Function module_migrate

builtin/submodule--helper.c:1362–1420

}

static int module_migrate(int argc UNUSED, const char **argv UNUSED,
			  const char *prefix UNUSED, struct repository *repo)
{
	struct strbuf module_dir = STRBUF_INIT;
	DIR *dir;
	struct dirent *de;
	int repo_version = 0;

	repo_git_path_append(repo, &module_dir, "modules/");

	dir = opendir(module_dir.buf);
	if (!dir)
		die(_("could not open '%s'"), module_dir.buf);

	while ((de = readdir(dir))) {
		struct strbuf gitdir_path = STRBUF_INIT;
		char *key;
		const char *value;

		if (is_dot_or_dotdot(de->d_name))
			continue;

		strbuf_addf(&gitdir_path, "%s/%s", module_dir.buf, de->d_name);
		if (!is_git_directory(gitdir_path.buf)) {
			strbuf_release(&gitdir_path);
			continue;
		}
		strbuf_release(&gitdir_path);

		key = xstrfmt("submodule.%s.gitdir", de->d_name);
		if (!repo_config_get_string_tmp(repo, key, &value)) {
			/* Already has a gitdir config, nothing to do. */
			free(key);
			continue;
		}
		free(key);

		create_default_gitdir_config(de->d_name);
	}

	closedir(dir);
	strbuf_release(&module_dir);

	repo_config_get_int(the_repository, "core.repositoryformatversion", &repo_version);
	if (repo_version == 0 &&
	    repo_config_set_gently(repo, "core.repositoryformatversion", "1"))
		die(_("could not set core.repositoryformatversion to 1.\n"
		      "Please set it for migration to work, for example:\n"
		      "git config core.repositoryformatversion 1"));

	if (repo_config_set_gently(repo, "extensions.submodulePathConfig", "true"))
		die(_("could not enable submodulePathConfig extension. It is required\n"
		      "for migration to work. Please enable it in the root repo:\n"
		      "git config extensions.submodulePathConfig true"));

	repo->repository_format_submodule_path_cfg = 1;

	return 0;