Function parse_head

sequencer.c:1497–1518

}

static int parse_head(struct repository *r, struct commit **head)
{
	struct commit *current_head;
	struct object_id oid;

	if (repo_get_oid(r, "HEAD", &oid)) {
		current_head = NULL;
	} else {
		current_head = lookup_commit_reference(r, &oid);
		if (!current_head)
			return error(_("could not parse HEAD"));
		if (!oideq(&oid, &current_head->object.oid)) {
			warning(_("HEAD %s is not a commit!"),
				oid_to_hex(&oid));
		}
		if (repo_parse_commit(r, current_head))
			return error(_("could not parse HEAD commit"));
	}
	*head = current_head;

	return 0;
}

/*
 * Try to commit without forking 'git commit'. In some cases we need