http-push: store refspecs in a struct refspec

Convert http-push.c to store refspecs in a 'struct refspec' instead of
in an array of 'const char *'.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

http-push.c

@@ -1692,8 +1692,7 @@ int cmd_main(int argc, const char **argv)
 {
 	struct transfer_request *request;
 	struct transfer_request *next_request;
-	int nr_refspec = 0;
-	const char **refspec = NULL;
+	struct refspec rs = REFSPEC_INIT_PUSH;
 	struct remote_lock *ref_lock = NULL;
 	struct remote_lock *info_ref_lock = NULL;
 	struct rev_info revs;
@@ -1756,8 +1755,7 @@ int cmd_main(int argc, const char **argv)
 			}
 			continue;
 		}
-		refspec = argv;
-		nr_refspec = argc - i;
+		refspec_appendn(&rs, argv, argc - i);
 		break;
 	}
 
@@ -1768,7 +1766,7 @@ int cmd_main(int argc, const char **argv)
 	if (!repo->url)
 		usage(http_push_usage);
 
-	if (delete_branch && nr_refspec != 1)
+	if (delete_branch && rs.nr != 1)
 		die("You must specify only one branch name when deleting a remote branch");
 
 	setup_git_directory();
@@ -1814,18 +1812,19 @@ int cmd_main(int argc, const char **argv)
 
 	/* Remove a remote branch if -d or -D was specified */
 	if (delete_branch) {
-		if (delete_remote_branch(refspec[0], force_delete) == -1) {
+		const char *branch = rs.items[i].src;
+		if (delete_remote_branch(branch, force_delete) == -1) {
 			fprintf(stderr, "Unable to delete remote branch %s\n",
-				refspec[0]);
+				branch);
 			if (helper_status)
-				printf("error %s cannot remove\n", refspec[0]);
+				printf("error %s cannot remove\n", branch);
 		}
 		goto cleanup;
 	}
 
 	/* match them up */
 	if (match_push_refs(local_refs, &remote_refs,
-			    nr_refspec, (const char **) refspec, push_all)) {
+			    rs.raw_nr, rs.raw, push_all)) {
 		rc = -1;
 		goto cleanup;
 	}