+static int push_refs(struct transport *transport,
+ struct ref *remote_refs, int flags)
+{
+ int force_all = flags & TRANSPORT_PUSH_FORCE;
+ int mirror = flags & TRANSPORT_PUSH_MIRROR;
+ struct helper_data *data = transport->data;
+ struct strbuf buf = STRBUF_INIT;
+ struct child_process *helper;
+ struct ref *ref;
+
+ if (!remote_refs)
+ return 0;
+
+ helper = get_helper(transport);
+ if (!data->push)
+ return 1;
+
+ for (ref = remote_refs; ref; ref = ref->next) {
+ if (ref->peer_ref)
+ hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
+ else if (!mirror)
+ continue;
+
+ ref->deletion = is_null_sha1(ref->new_sha1);
+ if (!ref->deletion &&
+ !hashcmp(ref->old_sha1, ref->new_sha1)) {
+ ref->status = REF_STATUS_UPTODATE;
+ continue;
+ }
+
+ if (force_all)
+ ref->force = 1;
+
+ strbuf_addstr(&buf, "push ");
+ if (!ref->deletion) {
+ if (ref->force)
+ strbuf_addch(&buf, '+');
+ if (ref->peer_ref)
+ strbuf_addstr(&buf, ref->peer_ref->name);
+ else
+ strbuf_addstr(&buf, sha1_to_hex(ref->new_sha1));
+ }
+ strbuf_addch(&buf, ':');
+ strbuf_addstr(&buf, ref->name);
+ strbuf_addch(&buf, '\n');
+ }
+
+ transport->verbose = flags & TRANSPORT_PUSH_VERBOSE ? 1 : 0;
+ standard_options(transport);
+
+ if (flags & TRANSPORT_PUSH_DRY_RUN) {
+ if (set_helper_option(transport, "dry-run", "true") != 0)
+ die("helper %s does not support dry-run", data->name);
+ }
+
+ strbuf_addch(&buf, '\n');
+ if (write_in_full(helper->in, buf.buf, buf.len) != buf.len)
+ exit(128);
+
+ ref = remote_refs;
+ while (1) {
+ char *refname, *msg;
+ int status;
+
+ strbuf_reset(&buf);
+ if (strbuf_getline(&buf, data->out, '\n') == EOF)
+ exit(128); /* child died, message supplied already */
+ if (!buf.len)
+ break;
+
+ if (!prefixcmp(buf.buf, "ok ")) {
+ status = REF_STATUS_OK;
+ refname = buf.buf + 3;
+ } else if (!prefixcmp(buf.buf, "error ")) {
+ status = REF_STATUS_REMOTE_REJECT;
+ refname = buf.buf + 6;
+ } else
+ die("expected ok/error, helper said '%s'\n", buf.buf);
+
+ msg = strchr(refname, ' ');
+ if (msg) {
+ struct strbuf msg_buf = STRBUF_INIT;
+ const char *end;
+
+ *msg++ = '\0';
+ if (!unquote_c_style(&msg_buf, msg, &end))
+ msg = strbuf_detach(&msg_buf, NULL);
+ else
+ msg = xstrdup(msg);
+ strbuf_release(&msg_buf);
+
+ if (!strcmp(msg, "no match")) {
+ status = REF_STATUS_NONE;
+ free(msg);
+ msg = NULL;
+ }
+ else if (!strcmp(msg, "up to date")) {
+ status = REF_STATUS_UPTODATE;
+ free(msg);
+ msg = NULL;
+ }
+ else if (!strcmp(msg, "non-fast forward")) {
+ status = REF_STATUS_REJECT_NONFASTFORWARD;
+ free(msg);
+ msg = NULL;
+ }
+ }
+
+ if (ref)
+ ref = find_ref_by_name(ref, refname);
+ if (!ref)
+ ref = find_ref_by_name(remote_refs, refname);
+ if (!ref) {
+ warning("helper reported unexpected status of %s", refname);
+ continue;
+ }
+
+ ref->status = status;
+ ref->remote_status = msg;
+ }
+ strbuf_release(&buf);
+ return 0;
+}
+