submodule: refactor submodule_to_gitdir() to accept a repo

The `submodule_to_gitdir()` function implicitly uses `the_repository` to
resolve submodule paths. Refactor the function to instead accept a repo
as parameter to remove the dependency on global state.

Signed-off-by: Patrick Steinhardt <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: pks-t

builtin/submodule--helper.c

@@ -1301,7 +1301,7 @@ static void sync_submodule(const char *path, const char *prefix,
 	remote_key = xstrfmt("remote.%s.url", default_remote);
 	free(default_remote);
 
-	submodule_to_gitdir(&sb, path);
+	submodule_to_gitdir(the_repository, &sb, path);
 	strbuf_addstr(&sb, "/config");
 
 	if (git_config_set_in_file_gently(sb.buf, remote_key, NULL, sub_origin_url))

path.c

@@ -567,7 +567,7 @@ static int do_submodule_path(struct strbuf *buf, const char *path,
 	struct strbuf git_submodule_dir = STRBUF_INIT;
 	int ret;
 
-	ret = submodule_to_gitdir(&git_submodule_dir, path);
+	ret = submodule_to_gitdir(the_repository, &git_submodule_dir, path);
 	if (ret)
 		goto cleanup;
 

refs.c

@@ -2146,7 +2146,7 @@ struct ref_store *repo_get_submodule_ref_store(struct repository *repo,
 	if (!is_nonbare_repository_dir(&submodule_sb))
 		goto done;
 
-	if (submodule_to_gitdir(&submodule_sb, submodule))
+	if (submodule_to_gitdir(repo, &submodule_sb, submodule))
 		goto done;
 
 	subrepo = xmalloc(sizeof(*subrepo));

submodule.c

@@ -536,7 +536,8 @@ static struct repository *open_submodule(const char *path)
 	struct strbuf sb = STRBUF_INIT;
 	struct repository *out = xmalloc(sizeof(*out));
 
-	if (submodule_to_gitdir(&sb, path) || repo_init(out, sb.buf, NULL)) {
+	if (submodule_to_gitdir(the_repository, &sb, path) ||
+	    repo_init(out, sb.buf, NULL)) {
 		strbuf_release(&sb);
 		free(out);
 		return NULL;
@@ -2572,7 +2573,8 @@ int get_superproject_working_tree(struct strbuf *buf)
  * Put the gitdir for a submodule (given relative to the main
  * repository worktree) into `buf`, or return -1 on error.
  */
-int submodule_to_gitdir(struct strbuf *buf, const char *submodule)
+int submodule_to_gitdir(struct repository *repo,
+			struct strbuf *buf, const char *submodule)
 {
 	const struct submodule *sub;
 	const char *git_dir;
@@ -2592,14 +2594,13 @@ int submodule_to_gitdir(struct strbuf *buf, const char *submodule)
 		strbuf_addstr(buf, git_dir);
 	}
 	if (!is_git_directory(buf->buf)) {
-		sub = submodule_from_path(the_repository, null_oid(),
-					  submodule);
+		sub = submodule_from_path(repo, null_oid(), submodule);
 		if (!sub) {
 			ret = -1;
 			goto cleanup;
 		}
 		strbuf_reset(buf);
-		submodule_name_to_gitdir(buf, the_repository, sub->name);
+		submodule_name_to_gitdir(buf, repo, sub->name);
 	}
 
 cleanup:

submodule.h

@@ -136,7 +136,8 @@ int push_unpushed_submodules(struct repository *r,
  * path of that submodule in 'buf'. Return -1 on error or when the
  * submodule is not initialized.
  */
-int submodule_to_gitdir(struct strbuf *buf, const char *submodule);
+int submodule_to_gitdir(struct repository *repo,
+			struct strbuf *buf, const char *submodule);
 
 /*
  * Given a submodule name, create a path to where the submodule's gitdir lives