Function relocate_single_git_dir_into_superproject

submodule.c:2487–2527

* Embeds a single submodules git directory into the superprojects git dir, * non recursively. */

 * non recursively.
 */
static void relocate_single_git_dir_into_superproject(const char *path,
						      const char *super_prefix)
{
	char *old_git_dir = NULL, *real_old_git_dir = NULL, *real_new_git_dir = NULL;
	struct strbuf new_gitdir = STRBUF_INIT;
	const struct submodule *sub;

	if (validate_submodule_path(path) < 0)
		exit(128);

	if (submodule_uses_worktrees(path))
		die(_("relocate_gitdir for submodule '%s' with "
		      "more than one worktree not supported"), path);

	old_git_dir = xstrfmt("%s/.git", path);
	if (read_gitfile(old_git_dir))
		/* If it is an actual gitfile, it doesn't need migration. */
		return;

	real_old_git_dir = real_pathdup(old_git_dir, 1);

	sub = submodule_from_path(the_repository, null_oid(the_hash_algo), path);
	if (!sub)
		die(_("could not lookup name for submodule '%s'"), path);

	submodule_name_to_gitdir(&new_gitdir, the_repository, sub->name);
	if (safe_create_leading_directories_const(the_repository, new_gitdir.buf) < 0)
		die(_("could not create directory '%s'"), new_gitdir.buf);
	real_new_git_dir = real_pathdup(new_gitdir.buf, 1);

	fprintf(stderr, _("Migrating git directory of '%s%s' from\n'%s' to\n'%s'\n"),
		super_prefix ? super_prefix : "", path,
		real_old_git_dir, real_new_git_dir);

	relocate_gitdir(path, real_old_git_dir, real_new_git_dir);

	free(old_git_dir);
	free(real_old_git_dir);
	free(real_new_git_dir);
	strbuf_release(&new_gitdir);
}

static void absorb_git_dir_into_superproject_recurse(const char *path,
						     const char *super_prefix)