New option --dgit-view-save= for split view quilt modes.

[dgit.git] / dgit

diff --git a/dgit b/dgit
index 8e72b2aac1c93535faaaf29173e2f46e0b281c67..3e746d2cce9808bbc3ca1e74a48c4577e2ff7ee9 100755 (executable)
--- a/dgit
+++ b/dgit
@@ -67,6 +67,7 @@ our $rmchanges;
 our $overwrite_version; # undef: not specified; '': check changelog
 our $quilt_mode;
 our $quilt_modes_re = 'linear|smash|auto|nofix|nocheck|gbp|dpm|unapplied';
+our $split_brain_save;
 our $we_are_responder;
 our $initiator_tempdir;
 our $patches_applied_dirtily = 00;
@@ -2981,6 +2982,18 @@ sub madformat_wantfixup ($) {
     return 1;
 }
 
+sub maybe_split_brain_save ($$$) {
+    my ($headref, $dgitview, $msg) = @_;
+    # => message fragment "$saved" describing disposition of $dgitview
+    return "commit id $dgitview" unless defined $split_brain_save;
+    my @cmd = (shell_cmd "cd ../../../..",
+              @git, qw(update-ref -m),
+              "dgit --dgit-view-save $msg HEAD=$headref",
+              $split_brain_save, $dgitview);
+    runcmd @cmd;
+    return "and left in $split_brain_save";
+}
+
 # An "infopair" is a tuple [ $thing, $what ]
 # (often $thing is a commit hash; $what is a description)
 
@@ -3141,6 +3154,8 @@ END_OVERWR
 Make fast forward from $i_arch_v->[0]
 END_MAKEFF
 
+    maybe_split_brain_save $maintview, $r, "pseudomerge";
+
     progress "Made pseudo-merge of $i_arch_v->[0] into dgit view.";
     return $r;
 }      
@@ -4159,9 +4174,10 @@ END
     runcmd @git, qw(update-ref -m), $cachekey, "refs/$splitbraincache",
        $dgitview;
 
-    progress "dgit view: created (commit id $dgitview)";
-
     changedir '.git/dgit/unpack/work';
+
+    my $saved = maybe_split_brain_save $headref, $dgitview, "converted";
+    progress "dgit view: created ($saved)";
 }
 
 sub quiltify ($$$$) {
@@ -4631,8 +4647,9 @@ sub quilt_check_splitbrain_cache ($$) {
            
        my $cachehit = $1;
        quilt_fixup_mkwork($headref);
+       my $saved = maybe_split_brain_save $headref, $cachehit, "cache-hit";
        if ($cachehit ne $headref) {
-           progress "dgit view: found cached (commit id $cachehit)";
+           progress "dgit view: found cached ($saved)";
            runcmd @git, qw(checkout -q -b dgit-view), $cachehit;
            $split_brain = 1;
            return ($cachehit, $splitbrain_cachekey);
@@ -5581,6 +5598,10 @@ sub parseopts () {
            } elsif (m/^--overwrite=(.+)$/s) {
                push @ropts, $_;
                $overwrite_version = $1;
+           } elsif (m/^--dgit-view-save=(.+)$/s) {
+               push @ropts, $_;
+               $split_brain_save = $1;
+               $split_brain_save =~ s#^(?!refs/)#refs/heads/#;
            } elsif (m/^--(no-)?rm-old-changes$/s) {
                push @ropts, $_;
                $rmchanges = !$1;