Function prune_shallow

shallow.c:485–515

* mark_reachable_objects() should have been run prior to this and all * reachable commits marked as "SEEN", except when quick_prune is non-zero, * in which case lines are excised from the shallow file if they refer to * commits that do not exist (any longer). */

 * commits that do not exist (any longer).
 */
void prune_shallow(unsigned options)
{
	struct shallow_lock shallow_lock = SHALLOW_LOCK_INIT;
	struct strbuf sb = STRBUF_INIT;
	unsigned flags = SEEN_ONLY;
	int fd;

	if (options & PRUNE_QUICK)
		flags |= QUICK;

	if (options & PRUNE_SHOW_ONLY) {
		flags |= VERBOSE;
		write_shallow_commits_1(&sb, 0, NULL, flags);
		strbuf_release(&sb);
		return;
	}
	fd = hold_lock_file_for_update(&shallow_lock.lock,
				       git_path_shallow(the_repository),
				       LOCK_DIE_ON_ERROR);
	check_shallow_file_for_update(the_repository);
	if (write_shallow_commits_1(&sb, 0, NULL, flags)) {
		if (write_in_full(fd, sb.buf, sb.len) < 0)
			die_errno("failed to write to %s",
				  get_lock_file_path(&shallow_lock.lock));
		commit_shallow_file(the_repository, &shallow_lock);
	} else {
		unlink(git_path_shallow(the_repository));
		rollback_shallow_file(the_repository, &shallow_lock);
	}
	strbuf_release(&sb);
}

struct trace_key trace_shallow = TRACE_KEY_INIT(SHALLOW);