Function runcommand_in_submodule_cb

builtin/submodule--helper.c:324–430

#define FOREACH_CB_INIT { 0 }

static void runcommand_in_submodule_cb(const struct cache_entry *list_item,
				       void *cb_data)
{
	struct foreach_cb *info = cb_data;
	const char *path = list_item->name;
	const struct object_id *ce_oid = &list_item->oid;
	const struct submodule *sub;
	struct child_process cp = CHILD_PROCESS_INIT;
	char *displaypath;

	if (validate_submodule_path(path) < 0)
		die(NULL);

	displaypath = get_submodule_displaypath(path, info->prefix,
						info->super_prefix);

	sub = submodule_from_path(the_repository, null_oid(the_hash_algo), path);

	if (!sub)
		die(_("No url found for submodule path '%s' in .gitmodules"),
			displaypath);

	if (!is_submodule_populated_gently(path, NULL))
		goto cleanup;

	prepare_submodule_repo_env(&cp.env);

	/*
	 * For the purpose of executing <command> in the submodule,
	 * separate shell is used for the purpose of running the
	 * child process.
	 */
	cp.use_shell = 1;
	cp.dir = path;

	/*
	 * NEEDSWORK: the command currently has access to the variables $name,
	 * $sm_path, $displaypath, $sha1 and $toplevel only when the command
	 * contains a single argument. This is done for maintaining a faithful
	 * translation from shell script.
	 */
	if (info->argc == 1) {
		char *toplevel = xgetcwd();
		struct strbuf sb = STRBUF_INIT;

		strvec_pushf(&cp.env, "name=%s", sub->name);
		strvec_pushf(&cp.env, "sm_path=%s", path);
		strvec_pushf(&cp.env, "displaypath=%s", displaypath);
		strvec_pushf(&cp.env, "sha1=%s",
			     oid_to_hex(ce_oid));
		strvec_pushf(&cp.env, "toplevel=%s", toplevel);

		/*
		 * Since the path variable was accessible from the script
		 * before porting, it is also made available after porting.
		 * The environment variable "PATH" has a very special purpose
		 * on windows. And since environment variables are
		 * case-insensitive in windows, it interferes with the