prepare(const void *buf, unsigned long len,
-                                    const char *type, unsigned char *sha1,
-                                    char *hdr, int *hdrlen)
+				    const char *type, struct object_id *oid,
+				    char *hdr, int *hdrlen)
 {
 	git_SHA_CTX c;
 
@@ -1432,7 +1432,7 @@ static void write_sha1_file_prepare(const void *buf, unsigned long len,
 	git_SHA1_Init(&c);
 	git_SHA1_Update(&c, hdr, *hdrlen);
 	git_SHA1_Update(&c, buf, len);
-	git_SHA1_Final(sha1, &c);
+	git_SHA1_Final(oid->hash, &c);
 }
 
 /*
@@ -1490,7 +1490,7 @@ int hash_sha1_file(const void *buf, unsigned long len, const char *type,
 {
 	char hdr[32];
 	int hdrlen = sizeof(hdr);
-	write_sha1_file_prepare(buf, len, type, oid->hash, hdr, &hdrlen);
+	write_sha1_file_prepare(buf, len, type, oid, hdr, &hdrlen);
 	return 0;
 }
 
@@ -1633,7 +1633,8 @@ static int freshen_packed_object(const unsigned char *sha1)
 	return 1;
 }
 
-int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1)
+int write_sha1_file(const void *buf, unsigned long len, const char *type,
+		    struct object_id *oid)
 {
 	char hdr[32];
 	int hdrlen = sizeof(hdr);
@@ -1641,10 +1642,10 @@ int write_sha1_file(const void *buf, unsigned long len, const char *type, unsign
 	/* Normally if we have it in the pack then we do not bother writing
 	 * it out into .git/objects/??/?{38} file.
 	 */
-	write_sha1_file_prepare(buf, len, type, sha1, hdr, &hdrlen);
-	if (freshen_packed_object(sha1) || freshen_loose_object(sha1))
+	write_sha1_file_prepare(buf, len, type, oid, hdr, &hdrlen);
+	if (freshen_packed_object(oid->hash) || freshen_loose_object(oid->hash))
 		return 0;
-	return write_loose_object(sha1, hdr, hdrlen, buf, len, 0);
+	return write_loose_object(oid->hash, hdr, hdrlen, buf, len, 0);
 }
 
 int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type,
@@ -1656,7 +1657,7 @@ int hash_sha1_file_literally(const void *buf, unsigned long len, const char *typ
 	/* type string, SP, %lu of the length plus NUL must fit this */
 	hdrlen = strlen(type) + 32;
 	header = xmalloc(hdrlen);
-	write_sha1_file_prepare(buf, len, type, oid->hash, header, &hdrlen);
+	write_sha1_file_prepare(buf, len, type, oid, header, &hdrlen);
 
 	if (!(flags & HASH_WRITE_OBJECT))
 		goto cleanup;
@@ -1767,7 +1768,7 @@ static int index_mem(struct object_id *oid, void *buf, size_t size,
 	}
 
 	if (write_object)
-		ret = write_sha1_file(buf, size, typename(type), oid->hash);
+		ret = write_sha1_file(buf, size, typename(type), oid);
 	else
 		ret = hash_sha1_file(buf, size, typename(type), oid);
 	if (re_allocated)
@@ -1790,7 +1791,7 @@ static int index_stream_convert_blob(struct object_id *oid, int fd,
 
 	if (write_object)
 		ret = write_sha1_file(sbuf.buf, sbuf.len, typename(OBJ_BLOB),
-				      oid->hash);
+				      oid);
 	else
 		ret = hash_sha1_file(sbuf.buf, sbuf.len, typename(OBJ_BLOB),
 				     oid);
@@ -1908,7 +1909,7 @@ int index_path(struct object_id *oid, const char *path, struct stat *st, unsigne
 			return error_errno("readlink(\"%s\")", path);
 		if (!(flags & HASH_WRITE_OBJECT))
 			hash_sha1_file(sb.buf, sb.len, blob_type, oid);
-		else if (write_sha1_file(sb.buf, sb.len, blob_type, oid->hash))
+		else if (write_sha1_file(sb.buf, sb.len, blob_type, oid))
 			rc = error("%s: failed to insert into database", path);
 		strbuf_release(&sb);
 		break;
-- 
2.14.3

Re: [PATCH 11/11] sha1_file: convert write_sha1_file to object_id

[brian m. carlson]

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On Thu, Jan 18, 2018 at 03:51:03PM +0100, Patryk Obara wrote:
> diff --git a/sha1_file.c b/sha1_file.c
> index 88b960316c..b7baf69041 100644
> --- a/sha1_file.c
> +++ b/sha1_file.c
> @@ -1420,8 +1420,8 @@ void *read_object_with_reference(const unsigned char *sha1,
>  }
>  
>  static void write_sha1_file_prepare(const void *buf, unsigned long len,
> -                                    const char *type, unsigned char *sha1,
> -                                    char *hdr, int *hdrlen)
> +				    const char *type, struct object_id *oid,
> +				    char *hdr, int *hdrlen)

It looks like the indentation has changed here.  Was that intentional?
-- 
brian m. carlson / brian with sandals: Houston, Texas, US
https://www.crustytoothpaste.net/~bmc | My opinion only
OpenPGP: https://keybase.io/bk2204

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Re: [PATCH 11/11] sha1_file: convert write_sha1_file to object_id

[Patryk Obara]

On 20 January 2018 at 21:44, brian m. carlson
<sandals@crustytoothpaste.net> wrote:
> On Thu, Jan 18, 2018 at 03:51:03PM +0100, Patryk Obara wrote:
>> diff --git a/sha1_file.c b/sha1_file.c
>> index 88b960316c..b7baf69041 100644
>> --- a/sha1_file.c
>> +++ b/sha1_file.c
>> @@ -1420,8 +1420,8 @@ void *read_object_with_reference(const unsigned char *sha1,
>>  }
>>
>>  static void write_sha1_file_prepare(const void *buf, unsigned long len,
>> -                                    const char *type, unsigned char *sha1,
>> -                                    char *hdr, int *hdrlen)
>> +                                 const char *type, struct object_id *oid,
>> +                                 char *hdr, int *hdrlen)
>
> It looks like the indentation has changed here.  Was that intentional?

Yes. After every commit, I am running clang-format on lines, that I
touch to verify formatting and
decide if I want to include formatting fixes or not. In this case,
function parameters were
aligned using spaces only (which is arguably hard to see in the mail)
- now they are aligned to first
parameter (at least in my editor and in gitk :)).

-- 
| ← Ceci n'est pas une pipe
Patryk Obara

Re: [PATCH 00/11] Some fixes and bunch of object_id conversions

[Jonathan Tan]

On Thu, 18 Jan 2018 15:50:52 +0100
Patryk Obara <patryk.obara@gmail.com> wrote:

> Patch 1 is not directly related to object_id conversions but helped with
> debugging t5540, which kept failing on master for me (spoiler: it was Fedora
> fault).  It helps with debugging of failing git-push over HTTP in case of
> internal server error, so I think it might be worthwhile.

This patch seems reasonable to me - it is a little strange that,
currently, an error message is printed upon an XML error and upon
failure of start_active_slot(), but not when the slot cannot be run.
This patch fills the gap.

> Patch 2 is a small adjustment to .clang-format, which prevents unnecessary
> line breaks after function return type.

I'm not very familiar with clang-format, so no comment from me here.

> Patch 6 is a tiny fix in oidclr function.

Ah, good catch. I would write the memset line as
"memset(oid, 0, sizeof(*oid))", but the existing one is fine too.

> All other patches are progressive conversions to struct object_id with some
> formatting fixes sprinkled in. These should be somewhat uncontroversial, I hope.

I've looked at those and they appear to be obviously correct.

Re: [PATCH 00/11] Some fixes and bunch of object_id conversions

[brian m. carlson]

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On Thu, Jan 18, 2018 at 03:50:52PM +0100, Patryk Obara wrote:
> * brian m. carlson implemented vtable for hash algorithm selection and pushed
> the repository format front - thanks to him it's now quite easy to
> experimentally replace hashing functions and, e.g. do some performance testing.

Good, I'm glad this has been helpful.

> Patch 1 is not directly related to object_id conversions but helped with
> debugging t5540, which kept failing on master for me (spoiler: it was Fedora
> fault).  It helps with debugging of failing git-push over HTTP in case of
> internal server error, so I think it might be worthwhile.
> 
> Patch 2 is a small adjustment to .clang-format, which prevents unnecessary
> line breaks after function return type.

I have no strong opinions about these two patches, but didn't see
anything that looked problematic.  Better debugging is always nice.

> Patch 6 is a tiny fix in oidclr function.

I think this is a good direction to go in.

> All other patches are progressive conversions to struct object_id with some
> formatting fixes sprinkled in. These should be somewhat uncontroversial, I hope.

Overall, I like the direction this series is going.

When I've made changes to the sha1_file functions, I've traditionally
moved them away from using "sha1_file" to "object_file" to ensure that
we make it a bit more obvious that they handle object_id structs and
aren't limited to SHA-1.  For consistency, it might be nice to make that
change.

Other than that and the question I had about the formatting, I think the
series looks good.
-- 
brian m. carlson / brian with sandals: Houston, Texas, US
https://www.crustytoothpaste.net/~bmc | My opinion only
OpenPGP: https://keybase.io/bk2204

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Re: [PATCH 00/11] Some fixes and bunch of object_id conversions

[Patryk Obara]

On 20 January 2018 at 21:58, brian m. carlson
<sandals@crustytoothpaste.net> wrote:

> When I've made changes to the sha1_file functions, I've traditionally
> moved them away from using "sha1_file" to "object_file" to ensure that
> we make it a bit more obvious that they handle object_id structs and
> aren't limited to SHA-1.  For consistency, it might be nice to make that
> change.

I will address this in V2 and add several more conversions, that
are sufficient to make git hash-object -w work with sha-256 (which I will
send as separate RFC thread).

I started converting functions needed for cat-file, but number of places,
that still needs to be touched up grew quite rapidly, so it'll take some
time :).

-- 
| ← Ceci n'est pas une pipe
Patryk Obara

[PATCH v2 00/14] Some fixes and bunch of object_id conversions

[Patryk Obara]

Compared to v1:

Following brian's suggestion I renamed following functions and struct
names to indicate, that they are no longer intended for sha1 algorithm
only:

struct sha1_stat         -> struct oid_stat
pretend_sha1_file        -> pretend_object_file
write_sha1_file          -> write_object_file
hash_sha1_file           -> hash_object_file
hash_sha1_file_literally -> hash_object_file_literally

Added two more patches converting some more functions to struct object_id
and one with pure function rename.

Patryk Obara (14):
  http-push: improve error log
  clang-format: adjust penalty for return type line break
  sha1_file: convert pretend_sha1_file to object_id
  dir: convert struct sha1_stat to use object_id
  sha1_file: convert hash_sha1_file to object_id
  cache: clear whole hash buffer with oidclr
  match-trees: convert splice_tree to object_id
  commit: convert commit_tree* to object_id
  notes: convert combine_notes_* to object_id
  notes: convert write_notes_tree to object_id
  sha1_file: convert write_sha1_file to object_id
  sha1_file: convert force_object_loose to object_id
  sha1_file: convert write_loose_object to object_id
  sha1_file: rename hash_sha1_file_literally

 .clang-format                                 |   2 +-
 Documentation/technical/api-object-access.txt |   2 +-
 apply.c                                       |  12 ++--
 blame.c                                       |   2 +-
 builtin/am.c                                  |   4 +-
 builtin/checkout.c                            |   3 +-
 builtin/commit-tree.c                         |   4 +-
 builtin/commit.c                              |   5 +-
 builtin/hash-object.c                         |   3 +-
 builtin/index-pack.c                          |   5 +-
 builtin/merge.c                               |   8 +--
 builtin/mktag.c                               |   6 +-
 builtin/mktree.c                              |  10 +--
 builtin/notes.c                               |   8 +--
 builtin/pack-objects.c                        |   2 +-
 builtin/receive-pack.c                        |  11 +--
 builtin/replace.c                             |   4 +-
 builtin/tag.c                                 |   2 +-
 builtin/unpack-objects.c                      |  11 +--
 cache-tree.c                                  |  16 ++---
 cache.h                                       |  25 ++++---
 commit.c                                      |  15 ++--
 commit.h                                      |  11 +--
 convert.c                                     |   6 +-
 diffcore-rename.c                             |   4 +-
 dir.c                                         |  56 +++++++--------
 dir.h                                         |  12 ++--
 http-push.c                                   |   4 ++
 log-tree.c                                    |   2 +-
 match-trees.c                                 |  42 ++++++-----
 merge-recursive.c                             |   5 +-
 notes-cache.c                                 |   8 +--
 notes-merge.c                                 |   9 ++-
 notes-utils.c                                 |   9 +--
 notes-utils.h                                 |   3 +-
 notes.c                                       |  63 ++++++++--------
 notes.h                                       |  29 ++++----
 read-cache.c                                  |   6 +-
 sha1_file.c                                   | 100 ++++++++++++++------------
 t/helper/test-dump-untracked-cache.c          |   4 +-
 40 files changed, 279 insertions(+), 254 deletions(-)


base-commit: 59c276cf4da0705064c32c9dba54baefa282ea55
-- 
2.14.3

[PATCH v2 01/14] http-push: improve error log

[Patryk Obara]

When git push fails due to server-side WebDAV error, it's not easy to
point to the main culprit.  Additional information about exact cURL
error and HTTP server response is helpful for debugging purpose.

New error log helped me pinpoint failing test t5540-http-push-webdav
to a missing Apache dependency in Fedora 27:
https://bugzilla.redhat.com/show_bug.cgi?id=1491151

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 http-push.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/http-push.c b/http-push.c
index 14435ab65d..0913f8ab86 100644
--- a/http-push.c
+++ b/http-push.c
@@ -915,6 +915,10 @@ static struct remote_lock *lock_remote(const char *path, long timeout)
 				lock->timeout = -1;
 			}
 			XML_ParserFree(parser);
+		} else {
+			fprintf(stderr,
+				"error: curl result=%d, HTTP code=%ld\n",
+				results.curl_result, results.http_code);
 		}
 	} else {
 		fprintf(stderr, "Unable to start LOCK request\n");
-- 
2.14.3

[PATCH v2 02/14] clang-format: adjust penalty for return type line break

[Patryk Obara]

The penalty of 5 makes clang-format very eager to put even short type
declarations (e.g. "extern int") into a separate line, even when
breaking parameters list is sufficient.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 .clang-format | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.clang-format b/.clang-format
index 611ab4750b..12a89f95f9 100644
--- a/.clang-format
+++ b/.clang-format
@@ -163,7 +163,7 @@ PenaltyBreakComment: 10
 PenaltyBreakFirstLessLess: 0
 PenaltyBreakString: 10
 PenaltyExcessCharacter: 100
-PenaltyReturnTypeOnItsOwnLine: 5
+PenaltyReturnTypeOnItsOwnLine: 60
 
 # Don't sort #include's
 SortIncludes: false
-- 
2.14.3

[PATCH v2 03/14] sha1_file: convert pretend_sha1_file to object_id

[Patryk Obara]

Convert the declaration and definition of pretend_sha1_file to use
struct object_id and adjust all usages of this function.  Rename it to
pretend_object_file.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 Documentation/technical/api-object-access.txt |  2 +-
 blame.c                                       |  2 +-
 cache.h                                       |  5 ++++-
 sha1_file.c                                   | 10 +++++-----
 4 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/Documentation/technical/api-object-access.txt b/Documentation/technical/api-object-access.txt
index 03bb0e950d..a1162e5bcd 100644
--- a/Documentation/technical/api-object-access.txt
+++ b/Documentation/technical/api-object-access.txt
@@ -7,7 +7,7 @@ Talk about <sha1_file.c> and <object.h> family, things like
 * read_object_with_reference()
 * has_sha1_file()
 * write_sha1_file()
-* pretend_sha1_file()
+* pretend_object_file()
 * lookup_{object,commit,tag,blob,tree}
 * parse_{object,commit,tag,blob,tree}
 * Use of object flags
diff --git a/blame.c b/blame.c
index 2893f3c103..1fc22b304b 100644
--- a/blame.c
+++ b/blame.c
@@ -232,7 +232,7 @@ static struct commit *fake_working_tree_commit(struct diff_options *opt,
 	convert_to_git(&the_index, path, buf.buf, buf.len, &buf, 0);
 	origin->file.ptr = buf.buf;
 	origin->file.size = buf.len;
-	pretend_sha1_file(buf.buf, buf.len, OBJ_BLOB, origin->blob_oid.hash);
+	pretend_object_file(buf.buf, buf.len, OBJ_BLOB, &origin->blob_oid);
 
 	/*
 	 * Read the current index, replace the path entry with
diff --git a/cache.h b/cache.h
index d8b975a571..e4e03ac51d 100644
--- a/cache.h
+++ b/cache.h
@@ -1241,7 +1241,10 @@ extern int sha1_object_info(const unsigned char *, unsigned long *);
 extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
 extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
 extern int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type, struct object_id *oid, unsigned flags);
-extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
+
+extern int pretend_object_file(void *, unsigned long, enum object_type,
+			       struct object_id *oid);
+
 extern int force_object_loose(const unsigned char *sha1, time_t mtime);
 extern int git_open_cloexec(const char *name, int flags);
 #define git_open(name) git_open_cloexec(name, O_RDONLY)
diff --git a/sha1_file.c b/sha1_file.c
index 3da70ac650..830b93b428 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1312,13 +1312,13 @@ static void *read_object(const unsigned char *sha1, enum object_type *type,
 	return content;
 }
 
-int pretend_sha1_file(void *buf, unsigned long len, enum object_type type,
-		      unsigned char *sha1)
+int pretend_object_file(void *buf, unsigned long len, enum object_type type,
+			struct object_id *oid)
 {
 	struct cached_object *co;
 
-	hash_sha1_file(buf, len, typename(type), sha1);
-	if (has_sha1_file(sha1) || find_cached_object(sha1))
+	hash_sha1_file(buf, len, typename(type), oid->hash);
+	if (has_sha1_file(oid->hash) || find_cached_object(oid->hash))
 		return 0;
 	ALLOC_GROW(cached_objects, cached_object_nr + 1, cached_object_alloc);
 	co = &cached_objects[cached_object_nr++];
@@ -1326,7 +1326,7 @@ int pretend_sha1_file(void *buf, unsigned long len, enum object_type type,
 	co->type = type;
 	co->buf = xmalloc(len);
 	memcpy(co->buf, buf, len);
-	hashcpy(co->sha1, sha1);
+	hashcpy(co->sha1, oid->hash);
 	return 0;
 }
 
-- 
2.14.3

[PATCH v2 04/14] dir: convert struct sha1_stat to use object_id

[Patryk Obara]

Convert the declaration of struct sha1_stat. Adjust all usages of this
struct and replace hash{clr,cmp,cpy} with oid{clr,cmp,cpy} wherever
possible.  Rename it to struct oid_stat.

Remove macro EMPTY_BLOB_SHA1_BIN, as it's no longer used.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 cache.h                              |  2 --
 dir.c                                | 56 +++++++++++++++++-------------------
 dir.h                                | 12 ++++----
 t/helper/test-dump-untracked-cache.c |  4 +--
 4 files changed, 34 insertions(+), 40 deletions(-)

diff --git a/cache.h b/cache.h
index e4e03ac51d..ed72933ba7 100644
--- a/cache.h
+++ b/cache.h
@@ -1047,8 +1047,6 @@ extern const struct object_id empty_tree_oid;
 	"\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \
 	"\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91"
 extern const struct object_id empty_blob_oid;
-#define EMPTY_BLOB_SHA1_BIN (empty_blob_oid.hash)
-
 
 static inline int is_empty_blob_sha1(const unsigned char *sha1)
 {
diff --git a/dir.c b/dir.c
index 7c4b45e30e..ef977b8657 100644
--- a/dir.c
+++ b/dir.c
@@ -233,10 +233,8 @@ int within_depth(const char *name, int namelen,
  *
  * Optionally updates the given sha1_stat with the given OID (when valid).
  */
-static int do_read_blob(const struct object_id *oid,
-			struct sha1_stat *sha1_stat,
-			size_t *size_out,
-			char **data_out)
+static int do_read_blob(const struct object_id *oid, struct oid_stat *sha1_stat,
+			size_t *size_out, char **data_out)
 {
 	enum object_type type;
 	unsigned long sz;
@@ -253,7 +251,7 @@ static int do_read_blob(const struct object_id *oid,
 
 	if (sha1_stat) {
 		memset(&sha1_stat->stat, 0, sizeof(sha1_stat->stat));
-		hashcpy(sha1_stat->sha1, oid->hash);
+		oidcpy(&sha1_stat->oid, oid);
 	}
 
 	if (sz == 0) {
@@ -654,9 +652,8 @@ void add_exclude(const char *string, const char *base,
 
 static int read_skip_worktree_file_from_index(const struct index_state *istate,
 					      const char *path,
-					      size_t *size_out,
-					      char **data_out,
-					      struct sha1_stat *sha1_stat)
+					      size_t *size_out, char **data_out,
+					      struct oid_stat *sha1_stat)
 {
 	int pos, len;
 
@@ -795,9 +792,8 @@ static int add_excludes_from_buffer(char *buf, size_t size,
  * ss_valid is non-zero, "ss" must contain good value as input.
  */
 static int add_excludes(const char *fname, const char *base, int baselen,
-			struct exclude_list *el,
-			struct index_state *istate,
-			struct sha1_stat *sha1_stat)
+			struct exclude_list *el, struct index_state *istate,
+			struct oid_stat *sha1_stat)
 {
 	struct stat st;
 	int r;
@@ -823,7 +819,7 @@ static int add_excludes(const char *fname, const char *base, int baselen,
 		if (size == 0) {
 			if (sha1_stat) {
 				fill_stat_data(&sha1_stat->stat, &st);
-				hashcpy(sha1_stat->sha1, EMPTY_BLOB_SHA1_BIN);
+				oidcpy(&sha1_stat->oid, &empty_blob_oid);
 				sha1_stat->valid = 1;
 			}
 			close(fd);
@@ -847,10 +843,11 @@ static int add_excludes(const char *fname, const char *base, int baselen,
 				 !ce_stage(istate->cache[pos]) &&
 				 ce_uptodate(istate->cache[pos]) &&
 				 !would_convert_to_git(istate, fname))
-				hashcpy(sha1_stat->sha1,
-					istate->cache[pos]->oid.hash);
+				oidcpy(&sha1_stat->oid,
+				       &istate->cache[pos]->oid);
 			else
-				hash_sha1_file(buf, size, "blob", sha1_stat->sha1);
+				hash_sha1_file(buf, size, "blob",
+					       sha1_stat->oid.hash);
 			fill_stat_data(&sha1_stat->stat, &st);
 			sha1_stat->valid = 1;
 		}
@@ -930,7 +927,7 @@ struct exclude_list *add_exclude_list(struct dir_struct *dir,
  * Used to set up core.excludesfile and .git/info/exclude lists.
  */
 static void add_excludes_from_file_1(struct dir_struct *dir, const char *fname,
-				     struct sha1_stat *sha1_stat)
+				     struct oid_stat *sha1_stat)
 {
 	struct exclude_list *el;
 	/*
@@ -1180,7 +1177,7 @@ static void prep_exclude(struct dir_struct *dir,
 
 	while (current < baselen) {
 		const char *cp;
-		struct sha1_stat sha1_stat;
+		struct oid_stat sha1_stat;
 
 		stk = xcalloc(1, sizeof(*stk));
 		if (current < 0) {
@@ -1223,7 +1220,7 @@ static void prep_exclude(struct dir_struct *dir,
 		}
 
 		/* Try to read per-directory file */
-		hashclr(sha1_stat.sha1);
+		oidclr(&sha1_stat.oid);
 		sha1_stat.valid = 0;
 		if (dir->exclude_per_dir &&
 		    /*
@@ -1269,9 +1266,9 @@ static void prep_exclude(struct dir_struct *dir,
 		 * order, though, if you do that.
 		 */
 		if (untracked &&
-		    hashcmp(sha1_stat.sha1, untracked->exclude_sha1)) {
+		    hashcmp(sha1_stat.oid.hash, untracked->exclude_sha1)) {
 			invalidate_gitignore(dir->untracked, untracked);
-			hashcpy(untracked->exclude_sha1, sha1_stat.sha1);
+			hashcpy(untracked->exclude_sha1, sha1_stat.oid.hash);
 		}
 		dir->exclude_stack = stk;
 		current = stk->baselen;
@@ -2228,13 +2225,13 @@ static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *d
 
 	/* Validate $GIT_DIR/info/exclude and core.excludesfile */
 	root = dir->untracked->root;
-	if (hashcmp(dir->ss_info_exclude.sha1,
-		    dir->untracked->ss_info_exclude.sha1)) {
+	if (oidcmp(&dir->ss_info_exclude.oid,
+		   &dir->untracked->ss_info_exclude.oid)) {
 		invalidate_gitignore(dir->untracked, root);
 		dir->untracked->ss_info_exclude = dir->ss_info_exclude;
 	}
-	if (hashcmp(dir->ss_excludes_file.sha1,
-		    dir->untracked->ss_excludes_file.sha1)) {
+	if (oidcmp(&dir->ss_excludes_file.oid,
+		   &dir->untracked->ss_excludes_file.oid)) {
 		invalidate_gitignore(dir->untracked, root);
 		dir->untracked->ss_excludes_file = dir->ss_excludes_file;
 	}
@@ -2638,8 +2635,8 @@ void write_untracked_extension(struct strbuf *out, struct untracked_cache *untra
 	FLEX_ALLOC_MEM(ouc, exclude_per_dir, untracked->exclude_per_dir, len);
 	stat_data_to_disk(&ouc->info_exclude_stat, &untracked->ss_info_exclude.stat);
 	stat_data_to_disk(&ouc->excludes_file_stat, &untracked->ss_excludes_file.stat);
-	hashcpy(ouc->info_exclude_sha1, untracked->ss_info_exclude.sha1);
-	hashcpy(ouc->excludes_file_sha1, untracked->ss_excludes_file.sha1);
+	hashcpy(ouc->info_exclude_sha1, untracked->ss_info_exclude.oid.hash);
+	hashcpy(ouc->excludes_file_sha1, untracked->ss_excludes_file.oid.hash);
 	ouc->dir_flags = htonl(untracked->dir_flags);
 
 	varint_len = encode_varint(untracked->ident.len, varbuf);
@@ -2816,12 +2813,11 @@ static void read_sha1(size_t pos, void *cb)
 	rd->data += 20;
 }
 
-static void load_sha1_stat(struct sha1_stat *sha1_stat,
-			   const unsigned char *data,
-			   const unsigned char *sha1)
+static void load_sha1_stat(struct oid_stat *sha1_stat,
+			   const unsigned char *data, const unsigned char *sha1)
 {
 	stat_data_from_disk(&sha1_stat->stat, data);
-	hashcpy(sha1_stat->sha1, sha1);
+	hashcpy(sha1_stat->oid.hash, sha1);
 	sha1_stat->valid = 1;
 }
 
diff --git a/dir.h b/dir.h
index 11a047ba48..e7bb786a33 100644
--- a/dir.h
+++ b/dir.h
@@ -74,9 +74,9 @@ struct exclude_list_group {
 	struct exclude_list *el;
 };
 
-struct sha1_stat {
+struct oid_stat {
 	struct stat_data stat;
-	unsigned char sha1[20];
+	struct object_id oid;
 	int valid;
 };
 
@@ -124,8 +124,8 @@ struct untracked_cache_dir {
 };
 
 struct untracked_cache {
-	struct sha1_stat ss_info_exclude;
-	struct sha1_stat ss_excludes_file;
+	struct oid_stat ss_info_exclude;
+	struct oid_stat ss_excludes_file;
 	const char *exclude_per_dir;
 	struct strbuf ident;
 	/*
@@ -195,8 +195,8 @@ struct dir_struct {
 
 	/* Enable untracked file cache if set */
 	struct untracked_cache *untracked;
-	struct sha1_stat ss_info_exclude;
-	struct sha1_stat ss_excludes_file;
+	struct oid_stat ss_info_exclude;
+	struct oid_stat ss_excludes_file;
 	unsigned unmanaged_exclude_files;
 };
 
diff --git a/t/helper/test-dump-untracked-cache.c b/t/helper/test-dump-untracked-cache.c
index f752532ffb..d7c55c2355 100644
--- a/t/helper/test-dump-untracked-cache.c
+++ b/t/helper/test-dump-untracked-cache.c
@@ -54,8 +54,8 @@ int cmd_main(int ac, const char **av)
 		printf("no untracked cache\n");
 		return 0;
 	}
-	printf("info/exclude %s\n", sha1_to_hex(uc->ss_info_exclude.sha1));
-	printf("core.excludesfile %s\n", sha1_to_hex(uc->ss_excludes_file.sha1));
+	printf("info/exclude %s\n", oid_to_hex(&uc->ss_info_exclude.oid));
+	printf("core.excludesfile %s\n", oid_to_hex(&uc->ss_excludes_file.oid));
 	printf("exclude_per_dir %s\n", uc->exclude_per_dir);
 	printf("flags %08x\n", uc->dir_flags);
 	if (uc->root)
-- 
2.14.3

[PATCH v2 05/14] sha1_file: convert hash_sha1_file to object_id

[Patryk Obara]

Convert the declaration and definition of hash_sha1_file to use
struct object_id and adjust all function calls.

Rename this function to hash_object_file.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 apply.c                  |  4 ++--
 builtin/index-pack.c     |  5 ++---
 builtin/replace.c        |  2 +-
 builtin/unpack-objects.c |  2 +-
 cache-tree.c             | 11 +++++------
 cache.h                  |  5 ++++-
 convert.c                |  6 +++---
 diffcore-rename.c        |  4 ++--
 dir.c                    |  4 ++--
 log-tree.c               |  2 +-
 sha1_file.c              | 26 +++++++++++++-------------
 11 files changed, 36 insertions(+), 35 deletions(-)

diff --git a/apply.c b/apply.c
index 321a9fa68d..57ab8a8a29 100644
--- a/apply.c
+++ b/apply.c
@@ -3154,7 +3154,7 @@ static int apply_binary(struct apply_state *state,
 		 * See if the old one matches what the patch
 		 * applies to.
 		 */
-		hash_sha1_file(img->buf, img->len, blob_type, oid.hash);
+		hash_object_file(img->buf, img->len, blob_type, &oid);
 		if (strcmp(oid_to_hex(&oid), patch->old_sha1_prefix))
 			return error(_("the patch applies to '%s' (%s), "
 				       "which does not match the "
@@ -3199,7 +3199,7 @@ static int apply_binary(struct apply_state *state,
 				     name);
 
 		/* verify that the result matches */
-		hash_sha1_file(img->buf, img->len, blob_type, oid.hash);
+		hash_object_file(img->buf, img->len, blob_type, &oid);
 		if (strcmp(oid_to_hex(&oid), patch->new_sha1_prefix))
 			return error(_("binary patch to '%s' creates incorrect result (expecting %s, got %s)"),
 				name, patch->new_sha1_prefix, oid_to_hex(&oid));
diff --git a/builtin/index-pack.c b/builtin/index-pack.c
index 4c51aec81f..7f5a95e6ff 100644
--- a/builtin/index-pack.c
+++ b/builtin/index-pack.c
@@ -958,9 +958,8 @@ static void resolve_delta(struct object_entry *delta_obj,
 	free(delta_data);
 	if (!result->data)
 		bad_object(delta_obj->idx.offset, _("failed to apply delta"));
-	hash_sha1_file(result->data, result->size,
-		       typename(delta_obj->real_type),
-		       delta_obj->idx.oid.hash);
+	hash_object_file(result->data, result->size,
+			 typename(delta_obj->real_type), &delta_obj->idx.oid);
 	sha1_object(result->data, NULL, result->size, delta_obj->real_type,
 		    &delta_obj->idx.oid);
 	counter_lock();
diff --git a/builtin/replace.c b/builtin/replace.c
index 10078ae371..814bf6bfde 100644
--- a/builtin/replace.c
+++ b/builtin/replace.c
@@ -355,7 +355,7 @@ static void check_one_mergetag(struct commit *commit,
 	struct tag *tag;
 	int i;
 
-	hash_sha1_file(extra->value, extra->len, typename(OBJ_TAG), tag_oid.hash);
+	hash_object_file(extra->value, extra->len, typename(OBJ_TAG), &tag_oid);
 	tag = lookup_tag(&tag_oid);
 	if (!tag)
 		die(_("bad mergetag in commit '%s'"), ref);
diff --git a/builtin/unpack-objects.c b/builtin/unpack-objects.c
index 62ea264c46..85a40d1af7 100644
--- a/builtin/unpack-objects.c
+++ b/builtin/unpack-objects.c
@@ -258,7 +258,7 @@ static void write_object(unsigned nr, enum object_type type,
 	} else {
 		struct object *obj;
 		int eaten;
-		hash_sha1_file(buf, size, typename(type), obj_list[nr].oid.hash);
+		hash_object_file(buf, size, typename(type), &obj_list[nr].oid);
 		added_object(nr, type, buf, size);
 		obj = parse_object_buffer(&obj_list[nr].oid, type, size, buf,
 					  &eaten);
diff --git a/cache-tree.c b/cache-tree.c
index e03e72c34a..6574eeb80d 100644
--- a/cache-tree.c
+++ b/cache-tree.c
@@ -400,15 +400,14 @@ static int update_one(struct cache_tree *it,
 	}
 
 	if (repair) {
-		unsigned char sha1[20];
-		hash_sha1_file(buffer.buf, buffer.len, tree_type, sha1);
-		if (has_sha1_file(sha1))
-			hashcpy(it->oid.hash, sha1);
+		struct object_id oid;
+		hash_object_file(buffer.buf, buffer.len, tree_type, &oid);
+		if (has_sha1_file(oid.hash))
+			oidcpy(&it->oid, &oid);
 		else
 			to_invalidate = 1;
 	} else if (dryrun)
-		hash_sha1_file(buffer.buf, buffer.len, tree_type,
-			       it->oid.hash);
+		hash_object_file(buffer.buf, buffer.len, tree_type, &it->oid);
 	else if (write_sha1_file(buffer.buf, buffer.len, tree_type, it->oid.hash)) {
 		strbuf_release(&buffer);
 		return -1;
diff --git a/cache.h b/cache.h
index ed72933ba7..08f2b81e1b 100644
--- a/cache.h
+++ b/cache.h
@@ -1236,7 +1236,10 @@ static inline const unsigned char *lookup_replace_object(const unsigned char *sh
 
 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
 extern int sha1_object_info(const unsigned char *, unsigned long *);
-extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
+
+extern int hash_object_file(const void *buf, unsigned long len,
+			    const char *type, struct object_id *oid);
+
 extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
 extern int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type, struct object_id *oid, unsigned flags);
 
diff --git a/convert.c b/convert.c
index 1a41a48e15..d25a4757ad 100644
--- a/convert.c
+++ b/convert.c
@@ -898,7 +898,7 @@ static int ident_to_git(const char *path, const char *src, size_t len,
 static int ident_to_worktree(const char *path, const char *src, size_t len,
                              struct strbuf *buf, int ident)
 {
-	unsigned char sha1[20];
+	struct object_id oid;
 	char *to_free = NULL, *dollar, *spc;
 	int cnt;
 
@@ -912,7 +912,7 @@ static int ident_to_worktree(const char *path, const char *src, size_t len,
 	/* are we "faking" in place editing ? */
 	if (src == buf->buf)
 		to_free = strbuf_detach(buf, NULL);
-	hash_sha1_file(src, len, "blob", sha1);
+	hash_object_file(src, len, "blob", &oid);
 
 	strbuf_grow(buf, len + cnt * 43);
 	for (;;) {
@@ -969,7 +969,7 @@ static int ident_to_worktree(const char *path, const char *src, size_t len,
 
 		/* step 4: substitute */
 		strbuf_addstr(buf, "Id: ");
-		strbuf_add(buf, sha1_to_hex(sha1), 40);
+		strbuf_add(buf, sha1_to_hex(oid.hash), GIT_SHA1_HEXSZ);
 		strbuf_addstr(buf, " $");
 	}
 	strbuf_add(buf, src, len);
diff --git a/diffcore-rename.c b/diffcore-rename.c
index 245e999fe5..e27d0bb632 100644
--- a/diffcore-rename.c
+++ b/diffcore-rename.c
@@ -260,8 +260,8 @@ static unsigned int hash_filespec(struct diff_filespec *filespec)
 	if (!filespec->oid_valid) {
 		if (diff_populate_filespec(filespec, 0))
 			return 0;
-		hash_sha1_file(filespec->data, filespec->size, "blob",
-			       filespec->oid.hash);
+		hash_object_file(filespec->data, filespec->size, "blob",
+				 &filespec->oid);
 	}
 	return sha1hash(filespec->oid.hash);
 }
diff --git a/dir.c b/dir.c
index ef977b8657..177f9027be 100644
--- a/dir.c
+++ b/dir.c
@@ -846,8 +846,8 @@ static int add_excludes(const char *fname, const char *base, int baselen,
 				oidcpy(&sha1_stat->oid,
 				       &istate->cache[pos]->oid);
 			else
-				hash_sha1_file(buf, size, "blob",
-					       sha1_stat->oid.hash);
+				hash_object_file(buf, size, "blob",
+						 &sha1_stat->oid);
 			fill_stat_data(&sha1_stat->stat, &st);
 			sha1_stat->valid = 1;
 		}
diff --git a/log-tree.c b/log-tree.c
index fca29d4799..fc0cc0d6d1 100644
--- a/log-tree.c
+++ b/log-tree.c
@@ -499,7 +499,7 @@ static void show_one_mergetag(struct commit *commit,
 	int status, nth;
 	size_t payload_size, gpg_message_offset;
 
-	hash_sha1_file(extra->value, extra->len, typename(OBJ_TAG), oid.hash);
+	hash_object_file(extra->value, extra->len, typename(OBJ_TAG), &oid);
 	tag = lookup_tag(&oid);
 	if (!tag)
 		return; /* error message already given */
diff --git a/sha1_file.c b/sha1_file.c
index 830b93b428..4c44c60cec 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -788,7 +788,7 @@ void *xmmap(void *start, size_t length,
 int check_sha1_signature(const unsigned char *sha1, void *map,
 			 unsigned long size, const char *type)
 {
-	unsigned char real_sha1[20];
+	struct object_id real_oid;
 	enum object_type obj_type;
 	struct git_istream *st;
 	git_SHA_CTX c;
@@ -796,8 +796,8 @@ int check_sha1_signature(const unsigned char *sha1, void *map,
 	int hdrlen;
 
 	if (map) {
-		hash_sha1_file(map, size, type, real_sha1);
-		return hashcmp(sha1, real_sha1) ? -1 : 0;
+		hash_object_file(map, size, type, &real_oid);
+		return hashcmp(sha1, real_oid.hash) ? -1 : 0;
 	}
 
 	st = open_istream(sha1, &obj_type, &size, NULL);
@@ -822,9 +822,9 @@ int check_sha1_signature(const unsigned char *sha1, void *map,
 			break;
 		git_SHA1_Update(&c, buf, readlen);
 	}
-	git_SHA1_Final(real_sha1, &c);
+	git_SHA1_Final(real_oid.hash, &c);
 	close_istream(st);
-	return hashcmp(sha1, real_sha1) ? -1 : 0;
+	return hashcmp(sha1, real_oid.hash) ? -1 : 0;
 }
 
 int git_open_cloexec(const char *name, int flags)
@@ -1317,7 +1317,7 @@ int pretend_object_file(void *buf, unsigned long len, enum object_type type,
 {
 	struct cached_object *co;
 
-	hash_sha1_file(buf, len, typename(type), oid->hash);
+	hash_object_file(buf, len, typename(type), oid);
 	if (has_sha1_file(oid->hash) || find_cached_object(oid->hash))
 		return 0;
 	ALLOC_GROW(cached_objects, cached_object_nr + 1, cached_object_alloc);
@@ -1485,12 +1485,12 @@ static int write_buffer(int fd, const void *buf, size_t len)
 	return 0;
 }
 
-int hash_sha1_file(const void *buf, unsigned long len, const char *type,
-                   unsigned char *sha1)
+int hash_object_file(const void *buf, unsigned long len, const char *type,
+		     struct object_id *oid)
 {
 	char hdr[32];
 	int hdrlen = sizeof(hdr);
-	write_sha1_file_prepare(buf, len, type, sha1, hdr, &hdrlen);
+	write_sha1_file_prepare(buf, len, type, oid->hash, hdr, &hdrlen);
 	return 0;
 }
 
@@ -1769,7 +1769,7 @@ static int index_mem(struct object_id *oid, void *buf, size_t size,
 	if (write_object)
 		ret = write_sha1_file(buf, size, typename(type), oid->hash);
 	else
-		ret = hash_sha1_file(buf, size, typename(type), oid->hash);
+		ret = hash_object_file(buf, size, typename(type), oid);
 	if (re_allocated)
 		free(buf);
 	return ret;
@@ -1792,8 +1792,8 @@ static int index_stream_convert_blob(struct object_id *oid, int fd,
 		ret = write_sha1_file(sbuf.buf, sbuf.len, typename(OBJ_BLOB),
 				      oid->hash);
 	else
-		ret = hash_sha1_file(sbuf.buf, sbuf.len, typename(OBJ_BLOB),
-				     oid->hash);
+		ret = hash_object_file(sbuf.buf, sbuf.len, typename(OBJ_BLOB),
+				       oid);
 	strbuf_release(&sbuf);
 	return ret;
 }
@@ -1907,7 +1907,7 @@ int index_path(struct object_id *oid, const char *path, struct stat *st, unsigne
 		if (strbuf_readlink(&sb, path, st->st_size))
 			return error_errno("readlink(\"%s\")", path);
 		if (!(flags & HASH_WRITE_OBJECT))
-			hash_sha1_file(sb.buf, sb.len, blob_type, oid->hash);
+			hash_object_file(sb.buf, sb.len, blob_type, oid);
 		else if (write_sha1_file(sb.buf, sb.len, blob_type, oid->hash))
 			rc = error("%s: failed to insert into database", path);
 		strbuf_release(&sb);
-- 
2.14.3

Re: [PATCH v2 05/14] sha1_file: convert hash_sha1_file to object_id

[Duy Nguyen]

On Mon, Jan 22, 2018 at 12:04:28PM +0100, Patryk Obara wrote:
> @@ -969,7 +969,7 @@ static int ident_to_worktree(const char *path, const char *src, size_t len,
>  
>  		/* step 4: substitute */
>  		strbuf_addstr(buf, "Id: ");
> -		strbuf_add(buf, sha1_to_hex(sha1), 40);
> +		strbuf_add(buf, sha1_to_hex(oid.hash), GIT_SHA1_HEXSZ);

oid_to_hex()?

--
Duy

Re: [PATCH v2 05/14] sha1_file: convert hash_sha1_file to object_id

[Patryk Obara]

On 22 January 2018 at 12:49, Duy Nguyen <pclouds@gmail.com> wrote:
> On Mon, Jan 22, 2018 at 12:04:28PM +0100, Patryk Obara wrote:
>> @@ -969,7 +969,7 @@ static int ident_to_worktree(const char *path, const char *src, size_t len,
>>
>>               /* step 4: substitute */
>>               strbuf_addstr(buf, "Id: ");
>> -             strbuf_add(buf, sha1_to_hex(sha1), 40);
>> +             strbuf_add(buf, sha1_to_hex(oid.hash), GIT_SHA1_HEXSZ);
>
> oid_to_hex()?

I didn't do it originally because the size of hash is explicitly
passed as the third parameter.
I should probably replace this line with:

strbuf_addstr(buf, oid_to_hex(&oid));

... since a hex representation is correctly 0-delimited anyway.
Will include in v3 unless there'll be some other suggestion :)

-- 
| ← Ceci n'est pas une pipe
Patryk Obara

Re: [PATCH v2 05/14] sha1_file: convert hash_sha1_file to object_id

[Duy Nguyen]

On Mon, Jan 22, 2018 at 7:44 PM, Patryk Obara <patryk.obara@gmail.com> wrote:
> On 22 January 2018 at 12:49, Duy Nguyen <pclouds@gmail.com> wrote:
>> On Mon, Jan 22, 2018 at 12:04:28PM +0100, Patryk Obara wrote:
>>> @@ -969,7 +969,7 @@ static int ident_to_worktree(const char *path, const char *src, size_t len,
>>>
>>>               /* step 4: substitute */
>>>               strbuf_addstr(buf, "Id: ");
>>> -             strbuf_add(buf, sha1_to_hex(sha1), 40);
>>> +             strbuf_add(buf, sha1_to_hex(oid.hash), GIT_SHA1_HEXSZ);
>>
>> oid_to_hex()?
>
> I didn't do it originally because the size of hash is explicitly
> passed as the third parameter.

Aha! I didn't see that.

> I should probably replace this line with:
>
> strbuf_addstr(buf, oid_to_hex(&oid));
>
> ... since a hex representation is correctly 0-delimited anyway.

Yeah I think that's a good idea. This 40 came from 3fed15f568 (Add
'ident' conversion. - 2007-04-21). Back then memcpy was used and 40
made sense. The conversion to strbuf should have used strbuf_addstr()
as you suggested, unless there's performance concerns, but I don't
think there is any.
-- 
Duy

[PATCH v2 06/14] cache: clear whole hash buffer with oidclr

[Patryk Obara]

As long as GIT_SHA1_RAWSZ is equal to GIT_MAX_RAWSZ there's no problem,
but when new hashing algorithm will be in place this memset will clear
only 20-byte prefix of hash buffer.

Alternatively, hashclr implementation could be adjusted, but this
function is almost removed from codebase already.  Separate
implementation of oidclr prevents potential buffer overrun in case
someone incorrectly used hashclr on object_id in future.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 cache.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cache.h b/cache.h
index 08f2b81e1b..d5d78d6a51 100644
--- a/cache.h
+++ b/cache.h
@@ -1029,7 +1029,7 @@ static inline void hashclr(unsigned char *hash)
 
 static inline void oidclr(struct object_id *oid)
 {
-	hashclr(oid->hash);
+	memset(oid->hash, 0, GIT_MAX_RAWSZ);
 }
 
 
-- 
2.14.3

[PATCH v2 07/14] match-trees: convert splice_tree to object_id

[Patryk Obara]

Convert the definition of static recursive splice_tree function to use
struct object_id and adjust single caller.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 match-trees.c | 42 ++++++++++++++++++++----------------------
 1 file changed, 20 insertions(+), 22 deletions(-)

diff --git a/match-trees.c b/match-trees.c
index 396b7338df..0f899a7212 100644
--- a/match-trees.c
+++ b/match-trees.c
@@ -161,19 +161,17 @@ static void match_trees(const struct object_id *hash1,
  * A tree "hash1" has a subdirectory at "prefix".  Come up with a
  * tree object by replacing it with another tree "hash2".
  */
-static int splice_tree(const unsigned char *hash1,
-		       const char *prefix,
-		       const unsigned char *hash2,
-		       unsigned char *result)
+static int splice_tree(const struct object_id *hash1, const char *prefix,
+		       const struct object_id *hash2, struct object_id *result)
 {
 	char *subpath;
 	int toplen;
 	char *buf;
 	unsigned long sz;
 	struct tree_desc desc;
-	unsigned char *rewrite_here;
-	const unsigned char *rewrite_with;
-	unsigned char subtree[20];
+	struct object_id *rewrite_here;
+	const struct object_id *rewrite_with;
+	struct object_id subtree;
 	enum object_type type;
 	int status;
 
@@ -182,9 +180,9 @@ static int splice_tree(const unsigned char *hash1,
 	if (*subpath)
 		subpath++;
 
-	buf = read_sha1_file(hash1, &type, &sz);
+	buf = read_sha1_file(hash1->hash, &type, &sz);
 	if (!buf)
-		die("cannot read tree %s", sha1_to_hex(hash1));
+		die("cannot read tree %s", oid_to_hex(hash1));
 	init_tree_desc(&desc, buf, sz);
 
 	rewrite_here = NULL;
@@ -197,26 +195,26 @@ static int splice_tree(const unsigned char *hash1,
 		if (strlen(name) == toplen &&
 		    !memcmp(name, prefix, toplen)) {
 			if (!S_ISDIR(mode))
-				die("entry %s in tree %s is not a tree",
-				    name, sha1_to_hex(hash1));
-			rewrite_here = (unsigned char *) oid->hash;
+				die("entry %s in tree %s is not a tree", name,
+				    oid_to_hex(hash1));
+			rewrite_here = (struct object_id *)oid;
 			break;
 		}
 		update_tree_entry(&desc);
 	}
 	if (!rewrite_here)
-		die("entry %.*s not found in tree %s",
-		    toplen, prefix, sha1_to_hex(hash1));
+		die("entry %.*s not found in tree %s", toplen, prefix,
+		    oid_to_hex(hash1));
 	if (*subpath) {
-		status = splice_tree(rewrite_here, subpath, hash2, subtree);
+		status = splice_tree(rewrite_here, subpath, hash2, &subtree);
 		if (status)
 			return status;
-		rewrite_with = subtree;
-	}
-	else
+		rewrite_with = &subtree;
+	} else {
 		rewrite_with = hash2;
-	hashcpy(rewrite_here, rewrite_with);
-	status = write_sha1_file(buf, sz, tree_type, result);
+	}
+	oidcpy(rewrite_here, rewrite_with);
+	status = write_sha1_file(buf, sz, tree_type, result->hash);
 	free(buf);
 	return status;
 }
@@ -280,7 +278,7 @@ void shift_tree(const struct object_id *hash1,
 	if (!*add_prefix)
 		return;
 
-	splice_tree(hash1->hash, add_prefix, hash2->hash, shifted->hash);
+	splice_tree(hash1, add_prefix, hash2, shifted);
 }
 
 /*
@@ -334,7 +332,7 @@ void shift_tree_by(const struct object_id *hash1,
 		 * shift tree2 down by adding shift_prefix above it
 		 * to match tree1.
 		 */
-		splice_tree(hash1->hash, shift_prefix, hash2->hash, shifted->hash);
+		splice_tree(hash1, shift_prefix, hash2, shifted);
 	else
 		/*
 		 * shift tree2 up by removing shift_prefix from it
-- 
2.14.3

Re: [PATCH v2 07/14] match-trees: convert splice_tree to object_id

[Duy Nguyen]

On Mon, Jan 22, 2018 at 12:04:30PM +0100, Patryk Obara wrote:
> Convert the definition of static recursive splice_tree function to use
> struct object_id and adjust single caller.
> 
> Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
> ---
>  match-trees.c | 42 ++++++++++++++++++++----------------------
>  1 file changed, 20 insertions(+), 22 deletions(-)
> 
> diff --git a/match-trees.c b/match-trees.c
> index 396b7338df..0f899a7212 100644
> --- a/match-trees.c
> +++ b/match-trees.c
> @@ -161,19 +161,17 @@ static void match_trees(const struct object_id *hash1,
>   * A tree "hash1" has a subdirectory at "prefix".  Come up with a
>   * tree object by replacing it with another tree "hash2".
>   */
> -static int splice_tree(const unsigned char *hash1,
> -		       const char *prefix,
> -		       const unsigned char *hash2,
> -		       unsigned char *result)
> +static int splice_tree(const struct object_id *hash1, const char *prefix,
> +		       const struct object_id *hash2, struct object_id *result)

Maybe change the names to oid1 and oid2 too. I had a "what?" moment
when I read hash1->hash below.

> @@ -197,26 +195,26 @@ static int splice_tree(const unsigned char *hash1,
>  		if (strlen(name) == toplen &&
>  		    !memcmp(name, prefix, toplen)) {
>  			if (!S_ISDIR(mode))
> -				die("entry %s in tree %s is not a tree",
> -				    name, sha1_to_hex(hash1));
> -			rewrite_here = (unsigned char *) oid->hash;
> +				die("entry %s in tree %s is not a tree", name,
> +				    oid_to_hex(hash1));
> +			rewrite_here = (struct object_id *)oid;

You don't need the typecast here anymore, do you?

--
Duy

Re: [PATCH v2 07/14] match-trees: convert splice_tree to object_id

[Patryk Obara]

On 22 January 2018 at 12:56, Duy Nguyen <pclouds@gmail.com> wrote:
> On Mon, Jan 22, 2018 at 12:04:30PM +0100, Patryk Obara wrote:
>> Convert the definition of static recursive splice_tree function to use
>> struct object_id and adjust single caller.
>>
>> Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
>> ---
>>  match-trees.c | 42 ++++++++++++++++++++----------------------
>>  1 file changed, 20 insertions(+), 22 deletions(-)
>>
>> diff --git a/match-trees.c b/match-trees.c
>> index 396b7338df..0f899a7212 100644
>> --- a/match-trees.c
>> +++ b/match-trees.c
>> @@ -161,19 +161,17 @@ static void match_trees(const struct object_id *hash1,
>>   * A tree "hash1" has a subdirectory at "prefix".  Come up with a
>>   * tree object by replacing it with another tree "hash2".
>>   */
>> -static int splice_tree(const unsigned char *hash1,
>> -                    const char *prefix,
>> -                    const unsigned char *hash2,
>> -                    unsigned char *result)
>> +static int splice_tree(const struct object_id *hash1, const char *prefix,
>> +                    const struct object_id *hash2, struct object_id *result)
>
> Maybe change the names to oid1 and oid2 too. I had a "what?" moment
> when I read hash1->hash below.

OK

>> @@ -197,26 +195,26 @@ static int splice_tree(const unsigned char *hash1,
>>               if (strlen(name) == toplen &&
>>                   !memcmp(name, prefix, toplen)) {
>>                       if (!S_ISDIR(mode))
>> -                             die("entry %s in tree %s is not a tree",
>> -                                 name, sha1_to_hex(hash1));
>> -                     rewrite_here = (unsigned char *) oid->hash;
>> +                             die("entry %s in tree %s is not a tree", name,
>> +                                 oid_to_hex(hash1));
>> +                     rewrite_here = (struct object_id *)oid;
>
> You don't need the typecast here anymore, do you?

Unfortunately, I do :(

Few lines above:
192: const struct object_id *oid;
194: oid = tree_entry_extract(&desc, &name, &mode);

Function tree_entry_extract returns const pointer, which leads to
compiler warning:
"assigning to 'struct object_id *' from 'const struct object_id *'
discards qualifiers".

On the other hand, if I change const qualifier for 'rewrite_here'
variable - warning will
appear in line 216:

216: oidcpy(rewrite_here, rewrite_with);

So the question here is rather: is it ok to overwrite buffer returned
by tree_entry_extract?

When writing this I opted to preserve cv-qualifiers despite changing
pointer type (which
implied preservation of typecast) - partly because parameter 'desc' of
tree_entry_extract
is NOT const (which suggests to me, that it's ok).

But this cast might be indication of unintended modification inside
tree description
structure and might lead to an error is some other place, if there's
an assumption, that
this buffer is not overwritable.

Maybe const should be removed from return type of tree_entry_extract (and maybe
from oid field of struct name_entry)?

I will give it some more thought - maybe oidcpy from line 216 could be replaced.

-- 
| ← Ceci n'est pas une pipe
Patryk Obara

Re: [PATCH v2 07/14] match-trees: convert splice_tree to object_id

[Duy Nguyen]

On Mon, Jan 22, 2018 at 02:12:56PM +0100, Patryk Obara wrote:
> >> @@ -197,26 +195,26 @@ static int splice_tree(const unsigned char *hash1,
> >>               if (strlen(name) == toplen &&
> >>                   !memcmp(name, prefix, toplen)) {
> >>                       if (!S_ISDIR(mode))
> >> -                             die("entry %s in tree %s is not a tree",
> >> -                                 name, sha1_to_hex(hash1));
> >> -                     rewrite_here = (unsigned char *) oid->hash;
> >> +                             die("entry %s in tree %s is not a tree", name,
> >> +                                 oid_to_hex(hash1));
> >> +                     rewrite_here = (struct object_id *)oid;
> >
> > You don't need the typecast here anymore, do you?
> 
> Unfortunately, I do :(
> 
> Few lines above:
> 192: const struct object_id *oid;
> 194: oid = tree_entry_extract(&desc, &name, &mode);
> 
> Function tree_entry_extract returns const pointer, which leads to
> compiler warning:
> "assigning to 'struct object_id *' from 'const struct object_id *'
> discards qualifiers".
> 
> On the other hand, if I change const qualifier for 'rewrite_here'
> variable - warning will
> appear in line 216:
> 
> 216: oidcpy(rewrite_here, rewrite_with);
> 
> So the question here is rather: is it ok to overwrite buffer returned
> by tree_entry_extract?
> 
> When writing this I opted to preserve cv-qualifiers despite changing
> pointer type (which implied preservation of typecast) - partly
> because parameter 'desc' of tree_entry_extract is NOT const (which
> suggests to me, that it's ok).
> 
> But this cast might be indication of unintended modification inside
> tree description structure and might lead to an error is some other
> place, if there's an assumption, that this buffer is not
> overwritable.
> 
> Maybe const should be removed from return type of tree_entry_extract
> (and maybe from oid field of struct name_entry)?
>
> I will give it some more thought - maybe oidcpy from line 216 could
> be replaced.

I've read this code a bit more (sorry I didn't see the "const struct
object_id *oid" line when I read this patch). I think the typecast is
very much on purpose. Junio wanted to make a new tree with one
different hash in 68faf68938 (A new merge stragety 'subtree'. -
2007-02-15) but I think he kinda abused the tree walker for this
task.

A cleaner way is create a new tree by copying unmodified entries and
replacing just one entry. I think the old way was ok when we dealt
with SHA-1 directly, but with the object_id abstraction in place, this
kind of update looks iffy.

Alternatively, perhaps we can do something like this to keep tree
manipulation in tree-walk.c, one of the two places that know about
tree object on-disk format (the other one is cache-tree.c)

-- 8< --
diff --git a/match-trees.c b/match-trees.c
index 396b7338df..a8dc8a53d9 100644
--- a/match-trees.c
+++ b/match-trees.c
@@ -171,7 +171,7 @@ static int splice_tree(const unsigned char *hash1,
 	char *buf;
 	unsigned long sz;
 	struct tree_desc desc;
-	unsigned char *rewrite_here;
+	const object_id *rewrite_here;
 	const unsigned char *rewrite_with;
 	unsigned char subtree[20];
 	enum object_type type;
@@ -199,7 +199,7 @@ static int splice_tree(const unsigned char *hash1,
 			if (!S_ISDIR(mode))
 				die("entry %s in tree %s is not a tree",
 				    name, sha1_to_hex(hash1));
-			rewrite_here = (unsigned char *) oid->hash;
+			rewrite_here = oid->hash;
 			break;
 		}
 		update_tree_entry(&desc);
@@ -215,7 +215,7 @@ static int splice_tree(const unsigned char *hash1,
 	}
 	else
 		rewrite_with = hash2;
-	hashcpy(rewrite_here, rewrite_with);
+	replace_tree_entry_hash(&desc, rewrite_with, buf, sz);
 	status = write_sha1_file(buf, sz, tree_type, result);
 	free(buf);
 	return status;
diff --git a/tree-walk.c b/tree-walk.c
index 63a87ed666..f31a03569f 100644
--- a/tree-walk.c
+++ b/tree-walk.c
@@ -164,6 +164,17 @@ int tree_entry_gently(struct tree_desc *desc, struct name_entry *entry)
 	return 1;
 }
 
+void replace_tree_entry_hash(struct tree_desc *desc,
+			     const unsigned char *sha1,
+			     char *buf, unsigned long size)
+{
+	unsigned long offset = (const char *)desc->buffer - buf;
+	unsigned char *to_update;
+
+	to_update = (unsigned char *)buf + offset + tree_entry_len(&desc->entry);
+	hashcpy(to_update, sha1);
+}
+
 void setup_traverse_info(struct traverse_info *info, const char *base)
 {
 	int pathlen = strlen(base);
diff --git a/tree-walk.h b/tree-walk.h
index b6bd1b4ccf..9a7d133d68 100644
--- a/tree-walk.h
+++ b/tree-walk.h
@@ -35,6 +35,9 @@ int update_tree_entry_gently(struct tree_desc *);
 void init_tree_desc(struct tree_desc *desc, const void *buf, unsigned long size);
 int init_tree_desc_gently(struct tree_desc *desc, const void *buf, unsigned long size);
 
+void replace_tree_entry_hash(struct tree_desc *desc,
+			     const unsigned char *sha1,
+			     char *buf, unsigned long size);
 /*
  * Helper function that does both tree_entry_extract() and update_tree_entry()
  * and returns true for success
-- 8< --

[PATCH v2 08/14] commit: convert commit_tree* to object_id

[Patryk Obara]

Convert the definitions and declarations of commit_tree and
commit_tree_extended to use struct object_id and adjust all usages of
these functions.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 builtin/am.c          |  4 ++--
 builtin/commit-tree.c |  4 ++--
 builtin/commit.c      |  5 +++--
 builtin/merge.c       |  8 ++++----
 commit.c              | 15 +++++++--------
 commit.h              | 11 ++++++-----
 notes-cache.c         |  4 ++--
 notes-merge.c         |  9 ++++-----
 notes-utils.c         |  7 ++++---
 notes-utils.h         |  3 ++-
 10 files changed, 36 insertions(+), 34 deletions(-)

diff --git a/builtin/am.c b/builtin/am.c
index acfe9d3c8c..6e6abb05cd 100644
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -1641,8 +1641,8 @@ static void do_commit(const struct am_state *state)
 		setenv("GIT_COMMITTER_DATE",
 			state->ignore_date ? "" : state->author_date, 1);
 
-	if (commit_tree(state->msg, state->msg_len, tree.hash, parents, commit.hash,
-				author, state->sign_commit))
+	if (commit_tree(state->msg, state->msg_len, &tree, parents, &commit,
+			author, state->sign_commit))
 		die(_("failed to write commit object"));
 
 	reflog_msg = getenv("GIT_REFLOG_ACTION");
diff --git a/builtin/commit-tree.c b/builtin/commit-tree.c
index 2177251e24..e5bdf57b1e 100644
--- a/builtin/commit-tree.c
+++ b/builtin/commit-tree.c
@@ -117,8 +117,8 @@ int cmd_commit_tree(int argc, const char **argv, const char *prefix)
 			die_errno("git commit-tree: failed to read");
 	}
 
-	if (commit_tree(buffer.buf, buffer.len, tree_oid.hash, parents,
-			commit_oid.hash, NULL, sign_commit)) {
+	if (commit_tree(buffer.buf, buffer.len, &tree_oid, parents, &commit_oid,
+			NULL, sign_commit)) {
 		strbuf_release(&buffer);
 		return 1;
 	}
diff --git a/builtin/commit.c b/builtin/commit.c
index 8a87701414..c14878302e 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -1792,8 +1792,9 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
 		append_merge_tag_headers(parents, &tail);
 	}
 
-	if (commit_tree_extended(sb.buf, sb.len, active_cache_tree->oid.hash,
-			 parents, oid.hash, author_ident.buf, sign_commit, extra)) {
+	if (commit_tree_extended(sb.buf, sb.len, &active_cache_tree->oid,
+				 parents, &oid, author_ident.buf, sign_commit,
+				 extra)) {
 		rollback_index_files();
 		die(_("failed to write commit object"));
 	}
diff --git a/builtin/merge.c b/builtin/merge.c
index 30264cfd7c..92ba99a1a5 100644
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -820,8 +820,8 @@ static int merge_trivial(struct commit *head, struct commit_list *remoteheads)
 	pptr = commit_list_append(head, pptr);
 	pptr = commit_list_append(remoteheads->item, pptr);
 	prepare_to_commit(remoteheads);
-	if (commit_tree(merge_msg.buf, merge_msg.len, result_tree.hash, parents,
-			result_commit.hash, NULL, sign_commit))
+	if (commit_tree(merge_msg.buf, merge_msg.len, &result_tree, parents,
+			&result_commit, NULL, sign_commit))
 		die(_("failed to write commit object"));
 	finish(head, remoteheads, &result_commit, "In-index merge");
 	drop_save();
@@ -845,8 +845,8 @@ static int finish_automerge(struct commit *head,
 		commit_list_insert(head, &parents);
 	strbuf_addch(&merge_msg, '\n');
 	prepare_to_commit(remoteheads);
-	if (commit_tree(merge_msg.buf, merge_msg.len, result_tree->hash, parents,
-			result_commit.hash, NULL, sign_commit))
+	if (commit_tree(merge_msg.buf, merge_msg.len, result_tree, parents,
+			&result_commit, NULL, sign_commit))
 		die(_("failed to write commit object"));
 	strbuf_addf(&buf, "Merge made by the '%s' strategy.", wt_strategy);
 	finish(head, remoteheads, &result_commit, buf.buf);
diff --git a/commit.c b/commit.c
index cab8d4455b..760137e54b 100644
--- a/commit.c
+++ b/commit.c
@@ -1395,9 +1395,8 @@ void free_commit_extra_headers(struct commit_extra_header *extra)
 	}
 }
 
-int commit_tree(const char *msg, size_t msg_len,
-		const unsigned char *tree,
-		struct commit_list *parents, unsigned char *ret,
+int commit_tree(const char *msg, size_t msg_len, const struct object_id *tree,
+		struct commit_list *parents, struct object_id *ret,
 		const char *author, const char *sign_commit)
 {
 	struct commit_extra_header *extra = NULL, **tail = &extra;
@@ -1526,8 +1525,8 @@ N_("Warning: commit message did not conform to UTF-8.\n"
    "variable i18n.commitencoding to the encoding your project uses.\n");
 
 int commit_tree_extended(const char *msg, size_t msg_len,
-			 const unsigned char *tree,
-			 struct commit_list *parents, unsigned char *ret,
+			 const struct object_id *tree,
+			 struct commit_list *parents, struct object_id *ret,
 			 const char *author, const char *sign_commit,
 			 struct commit_extra_header *extra)
 {
@@ -1535,7 +1534,7 @@ int commit_tree_extended(const char *msg, size_t msg_len,
 	int encoding_is_utf8;
 	struct strbuf buffer;
 
-	assert_sha1_type(tree, OBJ_TREE);
+	assert_sha1_type(tree->hash, OBJ_TREE);
 
 	if (memchr(msg, '\0', msg_len))
 		return error("a NUL byte in commit log message not allowed.");
@@ -1544,7 +1543,7 @@ int commit_tree_extended(const char *msg, size_t msg_len,
 	encoding_is_utf8 = is_encoding_utf8(git_commit_encoding);
 
 	strbuf_init(&buffer, 8192); /* should avoid reallocs for the headers */
-	strbuf_addf(&buffer, "tree %s\n", sha1_to_hex(tree));
+	strbuf_addf(&buffer, "tree %s\n", oid_to_hex(tree));
 
 	/*
 	 * NOTE! This ordering means that the same exact tree merged with a
@@ -1583,7 +1582,7 @@ int commit_tree_extended(const char *msg, size_t msg_len,
 		goto out;
 	}
 
-	result = write_sha1_file(buffer.buf, buffer.len, commit_type, ret);
+	result = write_sha1_file(buffer.buf, buffer.len, commit_type, ret->hash);
 out:
 	strbuf_release(&buffer);
 	return result;
diff --git a/commit.h b/commit.h
index 8c68ca1a5a..5dd9df4448 100644
--- a/commit.h
+++ b/commit.h
@@ -263,14 +263,15 @@ extern void append_merge_tag_headers(struct commit_list *parents,
 				     struct commit_extra_header ***tail);
 
 extern int commit_tree(const char *msg, size_t msg_len,
-		       const unsigned char *tree,
-		       struct commit_list *parents, unsigned char *ret,
+		       const struct object_id *tree,
+		       struct commit_list *parents, struct object_id *ret,
 		       const char *author, const char *sign_commit);
 
 extern int commit_tree_extended(const char *msg, size_t msg_len,
-				const unsigned char *tree,
-				struct commit_list *parents, unsigned char *ret,
-				const char *author, const char *sign_commit,
+				const struct object_id *tree,
+				struct commit_list *parents,
+				struct object_id *ret, const char *author,
+				const char *sign_commit,
 				struct commit_extra_header *);
 
 extern struct commit_extra_header *read_commit_extra_headers(struct commit *, const char **);
diff --git a/notes-cache.c b/notes-cache.c
index 17ee8602b3..d2f87147cc 100644
--- a/notes-cache.c
+++ b/notes-cache.c
@@ -56,8 +56,8 @@ int notes_cache_write(struct notes_cache *c)
 
 	if (write_notes_tree(&c->tree, tree_oid.hash))
 		return -1;
-	if (commit_tree(c->validity, strlen(c->validity), tree_oid.hash, NULL,
-			commit_oid.hash, NULL, NULL) < 0)
+	if (commit_tree(c->validity, strlen(c->validity), &tree_oid, NULL,
+			&commit_oid, NULL, NULL) < 0)
 		return -1;
 	if (update_ref("update notes cache", c->tree.update_ref, &commit_oid,
 		       NULL, 0, UPDATE_REFS_QUIET_ON_ERR) < 0)
diff --git a/notes-merge.c b/notes-merge.c
index 0f6573cb17..c09c5e0e47 100644
--- a/notes-merge.c
+++ b/notes-merge.c
@@ -642,9 +642,8 @@ int notes_merge(struct notes_merge_options *o,
 		struct commit_list *parents = NULL;
 		commit_list_insert(remote, &parents); /* LIFO order */
 		commit_list_insert(local, &parents);
-		create_notes_commit(local_tree, parents,
-				    o->commit_msg.buf, o->commit_msg.len,
-				    result_oid->hash);
+		create_notes_commit(local_tree, parents, o->commit_msg.buf,
+				    o->commit_msg.len, result_oid);
 	}
 
 found_result:
@@ -718,8 +717,8 @@ int notes_merge_commit(struct notes_merge_options *o,
 		strbuf_setlen(&path, baselen);
 	}
 
-	create_notes_commit(partial_tree, partial_commit->parents,
-			    msg, strlen(msg), result_oid->hash);
+	create_notes_commit(partial_tree, partial_commit->parents, msg,
+			    strlen(msg), result_oid);
 	unuse_commit_buffer(partial_commit, buffer);
 	if (o->verbosity >= 4)
 		printf("Finalized notes merge commit: %s\n",
diff --git a/notes-utils.c b/notes-utils.c
index 5c8e70c98f..058c642dac 100644
--- a/notes-utils.c
+++ b/notes-utils.c
@@ -6,7 +6,7 @@
 
 void create_notes_commit(struct notes_tree *t, struct commit_list *parents,
 			 const char *msg, size_t msg_len,
-			 unsigned char *result_sha1)
+			 struct object_id *result_oid)
 {
 	struct object_id tree_oid;
 
@@ -27,7 +27,8 @@ void create_notes_commit(struct notes_tree *t, struct commit_list *parents,
 		/* else: t->ref points to nothing, assume root/orphan commit */
 	}
 
-	if (commit_tree(msg, msg_len, tree_oid.hash, parents, result_sha1, NULL, NULL))
+	if (commit_tree(msg, msg_len, &tree_oid, parents, result_oid, NULL,
+			NULL))
 		die("Failed to commit notes tree to database");
 }
 
@@ -47,7 +48,7 @@ void commit_notes(struct notes_tree *t, const char *msg)
 	strbuf_addstr(&buf, msg);
 	strbuf_complete_line(&buf);
 
-	create_notes_commit(t, NULL, buf.buf, buf.len, commit_oid.hash);
+	create_notes_commit(t, NULL, buf.buf, buf.len, &commit_oid);
 	strbuf_insert(&buf, 0, "notes: ", 7); /* commit message starts at index 7 */
 	update_ref(buf.buf, t->update_ref, &commit_oid, NULL, 0,
 		   UPDATE_REFS_DIE_ON_ERR);
diff --git a/notes-utils.h b/notes-utils.h
index 1190578398..5d79cbef51 100644
--- a/notes-utils.h
+++ b/notes-utils.h
@@ -15,7 +15,8 @@
  * The resulting commit SHA1 is stored in result_sha1.
  */
 void create_notes_commit(struct notes_tree *t, struct commit_list *parents,
-			 const char *msg, size_t msg_len, unsigned char *result_sha1);
+			 const char *msg, size_t msg_len,
+			 struct object_id *result_oid);
 
 void commit_notes(struct notes_tree *t, const char *msg);
 
-- 
2.14.3

[PATCH v2 09/14] notes: convert combine_notes_* to object_id

[Patryk Obara]

Convert the definition and declarations of combine_notes_* functions
to struct object_id and adjust usage of these functions.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 notes.c | 46 +++++++++++++++++++++++-----------------------
 notes.h | 25 +++++++++++++++----------
 2 files changed, 38 insertions(+), 33 deletions(-)

diff --git a/notes.c b/notes.c
index c7f21fae44..3f4f94507a 100644
--- a/notes.c
+++ b/notes.c
@@ -270,8 +270,8 @@ static int note_tree_insert(struct notes_tree *t, struct int_node *tree,
 				if (!oidcmp(&l->val_oid, &entry->val_oid))
 					return 0;
 
-				ret = combine_notes(l->val_oid.hash,
-						    entry->val_oid.hash);
+				ret = combine_notes(&l->val_oid,
+						    &entry->val_oid);
 				if (!ret && is_null_oid(&l->val_oid))
 					note_tree_remove(t, tree, n, entry);
 				free(entry);
@@ -786,8 +786,8 @@ static int prune_notes_helper(const struct object_id *object_oid,
 	return 0;
 }
 
-int combine_notes_concatenate(unsigned char *cur_sha1,
-		const unsigned char *new_sha1)
+int combine_notes_concatenate(struct object_id *cur_oid,
+			      const struct object_id *new_oid)
 {
 	char *cur_msg = NULL, *new_msg = NULL, *buf;
 	unsigned long cur_len, new_len, buf_len;
@@ -795,18 +795,18 @@ int combine_notes_concatenate(unsigned char *cur_sha1,
 	int ret;
 
 	/* read in both note blob objects */
-	if (!is_null_sha1(new_sha1))
-		new_msg = read_sha1_file(new_sha1, &new_type, &new_len);
+	if (!is_null_oid(new_oid))
+		new_msg = read_sha1_file(new_oid->hash, &new_type, &new_len);
 	if (!new_msg || !new_len || new_type != OBJ_BLOB) {
 		free(new_msg);
 		return 0;
 	}
-	if (!is_null_sha1(cur_sha1))
-		cur_msg = read_sha1_file(cur_sha1, &cur_type, &cur_len);
+	if (!is_null_oid(cur_oid))
+		cur_msg = read_sha1_file(cur_oid->hash, &cur_type, &cur_len);
 	if (!cur_msg || !cur_len || cur_type != OBJ_BLOB) {
 		free(cur_msg);
 		free(new_msg);
-		hashcpy(cur_sha1, new_sha1);
+		oidcpy(cur_oid, new_oid);
 		return 0;
 	}
 
@@ -825,20 +825,20 @@ int combine_notes_concatenate(unsigned char *cur_sha1,
 	free(new_msg);
 
 	/* create a new blob object from buf */
-	ret = write_sha1_file(buf, buf_len, blob_type, cur_sha1);
+	ret = write_sha1_file(buf, buf_len, blob_type, cur_oid->hash);
 	free(buf);
 	return ret;
 }
 
-int combine_notes_overwrite(unsigned char *cur_sha1,
-		const unsigned char *new_sha1)
+int combine_notes_overwrite(struct object_id *cur_oid,
+			    const struct object_id *new_oid)
 {
-	hashcpy(cur_sha1, new_sha1);
+	oidcpy(cur_oid, new_oid);
 	return 0;
 }
 
-int combine_notes_ignore(unsigned char *cur_sha1,
-		const unsigned char *new_sha1)
+int combine_notes_ignore(struct object_id *cur_oid,
+			 const struct object_id *new_oid)
 {
 	return 0;
 }
@@ -848,17 +848,17 @@ int combine_notes_ignore(unsigned char *cur_sha1,
  * newlines removed.
  */
 static int string_list_add_note_lines(struct string_list *list,
-				      const unsigned char *sha1)
+				      const struct object_id *oid)
 {
 	char *data;
 	unsigned long len;
 	enum object_type t;
 
-	if (is_null_sha1(sha1))
+	if (is_null_oid(oid))
 		return 0;
 
 	/* read_sha1_file NUL-terminates */
-	data = read_sha1_file(sha1, &t, &len);
+	data = read_sha1_file(oid->hash, &t, &len);
 	if (t != OBJ_BLOB || !data || !len) {
 		free(data);
 		return t != OBJ_BLOB || !data;
@@ -884,17 +884,17 @@ static int string_list_join_lines_helper(struct string_list_item *item,
 	return 0;
 }
 
-int combine_notes_cat_sort_uniq(unsigned char *cur_sha1,
-		const unsigned char *new_sha1)
+int combine_notes_cat_sort_uniq(struct object_id *cur_oid,
+				const struct object_id *new_oid)
 {
 	struct string_list sort_uniq_list = STRING_LIST_INIT_DUP;
 	struct strbuf buf = STRBUF_INIT;
 	int ret = 1;
 
 	/* read both note blob objects into unique_lines */
-	if (string_list_add_note_lines(&sort_uniq_list, cur_sha1))
+	if (string_list_add_note_lines(&sort_uniq_list, cur_oid))
 		goto out;
-	if (string_list_add_note_lines(&sort_uniq_list, new_sha1))
+	if (string_list_add_note_lines(&sort_uniq_list, new_oid))
 		goto out;
 	string_list_remove_empty_items(&sort_uniq_list, 0);
 	string_list_sort(&sort_uniq_list);
@@ -905,7 +905,7 @@ int combine_notes_cat_sort_uniq(unsigned char *cur_sha1,
 				 string_list_join_lines_helper, &buf))
 		goto out;
 
-	ret = write_sha1_file(buf.buf, buf.len, blob_type, cur_sha1);
+	ret = write_sha1_file(buf.buf, buf.len, blob_type, cur_oid->hash);
 
 out:
 	strbuf_release(&buf);
diff --git a/notes.h b/notes.h
index 3848c2fb3f..88da38b5f4 100644
--- a/notes.h
+++ b/notes.h
@@ -9,27 +9,32 @@
  * When adding a new note annotating the same object as an existing note, it is
  * up to the caller to decide how to combine the two notes. The decision is
  * made by passing in a function of the following form. The function accepts
- * two SHA1s -- of the existing note and the new note, respectively. The
+ * two object_ids -- of the existing note and the new note, respectively. The
  * function then combines the notes in whatever way it sees fit, and writes the
- * resulting SHA1 into the first SHA1 argument (cur_sha1). A non-zero return
+ * resulting oid into the first argument (cur_oid). A non-zero return
  * value indicates failure.
  *
- * The two given SHA1s shall both be non-NULL and different from each other.
- * Either of them (but not both) may be == null_sha1, which indicates an
- * empty/non-existent note. If the resulting SHA1 (cur_sha1) is == null_sha1,
+ * The two given object_ids shall both be non-NULL and different from each
+ * other. Either of them (but not both) may be == null_oid, which indicates an
+ * empty/non-existent note. If the resulting oid (cur_oid) is == null_oid,
  * the note will be removed from the notes tree.
  *
  * The default combine_notes function (you get this when passing NULL) is
  * combine_notes_concatenate(), which appends the contents of the new note to
  * the contents of the existing note.
  */
-typedef int (*combine_notes_fn)(unsigned char *cur_sha1, const unsigned char *new_sha1);
+typedef int (*combine_notes_fn)(struct object_id *cur_oid,
+				const struct object_id *new_oid);
 
 /* Common notes combinators */
-int combine_notes_concatenate(unsigned char *cur_sha1, const unsigned char *new_sha1);
-int combine_notes_overwrite(unsigned char *cur_sha1, const unsigned char *new_sha1);
-int combine_notes_ignore(unsigned char *cur_sha1, const unsigned char *new_sha1);
-int combine_notes_cat_sort_uniq(unsigned char *cur_sha1, const unsigned char *new_sha1);
+int combine_notes_concatenate(struct object_id *cur_oid,
+			      const struct object_id *new_oid);
+int combine_notes_overwrite(struct object_id *cur_oid,
+			    const struct object_id *new_oid);
+int combine_notes_ignore(struct object_id *cur_oid,
+			 const struct object_id *new_oid);
+int combine_notes_cat_sort_uniq(struct object_id *cur_oid,
+				const struct object_id *new_oid);
 
 /*
  * Notes tree object
-- 
2.14.3

[PATCH v2 10/14] notes: convert write_notes_tree to object_id

[Patryk Obara]

Convert the definition and declaration of write_notes_tree to
struct object_id and adjust usage of this function.

Additionally, improve style of small part of this function, as old
formatting made it hard to understand at glance what this part of
code is doing.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 notes-cache.c |  2 +-
 notes-utils.c |  2 +-
 notes.c       | 16 +++++++++-------
 notes.h       |  4 ++--
 4 files changed, 13 insertions(+), 11 deletions(-)

diff --git a/notes-cache.c b/notes-cache.c
index d2f87147cc..010ad236cb 100644
--- a/notes-cache.c
+++ b/notes-cache.c
@@ -54,7 +54,7 @@ int notes_cache_write(struct notes_cache *c)
 	if (!c->tree.dirty)
 		return 0;
 
-	if (write_notes_tree(&c->tree, tree_oid.hash))
+	if (write_notes_tree(&c->tree, &tree_oid))
 		return -1;
 	if (commit_tree(c->validity, strlen(c->validity), &tree_oid, NULL,
 			&commit_oid, NULL, NULL) < 0)
diff --git a/notes-utils.c b/notes-utils.c
index 058c642dac..02407fe2a7 100644
--- a/notes-utils.c
+++ b/notes-utils.c
@@ -12,7 +12,7 @@ void create_notes_commit(struct notes_tree *t, struct commit_list *parents,
 
 	assert(t->initialized);
 
-	if (write_notes_tree(t, tree_oid.hash))
+	if (write_notes_tree(t, &tree_oid))
 		die("Failed to write notes tree to database");
 
 	if (!parents) {
diff --git a/notes.c b/notes.c
index 3f4f94507a..09ef1ce33a 100644
--- a/notes.c
+++ b/notes.c
@@ -1123,11 +1123,12 @@ int for_each_note(struct notes_tree *t, int flags, each_note_fn fn,
 	return for_each_note_helper(t, t->root, 0, 0, flags, fn, cb_data);
 }
 
-int write_notes_tree(struct notes_tree *t, unsigned char *result)
+int write_notes_tree(struct notes_tree *t, struct object_id *result)
 {
 	struct tree_write_stack root;
 	struct write_each_note_data cb_data;
 	int ret;
+	int flags;
 
 	if (!t)
 		t = &default_notes_tree;
@@ -1141,12 +1142,13 @@ int write_notes_tree(struct notes_tree *t, unsigned char *result)
 	cb_data.next_non_note = t->first_non_note;
 
 	/* Write tree objects representing current notes tree */
-	ret = for_each_note(t, FOR_EACH_NOTE_DONT_UNPACK_SUBTREES |
-				FOR_EACH_NOTE_YIELD_SUBTREES,
-			write_each_note, &cb_data) ||
-		write_each_non_note_until(NULL, &cb_data) ||
-		tree_write_stack_finish_subtree(&root) ||
-		write_sha1_file(root.buf.buf, root.buf.len, tree_type, result);
+	flags = FOR_EACH_NOTE_DONT_UNPACK_SUBTREES |
+		FOR_EACH_NOTE_YIELD_SUBTREES;
+	ret = for_each_note(t, flags, write_each_note, &cb_data) ||
+	      write_each_non_note_until(NULL, &cb_data) ||
+	      tree_write_stack_finish_subtree(&root) ||
+	      write_sha1_file(root.buf.buf, root.buf.len, tree_type,
+			      result->hash);
 	strbuf_release(&root.buf);
 	return ret;
 }
diff --git a/notes.h b/notes.h
index 88da38b5f4..0433f45db5 100644
--- a/notes.h
+++ b/notes.h
@@ -217,7 +217,7 @@ int for_each_note(struct notes_tree *t, int flags, each_note_fn fn,
  * Write the given notes_tree structure to the object database
  *
  * Creates a new tree object encapsulating the current state of the given
- * notes_tree, and stores its SHA1 into the 'result' argument.
+ * notes_tree, and stores its object id into the 'result' argument.
  *
  * Returns zero on success, non-zero on failure.
  *
@@ -225,7 +225,7 @@ int for_each_note(struct notes_tree *t, int flags, each_note_fn fn,
  * this function has returned zero. Please also remember to create a
  * corresponding commit object, and update the appropriate notes ref.
  */
-int write_notes_tree(struct notes_tree *t, unsigned char *result);
+int write_notes_tree(struct notes_tree *t, struct object_id *result);
 
 /* Flags controlling the operation of prune */
 #define NOTES_PRUNE_VERBOSE 1
-- 
2.14.3

Re: [PATCH v2 10/14] notes: convert write_notes_tree to object_id

[Duy Nguyen]

On Mon, Jan 22, 2018 at 12:04:33PM +0100, Patryk Obara wrote:
> @@ -1141,12 +1142,13 @@ int write_notes_tree(struct notes_tree *t, unsigned char *result)
>  	cb_data.next_non_note = t->first_non_note;
>  
>  	/* Write tree objects representing current notes tree */
> -	ret = for_each_note(t, FOR_EACH_NOTE_DONT_UNPACK_SUBTREES |
> -				FOR_EACH_NOTE_YIELD_SUBTREES,
> -			write_each_note, &cb_data) ||
> -		write_each_non_note_until(NULL, &cb_data) ||
> -		tree_write_stack_finish_subtree(&root) ||
> -		write_sha1_file(root.buf.buf, root.buf.len, tree_type, result);
> +	flags = FOR_EACH_NOTE_DONT_UNPACK_SUBTREES |
> +		FOR_EACH_NOTE_YIELD_SUBTREES;
> +	ret = for_each_note(t, flags, write_each_note, &cb_data) ||
> +	      write_each_non_note_until(NULL, &cb_data) ||
> +	      tree_write_stack_finish_subtree(&root) ||
> +	      write_sha1_file(root.buf.buf, root.buf.len, tree_type,
> +			      result->hash);

Hmm.. new indentation style. I'm not complaining though. I think it
looks good.

--
Duy

[PATCH v2 11/14] sha1_file: convert write_sha1_file to object_id

[Patryk Obara]

Convert the definition and declaration of write_sha1_file to
struct object_id and adjust usage of this function.

This commit also converts static function write_sha1_file_prepare, as it
is closely related.

Rename these functions to write_object_file and
write_object_file_prepare respectively.

Replace sha1_to_hex, hashcpy and hashclr with their oid equivalents
wherever possible.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 apply.c                  |  8 ++++----
 builtin/checkout.c       |  3 +--
 builtin/mktag.c          |  6 +++---
 builtin/mktree.c         | 10 +++++-----
 builtin/notes.c          |  8 ++++----
 builtin/receive-pack.c   | 11 ++++++-----
 builtin/replace.c        |  2 +-
 builtin/tag.c            |  2 +-
 builtin/unpack-objects.c |  9 ++++++---
 cache-tree.c             |  5 +++--
 cache.h                  |  4 +++-
 commit.c                 |  2 +-
 match-trees.c            |  2 +-
 merge-recursive.c        |  5 +++--
 notes-cache.c            |  2 +-
 notes.c                  |  9 ++++-----
 read-cache.c             |  6 +++---
 sha1_file.c              | 29 +++++++++++++++--------------
 18 files changed, 65 insertions(+), 58 deletions(-)

diff --git a/apply.c b/apply.c
index 57ab8a8a29..4cd4504008 100644
--- a/apply.c
+++ b/apply.c
@@ -3554,7 +3554,7 @@ static int try_threeway(struct apply_state *state,
 
 	/* Preimage the patch was prepared for */
 	if (patch->is_new)
-		write_sha1_file("", 0, blob_type, pre_oid.hash);
+		write_object_file("", 0, blob_type, &pre_oid);
 	else if (get_oid(patch->old_sha1_prefix, &pre_oid) ||
 		 read_blob_object(&buf, &pre_oid, patch->old_mode))
 		return error(_("repository lacks the necessary blob to fall back on 3-way merge."));
@@ -3570,7 +3570,7 @@ static int try_threeway(struct apply_state *state,
 		return -1;
 	}
 	/* post_oid is theirs */
-	write_sha1_file(tmp_image.buf, tmp_image.len, blob_type, post_oid.hash);
+	write_object_file(tmp_image.buf, tmp_image.len, blob_type, &post_oid);
 	clear_image(&tmp_image);
 
 	/* our_oid is ours */
@@ -3583,7 +3583,7 @@ static int try_threeway(struct apply_state *state,
 			return error(_("cannot read the current contents of '%s'"),
 				     patch->old_name);
 	}
-	write_sha1_file(tmp_image.buf, tmp_image.len, blob_type, our_oid.hash);
+	write_object_file(tmp_image.buf, tmp_image.len, blob_type, &our_oid);
 	clear_image(&tmp_image);
 
 	/* in-core three-way merge between post and our using pre as base */
@@ -4291,7 +4291,7 @@ static int add_index_file(struct apply_state *state,
 			}
 			fill_stat_cache_info(ce, &st);
 		}
-		if (write_sha1_file(buf, size, blob_type, ce->oid.hash) < 0) {
+		if (write_object_file(buf, size, blob_type, &ce->oid) < 0) {
 			free(ce);
 			return error(_("unable to create backing store "
 				       "for newly created file %s"), path);
diff --git a/builtin/checkout.c b/builtin/checkout.c
index 8bdc927d3f..ebb6b44660 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -227,8 +227,7 @@ static int checkout_merged(int pos, const struct checkout *state)
 	 * (it also writes the merge result to the object database even
 	 * when it may contain conflicts).
 	 */
-	if (write_sha1_file(result_buf.ptr, result_buf.size,
-			    blob_type, oid.hash))
+	if (write_object_file(result_buf.ptr, result_buf.size, blob_type, &oid))
 		die(_("Unable to add merge result for '%s'"), path);
 	free(result_buf.ptr);
 	ce = make_cache_entry(mode, oid.hash, path, 2, 0);
diff --git a/builtin/mktag.c b/builtin/mktag.c
index 031b750f06..beb552847b 100644
--- a/builtin/mktag.c
+++ b/builtin/mktag.c
@@ -151,7 +151,7 @@ static int verify_tag(char *buffer, unsigned long size)
 int cmd_mktag(int argc, const char **argv, const char *prefix)
 {
 	struct strbuf buf = STRBUF_INIT;
-	unsigned char result_sha1[20];
+	struct object_id result;
 
 	if (argc != 1)
 		usage("git mktag");
@@ -165,10 +165,10 @@ int cmd_mktag(int argc, const char **argv, const char *prefix)
 	if (verify_tag(buf.buf, buf.len) < 0)
 		die("invalid tag signature file");
 
-	if (write_sha1_file(buf.buf, buf.len, tag_type, result_sha1) < 0)
+	if (write_object_file(buf.buf, buf.len, tag_type, &result) < 0)
 		die("unable to write tag file");
 
 	strbuf_release(&buf);
-	printf("%s\n", sha1_to_hex(result_sha1));
+	printf("%s\n", oid_to_hex(&result));
 	return 0;
 }
diff --git a/builtin/mktree.c b/builtin/mktree.c
index da0fd8cd70..8dd9f52f77 100644
--- a/builtin/mktree.c
+++ b/builtin/mktree.c
@@ -40,7 +40,7 @@ static int ent_compare(const void *a_, const void *b_)
 				 b->name, b->len, b->mode);
 }
 
-static void write_tree(unsigned char *sha1)
+static void write_tree(struct object_id *oid)
 {
 	struct strbuf buf;
 	size_t size;
@@ -57,7 +57,7 @@ static void write_tree(unsigned char *sha1)
 		strbuf_add(&buf, ent->sha1, 20);
 	}
 
-	write_sha1_file(buf.buf, buf.len, tree_type, sha1);
+	write_object_file(buf.buf, buf.len, tree_type, oid);
 	strbuf_release(&buf);
 }
 
@@ -142,7 +142,7 @@ static void mktree_line(char *buf, size_t len, int nul_term_line, int allow_miss
 int cmd_mktree(int ac, const char **av, const char *prefix)
 {
 	struct strbuf sb = STRBUF_INIT;
-	unsigned char sha1[20];
+	struct object_id oid;
 	int nul_term_line = 0;
 	int allow_missing = 0;
 	int is_batch_mode = 0;
@@ -181,8 +181,8 @@ int cmd_mktree(int ac, const char **av, const char *prefix)
 			 */
 			; /* skip creating an empty tree */
 		} else {
-			write_tree(sha1);
-			puts(sha1_to_hex(sha1));
+			write_tree(&oid);
+			puts(oid_to_hex(&oid));
 			fflush(stdout);
 		}
 		used=0; /* reset tree entry buffer for re-use in batch mode */
diff --git a/builtin/notes.c b/builtin/notes.c
index 7c81761645..39304ba743 100644
--- a/builtin/notes.c
+++ b/builtin/notes.c
@@ -198,9 +198,9 @@ static void prepare_note_data(const struct object_id *object, struct note_data *
 	}
 }
 
-static void write_note_data(struct note_data *d, unsigned char *sha1)
+static void write_note_data(struct note_data *d, struct object_id *oid)
 {
-	if (write_sha1_file(d->buf.buf, d->buf.len, blob_type, sha1)) {
+	if (write_object_file(d->buf.buf, d->buf.len, blob_type, oid)) {
 		error(_("unable to write note object"));
 		if (d->edit_path)
 			error(_("the note contents have been left in %s"),
@@ -459,7 +459,7 @@ static int add(int argc, const char **argv, const char *prefix)
 
 	prepare_note_data(&object, &d, note ? note->hash : NULL);
 	if (d.buf.len || allow_empty) {
-		write_note_data(&d, new_note.hash);
+		write_note_data(&d, &new_note);
 		if (add_note(t, &object, &new_note, combine_notes_overwrite))
 			die("BUG: combine_notes_overwrite failed");
 		commit_notes(t, "Notes added by 'git notes add'");
@@ -619,7 +619,7 @@ static int append_edit(int argc, const char **argv, const char *prefix)
 	}
 
 	if (d.buf.len || allow_empty) {
-		write_note_data(&d, new_note.hash);
+		write_note_data(&d, &new_note);
 		if (add_note(t, &object, &new_note, combine_notes_overwrite))
 			die("BUG: combine_notes_overwrite failed");
 		logmsg = xstrfmt("Notes added by 'git notes %s'", argv[0]);
diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index b7ce7c7f52..75e7f18ace 100644
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -69,7 +69,7 @@ static int sent_capabilities;
 static int shallow_update;
 static const char *alt_shallow_file;
 static struct strbuf push_cert = STRBUF_INIT;
-static unsigned char push_cert_sha1[20];
+static struct object_id push_cert_oid;
 static struct signature_check sigcheck;
 static const char *push_cert_nonce;
 static const char *cert_nonce_seed;
@@ -633,8 +633,9 @@ static void prepare_push_cert_sha1(struct child_process *proc)
 		int bogs /* beginning_of_gpg_sig */;
 
 		already_done = 1;
-		if (write_sha1_file(push_cert.buf, push_cert.len, "blob", push_cert_sha1))
-			hashclr(push_cert_sha1);
+		if (write_object_file(push_cert.buf, push_cert.len, "blob",
+				      &push_cert_oid))
+			oidclr(&push_cert_oid);
 
 		memset(&sigcheck, '\0', sizeof(sigcheck));
 		sigcheck.result = 'N';
@@ -655,9 +656,9 @@ static void prepare_push_cert_sha1(struct child_process *proc)
 		strbuf_release(&gpg_status);
 		nonce_status = check_nonce(push_cert.buf, bogs);
 	}
-	if (!is_null_sha1(push_cert_sha1)) {
+	if (!is_null_oid(&push_cert_oid)) {
 		argv_array_pushf(&proc->env_array, "GIT_PUSH_CERT=%s",
-				 sha1_to_hex(push_cert_sha1));
+				 oid_to_hex(&push_cert_oid));
 		argv_array_pushf(&proc->env_array, "GIT_PUSH_CERT_SIGNER=%s",
 				 sigcheck.signer ? sigcheck.signer : "");
 		argv_array_pushf(&proc->env_array, "GIT_PUSH_CERT_KEY=%s",
diff --git a/builtin/replace.c b/builtin/replace.c
index 814bf6bfde..83d3235721 100644
--- a/builtin/replace.c
+++ b/builtin/replace.c
@@ -410,7 +410,7 @@ static int create_graft(int argc, const char **argv, int force)
 
 	check_mergetags(commit, argc, argv);
 
-	if (write_sha1_file(buf.buf, buf.len, commit_type, new.hash))
+	if (write_object_file(buf.buf, buf.len, commit_type, &new))
 		die(_("could not write replacement commit for: '%s'"), old_ref);
 
 	strbuf_release(&buf);
diff --git a/builtin/tag.c b/builtin/tag.c
index a7e6a5b0f2..8885e21ddc 100644
--- a/builtin/tag.c
+++ b/builtin/tag.c
@@ -187,7 +187,7 @@ static int build_tag_object(struct strbuf *buf, int sign, struct object_id *resu
 {
 	if (sign && do_sign(buf) < 0)
 		return error(_("unable to sign the tag"));
-	if (write_sha1_file(buf->buf, buf->len, tag_type, result->hash) < 0)
+	if (write_object_file(buf->buf, buf->len, tag_type, result) < 0)
 		return error(_("unable to write tag file"));
 	return 0;
 }
diff --git a/builtin/unpack-objects.c b/builtin/unpack-objects.c
index 85a40d1af7..397371eb3d 100644
--- a/builtin/unpack-objects.c
+++ b/builtin/unpack-objects.c
@@ -172,7 +172,8 @@ static void write_cached_object(struct object *obj, struct obj_buffer *obj_buf)
 {
 	struct object_id oid;
 
-	if (write_sha1_file(obj_buf->buffer, obj_buf->size, typename(obj->type), oid.hash) < 0)
+	if (write_object_file(obj_buf->buffer, obj_buf->size,
+			      typename(obj->type), &oid) < 0)
 		die("failed to write object %s", oid_to_hex(&obj->oid));
 	obj->flags |= FLAG_WRITTEN;
 }
@@ -237,14 +238,16 @@ static void write_object(unsigned nr, enum object_type type,
 			 void *buf, unsigned long size)
 {
 	if (!strict) {
-		if (write_sha1_file(buf, size, typename(type), obj_list[nr].oid.hash) < 0)
+		if (write_object_file(buf, size, typename(type),
+				      &obj_list[nr].oid) < 0)
 			die("failed to write object");
 		added_object(nr, type, buf, size);
 		free(buf);
 		obj_list[nr].obj = NULL;
 	} else if (type == OBJ_BLOB) {
 		struct blob *blob;
-		if (write_sha1_file(buf, size, typename(type), obj_list[nr].oid.hash) < 0)
+		if (write_object_file(buf, size, typename(type),
+				      &obj_list[nr].oid) < 0)
 			die("failed to write object");
 		added_object(nr, type, buf, size);
 		free(buf);
diff --git a/cache-tree.c b/cache-tree.c
index 6574eeb80d..597114f604 100644
--- a/cache-tree.c
+++ b/cache-tree.c
@@ -406,9 +406,10 @@ static int update_one(struct cache_tree *it,
 			oidcpy(&it->oid, &oid);
 		else
 			to_invalidate = 1;
-	} else if (dryrun)
+	} else if (dryrun) {
 		hash_object_file(buffer.buf, buffer.len, tree_type, &it->oid);
-	else if (write_sha1_file(buffer.buf, buffer.len, tree_type, it->oid.hash)) {
+	} else if (write_object_file(buffer.buf, buffer.len, tree_type,
+				     &it->oid)) {
 		strbuf_release(&buffer);
 		return -1;
 	}
diff --git a/cache.h b/cache.h
index d5d78d6a51..d80141eb64 100644
--- a/cache.h
+++ b/cache.h
@@ -1240,7 +1240,9 @@ extern int sha1_object_info(const unsigned char *, unsigned long *);
 extern int hash_object_file(const void *buf, unsigned long len,
 			    const char *type, struct object_id *oid);
 
-extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
+extern int write_object_file(const void *buf, unsigned long len,
+			     const char *type, struct object_id *oid);
+
 extern int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type, struct object_id *oid, unsigned flags);
 
 extern int pretend_object_file(void *, unsigned long, enum object_type,
diff --git a/commit.c b/commit.c
index 760137e54b..c1d840da46 100644
--- a/commit.c
+++ b/commit.c
@@ -1582,7 +1582,7 @@ int commit_tree_extended(const char *msg, size_t msg_len,
 		goto out;
 	}
 
-	result = write_sha1_file(buffer.buf, buffer.len, commit_type, ret->hash);
+	result = write_object_file(buffer.buf, buffer.len, commit_type, ret);
 out:
 	strbuf_release(&buffer);
 	return result;
diff --git a/match-trees.c b/match-trees.c
index 0f899a7212..269bd13338 100644
--- a/match-trees.c
+++ b/match-trees.c
@@ -214,7 +214,7 @@ static int splice_tree(const struct object_id *hash1, const char *prefix,
 		rewrite_with = hash2;
 	}
 	oidcpy(rewrite_here, rewrite_with);
-	status = write_sha1_file(buf, sz, tree_type, result->hash);
+	status = write_object_file(buf, sz, tree_type, result);
 	free(buf);
 	return status;
 }
diff --git a/merge-recursive.c b/merge-recursive.c
index 0fc580d8ca..53a583bb23 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -1009,8 +1009,9 @@ static int merge_file_1(struct merge_options *o,
 			if ((merge_status < 0) || !result_buf.ptr)
 				ret = err(o, _("Failed to execute internal merge"));
 
-			if (!ret && write_sha1_file(result_buf.ptr, result_buf.size,
-						    blob_type, result->oid.hash))
+			if (!ret &&
+			    write_object_file(result_buf.ptr, result_buf.size,
+					      blob_type, &result->oid))
 				ret = err(o, _("Unable to add %s to database"),
 					  a->path);
 
diff --git a/notes-cache.c b/notes-cache.c
index 010ad236cb..398e61d5e9 100644
--- a/notes-cache.c
+++ b/notes-cache.c
@@ -88,7 +88,7 @@ int notes_cache_put(struct notes_cache *c, struct object_id *key_oid,
 {
 	struct object_id value_oid;
 
-	if (write_sha1_file(data, size, "blob", value_oid.hash) < 0)
+	if (write_object_file(data, size, "blob", &value_oid) < 0)
 		return -1;
 	return add_note(&c->tree, key_oid, &value_oid, NULL);
 }
diff --git a/notes.c b/notes.c
index 09ef1ce33a..ce9a8f53f8 100644
--- a/notes.c
+++ b/notes.c
@@ -667,7 +667,7 @@ static int tree_write_stack_finish_subtree(struct tree_write_stack *tws)
 		ret = tree_write_stack_finish_subtree(n);
 		if (ret)
 			return ret;
-		ret = write_sha1_file(n->buf.buf, n->buf.len, tree_type, s.hash);
+		ret = write_object_file(n->buf.buf, n->buf.len, tree_type, &s);
 		if (ret)
 			return ret;
 		strbuf_release(&n->buf);
@@ -825,7 +825,7 @@ int combine_notes_concatenate(struct object_id *cur_oid,
 	free(new_msg);
 
 	/* create a new blob object from buf */
-	ret = write_sha1_file(buf, buf_len, blob_type, cur_oid->hash);
+	ret = write_object_file(buf, buf_len, blob_type, cur_oid);
 	free(buf);
 	return ret;
 }
@@ -905,7 +905,7 @@ int combine_notes_cat_sort_uniq(struct object_id *cur_oid,
 				 string_list_join_lines_helper, &buf))
 		goto out;
 
-	ret = write_sha1_file(buf.buf, buf.len, blob_type, cur_oid->hash);
+	ret = write_object_file(buf.buf, buf.len, blob_type, cur_oid);
 
 out:
 	strbuf_release(&buf);
@@ -1147,8 +1147,7 @@ int write_notes_tree(struct notes_tree *t, struct object_id *result)
 	ret = for_each_note(t, flags, write_each_note, &cb_data) ||
 	      write_each_non_note_until(NULL, &cb_data) ||
 	      tree_write_stack_finish_subtree(&root) ||
-	      write_sha1_file(root.buf.buf, root.buf.len, tree_type,
-			      result->hash);
+	      write_object_file(root.buf.buf, root.buf.len, tree_type, result);
 	strbuf_release(&root.buf);
 	return ret;
 }
diff --git a/read-cache.c b/read-cache.c
index 2eb81a66b9..01bcf7dd84 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -631,10 +631,10 @@ static struct cache_entry *create_alias_ce(struct index_state *istate,
 
 void set_object_name_for_intent_to_add_entry(struct cache_entry *ce)
 {
-	unsigned char sha1[20];
-	if (write_sha1_file("", 0, blob_type, sha1))
+	struct object_id oid;
+	if (write_object_file("", 0, blob_type, &oid))
 		die("cannot create an empty blob in the object database");
-	hashcpy(ce->oid.hash, sha1);
+	oidcpy(&ce->oid, &oid);
 }
 
 int add_to_index(struct index_state *istate, const char *path, struct stat *st, int flags)
diff --git a/sha1_file.c b/sha1_file.c
index 4c44c60cec..d1569b1b96 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1419,9 +1419,9 @@ void *read_object_with_reference(const unsigned char *sha1,
 	}
 }
 
-static void write_sha1_file_prepare(const void *buf, unsigned long len,
-                                    const char *type, unsigned char *sha1,
-                                    char *hdr, int *hdrlen)
+static void write_object_file_prepare(const void *buf, unsigned long len,
+				      const char *type, struct object_id *oid,
+				      char *hdr, int *hdrlen)
 {
 	git_SHA_CTX c;
 
@@ -1432,7 +1432,7 @@ static void write_sha1_file_prepare(const void *buf, unsigned long len,
 	git_SHA1_Init(&c);
 	git_SHA1_Update(&c, hdr, *hdrlen);
 	git_SHA1_Update(&c, buf, len);
-	git_SHA1_Final(sha1, &c);
+	git_SHA1_Final(oid->hash, &c);
 }
 
 /*
@@ -1490,7 +1490,7 @@ int hash_object_file(const void *buf, unsigned long len, const char *type,
 {
 	char hdr[32];
 	int hdrlen = sizeof(hdr);
-	write_sha1_file_prepare(buf, len, type, oid->hash, hdr, &hdrlen);
+	write_object_file_prepare(buf, len, type, oid, hdr, &hdrlen);
 	return 0;
 }
 
@@ -1633,7 +1633,8 @@ static int freshen_packed_object(const unsigned char *sha1)
 	return 1;
 }
 
-int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1)
+int write_object_file(const void *buf, unsigned long len, const char *type,
+		      struct object_id *oid)
 {
 	char hdr[32];
 	int hdrlen = sizeof(hdr);
@@ -1641,10 +1642,10 @@ int write_sha1_file(const void *buf, unsigned long len, const char *type, unsign
 	/* Normally if we have it in the pack then we do not bother writing
 	 * it out into .git/objects/??/?{38} file.
 	 */
-	write_sha1_file_prepare(buf, len, type, sha1, hdr, &hdrlen);
-	if (freshen_packed_object(sha1) || freshen_loose_object(sha1))
+	write_object_file_prepare(buf, len, type, oid, hdr, &hdrlen);
+	if (freshen_packed_object(oid->hash) || freshen_loose_object(oid->hash))
 		return 0;
-	return write_loose_object(sha1, hdr, hdrlen, buf, len, 0);
+	return write_loose_object(oid->hash, hdr, hdrlen, buf, len, 0);
 }
 
 int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type,
@@ -1656,7 +1657,7 @@ int hash_sha1_file_literally(const void *buf, unsigned long len, const char *typ
 	/* type string, SP, %lu of the length plus NUL must fit this */
 	hdrlen = strlen(type) + 32;
 	header = xmalloc(hdrlen);
-	write_sha1_file_prepare(buf, len, type, oid->hash, header, &hdrlen);
+	write_object_file_prepare(buf, len, type, oid, header, &hdrlen);
 
 	if (!(flags & HASH_WRITE_OBJECT))
 		goto cleanup;
@@ -1767,7 +1768,7 @@ static int index_mem(struct object_id *oid, void *buf, size_t size,
 	}
 
 	if (write_object)
-		ret = write_sha1_file(buf, size, typename(type), oid->hash);
+		ret = write_object_file(buf, size, typename(type), oid);
 	else
 		ret = hash_object_file(buf, size, typename(type), oid);
 	if (re_allocated)
@@ -1789,8 +1790,8 @@ static int index_stream_convert_blob(struct object_id *oid, int fd,
 				 get_safe_crlf(flags));
 
 	if (write_object)
-		ret = write_sha1_file(sbuf.buf, sbuf.len, typename(OBJ_BLOB),
-				      oid->hash);
+		ret = write_object_file(sbuf.buf, sbuf.len, typename(OBJ_BLOB),
+					oid);
 	else
 		ret = hash_object_file(sbuf.buf, sbuf.len, typename(OBJ_BLOB),
 				       oid);
@@ -1908,7 +1909,7 @@ int index_path(struct object_id *oid, const char *path, struct stat *st, unsigne
 			return error_errno("readlink(\"%s\")", path);
 		if (!(flags & HASH_WRITE_OBJECT))
 			hash_object_file(sb.buf, sb.len, blob_type, oid);
-		else if (write_sha1_file(sb.buf, sb.len, blob_type, oid->hash))
+		else if (write_object_file(sb.buf, sb.len, blob_type, oid))
 			rc = error("%s: failed to insert into database", path);
 		strbuf_release(&sb);
 		break;
-- 
2.14.3

[PATCH v2 12/14] sha1_file: convert force_object_loose to object_id

[Patryk Obara]

Convert the definition and declaration of force_object_loose to
struct object_id and adjust usage of this function.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 builtin/pack-objects.c |  2 +-
 cache.h                |  3 ++-
 sha1_file.c            | 10 +++++-----
 3 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/builtin/pack-objects.c b/builtin/pack-objects.c
index 6b9cfc289d..f38197543d 100644
--- a/builtin/pack-objects.c
+++ b/builtin/pack-objects.c
@@ -2768,7 +2768,7 @@ static void loosen_unused_packed_objects(struct rev_info *revs)
 			if (!packlist_find(&to_pack, oid.hash, NULL) &&
 			    !has_sha1_pack_kept_or_nonlocal(&oid) &&
 			    !loosened_object_can_be_discarded(&oid, p->mtime))
-				if (force_object_loose(oid.hash, p->mtime))
+				if (force_object_loose(&oid, p->mtime))
 					die("unable to force loose object");
 		}
 	}
diff --git a/cache.h b/cache.h
index d80141eb64..0a8be9c87f 100644
--- a/cache.h
+++ b/cache.h
@@ -1248,7 +1248,8 @@ extern int hash_sha1_file_literally(const void *buf, unsigned long len, const ch
 extern int pretend_object_file(void *, unsigned long, enum object_type,
 			       struct object_id *oid);
 
-extern int force_object_loose(const unsigned char *sha1, time_t mtime);
+extern int force_object_loose(const struct object_id *oid, time_t mtime);
+
 extern int git_open_cloexec(const char *name, int flags);
 #define git_open(name) git_open_cloexec(name, O_RDONLY)
 extern void *map_sha1_file(const unsigned char *sha1, unsigned long *size);
diff --git a/sha1_file.c b/sha1_file.c
index d1569b1b96..d9ee966d74 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1670,7 +1670,7 @@ int hash_sha1_file_literally(const void *buf, unsigned long len, const char *typ
 	return status;
 }
 
-int force_object_loose(const unsigned char *sha1, time_t mtime)
+int force_object_loose(const struct object_id *oid, time_t mtime)
 {
 	void *buf;
 	unsigned long len;
@@ -1679,13 +1679,13 @@ int force_object_loose(const unsigned char *sha1, time_t mtime)
 	int hdrlen;
 	int ret;
 
-	if (has_loose_object(sha1))
+	if (has_loose_object(oid->hash))
 		return 0;
-	buf = read_object(sha1, &type, &len);
+	buf = read_object(oid->hash, &type, &len);
 	if (!buf)
-		return error("cannot read sha1_file for %s", sha1_to_hex(sha1));
+		return error("cannot read sha1_file for %s", oid_to_hex(oid));
 	hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %lu", typename(type), len) + 1;
-	ret = write_loose_object(sha1, hdr, hdrlen, buf, len, mtime);
+	ret = write_loose_object(oid->hash, hdr, hdrlen, buf, len, mtime);
 	free(buf);
 
 	return ret;
-- 
2.14.3

[PATCH v2 13/14] sha1_file: convert write_loose_object to object_id

[Patryk Obara]

Convert the definition and declaration of statis write_loose_object
function to struct object_id.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 sha1_file.c | 28 ++++++++++++++++------------
 1 file changed, 16 insertions(+), 12 deletions(-)

diff --git a/sha1_file.c b/sha1_file.c
index d9ee966d74..59238f5bea 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1548,16 +1548,17 @@ static int create_tmpfile(struct strbuf *tmp, const char *filename)
 	return fd;
 }
 
-static int write_loose_object(const unsigned char *sha1, char *hdr, int hdrlen,
-			      const void *buf, unsigned long len, time_t mtime)
+static int write_loose_object(const struct object_id *oid, char *hdr,
+			      int hdrlen, const void *buf, unsigned long len,
+			      time_t mtime)
 {
 	int fd, ret;
 	unsigned char compressed[4096];
 	git_zstream stream;
 	git_SHA_CTX c;
-	unsigned char parano_sha1[20];
+	struct object_id parano_oid;
 	static struct strbuf tmp_file = STRBUF_INIT;
-	const char *filename = sha1_file_name(sha1);
+	const char *filename = sha1_file_name(oid->hash);
 
 	fd = create_tmpfile(&tmp_file, filename);
 	if (fd < 0) {
@@ -1594,13 +1595,16 @@ static int write_loose_object(const unsigned char *sha1, char *hdr, int hdrlen,
 	} while (ret == Z_OK);
 
 	if (ret != Z_STREAM_END)
-		die("unable to deflate new object %s (%d)", sha1_to_hex(sha1), ret);
+		die("unable to deflate new object %s (%d)", oid_to_hex(oid),
+		    ret);
 	ret = git_deflate_end_gently(&stream);
 	if (ret != Z_OK)
-		die("deflateEnd on object %s failed (%d)", sha1_to_hex(sha1), ret);
-	git_SHA1_Final(parano_sha1, &c);
-	if (hashcmp(sha1, parano_sha1) != 0)
-		die("confused by unstable object source data for %s", sha1_to_hex(sha1));
+		die("deflateEnd on object %s failed (%d)", oid_to_hex(oid),
+		    ret);
+	git_SHA1_Final(parano_oid.hash, &c);
+	if (oidcmp(oid, &parano_oid) != 0)
+		die("confused by unstable object source data for %s",
+		    oid_to_hex(oid));
 
 	close_sha1_file(fd);
 
@@ -1645,7 +1649,7 @@ int write_object_file(const void *buf, unsigned long len, const char *type,
 	write_object_file_prepare(buf, len, type, oid, hdr, &hdrlen);
 	if (freshen_packed_object(oid->hash) || freshen_loose_object(oid->hash))
 		return 0;
-	return write_loose_object(oid->hash, hdr, hdrlen, buf, len, 0);
+	return write_loose_object(oid, hdr, hdrlen, buf, len, 0);
 }
 
 int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type,
@@ -1663,7 +1667,7 @@ int hash_sha1_file_literally(const void *buf, unsigned long len, const char *typ
 		goto cleanup;
 	if (freshen_packed_object(oid->hash) || freshen_loose_object(oid->hash))
 		goto cleanup;
-	status = write_loose_object(oid->hash, header, hdrlen, buf, len, 0);
+	status = write_loose_object(oid, header, hdrlen, buf, len, 0);
 
 cleanup:
 	free(header);
@@ -1685,7 +1689,7 @@ int force_object_loose(const struct object_id *oid, time_t mtime)
 	if (!buf)
 		return error("cannot read sha1_file for %s", oid_to_hex(oid));
 	hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %lu", typename(type), len) + 1;
-	ret = write_loose_object(oid->hash, hdr, hdrlen, buf, len, mtime);
+	ret = write_loose_object(oid, hdr, hdrlen, buf, len, mtime);
 	free(buf);
 
 	return ret;
-- 
2.14.3

[PATCH v2 14/14] sha1_file: rename hash_sha1_file_literally

[Patryk Obara]

This function was already converted to use struct object_id earlier.
---
 builtin/hash-object.c | 3 ++-
 cache.h               | 4 +++-
 sha1_file.c           | 5 +++--
 3 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/builtin/hash-object.c b/builtin/hash-object.c
index c532ff9320..526da5c185 100644
--- a/builtin/hash-object.c
+++ b/builtin/hash-object.c
@@ -24,7 +24,8 @@ static int hash_literally(struct object_id *oid, int fd, const char *type, unsig
 	if (strbuf_read(&buf, fd, 4096) < 0)
 		ret = -1;
 	else
-		ret = hash_sha1_file_literally(buf.buf, buf.len, type, oid, flags);
+		ret = hash_object_file_literally(buf.buf, buf.len, type, oid,
+						 flags);
 	strbuf_release(&buf);
 	return ret;
 }
diff --git a/cache.h b/cache.h
index 0a8be9c87f..6ef4248931 100644
--- a/cache.h
+++ b/cache.h
@@ -1243,7 +1243,9 @@ extern int hash_object_file(const void *buf, unsigned long len,
 extern int write_object_file(const void *buf, unsigned long len,
 			     const char *type, struct object_id *oid);
 
-extern int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type, struct object_id *oid, unsigned flags);
+extern int hash_object_file_literally(const void *buf, unsigned long len,
+				      const char *type, struct object_id *oid,
+				      unsigned flags);
 
 extern int pretend_object_file(void *, unsigned long, enum object_type,
 			       struct object_id *oid);
diff --git a/sha1_file.c b/sha1_file.c
index 59238f5bea..34c041e8cd 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1652,8 +1652,9 @@ int write_object_file(const void *buf, unsigned long len, const char *type,
 	return write_loose_object(oid, hdr, hdrlen, buf, len, 0);
 }
 
-int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type,
-			     struct object_id *oid, unsigned flags)
+int hash_object_file_literally(const void *buf, unsigned long len,
+			       const char *type, struct object_id *oid,
+			       unsigned flags)
 {
 	char *header;
 	int hdrlen, status = 0;
-- 
2.14.3

Re: [PATCH v2 00/14] Some fixes and bunch of object_id conversions

[Duy Nguyen]

On Mon, Jan 22, 2018 at 12:04:23PM +0100, Patryk Obara wrote:
>  sha1_file.c                                   | 100 ++++++++++++++------------

You have started the invasion to sha1_file.c. Victory is near! (*)
2018 will be the year of something-other-shan-sha1 :)

I've read through the series quickly. It looks good. Patches 1 and 2
should be sent separately though.

(*) Technically the hashing part is still easy. I look forward to
seeing you deal with the object reading part, especially from pack
files. It's fun ;-)
--
Duy

Re: [PATCH v2 00/14] Some fixes and bunch of object_id conversions

[Patryk Obara]

> Patches 1 and 2 should be sent separately though.

I hoped they could be piggy-backed, but since there will be v3 of this patch
series... I'll wait for Junio's opinion.

> I look forward to seeing you deal with the object reading part …

Yeah, even reading of loose objects does not work on my test branch yet.

Turns out some functions (*) depend on each other during conversion to oid -
so they are either refactored together in one BIG commit or I need to deploy
some temporary hacks to make it possible to split work into smaller batches.

(*) refactor of sha1_object_info transitively depends on lookup_replace_object
and the other way around. verify_object and verify_tag will also cause some
problems.

-- 
| ← Ceci n'est pas une pipe
Patryk Obara

[PATCH v3 00/14] Some fixes and bunch of object_id conversions

[Patryk Obara]

Compared to v2:

* rebased to latest master

* patch 1 and 2
I kept them in, but if Junio prefers them separately then I'll send
them as separate patches.

* patch 5
- strbuf_add(buf, sha1_to_hex(oid.hash), GIT_SHA1_HEXSZ);
+ strbuf_addstr(buf, oid_to_hex(&oid));

* patch 7
On suggestion from Duy Nguyễn, I renamed parameter names:
'hash1' and 'hash2' with 'oid1' and 'oid2' to avoid e.g. 'hash1->hash'.

I decided *not to* implement suggested replace_tree_entry_hash
function (when implemented as in mail, t6026-merge-subtree fails).
I think this overwriting of object_id needs to be addressed, but
probably at the time of adjusting tree object format for longer hash.

Patryk Obara (14):
  http-push: improve error log
  clang-format: adjust penalty for return type line break
  sha1_file: convert pretend_sha1_file to object_id
  dir: convert struct sha1_stat to use object_id
  sha1_file: convert hash_sha1_file to object_id
  cache: clear whole hash buffer with oidclr
  match-trees: convert splice_tree to object_id
  commit: convert commit_tree* to object_id
  notes: convert combine_notes_* to object_id
  notes: convert write_notes_tree to object_id
  sha1_file: convert write_sha1_file to object_id
  sha1_file: convert force_object_loose to object_id
  sha1_file: convert write_loose_object to object_id
  sha1_file: rename hash_sha1_file_literally

 .clang-format                                 |   2 +-
 Documentation/technical/api-object-access.txt |   2 +-
 apply.c                                       |  12 ++--
 blame.c                                       |   2 +-
 builtin/am.c                                  |   4 +-
 builtin/checkout.c                            |   3 +-
 builtin/commit-tree.c                         |   4 +-
 builtin/commit.c                              |   5 +-
 builtin/hash-object.c                         |   3 +-
 builtin/index-pack.c                          |   5 +-
 builtin/merge.c                               |   8 +--
 builtin/mktag.c                               |   6 +-
 builtin/mktree.c                              |  10 +--
 builtin/notes.c                               |   8 +--
 builtin/pack-objects.c                        |   2 +-
 builtin/receive-pack.c                        |  11 +--
 builtin/replace.c                             |   4 +-
 builtin/tag.c                                 |   2 +-
 builtin/unpack-objects.c                      |  11 +--
 cache-tree.c                                  |  16 ++---
 cache.h                                       |  25 ++++---
 commit.c                                      |  15 ++--
 commit.h                                      |  11 +--
 convert.c                                     |   6 +-
 diffcore-rename.c                             |   4 +-
 dir.c                                         |  56 +++++++--------
 dir.h                                         |  12 ++--
 http-push.c                                   |   4 ++
 log-tree.c                                    |   2 +-
 match-trees.c                                 |  46 ++++++------
 merge-recursive.c                             |   5 +-
 notes-cache.c                                 |   8 +--
 notes-merge.c                                 |   9 ++-
 notes-utils.c                                 |   9 +--
 notes-utils.h                                 |   3 +-
 notes.c                                       |  63 ++++++++--------
 notes.h                                       |  29 ++++----
 read-cache.c                                  |   6 +-
 sha1_file.c                                   | 100 ++++++++++++++------------
 t/helper/test-dump-untracked-cache.c          |   4 +-
 40 files changed, 281 insertions(+), 256 deletions(-)


base-commit: 5be1f00a9a701532232f57958efab4be8c959a29
-- 
2.14.3

[PATCH v3 01/14] http-push: improve error log

[Patryk Obara]

When git push fails due to server-side WebDAV error, it's not easy to
point to the main culprit.  Additional information about exact cURL
error and HTTP server response is helpful for debugging purpose.

New error log helped me pinpoint failing test t5540-http-push-webdav
to a missing Apache dependency in Fedora 27:
https://bugzilla.redhat.com/show_bug.cgi?id=1491151

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 http-push.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/http-push.c b/http-push.c
index 14435ab65d..0913f8ab86 100644
--- a/http-push.c
+++ b/http-push.c
@@ -915,6 +915,10 @@ static struct remote_lock *lock_remote(const char *path, long timeout)
 				lock->timeout = -1;
 			}
 			XML_ParserFree(parser);
+		} else {
+			fprintf(stderr,
+				"error: curl result=%d, HTTP code=%ld\n",
+				results.curl_result, results.http_code);
 		}
 	} else {
 		fprintf(stderr, "Unable to start LOCK request\n");
-- 
2.14.3

[PATCH v3 02/14] clang-format: adjust penalty for return type line break

[Patryk Obara]

The penalty of 5 makes clang-format very eager to put even short type
declarations (e.g. "extern int") into a separate line, even when
breaking parameters list is sufficient.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 .clang-format | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.clang-format b/.clang-format
index 611ab4750b..12a89f95f9 100644
--- a/.clang-format
+++ b/.clang-format
@@ -163,7 +163,7 @@ PenaltyBreakComment: 10
 PenaltyBreakFirstLessLess: 0
 PenaltyBreakString: 10
 PenaltyExcessCharacter: 100
-PenaltyReturnTypeOnItsOwnLine: 5
+PenaltyReturnTypeOnItsOwnLine: 60
 
 # Don't sort #include's
 SortIncludes: false
-- 
2.14.3

[PATCH v3 03/14] sha1_file: convert pretend_sha1_file to object_id

[Patryk Obara]

Convert the declaration and definition of pretend_sha1_file to use
struct object_id and adjust all usages of this function.  Rename it to
pretend_object_file.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 Documentation/technical/api-object-access.txt |  2 +-
 blame.c                                       |  2 +-
 cache.h                                       |  5 ++++-
 sha1_file.c                                   | 10 +++++-----
 4 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/Documentation/technical/api-object-access.txt b/Documentation/technical/api-object-access.txt
index 03bb0e950d..a1162e5bcd 100644
--- a/Documentation/technical/api-object-access.txt
+++ b/Documentation/technical/api-object-access.txt
@@ -7,7 +7,7 @@ Talk about <sha1_file.c> and <object.h> family, things like
 * read_object_with_reference()
 * has_sha1_file()
 * write_sha1_file()
-* pretend_sha1_file()
+* pretend_object_file()
 * lookup_{object,commit,tag,blob,tree}
 * parse_{object,commit,tag,blob,tree}
 * Use of object flags
diff --git a/blame.c b/blame.c
index 2893f3c103..1fc22b304b 100644
--- a/blame.c
+++ b/blame.c
@@ -232,7 +232,7 @@ static struct commit *fake_working_tree_commit(struct diff_options *opt,
 	convert_to_git(&the_index, path, buf.buf, buf.len, &buf, 0);
 	origin->file.ptr = buf.buf;
 	origin->file.size = buf.len;
-	pretend_sha1_file(buf.buf, buf.len, OBJ_BLOB, origin->blob_oid.hash);
+	pretend_object_file(buf.buf, buf.len, OBJ_BLOB, &origin->blob_oid);
 
 	/*
 	 * Read the current index, replace the path entry with
diff --git a/cache.h b/cache.h
index d8b975a571..e4e03ac51d 100644
--- a/cache.h
+++ b/cache.h
@@ -1241,7 +1241,10 @@ extern int sha1_object_info(const unsigned char *, unsigned long *);
 extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
 extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
 extern int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type, struct object_id *oid, unsigned flags);
-extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
+
+extern int pretend_object_file(void *, unsigned long, enum object_type,
+			       struct object_id *oid);
+
 extern int force_object_loose(const unsigned char *sha1, time_t mtime);
 extern int git_open_cloexec(const char *name, int flags);
 #define git_open(name) git_open_cloexec(name, O_RDONLY)
diff --git a/sha1_file.c b/sha1_file.c
index 3da70ac650..830b93b428 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1312,13 +1312,13 @@ static void *read_object(const unsigned char *sha1, enum object_type *type,
 	return content;
 }
 
-int pretend_sha1_file(void *buf, unsigned long len, enum object_type type,
-		      unsigned char *sha1)
+int pretend_object_file(void *buf, unsigned long len, enum object_type type,
+			struct object_id *oid)
 {
 	struct cached_object *co;
 
-	hash_sha1_file(buf, len, typename(type), sha1);
-	if (has_sha1_file(sha1) || find_cached_object(sha1))
+	hash_sha1_file(buf, len, typename(type), oid->hash);
+	if (has_sha1_file(oid->hash) || find_cached_object(oid->hash))
 		return 0;
 	ALLOC_GROW(cached_objects, cached_object_nr + 1, cached_object_alloc);
 	co = &cached_objects[cached_object_nr++];
@@ -1326,7 +1326,7 @@ int pretend_sha1_file(void *buf, unsigned long len, enum object_type type,
 	co->type = type;
 	co->buf = xmalloc(len);
 	memcpy(co->buf, buf, len);
-	hashcpy(co->sha1, sha1);
+	hashcpy(co->sha1, oid->hash);
 	return 0;
 }
 
-- 
2.14.3

[PATCH v3 04/14] dir: convert struct sha1_stat to use object_id

[Patryk Obara]

Convert the declaration of struct sha1_stat. Adjust all usages of this
struct and replace hash{clr,cmp,cpy} with oid{clr,cmp,cpy} wherever
possible.  Rename it to struct oid_stat.

Remove macro EMPTY_BLOB_SHA1_BIN, as it's no longer used.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 cache.h                              |  2 --
 dir.c                                | 56 +++++++++++++++++-------------------
 dir.h                                | 12 ++++----
 t/helper/test-dump-untracked-cache.c |  4 +--
 4 files changed, 34 insertions(+), 40 deletions(-)

diff --git a/cache.h b/cache.h
index e4e03ac51d..ed72933ba7 100644
--- a/cache.h
+++ b/cache.h
@@ -1047,8 +1047,6 @@ extern const struct object_id empty_tree_oid;
 	"\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \
 	"\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91"
 extern const struct object_id empty_blob_oid;
-#define EMPTY_BLOB_SHA1_BIN (empty_blob_oid.hash)
-
 
 static inline int is_empty_blob_sha1(const unsigned char *sha1)
 {
diff --git a/dir.c b/dir.c
index 7c4b45e30e..ef977b8657 100644
--- a/dir.c
+++ b/dir.c
@@ -233,10 +233,8 @@ int within_depth(const char *name, int namelen,
  *
  * Optionally updates the given sha1_stat with the given OID (when valid).
  */
-static int do_read_blob(const struct object_id *oid,
-			struct sha1_stat *sha1_stat,
-			size_t *size_out,
-			char **data_out)
+static int do_read_blob(const struct object_id *oid, struct oid_stat *sha1_stat,
+			size_t *size_out, char **data_out)
 {
 	enum object_type type;
 	unsigned long sz;
@@ -253,7 +251,7 @@ static int do_read_blob(const struct object_id *oid,
 
 	if (sha1_stat) {
 		memset(&sha1_stat->stat, 0, sizeof(sha1_stat->stat));
-		hashcpy(sha1_stat->sha1, oid->hash);
+		oidcpy(&sha1_stat->oid, oid);
 	}
 
 	if (sz == 0) {
@@ -654,9 +652,8 @@ void add_exclude(const char *string, const char *base,
 
 static int read_skip_worktree_file_from_index(const struct index_state *istate,
 					      const char *path,
-					      size_t *size_out,
-					      char **data_out,
-					      struct sha1_stat *sha1_stat)
+					      size_t *size_out, char **data_out,
+					      struct oid_stat *sha1_stat)
 {
 	int pos, len;
 
@@ -795,9 +792,8 @@ static int add_excludes_from_buffer(char *buf, size_t size,
  * ss_valid is non-zero, "ss" must contain good value as input.
  */
 static int add_excludes(const char *fname, const char *base, int baselen,
-			struct exclude_list *el,
-			struct index_state *istate,
-			struct sha1_stat *sha1_stat)
+			struct exclude_list *el, struct index_state *istate,
+			struct oid_stat *sha1_stat)
 {
 	struct stat st;
 	int r;
@@ -823,7 +819,7 @@ static int add_excludes(const char *fname, const char *base, int baselen,
 		if (size == 0) {
 			if (sha1_stat) {
 				fill_stat_data(&sha1_stat->stat, &st);
-				hashcpy(sha1_stat->sha1, EMPTY_BLOB_SHA1_BIN);
+				oidcpy(&sha1_stat->oid, &empty_blob_oid);
 				sha1_stat->valid = 1;
 			}
 			close(fd);
@@ -847,10 +843,11 @@ static int add_excludes(const char *fname, const char *base, int baselen,
 				 !ce_stage(istate->cache[pos]) &&
 				 ce_uptodate(istate->cache[pos]) &&
 				 !would_convert_to_git(istate, fname))
-				hashcpy(sha1_stat->sha1,
-					istate->cache[pos]->oid.hash);
+				oidcpy(&sha1_stat->oid,
+				       &istate->cache[pos]->oid);
 			else
-				hash_sha1_file(buf, size, "blob", sha1_stat->sha1);
+				hash_sha1_file(buf, size, "blob",
+					       sha1_stat->oid.hash);
 			fill_stat_data(&sha1_stat->stat, &st);
 			sha1_stat->valid = 1;
 		}
@@ -930,7 +927,7 @@ struct exclude_list *add_exclude_list(struct dir_struct *dir,
  * Used to set up core.excludesfile and .git/info/exclude lists.
  */
 static void add_excludes_from_file_1(struct dir_struct *dir, const char *fname,
-				     struct sha1_stat *sha1_stat)
+				     struct oid_stat *sha1_stat)
 {
 	struct exclude_list *el;
 	/*
@@ -1180,7 +1177,7 @@ static void prep_exclude(struct dir_struct *dir,
 
 	while (current < baselen) {
 		const char *cp;
-		struct sha1_stat sha1_stat;
+		struct oid_stat sha1_stat;
 
 		stk = xcalloc(1, sizeof(*stk));
 		if (current < 0) {
@@ -1223,7 +1220,7 @@ static void prep_exclude(struct dir_struct *dir,
 		}
 
 		/* Try to read per-directory file */
-		hashclr(sha1_stat.sha1);
+		oidclr(&sha1_stat.oid);
 		sha1_stat.valid = 0;
 		if (dir->exclude_per_dir &&
 		    /*
@@ -1269,9 +1266,9 @@ static void prep_exclude(struct dir_struct *dir,
 		 * order, though, if you do that.
 		 */
 		if (untracked &&
-		    hashcmp(sha1_stat.sha1, untracked->exclude_sha1)) {
+		    hashcmp(sha1_stat.oid.hash, untracked->exclude_sha1)) {
 			invalidate_gitignore(dir->untracked, untracked);
-			hashcpy(untracked->exclude_sha1, sha1_stat.sha1);
+			hashcpy(untracked->exclude_sha1, sha1_stat.oid.hash);
 		}
 		dir->exclude_stack = stk;
 		current = stk->baselen;
@@ -2228,13 +2225,13 @@ static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *d
 
 	/* Validate $GIT_DIR/info/exclude and core.excludesfile */
 	root = dir->untracked->root;
-	if (hashcmp(dir->ss_info_exclude.sha1,
-		    dir->untracked->ss_info_exclude.sha1)) {
+	if (oidcmp(&dir->ss_info_exclude.oid,
+		   &dir->untracked->ss_info_exclude.oid)) {
 		invalidate_gitignore(dir->untracked, root);
 		dir->untracked->ss_info_exclude = dir->ss_info_exclude;
 	}
-	if (hashcmp(dir->ss_excludes_file.sha1,
-		    dir->untracked->ss_excludes_file.sha1)) {
+	if (oidcmp(&dir->ss_excludes_file.oid,
+		   &dir->untracked->ss_excludes_file.oid)) {
 		invalidate_gitignore(dir->untracked, root);
 		dir->untracked->ss_excludes_file = dir->ss_excludes_file;
 	}
@@ -2638,8 +2635,8 @@ void write_untracked_extension(struct strbuf *out, struct untracked_cache *untra
 	FLEX_ALLOC_MEM(ouc, exclude_per_dir, untracked->exclude_per_dir, len);
 	stat_data_to_disk(&ouc->info_exclude_stat, &untracked->ss_info_exclude.stat);
 	stat_data_to_disk(&ouc->excludes_file_stat, &untracked->ss_excludes_file.stat);
-	hashcpy(ouc->info_exclude_sha1, untracked->ss_info_exclude.sha1);
-	hashcpy(ouc->excludes_file_sha1, untracked->ss_excludes_file.sha1);
+	hashcpy(ouc->info_exclude_sha1, untracked->ss_info_exclude.oid.hash);
+	hashcpy(ouc->excludes_file_sha1, untracked->ss_excludes_file.oid.hash);
 	ouc->dir_flags = htonl(untracked->dir_flags);
 
 	varint_len = encode_varint(untracked->ident.len, varbuf);
@@ -2816,12 +2813,11 @@ static void read_sha1(size_t pos, void *cb)
 	rd->data += 20;
 }
 
-static void load_sha1_stat(struct sha1_stat *sha1_stat,
-			   const unsigned char *data,
-			   const unsigned char *sha1)
+static void load_sha1_stat(struct oid_stat *sha1_stat,
+			   const unsigned char *data, const unsigned char *sha1)
 {
 	stat_data_from_disk(&sha1_stat->stat, data);
-	hashcpy(sha1_stat->sha1, sha1);
+	hashcpy(sha1_stat->oid.hash, sha1);
 	sha1_stat->valid = 1;
 }
 
diff --git a/dir.h b/dir.h
index 11a047ba48..e7bb786a33 100644
--- a/dir.h
+++ b/dir.h
@@ -74,9 +74,9 @@ struct exclude_list_group {
 	struct exclude_list *el;
 };
 
-struct sha1_stat {
+struct oid_stat {
 	struct stat_data stat;
-	unsigned char sha1[20];
+	struct object_id oid;
 	int valid;
 };
 
@@ -124,8 +124,8 @@ struct untracked_cache_dir {
 };
 
 struct untracked_cache {
-	struct sha1_stat ss_info_exclude;
-	struct sha1_stat ss_excludes_file;
+	struct oid_stat ss_info_exclude;
+	struct oid_stat ss_excludes_file;
 	const char *exclude_per_dir;
 	struct strbuf ident;
 	/*
@@ -195,8 +195,8 @@ struct dir_struct {
 
 	/* Enable untracked file cache if set */
 	struct untracked_cache *untracked;
-	struct sha1_stat ss_info_exclude;
-	struct sha1_stat ss_excludes_file;
+	struct oid_stat ss_info_exclude;
+	struct oid_stat ss_excludes_file;
 	unsigned unmanaged_exclude_files;
 };
 
diff --git a/t/helper/test-dump-untracked-cache.c b/t/helper/test-dump-untracked-cache.c
index f752532ffb..d7c55c2355 100644
--- a/t/helper/test-dump-untracked-cache.c
+++ b/t/helper/test-dump-untracked-cache.c
@@ -54,8 +54,8 @@ int cmd_main(int ac, const char **av)
 		printf("no untracked cache\n");
 		return 0;
 	}
-	printf("info/exclude %s\n", sha1_to_hex(uc->ss_info_exclude.sha1));
-	printf("core.excludesfile %s\n", sha1_to_hex(uc->ss_excludes_file.sha1));
+	printf("info/exclude %s\n", oid_to_hex(&uc->ss_info_exclude.oid));
+	printf("core.excludesfile %s\n", oid_to_hex(&uc->ss_excludes_file.oid));
 	printf("exclude_per_dir %s\n", uc->exclude_per_dir);
 	printf("flags %08x\n", uc->dir_flags);
 	if (uc->root)
-- 
2.14.3

Re: [PATCH v3 04/14] dir: convert struct sha1_stat to use object_id

[Junio C Hamano]

Patryk Obara <patryk.obara@gmail.com> writes:

> Convert the declaration of struct sha1_stat. Adjust all usages of this
> struct and replace hash{clr,cmp,cpy} with oid{clr,cmp,cpy} wherever
> possible.  Rename it to struct oid_stat.

OK, but a hunk like this makes readers wonder...

> -static int do_read_blob(const struct object_id *oid,
> -			struct sha1_stat *sha1_stat,
> -			size_t *size_out,
> -			char **data_out)
> +static int do_read_blob(const struct object_id *oid, struct oid_stat *sha1_stat,
> +			size_t *size_out, char **data_out)

... why the variable is still called sha1_stat, not oid_stat.  Is it
because it makes the patch too noisy or something?

> Remove macro EMPTY_BLOB_SHA1_BIN, as it's no longer used.

Good.

[PATCH v3 05/14] sha1_file: convert hash_sha1_file to object_id

[Patryk Obara]

Convert the declaration and definition of hash_sha1_file to use
struct object_id and adjust all function calls.

Rename this function to hash_object_file.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 apply.c                  |  4 ++--
 builtin/index-pack.c     |  5 ++---
 builtin/replace.c        |  2 +-
 builtin/unpack-objects.c |  2 +-
 cache-tree.c             | 11 +++++------
 cache.h                  |  5 ++++-
 convert.c                |  6 +++---
 diffcore-rename.c        |  4 ++--
 dir.c                    |  4 ++--
 log-tree.c               |  2 +-
 sha1_file.c              | 26 +++++++++++++-------------
 11 files changed, 36 insertions(+), 35 deletions(-)

diff --git a/apply.c b/apply.c
index 321a9fa68d..57ab8a8a29 100644
--- a/apply.c
+++ b/apply.c
@@ -3154,7 +3154,7 @@ static int apply_binary(struct apply_state *state,
 		 * See if the old one matches what the patch
 		 * applies to.
 		 */
-		hash_sha1_file(img->buf, img->len, blob_type, oid.hash);
+		hash_object_file(img->buf, img->len, blob_type, &oid);
 		if (strcmp(oid_to_hex(&oid), patch->old_sha1_prefix))
 			return error(_("the patch applies to '%s' (%s), "
 				       "which does not match the "
@@ -3199,7 +3199,7 @@ static int apply_binary(struct apply_state *state,
 				     name);
 
 		/* verify that the result matches */
-		hash_sha1_file(img->buf, img->len, blob_type, oid.hash);
+		hash_object_file(img->buf, img->len, blob_type, &oid);
 		if (strcmp(oid_to_hex(&oid), patch->new_sha1_prefix))
 			return error(_("binary patch to '%s' creates incorrect result (expecting %s, got %s)"),
 				name, patch->new_sha1_prefix, oid_to_hex(&oid));
diff --git a/builtin/index-pack.c b/builtin/index-pack.c
index 4c51aec81f..7f5a95e6ff 100644
--- a/builtin/index-pack.c
+++ b/builtin/index-pack.c
@@ -958,9 +958,8 @@ static void resolve_delta(struct object_entry *delta_obj,
 	free(delta_data);
 	if (!result->data)
 		bad_object(delta_obj->idx.offset, _("failed to apply delta"));
-	hash_sha1_file(result->data, result->size,
-		       typename(delta_obj->real_type),
-		       delta_obj->idx.oid.hash);
+	hash_object_file(result->data, result->size,
+			 typename(delta_obj->real_type), &delta_obj->idx.oid);
 	sha1_object(result->data, NULL, result->size, delta_obj->real_type,
 		    &delta_obj->idx.oid);
 	counter_lock();
diff --git a/builtin/replace.c b/builtin/replace.c
index 10078ae371..814bf6bfde 100644
--- a/builtin/replace.c
+++ b/builtin/replace.c
@@ -355,7 +355,7 @@ static void check_one_mergetag(struct commit *commit,
 	struct tag *tag;
 	int i;
 
-	hash_sha1_file(extra->value, extra->len, typename(OBJ_TAG), tag_oid.hash);
+	hash_object_file(extra->value, extra->len, typename(OBJ_TAG), &tag_oid);
 	tag = lookup_tag(&tag_oid);
 	if (!tag)
 		die(_("bad mergetag in commit '%s'"), ref);
diff --git a/builtin/unpack-objects.c b/builtin/unpack-objects.c
index 62ea264c46..85a40d1af7 100644
--- a/builtin/unpack-objects.c
+++ b/builtin/unpack-objects.c
@@ -258,7 +258,7 @@ static void write_object(unsigned nr, enum object_type type,
 	} else {
 		struct object *obj;
 		int eaten;
-		hash_sha1_file(buf, size, typename(type), obj_list[nr].oid.hash);
+		hash_object_file(buf, size, typename(type), &obj_list[nr].oid);
 		added_object(nr, type, buf, size);
 		obj = parse_object_buffer(&obj_list[nr].oid, type, size, buf,
 					  &eaten);
diff --git a/cache-tree.c b/cache-tree.c
index e03e72c34a..6574eeb80d 100644
--- a/cache-tree.c
+++ b/cache-tree.c
@@ -400,15 +400,14 @@ static int update_one(struct cache_tree *it,
 	}
 
 	if (repair) {
-		unsigned char sha1[20];
-		hash_sha1_file(buffer.buf, buffer.len, tree_type, sha1);
-		if (has_sha1_file(sha1))
-			hashcpy(it->oid.hash, sha1);
+		struct object_id oid;
+		hash_object_file(buffer.buf, buffer.len, tree_type, &oid);
+		if (has_sha1_file(oid.hash))
+			oidcpy(&it->oid, &oid);
 		else
 			to_invalidate = 1;
 	} else if (dryrun)
-		hash_sha1_file(buffer.buf, buffer.len, tree_type,
-			       it->oid.hash);
+		hash_object_file(buffer.buf, buffer.len, tree_type, &it->oid);
 	else if (write_sha1_file(buffer.buf, buffer.len, tree_type, it->oid.hash)) {
 		strbuf_release(&buffer);
 		return -1;
diff --git a/cache.h b/cache.h
index ed72933ba7..08f2b81e1b 100644
--- a/cache.h
+++ b/cache.h
@@ -1236,7 +1236,10 @@ static inline const unsigned char *lookup_replace_object(const unsigned char *sh
 
 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
 extern int sha1_object_info(const unsigned char *, unsigned long *);
-extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
+
+extern int hash_object_file(const void *buf, unsigned long len,
+			    const char *type, struct object_id *oid);
+
 extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
 extern int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type, struct object_id *oid, unsigned flags);
 
diff --git a/convert.c b/convert.c
index 1a41a48e15..5e46708c73 100644
--- a/convert.c
+++ b/convert.c
@@ -898,7 +898,7 @@ static int ident_to_git(const char *path, const char *src, size_t len,
 static int ident_to_worktree(const char *path, const char *src, size_t len,
                              struct strbuf *buf, int ident)
 {
-	unsigned char sha1[20];
+	struct object_id oid;
 	char *to_free = NULL, *dollar, *spc;
 	int cnt;
 
@@ -912,7 +912,7 @@ static int ident_to_worktree(const char *path, const char *src, size_t len,
 	/* are we "faking" in place editing ? */
 	if (src == buf->buf)
 		to_free = strbuf_detach(buf, NULL);
-	hash_sha1_file(src, len, "blob", sha1);
+	hash_object_file(src, len, "blob", &oid);
 
 	strbuf_grow(buf, len + cnt * 43);
 	for (;;) {
@@ -969,7 +969,7 @@ static int ident_to_worktree(const char *path, const char *src, size_t len,
 
 		/* step 4: substitute */
 		strbuf_addstr(buf, "Id: ");
-		strbuf_add(buf, sha1_to_hex(sha1), 40);
+		strbuf_addstr(buf, oid_to_hex(&oid));
 		strbuf_addstr(buf, " $");
 	}
 	strbuf_add(buf, src, len);
diff --git a/diffcore-rename.c b/diffcore-rename.c
index 245e999fe5..e27d0bb632 100644
--- a/diffcore-rename.c
+++ b/diffcore-rename.c
@@ -260,8 +260,8 @@ static unsigned int hash_filespec(struct diff_filespec *filespec)
 	if (!filespec->oid_valid) {
 		if (diff_populate_filespec(filespec, 0))
 			return 0;
-		hash_sha1_file(filespec->data, filespec->size, "blob",
-			       filespec->oid.hash);
+		hash_object_file(filespec->data, filespec->size, "blob",
+				 &filespec->oid);
 	}
 	return sha1hash(filespec->oid.hash);
 }
diff --git a/dir.c b/dir.c
index ef977b8657..177f9027be 100644
--- a/dir.c
+++ b/dir.c
@@ -846,8 +846,8 @@ static int add_excludes(const char *fname, const char *base, int baselen,
 				oidcpy(&sha1_stat->oid,
 				       &istate->cache[pos]->oid);
 			else
-				hash_sha1_file(buf, size, "blob",
-					       sha1_stat->oid.hash);
+				hash_object_file(buf, size, "blob",
+						 &sha1_stat->oid);
 			fill_stat_data(&sha1_stat->stat, &st);
 			sha1_stat->valid = 1;
 		}
diff --git a/log-tree.c b/log-tree.c
index fca29d4799..fc0cc0d6d1 100644
--- a/log-tree.c
+++ b/log-tree.c
@@ -499,7 +499,7 @@ static void show_one_mergetag(struct commit *commit,
 	int status, nth;
 	size_t payload_size, gpg_message_offset;
 
-	hash_sha1_file(extra->value, extra->len, typename(OBJ_TAG), oid.hash);
+	hash_object_file(extra->value, extra->len, typename(OBJ_TAG), &oid);
 	tag = lookup_tag(&oid);
 	if (!tag)
 		return; /* error message already given */
diff --git a/sha1_file.c b/sha1_file.c
index 830b93b428..4c44c60cec 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -788,7 +788,7 @@ void *xmmap(void *start, size_t length,
 int check_sha1_signature(const unsigned char *sha1, void *map,
 			 unsigned long size, const char *type)
 {
-	unsigned char real_sha1[20];
+	struct object_id real_oid;
 	enum object_type obj_type;
 	struct git_istream *st;
 	git_SHA_CTX c;
@@ -796,8 +796,8 @@ int check_sha1_signature(const unsigned char *sha1, void *map,
 	int hdrlen;
 
 	if (map) {
-		hash_sha1_file(map, size, type, real_sha1);
-		return hashcmp(sha1, real_sha1) ? -1 : 0;
+		hash_object_file(map, size, type, &real_oid);
+		return hashcmp(sha1, real_oid.hash) ? -1 : 0;
 	}
 
 	st = open_istream(sha1, &obj_type, &size, NULL);
@@ -822,9 +822,9 @@ int check_sha1_signature(const unsigned char *sha1, void *map,
 			break;
 		git_SHA1_Update(&c, buf, readlen);
 	}
-	git_SHA1_Final(real_sha1, &c);
+	git_SHA1_Final(real_oid.hash, &c);
 	close_istream(st);
-	return hashcmp(sha1, real_sha1) ? -1 : 0;
+	return hashcmp(sha1, real_oid.hash) ? -1 : 0;
 }
 
 int git_open_cloexec(const char *name, int flags)
@@ -1317,7 +1317,7 @@ int pretend_object_file(void *buf, unsigned long len, enum object_type type,
 {
 	struct cached_object *co;
 
-	hash_sha1_file(buf, len, typename(type), oid->hash);
+	hash_object_file(buf, len, typename(type), oid);
 	if (has_sha1_file(oid->hash) || find_cached_object(oid->hash))
 		return 0;
 	ALLOC_GROW(cached_objects, cached_object_nr + 1, cached_object_alloc);
@@ -1485,12 +1485,12 @@ static int write_buffer(int fd, const void *buf, size_t len)
 	return 0;
 }
 
-int hash_sha1_file(const void *buf, unsigned long len, const char *type,
-                   unsigned char *sha1)
+int hash_object_file(const void *buf, unsigned long len, const char *type,
+		     struct object_id *oid)
 {
 	char hdr[32];
 	int hdrlen = sizeof(hdr);
-	write_sha1_file_prepare(buf, len, type, sha1, hdr, &hdrlen);
+	write_sha1_file_prepare(buf, len, type, oid->hash, hdr, &hdrlen);
 	return 0;
 }
 
@@ -1769,7 +1769,7 @@ static int index_mem(struct object_id *oid, void *buf, size_t size,
 	if (write_object)
 		ret = write_sha1_file(buf, size, typename(type), oid->hash);
 	else
-		ret = hash_sha1_file(buf, size, typename(type), oid->hash);
+		ret = hash_object_file(buf, size, typename(type), oid);
 	if (re_allocated)
 		free(buf);
 	return ret;
@@ -1792,8 +1792,8 @@ static int index_stream_convert_blob(struct object_id *oid, int fd,
 		ret = write_sha1_file(sbuf.buf, sbuf.len, typename(OBJ_BLOB),
 				      oid->hash);
 	else
-		ret = hash_sha1_file(sbuf.buf, sbuf.len, typename(OBJ_BLOB),
-				     oid->hash);
+		ret = hash_object_file(sbuf.buf, sbuf.len, typename(OBJ_BLOB),
+				       oid);
 	strbuf_release(&sbuf);
 	return ret;
 }
@@ -1907,7 +1907,7 @@ int index_path(struct object_id *oid, const char *path, struct stat *st, unsigne
 		if (strbuf_readlink(&sb, path, st->st_size))
 			return error_errno("readlink(\"%s\")", path);
 		if (!(flags & HASH_WRITE_OBJECT))
-			hash_sha1_file(sb.buf, sb.len, blob_type, oid->hash);
+			hash_object_file(sb.buf, sb.len, blob_type, oid);
 		else if (write_sha1_file(sb.buf, sb.len, blob_type, oid->hash))
 			rc = error("%s: failed to insert into database", path);
 		strbuf_release(&sb);
-- 
2.14.3

[PATCH v3 06/14] cache: clear whole hash buffer with oidclr

[Patryk Obara]

As long as GIT_SHA1_RAWSZ is equal to GIT_MAX_RAWSZ there's no problem,
but when new hashing algorithm will be in place this memset will clear
only 20-byte prefix of hash buffer.

Alternatively, hashclr implementation could be adjusted, but this
function is almost removed from codebase already.  Separate
implementation of oidclr prevents potential buffer overrun in case
someone incorrectly used hashclr on object_id in future.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 cache.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cache.h b/cache.h
index 08f2b81e1b..d5d78d6a51 100644
--- a/cache.h
+++ b/cache.h
@@ -1029,7 +1029,7 @@ static inline void hashclr(unsigned char *hash)
 
 static inline void oidclr(struct object_id *oid)
 {
-	hashclr(oid->hash);
+	memset(oid->hash, 0, GIT_MAX_RAWSZ);
 }
 
 
-- 
2.14.3

[PATCH v3 07/14] match-trees: convert splice_tree to object_id

[Patryk Obara]

Convert the definition of static recursive splice_tree function to use
struct object_id and adjust single caller.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 match-trees.c | 46 ++++++++++++++++++++++------------------------
 1 file changed, 22 insertions(+), 24 deletions(-)

diff --git a/match-trees.c b/match-trees.c
index 396b7338df..afb771c4f5 100644
--- a/match-trees.c
+++ b/match-trees.c
@@ -158,22 +158,20 @@ static void match_trees(const struct object_id *hash1,
 }
 
 /*
- * A tree "hash1" has a subdirectory at "prefix".  Come up with a
- * tree object by replacing it with another tree "hash2".
+ * A tree "oid1" has a subdirectory at "prefix".  Come up with a tree object by
+ * replacing it with another tree "oid2".
  */
-static int splice_tree(const unsigned char *hash1,
-		       const char *prefix,
-		       const unsigned char *hash2,
-		       unsigned char *result)
+static int splice_tree(const struct object_id *oid1, const char *prefix,
+		       const struct object_id *oid2, struct object_id *result)
 {
 	char *subpath;
 	int toplen;
 	char *buf;
 	unsigned long sz;
 	struct tree_desc desc;
-	unsigned char *rewrite_here;
-	const unsigned char *rewrite_with;
-	unsigned char subtree[20];
+	struct object_id *rewrite_here;
+	const struct object_id *rewrite_with;
+	struct object_id subtree;
 	enum object_type type;
 	int status;
 
@@ -182,9 +180,9 @@ static int splice_tree(const unsigned char *hash1,
 	if (*subpath)
 		subpath++;
 
-	buf = read_sha1_file(hash1, &type, &sz);
+	buf = read_sha1_file(oid1->hash, &type, &sz);
 	if (!buf)
-		die("cannot read tree %s", sha1_to_hex(hash1));
+		die("cannot read tree %s", oid_to_hex(oid1));
 	init_tree_desc(&desc, buf, sz);
 
 	rewrite_here = NULL;
@@ -197,26 +195,26 @@ static int splice_tree(const unsigned char *hash1,
 		if (strlen(name) == toplen &&
 		    !memcmp(name, prefix, toplen)) {
 			if (!S_ISDIR(mode))
-				die("entry %s in tree %s is not a tree",
-				    name, sha1_to_hex(hash1));
-			rewrite_here = (unsigned char *) oid->hash;
+				die("entry %s in tree %s is not a tree", name,
+				    oid_to_hex(oid1));
+			rewrite_here = (struct object_id *)oid;
 			break;
 		}
 		update_tree_entry(&desc);
 	}
 	if (!rewrite_here)
-		die("entry %.*s not found in tree %s",
-		    toplen, prefix, sha1_to_hex(hash1));
+		die("entry %.*s not found in tree %s", toplen, prefix,
+		    oid_to_hex(oid1));
 	if (*subpath) {
-		status = splice_tree(rewrite_here, subpath, hash2, subtree);
+		status = splice_tree(rewrite_here, subpath, oid2, &subtree);
 		if (status)
 			return status;
-		rewrite_with = subtree;
+		rewrite_with = &subtree;
+	} else {
+		rewrite_with = oid2;
 	}
-	else
-		rewrite_with = hash2;
-	hashcpy(rewrite_here, rewrite_with);
-	status = write_sha1_file(buf, sz, tree_type, result);
+	oidcpy(rewrite_here, rewrite_with);
+	status = write_sha1_file(buf, sz, tree_type, result->hash);
 	free(buf);
 	return status;
 }
@@ -280,7 +278,7 @@ void shift_tree(const struct object_id *hash1,
 	if (!*add_prefix)
 		return;
 
-	splice_tree(hash1->hash, add_prefix, hash2->hash, shifted->hash);
+	splice_tree(hash1, add_prefix, hash2, shifted);
 }
 
 /*
@@ -334,7 +332,7 @@ void shift_tree_by(const struct object_id *hash1,
 		 * shift tree2 down by adding shift_prefix above it
 		 * to match tree1.
 		 */
-		splice_tree(hash1->hash, shift_prefix, hash2->hash, shifted->hash);
+		splice_tree(hash1, shift_prefix, hash2, shifted);
 	else
 		/*
 		 * shift tree2 up by removing shift_prefix from it
-- 
2.14.3

[PATCH v3 08/14] commit: convert commit_tree* to object_id

[Patryk Obara]

Convert the definitions and declarations of commit_tree and
commit_tree_extended to use struct object_id and adjust all usages of
these functions.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 builtin/am.c          |  4 ++--
 builtin/commit-tree.c |  4 ++--
 builtin/commit.c      |  5 +++--
 builtin/merge.c       |  8 ++++----
 commit.c              | 15 +++++++--------
 commit.h              | 11 ++++++-----
 notes-cache.c         |  4 ++--
 notes-merge.c         |  9 ++++-----
 notes-utils.c         |  7 ++++---
 notes-utils.h         |  3 ++-
 10 files changed, 36 insertions(+), 34 deletions(-)

diff --git a/builtin/am.c b/builtin/am.c
index acfe9d3c8c..6e6abb05cd 100644
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -1641,8 +1641,8 @@ static void do_commit(const struct am_state *state)
 		setenv("GIT_COMMITTER_DATE",
 			state->ignore_date ? "" : state->author_date, 1);
 
-	if (commit_tree(state->msg, state->msg_len, tree.hash, parents, commit.hash,
-				author, state->sign_commit))
+	if (commit_tree(state->msg, state->msg_len, &tree, parents, &commit,
+			author, state->sign_commit))
 		die(_("failed to write commit object"));
 
 	reflog_msg = getenv("GIT_REFLOG_ACTION");
diff --git a/builtin/commit-tree.c b/builtin/commit-tree.c
index 2177251e24..e5bdf57b1e 100644
--- a/builtin/commit-tree.c
+++ b/builtin/commit-tree.c
@@ -117,8 +117,8 @@ int cmd_commit_tree(int argc, const char **argv, const char *prefix)
 			die_errno("git commit-tree: failed to read");
 	}
 
-	if (commit_tree(buffer.buf, buffer.len, tree_oid.hash, parents,
-			commit_oid.hash, NULL, sign_commit)) {
+	if (commit_tree(buffer.buf, buffer.len, &tree_oid, parents, &commit_oid,
+			NULL, sign_commit)) {
 		strbuf_release(&buffer);
 		return 1;
 	}
diff --git a/builtin/commit.c b/builtin/commit.c
index 4610e3d8e3..e5974a5999 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -1794,8 +1794,9 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
 		append_merge_tag_headers(parents, &tail);
 	}
 
-	if (commit_tree_extended(sb.buf, sb.len, active_cache_tree->oid.hash,
-			 parents, oid.hash, author_ident.buf, sign_commit, extra)) {
+	if (commit_tree_extended(sb.buf, sb.len, &active_cache_tree->oid,
+				 parents, &oid, author_ident.buf, sign_commit,
+				 extra)) {
 		rollback_index_files();
 		die(_("failed to write commit object"));
 	}
diff --git a/builtin/merge.c b/builtin/merge.c
index 30264cfd7c..92ba99a1a5 100644
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -820,8 +820,8 @@ static int merge_trivial(struct commit *head, struct commit_list *remoteheads)
 	pptr = commit_list_append(head, pptr);
 	pptr = commit_list_append(remoteheads->item, pptr);
 	prepare_to_commit(remoteheads);
-	if (commit_tree(merge_msg.buf, merge_msg.len, result_tree.hash, parents,
-			result_commit.hash, NULL, sign_commit))
+	if (commit_tree(merge_msg.buf, merge_msg.len, &result_tree, parents,
+			&result_commit, NULL, sign_commit))
 		die(_("failed to write commit object"));
 	finish(head, remoteheads, &result_commit, "In-index merge");
 	drop_save();
@@ -845,8 +845,8 @@ static int finish_automerge(struct commit *head,
 		commit_list_insert(head, &parents);
 	strbuf_addch(&merge_msg, '\n');
 	prepare_to_commit(remoteheads);
-	if (commit_tree(merge_msg.buf, merge_msg.len, result_tree->hash, parents,
-			result_commit.hash, NULL, sign_commit))
+	if (commit_tree(merge_msg.buf, merge_msg.len, result_tree, parents,
+			&result_commit, NULL, sign_commit))
 		die(_("failed to write commit object"));
 	strbuf_addf(&buf, "Merge made by the '%s' strategy.", wt_strategy);
 	finish(head, remoteheads, &result_commit, buf.buf);
diff --git a/commit.c b/commit.c
index ff51c9f34a..643f3daec3 100644
--- a/commit.c
+++ b/commit.c
@@ -1380,9 +1380,8 @@ void free_commit_extra_headers(struct commit_extra_header *extra)
 	}
 }
 
-int commit_tree(const char *msg, size_t msg_len,
-		const unsigned char *tree,
-		struct commit_list *parents, unsigned char *ret,
+int commit_tree(const char *msg, size_t msg_len, const struct object_id *tree,
+		struct commit_list *parents, struct object_id *ret,
 		const char *author, const char *sign_commit)
 {
 	struct commit_extra_header *extra = NULL, **tail = &extra;
@@ -1511,8 +1510,8 @@ N_("Warning: commit message did not conform to UTF-8.\n"
    "variable i18n.commitencoding to the encoding your project uses.\n");
 
 int commit_tree_extended(const char *msg, size_t msg_len,
-			 const unsigned char *tree,
-			 struct commit_list *parents, unsigned char *ret,
+			 const struct object_id *tree,
+			 struct commit_list *parents, struct object_id *ret,
 			 const char *author, const char *sign_commit,
 			 struct commit_extra_header *extra)
 {
@@ -1520,7 +1519,7 @@ int commit_tree_extended(const char *msg, size_t msg_len,
 	int encoding_is_utf8;
 	struct strbuf buffer;
 
-	assert_sha1_type(tree, OBJ_TREE);
+	assert_sha1_type(tree->hash, OBJ_TREE);
 
 	if (memchr(msg, '\0', msg_len))
 		return error("a NUL byte in commit log message not allowed.");
@@ -1529,7 +1528,7 @@ int commit_tree_extended(const char *msg, size_t msg_len,
 	encoding_is_utf8 = is_encoding_utf8(git_commit_encoding);
 
 	strbuf_init(&buffer, 8192); /* should avoid reallocs for the headers */
-	strbuf_addf(&buffer, "tree %s\n", sha1_to_hex(tree));
+	strbuf_addf(&buffer, "tree %s\n", oid_to_hex(tree));
 
 	/*
 	 * NOTE! This ordering means that the same exact tree merged with a
@@ -1568,7 +1567,7 @@ int commit_tree_extended(const char *msg, size_t msg_len,
 		goto out;
 	}
 
-	result = write_sha1_file(buffer.buf, buffer.len, commit_type, ret);
+	result = write_sha1_file(buffer.buf, buffer.len, commit_type, ret->hash);
 out:
 	strbuf_release(&buffer);
 	return result;
diff --git a/commit.h b/commit.h
index 425f402775..0fb8271665 100644
--- a/commit.h
+++ b/commit.h
@@ -262,14 +262,15 @@ extern void append_merge_tag_headers(struct commit_list *parents,
 				     struct commit_extra_header ***tail);
 
 extern int commit_tree(const char *msg, size_t msg_len,
-		       const unsigned char *tree,
-		       struct commit_list *parents, unsigned char *ret,
+		       const struct object_id *tree,
+		       struct commit_list *parents, struct object_id *ret,
 		       const char *author, const char *sign_commit);
 
 extern int commit_tree_extended(const char *msg, size_t msg_len,
-				const unsigned char *tree,
-				struct commit_list *parents, unsigned char *ret,
-				const char *author, const char *sign_commit,
+				const struct object_id *tree,
+				struct commit_list *parents,
+				struct object_id *ret, const char *author,
+				const char *sign_commit,
 				struct commit_extra_header *);
 
 extern struct commit_extra_header *read_commit_extra_headers(struct commit *, const char **);
diff --git a/notes-cache.c b/notes-cache.c
index 17ee8602b3..d2f87147cc 100644
--- a/notes-cache.c
+++ b/notes-cache.c
@@ -56,8 +56,8 @@ int notes_cache_write(struct notes_cache *c)
 
 	if (write_notes_tree(&c->tree, tree_oid.hash))
 		return -1;
-	if (commit_tree(c->validity, strlen(c->validity), tree_oid.hash, NULL,
-			commit_oid.hash, NULL, NULL) < 0)
+	if (commit_tree(c->validity, strlen(c->validity), &tree_oid, NULL,
+			&commit_oid, NULL, NULL) < 0)
 		return -1;
 	if (update_ref("update notes cache", c->tree.update_ref, &commit_oid,
 		       NULL, 0, UPDATE_REFS_QUIET_ON_ERR) < 0)
diff --git a/notes-merge.c b/notes-merge.c
index 0f6573cb17..c09c5e0e47 100644
--- a/notes-merge.c
+++ b/notes-merge.c
@@ -642,9 +642,8 @@ int notes_merge(struct notes_merge_options *o,
 		struct commit_list *parents = NULL;
 		commit_list_insert(remote, &parents); /* LIFO order */
 		commit_list_insert(local, &parents);
-		create_notes_commit(local_tree, parents,
-				    o->commit_msg.buf, o->commit_msg.len,
-				    result_oid->hash);
+		create_notes_commit(local_tree, parents, o->commit_msg.buf,
+				    o->commit_msg.len, result_oid);
 	}
 
 found_result:
@@ -718,8 +717,8 @@ int notes_merge_commit(struct notes_merge_options *o,
 		strbuf_setlen(&path, baselen);
 	}
 
-	create_notes_commit(partial_tree, partial_commit->parents,
-			    msg, strlen(msg), result_oid->hash);
+	create_notes_commit(partial_tree, partial_commit->parents, msg,
+			    strlen(msg), result_oid);
 	unuse_commit_buffer(partial_commit, buffer);
 	if (o->verbosity >= 4)
 		printf("Finalized notes merge commit: %s\n",
diff --git a/notes-utils.c b/notes-utils.c
index 5c8e70c98f..058c642dac 100644
--- a/notes-utils.c
+++ b/notes-utils.c
@@ -6,7 +6,7 @@
 
 void create_notes_commit(struct notes_tree *t, struct commit_list *parents,
 			 const char *msg, size_t msg_len,
-			 unsigned char *result_sha1)
+			 struct object_id *result_oid)
 {
 	struct object_id tree_oid;
 
@@ -27,7 +27,8 @@ void create_notes_commit(struct notes_tree *t, struct commit_list *parents,
 		/* else: t->ref points to nothing, assume root/orphan commit */
 	}
 
-	if (commit_tree(msg, msg_len, tree_oid.hash, parents, result_sha1, NULL, NULL))
+	if (commit_tree(msg, msg_len, &tree_oid, parents, result_oid, NULL,
+			NULL))
 		die("Failed to commit notes tree to database");
 }
 
@@ -47,7 +48,7 @@ void commit_notes(struct notes_tree *t, const char *msg)
 	strbuf_addstr(&buf, msg);
 	strbuf_complete_line(&buf);
 
-	create_notes_commit(t, NULL, buf.buf, buf.len, commit_oid.hash);
+	create_notes_commit(t, NULL, buf.buf, buf.len, &commit_oid);
 	strbuf_insert(&buf, 0, "notes: ", 7); /* commit message starts at index 7 */
 	update_ref(buf.buf, t->update_ref, &commit_oid, NULL, 0,
 		   UPDATE_REFS_DIE_ON_ERR);
diff --git a/notes-utils.h b/notes-utils.h
index 1190578398..5d79cbef51 100644
--- a/notes-utils.h
+++ b/notes-utils.h
@@ -15,7 +15,8 @@
  * The resulting commit SHA1 is stored in result_sha1.
  */
 void create_notes_commit(struct notes_tree *t, struct commit_list *parents,
-			 const char *msg, size_t msg_len, unsigned char *result_sha1);
+			 const char *msg, size_t msg_len,
+			 struct object_id *result_oid);
 
 void commit_notes(struct notes_tree *t, const char *msg);
 
-- 
2.14.3

[PATCH v3 09/14] notes: convert combine_notes_* to object_id

[Patryk Obara]

Convert the definition and declarations of combine_notes_* functions
to struct object_id and adjust usage of these functions.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 notes.c | 46 +++++++++++++++++++++++-----------------------
 notes.h | 25 +++++++++++++++----------
 2 files changed, 38 insertions(+), 33 deletions(-)

diff --git a/notes.c b/notes.c
index c7f21fae44..3f4f94507a 100644
--- a/notes.c
+++ b/notes.c
@@ -270,8 +270,8 @@ static int note_tree_insert(struct notes_tree *t, struct int_node *tree,
 				if (!oidcmp(&l->val_oid, &entry->val_oid))
 					return 0;
 
-				ret = combine_notes(l->val_oid.hash,
-						    entry->val_oid.hash);
+				ret = combine_notes(&l->val_oid,
+						    &entry->val_oid);
 				if (!ret && is_null_oid(&l->val_oid))
 					note_tree_remove(t, tree, n, entry);
 				free(entry);
@@ -786,8 +786,8 @@ static int prune_notes_helper(const struct object_id *object_oid,
 	return 0;
 }
 
-int combine_notes_concatenate(unsigned char *cur_sha1,
-		const unsigned char *new_sha1)
+int combine_notes_concatenate(struct object_id *cur_oid,
+			      const struct object_id *new_oid)
 {
 	char *cur_msg = NULL, *new_msg = NULL, *buf;
 	unsigned long cur_len, new_len, buf_len;
@@ -795,18 +795,18 @@ int combine_notes_concatenate(unsigned char *cur_sha1,
 	int ret;
 
 	/* read in both note blob objects */
-	if (!is_null_sha1(new_sha1))
-		new_msg = read_sha1_file(new_sha1, &new_type, &new_len);
+	if (!is_null_oid(new_oid))
+		new_msg = read_sha1_file(new_oid->hash, &new_type, &new_len);
 	if (!new_msg || !new_len || new_type != OBJ_BLOB) {
 		free(new_msg);
 		return 0;
 	}
-	if (!is_null_sha1(cur_sha1))
-		cur_msg = read_sha1_file(cur_sha1, &cur_type, &cur_len);
+	if (!is_null_oid(cur_oid))
+		cur_msg = read_sha1_file(cur_oid->hash, &cur_type, &cur_len);
 	if (!cur_msg || !cur_len || cur_type != OBJ_BLOB) {
 		free(cur_msg);
 		free(new_msg);
-		hashcpy(cur_sha1, new_sha1);
+		oidcpy(cur_oid, new_oid);
 		return 0;
 	}
 
@@ -825,20 +825,20 @@ int combine_notes_concatenate(unsigned char *cur_sha1,
 	free(new_msg);
 
 	/* create a new blob object from buf */
-	ret = write_sha1_file(buf, buf_len, blob_type, cur_sha1);
+	ret = write_sha1_file(buf, buf_len, blob_type, cur_oid->hash);
 	free(buf);
 	return ret;
 }
 
-int combine_notes_overwrite(unsigned char *cur_sha1,
-		const unsigned char *new_sha1)
+int combine_notes_overwrite(struct object_id *cur_oid,
+			    const struct object_id *new_oid)
 {
-	hashcpy(cur_sha1, new_sha1);
+	oidcpy(cur_oid, new_oid);
 	return 0;
 }
 
-int combine_notes_ignore(unsigned char *cur_sha1,
-		const unsigned char *new_sha1)
+int combine_notes_ignore(struct object_id *cur_oid,
+			 const struct object_id *new_oid)
 {
 	return 0;
 }
@@ -848,17 +848,17 @@ int combine_notes_ignore(unsigned char *cur_sha1,
  * newlines removed.
  */
 static int string_list_add_note_lines(struct string_list *list,
-				      const unsigned char *sha1)
+				      const struct object_id *oid)
 {
 	char *data;
 	unsigned long len;
 	enum object_type t;
 
-	if (is_null_sha1(sha1))
+	if (is_null_oid(oid))
 		return 0;
 
 	/* read_sha1_file NUL-terminates */
-	data = read_sha1_file(sha1, &t, &len);
+	data = read_sha1_file(oid->hash, &t, &len);
 	if (t != OBJ_BLOB || !data || !len) {
 		free(data);
 		return t != OBJ_BLOB || !data;
@@ -884,17 +884,17 @@ static int string_list_join_lines_helper(struct string_list_item *item,
 	return 0;
 }
 
-int combine_notes_cat_sort_uniq(unsigned char *cur_sha1,
-		const unsigned char *new_sha1)
+int combine_notes_cat_sort_uniq(struct object_id *cur_oid,
+				const struct object_id *new_oid)
 {
 	struct string_list sort_uniq_list = STRING_LIST_INIT_DUP;
 	struct strbuf buf = STRBUF_INIT;
 	int ret = 1;
 
 	/* read both note blob objects into unique_lines */
-	if (string_list_add_note_lines(&sort_uniq_list, cur_sha1))
+	if (string_list_add_note_lines(&sort_uniq_list, cur_oid))
 		goto out;
-	if (string_list_add_note_lines(&sort_uniq_list, new_sha1))
+	if (string_list_add_note_lines(&sort_uniq_list, new_oid))
 		goto out;
 	string_list_remove_empty_items(&sort_uniq_list, 0);
 	string_list_sort(&sort_uniq_list);
@@ -905,7 +905,7 @@ int combine_notes_cat_sort_uniq(unsigned char *cur_sha1,
 				 string_list_join_lines_helper, &buf))
 		goto out;
 
-	ret = write_sha1_file(buf.buf, buf.len, blob_type, cur_sha1);
+	ret = write_sha1_file(buf.buf, buf.len, blob_type, cur_oid->hash);
 
 out:
 	strbuf_release(&buf);
diff --git a/notes.h b/notes.h
index 3848c2fb3f..88da38b5f4 100644
--- a/notes.h
+++ b/notes.h
@@ -9,27 +9,32 @@
  * When adding a new note annotating the same object as an existing note, it is
  * up to the caller to decide how to combine the two notes. The decision is
  * made by passing in a function of the following form. The function accepts
- * two SHA1s -- of the existing note and the new note, respectively. The
+ * two object_ids -- of the existing note and the new note, respectively. The
  * function then combines the notes in whatever way it sees fit, and writes the
- * resulting SHA1 into the first SHA1 argument (cur_sha1). A non-zero return
+ * resulting oid into the first argument (cur_oid). A non-zero return
  * value indicates failure.
  *
- * The two given SHA1s shall both be non-NULL and different from each other.
- * Either of them (but not both) may be == null_sha1, which indicates an
- * empty/non-existent note. If the resulting SHA1 (cur_sha1) is == null_sha1,
+ * The two given object_ids shall both be non-NULL and different from each
+ * other. Either of them (but not both) may be == null_oid, which indicates an
+ * empty/non-existent note. If the resulting oid (cur_oid) is == null_oid,
  * the note will be removed from the notes tree.
  *
  * The default combine_notes function (you get this when passing NULL) is
  * combine_notes_concatenate(), which appends the contents of the new note to
  * the contents of the existing note.
  */
-typedef int (*combine_notes_fn)(unsigned char *cur_sha1, const unsigned char *new_sha1);
+typedef int (*combine_notes_fn)(struct object_id *cur_oid,
+				const struct object_id *new_oid);
 
 /* Common notes combinators */
-int combine_notes_concatenate(unsigned char *cur_sha1, const unsigned char *new_sha1);
-int combine_notes_overwrite(unsigned char *cur_sha1, const unsigned char *new_sha1);
-int combine_notes_ignore(unsigned char *cur_sha1, const unsigned char *new_sha1);
-int combine_notes_cat_sort_uniq(unsigned char *cur_sha1, const unsigned char *new_sha1);
+int combine_notes_concatenate(struct object_id *cur_oid,
+			      const struct object_id *new_oid);
+int combine_notes_overwrite(struct object_id *cur_oid,
+			    const struct object_id *new_oid);
+int combine_notes_ignore(struct object_id *cur_oid,
+			 const struct object_id *new_oid);
+int combine_notes_cat_sort_uniq(struct object_id *cur_oid,
+				const struct object_id *new_oid);
 
 /*
  * Notes tree object
-- 
2.14.3

[PATCH v3 10/14] notes: convert write_notes_tree to object_id

[Patryk Obara]

Convert the definition and declaration of write_notes_tree to
struct object_id and adjust usage of this function.

Additionally, improve style of small part of this function, as old
formatting made it hard to understand at glance what this part of
code is doing.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 notes-cache.c |  2 +-
 notes-utils.c |  2 +-
 notes.c       | 16 +++++++++-------
 notes.h       |  4 ++--
 4 files changed, 13 insertions(+), 11 deletions(-)

diff --git a/notes-cache.c b/notes-cache.c
index d2f87147cc..010ad236cb 100644
--- a/notes-cache.c
+++ b/notes-cache.c
@@ -54,7 +54,7 @@ int notes_cache_write(struct notes_cache *c)
 	if (!c->tree.dirty)
 		return 0;
 
-	if (write_notes_tree(&c->tree, tree_oid.hash))
+	if (write_notes_tree(&c->tree, &tree_oid))
 		return -1;
 	if (commit_tree(c->validity, strlen(c->validity), &tree_oid, NULL,
 			&commit_oid, NULL, NULL) < 0)
diff --git a/notes-utils.c b/notes-utils.c
index 058c642dac..02407fe2a7 100644
--- a/notes-utils.c
+++ b/notes-utils.c
@@ -12,7 +12,7 @@ void create_notes_commit(struct notes_tree *t, struct commit_list *parents,
 
 	assert(t->initialized);
 
-	if (write_notes_tree(t, tree_oid.hash))
+	if (write_notes_tree(t, &tree_oid))
 		die("Failed to write notes tree to database");
 
 	if (!parents) {
diff --git a/notes.c b/notes.c
index 3f4f94507a..09ef1ce33a 100644
--- a/notes.c
+++ b/notes.c
@@ -1123,11 +1123,12 @@ int for_each_note(struct notes_tree *t, int flags, each_note_fn fn,
 	return for_each_note_helper(t, t->root, 0, 0, flags, fn, cb_data);
 }
 
-int write_notes_tree(struct notes_tree *t, unsigned char *result)
+int write_notes_tree(struct notes_tree *t, struct object_id *result)
 {
 	struct tree_write_stack root;
 	struct write_each_note_data cb_data;
 	int ret;
+	int flags;
 
 	if (!t)
 		t = &default_notes_tree;
@@ -1141,12 +1142,13 @@ int write_notes_tree(struct notes_tree *t, unsigned char *result)
 	cb_data.next_non_note = t->first_non_note;
 
 	/* Write tree objects representing current notes tree */
-	ret = for_each_note(t, FOR_EACH_NOTE_DONT_UNPACK_SUBTREES |
-				FOR_EACH_NOTE_YIELD_SUBTREES,
-			write_each_note, &cb_data) ||
-		write_each_non_note_until(NULL, &cb_data) ||
-		tree_write_stack_finish_subtree(&root) ||
-		write_sha1_file(root.buf.buf, root.buf.len, tree_type, result);
+	flags = FOR_EACH_NOTE_DONT_UNPACK_SUBTREES |
+		FOR_EACH_NOTE_YIELD_SUBTREES;
+	ret = for_each_note(t, flags, write_each_note, &cb_data) ||
+	      write_each_non_note_until(NULL, &cb_data) ||
+	      tree_write_stack_finish_subtree(&root) ||
+	      write_sha1_file(root.buf.buf, root.buf.len, tree_type,
+			      result->hash);
 	strbuf_release(&root.buf);
 	return ret;
 }
diff --git a/notes.h b/notes.h
index 88da38b5f4..0433f45db5 100644
--- a/notes.h
+++ b/notes.h
@@ -217,7 +217,7 @@ int for_each_note(struct notes_tree *t, int flags, each_note_fn fn,
  * Write the given notes_tree structure to the object database
  *
  * Creates a new tree object encapsulating the current state of the given
- * notes_tree, and stores its SHA1 into the 'result' argument.
+ * notes_tree, and stores its object id into the 'result' argument.
  *
  * Returns zero on success, non-zero on failure.
  *
@@ -225,7 +225,7 @@ int for_each_note(struct notes_tree *t, int flags, each_note_fn fn,
  * this function has returned zero. Please also remember to create a
  * corresponding commit object, and update the appropriate notes ref.
  */
-int write_notes_tree(struct notes_tree *t, unsigned char *result);
+int write_notes_tree(struct notes_tree *t, struct object_id *result);
 
 /* Flags controlling the operation of prune */
 #define NOTES_PRUNE_VERBOSE 1
-- 
2.14.3

[PATCH v3 11/14] sha1_file: convert write_sha1_file to object_id

[Patryk Obara]

Convert the definition and declaration of write_sha1_file to
struct object_id and adjust usage of this function.

This commit also converts static function write_sha1_file_prepare, as it
is closely related.

Rename these functions to write_object_file and
write_object_file_prepare respectively.

Replace sha1_to_hex, hashcpy and hashclr with their oid equivalents
wherever possible.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 apply.c                  |  8 ++++----
 builtin/checkout.c       |  3 +--
 builtin/mktag.c          |  6 +++---
 builtin/mktree.c         | 10 +++++-----
 builtin/notes.c          |  8 ++++----
 builtin/receive-pack.c   | 11 ++++++-----
 builtin/replace.c        |  2 +-
 builtin/tag.c            |  2 +-
 builtin/unpack-objects.c |  9 ++++++---
 cache-tree.c             |  5 +++--
 cache.h                  |  4 +++-
 commit.c                 |  2 +-
 match-trees.c            |  2 +-
 merge-recursive.c        |  5 +++--
 notes-cache.c            |  2 +-
 notes.c                  |  9 ++++-----
 read-cache.c             |  6 +++---
 sha1_file.c              | 29 +++++++++++++++--------------
 18 files changed, 65 insertions(+), 58 deletions(-)

diff --git a/apply.c b/apply.c
index 57ab8a8a29..4cd4504008 100644
--- a/apply.c
+++ b/apply.c
@@ -3554,7 +3554,7 @@ static int try_threeway(struct apply_state *state,
 
 	/* Preimage the patch was prepared for */
 	if (patch->is_new)
-		write_sha1_file("", 0, blob_type, pre_oid.hash);
+		write_object_file("", 0, blob_type, &pre_oid);
 	else if (get_oid(patch->old_sha1_prefix, &pre_oid) ||
 		 read_blob_object(&buf, &pre_oid, patch->old_mode))
 		return error(_("repository lacks the necessary blob to fall back on 3-way merge."));
@@ -3570,7 +3570,7 @@ static int try_threeway(struct apply_state *state,
 		return -1;
 	}
 	/* post_oid is theirs */
-	write_sha1_file(tmp_image.buf, tmp_image.len, blob_type, post_oid.hash);
+	write_object_file(tmp_image.buf, tmp_image.len, blob_type, &post_oid);
 	clear_image(&tmp_image);
 
 	/* our_oid is ours */
@@ -3583,7 +3583,7 @@ static int try_threeway(struct apply_state *state,
 			return error(_("cannot read the current contents of '%s'"),
 				     patch->old_name);
 	}
-	write_sha1_file(tmp_image.buf, tmp_image.len, blob_type, our_oid.hash);
+	write_object_file(tmp_image.buf, tmp_image.len, blob_type, &our_oid);
 	clear_image(&tmp_image);
 
 	/* in-core three-way merge between post and our using pre as base */
@@ -4291,7 +4291,7 @@ static int add_index_file(struct apply_state *state,
 			}
 			fill_stat_cache_info(ce, &st);
 		}
-		if (write_sha1_file(buf, size, blob_type, ce->oid.hash) < 0) {
+		if (write_object_file(buf, size, blob_type, &ce->oid) < 0) {
 			free(ce);
 			return error(_("unable to create backing store "
 				       "for newly created file %s"), path);
diff --git a/builtin/checkout.c b/builtin/checkout.c
index c54c78df54..191b96c49c 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -227,8 +227,7 @@ static int checkout_merged(int pos, const struct checkout *state)
 	 * (it also writes the merge result to the object database even
 	 * when it may contain conflicts).
 	 */
-	if (write_sha1_file(result_buf.ptr, result_buf.size,
-			    blob_type, oid.hash))
+	if (write_object_file(result_buf.ptr, result_buf.size, blob_type, &oid))
 		die(_("Unable to add merge result for '%s'"), path);
 	free(result_buf.ptr);
 	ce = make_cache_entry(mode, oid.hash, path, 2, 0);
diff --git a/builtin/mktag.c b/builtin/mktag.c
index 031b750f06..beb552847b 100644
--- a/builtin/mktag.c
+++ b/builtin/mktag.c
@@ -151,7 +151,7 @@ static int verify_tag(char *buffer, unsigned long size)
 int cmd_mktag(int argc, const char **argv, const char *prefix)
 {
 	struct strbuf buf = STRBUF_INIT;
-	unsigned char result_sha1[20];
+	struct object_id result;
 
 	if (argc != 1)
 		usage("git mktag");
@@ -165,10 +165,10 @@ int cmd_mktag(int argc, const char **argv, const char *prefix)
 	if (verify_tag(buf.buf, buf.len) < 0)
 		die("invalid tag signature file");
 
-	if (write_sha1_file(buf.buf, buf.len, tag_type, result_sha1) < 0)
+	if (write_object_file(buf.buf, buf.len, tag_type, &result) < 0)
 		die("unable to write tag file");
 
 	strbuf_release(&buf);
-	printf("%s\n", sha1_to_hex(result_sha1));
+	printf("%s\n", oid_to_hex(&result));
 	return 0;
 }
diff --git a/builtin/mktree.c b/builtin/mktree.c
index da0fd8cd70..8dd9f52f77 100644
--- a/builtin/mktree.c
+++ b/builtin/mktree.c
@@ -40,7 +40,7 @@ static int ent_compare(const void *a_, const void *b_)
 				 b->name, b->len, b->mode);
 }
 
-static void write_tree(unsigned char *sha1)
+static void write_tree(struct object_id *oid)
 {
 	struct strbuf buf;
 	size_t size;
@@ -57,7 +57,7 @@ static void write_tree(unsigned char *sha1)
 		strbuf_add(&buf, ent->sha1, 20);
 	}
 
-	write_sha1_file(buf.buf, buf.len, tree_type, sha1);
+	write_object_file(buf.buf, buf.len, tree_type, oid);
 	strbuf_release(&buf);
 }
 
@@ -142,7 +142,7 @@ static void mktree_line(char *buf, size_t len, int nul_term_line, int allow_miss
 int cmd_mktree(int ac, const char **av, const char *prefix)
 {
 	struct strbuf sb = STRBUF_INIT;
-	unsigned char sha1[20];
+	struct object_id oid;
 	int nul_term_line = 0;
 	int allow_missing = 0;
 	int is_batch_mode = 0;
@@ -181,8 +181,8 @@ int cmd_mktree(int ac, const char **av, const char *prefix)
 			 */
 			; /* skip creating an empty tree */
 		} else {
-			write_tree(sha1);
-			puts(sha1_to_hex(sha1));
+			write_tree(&oid);
+			puts(oid_to_hex(&oid));
 			fflush(stdout);
 		}
 		used=0; /* reset tree entry buffer for re-use in batch mode */
diff --git a/builtin/notes.c b/builtin/notes.c
index 7c81761645..39304ba743 100644
--- a/builtin/notes.c
+++ b/builtin/notes.c
@@ -198,9 +198,9 @@ static void prepare_note_data(const struct object_id *object, struct note_data *
 	}
 }
 
-static void write_note_data(struct note_data *d, unsigned char *sha1)
+static void write_note_data(struct note_data *d, struct object_id *oid)
 {
-	if (write_sha1_file(d->buf.buf, d->buf.len, blob_type, sha1)) {
+	if (write_object_file(d->buf.buf, d->buf.len, blob_type, oid)) {
 		error(_("unable to write note object"));
 		if (d->edit_path)
 			error(_("the note contents have been left in %s"),
@@ -459,7 +459,7 @@ static int add(int argc, const char **argv, const char *prefix)
 
 	prepare_note_data(&object, &d, note ? note->hash : NULL);
 	if (d.buf.len || allow_empty) {
-		write_note_data(&d, new_note.hash);
+		write_note_data(&d, &new_note);
 		if (add_note(t, &object, &new_note, combine_notes_overwrite))
 			die("BUG: combine_notes_overwrite failed");
 		commit_notes(t, "Notes added by 'git notes add'");
@@ -619,7 +619,7 @@ static int append_edit(int argc, const char **argv, const char *prefix)
 	}
 
 	if (d.buf.len || allow_empty) {
-		write_note_data(&d, new_note.hash);
+		write_note_data(&d, &new_note);
 		if (add_note(t, &object, &new_note, combine_notes_overwrite))
 			die("BUG: combine_notes_overwrite failed");
 		logmsg = xstrfmt("Notes added by 'git notes %s'", argv[0]);
diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index b7ce7c7f52..75e7f18ace 100644
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -69,7 +69,7 @@ static int sent_capabilities;
 static int shallow_update;
 static const char *alt_shallow_file;
 static struct strbuf push_cert = STRBUF_INIT;
-static unsigned char push_cert_sha1[20];
+static struct object_id push_cert_oid;
 static struct signature_check sigcheck;
 static const char *push_cert_nonce;
 static const char *cert_nonce_seed;
@@ -633,8 +633,9 @@ static void prepare_push_cert_sha1(struct child_process *proc)
 		int bogs /* beginning_of_gpg_sig */;
 
 		already_done = 1;
-		if (write_sha1_file(push_cert.buf, push_cert.len, "blob", push_cert_sha1))
-			hashclr(push_cert_sha1);
+		if (write_object_file(push_cert.buf, push_cert.len, "blob",
+				      &push_cert_oid))
+			oidclr(&push_cert_oid);
 
 		memset(&sigcheck, '\0', sizeof(sigcheck));
 		sigcheck.result = 'N';
@@ -655,9 +656,9 @@ static void prepare_push_cert_sha1(struct child_process *proc)
 		strbuf_release(&gpg_status);
 		nonce_status = check_nonce(push_cert.buf, bogs);
 	}
-	if (!is_null_sha1(push_cert_sha1)) {
+	if (!is_null_oid(&push_cert_oid)) {
 		argv_array_pushf(&proc->env_array, "GIT_PUSH_CERT=%s",
-				 sha1_to_hex(push_cert_sha1));
+				 oid_to_hex(&push_cert_oid));
 		argv_array_pushf(&proc->env_array, "GIT_PUSH_CERT_SIGNER=%s",
 				 sigcheck.signer ? sigcheck.signer : "");
 		argv_array_pushf(&proc->env_array, "GIT_PUSH_CERT_KEY=%s",
diff --git a/builtin/replace.c b/builtin/replace.c
index 814bf6bfde..83d3235721 100644
--- a/builtin/replace.c
+++ b/builtin/replace.c
@@ -410,7 +410,7 @@ static int create_graft(int argc, const char **argv, int force)
 
 	check_mergetags(commit, argc, argv);
 
-	if (write_sha1_file(buf.buf, buf.len, commit_type, new.hash))
+	if (write_object_file(buf.buf, buf.len, commit_type, &new))
 		die(_("could not write replacement commit for: '%s'"), old_ref);
 
 	strbuf_release(&buf);
diff --git a/builtin/tag.c b/builtin/tag.c
index a7e6a5b0f2..8885e21ddc 100644
--- a/builtin/tag.c
+++ b/builtin/tag.c
@@ -187,7 +187,7 @@ static int build_tag_object(struct strbuf *buf, int sign, struct object_id *resu
 {
 	if (sign && do_sign(buf) < 0)
 		return error(_("unable to sign the tag"));
-	if (write_sha1_file(buf->buf, buf->len, tag_type, result->hash) < 0)
+	if (write_object_file(buf->buf, buf->len, tag_type, result) < 0)
 		return error(_("unable to write tag file"));
 	return 0;
 }
diff --git a/builtin/unpack-objects.c b/builtin/unpack-objects.c
index 85a40d1af7..397371eb3d 100644
--- a/builtin/unpack-objects.c
+++ b/builtin/unpack-objects.c
@@ -172,7 +172,8 @@ static void write_cached_object(struct object *obj, struct obj_buffer *obj_buf)
 {
 	struct object_id oid;
 
-	if (write_sha1_file(obj_buf->buffer, obj_buf->size, typename(obj->type), oid.hash) < 0)
+	if (write_object_file(obj_buf->buffer, obj_buf->size,
+			      typename(obj->type), &oid) < 0)
 		die("failed to write object %s", oid_to_hex(&obj->oid));
 	obj->flags |= FLAG_WRITTEN;
 }
@@ -237,14 +238,16 @@ static void write_object(unsigned nr, enum object_type type,
 			 void *buf, unsigned long size)
 {
 	if (!strict) {
-		if (write_sha1_file(buf, size, typename(type), obj_list[nr].oid.hash) < 0)
+		if (write_object_file(buf, size, typename(type),
+				      &obj_list[nr].oid) < 0)
 			die("failed to write object");
 		added_object(nr, type, buf, size);
 		free(buf);
 		obj_list[nr].obj = NULL;
 	} else if (type == OBJ_BLOB) {
 		struct blob *blob;
-		if (write_sha1_file(buf, size, typename(type), obj_list[nr].oid.hash) < 0)
+		if (write_object_file(buf, size, typename(type),
+				      &obj_list[nr].oid) < 0)
 			die("failed to write object");
 		added_object(nr, type, buf, size);
 		free(buf);
diff --git a/cache-tree.c b/cache-tree.c
index 6574eeb80d..597114f604 100644
--- a/cache-tree.c
+++ b/cache-tree.c
@@ -406,9 +406,10 @@ static int update_one(struct cache_tree *it,
 			oidcpy(&it->oid, &oid);
 		else
 			to_invalidate = 1;
-	} else if (dryrun)
+	} else if (dryrun) {
 		hash_object_file(buffer.buf, buffer.len, tree_type, &it->oid);
-	else if (write_sha1_file(buffer.buf, buffer.len, tree_type, it->oid.hash)) {
+	} else if (write_object_file(buffer.buf, buffer.len, tree_type,
+				     &it->oid)) {
 		strbuf_release(&buffer);
 		return -1;
 	}
diff --git a/cache.h b/cache.h
index d5d78d6a51..d80141eb64 100644
--- a/cache.h
+++ b/cache.h
@@ -1240,7 +1240,9 @@ extern int sha1_object_info(const unsigned char *, unsigned long *);
 extern int hash_object_file(const void *buf, unsigned long len,
 			    const char *type, struct object_id *oid);
 
-extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
+extern int write_object_file(const void *buf, unsigned long len,
+			     const char *type, struct object_id *oid);
+
 extern int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type, struct object_id *oid, unsigned flags);
 
 extern int pretend_object_file(void *, unsigned long, enum object_type,
diff --git a/commit.c b/commit.c
index 643f3daec3..0d32532872 100644
--- a/commit.c
+++ b/commit.c
@@ -1567,7 +1567,7 @@ int commit_tree_extended(const char *msg, size_t msg_len,
 		goto out;
 	}
 
-	result = write_sha1_file(buffer.buf, buffer.len, commit_type, ret->hash);
+	result = write_object_file(buffer.buf, buffer.len, commit_type, ret);
 out:
 	strbuf_release(&buffer);
 	return result;
diff --git a/match-trees.c b/match-trees.c
index afb771c4f5..0ca99d5162 100644
--- a/match-trees.c
+++ b/match-trees.c
@@ -214,7 +214,7 @@ static int splice_tree(const struct object_id *oid1, const char *prefix,
 		rewrite_with = oid2;
 	}
 	oidcpy(rewrite_here, rewrite_with);
-	status = write_sha1_file(buf, sz, tree_type, result->hash);
+	status = write_object_file(buf, sz, tree_type, result);
 	free(buf);
 	return status;
 }
diff --git a/merge-recursive.c b/merge-recursive.c
index cc5fa0a949..fe3c0c8076 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -1009,8 +1009,9 @@ static int merge_file_1(struct merge_options *o,
 			if ((merge_status < 0) || !result_buf.ptr)
 				ret = err(o, _("Failed to execute internal merge"));
 
-			if (!ret && write_sha1_file(result_buf.ptr, result_buf.size,
-						    blob_type, result->oid.hash))
+			if (!ret &&
+			    write_object_file(result_buf.ptr, result_buf.size,
+					      blob_type, &result->oid))
 				ret = err(o, _("Unable to add %s to database"),
 					  a->path);
 
diff --git a/notes-cache.c b/notes-cache.c
index 010ad236cb..398e61d5e9 100644
--- a/notes-cache.c
+++ b/notes-cache.c
@@ -88,7 +88,7 @@ int notes_cache_put(struct notes_cache *c, struct object_id *key_oid,
 {
 	struct object_id value_oid;
 
-	if (write_sha1_file(data, size, "blob", value_oid.hash) < 0)
+	if (write_object_file(data, size, "blob", &value_oid) < 0)
 		return -1;
 	return add_note(&c->tree, key_oid, &value_oid, NULL);
 }
diff --git a/notes.c b/notes.c
index 09ef1ce33a..ce9a8f53f8 100644
--- a/notes.c
+++ b/notes.c
@@ -667,7 +667,7 @@ static int tree_write_stack_finish_subtree(struct tree_write_stack *tws)
 		ret = tree_write_stack_finish_subtree(n);
 		if (ret)
 			return ret;
-		ret = write_sha1_file(n->buf.buf, n->buf.len, tree_type, s.hash);
+		ret = write_object_file(n->buf.buf, n->buf.len, tree_type, &s);
 		if (ret)
 			return ret;
 		strbuf_release(&n->buf);
@@ -825,7 +825,7 @@ int combine_notes_concatenate(struct object_id *cur_oid,
 	free(new_msg);
 
 	/* create a new blob object from buf */
-	ret = write_sha1_file(buf, buf_len, blob_type, cur_oid->hash);
+	ret = write_object_file(buf, buf_len, blob_type, cur_oid);
 	free(buf);
 	return ret;
 }
@@ -905,7 +905,7 @@ int combine_notes_cat_sort_uniq(struct object_id *cur_oid,
 				 string_list_join_lines_helper, &buf))
 		goto out;
 
-	ret = write_sha1_file(buf.buf, buf.len, blob_type, cur_oid->hash);
+	ret = write_object_file(buf.buf, buf.len, blob_type, cur_oid);
 
 out:
 	strbuf_release(&buf);
@@ -1147,8 +1147,7 @@ int write_notes_tree(struct notes_tree *t, struct object_id *result)
 	ret = for_each_note(t, flags, write_each_note, &cb_data) ||
 	      write_each_non_note_until(NULL, &cb_data) ||
 	      tree_write_stack_finish_subtree(&root) ||
-	      write_sha1_file(root.buf.buf, root.buf.len, tree_type,
-			      result->hash);
+	      write_object_file(root.buf.buf, root.buf.len, tree_type, result);
 	strbuf_release(&root.buf);
 	return ret;
 }
diff --git a/read-cache.c b/read-cache.c
index 2eb81a66b9..01bcf7dd84 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -631,10 +631,10 @@ static struct cache_entry *create_alias_ce(struct index_state *istate,
 
 void set_object_name_for_intent_to_add_entry(struct cache_entry *ce)
 {
-	unsigned char sha1[20];
-	if (write_sha1_file("", 0, blob_type, sha1))
+	struct object_id oid;
+	if (write_object_file("", 0, blob_type, &oid))
 		die("cannot create an empty blob in the object database");
-	hashcpy(ce->oid.hash, sha1);
+	oidcpy(&ce->oid, &oid);
 }
 
 int add_to_index(struct index_state *istate, const char *path, struct stat *st, int flags)
diff --git a/sha1_file.c b/sha1_file.c
index 4c44c60cec..d1569b1b96 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1419,9 +1419,9 @@ void *read_object_with_reference(const unsigned char *sha1,
 	}
 }
 
-static void write_sha1_file_prepare(const void *buf, unsigned long len,
-                                    const char *type, unsigned char *sha1,
-                                    char *hdr, int *hdrlen)
+static void write_object_file_prepare(const void *buf, unsigned long len,
+				      const char *type, struct object_id *oid,
+				      char *hdr, int *hdrlen)
 {
 	git_SHA_CTX c;
 
@@ -1432,7 +1432,7 @@ static void write_sha1_file_prepare(const void *buf, unsigned long len,
 	git_SHA1_Init(&c);
 	git_SHA1_Update(&c, hdr, *hdrlen);
 	git_SHA1_Update(&c, buf, len);
-	git_SHA1_Final(sha1, &c);
+	git_SHA1_Final(oid->hash, &c);
 }
 
 /*
@@ -1490,7 +1490,7 @@ int hash_object_file(const void *buf, unsigned long len, const char *type,
 {
 	char hdr[32];
 	int hdrlen = sizeof(hdr);
-	write_sha1_file_prepare(buf, len, type, oid->hash, hdr, &hdrlen);
+	write_object_file_prepare(buf, len, type, oid, hdr, &hdrlen);
 	return 0;
 }
 
@@ -1633,7 +1633,8 @@ static int freshen_packed_object(const unsigned char *sha1)
 	return 1;
 }
 
-int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1)
+int write_object_file(const void *buf, unsigned long len, const char *type,
+		      struct object_id *oid)
 {
 	char hdr[32];
 	int hdrlen = sizeof(hdr);
@@ -1641,10 +1642,10 @@ int write_sha1_file(const void *buf, unsigned long len, const char *type, unsign
 	/* Normally if we have it in the pack then we do not bother writing
 	 * it out into .git/objects/??/?{38} file.
 	 */
-	write_sha1_file_prepare(buf, len, type, sha1, hdr, &hdrlen);
-	if (freshen_packed_object(sha1) || freshen_loose_object(sha1))
+	write_object_file_prepare(buf, len, type, oid, hdr, &hdrlen);
+	if (freshen_packed_object(oid->hash) || freshen_loose_object(oid->hash))
 		return 0;
-	return write_loose_object(sha1, hdr, hdrlen, buf, len, 0);
+	return write_loose_object(oid->hash, hdr, hdrlen, buf, len, 0);
 }
 
 int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type,
@@ -1656,7 +1657,7 @@ int hash_sha1_file_literally(const void *buf, unsigned long len, const char *typ
 	/* type string, SP, %lu of the length plus NUL must fit this */
 	hdrlen = strlen(type) + 32;
 	header = xmalloc(hdrlen);
-	write_sha1_file_prepare(buf, len, type, oid->hash, header, &hdrlen);
+	write_object_file_prepare(buf, len, type, oid, header, &hdrlen);
 
 	if (!(flags & HASH_WRITE_OBJECT))
 		goto cleanup;
@@ -1767,7 +1768,7 @@ static int index_mem(struct object_id *oid, void *buf, size_t size,
 	}
 
 	if (write_object)
-		ret = write_sha1_file(buf, size, typename(type), oid->hash);
+		ret = write_object_file(buf, size, typename(type), oid);
 	else
 		ret = hash_object_file(buf, size, typename(type), oid);
 	if (re_allocated)
@@ -1789,8 +1790,8 @@ static int index_stream_convert_blob(struct object_id *oid, int fd,
 				 get_safe_crlf(flags));
 
 	if (write_object)
-		ret = write_sha1_file(sbuf.buf, sbuf.len, typename(OBJ_BLOB),
-				      oid->hash);
+		ret = write_object_file(sbuf.buf, sbuf.len, typename(OBJ_BLOB),
+					oid);
 	else
 		ret = hash_object_file(sbuf.buf, sbuf.len, typename(OBJ_BLOB),
 				       oid);
@@ -1908,7 +1909,7 @@ int index_path(struct object_id *oid, const char *path, struct stat *st, unsigne
 			return error_errno("readlink(\"%s\")", path);
 		if (!(flags & HASH_WRITE_OBJECT))
 			hash_object_file(sb.buf, sb.len, blob_type, oid);
-		else if (write_sha1_file(sb.buf, sb.len, blob_type, oid->hash))
+		else if (write_object_file(sb.buf, sb.len, blob_type, oid))
 			rc = error("%s: failed to insert into database", path);
 		strbuf_release(&sb);
 		break;
-- 
2.14.3

[PATCH v3 12/14] sha1_file: convert force_object_loose to object_id

[Patryk Obara]

Convert the definition and declaration of force_object_loose to
struct object_id and adjust usage of this function.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 builtin/pack-objects.c |  2 +-
 cache.h                |  3 ++-
 sha1_file.c            | 10 +++++-----
 3 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/builtin/pack-objects.c b/builtin/pack-objects.c
index 6b9cfc289d..f38197543d 100644
--- a/builtin/pack-objects.c
+++ b/builtin/pack-objects.c
@@ -2768,7 +2768,7 @@ static void loosen_unused_packed_objects(struct rev_info *revs)
 			if (!packlist_find(&to_pack, oid.hash, NULL) &&
 			    !has_sha1_pack_kept_or_nonlocal(&oid) &&
 			    !loosened_object_can_be_discarded(&oid, p->mtime))
-				if (force_object_loose(oid.hash, p->mtime))
+				if (force_object_loose(&oid, p->mtime))
 					die("unable to force loose object");
 		}
 	}
diff --git a/cache.h b/cache.h
index d80141eb64..0a8be9c87f 100644
--- a/cache.h
+++ b/cache.h
@@ -1248,7 +1248,8 @@ extern int hash_sha1_file_literally(const void *buf, unsigned long len, const ch
 extern int pretend_object_file(void *, unsigned long, enum object_type,
 			       struct object_id *oid);
 
-extern int force_object_loose(const unsigned char *sha1, time_t mtime);
+extern int force_object_loose(const struct object_id *oid, time_t mtime);
+
 extern int git_open_cloexec(const char *name, int flags);
 #define git_open(name) git_open_cloexec(name, O_RDONLY)
 extern void *map_sha1_file(const unsigned char *sha1, unsigned long *size);
diff --git a/sha1_file.c b/sha1_file.c
index d1569b1b96..d9ee966d74 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1670,7 +1670,7 @@ int hash_sha1_file_literally(const void *buf, unsigned long len, const char *typ
 	return status;
 }
 
-int force_object_loose(const unsigned char *sha1, time_t mtime)
+int force_object_loose(const struct object_id *oid, time_t mtime)
 {
 	void *buf;
 	unsigned long len;
@@ -1679,13 +1679,13 @@ int force_object_loose(const unsigned char *sha1, time_t mtime)
 	int hdrlen;
 	int ret;
 
-	if (has_loose_object(sha1))
+	if (has_loose_object(oid->hash))
 		return 0;
-	buf = read_object(sha1, &type, &len);
+	buf = read_object(oid->hash, &type, &len);
 	if (!buf)
-		return error("cannot read sha1_file for %s", sha1_to_hex(sha1));
+		return error("cannot read sha1_file for %s", oid_to_hex(oid));
 	hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %lu", typename(type), len) + 1;
-	ret = write_loose_object(sha1, hdr, hdrlen, buf, len, mtime);
+	ret = write_loose_object(oid->hash, hdr, hdrlen, buf, len, mtime);
 	free(buf);
 
 	return ret;
-- 
2.14.3

[PATCH v3 13/14] sha1_file: convert write_loose_object to object_id

[Patryk Obara]

Convert the definition and declaration of statis write_loose_object
function to struct object_id.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 sha1_file.c | 28 ++++++++++++++++------------
 1 file changed, 16 insertions(+), 12 deletions(-)

diff --git a/sha1_file.c b/sha1_file.c
index d9ee966d74..59238f5bea 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1548,16 +1548,17 @@ static int create_tmpfile(struct strbuf *tmp, const char *filename)
 	return fd;
 }
 
-static int write_loose_object(const unsigned char *sha1, char *hdr, int hdrlen,
-			      const void *buf, unsigned long len, time_t mtime)
+static int write_loose_object(const struct object_id *oid, char *hdr,
+			      int hdrlen, const void *buf, unsigned long len,
+			      time_t mtime)
 {
 	int fd, ret;
 	unsigned char compressed[4096];
 	git_zstream stream;
 	git_SHA_CTX c;
-	unsigned char parano_sha1[20];
+	struct object_id parano_oid;
 	static struct strbuf tmp_file = STRBUF_INIT;
-	const char *filename = sha1_file_name(sha1);
+	const char *filename = sha1_file_name(oid->hash);
 
 	fd = create_tmpfile(&tmp_file, filename);
 	if (fd < 0) {
@@ -1594,13 +1595,16 @@ static int write_loose_object(const unsigned char *sha1, char *hdr, int hdrlen,
 	} while (ret == Z_OK);
 
 	if (ret != Z_STREAM_END)
-		die("unable to deflate new object %s (%d)", sha1_to_hex(sha1), ret);
+		die("unable to deflate new object %s (%d)", oid_to_hex(oid),
+		    ret);
 	ret = git_deflate_end_gently(&stream);
 	if (ret != Z_OK)
-		die("deflateEnd on object %s failed (%d)", sha1_to_hex(sha1), ret);
-	git_SHA1_Final(parano_sha1, &c);
-	if (hashcmp(sha1, parano_sha1) != 0)
-		die("confused by unstable object source data for %s", sha1_to_hex(sha1));
+		die("deflateEnd on object %s failed (%d)", oid_to_hex(oid),
+		    ret);
+	git_SHA1_Final(parano_oid.hash, &c);
+	if (oidcmp(oid, &parano_oid) != 0)
+		die("confused by unstable object source data for %s",
+		    oid_to_hex(oid));
 
 	close_sha1_file(fd);
 
@@ -1645,7 +1649,7 @@ int write_object_file(const void *buf, unsigned long len, const char *type,
 	write_object_file_prepare(buf, len, type, oid, hdr, &hdrlen);
 	if (freshen_packed_object(oid->hash) || freshen_loose_object(oid->hash))
 		return 0;
-	return write_loose_object(oid->hash, hdr, hdrlen, buf, len, 0);
+	return write_loose_object(oid, hdr, hdrlen, buf, len, 0);
 }
 
 int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type,
@@ -1663,7 +1667,7 @@ int hash_sha1_file_literally(const void *buf, unsigned long len, const char *typ
 		goto cleanup;
 	if (freshen_packed_object(oid->hash) || freshen_loose_object(oid->hash))
 		goto cleanup;
-	status = write_loose_object(oid->hash, header, hdrlen, buf, len, 0);
+	status = write_loose_object(oid, header, hdrlen, buf, len, 0);
 
 cleanup:
 	free(header);
@@ -1685,7 +1689,7 @@ int force_object_loose(const struct object_id *oid, time_t mtime)
 	if (!buf)
 		return error("cannot read sha1_file for %s", oid_to_hex(oid));
 	hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %lu", typename(type), len) + 1;
-	ret = write_loose_object(oid->hash, hdr, hdrlen, buf, len, mtime);
+	ret = write_loose_object(oid, hdr, hdrlen, buf, len, mtime);
 	free(buf);
 
 	return ret;
-- 
2.14.3

Re: [PATCH v3 13/14] sha1_file: convert write_loose_object to object_id

[brian m. carlson]

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On Wed, Jan 24, 2018 at 12:12:05PM +0100, Patryk Obara wrote:
> Convert the definition and declaration of statis write_loose_object

s/statis/static/
-- 
brian m. carlson / brian with sandals: Houston, Texas, US
https://www.crustytoothpaste.net/~bmc | My opinion only
OpenPGP: https://keybase.io/bk2204

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[PATCH v3 14/14] sha1_file: rename hash_sha1_file_literally

[Patryk Obara]

This function was already converted to use struct object_id earlier.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 builtin/hash-object.c | 3 ++-
 cache.h               | 4 +++-
 sha1_file.c           | 5 +++--
 3 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/builtin/hash-object.c b/builtin/hash-object.c
index c532ff9320..526da5c185 100644
--- a/builtin/hash-object.c
+++ b/builtin/hash-object.c
@@ -24,7 +24,8 @@ static int hash_literally(struct object_id *oid, int fd, const char *type, unsig
 	if (strbuf_read(&buf, fd, 4096) < 0)
 		ret = -1;
 	else
-		ret = hash_sha1_file_literally(buf.buf, buf.len, type, oid, flags);
+		ret = hash_object_file_literally(buf.buf, buf.len, type, oid,
+						 flags);
 	strbuf_release(&buf);
 	return ret;
 }
diff --git a/cache.h b/cache.h
index 0a8be9c87f..6ef4248931 100644
--- a/cache.h
+++ b/cache.h
@@ -1243,7 +1243,9 @@ extern int hash_object_file(const void *buf, unsigned long len,
 extern int write_object_file(const void *buf, unsigned long len,
 			     const char *type, struct object_id *oid);
 
-extern int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type, struct object_id *oid, unsigned flags);
+extern int hash_object_file_literally(const void *buf, unsigned long len,
+				      const char *type, struct object_id *oid,
+				      unsigned flags);
 
 extern int pretend_object_file(void *, unsigned long, enum object_type,
 			       struct object_id *oid);
diff --git a/sha1_file.c b/sha1_file.c
index 59238f5bea..34c041e8cd 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1652,8 +1652,9 @@ int write_object_file(const void *buf, unsigned long len, const char *type,
 	return write_loose_object(oid, hdr, hdrlen, buf, len, 0);
 }
 
-int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type,
-			     struct object_id *oid, unsigned flags)
+int hash_object_file_literally(const void *buf, unsigned long len,
+			       const char *type, struct object_id *oid,
+			       unsigned flags)
 {
 	char *header;
 	int hdrlen, status = 0;
-- 
2.14.3

Re: [PATCH v3 00/14] Some fixes and bunch of object_id conversions

[Junio C Hamano]

Patryk Obara <patryk.obara@gmail.com> writes:

> Compared to v2:
>
> * rebased to latest master
>
> * patch 1 and 2
> I kept them in, but if Junio prefers them separately then I'll send
> them as separate patches.

It's not just me, but I think they should be separated out (I can
just queue them separately, and there is no need to resend them
unless/until they need to be updated for their own reason).

Re: [PATCH v3 00/14] Some fixes and bunch of object_id conversions

[Junio C Hamano]

Patryk Obara <patryk.obara@gmail.com> writes:

> Patryk Obara (14):
>   http-push: improve error log
>   clang-format: adjust penalty for return type line break
>   sha1_file: convert pretend_sha1_file to object_id
>   dir: convert struct sha1_stat to use object_id
>   sha1_file: convert hash_sha1_file to object_id
>   cache: clear whole hash buffer with oidclr
>   match-trees: convert splice_tree to object_id
>   commit: convert commit_tree* to object_id
>   notes: convert combine_notes_* to object_id
>   notes: convert write_notes_tree to object_id
>   sha1_file: convert write_sha1_file to object_id
>   sha1_file: convert force_object_loose to object_id
>   sha1_file: convert write_loose_object to object_id
>   sha1_file: rename hash_sha1_file_literally

These were mostly pleasant read.  I'll queue these on two topic
branches and wait to see what others say.

Thanks.

Re: [PATCH v3 00/14] Some fixes and bunch of object_id conversions

[Duy Nguyen]

On Thu, Jan 25, 2018 at 4:41 AM, Junio C Hamano <gitster@pobox.com> wrote:
> Patryk Obara <patryk.obara@gmail.com> writes:
>
>> Patryk Obara (14):
>>   http-push: improve error log
>>   clang-format: adjust penalty for return type line break
>>   sha1_file: convert pretend_sha1_file to object_id
>>   dir: convert struct sha1_stat to use object_id
>>   sha1_file: convert hash_sha1_file to object_id
>>   cache: clear whole hash buffer with oidclr
>>   match-trees: convert splice_tree to object_id
>>   commit: convert commit_tree* to object_id
>>   notes: convert combine_notes_* to object_id
>>   notes: convert write_notes_tree to object_id
>>   sha1_file: convert write_sha1_file to object_id
>>   sha1_file: convert force_object_loose to object_id
>>   sha1_file: convert write_loose_object to object_id
>>   sha1_file: rename hash_sha1_file_literally
>
> These were mostly pleasant read.  I'll queue these on two topic
> branches and wait to see what others say.

Looks good to me too.
-- 
Duy

Re: [PATCH v3 00/14] Some fixes and bunch of object_id conversions

[brian m. carlson]

[-- Attachment #1: Type: text/plain, Size: 1201 bytes --]

On Wed, Jan 24, 2018 at 01:41:07PM -0800, Junio C Hamano wrote:
> Patryk Obara <patryk.obara@gmail.com> writes:
> 
> > Patryk Obara (14):
> >   http-push: improve error log
> >   clang-format: adjust penalty for return type line break
> >   sha1_file: convert pretend_sha1_file to object_id
> >   dir: convert struct sha1_stat to use object_id
> >   sha1_file: convert hash_sha1_file to object_id
> >   cache: clear whole hash buffer with oidclr
> >   match-trees: convert splice_tree to object_id
> >   commit: convert commit_tree* to object_id
> >   notes: convert combine_notes_* to object_id
> >   notes: convert write_notes_tree to object_id
> >   sha1_file: convert write_sha1_file to object_id
> >   sha1_file: convert force_object_loose to object_id
> >   sha1_file: convert write_loose_object to object_id
> >   sha1_file: rename hash_sha1_file_literally
> 
> These were mostly pleasant read.  I'll queue these on two topic
> branches and wait to see what others say.

Other than the one typo, looks good to me.
-- 
brian m. carlson / brian with sandals: Houston, Texas, US
https://www.crustytoothpaste.net/~bmc | My opinion only
OpenPGP: https://keybase.io/bk2204

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[PATCH v4 00/12] A bunch of object_id conversions

[Patryk Obara]

Thank you, everyone, for review and thanks, Junio for queueing two
first patches - I removed them from v4, as there were no more comments
to them anyway.

Compared to v3:

Patch 2 (formerly 4)
- renamed all parameter names sha1_stat to oid_stat
- renamed static function load sha1_stat to load_oid_stat
- adjusted a comment, that included "sha1_stat" in text

Patch 11 (formerly 13)
- fixed a typo in the commit message

Hopefully, this will be the last iteration on this batch of object_id
conversions; I already have next batch prepared (I just need to clean
it up before sending).

Patryk Obara (12):
  sha1_file: convert pretend_sha1_file to object_id
  dir: convert struct sha1_stat to use object_id
  sha1_file: convert hash_sha1_file to object_id
  cache: clear whole hash buffer with oidclr
  match-trees: convert splice_tree to object_id
  commit: convert commit_tree* to object_id
  notes: convert combine_notes_* to object_id
  notes: convert write_notes_tree to object_id
  sha1_file: convert write_sha1_file to object_id
  sha1_file: convert force_object_loose to object_id
  sha1_file: convert write_loose_object to object_id
  sha1_file: rename hash_sha1_file_literally

 Documentation/technical/api-object-access.txt |   2 +-
 apply.c                                       |  12 +--
 blame.c                                       |   2 +-
 builtin/am.c                                  |   4 +-
 builtin/checkout.c                            |   3 +-
 builtin/commit-tree.c                         |   4 +-
 builtin/commit.c                              |   5 +-
 builtin/hash-object.c                         |   3 +-
 builtin/index-pack.c                          |   5 +-
 builtin/merge.c                               |   8 +-
 builtin/mktag.c                               |   6 +-
 builtin/mktree.c                              |  10 +--
 builtin/notes.c                               |   8 +-
 builtin/pack-objects.c                        |   2 +-
 builtin/receive-pack.c                        |  11 +--
 builtin/replace.c                             |   4 +-
 builtin/tag.c                                 |   2 +-
 builtin/unpack-objects.c                      |  11 ++-
 cache-tree.c                                  |  16 ++--
 cache.h                                       |  25 +++++--
 commit.c                                      |  15 ++--
 commit.h                                      |  11 +--
 convert.c                                     |   6 +-
 diffcore-rename.c                             |   4 +-
 dir.c                                         | 104 +++++++++++++-------------
 dir.h                                         |  12 +--
 log-tree.c                                    |   2 +-
 match-trees.c                                 |  46 ++++++------
 merge-recursive.c                             |   5 +-
 notes-cache.c                                 |   8 +-
 notes-merge.c                                 |   9 +--
 notes-utils.c                                 |   9 ++-
 notes-utils.h                                 |   3 +-
 notes.c                                       |  63 ++++++++--------
 notes.h                                       |  29 ++++---
 read-cache.c                                  |   6 +-
 sha1_file.c                                   | 100 +++++++++++++------------
 t/helper/test-dump-untracked-cache.c          |   4 +-
 38 files changed, 300 insertions(+), 279 deletions(-)


base-commit: 5be1f00a9a701532232f57958efab4be8c959a29
-- 
2.14.3

[PATCH v4 01/12] sha1_file: convert pretend_sha1_file to object_id

[Patryk Obara]

Convert the declaration and definition of pretend_sha1_file to use
struct object_id and adjust all usages of this function.  Rename it to
pretend_object_file.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 Documentation/technical/api-object-access.txt |  2 +-
 blame.c                                       |  2 +-
 cache.h                                       |  5 ++++-
 sha1_file.c                                   | 10 +++++-----
 4 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/Documentation/technical/api-object-access.txt b/Documentation/technical/api-object-access.txt
index 03bb0e950d..a1162e5bcd 100644
--- a/Documentation/technical/api-object-access.txt
+++ b/Documentation/technical/api-object-access.txt
@@ -7,7 +7,7 @@ Talk about <sha1_file.c> and <object.h> family, things like
 * read_object_with_reference()
 * has_sha1_file()
 * write_sha1_file()
-* pretend_sha1_file()
+* pretend_object_file()
 * lookup_{object,commit,tag,blob,tree}
 * parse_{object,commit,tag,blob,tree}
 * Use of object flags
diff --git a/blame.c b/blame.c
index 2893f3c103..1fc22b304b 100644
--- a/blame.c
+++ b/blame.c
@@ -232,7 +232,7 @@ static struct commit *fake_working_tree_commit(struct diff_options *opt,
 	convert_to_git(&the_index, path, buf.buf, buf.len, &buf, 0);
 	origin->file.ptr = buf.buf;
 	origin->file.size = buf.len;
-	pretend_sha1_file(buf.buf, buf.len, OBJ_BLOB, origin->blob_oid.hash);
+	pretend_object_file(buf.buf, buf.len, OBJ_BLOB, &origin->blob_oid);
 
 	/*
 	 * Read the current index, replace the path entry with
diff --git a/cache.h b/cache.h
index d8b975a571..e4e03ac51d 100644
--- a/cache.h
+++ b/cache.h
@@ -1241,7 +1241,10 @@ extern int sha1_object_info(const unsigned char *, unsigned long *);
 extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
 extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
 extern int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type, struct object_id *oid, unsigned flags);
-extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
+
+extern int pretend_object_file(void *, unsigned long, enum object_type,
+			       struct object_id *oid);
+
 extern int force_object_loose(const unsigned char *sha1, time_t mtime);
 extern int git_open_cloexec(const char *name, int flags);
 #define git_open(name) git_open_cloexec(name, O_RDONLY)
diff --git a/sha1_file.c b/sha1_file.c
index 3da70ac650..830b93b428 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1312,13 +1312,13 @@ static void *read_object(const unsigned char *sha1, enum object_type *type,
 	return content;
 }
 
-int pretend_sha1_file(void *buf, unsigned long len, enum object_type type,
-		      unsigned char *sha1)
+int pretend_object_file(void *buf, unsigned long len, enum object_type type,
+			struct object_id *oid)
 {
 	struct cached_object *co;
 
-	hash_sha1_file(buf, len, typename(type), sha1);
-	if (has_sha1_file(sha1) || find_cached_object(sha1))
+	hash_sha1_file(buf, len, typename(type), oid->hash);
+	if (has_sha1_file(oid->hash) || find_cached_object(oid->hash))
 		return 0;
 	ALLOC_GROW(cached_objects, cached_object_nr + 1, cached_object_alloc);
 	co = &cached_objects[cached_object_nr++];
@@ -1326,7 +1326,7 @@ int pretend_sha1_file(void *buf, unsigned long len, enum object_type type,
 	co->type = type;
 	co->buf = xmalloc(len);
 	memcpy(co->buf, buf, len);
-	hashcpy(co->sha1, sha1);
+	hashcpy(co->sha1, oid->hash);
 	return 0;
 }
 
-- 
2.14.3

[PATCH v4 02/12] dir: convert struct sha1_stat to use object_id

[Patryk Obara]

Convert the declaration of struct sha1_stat. Adjust all usages of this
struct and replace hash{clr,cmp,cpy} with oid{clr,cmp,cpy} wherever
possible.  Rename it to struct oid_stat.

Rename static function load_sha1_stat to load_oid_stat.

Remove macro EMPTY_BLOB_SHA1_BIN, as it's no longer used.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 cache.h                              |   2 -
 dir.c                                | 104 +++++++++++++++++------------------
 dir.h                                |  12 ++--
 t/helper/test-dump-untracked-cache.c |   4 +-
 4 files changed, 58 insertions(+), 64 deletions(-)

diff --git a/cache.h b/cache.h
index e4e03ac51d..ed72933ba7 100644
--- a/cache.h
+++ b/cache.h
@@ -1047,8 +1047,6 @@ extern const struct object_id empty_tree_oid;
 	"\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \
 	"\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91"
 extern const struct object_id empty_blob_oid;
-#define EMPTY_BLOB_SHA1_BIN (empty_blob_oid.hash)
-
 
 static inline int is_empty_blob_sha1(const unsigned char *sha1)
 {
diff --git a/dir.c b/dir.c
index 7c4b45e30e..22cadbda9d 100644
--- a/dir.c
+++ b/dir.c
@@ -231,12 +231,10 @@ int within_depth(const char *name, int namelen,
  *     1 along with { data, size } of the (possibly augmented) buffer
  *       when successful.
  *
- * Optionally updates the given sha1_stat with the given OID (when valid).
+ * Optionally updates the given oid_stat with the given OID (when valid).
  */
-static int do_read_blob(const struct object_id *oid,
-			struct sha1_stat *sha1_stat,
-			size_t *size_out,
-			char **data_out)
+static int do_read_blob(const struct object_id *oid, struct oid_stat *oid_stat,
+			size_t *size_out, char **data_out)
 {
 	enum object_type type;
 	unsigned long sz;
@@ -251,9 +249,9 @@ static int do_read_blob(const struct object_id *oid,
 		return -1;
 	}
 
-	if (sha1_stat) {
-		memset(&sha1_stat->stat, 0, sizeof(sha1_stat->stat));
-		hashcpy(sha1_stat->sha1, oid->hash);
+	if (oid_stat) {
+		memset(&oid_stat->stat, 0, sizeof(oid_stat->stat));
+		oidcpy(&oid_stat->oid, oid);
 	}
 
 	if (sz == 0) {
@@ -654,9 +652,8 @@ void add_exclude(const char *string, const char *base,
 
 static int read_skip_worktree_file_from_index(const struct index_state *istate,
 					      const char *path,
-					      size_t *size_out,
-					      char **data_out,
-					      struct sha1_stat *sha1_stat)
+					      size_t *size_out, char **data_out,
+					      struct oid_stat *oid_stat)
 {
 	int pos, len;
 
@@ -667,7 +664,7 @@ static int read_skip_worktree_file_from_index(const struct index_state *istate,
 	if (!ce_skip_worktree(istate->cache[pos]))
 		return -1;
 
-	return do_read_blob(&istate->cache[pos]->oid, sha1_stat, size_out, data_out);
+	return do_read_blob(&istate->cache[pos]->oid, oid_stat, size_out, data_out);
 }
 
 /*
@@ -795,9 +792,8 @@ static int add_excludes_from_buffer(char *buf, size_t size,
  * ss_valid is non-zero, "ss" must contain good value as input.
  */
 static int add_excludes(const char *fname, const char *base, int baselen,
-			struct exclude_list *el,
-			struct index_state *istate,
-			struct sha1_stat *sha1_stat)
+			struct exclude_list *el, struct index_state *istate,
+			struct oid_stat *oid_stat)
 {
 	struct stat st;
 	int r;
@@ -815,16 +811,16 @@ static int add_excludes(const char *fname, const char *base, int baselen,
 			return -1;
 		r = read_skip_worktree_file_from_index(istate, fname,
 						       &size, &buf,
-						       sha1_stat);
+						       oid_stat);
 		if (r != 1)
 			return r;
 	} else {
 		size = xsize_t(st.st_size);
 		if (size == 0) {
-			if (sha1_stat) {
-				fill_stat_data(&sha1_stat->stat, &st);
-				hashcpy(sha1_stat->sha1, EMPTY_BLOB_SHA1_BIN);
-				sha1_stat->valid = 1;
+			if (oid_stat) {
+				fill_stat_data(&oid_stat->stat, &st);
+				oidcpy(&oid_stat->oid, &empty_blob_oid);
+				oid_stat->valid = 1;
 			}
 			close(fd);
 			return 0;
@@ -837,22 +833,23 @@ static int add_excludes(const char *fname, const char *base, int baselen,
 		}
 		buf[size++] = '\n';
 		close(fd);
-		if (sha1_stat) {
+		if (oid_stat) {
 			int pos;
-			if (sha1_stat->valid &&
-			    !match_stat_data_racy(istate, &sha1_stat->stat, &st))
+			if (oid_stat->valid &&
+			    !match_stat_data_racy(istate, &oid_stat->stat, &st))
 				; /* no content change, ss->sha1 still good */
 			else if (istate &&
 				 (pos = index_name_pos(istate, fname, strlen(fname))) >= 0 &&
 				 !ce_stage(istate->cache[pos]) &&
 				 ce_uptodate(istate->cache[pos]) &&
 				 !would_convert_to_git(istate, fname))
-				hashcpy(sha1_stat->sha1,
-					istate->cache[pos]->oid.hash);
+				oidcpy(&oid_stat->oid,
+				       &istate->cache[pos]->oid);
 			else
-				hash_sha1_file(buf, size, "blob", sha1_stat->sha1);
-			fill_stat_data(&sha1_stat->stat, &st);
-			sha1_stat->valid = 1;
+				hash_sha1_file(buf, size, "blob",
+					       oid_stat->oid.hash);
+			fill_stat_data(&oid_stat->stat, &st);
+			oid_stat->valid = 1;
 		}
 	}
 
@@ -930,7 +927,7 @@ struct exclude_list *add_exclude_list(struct dir_struct *dir,
  * Used to set up core.excludesfile and .git/info/exclude lists.
  */
 static void add_excludes_from_file_1(struct dir_struct *dir, const char *fname,
-				     struct sha1_stat *sha1_stat)
+				     struct oid_stat *oid_stat)
 {
 	struct exclude_list *el;
 	/*
@@ -941,7 +938,7 @@ static void add_excludes_from_file_1(struct dir_struct *dir, const char *fname,
 	if (!dir->untracked)
 		dir->unmanaged_exclude_files++;
 	el = add_exclude_list(dir, EXC_FILE, fname);
-	if (add_excludes(fname, "", 0, el, NULL, sha1_stat) < 0)
+	if (add_excludes(fname, "", 0, el, NULL, oid_stat) < 0)
 		die("cannot use %s as an exclude file", fname);
 }
 
@@ -1180,7 +1177,7 @@ static void prep_exclude(struct dir_struct *dir,
 
 	while (current < baselen) {
 		const char *cp;
-		struct sha1_stat sha1_stat;
+		struct oid_stat oid_stat;
 
 		stk = xcalloc(1, sizeof(*stk));
 		if (current < 0) {
@@ -1223,8 +1220,8 @@ static void prep_exclude(struct dir_struct *dir,
 		}
 
 		/* Try to read per-directory file */
-		hashclr(sha1_stat.sha1);
-		sha1_stat.valid = 0;
+		oidclr(&oid_stat.oid);
+		oid_stat.valid = 0;
 		if (dir->exclude_per_dir &&
 		    /*
 		     * If we know that no files have been added in
@@ -1252,7 +1249,7 @@ static void prep_exclude(struct dir_struct *dir,
 			strbuf_addstr(&sb, dir->exclude_per_dir);
 			el->src = strbuf_detach(&sb, NULL);
 			add_excludes(el->src, el->src, stk->baselen, el, istate,
-				     untracked ? &sha1_stat : NULL);
+				     untracked ? &oid_stat : NULL);
 		}
 		/*
 		 * NEEDSWORK: when untracked cache is enabled, prep_exclude()
@@ -1269,9 +1266,9 @@ static void prep_exclude(struct dir_struct *dir,
 		 * order, though, if you do that.
 		 */
 		if (untracked &&
-		    hashcmp(sha1_stat.sha1, untracked->exclude_sha1)) {
+		    hashcmp(oid_stat.oid.hash, untracked->exclude_sha1)) {
 			invalidate_gitignore(dir->untracked, untracked);
-			hashcpy(untracked->exclude_sha1, sha1_stat.sha1);
+			hashcpy(untracked->exclude_sha1, oid_stat.oid.hash);
 		}
 		dir->exclude_stack = stk;
 		current = stk->baselen;
@@ -2228,13 +2225,13 @@ static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *d
 
 	/* Validate $GIT_DIR/info/exclude and core.excludesfile */
 	root = dir->untracked->root;
-	if (hashcmp(dir->ss_info_exclude.sha1,
-		    dir->untracked->ss_info_exclude.sha1)) {
+	if (oidcmp(&dir->ss_info_exclude.oid,
+		   &dir->untracked->ss_info_exclude.oid)) {
 		invalidate_gitignore(dir->untracked, root);
 		dir->untracked->ss_info_exclude = dir->ss_info_exclude;
 	}
-	if (hashcmp(dir->ss_excludes_file.sha1,
-		    dir->untracked->ss_excludes_file.sha1)) {
+	if (oidcmp(&dir->ss_excludes_file.oid,
+		   &dir->untracked->ss_excludes_file.oid)) {
 		invalidate_gitignore(dir->untracked, root);
 		dir->untracked->ss_excludes_file = dir->ss_excludes_file;
 	}
@@ -2638,8 +2635,8 @@ void write_untracked_extension(struct strbuf *out, struct untracked_cache *untra
 	FLEX_ALLOC_MEM(ouc, exclude_per_dir, untracked->exclude_per_dir, len);
 	stat_data_to_disk(&ouc->info_exclude_stat, &untracked->ss_info_exclude.stat);
 	stat_data_to_disk(&ouc->excludes_file_stat, &untracked->ss_excludes_file.stat);
-	hashcpy(ouc->info_exclude_sha1, untracked->ss_info_exclude.sha1);
-	hashcpy(ouc->excludes_file_sha1, untracked->ss_excludes_file.sha1);
+	hashcpy(ouc->info_exclude_sha1, untracked->ss_info_exclude.oid.hash);
+	hashcpy(ouc->excludes_file_sha1, untracked->ss_excludes_file.oid.hash);
 	ouc->dir_flags = htonl(untracked->dir_flags);
 
 	varint_len = encode_varint(untracked->ident.len, varbuf);
@@ -2816,13 +2813,12 @@ static void read_sha1(size_t pos, void *cb)
 	rd->data += 20;
 }
 
-static void load_sha1_stat(struct sha1_stat *sha1_stat,
-			   const unsigned char *data,
-			   const unsigned char *sha1)
+static void load_oid_stat(struct oid_stat *oid_stat, const unsigned char *data,
+			  const unsigned char *sha1)
 {
-	stat_data_from_disk(&sha1_stat->stat, data);
-	hashcpy(sha1_stat->sha1, sha1);
-	sha1_stat->valid = 1;
+	stat_data_from_disk(&oid_stat->stat, data);
+	hashcpy(oid_stat->oid.hash, sha1);
+	oid_stat->valid = 1;
 }
 
 struct untracked_cache *read_untracked_extension(const void *data, unsigned long sz)
@@ -2850,12 +2846,12 @@ struct untracked_cache *read_untracked_extension(const void *data, unsigned long
 	uc = xcalloc(1, sizeof(*uc));
 	strbuf_init(&uc->ident, ident_len);
 	strbuf_add(&uc->ident, ident, ident_len);
-	load_sha1_stat(&uc->ss_info_exclude,
-		       next + ouc_offset(info_exclude_stat),
-		       next + ouc_offset(info_exclude_sha1));
-	load_sha1_stat(&uc->ss_excludes_file,
-		       next + ouc_offset(excludes_file_stat),
-		       next + ouc_offset(excludes_file_sha1));
+	load_oid_stat(&uc->ss_info_exclude,
+		      next + ouc_offset(info_exclude_stat),
+		      next + ouc_offset(info_exclude_sha1));
+	load_oid_stat(&uc->ss_excludes_file,
+		      next + ouc_offset(excludes_file_stat),
+		      next + ouc_offset(excludes_file_sha1));
 	uc->dir_flags = get_be32(next + ouc_offset(dir_flags));
 	exclude_per_dir = (const char *)next + ouc_offset(exclude_per_dir);
 	uc->exclude_per_dir = xstrdup(exclude_per_dir);
diff --git a/dir.h b/dir.h
index 11a047ba48..e7bb786a33 100644
--- a/dir.h
+++ b/dir.h
@@ -74,9 +74,9 @@ struct exclude_list_group {
 	struct exclude_list *el;
 };
 
-struct sha1_stat {
+struct oid_stat {
 	struct stat_data stat;
-	unsigned char sha1[20];
+	struct object_id oid;
 	int valid;
 };
 
@@ -124,8 +124,8 @@ struct untracked_cache_dir {
 };
 
 struct untracked_cache {
-	struct sha1_stat ss_info_exclude;
-	struct sha1_stat ss_excludes_file;
+	struct oid_stat ss_info_exclude;
+	struct oid_stat ss_excludes_file;
 	const char *exclude_per_dir;
 	struct strbuf ident;
 	/*
@@ -195,8 +195,8 @@ struct dir_struct {
 
 	/* Enable untracked file cache if set */
 	struct untracked_cache *untracked;
-	struct sha1_stat ss_info_exclude;
-	struct sha1_stat ss_excludes_file;
+	struct oid_stat ss_info_exclude;
+	struct oid_stat ss_excludes_file;
 	unsigned unmanaged_exclude_files;
 };
 
diff --git a/t/helper/test-dump-untracked-cache.c b/t/helper/test-dump-untracked-cache.c
index f752532ffb..d7c55c2355 100644
--- a/t/helper/test-dump-untracked-cache.c
+++ b/t/helper/test-dump-untracked-cache.c
@@ -54,8 +54,8 @@ int cmd_main(int ac, const char **av)
 		printf("no untracked cache\n");
 		return 0;
 	}
-	printf("info/exclude %s\n", sha1_to_hex(uc->ss_info_exclude.sha1));
-	printf("core.excludesfile %s\n", sha1_to_hex(uc->ss_excludes_file.sha1));
+	printf("info/exclude %s\n", oid_to_hex(&uc->ss_info_exclude.oid));
+	printf("core.excludesfile %s\n", oid_to_hex(&uc->ss_excludes_file.oid));
 	printf("exclude_per_dir %s\n", uc->exclude_per_dir);
 	printf("flags %08x\n", uc->dir_flags);
 	if (uc->root)
-- 
2.14.3

[PATCH v4 03/12] sha1_file: convert hash_sha1_file to object_id

[Patryk Obara]

Convert the declaration and definition of hash_sha1_file to use
struct object_id and adjust all function calls.

Rename this function to hash_object_file.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 apply.c                  |  4 ++--
 builtin/index-pack.c     |  5 ++---
 builtin/replace.c        |  2 +-
 builtin/unpack-objects.c |  2 +-
 cache-tree.c             | 11 +++++------
 cache.h                  |  5 ++++-
 convert.c                |  6 +++---
 diffcore-rename.c        |  4 ++--
 dir.c                    |  4 ++--
 log-tree.c               |  2 +-
 sha1_file.c              | 26 +++++++++++++-------------
 11 files changed, 36 insertions(+), 35 deletions(-)

diff --git a/apply.c b/apply.c
index 321a9fa68d..57ab8a8a29 100644
--- a/apply.c
+++ b/apply.c
@@ -3154,7 +3154,7 @@ static int apply_binary(struct apply_state *state,
 		 * See if the old one matches what the patch
 		 * applies to.
 		 */
-		hash_sha1_file(img->buf, img->len, blob_type, oid.hash);
+		hash_object_file(img->buf, img->len, blob_type, &oid);
 		if (strcmp(oid_to_hex(&oid), patch->old_sha1_prefix))
 			return error(_("the patch applies to '%s' (%s), "
 				       "which does not match the "
@@ -3199,7 +3199,7 @@ static int apply_binary(struct apply_state *state,
 				     name);
 
 		/* verify that the result matches */
-		hash_sha1_file(img->buf, img->len, blob_type, oid.hash);
+		hash_object_file(img->buf, img->len, blob_type, &oid);
 		if (strcmp(oid_to_hex(&oid), patch->new_sha1_prefix))
 			return error(_("binary patch to '%s' creates incorrect result (expecting %s, got %s)"),
 				name, patch->new_sha1_prefix, oid_to_hex(&oid));
diff --git a/builtin/index-pack.c b/builtin/index-pack.c
index 4c51aec81f..7f5a95e6ff 100644
--- a/builtin/index-pack.c
+++ b/builtin/index-pack.c
@@ -958,9 +958,8 @@ static void resolve_delta(struct object_entry *delta_obj,
 	free(delta_data);
 	if (!result->data)
 		bad_object(delta_obj->idx.offset, _("failed to apply delta"));
-	hash_sha1_file(result->data, result->size,
-		       typename(delta_obj->real_type),
-		       delta_obj->idx.oid.hash);
+	hash_object_file(result->data, result->size,
+			 typename(delta_obj->real_type), &delta_obj->idx.oid);
 	sha1_object(result->data, NULL, result->size, delta_obj->real_type,
 		    &delta_obj->idx.oid);
 	counter_lock();
diff --git a/builtin/replace.c b/builtin/replace.c
index 10078ae371..814bf6bfde 100644
--- a/builtin/replace.c
+++ b/builtin/replace.c
@@ -355,7 +355,7 @@ static void check_one_mergetag(struct commit *commit,
 	struct tag *tag;
 	int i;
 
-	hash_sha1_file(extra->value, extra->len, typename(OBJ_TAG), tag_oid.hash);
+	hash_object_file(extra->value, extra->len, typename(OBJ_TAG), &tag_oid);
 	tag = lookup_tag(&tag_oid);
 	if (!tag)
 		die(_("bad mergetag in commit '%s'"), ref);
diff --git a/builtin/unpack-objects.c b/builtin/unpack-objects.c
index 62ea264c46..85a40d1af7 100644
--- a/builtin/unpack-objects.c
+++ b/builtin/unpack-objects.c
@@ -258,7 +258,7 @@ static void write_object(unsigned nr, enum object_type type,
 	} else {
 		struct object *obj;
 		int eaten;
-		hash_sha1_file(buf, size, typename(type), obj_list[nr].oid.hash);
+		hash_object_file(buf, size, typename(type), &obj_list[nr].oid);
 		added_object(nr, type, buf, size);
 		obj = parse_object_buffer(&obj_list[nr].oid, type, size, buf,
 					  &eaten);
diff --git a/cache-tree.c b/cache-tree.c
index e03e72c34a..6574eeb80d 100644
--- a/cache-tree.c
+++ b/cache-tree.c
@@ -400,15 +400,14 @@ static int update_one(struct cache_tree *it,
 	}
 
 	if (repair) {
-		unsigned char sha1[20];
-		hash_sha1_file(buffer.buf, buffer.len, tree_type, sha1);
-		if (has_sha1_file(sha1))
-			hashcpy(it->oid.hash, sha1);
+		struct object_id oid;
+		hash_object_file(buffer.buf, buffer.len, tree_type, &oid);
+		if (has_sha1_file(oid.hash))
+			oidcpy(&it->oid, &oid);
 		else
 			to_invalidate = 1;
 	} else if (dryrun)
-		hash_sha1_file(buffer.buf, buffer.len, tree_type,
-			       it->oid.hash);
+		hash_object_file(buffer.buf, buffer.len, tree_type, &it->oid);
 	else if (write_sha1_file(buffer.buf, buffer.len, tree_type, it->oid.hash)) {
 		strbuf_release(&buffer);
 		return -1;
diff --git a/cache.h b/cache.h
index ed72933ba7..08f2b81e1b 100644
--- a/cache.h
+++ b/cache.h
@@ -1236,7 +1236,10 @@ static inline const unsigned char *lookup_replace_object(const unsigned char *sh
 
 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
 extern int sha1_object_info(const unsigned char *, unsigned long *);
-extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
+
+extern int hash_object_file(const void *buf, unsigned long len,
+			    const char *type, struct object_id *oid);
+
 extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
 extern int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type, struct object_id *oid, unsigned flags);
 
diff --git a/convert.c b/convert.c
index 1a41a48e15..5e46708c73 100644
--- a/convert.c
+++ b/convert.c
@@ -898,7 +898,7 @@ static int ident_to_git(const char *path, const char *src, size_t len,
 static int ident_to_worktree(const char *path, const char *src, size_t len,
                              struct strbuf *buf, int ident)
 {
-	unsigned char sha1[20];
+	struct object_id oid;
 	char *to_free = NULL, *dollar, *spc;
 	int cnt;
 
@@ -912,7 +912,7 @@ static int ident_to_worktree(const char *path, const char *src, size_t len,
 	/* are we "faking" in place editing ? */
 	if (src == buf->buf)
 		to_free = strbuf_detach(buf, NULL);
-	hash_sha1_file(src, len, "blob", sha1);
+	hash_object_file(src, len, "blob", &oid);
 
 	strbuf_grow(buf, len + cnt * 43);
 	for (;;) {
@@ -969,7 +969,7 @@ static int ident_to_worktree(const char *path, const char *src, size_t len,
 
 		/* step 4: substitute */
 		strbuf_addstr(buf, "Id: ");
-		strbuf_add(buf, sha1_to_hex(sha1), 40);
+		strbuf_addstr(buf, oid_to_hex(&oid));
 		strbuf_addstr(buf, " $");
 	}
 	strbuf_add(buf, src, len);
diff --git a/diffcore-rename.c b/diffcore-rename.c
index 245e999fe5..e27d0bb632 100644
--- a/diffcore-rename.c
+++ b/diffcore-rename.c
@@ -260,8 +260,8 @@ static unsigned int hash_filespec(struct diff_filespec *filespec)
 	if (!filespec->oid_valid) {
 		if (diff_populate_filespec(filespec, 0))
 			return 0;
-		hash_sha1_file(filespec->data, filespec->size, "blob",
-			       filespec->oid.hash);
+		hash_object_file(filespec->data, filespec->size, "blob",
+				 &filespec->oid);
 	}
 	return sha1hash(filespec->oid.hash);
 }
diff --git a/dir.c b/dir.c
index 22cadbda9d..fe0f25463f 100644
--- a/dir.c
+++ b/dir.c
@@ -846,8 +846,8 @@ static int add_excludes(const char *fname, const char *base, int baselen,
 				oidcpy(&oid_stat->oid,
 				       &istate->cache[pos]->oid);
 			else
-				hash_sha1_file(buf, size, "blob",
-					       oid_stat->oid.hash);
+				hash_object_file(buf, size, "blob",
+						 &oid_stat->oid);
 			fill_stat_data(&oid_stat->stat, &st);
 			oid_stat->valid = 1;
 		}
diff --git a/log-tree.c b/log-tree.c
index fca29d4799..fc0cc0d6d1 100644
--- a/log-tree.c
+++ b/log-tree.c
@@ -499,7 +499,7 @@ static void show_one_mergetag(struct commit *commit,
 	int status, nth;
 	size_t payload_size, gpg_message_offset;
 
-	hash_sha1_file(extra->value, extra->len, typename(OBJ_TAG), oid.hash);
+	hash_object_file(extra->value, extra->len, typename(OBJ_TAG), &oid);
 	tag = lookup_tag(&oid);
 	if (!tag)
 		return; /* error message already given */
diff --git a/sha1_file.c b/sha1_file.c
index 830b93b428..4c44c60cec 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -788,7 +788,7 @@ void *xmmap(void *start, size_t length,
 int check_sha1_signature(const unsigned char *sha1, void *map,
 			 unsigned long size, const char *type)
 {
-	unsigned char real_sha1[20];
+	struct object_id real_oid;
 	enum object_type obj_type;
 	struct git_istream *st;
 	git_SHA_CTX c;
@@ -796,8 +796,8 @@ int check_sha1_signature(const unsigned char *sha1, void *map,
 	int hdrlen;
 
 	if (map) {
-		hash_sha1_file(map, size, type, real_sha1);
-		return hashcmp(sha1, real_sha1) ? -1 : 0;
+		hash_object_file(map, size, type, &real_oid);
+		return hashcmp(sha1, real_oid.hash) ? -1 : 0;
 	}
 
 	st = open_istream(sha1, &obj_type, &size, NULL);
@@ -822,9 +822,9 @@ int check_sha1_signature(const unsigned char *sha1, void *map,
 			break;
 		git_SHA1_Update(&c, buf, readlen);
 	}
-	git_SHA1_Final(real_sha1, &c);
+	git_SHA1_Final(real_oid.hash, &c);
 	close_istream(st);
-	return hashcmp(sha1, real_sha1) ? -1 : 0;
+	return hashcmp(sha1, real_oid.hash) ? -1 : 0;
 }
 
 int git_open_cloexec(const char *name, int flags)
@@ -1317,7 +1317,7 @@ int pretend_object_file(void *buf, unsigned long len, enum object_type type,
 {
 	struct cached_object *co;
 
-	hash_sha1_file(buf, len, typename(type), oid->hash);
+	hash_object_file(buf, len, typename(type), oid);
 	if (has_sha1_file(oid->hash) || find_cached_object(oid->hash))
 		return 0;
 	ALLOC_GROW(cached_objects, cached_object_nr + 1, cached_object_alloc);
@@ -1485,12 +1485,12 @@ static int write_buffer(int fd, const void *buf, size_t len)
 	return 0;
 }
 
-int hash_sha1_file(const void *buf, unsigned long len, const char *type,
-                   unsigned char *sha1)
+int hash_object_file(const void *buf, unsigned long len, const char *type,
+		     struct object_id *oid)
 {
 	char hdr[32];
 	int hdrlen = sizeof(hdr);
-	write_sha1_file_prepare(buf, len, type, sha1, hdr, &hdrlen);
+	write_sha1_file_prepare(buf, len, type, oid->hash, hdr, &hdrlen);
 	return 0;
 }
 
@@ -1769,7 +1769,7 @@ static int index_mem(struct object_id *oid, void *buf, size_t size,
 	if (write_object)
 		ret = write_sha1_file(buf, size, typename(type), oid->hash);
 	else
-		ret = hash_sha1_file(buf, size, typename(type), oid->hash);
+		ret = hash_object_file(buf, size, typename(type), oid);
 	if (re_allocated)
 		free(buf);
 	return ret;
@@ -1792,8 +1792,8 @@ static int index_stream_convert_blob(struct object_id *oid, int fd,
 		ret = write_sha1_file(sbuf.buf, sbuf.len, typename(OBJ_BLOB),
 				      oid->hash);
 	else
-		ret = hash_sha1_file(sbuf.buf, sbuf.len, typename(OBJ_BLOB),
-				     oid->hash);
+		ret = hash_object_file(sbuf.buf, sbuf.len, typename(OBJ_BLOB),
+				       oid);
 	strbuf_release(&sbuf);
 	return ret;
 }
@@ -1907,7 +1907,7 @@ int index_path(struct object_id *oid, const char *path, struct stat *st, unsigne
 		if (strbuf_readlink(&sb, path, st->st_size))
 			return error_errno("readlink(\"%s\")", path);
 		if (!(flags & HASH_WRITE_OBJECT))
-			hash_sha1_file(sb.buf, sb.len, blob_type, oid->hash);
+			hash_object_file(sb.buf, sb.len, blob_type, oid);
 		else if (write_sha1_file(sb.buf, sb.len, blob_type, oid->hash))
 			rc = error("%s: failed to insert into database", path);
 		strbuf_release(&sb);
-- 
2.14.3

[PATCH v4 04/12] cache: clear whole hash buffer with oidclr

[Patryk Obara]

As long as GIT_SHA1_RAWSZ is equal to GIT_MAX_RAWSZ there's no problem,
but when new hashing algorithm will be in place this memset will clear
only 20-byte prefix of hash buffer.

Alternatively, hashclr implementation could be adjusted, but this
function is almost removed from codebase already.  Separate
implementation of oidclr prevents potential buffer overrun in case
someone incorrectly used hashclr on object_id in future.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 cache.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cache.h b/cache.h
index 08f2b81e1b..d5d78d6a51 100644
--- a/cache.h
+++ b/cache.h
@@ -1029,7 +1029,7 @@ static inline void hashclr(unsigned char *hash)
 
 static inline void oidclr(struct object_id *oid)
 {
-	hashclr(oid->hash);
+	memset(oid->hash, 0, GIT_MAX_RAWSZ);
 }
 
 
-- 
2.14.3

[PATCH v4 05/12] match-trees: convert splice_tree to object_id

[Patryk Obara]

Convert the definition of static recursive splice_tree function to use
struct object_id and adjust single caller.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 match-trees.c | 46 ++++++++++++++++++++++------------------------
 1 file changed, 22 insertions(+), 24 deletions(-)

diff --git a/match-trees.c b/match-trees.c
index 396b7338df..afb771c4f5 100644
--- a/match-trees.c
+++ b/match-trees.c
@@ -158,22 +158,20 @@ static void match_trees(const struct object_id *hash1,
 }
 
 /*
- * A tree "hash1" has a subdirectory at "prefix".  Come up with a
- * tree object by replacing it with another tree "hash2".
+ * A tree "oid1" has a subdirectory at "prefix".  Come up with a tree object by
+ * replacing it with another tree "oid2".
  */
-static int splice_tree(const unsigned char *hash1,
-		       const char *prefix,
-		       const unsigned char *hash2,
-		       unsigned char *result)
+static int splice_tree(const struct object_id *oid1, const char *prefix,
+		       const struct object_id *oid2, struct object_id *result)
 {
 	char *subpath;
 	int toplen;
 	char *buf;
 	unsigned long sz;
 	struct tree_desc desc;
-	unsigned char *rewrite_here;
-	const unsigned char *rewrite_with;
-	unsigned char subtree[20];
+	struct object_id *rewrite_here;
+	const struct object_id *rewrite_with;
+	struct object_id subtree;
 	enum object_type type;
 	int status;
 
@@ -182,9 +180,9 @@ static int splice_tree(const unsigned char *hash1,
 	if (*subpath)
 		subpath++;
 
-	buf = read_sha1_file(hash1, &type, &sz);
+	buf = read_sha1_file(oid1->hash, &type, &sz);
 	if (!buf)
-		die("cannot read tree %s", sha1_to_hex(hash1));
+		die("cannot read tree %s", oid_to_hex(oid1));
 	init_tree_desc(&desc, buf, sz);
 
 	rewrite_here = NULL;
@@ -197,26 +195,26 @@ static int splice_tree(const unsigned char *hash1,
 		if (strlen(name) == toplen &&
 		    !memcmp(name, prefix, toplen)) {
 			if (!S_ISDIR(mode))
-				die("entry %s in tree %s is not a tree",
-				    name, sha1_to_hex(hash1));
-			rewrite_here = (unsigned char *) oid->hash;
+				die("entry %s in tree %s is not a tree", name,
+				    oid_to_hex(oid1));
+			rewrite_here = (struct object_id *)oid;
 			break;
 		}
 		update_tree_entry(&desc);
 	}
 	if (!rewrite_here)
-		die("entry %.*s not found in tree %s",
-		    toplen, prefix, sha1_to_hex(hash1));
+		die("entry %.*s not found in tree %s", toplen, prefix,
+		    oid_to_hex(oid1));
 	if (*subpath) {
-		status = splice_tree(rewrite_here, subpath, hash2, subtree);
+		status = splice_tree(rewrite_here, subpath, oid2, &subtree);
 		if (status)
 			return status;
-		rewrite_with = subtree;
+		rewrite_with = &subtree;
+	} else {
+		rewrite_with = oid2;
 	}
-	else
-		rewrite_with = hash2;
-	hashcpy(rewrite_here, rewrite_with);
-	status = write_sha1_file(buf, sz, tree_type, result);
+	oidcpy(rewrite_here, rewrite_with);
+	status = write_sha1_file(buf, sz, tree_type, result->hash);
 	free(buf);
 	return status;
 }
@@ -280,7 +278,7 @@ void shift_tree(const struct object_id *hash1,
 	if (!*add_prefix)
 		return;
 
-	splice_tree(hash1->hash, add_prefix, hash2->hash, shifted->hash);
+	splice_tree(hash1, add_prefix, hash2, shifted);
 }
 
 /*
@@ -334,7 +332,7 @@ void shift_tree_by(const struct object_id *hash1,
 		 * shift tree2 down by adding shift_prefix above it
 		 * to match tree1.
 		 */
-		splice_tree(hash1->hash, shift_prefix, hash2->hash, shifted->hash);
+		splice_tree(hash1, shift_prefix, hash2, shifted);
 	else
 		/*
 		 * shift tree2 up by removing shift_prefix from it
-- 
2.14.3

[PATCH v4 06/12] commit: convert commit_tree* to object_id

[Patryk Obara]

Convert the definitions and declarations of commit_tree and
commit_tree_extended to use struct object_id and adjust all usages of
these functions.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 builtin/am.c          |  4 ++--
 builtin/commit-tree.c |  4 ++--
 builtin/commit.c      |  5 +++--
 builtin/merge.c       |  8 ++++----
 commit.c              | 15 +++++++--------
 commit.h              | 11 ++++++-----
 notes-cache.c         |  4 ++--
 notes-merge.c         |  9 ++++-----
 notes-utils.c         |  7 ++++---
 notes-utils.h         |  3 ++-
 10 files changed, 36 insertions(+), 34 deletions(-)

diff --git a/builtin/am.c b/builtin/am.c
index acfe9d3c8c..6e6abb05cd 100644
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -1641,8 +1641,8 @@ static void do_commit(const struct am_state *state)
 		setenv("GIT_COMMITTER_DATE",
 			state->ignore_date ? "" : state->author_date, 1);
 
-	if (commit_tree(state->msg, state->msg_len, tree.hash, parents, commit.hash,
-				author, state->sign_commit))
+	if (commit_tree(state->msg, state->msg_len, &tree, parents, &commit,
+			author, state->sign_commit))
 		die(_("failed to write commit object"));
 
 	reflog_msg = getenv("GIT_REFLOG_ACTION");
diff --git a/builtin/commit-tree.c b/builtin/commit-tree.c
index 2177251e24..e5bdf57b1e 100644
--- a/builtin/commit-tree.c
+++ b/builtin/commit-tree.c
@@ -117,8 +117,8 @@ int cmd_commit_tree(int argc, const char **argv, const char *prefix)
 			die_errno("git commit-tree: failed to read");
 	}
 
-	if (commit_tree(buffer.buf, buffer.len, tree_oid.hash, parents,
-			commit_oid.hash, NULL, sign_commit)) {
+	if (commit_tree(buffer.buf, buffer.len, &tree_oid, parents, &commit_oid,
+			NULL, sign_commit)) {
 		strbuf_release(&buffer);
 		return 1;
 	}
diff --git a/builtin/commit.c b/builtin/commit.c
index 4610e3d8e3..e5974a5999 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -1794,8 +1794,9 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
 		append_merge_tag_headers(parents, &tail);
 	}
 
-	if (commit_tree_extended(sb.buf, sb.len, active_cache_tree->oid.hash,
-			 parents, oid.hash, author_ident.buf, sign_commit, extra)) {
+	if (commit_tree_extended(sb.buf, sb.len, &active_cache_tree->oid,
+				 parents, &oid, author_ident.buf, sign_commit,
+				 extra)) {
 		rollback_index_files();
 		die(_("failed to write commit object"));
 	}
diff --git a/builtin/merge.c b/builtin/merge.c
index 30264cfd7c..92ba99a1a5 100644
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -820,8 +820,8 @@ static int merge_trivial(struct commit *head, struct commit_list *remoteheads)
 	pptr = commit_list_append(head, pptr);
 	pptr = commit_list_append(remoteheads->item, pptr);
 	prepare_to_commit(remoteheads);
-	if (commit_tree(merge_msg.buf, merge_msg.len, result_tree.hash, parents,
-			result_commit.hash, NULL, sign_commit))
+	if (commit_tree(merge_msg.buf, merge_msg.len, &result_tree, parents,
+			&result_commit, NULL, sign_commit))
 		die(_("failed to write commit object"));
 	finish(head, remoteheads, &result_commit, "In-index merge");
 	drop_save();
@@ -845,8 +845,8 @@ static int finish_automerge(struct commit *head,
 		commit_list_insert(head, &parents);
 	strbuf_addch(&merge_msg, '\n');
 	prepare_to_commit(remoteheads);
-	if (commit_tree(merge_msg.buf, merge_msg.len, result_tree->hash, parents,
-			result_commit.hash, NULL, sign_commit))
+	if (commit_tree(merge_msg.buf, merge_msg.len, result_tree, parents,
+			&result_commit, NULL, sign_commit))
 		die(_("failed to write commit object"));
 	strbuf_addf(&buf, "Merge made by the '%s' strategy.", wt_strategy);
 	finish(head, remoteheads, &result_commit, buf.buf);
diff --git a/commit.c b/commit.c
index ff51c9f34a..643f3daec3 100644
--- a/commit.c
+++ b/commit.c
@@ -1380,9 +1380,8 @@ void free_commit_extra_headers(struct commit_extra_header *extra)
 	}
 }
 
-int commit_tree(const char *msg, size_t msg_len,
-		const unsigned char *tree,
-		struct commit_list *parents, unsigned char *ret,
+int commit_tree(const char *msg, size_t msg_len, const struct object_id *tree,
+		struct commit_list *parents, struct object_id *ret,
 		const char *author, const char *sign_commit)
 {
 	struct commit_extra_header *extra = NULL, **tail = &extra;
@@ -1511,8 +1510,8 @@ N_("Warning: commit message did not conform to UTF-8.\n"
    "variable i18n.commitencoding to the encoding your project uses.\n");
 
 int commit_tree_extended(const char *msg, size_t msg_len,
-			 const unsigned char *tree,
-			 struct commit_list *parents, unsigned char *ret,
+			 const struct object_id *tree,
+			 struct commit_list *parents, struct object_id *ret,
 			 const char *author, const char *sign_commit,
 			 struct commit_extra_header *extra)
 {
@@ -1520,7 +1519,7 @@ int commit_tree_extended(const char *msg, size_t msg_len,
 	int encoding_is_utf8;
 	struct strbuf buffer;
 
-	assert_sha1_type(tree, OBJ_TREE);
+	assert_sha1_type(tree->hash, OBJ_TREE);
 
 	if (memchr(msg, '\0', msg_len))
 		return error("a NUL byte in commit log message not allowed.");
@@ -1529,7 +1528,7 @@ int commit_tree_extended(const char *msg, size_t msg_len,
 	encoding_is_utf8 = is_encoding_utf8(git_commit_encoding);
 
 	strbuf_init(&buffer, 8192); /* should avoid reallocs for the headers */
-	strbuf_addf(&buffer, "tree %s\n", sha1_to_hex(tree));
+	strbuf_addf(&buffer, "tree %s\n", oid_to_hex(tree));
 
 	/*
 	 * NOTE! This ordering means that the same exact tree merged with a
@@ -1568,7 +1567,7 @@ int commit_tree_extended(const char *msg, size_t msg_len,
 		goto out;
 	}
 
-	result = write_sha1_file(buffer.buf, buffer.len, commit_type, ret);
+	result = write_sha1_file(buffer.buf, buffer.len, commit_type, ret->hash);
 out:
 	strbuf_release(&buffer);
 	return result;
diff --git a/commit.h b/commit.h
index 425f402775..0fb8271665 100644
--- a/commit.h
+++ b/commit.h
@@ -262,14 +262,15 @@ extern void append_merge_tag_headers(struct commit_list *parents,
 				     struct commit_extra_header ***tail);
 
 extern int commit_tree(const char *msg, size_t msg_len,
-		       const unsigned char *tree,
-		       struct commit_list *parents, unsigned char *ret,
+		       const struct object_id *tree,
+		       struct commit_list *parents, struct object_id *ret,
 		       const char *author, const char *sign_commit);
 
 extern int commit_tree_extended(const char *msg, size_t msg_len,
-				const unsigned char *tree,
-				struct commit_list *parents, unsigned char *ret,
-				const char *author, const char *sign_commit,
+				const struct object_id *tree,
+				struct commit_list *parents,
+				struct object_id *ret, const char *author,
+				const char *sign_commit,
 				struct commit_extra_header *);
 
 extern struct commit_extra_header *read_commit_extra_headers(struct commit *, const char **);
diff --git a/notes-cache.c b/notes-cache.c
index 17ee8602b3..d2f87147cc 100644
--- a/notes-cache.c
+++ b/notes-cache.c
@@ -56,8 +56,8 @@ int notes_cache_write(struct notes_cache *c)
 
 	if (write_notes_tree(&c->tree, tree_oid.hash))
 		return -1;
-	if (commit_tree(c->validity, strlen(c->validity), tree_oid.hash, NULL,
-			commit_oid.hash, NULL, NULL) < 0)
+	if (commit_tree(c->validity, strlen(c->validity), &tree_oid, NULL,
+			&commit_oid, NULL, NULL) < 0)
 		return -1;
 	if (update_ref("update notes cache", c->tree.update_ref, &commit_oid,
 		       NULL, 0, UPDATE_REFS_QUIET_ON_ERR) < 0)
diff --git a/notes-merge.c b/notes-merge.c
index 0f6573cb17..c09c5e0e47 100644
--- a/notes-merge.c
+++ b/notes-merge.c
@@ -642,9 +642,8 @@ int notes_merge(struct notes_merge_options *o,
 		struct commit_list *parents = NULL;
 		commit_list_insert(remote, &parents); /* LIFO order */
 		commit_list_insert(local, &parents);
-		create_notes_commit(local_tree, parents,
-				    o->commit_msg.buf, o->commit_msg.len,
-				    result_oid->hash);
+		create_notes_commit(local_tree, parents, o->commit_msg.buf,
+				    o->commit_msg.len, result_oid);
 	}
 
 found_result:
@@ -718,8 +717,8 @@ int notes_merge_commit(struct notes_merge_options *o,
 		strbuf_setlen(&path, baselen);
 	}
 
-	create_notes_commit(partial_tree, partial_commit->parents,
-			    msg, strlen(msg), result_oid->hash);
+	create_notes_commit(partial_tree, partial_commit->parents, msg,
+			    strlen(msg), result_oid);
 	unuse_commit_buffer(partial_commit, buffer);
 	if (o->verbosity >= 4)
 		printf("Finalized notes merge commit: %s\n",
diff --git a/notes-utils.c b/notes-utils.c
index 5c8e70c98f..058c642dac 100644
--- a/notes-utils.c
+++ b/notes-utils.c
@@ -6,7 +6,7 @@
 
 void create_notes_commit(struct notes_tree *t, struct commit_list *parents,
 			 const char *msg, size_t msg_len,
-			 unsigned char *result_sha1)
+			 struct object_id *result_oid)
 {
 	struct object_id tree_oid;
 
@@ -27,7 +27,8 @@ void create_notes_commit(struct notes_tree *t, struct commit_list *parents,
 		/* else: t->ref points to nothing, assume root/orphan commit */
 	}
 
-	if (commit_tree(msg, msg_len, tree_oid.hash, parents, result_sha1, NULL, NULL))
+	if (commit_tree(msg, msg_len, &tree_oid, parents, result_oid, NULL,
+			NULL))
 		die("Failed to commit notes tree to database");
 }
 
@@ -47,7 +48,7 @@ void commit_notes(struct notes_tree *t, const char *msg)
 	strbuf_addstr(&buf, msg);
 	strbuf_complete_line(&buf);
 
-	create_notes_commit(t, NULL, buf.buf, buf.len, commit_oid.hash);
+	create_notes_commit(t, NULL, buf.buf, buf.len, &commit_oid);
 	strbuf_insert(&buf, 0, "notes: ", 7); /* commit message starts at index 7 */
 	update_ref(buf.buf, t->update_ref, &commit_oid, NULL, 0,
 		   UPDATE_REFS_DIE_ON_ERR);
diff --git a/notes-utils.h b/notes-utils.h
index 1190578398..5d79cbef51 100644
--- a/notes-utils.h
+++ b/notes-utils.h
@@ -15,7 +15,8 @@
  * The resulting commit SHA1 is stored in result_sha1.
  */
 void create_notes_commit(struct notes_tree *t, struct commit_list *parents,
-			 const char *msg, size_t msg_len, unsigned char *result_sha1);
+			 const char *msg, size_t msg_len,
+			 struct object_id *result_oid);
 
 void commit_notes(struct notes_tree *t, const char *msg);
 
-- 
2.14.3

[PATCH v4 07/12] notes: convert combine_notes_* to object_id

[Patryk Obara]

Convert the definition and declarations of combine_notes_* functions
to struct object_id and adjust usage of these functions.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 notes.c | 46 +++++++++++++++++++++++-----------------------
 notes.h | 25 +++++++++++++++----------
 2 files changed, 38 insertions(+), 33 deletions(-)

diff --git a/notes.c b/notes.c
index c7f21fae44..3f4f94507a 100644
--- a/notes.c
+++ b/notes.c
@@ -270,8 +270,8 @@ static int note_tree_insert(struct notes_tree *t, struct int_node *tree,
 				if (!oidcmp(&l->val_oid, &entry->val_oid))
 					return 0;
 
-				ret = combine_notes(l->val_oid.hash,
-						    entry->val_oid.hash);
+				ret = combine_notes(&l->val_oid,
+						    &entry->val_oid);
 				if (!ret && is_null_oid(&l->val_oid))
 					note_tree_remove(t, tree, n, entry);
 				free(entry);
@@ -786,8 +786,8 @@ static int prune_notes_helper(const struct object_id *object_oid,
 	return 0;
 }
 
-int combine_notes_concatenate(unsigned char *cur_sha1,
-		const unsigned char *new_sha1)
+int combine_notes_concatenate(struct object_id *cur_oid,
+			      const struct object_id *new_oid)
 {
 	char *cur_msg = NULL, *new_msg = NULL, *buf;
 	unsigned long cur_len, new_len, buf_len;
@@ -795,18 +795,18 @@ int combine_notes_concatenate(unsigned char *cur_sha1,
 	int ret;
 
 	/* read in both note blob objects */
-	if (!is_null_sha1(new_sha1))
-		new_msg = read_sha1_file(new_sha1, &new_type, &new_len);
+	if (!is_null_oid(new_oid))
+		new_msg = read_sha1_file(new_oid->hash, &new_type, &new_len);
 	if (!new_msg || !new_len || new_type != OBJ_BLOB) {
 		free(new_msg);
 		return 0;
 	}
-	if (!is_null_sha1(cur_sha1))
-		cur_msg = read_sha1_file(cur_sha1, &cur_type, &cur_len);
+	if (!is_null_oid(cur_oid))
+		cur_msg = read_sha1_file(cur_oid->hash, &cur_type, &cur_len);
 	if (!cur_msg || !cur_len || cur_type != OBJ_BLOB) {
 		free(cur_msg);
 		free(new_msg);
-		hashcpy(cur_sha1, new_sha1);
+		oidcpy(cur_oid, new_oid);
 		return 0;
 	}
 
@@ -825,20 +825,20 @@ int combine_notes_concatenate(unsigned char *cur_sha1,
 	free(new_msg);
 
 	/* create a new blob object from buf */
-	ret = write_sha1_file(buf, buf_len, blob_type, cur_sha1);
+	ret = write_sha1_file(buf, buf_len, blob_type, cur_oid->hash);
 	free(buf);
 	return ret;
 }
 
-int combine_notes_overwrite(unsigned char *cur_sha1,
-		const unsigned char *new_sha1)
+int combine_notes_overwrite(struct object_id *cur_oid,
+			    const struct object_id *new_oid)
 {
-	hashcpy(cur_sha1, new_sha1);
+	oidcpy(cur_oid, new_oid);
 	return 0;
 }
 
-int combine_notes_ignore(unsigned char *cur_sha1,
-		const unsigned char *new_sha1)
+int combine_notes_ignore(struct object_id *cur_oid,
+			 const struct object_id *new_oid)
 {
 	return 0;
 }
@@ -848,17 +848,17 @@ int combine_notes_ignore(unsigned char *cur_sha1,
  * newlines removed.
  */
 static int string_list_add_note_lines(struct string_list *list,
-				      const unsigned char *sha1)
+				      const struct object_id *oid)
 {
 	char *data;
 	unsigned long len;
 	enum object_type t;
 
-	if (is_null_sha1(sha1))
+	if (is_null_oid(oid))
 		return 0;
 
 	/* read_sha1_file NUL-terminates */
-	data = read_sha1_file(sha1, &t, &len);
+	data = read_sha1_file(oid->hash, &t, &len);
 	if (t != OBJ_BLOB || !data || !len) {
 		free(data);
 		return t != OBJ_BLOB || !data;
@@ -884,17 +884,17 @@ static int string_list_join_lines_helper(struct string_list_item *item,
 	return 0;
 }
 
-int combine_notes_cat_sort_uniq(unsigned char *cur_sha1,
-		const unsigned char *new_sha1)
+int combine_notes_cat_sort_uniq(struct object_id *cur_oid,
+				const struct object_id *new_oid)
 {
 	struct string_list sort_uniq_list = STRING_LIST_INIT_DUP;
 	struct strbuf buf = STRBUF_INIT;
 	int ret = 1;
 
 	/* read both note blob objects into unique_lines */
-	if (string_list_add_note_lines(&sort_uniq_list, cur_sha1))
+	if (string_list_add_note_lines(&sort_uniq_list, cur_oid))
 		goto out;
-	if (string_list_add_note_lines(&sort_uniq_list, new_sha1))
+	if (string_list_add_note_lines(&sort_uniq_list, new_oid))
 		goto out;
 	string_list_remove_empty_items(&sort_uniq_list, 0);
 	string_list_sort(&sort_uniq_list);
@@ -905,7 +905,7 @@ int combine_notes_cat_sort_uniq(unsigned char *cur_sha1,
 				 string_list_join_lines_helper, &buf))
 		goto out;
 
-	ret = write_sha1_file(buf.buf, buf.len, blob_type, cur_sha1);
+	ret = write_sha1_file(buf.buf, buf.len, blob_type, cur_oid->hash);
 
 out:
 	strbuf_release(&buf);
diff --git a/notes.h b/notes.h
index 3848c2fb3f..88da38b5f4 100644
--- a/notes.h
+++ b/notes.h
@@ -9,27 +9,32 @@
  * When adding a new note annotating the same object as an existing note, it is
  * up to the caller to decide how to combine the two notes. The decision is
  * made by passing in a function of the following form. The function accepts
- * two SHA1s -- of the existing note and the new note, respectively. The
+ * two object_ids -- of the existing note and the new note, respectively. The
  * function then combines the notes in whatever way it sees fit, and writes the
- * resulting SHA1 into the first SHA1 argument (cur_sha1). A non-zero return
+ * resulting oid into the first argument (cur_oid). A non-zero return
  * value indicates failure.
  *
- * The two given SHA1s shall both be non-NULL and different from each other.
- * Either of them (but not both) may be == null_sha1, which indicates an
- * empty/non-existent note. If the resulting SHA1 (cur_sha1) is == null_sha1,
+ * The two given object_ids shall both be non-NULL and different from each
+ * other. Either of them (but not both) may be == null_oid, which indicates an
+ * empty/non-existent note. If the resulting oid (cur_oid) is == null_oid,
  * the note will be removed from the notes tree.
  *
  * The default combine_notes function (you get this when passing NULL) is
  * combine_notes_concatenate(), which appends the contents of the new note to
  * the contents of the existing note.
  */
-typedef int (*combine_notes_fn)(unsigned char *cur_sha1, const unsigned char *new_sha1);
+typedef int (*combine_notes_fn)(struct object_id *cur_oid,
+				const struct object_id *new_oid);
 
 /* Common notes combinators */
-int combine_notes_concatenate(unsigned char *cur_sha1, const unsigned char *new_sha1);
-int combine_notes_overwrite(unsigned char *cur_sha1, const unsigned char *new_sha1);
-int combine_notes_ignore(unsigned char *cur_sha1, const unsigned char *new_sha1);
-int combine_notes_cat_sort_uniq(unsigned char *cur_sha1, const unsigned char *new_sha1);
+int combine_notes_concatenate(struct object_id *cur_oid,
+			      const struct object_id *new_oid);
+int combine_notes_overwrite(struct object_id *cur_oid,
+			    const struct object_id *new_oid);
+int combine_notes_ignore(struct object_id *cur_oid,
+			 const struct object_id *new_oid);
+int combine_notes_cat_sort_uniq(struct object_id *cur_oid,
+				const struct object_id *new_oid);
 
 /*
  * Notes tree object
-- 
2.14.3

[PATCH v4 08/12] notes: convert write_notes_tree to object_id

[Patryk Obara]

Convert the definition and declaration of write_notes_tree to
struct object_id and adjust usage of this function.

Additionally, improve style of small part of this function, as old
formatting made it hard to understand at glance what this part of
code is doing.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 notes-cache.c |  2 +-
 notes-utils.c |  2 +-
 notes.c       | 16 +++++++++-------
 notes.h       |  4 ++--
 4 files changed, 13 insertions(+), 11 deletions(-)

diff --git a/notes-cache.c b/notes-cache.c
index d2f87147cc..010ad236cb 100644
--- a/notes-cache.c
+++ b/notes-cache.c
@@ -54,7 +54,7 @@ int notes_cache_write(struct notes_cache *c)
 	if (!c->tree.dirty)
 		return 0;
 
-	if (write_notes_tree(&c->tree, tree_oid.hash))
+	if (write_notes_tree(&c->tree, &tree_oid))
 		return -1;
 	if (commit_tree(c->validity, strlen(c->validity), &tree_oid, NULL,
 			&commit_oid, NULL, NULL) < 0)
diff --git a/notes-utils.c b/notes-utils.c
index 058c642dac..02407fe2a7 100644
--- a/notes-utils.c
+++ b/notes-utils.c
@@ -12,7 +12,7 @@ void create_notes_commit(struct notes_tree *t, struct commit_list *parents,
 
 	assert(t->initialized);
 
-	if (write_notes_tree(t, tree_oid.hash))
+	if (write_notes_tree(t, &tree_oid))
 		die("Failed to write notes tree to database");
 
 	if (!parents) {
diff --git a/notes.c b/notes.c
index 3f4f94507a..09ef1ce33a 100644
--- a/notes.c
+++ b/notes.c
@@ -1123,11 +1123,12 @@ int for_each_note(struct notes_tree *t, int flags, each_note_fn fn,
 	return for_each_note_helper(t, t->root, 0, 0, flags, fn, cb_data);
 }
 
-int write_notes_tree(struct notes_tree *t, unsigned char *result)
+int write_notes_tree(struct notes_tree *t, struct object_id *result)
 {
 	struct tree_write_stack root;
 	struct write_each_note_data cb_data;
 	int ret;
+	int flags;
 
 	if (!t)
 		t = &default_notes_tree;
@@ -1141,12 +1142,13 @@ int write_notes_tree(struct notes_tree *t, unsigned char *result)
 	cb_data.next_non_note = t->first_non_note;
 
 	/* Write tree objects representing current notes tree */
-	ret = for_each_note(t, FOR_EACH_NOTE_DONT_UNPACK_SUBTREES |
-				FOR_EACH_NOTE_YIELD_SUBTREES,
-			write_each_note, &cb_data) ||
-		write_each_non_note_until(NULL, &cb_data) ||
-		tree_write_stack_finish_subtree(&root) ||
-		write_sha1_file(root.buf.buf, root.buf.len, tree_type, result);
+	flags = FOR_EACH_NOTE_DONT_UNPACK_SUBTREES |
+		FOR_EACH_NOTE_YIELD_SUBTREES;
+	ret = for_each_note(t, flags, write_each_note, &cb_data) ||
+	      write_each_non_note_until(NULL, &cb_data) ||
+	      tree_write_stack_finish_subtree(&root) ||
+	      write_sha1_file(root.buf.buf, root.buf.len, tree_type,
+			      result->hash);
 	strbuf_release(&root.buf);
 	return ret;
 }
diff --git a/notes.h b/notes.h
index 88da38b5f4..0433f45db5 100644
--- a/notes.h
+++ b/notes.h
@@ -217,7 +217,7 @@ int for_each_note(struct notes_tree *t, int flags, each_note_fn fn,
  * Write the given notes_tree structure to the object database
  *
  * Creates a new tree object encapsulating the current state of the given
- * notes_tree, and stores its SHA1 into the 'result' argument.
+ * notes_tree, and stores its object id into the 'result' argument.
  *
  * Returns zero on success, non-zero on failure.
  *
@@ -225,7 +225,7 @@ int for_each_note(struct notes_tree *t, int flags, each_note_fn fn,
  * this function has returned zero. Please also remember to create a
  * corresponding commit object, and update the appropriate notes ref.
  */
-int write_notes_tree(struct notes_tree *t, unsigned char *result);
+int write_notes_tree(struct notes_tree *t, struct object_id *result);
 
 /* Flags controlling the operation of prune */
 #define NOTES_PRUNE_VERBOSE 1
-- 
2.14.3

[PATCH v4 09/12] sha1_file: convert write_sha1_file to object_id

[Patryk Obara]

Convert the definition and declaration of write_sha1_file to
struct object_id and adjust usage of this function.

This commit also converts static function write_sha1_file_prepare, as it
is closely related.

Rename these functions to write_object_file and
write_object_file_prepare respectively.

Replace sha1_to_hex, hashcpy and hashclr with their oid equivalents
wherever possible.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 apply.c                  |  8 ++++----
 builtin/checkout.c       |  3 +--
 builtin/mktag.c          |  6 +++---
 builtin/mktree.c         | 10 +++++-----
 builtin/notes.c          |  8 ++++----
 builtin/receive-pack.c   | 11 ++++++-----
 builtin/replace.c        |  2 +-
 builtin/tag.c            |  2 +-
 builtin/unpack-objects.c |  9 ++++++---
 cache-tree.c             |  5 +++--
 cache.h                  |  4 +++-
 commit.c                 |  2 +-
 match-trees.c            |  2 +-
 merge-recursive.c        |  5 +++--
 notes-cache.c            |  2 +-
 notes.c                  |  9 ++++-----
 read-cache.c             |  6 +++---
 sha1_file.c              | 29 +++++++++++++++--------------
 18 files changed, 65 insertions(+), 58 deletions(-)

diff --git a/apply.c b/apply.c
index 57ab8a8a29..4cd4504008 100644
--- a/apply.c
+++ b/apply.c
@@ -3554,7 +3554,7 @@ static int try_threeway(struct apply_state *state,
 
 	/* Preimage the patch was prepared for */
 	if (patch->is_new)
-		write_sha1_file("", 0, blob_type, pre_oid.hash);
+		write_object_file("", 0, blob_type, &pre_oid);
 	else if (get_oid(patch->old_sha1_prefix, &pre_oid) ||
 		 read_blob_object(&buf, &pre_oid, patch->old_mode))
 		return error(_("repository lacks the necessary blob to fall back on 3-way merge."));
@@ -3570,7 +3570,7 @@ static int try_threeway(struct apply_state *state,
 		return -1;
 	}
 	/* post_oid is theirs */
-	write_sha1_file(tmp_image.buf, tmp_image.len, blob_type, post_oid.hash);
+	write_object_file(tmp_image.buf, tmp_image.len, blob_type, &post_oid);
 	clear_image(&tmp_image);
 
 	/* our_oid is ours */
@@ -3583,7 +3583,7 @@ static int try_threeway(struct apply_state *state,
 			return error(_("cannot read the current contents of '%s'"),
 				     patch->old_name);
 	}
-	write_sha1_file(tmp_image.buf, tmp_image.len, blob_type, our_oid.hash);
+	write_object_file(tmp_image.buf, tmp_image.len, blob_type, &our_oid);
 	clear_image(&tmp_image);
 
 	/* in-core three-way merge between post and our using pre as base */
@@ -4291,7 +4291,7 @@ static int add_index_file(struct apply_state *state,
 			}
 			fill_stat_cache_info(ce, &st);
 		}
-		if (write_sha1_file(buf, size, blob_type, ce->oid.hash) < 0) {
+		if (write_object_file(buf, size, blob_type, &ce->oid) < 0) {
 			free(ce);
 			return error(_("unable to create backing store "
 				       "for newly created file %s"), path);
diff --git a/builtin/checkout.c b/builtin/checkout.c
index c54c78df54..191b96c49c 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -227,8 +227,7 @@ static int checkout_merged(int pos, const struct checkout *state)
 	 * (it also writes the merge result to the object database even
 	 * when it may contain conflicts).
 	 */
-	if (write_sha1_file(result_buf.ptr, result_buf.size,
-			    blob_type, oid.hash))
+	if (write_object_file(result_buf.ptr, result_buf.size, blob_type, &oid))
 		die(_("Unable to add merge result for '%s'"), path);
 	free(result_buf.ptr);
 	ce = make_cache_entry(mode, oid.hash, path, 2, 0);
diff --git a/builtin/mktag.c b/builtin/mktag.c
index 031b750f06..beb552847b 100644
--- a/builtin/mktag.c
+++ b/builtin/mktag.c
@@ -151,7 +151,7 @@ static int verify_tag(char *buffer, unsigned long size)
 int cmd_mktag(int argc, const char **argv, const char *prefix)
 {
 	struct strbuf buf = STRBUF_INIT;
-	unsigned char result_sha1[20];
+	struct object_id result;
 
 	if (argc != 1)
 		usage("git mktag");
@@ -165,10 +165,10 @@ int cmd_mktag(int argc, const char **argv, const char *prefix)
 	if (verify_tag(buf.buf, buf.len) < 0)
 		die("invalid tag signature file");
 
-	if (write_sha1_file(buf.buf, buf.len, tag_type, result_sha1) < 0)
+	if (write_object_file(buf.buf, buf.len, tag_type, &result) < 0)
 		die("unable to write tag file");
 
 	strbuf_release(&buf);
-	printf("%s\n", sha1_to_hex(result_sha1));
+	printf("%s\n", oid_to_hex(&result));
 	return 0;
 }
diff --git a/builtin/mktree.c b/builtin/mktree.c
index da0fd8cd70..8dd9f52f77 100644
--- a/builtin/mktree.c
+++ b/builtin/mktree.c
@@ -40,7 +40,7 @@ static int ent_compare(const void *a_, const void *b_)
 				 b->name, b->len, b->mode);
 }
 
-static void write_tree(unsigned char *sha1)
+static void write_tree(struct object_id *oid)
 {
 	struct strbuf buf;
 	size_t size;
@@ -57,7 +57,7 @@ static void write_tree(unsigned char *sha1)
 		strbuf_add(&buf, ent->sha1, 20);
 	}
 
-	write_sha1_file(buf.buf, buf.len, tree_type, sha1);
+	write_object_file(buf.buf, buf.len, tree_type, oid);
 	strbuf_release(&buf);
 }
 
@@ -142,7 +142,7 @@ static void mktree_line(char *buf, size_t len, int nul_term_line, int allow_miss
 int cmd_mktree(int ac, const char **av, const char *prefix)
 {
 	struct strbuf sb = STRBUF_INIT;
-	unsigned char sha1[20];
+	struct object_id oid;
 	int nul_term_line = 0;
 	int allow_missing = 0;
 	int is_batch_mode = 0;
@@ -181,8 +181,8 @@ int cmd_mktree(int ac, const char **av, const char *prefix)
 			 */
 			; /* skip creating an empty tree */
 		} else {
-			write_tree(sha1);
-			puts(sha1_to_hex(sha1));
+			write_tree(&oid);
+			puts(oid_to_hex(&oid));
 			fflush(stdout);
 		}
 		used=0; /* reset tree entry buffer for re-use in batch mode */
diff --git a/builtin/notes.c b/builtin/notes.c
index 7c81761645..39304ba743 100644
--- a/builtin/notes.c
+++ b/builtin/notes.c
@@ -198,9 +198,9 @@ static void prepare_note_data(const struct object_id *object, struct note_data *
 	}
 }
 
-static void write_note_data(struct note_data *d, unsigned char *sha1)
+static void write_note_data(struct note_data *d, struct object_id *oid)
 {
-	if (write_sha1_file(d->buf.buf, d->buf.len, blob_type, sha1)) {
+	if (write_object_file(d->buf.buf, d->buf.len, blob_type, oid)) {
 		error(_("unable to write note object"));
 		if (d->edit_path)
 			error(_("the note contents have been left in %s"),
@@ -459,7 +459,7 @@ static int add(int argc, const char **argv, const char *prefix)
 
 	prepare_note_data(&object, &d, note ? note->hash : NULL);
 	if (d.buf.len || allow_empty) {
-		write_note_data(&d, new_note.hash);
+		write_note_data(&d, &new_note);
 		if (add_note(t, &object, &new_note, combine_notes_overwrite))
 			die("BUG: combine_notes_overwrite failed");
 		commit_notes(t, "Notes added by 'git notes add'");
@@ -619,7 +619,7 @@ static int append_edit(int argc, const char **argv, const char *prefix)
 	}
 
 	if (d.buf.len || allow_empty) {
-		write_note_data(&d, new_note.hash);
+		write_note_data(&d, &new_note);
 		if (add_note(t, &object, &new_note, combine_notes_overwrite))
 			die("BUG: combine_notes_overwrite failed");
 		logmsg = xstrfmt("Notes added by 'git notes %s'", argv[0]);
diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index b7ce7c7f52..75e7f18ace 100644
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -69,7 +69,7 @@ static int sent_capabilities;
 static int shallow_update;
 static const char *alt_shallow_file;
 static struct strbuf push_cert = STRBUF_INIT;
-static unsigned char push_cert_sha1[20];
+static struct object_id push_cert_oid;
 static struct signature_check sigcheck;
 static const char *push_cert_nonce;
 static const char *cert_nonce_seed;
@@ -633,8 +633,9 @@ static void prepare_push_cert_sha1(struct child_process *proc)
 		int bogs /* beginning_of_gpg_sig */;
 
 		already_done = 1;
-		if (write_sha1_file(push_cert.buf, push_cert.len, "blob", push_cert_sha1))
-			hashclr(push_cert_sha1);
+		if (write_object_file(push_cert.buf, push_cert.len, "blob",
+				      &push_cert_oid))
+			oidclr(&push_cert_oid);
 
 		memset(&sigcheck, '\0', sizeof(sigcheck));
 		sigcheck.result = 'N';
@@ -655,9 +656,9 @@ static void prepare_push_cert_sha1(struct child_process *proc)
 		strbuf_release(&gpg_status);
 		nonce_status = check_nonce(push_cert.buf, bogs);
 	}
-	if (!is_null_sha1(push_cert_sha1)) {
+	if (!is_null_oid(&push_cert_oid)) {
 		argv_array_pushf(&proc->env_array, "GIT_PUSH_CERT=%s",
-				 sha1_to_hex(push_cert_sha1));
+				 oid_to_hex(&push_cert_oid));
 		argv_array_pushf(&proc->env_array, "GIT_PUSH_CERT_SIGNER=%s",
 				 sigcheck.signer ? sigcheck.signer : "");
 		argv_array_pushf(&proc->env_array, "GIT_PUSH_CERT_KEY=%s",
diff --git a/builtin/replace.c b/builtin/replace.c
index 814bf6bfde..83d3235721 100644
--- a/builtin/replace.c
+++ b/builtin/replace.c
@@ -410,7 +410,7 @@ static int create_graft(int argc, const char **argv, int force)
 
 	check_mergetags(commit, argc, argv);
 
-	if (write_sha1_file(buf.buf, buf.len, commit_type, new.hash))
+	if (write_object_file(buf.buf, buf.len, commit_type, &new))
 		die(_("could not write replacement commit for: '%s'"), old_ref);
 
 	strbuf_release(&buf);
diff --git a/builtin/tag.c b/builtin/tag.c
index a7e6a5b0f2..8885e21ddc 100644
--- a/builtin/tag.c
+++ b/builtin/tag.c
@@ -187,7 +187,7 @@ static int build_tag_object(struct strbuf *buf, int sign, struct object_id *resu
 {
 	if (sign && do_sign(buf) < 0)
 		return error(_("unable to sign the tag"));
-	if (write_sha1_file(buf->buf, buf->len, tag_type, result->hash) < 0)
+	if (write_object_file(buf->buf, buf->len, tag_type, result) < 0)
 		return error(_("unable to write tag file"));
 	return 0;
 }
diff --git a/builtin/unpack-objects.c b/builtin/unpack-objects.c
index 85a40d1af7..397371eb3d 100644
--- a/builtin/unpack-objects.c
+++ b/builtin/unpack-objects.c
@@ -172,7 +172,8 @@ static void write_cached_object(struct object *obj, struct obj_buffer *obj_buf)
 {
 	struct object_id oid;
 
-	if (write_sha1_file(obj_buf->buffer, obj_buf->size, typename(obj->type), oid.hash) < 0)
+	if (write_object_file(obj_buf->buffer, obj_buf->size,
+			      typename(obj->type), &oid) < 0)
 		die("failed to write object %s", oid_to_hex(&obj->oid));
 	obj->flags |= FLAG_WRITTEN;
 }
@@ -237,14 +238,16 @@ static void write_object(unsigned nr, enum object_type type,
 			 void *buf, unsigned long size)
 {
 	if (!strict) {
-		if (write_sha1_file(buf, size, typename(type), obj_list[nr].oid.hash) < 0)
+		if (write_object_file(buf, size, typename(type),
+				      &obj_list[nr].oid) < 0)
 			die("failed to write object");
 		added_object(nr, type, buf, size);
 		free(buf);
 		obj_list[nr].obj = NULL;
 	} else if (type == OBJ_BLOB) {
 		struct blob *blob;
-		if (write_sha1_file(buf, size, typename(type), obj_list[nr].oid.hash) < 0)
+		if (write_object_file(buf, size, typename(type),
+				      &obj_list[nr].oid) < 0)
 			die("failed to write object");
 		added_object(nr, type, buf, size);
 		free(buf);
diff --git a/cache-tree.c b/cache-tree.c
index 6574eeb80d..597114f604 100644
--- a/cache-tree.c
+++ b/cache-tree.c
@@ -406,9 +406,10 @@ static int update_one(struct cache_tree *it,
 			oidcpy(&it->oid, &oid);
 		else
 			to_invalidate = 1;
-	} else if (dryrun)
+	} else if (dryrun) {
 		hash_object_file(buffer.buf, buffer.len, tree_type, &it->oid);
-	else if (write_sha1_file(buffer.buf, buffer.len, tree_type, it->oid.hash)) {
+	} else if (write_object_file(buffer.buf, buffer.len, tree_type,
+				     &it->oid)) {
 		strbuf_release(&buffer);
 		return -1;
 	}
diff --git a/cache.h b/cache.h
index d5d78d6a51..d80141eb64 100644
--- a/cache.h
+++ b/cache.h
@@ -1240,7 +1240,9 @@ extern int sha1_object_info(const unsigned char *, unsigned long *);
 extern int hash_object_file(const void *buf, unsigned long len,
 			    const char *type, struct object_id *oid);
 
-extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
+extern int write_object_file(const void *buf, unsigned long len,
+			     const char *type, struct object_id *oid);
+
 extern int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type, struct object_id *oid, unsigned flags);
 
 extern int pretend_object_file(void *, unsigned long, enum object_type,
diff --git a/commit.c b/commit.c
index 643f3daec3..0d32532872 100644
--- a/commit.c
+++ b/commit.c
@@ -1567,7 +1567,7 @@ int commit_tree_extended(const char *msg, size_t msg_len,
 		goto out;
 	}
 
-	result = write_sha1_file(buffer.buf, buffer.len, commit_type, ret->hash);
+	result = write_object_file(buffer.buf, buffer.len, commit_type, ret);
 out:
 	strbuf_release(&buffer);
 	return result;
diff --git a/match-trees.c b/match-trees.c
index afb771c4f5..0ca99d5162 100644
--- a/match-trees.c
+++ b/match-trees.c
@@ -214,7 +214,7 @@ static int splice_tree(const struct object_id *oid1, const char *prefix,
 		rewrite_with = oid2;
 	}
 	oidcpy(rewrite_here, rewrite_with);
-	status = write_sha1_file(buf, sz, tree_type, result->hash);
+	status = write_object_file(buf, sz, tree_type, result);
 	free(buf);
 	return status;
 }
diff --git a/merge-recursive.c b/merge-recursive.c
index cc5fa0a949..fe3c0c8076 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -1009,8 +1009,9 @@ static int merge_file_1(struct merge_options *o,
 			if ((merge_status < 0) || !result_buf.ptr)
 				ret = err(o, _("Failed to execute internal merge"));
 
-			if (!ret && write_sha1_file(result_buf.ptr, result_buf.size,
-						    blob_type, result->oid.hash))
+			if (!ret &&
+			    write_object_file(result_buf.ptr, result_buf.size,
+					      blob_type, &result->oid))
 				ret = err(o, _("Unable to add %s to database"),
 					  a->path);
 
diff --git a/notes-cache.c b/notes-cache.c
index 010ad236cb..398e61d5e9 100644
--- a/notes-cache.c
+++ b/notes-cache.c
@@ -88,7 +88,7 @@ int notes_cache_put(struct notes_cache *c, struct object_id *key_oid,
 {
 	struct object_id value_oid;
 
-	if (write_sha1_file(data, size, "blob", value_oid.hash) < 0)
+	if (write_object_file(data, size, "blob", &value_oid) < 0)
 		return -1;
 	return add_note(&c->tree, key_oid, &value_oid, NULL);
 }
diff --git a/notes.c b/notes.c
index 09ef1ce33a..ce9a8f53f8 100644
--- a/notes.c
+++ b/notes.c
@@ -667,7 +667,7 @@ static int tree_write_stack_finish_subtree(struct tree_write_stack *tws)
 		ret = tree_write_stack_finish_subtree(n);
 		if (ret)
 			return ret;
-		ret = write_sha1_file(n->buf.buf, n->buf.len, tree_type, s.hash);
+		ret = write_object_file(n->buf.buf, n->buf.len, tree_type, &s);
 		if (ret)
 			return ret;
 		strbuf_release(&n->buf);
@@ -825,7 +825,7 @@ int combine_notes_concatenate(struct object_id *cur_oid,
 	free(new_msg);
 
 	/* create a new blob object from buf */
-	ret = write_sha1_file(buf, buf_len, blob_type, cur_oid->hash);
+	ret = write_object_file(buf, buf_len, blob_type, cur_oid);
 	free(buf);
 	return ret;
 }
@@ -905,7 +905,7 @@ int combine_notes_cat_sort_uniq(struct object_id *cur_oid,
 				 string_list_join_lines_helper, &buf))
 		goto out;
 
-	ret = write_sha1_file(buf.buf, buf.len, blob_type, cur_oid->hash);
+	ret = write_object_file(buf.buf, buf.len, blob_type, cur_oid);
 
 out:
 	strbuf_release(&buf);
@@ -1147,8 +1147,7 @@ int write_notes_tree(struct notes_tree *t, struct object_id *result)
 	ret = for_each_note(t, flags, write_each_note, &cb_data) ||
 	      write_each_non_note_until(NULL, &cb_data) ||
 	      tree_write_stack_finish_subtree(&root) ||
-	      write_sha1_file(root.buf.buf, root.buf.len, tree_type,
-			      result->hash);
+	      write_object_file(root.buf.buf, root.buf.len, tree_type, result);
 	strbuf_release(&root.buf);
 	return ret;
 }
diff --git a/read-cache.c b/read-cache.c
index 2eb81a66b9..01bcf7dd84 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -631,10 +631,10 @@ static struct cache_entry *create_alias_ce(struct index_state *istate,
 
 void set_object_name_for_intent_to_add_entry(struct cache_entry *ce)
 {
-	unsigned char sha1[20];
-	if (write_sha1_file("", 0, blob_type, sha1))
+	struct object_id oid;
+	if (write_object_file("", 0, blob_type, &oid))
 		die("cannot create an empty blob in the object database");
-	hashcpy(ce->oid.hash, sha1);
+	oidcpy(&ce->oid, &oid);
 }
 
 int add_to_index(struct index_state *istate, const char *path, struct stat *st, int flags)
diff --git a/sha1_file.c b/sha1_file.c
index 4c44c60cec..d1569b1b96 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1419,9 +1419,9 @@ void *read_object_with_reference(const unsigned char *sha1,
 	}
 }
 
-static void write_sha1_file_prepare(const void *buf, unsigned long len,
-                                    const char *type, unsigned char *sha1,
-                                    char *hdr, int *hdrlen)
+static void write_object_file_prepare(const void *buf, unsigned long len,
+				      const char *type, struct object_id *oid,
+				      char *hdr, int *hdrlen)
 {
 	git_SHA_CTX c;
 
@@ -1432,7 +1432,7 @@ static void write_sha1_file_prepare(const void *buf, unsigned long len,
 	git_SHA1_Init(&c);
 	git_SHA1_Update(&c, hdr, *hdrlen);
 	git_SHA1_Update(&c, buf, len);
-	git_SHA1_Final(sha1, &c);
+	git_SHA1_Final(oid->hash, &c);
 }
 
 /*
@@ -1490,7 +1490,7 @@ int hash_object_file(const void *buf, unsigned long len, const char *type,
 {
 	char hdr[32];
 	int hdrlen = sizeof(hdr);
-	write_sha1_file_prepare(buf, len, type, oid->hash, hdr, &hdrlen);
+	write_object_file_prepare(buf, len, type, oid, hdr, &hdrlen);
 	return 0;
 }
 
@@ -1633,7 +1633,8 @@ static int freshen_packed_object(const unsigned char *sha1)
 	return 1;
 }
 
-int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1)
+int write_object_file(const void *buf, unsigned long len, const char *type,
+		      struct object_id *oid)
 {
 	char hdr[32];
 	int hdrlen = sizeof(hdr);
@@ -1641,10 +1642,10 @@ int write_sha1_file(const void *buf, unsigned long len, const char *type, unsign
 	/* Normally if we have it in the pack then we do not bother writing
 	 * it out into .git/objects/??/?{38} file.
 	 */
-	write_sha1_file_prepare(buf, len, type, sha1, hdr, &hdrlen);
-	if (freshen_packed_object(sha1) || freshen_loose_object(sha1))
+	write_object_file_prepare(buf, len, type, oid, hdr, &hdrlen);
+	if (freshen_packed_object(oid->hash) || freshen_loose_object(oid->hash))
 		return 0;
-	return write_loose_object(sha1, hdr, hdrlen, buf, len, 0);
+	return write_loose_object(oid->hash, hdr, hdrlen, buf, len, 0);
 }
 
 int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type,
@@ -1656,7 +1657,7 @@ int hash_sha1_file_literally(const void *buf, unsigned long len, const char *typ
 	/* type string, SP, %lu of the length plus NUL must fit this */
 	hdrlen = strlen(type) + 32;
 	header = xmalloc(hdrlen);
-	write_sha1_file_prepare(buf, len, type, oid->hash, header, &hdrlen);
+	write_object_file_prepare(buf, len, type, oid, header, &hdrlen);
 
 	if (!(flags & HASH_WRITE_OBJECT))
 		goto cleanup;
@@ -1767,7 +1768,7 @@ static int index_mem(struct object_id *oid, void *buf, size_t size,
 	}
 
 	if (write_object)
-		ret = write_sha1_file(buf, size, typename(type), oid->hash);
+		ret = write_object_file(buf, size, typename(type), oid);
 	else
 		ret = hash_object_file(buf, size, typename(type), oid);
 	if (re_allocated)
@@ -1789,8 +1790,8 @@ static int index_stream_convert_blob(struct object_id *oid, int fd,
 				 get_safe_crlf(flags));
 
 	if (write_object)
-		ret = write_sha1_file(sbuf.buf, sbuf.len, typename(OBJ_BLOB),
-				      oid->hash);
+		ret = write_object_file(sbuf.buf, sbuf.len, typename(OBJ_BLOB),
+					oid);
 	else
 		ret = hash_object_file(sbuf.buf, sbuf.len, typename(OBJ_BLOB),
 				       oid);
@@ -1908,7 +1909,7 @@ int index_path(struct object_id *oid, const char *path, struct stat *st, unsigne
 			return error_errno("readlink(\"%s\")", path);
 		if (!(flags & HASH_WRITE_OBJECT))
 			hash_object_file(sb.buf, sb.len, blob_type, oid);
-		else if (write_sha1_file(sb.buf, sb.len, blob_type, oid->hash))
+		else if (write_object_file(sb.buf, sb.len, blob_type, oid))
 			rc = error("%s: failed to insert into database", path);
 		strbuf_release(&sb);
 		break;
-- 
2.14.3

[PATCH v4 10/12] sha1_file: convert force_object_loose to object_id

[Patryk Obara]

Convert the definition and declaration of force_object_loose to
struct object_id and adjust usage of this function.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 builtin/pack-objects.c |  2 +-
 cache.h                |  3 ++-
 sha1_file.c            | 10 +++++-----
 3 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/builtin/pack-objects.c b/builtin/pack-objects.c
index 6b9cfc289d..f38197543d 100644
--- a/builtin/pack-objects.c
+++ b/builtin/pack-objects.c
@@ -2768,7 +2768,7 @@ static void loosen_unused_packed_objects(struct rev_info *revs)
 			if (!packlist_find(&to_pack, oid.hash, NULL) &&
 			    !has_sha1_pack_kept_or_nonlocal(&oid) &&
 			    !loosened_object_can_be_discarded(&oid, p->mtime))
-				if (force_object_loose(oid.hash, p->mtime))
+				if (force_object_loose(&oid, p->mtime))
 					die("unable to force loose object");
 		}
 	}
diff --git a/cache.h b/cache.h
index d80141eb64..0a8be9c87f 100644
--- a/cache.h
+++ b/cache.h
@@ -1248,7 +1248,8 @@ extern int hash_sha1_file_literally(const void *buf, unsigned long len, const ch
 extern int pretend_object_file(void *, unsigned long, enum object_type,
 			       struct object_id *oid);
 
-extern int force_object_loose(const unsigned char *sha1, time_t mtime);
+extern int force_object_loose(const struct object_id *oid, time_t mtime);
+
 extern int git_open_cloexec(const char *name, int flags);
 #define git_open(name) git_open_cloexec(name, O_RDONLY)
 extern void *map_sha1_file(const unsigned char *sha1, unsigned long *size);
diff --git a/sha1_file.c b/sha1_file.c
index d1569b1b96..d9ee966d74 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1670,7 +1670,7 @@ int hash_sha1_file_literally(const void *buf, unsigned long len, const char *typ
 	return status;
 }
 
-int force_object_loose(const unsigned char *sha1, time_t mtime)
+int force_object_loose(const struct object_id *oid, time_t mtime)
 {
 	void *buf;
 	unsigned long len;
@@ -1679,13 +1679,13 @@ int force_object_loose(const unsigned char *sha1, time_t mtime)
 	int hdrlen;
 	int ret;
 
-	if (has_loose_object(sha1))
+	if (has_loose_object(oid->hash))
 		return 0;
-	buf = read_object(sha1, &type, &len);
+	buf = read_object(oid->hash, &type, &len);
 	if (!buf)
-		return error("cannot read sha1_file for %s", sha1_to_hex(sha1));
+		return error("cannot read sha1_file for %s", oid_to_hex(oid));
 	hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %lu", typename(type), len) + 1;
-	ret = write_loose_object(sha1, hdr, hdrlen, buf, len, mtime);
+	ret = write_loose_object(oid->hash, hdr, hdrlen, buf, len, mtime);
 	free(buf);
 
 	return ret;
-- 
2.14.3

[PATCH v4 11/12] sha1_file: convert write_loose_object to object_id

[Patryk Obara]

Convert the definition and declaration of static write_loose_object
function to struct object_id.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 sha1_file.c | 28 ++++++++++++++++------------
 1 file changed, 16 insertions(+), 12 deletions(-)

diff --git a/sha1_file.c b/sha1_file.c
index d9ee966d74..59238f5bea 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1548,16 +1548,17 @@ static int create_tmpfile(struct strbuf *tmp, const char *filename)
 	return fd;
 }
 
-static int write_loose_object(const unsigned char *sha1, char *hdr, int hdrlen,
-			      const void *buf, unsigned long len, time_t mtime)
+static int write_loose_object(const struct object_id *oid, char *hdr,
+			      int hdrlen, const void *buf, unsigned long len,
+			      time_t mtime)
 {
 	int fd, ret;
 	unsigned char compressed[4096];
 	git_zstream stream;
 	git_SHA_CTX c;
-	unsigned char parano_sha1[20];
+	struct object_id parano_oid;
 	static struct strbuf tmp_file = STRBUF_INIT;
-	const char *filename = sha1_file_name(sha1);
+	const char *filename = sha1_file_name(oid->hash);
 
 	fd = create_tmpfile(&tmp_file, filename);
 	if (fd < 0) {
@@ -1594,13 +1595,16 @@ static int write_loose_object(const unsigned char *sha1, char *hdr, int hdrlen,
 	} while (ret == Z_OK);
 
 	if (ret != Z_STREAM_END)
-		die("unable to deflate new object %s (%d)", sha1_to_hex(sha1), ret);
+		die("unable to deflate new object %s (%d)", oid_to_hex(oid),
+		    ret);
 	ret = git_deflate_end_gently(&stream);
 	if (ret != Z_OK)
-		die("deflateEnd on object %s failed (%d)", sha1_to_hex(sha1), ret);
-	git_SHA1_Final(parano_sha1, &c);
-	if (hashcmp(sha1, parano_sha1) != 0)
-		die("confused by unstable object source data for %s", sha1_to_hex(sha1));
+		die("deflateEnd on object %s failed (%d)", oid_to_hex(oid),
+		    ret);
+	git_SHA1_Final(parano_oid.hash, &c);
+	if (oidcmp(oid, &parano_oid) != 0)
+		die("confused by unstable object source data for %s",
+		    oid_to_hex(oid));
 
 	close_sha1_file(fd);
 
@@ -1645,7 +1649,7 @@ int write_object_file(const void *buf, unsigned long len, const char *type,
 	write_object_file_prepare(buf, len, type, oid, hdr, &hdrlen);
 	if (freshen_packed_object(oid->hash) || freshen_loose_object(oid->hash))
 		return 0;
-	return write_loose_object(oid->hash, hdr, hdrlen, buf, len, 0);
+	return write_loose_object(oid, hdr, hdrlen, buf, len, 0);
 }
 
 int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type,
@@ -1663,7 +1667,7 @@ int hash_sha1_file_literally(const void *buf, unsigned long len, const char *typ
 		goto cleanup;
 	if (freshen_packed_object(oid->hash) || freshen_loose_object(oid->hash))
 		goto cleanup;
-	status = write_loose_object(oid->hash, header, hdrlen, buf, len, 0);
+	status = write_loose_object(oid, header, hdrlen, buf, len, 0);
 
 cleanup:
 	free(header);
@@ -1685,7 +1689,7 @@ int force_object_loose(const struct object_id *oid, time_t mtime)
 	if (!buf)
 		return error("cannot read sha1_file for %s", oid_to_hex(oid));
 	hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %lu", typename(type), len) + 1;
-	ret = write_loose_object(oid->hash, hdr, hdrlen, buf, len, mtime);
+	ret = write_loose_object(oid, hdr, hdrlen, buf, len, mtime);
 	free(buf);
 
 	return ret;
-- 
2.14.3

[PATCH v4 12/12] sha1_file: rename hash_sha1_file_literally

[Patryk Obara]

This function was already converted to use struct object_id earlier.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 builtin/hash-object.c | 3 ++-
 cache.h               | 4 +++-
 sha1_file.c           | 5 +++--
 3 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/builtin/hash-object.c b/builtin/hash-object.c
index c532ff9320..526da5c185 100644
--- a/builtin/hash-object.c
+++ b/builtin/hash-object.c
@@ -24,7 +24,8 @@ static int hash_literally(struct object_id *oid, int fd, const char *type, unsig
 	if (strbuf_read(&buf, fd, 4096) < 0)
 		ret = -1;
 	else
-		ret = hash_sha1_file_literally(buf.buf, buf.len, type, oid, flags);
+		ret = hash_object_file_literally(buf.buf, buf.len, type, oid,
+						 flags);
 	strbuf_release(&buf);
 	return ret;
 }
diff --git a/cache.h b/cache.h
index 0a8be9c87f..6ef4248931 100644
--- a/cache.h
+++ b/cache.h
@@ -1243,7 +1243,9 @@ extern int hash_object_file(const void *buf, unsigned long len,
 extern int write_object_file(const void *buf, unsigned long len,
 			     const char *type, struct object_id *oid);
 
-extern int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type, struct object_id *oid, unsigned flags);
+extern int hash_object_file_literally(const void *buf, unsigned long len,
+				      const char *type, struct object_id *oid,
+				      unsigned flags);
 
 extern int pretend_object_file(void *, unsigned long, enum object_type,
 			       struct object_id *oid);
diff --git a/sha1_file.c b/sha1_file.c
index 59238f5bea..34c041e8cd 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1652,8 +1652,9 @@ int write_object_file(const void *buf, unsigned long len, const char *type,
 	return write_loose_object(oid, hdr, hdrlen, buf, len, 0);
 }
 
-int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type,
-			     struct object_id *oid, unsigned flags)
+int hash_object_file_literally(const void *buf, unsigned long len,
+			       const char *type, struct object_id *oid,
+			       unsigned flags)
 {
 	char *header;
 	int hdrlen, status = 0;
-- 
2.14.3