[PATCH][RFC] read-cache: read_index_from() accepts repo as arg

[Kapil Jain <jkapil.cs@gmail.com>]

Signed-off-by: Kapil Jain <jkapil.cs@gmail.com>
---

In read-cache, the read_index_from() function had a TODO task,
this patch completes that. There are some other functions in the same file
where this exact TODO needs to be done, will proceed to do them once this patch is accepted.

running test gave 256 not okays, each had a label as `# TODO known breakage`, which i think
are not concerned to this patch.

 apply.c            | 2 +-
 builtin/worktree.c | 2 +-
 cache-tree.c       | 2 +-
 cache.h            | 4 ++--
 read-cache.c       | 4 ++--
 repository.c       | 2 +-
 revision.c         | 2 +-
 7 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/apply.c b/apply.c
index f15afa9f6a..3b4d128149 100644
--- a/apply.c
+++ b/apply.c
@@ -4021,7 +4021,7 @@ static int read_apply_cache(struct apply_state *state)
 {
 	if (state->index_file)
 		return read_index_from(state->repo->index, state->index_file,
-				       get_git_dir());
+				       get_git_dir(), state->repo);
 	else
 		return repo_read_index(state->repo);
 }
diff --git a/builtin/worktree.c b/builtin/worktree.c
index 6cc094a453..874adebd2c 100644
--- a/builtin/worktree.c
+++ b/builtin/worktree.c
@@ -737,7 +737,7 @@ static void validate_no_submodules(const struct worktree *wt)
 		 */
 		found_submodules = 1;
 	} else if (read_index_from(&istate, worktree_git_path(wt, "index"),
-				   get_worktree_git_dir(wt)) > 0) {
+				   get_worktree_git_dir(wt), the_repository) > 0) {
 		for (i = 0; i < istate.cache_nr; i++) {
 			struct cache_entry *ce = istate.cache[i];
 			int err;
diff --git a/cache-tree.c b/cache-tree.c
index b13bfaf71e..84f19b224e 100644
--- a/cache-tree.c
+++ b/cache-tree.c
@@ -616,7 +616,7 @@ int write_index_as_tree(struct object_id *oid, struct index_state *index_state,
 
 	hold_lock_file_for_update(&lock_file, index_path, LOCK_DIE_ON_ERROR);
 
-	entries = read_index_from(index_state, index_path, get_git_dir());
+	entries = read_index_from(index_state, index_path, get_git_dir(), the_repository);
 	if (entries < 0) {
 		ret = WRITE_TREE_UNREADABLE_INDEX;
 		goto out;
diff --git a/cache.h b/cache.h
index ac92421f3a..3850c82fc9 100644
--- a/cache.h
+++ b/cache.h
@@ -420,7 +420,7 @@ extern struct index_state the_index;
 #define active_cache_tree (the_index.cache_tree)
 
 #define read_cache() repo_read_index(the_repository)
-#define read_cache_from(path) read_index_from(&the_index, (path), (get_git_dir()))
+#define read_cache_from(path) read_index_from(&the_index, (path), (get_git_dir()), the_repository)
 #define read_cache_preload(pathspec) repo_read_index_preload(the_repository, (pathspec), 0)
 #define is_cache_unborn() is_index_unborn(&the_index)
 #define read_cache_unmerged() repo_read_index_unmerged(the_repository)
@@ -678,7 +678,7 @@ extern void preload_index(struct index_state *index,
 extern int do_read_index(struct index_state *istate, const char *path,
 			 int must_exist); /* for testting only! */
 extern int read_index_from(struct index_state *, const char *path,
-			   const char *gitdir);
+			   const char *gitdir, const struct repository *repo);
 extern int is_index_unborn(struct index_state *);
 
 /* For use with `write_locked_index()`. */
diff --git a/read-cache.c b/read-cache.c
index 4dc6de1b55..0444703284 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -2256,7 +2256,7 @@ static void freshen_shared_index(const char *shared_index, int warn)
 }
 
 int read_index_from(struct index_state *istate, const char *path,
-		    const char *gitdir)
+		    const char *gitdir, const struct repository *repo)
 {
 	struct split_index *split_index;
 	int ret;
@@ -2292,7 +2292,7 @@ int read_index_from(struct index_state *istate, const char *path,
 		split_index->base = xcalloc(1, sizeof(*split_index->base));
 
 	base_oid_hex = oid_to_hex(&split_index->base_oid);
-	base_path = xstrfmt("%s/sharedindex.%s", gitdir, base_oid_hex);
+	base_path = xstrfmt("%s/sharedindex.%s", repo->gitdir, base_oid_hex);
 	trace2_region_enter_printf("index", "shared/do_read_index",
 				   the_repository, "%s", base_path);
 	ret = do_read_index(split_index->base, base_path, 1);
diff --git a/repository.c b/repository.c
index 682c239fe3..8ac2b65f61 100644
--- a/repository.c
+++ b/repository.c
@@ -264,7 +264,7 @@ int repo_read_index(struct repository *repo)
 	if (!repo->index)
 		repo->index = xcalloc(1, sizeof(*repo->index));
 
-	return read_index_from(repo->index, repo->index_file, repo->gitdir);
+	return read_index_from(repo->index, repo->index_file, repo->gitdir, repo);
 }
 
 int repo_hold_locked_index(struct repository *repo,
diff --git a/revision.c b/revision.c
index eb8e51bc63..247a4d5704 100644
--- a/revision.c
+++ b/revision.c
@@ -1556,7 +1556,7 @@ void add_index_objects_to_pending(struct rev_info *revs, unsigned int flags)
 
 		if (read_index_from(&istate,
 				    worktree_git_path(wt, "index"),
-				    get_worktree_git_dir(wt)) > 0)
+				    get_worktree_git_dir(wt), the_repository) > 0)
 			do_add_index_objects_to_pending(revs, &istate, flags);
 		discard_index(&istate);
 	}
-- 
2.20.1