path.c: move some code out of strbuf_git_path_submodule()

refs is learning to avoid path rewriting that is done by
strbuf_git_path_submodule(). Factor out this code so it could be reused
by refs_* functions.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/path.c b/path.c
index efcedafba6f2c0cae218f2d32425c13272df8dea..03e7e33b6e6986e625d08cd25e9a3be3922b7259 100644 (file)
--- a/path.c
+++ b/path.c
@@ -471,39 +471,19 @@ const char *worktree_git_path(const struct worktree *wt, const char *fmt, ...)
 }
 
 /* Returns 0 on success, negative on failure. */
-#define SUBMODULE_PATH_ERR_NOT_CONFIGURED -1
 static int do_submodule_path(struct strbuf *buf, const char *path,
                             const char *fmt, va_list args)
 {
-       const char *git_dir;
        struct strbuf git_submodule_common_dir = STRBUF_INIT;
        struct strbuf git_submodule_dir = STRBUF_INIT;
-       const struct submodule *sub;
-       int err = 0;
+       int ret;
 
-       strbuf_addstr(buf, path);
-       strbuf_complete(buf, '/');
-       strbuf_addstr(buf, ".git");
-
-       git_dir = read_gitfile(buf->buf);
-       if (git_dir) {
-               strbuf_reset(buf);
-               strbuf_addstr(buf, git_dir);
-       }
-       if (!is_git_directory(buf->buf)) {
-               gitmodules_config();
-               sub = submodule_from_path(null_sha1, path);
-               if (!sub) {
-                       err = SUBMODULE_PATH_ERR_NOT_CONFIGURED;
-                       goto cleanup;
-               }
-               strbuf_reset(buf);
-               strbuf_git_path(buf, "%s/%s", "modules", sub->name);
-       }
-
-       strbuf_addch(buf, '/');
-       strbuf_addbuf(&git_submodule_dir, buf);
+       ret = submodule_to_gitdir(&git_submodule_dir, path);
+       if (ret)
+               goto cleanup;
 
+       strbuf_complete(&git_submodule_dir, '/');
+       strbuf_addbuf(buf, &git_submodule_dir);
        strbuf_vaddf(buf, fmt, args);
 
        if (get_common_dir_noenv(&git_submodule_common_dir, git_submodule_dir.buf))
@@ -514,8 +494,7 @@ static int do_submodule_path(struct strbuf *buf, const char *path,
 cleanup:
        strbuf_release(&git_submodule_dir);
        strbuf_release(&git_submodule_common_dir);
-
-       return err;
+       return ret;
 }
 
 char *git_pathdup_submodule(const char *path, const char *fmt, ...)

diff --git a/submodule.c b/submodule.c
index 3200b7bb2b2360c7efab86b680ed5d0cafa5e9d3..a31f68812c598e8a29048022f36cc60c2ebd415d 100644 (file)
--- a/submodule.c
+++ b/submodule.c
@@ -1596,3 +1596,34 @@ const char *get_superproject_working_tree(void)
 
        return ret;
 }
+
+int submodule_to_gitdir(struct strbuf *buf, const char *submodule)
+{
+       const struct submodule *sub;
+       const char *git_dir;
+       int ret = 0;
+
+       strbuf_reset(buf);
+       strbuf_addstr(buf, submodule);
+       strbuf_complete(buf, '/');
+       strbuf_addstr(buf, ".git");
+
+       git_dir = read_gitfile(buf->buf);
+       if (git_dir) {
+               strbuf_reset(buf);
+               strbuf_addstr(buf, git_dir);
+       }
+       if (!is_git_directory(buf->buf)) {
+               gitmodules_config();
+               sub = submodule_from_path(null_sha1, submodule);
+               if (!sub) {
+                       ret = -1;
+                       goto cleanup;
+               }
+               strbuf_reset(buf);
+               strbuf_git_path(buf, "%s/%s", "modules", sub->name);
+       }
+
+cleanup:
+       return ret;
+}

diff --git a/submodule.h b/submodule.h
index c8a0c9cb2971219b807f7fe931c4dc5355b978ea..fce2fb64d2c6100903d9c1ce1c746a36de08d36c 100644 (file)
--- a/submodule.h
+++ b/submodule.h
@@ -81,6 +81,12 @@ extern int push_unpushed_submodules(struct sha1_array *commits,
                                    int dry_run);
 extern void connect_work_tree_and_git_dir(const char *work_tree, const char *git_dir);
 extern int parallel_submodules(void);
+/*
+ * Given a submodule path (as in the index), return the repository
+ * 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);
 
 /*
  * Prepare the "env_array" parameter of a "struct child_process" for executing