doc/SubmittingPatches: show how to get a CLI commit summary

diff --git a/submodule.c b/submodule.c
index 4c4f033e8a0f9f23e759949209c323875cd119fc..0a2831d846d27e694ada4bc557a7d54a8bf2d8df 100644 (file)
--- a/submodule.c
+++ b/submodule.c
@@ -1403,7 +1403,7 @@ static void relocate_single_git_dir_into_superproject(const char *prefix,
                /* If it is an actual gitfile, it doesn't need migration. */
                return;
 
-       real_old_git_dir = real_pathdup(old_git_dir);
+       real_old_git_dir = real_pathdup(old_git_dir, 1);
 
        sub = submodule_from_path(null_sha1, path);
        if (!sub)
@@ -1412,7 +1412,7 @@ static void relocate_single_git_dir_into_superproject(const char *prefix,
        new_git_dir = git_path("modules/%s", sub->name);
        if (safe_create_leading_directories_const(new_git_dir) < 0)
                die(_("could not create directory '%s'"), new_git_dir);
-       real_new_git_dir = real_pathdup(new_git_dir);
+       real_new_git_dir = real_pathdup(new_git_dir, 1);
 
        if (!prefix)
                prefix = get_super_prefix();
@@ -1437,22 +1437,57 @@ void absorb_git_dir_into_superproject(const char *prefix,
                                      const char *path,
                                      unsigned flags)
 {
-       const char *sub_git_dir, *v;
-       char *real_sub_git_dir = NULL, *real_common_git_dir = NULL;
+       int err_code;
+       const char *sub_git_dir;
        struct strbuf gitdir = STRBUF_INIT;
-
        strbuf_addf(&gitdir, "%s/.git", path);
-       sub_git_dir = resolve_gitdir(gitdir.buf);
+       sub_git_dir = resolve_gitdir_gently(gitdir.buf, &err_code);
 
        /* Not populated? */
-       if (!sub_git_dir)
-               goto out;
+       if (!sub_git_dir) {
+               char *real_new_git_dir;
+               const char *new_git_dir;
+               const struct submodule *sub;
+
+               if (err_code == READ_GITFILE_ERR_STAT_FAILED) {
+                       /* unpopulated as expected */
+                       strbuf_release(&gitdir);
+                       return;
+               }
+
+               if (err_code != READ_GITFILE_ERR_NOT_A_REPO)
+                       /* We don't know what broke here. */
+                       read_gitfile_error_die(err_code, path, NULL);
+
+               /*
+               * Maybe populated, but no git directory was found?
+               * This can happen if the superproject is a submodule
+               * itself and was just absorbed. The absorption of the
+               * superproject did not rewrite the git file links yet,
+               * fix it now.
+               */
+               sub = submodule_from_path(null_sha1, path);
+               if (!sub)
+                       die(_("could not lookup name for submodule '%s'"), path);
+               new_git_dir = git_path("modules/%s", sub->name);
+               if (safe_create_leading_directories_const(new_git_dir) < 0)
+                       die(_("could not create directory '%s'"), new_git_dir);
+               real_new_git_dir = real_pathdup(new_git_dir, 1);
+               connect_work_tree_and_git_dir(path, real_new_git_dir);
+
+               free(real_new_git_dir);
+       } else {
+               /* Is it already absorbed into the superprojects git dir? */
+               char *real_sub_git_dir = real_pathdup(sub_git_dir, 1);
+               char *real_common_git_dir = real_pathdup(get_git_common_dir(), 1);
 
-       /* Is it already absorbed into the superprojects git dir? */
-       real_sub_git_dir = real_pathdup(sub_git_dir);
-       real_common_git_dir = real_pathdup(get_git_common_dir());
-       if (!skip_prefix(real_sub_git_dir, real_common_git_dir, &v))
-               relocate_single_git_dir_into_superproject(prefix, path);
+               if (!starts_with(real_sub_git_dir, real_common_git_dir))
+                       relocate_single_git_dir_into_superproject(prefix, path);
+
+               free(real_sub_git_dir);
+               free(real_common_git_dir);
+       }
+       strbuf_release(&gitdir);
 
        if (flags & ABSORB_GITDIR_RECURSE_SUBMODULES) {
                struct child_process cp = CHILD_PROCESS_INIT;
@@ -1478,9 +1513,4 @@ void absorb_git_dir_into_superproject(const char *prefix,
 
                strbuf_release(&sb);
        }
-
-out:
-       strbuf_release(&gitdir);
-       free(real_sub_git_dir);
-       free(real_common_git_dir);
 }