Re: [PATCH v2 3/4] builtin/stash: provide a way to export stashes to a ref

> +static int do_export_stash(const char *ref, size_t argc, const char **argv)
> +{
> +	struct object_id base;
> +	struct object_context unused;
> +	struct commit *prev;
> +	struct object_id *items = NULL;
> +	int nitems = 0, nalloc = 0;
> +	int res = 0;
> +	struct strbuf revision;
> +	const char *author, *committer;
> +
> +	/*
> +	 * This is an arbitrary, fixed date, specifically the one used by git
> +	 * format-patch.  The goal is merely to produce reproducible output.
> +	 */
> +	prepare_fallback_ident("git stash", "git@stash");
> +	author = fmt_ident("git stash", "git@stash", WANT_BLANK_IDENT, "2001-09-17T00:00:00Z", 0);
> +	committer = fmt_ident("git stash", "git@stash", WANT_BLANK_IDENT, "2001-09-17T00:00:00Z", 0);
> +
> +	/* First, we create a single empty commit. */
> +	if (commit_tree_extended(NULL, 0, the_hash_algo->empty_tree, NULL, &base, author, committer, NULL, NULL))
> +		return error(_("unable to write base commit"));
> +
> +	prev = lookup_commit_reference(the_repository, &base);
> +
> +	if (argc) {
> +		/*
> +		 * Find each specified stash, and load data into the array.
> +		 */
> +		for (int i = 0; i < argc; i++) {
> +			ALLOC_GROW_BY(items, nitems, 1, nalloc);