[PATCH/RFC] remote: support --all for the prune-subcommand

[Erik Faye-Lund <kusmabite@gmail.com>]

While we're at it, wrap a long line to fit on a 80 char terminal.

Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com>
---

I recently needed to prune remote branches in a repo with a lot
of remotes, and to my surprise "git remote prune" didn't support
the --all option. So I added it. Perhaps this is useful for other
people as well?

 Documentation/git-remote.txt |    2 +-
 builtin/remote.c             |   27 ++++++++++++++++++++-------
 2 files changed, 21 insertions(+), 8 deletions(-)

diff --git a/Documentation/git-remote.txt b/Documentation/git-remote.txt
index 5a8c506..856cc7f 100644
--- a/Documentation/git-remote.txt
+++ b/Documentation/git-remote.txt
@@ -19,7 +19,7 @@ SYNOPSIS
 'git remote set-url --add' [--push] <name> <newurl>
 'git remote set-url --delete' [--push] <name> <url>
 'git remote' [-v | --verbose] 'show' [-n] <name>
-'git remote prune' [-n | --dry-run] <name>
+'git remote prune' [-n | --dry-run] (--all | <name>...)
 'git remote' [-v | --verbose] 'update' [-p | --prune] [(<group> | <remote>)...]
 
 DESCRIPTION
diff --git a/builtin/remote.c b/builtin/remote.c
index f2a9c26..2e8407d 100644
--- a/builtin/remote.c
+++ b/builtin/remote.c
@@ -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 [-v | --verbose] show [-n] <name>",
-	"git remote prune [-n | --dry-run] <name>",
+	"git remote prune [-n | --dry-run] (--all | <name>)",
 	"git remote [-v | --verbose] update [-p | --prune] [(<group> | <remote>)...]",
 	"git remote set-branches <name> [--add] <branch>...",
 	"git remote set-url <name> <newurl> [<oldurl>]",
@@ -1222,22 +1222,35 @@ static int set_head(int argc, const char **argv)
 	return result;
 }
 
+static int add_one_remote(struct remote *remote, void *remotes)
+{
+	string_list_append(remotes, remote->name);
+	return 0;
+}
+
 static int prune(int argc, const char **argv)
 {
-	int dry_run = 0, result = 0;
+	struct string_list remotes = STRING_LIST_INIT_NODUP;
+	int dry_run = 0, result = 0, all = 0, i;
 	struct option options[] = {
+		OPT_BOOLEAN(0, "all", &all, "prune all remotes"),
 		OPT__DRY_RUN(&dry_run, "dry run"),
 		OPT_END()
 	};
 
-	argc = parse_options(argc, argv, NULL, options, builtin_remote_prune_usage,
-			     0);
+	argc = parse_options(argc, argv, NULL, options,
+	                     builtin_remote_prune_usage, 0);
 
-	if (argc < 1)
+	if (all)
+		for_each_remote(add_one_remote, &remotes);
+	else if (argc < 1)
 		usage_with_options(builtin_remote_prune_usage, options);
+	else
+		for (; argc; argc--, argv++)
+			string_list_append(&remotes, *argv);
 
-	for (; argc; argc--, argv++)
-		result |= prune_remote(*argv, dry_run);
+	for (i = 0; i < remotes.nr; ++i)
+		result |= prune_remote(remotes.items[i].string, dry_run);
 
 	return result;
 }
-- 
1.7.6.msysgit.0.579.ga3d6f