[PATCH v3 1/5] Move init_skiplist() outside of fsck

[Barret Rhoden <brho@google.com>]

init_skiplist() took a file consisting of SHA-1s and comments and added
the objects to an oidset.  This functionality is useful for other
commands.

Signed-off-by: Barret Rhoden <brho@google.com>
---
 fsck.c                          | 37 +--------------------------------
 oidset.c                        | 35 +++++++++++++++++++++++++++++++
 oidset.h                        |  8 +++++++
 t/t5504-fetch-receive-strict.sh | 14 ++++++-------
 4 files changed, 51 insertions(+), 43 deletions(-)

diff --git a/fsck.c b/fsck.c
index 2260adb71e7a..d45534ad90f5 100644
--- a/fsck.c
+++ b/fsck.c
@@ -181,41 +181,6 @@ static int fsck_msg_type(enum fsck_msg_id msg_id,
 	return msg_type;
 }
 
-static void init_skiplist(struct fsck_options *options, const char *path)
-{
-	FILE *fp;
-	struct strbuf sb = STRBUF_INIT;
-	struct object_id oid;
-
-	fp = fopen(path, "r");
-	if (!fp)
-		die("Could not open skip list: %s", path);
-	while (!strbuf_getline(&sb, fp)) {
-		const char *p;
-		const char *hash;
-
-		/*
-		 * Allow trailing comments, leading whitespace
-		 * (including before commits), and empty or whitespace
-		 * only lines.
-		 */
-		hash = strchr(sb.buf, '#');
-		if (hash)
-			strbuf_setlen(&sb, hash - sb.buf);
-		strbuf_trim(&sb);
-		if (!sb.len)
-			continue;
-
-		if (parse_oid_hex(sb.buf, &oid, &p) || *p != '\0')
-			die("Invalid SHA-1: %s", sb.buf);
-		oidset_insert(&options->skiplist, &oid);
-	}
-	if (ferror(fp))
-		die_errno("Could not read '%s'", path);
-	fclose(fp);
-	strbuf_release(&sb);
-}
-
 static int parse_msg_type(const char *str)
 {
 	if (!strcmp(str, "error"))
@@ -284,7 +249,7 @@ void fsck_set_msg_types(struct fsck_options *options, const char *values)
 		if (!strcmp(buf, "skiplist")) {
 			if (equal == len)
 				die("skiplist requires a path");
-			init_skiplist(options, buf + equal + 1);
+			oidset_parse_file(&options->skiplist, buf + equal + 1);
 			buf += len + 1;
 			continue;
 		}
diff --git a/oidset.c b/oidset.c
index fe4eb921df81..878a1b56af1c 100644
--- a/oidset.c
+++ b/oidset.c
@@ -35,3 +35,38 @@ void oidset_clear(struct oidset *set)
 	kh_release_oid(&set->set);
 	oidset_init(set, 0);
 }
+
+void oidset_parse_file(struct oidset *set, const char *path)
+{
+	FILE *fp;
+	struct strbuf sb = STRBUF_INIT;
+	struct object_id oid;
+
+	fp = fopen(path, "r");
+	if (!fp)
+		die("Could not open object name list: %s", path);
+	while (!strbuf_getline(&sb, fp)) {
+		const char *p;
+		const char *name;
+
+		/*
+		 * Allow trailing comments, leading whitespace
+		 * (including before commits), and empty or whitespace
+		 * only lines.
+		 */
+		name = strchr(sb.buf, '#');
+		if (name)
+			strbuf_setlen(&sb, name - sb.buf);
+		strbuf_trim(&sb);
+		if (!sb.len)
+			continue;
+
+		if (parse_oid_hex(sb.buf, &oid, &p) || *p != '\0')
+			die("Invalid object name: %s", sb.buf);
+		oidset_insert(set, &oid);
+	}
+	if (ferror(fp))
+		die_errno("Could not read '%s'", path);
+	fclose(fp);
+	strbuf_release(&sb);
+}
diff --git a/oidset.h b/oidset.h
index c9d0f6d3cc8b..c4807749df8d 100644
--- a/oidset.h
+++ b/oidset.h
@@ -73,6 +73,14 @@ int oidset_remove(struct oidset *set, const struct object_id *oid);
  */
 void oidset_clear(struct oidset *set);
 
+/**
+ * Add the contents of the file 'path' to an initialized oidset.  Each line is
+ * an unabbreviated object name.  Comments begin with '#', and trailing comments
+ * are allowed.  Leading whitespace and empty or white-space only lines are
+ * ignored.
+ */
+void oidset_parse_file(struct oidset *set, const char *path);
+
 struct oidset_iter {
 	kh_oid_t *set;
 	khiter_t iter;
diff --git a/t/t5504-fetch-receive-strict.sh b/t/t5504-fetch-receive-strict.sh
index 7bc706873c5b..7184f1d07f90 100755
--- a/t/t5504-fetch-receive-strict.sh
+++ b/t/t5504-fetch-receive-strict.sh
@@ -164,9 +164,9 @@ test_expect_success 'fsck with unsorted skipList' '
 test_expect_success 'fsck with invalid or bogus skipList input' '
 	git -c fsck.skipList=/dev/null -c fsck.missingEmail=ignore fsck &&
 	test_must_fail git -c fsck.skipList=does-not-exist -c fsck.missingEmail=ignore fsck 2>err &&
-	test_i18ngrep "Could not open skip list: does-not-exist" err &&
+	test_i18ngrep "Could not open object name list: does-not-exist" err &&
 	test_must_fail git -c fsck.skipList=.git/config -c fsck.missingEmail=ignore fsck 2>err &&
-	test_i18ngrep "Invalid SHA-1: \[core\]" err
+	test_i18ngrep "Invalid object name: \[core\]" err
 '
 
 test_expect_success 'fsck with other accepted skipList input (comments & empty lines)' '
@@ -193,7 +193,7 @@ test_expect_success 'fsck no garbage output from comments & empty lines errors'
 test_expect_success 'fsck with invalid abbreviated skipList input' '
 	echo $commit | test_copy_bytes 20 >SKIP.abbreviated &&
 	test_must_fail git -c fsck.skipList=SKIP.abbreviated fsck 2>err-abbreviated &&
-	test_i18ngrep "^fatal: Invalid SHA-1: " err-abbreviated
+	test_i18ngrep "^fatal: Invalid object name: " err-abbreviated
 '
 
 test_expect_success 'fsck with exhaustive accepted skipList input (various types of comments etc.)' '
@@ -226,10 +226,10 @@ test_expect_success 'push with receive.fsck.skipList' '
 	test_must_fail git push --porcelain dst bogus &&
 	git --git-dir=dst/.git config receive.fsck.skipList does-not-exist &&
 	test_must_fail git push --porcelain dst bogus 2>err &&
-	test_i18ngrep "Could not open skip list: does-not-exist" err &&
+	test_i18ngrep "Could not open object name list: does-not-exist" err &&
 	git --git-dir=dst/.git config receive.fsck.skipList config &&
 	test_must_fail git push --porcelain dst bogus 2>err &&
-	test_i18ngrep "Invalid SHA-1: \[core\]" err &&
+	test_i18ngrep "Invalid object name: \[core\]" err &&
 
 	git --git-dir=dst/.git config receive.fsck.skipList SKIP &&
 	git push --porcelain dst bogus
@@ -255,10 +255,10 @@ test_expect_success 'fetch with fetch.fsck.skipList' '
 	test_must_fail git --git-dir=dst/.git fetch "file://$(pwd)" $refspec &&
 	git --git-dir=dst/.git config fetch.fsck.skipList does-not-exist &&
 	test_must_fail git --git-dir=dst/.git fetch "file://$(pwd)" $refspec 2>err &&
-	test_i18ngrep "Could not open skip list: does-not-exist" err &&
+	test_i18ngrep "Could not open object name list: does-not-exist" err &&
 	git --git-dir=dst/.git config fetch.fsck.skipList dst/.git/config &&
 	test_must_fail git --git-dir=dst/.git fetch "file://$(pwd)" $refspec 2>err &&
-	test_i18ngrep "Invalid SHA-1: \[core\]" err &&
+	test_i18ngrep "Invalid object name: \[core\]" err &&
 
 	git --git-dir=dst/.git config fetch.fsck.skipList dst/.git/SKIP &&
 	git --git-dir=dst/.git fetch "file://$(pwd)" $refspec
-- 
2.21.0.rc0.258.g878e2cd30e-goog