Function set_ref_status_for_push

remote.c:1664–1755

}

void set_ref_status_for_push(struct ref *remote_refs, int send_mirror,
			     int force_update)
{
	struct ref *ref;

	for (ref = remote_refs; ref; ref = ref->next) {
		int force_ref_update = ref->force || force_update;
		int reject_reason = 0;

		if (ref->peer_ref)
			oidcpy(&ref->new_oid, &ref->peer_ref->new_oid);
		else if (!send_mirror)
			continue;

		ref->deletion = is_null_oid(&ref->new_oid);
		if (!ref->deletion &&
			oideq(&ref->old_oid, &ref->new_oid)) {
			ref->status = REF_STATUS_UPTODATE;
			continue;
		}

		/*
		 * If the remote ref has moved and is now different
		 * from what we expect, reject any push.
		 *
		 * It also is an error if the user told us to check
		 * with the remote-tracking branch to find the value
		 * to expect, but we did not have such a tracking
		 * branch.
		 *
		 * If the tip of the remote-tracking ref is unreachable
		 * from any reflog entry of its local ref indicating a
		 * possible update since checkout; reject the push.
		 */
		if (ref->expect_old_sha1) {
			if (!oideq(&ref->old_oid, &ref->old_oid_expect))
				reject_reason = REF_STATUS_REJECT_STALE;
			else if (ref->check_reachable && ref->unreachable)
				reject_reason =
					REF_STATUS_REJECT_REMOTE_UPDATED;
			else
				/*
				 * If the ref isn't stale, and is reachable
				 * from one of the reflog entries of
				 * the local branch, force the update.
				 */
				force_ref_update = 1;
		}

		/*
		 * If the update isn't already rejected then check
		 * the usual "must fast-forward" rules.
		 *
		 * Decide whether an individual refspec A:B can be
		 * pushed.  The push will succeed if any of the
		 * following are true:
		 *
		 * (1) the remote reference B does not exist