git-debrebase: rebase: go back to my $build

We never don't have exactly one parent

1 files changed, 8 insertions, 11 deletions

diff --git a/git-debrebase b/git-debrebase
index 4fb5e91..e83822c 100755
--- a/git-debrebase
+++ b/git-debrebase
@@ -354,9 +354,9 @@ sub walk {
     };
 
     my $build_start = sub {
-	my ($msg, $parents) = @_;
+	my ($msg, $parent) = @_;
 	$prline->(" $msg");
-	push @brw_cl, { ExactlyParents => $parents };
+	$build = $parent;
 	no warnings qw(exiting); last;
     };
 
@@ -369,10 +369,9 @@ sub walk {
 	die "commit $cur: Cannot cope with this commit";
     };
 
+    my $build;
+
     for (;;) {
-	if (!defined $cur) {
-	    $build_start->('Origin', []);
-	}
 	$cl = classify $cur;
 	my $ty = $cl->{Type};
 	my $st = $cl->{SubType};
@@ -389,7 +388,7 @@ sub walk {
 	    $cur = $p0;
 	    next;
 	} elsif ($ty eq 'BreakwaterStart') {
-	    $build_start->('FirstPackaging',[$cur]);
+	    $build_start->('FirstPackaging', $cur);
 	} elsif ($ty eq 'Upstream') {
 	    push @upp_cl, $cl;
 	    $cur = $p0;
@@ -412,7 +411,7 @@ sub walk {
 	    $cur = $ty->{Contributor};
 	    next;
 	} elsif ($ty eq 'BreakwaterUpstreamMerge') {
-	    $build_start->("PreviousBreakwater", [$cur]);
+	    $build_start->("PreviousBreakwater", $cur);
 	} elsif ($ty eq 'DgitImportUnpatched') {
 	    my $pm = $pseudomerges[-1];
 	    if (defined $pm) {
@@ -475,7 +474,7 @@ sub walk {
 		# last thing we processed will have been the first patch,
 		# if there is one; which is fine, so no need to rewrite
 		# on account of this import
-		$build_start->("ImportOrigin",[$cur]);
+		$build_start->("ImportOrigin", $cur);
 	    }
 	    die "$ty ?";
         } else {
@@ -491,8 +490,6 @@ sub walk {
 
     my $rewriting = 0;
 
-    my $build = $basis;
-
     my $rm_tree_cached = sub {
 	my ($subdir) = @_;
 	runcmd @git, qw(rm --quiet -rf --cached), $subdir;
@@ -531,8 +528,8 @@ sub walk {
 		$rewriting = 1;
 		next;
 	    } elsif ($method eq 'RecordBreakwaterTip') {
-		last if $wantbrwonly;
 		$breakwater = $build;
+		last if $wantbrwonly;
 		next;
 	    } elsif ($method eq 'DgitImportDebianUpdate') {
 		$read_tree_debian->($cltree);