From 48ca954737890ff4661fbf88a8d90102bc85a1ec Mon Sep 17 00:00:00 2001
From: Colin Watson <cjwatson@debian.org>
Date: Thu, 13 Aug 2009 09:03:34 +0100
Subject: [PATCH] dh: Add --list option to list available addons.

---
 debian/changelog |  6 ++++++
 dh               | 32 +++++++++++++++++++++++++++++++-
 2 files changed, 37 insertions(+), 1 deletion(-)

diff --git a/debian/changelog b/debian/changelog
index cf1bcd3..7df41d4 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+debhelper (7.3.14) UNRELEASED; urgency=low
+
+  * dh: Add --list option to list available addons.
+
+ -- Colin Watson <cjwatson@debian.org>  Thu, 13 Aug 2009 09:00:24 +0100
+
 debhelper (7.3.13) unstable; urgency=low
 
   [ Bernd Zeimetz ]
diff --git a/dh b/dh
index 2a6c0a3..2e7385f 100755
--- a/dh
+++ b/dh
@@ -8,10 +8,11 @@ dh - debhelper command sequencer
 
 use strict;
 use Debian::Debhelper::Dh_Lib;
+use File::Spec;
 
 =head1 SYNOPSIS
 
-B<dh> sequence [B<--with> I<addon>[,I<addon>,...]] [B<--until> I<cmd>] [B<--before> I<cmd>] [B<--after> I<cmd>] [B<--remaining>] [S<I<debhelper options>>]
+B<dh> sequence [B<--with> I<addon>[,I<addon>,...]] [B<--list>] [B<--until> I<cmd>] [B<--before> I<cmd>] [B<--after> I<cmd>] [B<--remaining>] [S<I<debhelper options>>]
 
 =head1 DESCRIPTION
 
@@ -58,6 +59,10 @@ the sequence addon interface.
 
 The inverse of --with, disables using the given addon.
 
+=item B<--list>, B<-l>
+
+List all available addons.
+
 =item B<--until> I<cmd>
 
 Run commands in the sequence until and including I<cmd>, then stop.
@@ -216,6 +221,8 @@ init(options => {
 		my ($option,$value)=@_;
 		@{$dh{WITH}} = grep { $_ ne $value } @{$dh{WITH}};
 	},
+	"l" => \$dh{LIST},
+	"list" => \$dh{LIST},
 });
 inhibit_log();
 
@@ -327,6 +334,29 @@ sub add_command {
 	my $sequence=shift;
 	unshift @{$sequences{$sequence}}, $command;
 }
+
+if ($dh{LIST}) {
+	my %addons;
+
+	for my $inc (@INC) {
+		my $path = File::Spec->catdir($inc, "Debian/Debhelper/Sequence");
+		if (-d $path) {
+			for my $module_path (glob "$path/*.pm") {
+				my $name = basename($module_path);
+				$name =~ s/\.pm$//;
+				$name =~ s/_/-/g;
+				$addons{$name} = 1;
+			}
+		}
+	}
+
+	for my $name (sort keys %addons) {
+		print "$name\n";
+	}
+
+	exit 0;
+}
+
 foreach my $addon (@{$dh{WITH}}) {
 	my $mod="Debian::Debhelper::Sequence::$addon";
 	$mod=~s/-/_/g;
-- 
2.39.2