Function write_rev_file_order

pack-write.c:246–300

}

char *write_rev_file_order(struct repository *repo,
			   const char *rev_name,
			   uint32_t *pack_order,
			   uint32_t nr_objects,
			   const unsigned char *hash,
			   unsigned flags)
{
	struct hashfile *f;
	char *path;
	int fd;

	if ((flags & WRITE_REV) && (flags & WRITE_REV_VERIFY))
		die(_("cannot both write and verify reverse index"));

	if (flags & WRITE_REV) {
		if (!rev_name) {
			struct strbuf tmp_file = STRBUF_INIT;
			fd = odb_mkstemp(repo->objects, &tmp_file,
					 "pack/tmp_rev_XXXXXX");
			path = strbuf_detach(&tmp_file, NULL);
		} else {
			unlink(rev_name);
			fd = xopen(rev_name, O_CREAT|O_EXCL|O_WRONLY, 0600);
			path = xstrdup(rev_name);
		}
		f = hashfd(repo->hash_algo, fd, path);
	} else if (flags & WRITE_REV_VERIFY) {
		struct stat statbuf;
		if (stat(rev_name, &statbuf)) {
			if (errno == ENOENT) {
				/* .rev files are optional */
				return NULL;
			} else
				die_errno(_("could not stat: %s"), rev_name);
		}
		f = hashfd_check(repo->hash_algo, rev_name);
		path = xstrdup(rev_name);
	} else {
		return NULL;
	}

	write_rev_header(repo->hash_algo, f);

	write_rev_index_positions(f, pack_order, nr_objects);
	write_rev_trailer(repo->hash_algo, f, hash);

	if (adjust_shared_perm(repo, path) < 0)
		die(_("failed to make %s readable"), path);

	finalize_hashfile(f, NULL, FSYNC_COMPONENT_PACK_METADATA,
			  CSUM_HASH_IN_STREAM | CSUM_CLOSE |
			  ((flags & WRITE_IDX_VERIFY) ? 0 : CSUM_FSYNC));

	return path;
}

static void write_mtimes_header(const struct git_hash_algo *hash_algo,
				struct hashfile *f)