sub read_tree_upstream ($;$$) {
my ($treeish, $keep_patches, $tree_with_debian) = @_;
# if $tree_with_debian is supplied, will use that for debian/
sub read_tree_upstream ($;$$) {
my ($treeish, $keep_patches, $tree_with_debian) = @_;
# if $tree_with_debian is supplied, will use that for debian/