git-debrebase: merge: Avoid asking user to re-merge debian/

If it had conflicts, they will have been resolved earlier and we can
just take that resolution.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

1 files changed, 15 insertions, 3 deletions

diff --git a/git-debrebase b/git-debrebase
index 6d51a90..9c44419 100755
--- a/git-debrebase
+++ b/git-debrebase
@@ -395,10 +395,8 @@ sub merge_series ($$;@) {
 	foreach my $q ($base_q, reverse @input_qs) {
 	    my $s = $q->{MR}{S};
 	    gbp_pq_export "p-$s", $q->{SeriesBase}, $q->{SeriesTip};
-	    # xxx avoid trying to merge debian/ again here, by
-	    # always using debian/ from newbase
+	    my @earlier;
 	    if (open S, $seriesfile) {
-		my @earlier;
 		while (my $patch = <S>) {
 		    chomp $patch or die $!;
 		    $prereq{$patch} //= {};
@@ -426,6 +424,20 @@ sub merge_series ($$;@) {
                 "[git-debrebase merge-innards patch-queue prep:".
                 " $q->{SeriesTip}]"
             ];
+
+	    read_tree_debian $newbase;
+	    if (@earlier) {
+		read_tree_subdir 'debian/patches', "$pec:debian/patches";
+	    } else {
+		rm_subdir_cached 'debian/patches';
+	    }
+	    $pec = make_commit [ $pec ], [
+ "Update debian/ (excluding patches) to final to avoid re-merging",
+ "debian/ was already merged and we need to just take that.",
+                "[git-debrebase merge-innards patch-queue packaging:".
+                " $q->{SeriesTip}]"
+            ];
+
 	    printdebug "pec' $pec\n";
             runcmd @git, qw(reset -q --hard), $pec;
 	    $q->{MR}{PEC} = $pec;