From f41bb0f6d97cb0d00c627e79d42128ccd661c625 Mon Sep 17 00:00:00 2001
From: Frank Lichtenheld <frank@lichtenheld.de>
Date: Sun, 15 Mar 2009 18:49:15 +0100
Subject: [PATCH] Deb::Versions: Really only use AptPkg if available

---
 lib/Deb/Versions.pm | 28 ++++++++++++----------------
 1 file changed, 12 insertions(+), 16 deletions(-)

diff --git a/lib/Deb/Versions.pm b/lib/Deb/Versions.pm
index 35f0cb5..774c9b5 100644
--- a/lib/Deb/Versions.pm
+++ b/lib/Deb/Versions.pm
@@ -70,22 +70,6 @@ our @EXPORT = qw( version_cmp version_sort suites_cmp suites_sort );
 
 our $VERSION = v1.0.0;
 
-BEGIN {
-    eval {
-	use AptPkg::Config '$_config';
-	use AptPkg::System '$_system';
-	use AptPkg::Version;
-
-	$_config->init;
-	$_system = $_config->system;
-	my $apt_ver = $_system->versioning;
-	*version_cmp = sub { return $apt_ver->compare(@_) };
-    };
-    unless( *version_cmp ){
-	*version_cmp = \&version_cmp_pp;
-    }
-}
-
 my $re = qr/^(?:(\d+):)?([\w.+:~-]+?)(?:-([\w+.~]+))?$/;
 sub version_cmp_pp {
     return 0 if $_[0] eq $_[1];
@@ -119,6 +103,18 @@ sub version_cmp_pp {
     return $res;
 }
 
+*version_cmp = \&version_cmp_pp;
+eval {
+    require AptPkg::Config;
+    require AptPkg::System;
+    require AptPkg::Version;
+    
+    $AptPkg::Config::_config->init;
+    $AptPkg::System::_system = $AptPkg::Config::_config->system;
+    my $apt_ver = $AptPkg::System::_system->versioning;
+    *version_cmp = sub { return $apt_ver->compare(@_) };
+};
+
 sub version_sort {
     return sort { version_cmp( $b, $a ) } @_;
 }
-- 
2.39.2