[PATCH] git-remote: make remote name optional for prune operation

@@ -15,7 +15,7 @@ SYNOPSIS
 'git remote rm' <name>
 'git remote set-head' <name> [-a | -d | <branch>]
 'git remote show' [-n] <name>
-'git remote prune' [-n | --dry-run] <name>
+'git remote prune' [-n | --dry-run] [name]
 'git remote update' [-p | --prune] [group | remote]...
 
 DESCRIPTION

@@ -116,6 +116,8 @@ referenced by <name>, but are still locally available in
 +
 With `--dry-run` option, report what branches will be pruned, but do no
 actually prune them.
+If <name> is not set, all stale branches from all remote repositories will
+be deleted.
 
 'update'::
 

@@ -14,7 +14,7 @@ static const char * const builtin_remote_usage[] = {
 	"git remote rm <name>",
 	"git remote set-head <name> [-a | -d | <branch>]",
 	"git remote show [-n] <name>",
-	"git remote prune [-n | --dry-run] <name>",
+	"git remote prune [-n | --dry-run] [name]",
 	"git remote [-v | --verbose] update [-p | --prune] [group]",
 	NULL
 };

@@ -25,6 +25,7 @@ static const char * const builtin_remote_usage[] = {
 
 static int verbose;
 
+static int get_one_entry(struct remote *remote, void *priv);
 static int show_all(void);
 static int prune_remote(const char *remote, int dry_run);
 

@@ -1133,10 +1134,25 @@ static int prune(int argc, const char **argv)
 	argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
 
 	if (argc < 1)
-		usage_with_options(builtin_remote_usage, options);
+	{
+		struct string_list list = { NULL, 0, 0 };
+		int result = for_each_remote(get_one_entry, &list);
+
+		if (!result) {
+			int i;
 
-	for (; argc; argc--, argv++)
-		result |= prune_remote(*argv, dry_run);
+			sort_string_list(&list);
+			for (i = 0; i < list.nr; i++) {
+				struct string_list_item *item = list.items + i;
+				if (i && !strcmp((item - 1)->string, item->string))
+				       continue;
+				result |= prune_remote(item->string, dry_run);
+			}
+		}
+	}
+	else
+		for (; argc; argc--, argv++)
+			result |= prune_remote(*argv, dry_run);
 
 	return result;
 }

@@ -223,6 +223,27 @@ test_expect_success 'prune' '
 	 test_must_fail git rev-parse refs/remotes/origin/side)
 '
 
+test_expect_success 'prune-all' '
+	(cd one &&
+	 git branch side3 side2) &&
+        (cd test &&
+         git fetch origin) &&
+        (cd one &&
+         git branch -D side3) &&
+        (cd two &&
+         git branch side2 side) &&
+        (cd test &&
+         git fetch two) &&
+        (cd two &&
+         git branch -D side2) &&
+	(cd test &&
+	 git fetch origin &&
+         git fetch two &&
+	 git remote prune &&
+	 test_must_fail git rev-parse refs/remotes/origin/side3 &&
+	 test_must_fail git rev-parse refs/remotes/two/side2)
+'
+
 test_expect_success 'set-head --delete' '
 	(cd test &&
 	 git symbolic-ref refs/remotes/origin/HEAD &&