X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=dgit.git;a=blobdiff_plain;f=git-debrebase;h=4f9a9bb98e21bbe6a5e46ddbc3adc262173d7fce;hp=ef619be4d1141f3cc7aa3d9884538ad9cf34841e;hb=cfbec7a706fd1f631ebbed0c545980590eb26656;hpb=185e64f8d95dd925adaa840595dd62af7ea88244

diff --git a/git-debrebase b/git-debrebase
index ef619be4..4f9a9bb9 100755
--- a/git-debrebase
+++ b/git-debrebase
@@ -263,11 +263,15 @@ sub read_tree_debian ($) {
     rm_subdir_cached 'debian/patches';
 }
 
-sub read_tree_upstream ($;$) {
-    my ($treeish, $keep_patches) = @_;
-    my $save = cmdoutput @git, qw(write-tree --prefix=debian/);
+sub read_tree_upstream ($;$$) {
+    my ($treeish, $keep_patches, $tree_with_debian) = @_;
+    # if $tree_with_debian is supplied, will use that for debian/
+    # otherwise will save and restore it.
+    my $debian =
+	$tree_with_debian ? "$tree_with_debian:debian"
+	: cmdoutput @git, qw(write-tree --prefix=debian/);
     runcmd @git, qw(read-tree), $treeish;
-    read_tree_subdir 'debian', $save;
+    read_tree_subdir 'debian', $debian;
     rm_subdir_cached 'debian/patches' unless $keep_patches;
 };