From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sat, 17 Aug 2013 10:57:35 +0000 (+0100)
Subject: do not use git-show-ref as it is hopeless; just do it ourselves
X-Git-Tag: debian/0.3~24
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=17652b53bde8d7aa85a7cdd8fc6d7abcc94b2946;p=dgit.git

do not use git-show-ref as it is hopeless; just do it ourselves
---

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"