From: Matt S Trout <mst@shadowcat.co.uk>
Date: Tue, 15 Nov 2011 08:41:01 +0000 (+0000)
Subject: protect against re-upgrading
X-Git-Tag: v0.001002~19
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=fb0f5964bfe05daa3f82ec9261cfc0bb9d181223;p=scpubgit%2FTak.git

protect against re-upgrading
---

diff --git a/lib/Tak.pm b/lib/Tak.pm
index ce3ca2e..65a6153 100644
--- a/lib/Tak.pm
+++ b/lib/Tak.pm
@@ -5,15 +5,17 @@ use strictures 1;
 
 our $VERSION = '0.001001'; # 0.1.1
 
-our $loop;
+our ($loop, $did_upgrade);
 
 sub loop { $loop ||= Tak::Loop->new }
 
 sub loop_upgrade {
+  return if $did_upgrade;
   require IO::Async::Loop;
   my $new_loop = IO::Async::Loop->new;
   $loop->pass_watches_to($new_loop) if $loop;
   $loop = $new_loop;
+  $did_upgrade = 1;
 }
 
 sub loop_until {