From 2f611c6de222547a01d81d50dc5cfecb9fb7d277 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Wed, 27 May 2015 21:36:15 +0100
Subject: dgit: Declare a "supersedes" in the signed tag for all previous
 refs/heads and refs/tags in the repo, when deliberately_not_fast_forward

---
 dgit | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

(limited to 'dgit')

diff --git a/dgit b/dgit
index 6e9c304..c315c7f 100755
--- a/dgit
+++ b/dgit
@@ -111,6 +111,8 @@ sub lref () { return "refs/heads/".lbranch(); }
 sub lrref () { return "refs/remotes/$remotename/".server_branch($csuite); }
 sub rrref () { return server_ref($csuite); }
 
+sub lrfetchrefs () { return "refs/dgit-fetch/$isuite"; }
+
 sub stripepoch ($) {
     my ($vsn) = @_;
     $vsn =~ s/^\d+\://;
@@ -1261,6 +1263,11 @@ sub ensure_we_have_orig () {
 
 sub git_fetch_us () {
     runcmd_ordryrun_local @git, qw(fetch),access_giturl(),fetchspec();
+    if (deliberately_not_fast_forward) {
+	runcmd_ordryrun_local @git, qw(fetch -p), access_giturl(),
+	    map { "+refs/$_/*:".lrfetchrefs."/$_/*" }
+	    qw(tags heads);
+    }
 }
 
 sub fetch_from_archive () {
@@ -1653,11 +1660,12 @@ sub dopush ($) {
     responder_send_command("param head $head");
     responder_send_command("param csuite $csuite");
 
-    if ($forceflag && defined $lastpush_hash) {
-	git_for_each_tag_referring($lastpush_hash, sub {
-	    my ($tagobjid,$refobjid,$fullrefname,$tagname) = @_;
-	    responder_send_command("supersedes $fullrefname=$tagobjid");
-	    $supersedes{$fullrefname} = $tagobjid;
+    if ($forceflag) {
+	git_for_each_ref(lrfetchrefs, sub {
+	    my ($objid,$objtype,$lrfetchrefname,$reftail) = @_;
+	    my $rrefname= substr($lrfetchrefname, length(lrfetchrefs) + 1);
+	    responder_send_command("supersedes $rrefname=$objid");
+	    $supersedes{$rrefname} = $objid;
 	});
     }
 
-- 
cgit v1.2.3