+ runcmd @git, qw(checkout -q master);
+}
+
+sub build_maybe_quilt_fixup () {
+ my ($format,$fopts) = get_source_format;
+ return unless madformat $format;
+ # sigh
+
+ check_for_vendor_patches();
+
+ my $clogp = parsechangelog();
+ my $headref = git_rev_parse('HEAD');
+
+ prep_ud();
+ changedir $ud;
+
+ my $upstreamversion=$version;
+ $upstreamversion =~ s/-[^-]*$//;
+
+ if ($fopts->{'single-debian-patch'}) {
+ quilt_fixup_singlepatch($clogp, $headref, $upstreamversion);
+ } else {
+ quilt_fixup_multipatch($clogp, $headref, $upstreamversion);
+ }
+
+ die 'bug' if $split_brain && !$need_split_build_invocation;
+
+ changedir '../../../..';
+ runcmd_ordryrun_local
+ @git, qw(pull --ff-only -q .git/dgit/unpack/work master);
+}
+
+sub quilt_fixup_mkwork ($) {
+ my ($headref) = @_;
+
+ mkdir "work" or die $!;
+ changedir "work";
+ mktree_in_ud_here();
+ runcmd @git, qw(reset -q --hard), $headref;
+}
+
+sub quilt_fixup_linkorigs ($$) {
+ my ($upstreamversion, $fn) = @_;
+ # calls $fn->($leafname);
+
+ foreach my $f (<../../../../*>) { #/){
+ my $b=$f; $b =~ s{.*/}{};
+ {
+ local ($debuglevel) = $debuglevel-1;
+ printdebug "QF linkorigs $b, $f ?\n";
+ }
+ next unless is_orig_file $b, srcfn $upstreamversion,'';
+ printdebug "QF linkorigs $b, $f Y\n";
+ link_ltarget $f, $b or die "$b $!";
+ $fn->($b);
+ }
+}
+
+sub quilt_fixup_delete_pc () {
+ runcmd @git, qw(rm -rqf .pc);
+ commit_admin "Commit removal of .pc (quilt series tracking data)";
+}
+
+sub quilt_fixup_singlepatch ($$$) {
+ my ($clogp, $headref, $upstreamversion) = @_;
+
+ progress "starting quiltify (single-debian-patch)";
+
+ # dpkg-source --commit generates new patches even if
+ # single-debian-patch is in debian/source/options. In order to
+ # get it to generate debian/patches/debian-changes, it is
+ # necessary to build the source package.
+
+ quilt_fixup_linkorigs($upstreamversion, sub { });
+ quilt_fixup_mkwork($headref);
+
+ rmtree("debian/patches");
+
+ runcmd @dpkgsource, qw(-b .);
+ chdir "..";
+ runcmd @dpkgsource, qw(-x), (srcfn $version, ".dsc");
+ rename srcfn("$upstreamversion", "/debian/patches"),
+ "work/debian/patches";
+
+ chdir "work";
+ commit_quilty_patch();
+}
+
+sub quilt_make_fake_dsc ($) {
+ my ($upstreamversion) = @_;
+
+ my $fakeversion="$upstreamversion-~~DGITFAKE";
+
+ my $fakedsc=new IO::File 'fake.dsc', '>' or die $!;
+ print $fakedsc <<END or die $!;
+Format: 3.0 (quilt)
+Source: $package
+Version: $fakeversion
+Files:
+END
+
+ my $dscaddfile=sub {
+ my ($b) = @_;
+
+ my $md = new Digest::MD5;
+
+ my $fh = new IO::File $b, '<' or die "$b $!";
+ stat $fh or die $!;
+ my $size = -s _;
+
+ $md->addfile($fh);
+ print $fakedsc " ".$md->hexdigest." $size $b\n" or die $!;
+ };
+
+ quilt_fixup_linkorigs($upstreamversion, $dscaddfile);
+
+ my @files=qw(debian/source/format debian/rules
+ debian/control debian/changelog);
+ foreach my $maybe (qw(debian/patches debian/source/options
+ debian/tests/control)) {
+ next unless stat_exists "../../../$maybe";
+ push @files, $maybe;
+ }
+
+ my $debtar= srcfn $fakeversion,'.debian.tar.gz';
+ runcmd qw(env GZIP=-1n tar -zcf), "./$debtar", qw(-C ../../..), @files;
+
+ $dscaddfile->($debtar);
+ close $fakedsc or die $!;
+}
+
+sub quilt_check_splitbrain_cache ($$) {
+ my ($headref, $upstreamversion) = @_;
+ # Called only if we are in (potentially) split brain mode.
+ # Called in $ud.
+ # Computes the cache key and looks in the cache.
+ # Returns ($dgit_view_commitid, $cachekey) or (undef, $cachekey)
+
+ my $splitbrain_cachekey;
+
+ progress
+ "dgit: split brain (separate dgit view) may be needed (--quilt=$quilt_mode).";
+ # we look in the reflog of dgit-intern/quilt-cache
+ # we look for an entry whose message is the key for the cache lookup
+ my @cachekey = (qw(dgit), $our_version);
+ push @cachekey, $upstreamversion;
+ push @cachekey, $quilt_mode;
+ push @cachekey, $headref;
+
+ push @cachekey, hashfile('fake.dsc');
+
+ my $srcshash = Digest::SHA->new(256);
+ my %sfs = ( %INC, '$0(dgit)' => $0 );
+ foreach my $sfk (sort keys %sfs) {
+ next unless m/^\$0\b/ || m{^Debian/Dgit\b};
+ $srcshash->add($sfk," ");
+ $srcshash->add(hashfile($sfs{$sfk}));
+ $srcshash->add("\n");
+ }
+ push @cachekey, $srcshash->hexdigest();
+ $splitbrain_cachekey = "@cachekey";
+
+ my @cmd = (@git, qw(reflog), '--pretty=format:%H %gs',
+ $splitbraincache);
+ printdebug "splitbrain cachekey $splitbrain_cachekey\n";
+ debugcmd "|(probably)",@cmd;
+ my $child = open GC, "-|"; defined $child or die $!;
+ if (!$child) {
+ chdir '../../..' or die $!;
+ if (!stat ".git/logs/refs/$splitbraincache") {
+ $! == ENOENT or die $!;
+ printdebug ">(no reflog)\n";
+ exit 0;
+ }
+ exec @cmd; die $!;
+ }
+ while (<GC>) {
+ chomp;
+ printdebug ">| ", $_, "\n" if $debuglevel > 1;
+ next unless m/^(\w+) (\S.*\S)$/ && $2 eq $splitbrain_cachekey;
+
+ my $cachehit = $1;
+ quilt_fixup_mkwork($headref);
+ if ($cachehit ne $headref) {
+ progress "dgit view: found cached (commit id $cachehit)";
+ runcmd @git, qw(checkout -q -b dgit-view), $cachehit;
+ $split_brain = 1;
+ return ($cachehit, $splitbrain_cachekey);
+ }
+ progress "dgit view: found cached, no changes required";
+ return ($headref, $splitbrain_cachekey);
+ }
+ die $! if GC->error;
+ failedcmd unless close GC;
+
+ printdebug "splitbrain cache miss\n";
+ return (undef, $splitbrain_cachekey);
+}
+
+sub quilt_fixup_multipatch ($$$) {
+ my ($clogp, $headref, $upstreamversion) = @_;
+
+ progress "examining quilt state (multiple patches, $quilt_mode mode)";
+
+ # Our objective is:
+ # - honour any existing .pc in case it has any strangeness
+ # - determine the git commit corresponding to the tip of
+ # the patch stack (if there is one)
+ # - if there is such a git commit, convert each subsequent
+ # git commit into a quilt patch with dpkg-source --commit
+ # - otherwise convert all the differences in the tree into
+ # a single git commit
+ #
+ # To do this we:
+
+ # Our git tree doesn't necessarily contain .pc. (Some versions of
+ # dgit would include the .pc in the git tree.) If there isn't
+ # one, we need to generate one by unpacking the patches that we
+ # have.
+ #
+ # We first look for a .pc in the git tree. If there is one, we
+ # will use it. (This is not the normal case.)
+ #
+ # Otherwise need to regenerate .pc so that dpkg-source --commit
+ # can work. We do this as follows:
+ # 1. Collect all relevant .orig from parent directory
+ # 2. Generate a debian.tar.gz out of
+ # debian/{patches,rules,source/format,source/options}
+ # 3. Generate a fake .dsc containing just these fields:
+ # Format Source Version Files
+ # 4. Extract the fake .dsc
+ # Now the fake .dsc has a .pc directory.
+ # (In fact we do this in every case, because in future we will
+ # want to search for a good base commit for generating patches.)
+ #
+ # Then we can actually do the dpkg-source --commit
+ # 1. Make a new working tree with the same object
+ # store as our main tree and check out the main
+ # tree's HEAD.
+ # 2. Copy .pc from the fake's extraction, if necessary
+ # 3. Run dpkg-source --commit
+ # 4. If the result has changes to debian/, then
+ # - git-add them them
+ # - git-add .pc if we had a .pc in-tree
+ # - git-commit
+ # 5. If we had a .pc in-tree, delete it, and git-commit
+ # 6. Back in the main tree, fast forward to the new HEAD
+
+ # Another situation we may have to cope with is gbp-style
+ # patches-unapplied trees.
+ #
+ # We would want to detect these, so we know to escape into
+ # quilt_fixup_gbp. However, this is in general not possible.
+ # Consider a package with a one patch which the dgit user reverts
+ # (with git-revert or the moral equivalent).
+ #
+ # That is indistinguishable in contents from a patches-unapplied
+ # tree. And looking at the history to distinguish them is not
+ # useful because the user might have made a confusing-looking git
+ # history structure (which ought to produce an error if dgit can't
+ # cope, not a silent reintroduction of an unwanted patch).
+ #
+ # So gbp users will have to pass an option. But we can usually
+ # detect their failure to do so: if the tree is not a clean
+ # patches-applied tree, quilt linearisation fails, but the tree
+ # _is_ a clean patches-unapplied tree, we can suggest that maybe
+ # they want --quilt=unapplied.
+ #
+ # To help detect this, when we are extracting the fake dsc, we
+ # first extract it with --skip-patches, and then apply the patches
+ # afterwards with dpkg-source --before-build. That lets us save a
+ # tree object corresponding to .origs.
+
+ my $splitbrain_cachekey;
+
+ quilt_make_fake_dsc($upstreamversion);
+
+ if (quiltmode_splitbrain()) {
+ my $cachehit;
+ ($cachehit, $splitbrain_cachekey) =
+ quilt_check_splitbrain_cache($headref, $upstreamversion);
+ return if $cachehit;
+ }
+
+ runcmd qw(sh -ec),
+ 'exec dpkg-source --no-check --skip-patches -x fake.dsc >/dev/null';
+
+ my $fakexdir= $package.'-'.(stripepoch $upstreamversion);
+ rename $fakexdir, "fake" or die "$fakexdir $!";
+
+ changedir 'fake';
+
+ remove_stray_gits();
+ mktree_in_ud_here();
+
+ rmtree '.pc';
+
+ runcmd @git, qw(add -Af .);
+ my $unapplied=git_write_tree();
+ printdebug "fake orig tree object $unapplied\n";
+
+ ensuredir '.pc';
+
+ runcmd qw(sh -ec),
+ 'exec dpkg-source --before-build . >/dev/null';
+
+ changedir '..';
+
+ quilt_fixup_mkwork($headref);
+
+ my $mustdeletepc=0;
+ if (stat_exists ".pc") {
+ -d _ or die;
+ progress "Tree already contains .pc - will use it then delete it.";
+ $mustdeletepc=1;
+ } else {
+ rename '../fake/.pc','.pc' or die $!;
+ }
+
+ changedir '../fake';
+ rmtree '.pc';
+ runcmd @git, qw(add -Af .);
+ my $oldtiptree=git_write_tree();
+ printdebug "fake o+d/p tree object $unapplied\n";
+ changedir '../work';
+
+
+ # We calculate some guesswork now about what kind of tree this might
+ # be. This is mostly for error reporting.
+
+ my %editedignores;
+ my $diffbits = {
+ # H = user's HEAD
+ # O = orig, without patches applied
+ # A = "applied", ie orig with H's debian/patches applied
+ H2O => quiltify_trees_differ($headref, $unapplied, 1,\%editedignores),
+ H2A => quiltify_trees_differ($headref, $oldtiptree,1),
+ O2A => quiltify_trees_differ($unapplied,$oldtiptree,1),
+ };
+
+ my @dl;
+ foreach my $b (qw(01 02)) {
+ foreach my $v (qw(H2O O2A H2A)) {
+ push @dl, ($diffbits->{$v} & $b) ? '##' : '==';
+ }
+ }
+ printdebug "differences \@dl @dl.\n";
+
+ progress sprintf
+"$us: quilt differences: src: %s orig %s gitignores: %s orig %s\n".
+"$us: quilt differences: HEAD %s o+d/p HEAD %s o+d/p",
+ $dl[0], $dl[1], $dl[3], $dl[4],
+ $dl[2], $dl[5];
+
+ my @failsuggestion;
+ if (!($diffbits->{H2O} & $diffbits->{O2A})) {
+ push @failsuggestion, "This might be a patches-unapplied branch.";
+ } elsif (!($diffbits->{H2A} & $diffbits->{O2A})) {
+ push @failsuggestion, "This might be a patches-applied branch.";
+ }
+ push @failsuggestion, "Maybe you need to specify one of".
+ " --quilt=gbp --quilt=dpm --quilt=unapplied ?";
+
+ if (quiltmode_splitbrain()) {
+ quiltify_splitbrain($clogp, $unapplied, $headref,
+ $diffbits, \%editedignores,
+ $splitbrain_cachekey);
+ return;
+ }
+
+ progress "starting quiltify (multiple patches, $quilt_mode mode)";
+ quiltify($clogp,$headref,$oldtiptree,\@failsuggestion);
+