From 17652b53bde8d7aa85a7cdd8fc6d7abcc94b2946 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sat, 17 Aug 2013 11:57:35 +0100
Subject: [PATCH] do not use git-show-ref as it is hopeless; just do it
 ourselves

---
 dgit | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/dgit b/dgit
index 279d92de..5fc93789 100755
--- a/dgit
+++ b/dgit
@@ -454,15 +454,17 @@ sub fetch_from_archive () {
 	print "last upload to archive has NO git hash\n";
     }
 
-    $!=0; $upload_hash =
-	cmdoutput_errok @git, qw(show-ref --heads), lrref();
-    if ($?==0) {
-	die unless chomp $upload_hash;
-    } elsif ($?==256) {
+    my $lrref_fn = ".git/".lrref();
+    if (open H, $lrref_fn) {
+	$upload_hash = <H>;
+	chomp $upload_hash;
+	die "$lrref_fn $upload_hash ?" unless $upload_hash =~ m/^\w+$/;
+    } elsif ($! == &ENOENT) {
 	$upload_hash = '';
     } else {
-	die $?;
+	die "$lrref_fn $!";
     }
+    print DEBUG "last upload hash $upload_hash\n";
     my $hash;
     if (defined $dsc_hash) {
 	die "missing git history even though dsc has hash"
-- 
2.30.2