+sub branch_is_gdr ($) {
+ my ($head) = @_;
+ # This is quite like git-debrebase's keycommits.
+ # We have our own implementation because:
+ # - our algorighm can do fewer tests so is faster
+ # - it saves testing to see if gdr is installed
+
+ # NB we use this jsut for deciding whether to run gdr make-patches
+ # Before reusing this algorithm for somthing else, its
+ # suitability should be reconsidered.
+
+ my $walk = $head;
+ local $Debian::Dgit::debugcmd_when_debuglevel = 3;
+ printdebug "branch_is_gdr $head...\n";
+ my $get_patches = sub {
+ my $t = git_cat_file "$_[0]:debian/patches", [qw(missing tree)];
+ return $t // '';
+ };
+ my $tip_patches = $get_patches->($head);
+ WALK:
+ for (;;) {
+ my $cdata = git_cat_file $walk, 'commit';
+ my ($hdrs,$msg) = $cdata =~ m{\n\n} ? ($`,$') : ($cdata,'');
+ if ($msg =~ m{^\[git-debrebase\ (
+ anchor | changelog | make-patches |
+ merged-breakwater | pseudomerge
+ ) [: ] }mx) {
+ # no need to analyse this - it's sufficient
+ # (gdr classifications: Anchor, MergedBreakwaters)
+ # (made by gdr: Pseudomerge, Changelog)
+ printdebug "branch_is_gdr $walk gdr $1 YES\n";
+ return 1;
+ }
+ my @parents = ($hdrs =~ m/^parent (\w+)$/gm);
+ if (@parents==2) {
+ my $walk_tree = get_tree_of_commit $walk;
+ foreach my $p (@parents) {
+ my $p_tree = get_tree_of_commit $p;
+ if ($p_tree eq $walk_tree) { # pseudomerge contriburor
+ # (gdr classification: Pseudomerge; not made by gdr)
+ printdebug "branch_is_gdr $walk unmarked pseudomerge\n"
+ if $debuglevel >= 2;
+ $walk = $p;
+ next WALK;
+ }
+ }
+ # some other non-gdr merge
+ # (gdr classification: VanillaMerge, DgitImportUnpatched, ?)
+ printdebug "branch_is_gdr $walk ?-2-merge NO\n";
+ return 0;
+ }
+ if (@parents>2) {
+ # (gdr classification: ?)
+ printdebug "branch_is_gdr $walk ?-octopus NO\n";
+ return 0;
+ }
+ if ($get_patches->($walk) ne $tip_patches) {
+ # Our parent added, removed, or edited patches, and wasn't
+ # a gdr make-patches commit. gdr make-patches probably
+ # won't do that well, then.
+ # (gdr classification of parent: AddPatches or ?)
+ printdebug "branch_is_gdr $walk ?-patches NO\n";
+ return 0;
+ }
+ if ($tip_patches eq '' and
+ !defined git_cat_file "$walk:debian") {
+ # (gdr classification of parent: BreakwaterStart
+ printdebug "branch_is_gdr $walk unmarked BreakwaterStart YES\n";
+ return 1;
+ }
+ # (gdr classification: Upstream Packaging Mixed Changelog)
+ printdebug "branch_is_gdr $walk plain\n"
+ if $debuglevel >= 2;
+ $walk = $parents[0];
+ }
+}
+
~ianmdlvl / dgit.git / blobdiff