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third_party/dpkg-dev/scripts/Dpkg/Source/Package/V3/Quilt.pm

Index: third_party/dpkg-dev/scripts/Dpkg/Source/Package/V3/Quilt.pm
diff --git a/third_party/dpkg-dev/scripts/Dpkg/Source/Package/V3/Quilt.pm b/third_party/dpkg-dev/scripts/Dpkg/Source/Package/V3/Quilt.pm
new file mode 100644
index 0000000000000000000000000000000000000000..6feb3f675be0f6dff5f1806f82e32b6b1d40cd29
--- /dev/null
+++ b/third_party/dpkg-dev/scripts/Dpkg/Source/Package/V3/Quilt.pm
@@ -0,0 +1,291 @@
+# Copyright © 2008-2012 Raphaël Hertzog <hertzog@debian.org>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package Dpkg::Source::Package::V3::Quilt;
+
+use strict;
+use warnings;
+
+our $VERSION = '0.01';
+
+# Based on wig&pen implementation
+use parent qw(Dpkg::Source::Package::V2);
+
+use Dpkg;
+use Dpkg::Gettext;
+use Dpkg::ErrorHandling;
+use Dpkg::Util qw(:list);
+use Dpkg::Version;
+use Dpkg::Source::Patch;
+use Dpkg::Source::Functions qw(erasedir fs_time);
+use Dpkg::Source::Quilt;
+use Dpkg::Exit;
+
+use File::Spec;
+use File::Copy;
+
+our $CURRENT_MINOR_VERSION = '0';
+
+sub init_options {
+    my ($self) = @_;
+    $self->{options}{single_debian_patch} = 0
+        unless exists $self->{options}{single_debian_patch};
+    $self->{options}{allow_version_of_quilt_db} = []
+        unless exists $self->{options}{allow_version_of_quilt_db};
+
+    $self->SUPER::init_options();
+}
+
+sub parse_cmdline_option {
+    my ($self, $opt) = @_;
+    return 1 if $self->SUPER::parse_cmdline_option($opt);
+    if ($opt =~ /^--single-debian-patch$/) {
+        $self->{options}{single_debian_patch} = 1;
+        # For backwards compatibility.
+        $self->{options}{auto_commit} = 1;
+        return 1;
+    } elsif ($opt =~ /^--allow-version-of-quilt-db=(.*)$/) {
+        push @{$self->{options}{allow_version_of_quilt_db}}, $1;
+        return 1;
+    }
+    return 0;
+}
+
+sub build_quilt_object {
+    my ($self, $dir) = @_;
+    return $self->{quilt}{$dir} if exists $self->{quilt}{$dir};
+    $self->{quilt}{$dir} = Dpkg::Source::Quilt->new($dir);
+    return $self->{quilt}{$dir};
+}
+
+sub can_build {
+    my ($self, $dir) = @_;
+    my ($code, $msg) = $self->SUPER::can_build($dir);
+    return ($code, $msg) if $code == 0;
+
+    my $v = Dpkg::Version->new($self->{fields}->{'Version'});
+    warning (_g('version does not contain a revision')) if $v->is_native();
+
+    my $quilt = $self->build_quilt_object($dir);
+    $msg = $quilt->find_problems();
+    return (0, $msg) if $msg;
+    return 1;
+}
+
+sub get_autopatch_name {
+    my ($self) = @_;
+    if ($self->{options}{single_debian_patch}) {
+        return 'debian-changes';
+    } else {
+        return 'debian-changes-' . $self->{fields}{'Version'};
+    }
+}
+
+sub apply_patches {
+    my ($self, $dir, %opts) = @_;
+
+    if ($opts{usage} eq 'unpack') {
+        $opts{verbose} = 1;
+    } elsif ($opts{usage} eq 'build') {
+        $opts{warn_options} = 1;
+        $opts{verbose} = 0;
+    }
+
+    my $quilt = $self->build_quilt_object($dir);
+    $quilt->load_series(%opts) if $opts{warn_options}; # Trigger warnings
+
+    # Always create the quilt db so that if the maintainer calls quilt to
+    # create a patch, it's stored in the right directory
+    $quilt->write_db();
+
+    # Update debian/patches/series symlink if needed to allow quilt usage
+    my $series = $quilt->get_series_file();
+    my $basename = (File::Spec->splitpath($series))[2];
+    if ($basename ne 'series') {
+        my $dest = $quilt->get_patch_file('series');
+        unlink($dest) if -l $dest;
+        unless (-f _) { # Don't overwrite real files
+            symlink($basename, $dest)
+                or syserr(_g("can't create symlink %s"), $dest);
+        }
+    }
+
+    return unless scalar($quilt->series());
+
+    if ($opts{usage} eq 'preparation' and
+        $self->{options}{unapply_patches} eq 'auto') {
+        # We're applying the patches in --before-build, remember to unapply
+        # them afterwards in --after-build
+        my $pc_unapply = $quilt->get_db_file('.dpkg-source-unapply');
+        open(my $unapply_fh, '>', $pc_unapply)
+            or syserr(_g('cannot write %s'), $pc_unapply);
+        close($unapply_fh);
+    }
+
+    # Apply patches
+    my $pc_applied = $quilt->get_db_file('applied-patches');
+    $opts{timestamp} = fs_time($pc_applied);
+    if ($opts{skip_auto}) {
+        my $auto_patch = $self->get_autopatch_name();
+        $quilt->push(%opts) while ($quilt->next() and $quilt->next() ne $auto_patch);
+    } else {
+        $quilt->push(%opts) while $quilt->next();
+    }
+}
+
+sub unapply_patches {
+    my ($self, $dir, %opts) = @_;
+
+    my $quilt = $self->build_quilt_object($dir);
+
+    $opts{verbose} //= 1;
+
+    my $pc_applied = $quilt->get_db_file('applied-patches');
+    my @applied = $quilt->applied();
+    $opts{timestamp} = fs_time($pc_applied) if @applied;
+
+    $quilt->pop(%opts) while $quilt->top();
+
+    erasedir($quilt->get_db_dir());
+}
+
+sub prepare_build {
+    my ($self, $dir) = @_;
+    $self->SUPER::prepare_build($dir);
+    # Skip .pc directories of quilt by default and ignore difference
+    # on debian/patches/series symlinks and d/p/.dpkg-source-applied
+    # stamp file created by ourselves
+    my $func = sub {
+        return 1 if $_[0] =~ m{^debian/patches/series$} and -l $_[0];
+        return 1 if $_[0] =~ /^\.pc(\/|$)/;
+        return 1 if $_[0] =~ /$self->{options}{diff_ignore_regex}/;
+        return 0;
+    };
+    $self->{diff_options}{diff_ignore_func} = $func;
+}
+
+sub do_build {
+    my ($self, $dir) = @_;
+
+    my $quilt = $self->build_quilt_object($dir);
+    my $version = $quilt->get_db_version();
+
+    if (defined($version) and $version != 2) {
+        if (any { $version eq $_ }
+            @{$self->{options}{allow_version_of_quilt_db}})
+        {
+            warning(_g('unsupported version of the quilt metadata: %s'), $version);
+        } else {
+            error(_g('unsupported version of the quilt metadata: %s'), $version);
+        }
+    }
+
+    $self->SUPER::do_build($dir);
+}
+
+sub after_build {
+    my ($self, $dir) = @_;
+    my $quilt = $self->build_quilt_object($dir);
+    my $pc_unapply = $quilt->get_db_file('.dpkg-source-unapply');
+    my $opt_unapply = $self->{options}{unapply_patches};
+    if (($opt_unapply eq 'auto' and -e $pc_unapply) or $opt_unapply eq 'yes') {
+        unlink($pc_unapply);
+        $self->unapply_patches($dir);
+    }
+}
+
+sub check_patches_applied {
+    my ($self, $dir) = @_;
+
+    my $quilt = $self->build_quilt_object($dir);
+    my $next = $quilt->next();
+    return if not defined $next;
+
+    my $first_patch = File::Spec->catfile($dir, 'debian', 'patches', $next);
+    my $patch_obj = Dpkg::Source::Patch->new(filename => $first_patch);
+    return unless $patch_obj->check_apply($dir);
+
+    $self->apply_patches($dir, usage => 'preparation', verbose => 1);
+}
+
+sub _add_line {
+    my ($file, $line) = @_;
+
+    open(my $file_fh, '>>', $file) or syserr(_g('cannot write %s'), $file);
+    print { $file_fh } "$line\n";
+    close($file_fh);
+}
+
+sub _drop_line {
+    my ($file, $re) = @_;
+
+    open(my $file_fh, '<', $file) or syserr(_g('cannot read %s'), $file);
+    my @lines = <$file_fh>;
+    close($file_fh);
+    open($file_fh, '>', $file) or syserr(_g('cannot write %s'), $file);
+    print { $file_fh } $_ foreach grep { not /^\Q$re\E\s*$/ } @lines;
+    close($file_fh);
+}
+
+sub register_patch {
+    my ($self, $dir, $tmpdiff, $patch_name) = @_;
+
+    my $quilt = $self->build_quilt_object($dir);
+
+    my @patches = $quilt->series();
+    my $has_patch = (grep { $_ eq $patch_name } @patches) ? 1 : 0;
+    my $series = $quilt->get_series_file();
+    my $applied = $quilt->get_db_file('applied-patches');
+    my $patch = $quilt->get_patch_file($patch_name);
+
+    if (-s $tmpdiff) {
+        copy($tmpdiff, $patch)
+            or syserr(_g('failed to copy %s to %s'), $tmpdiff, $patch);
+        chmod(0666 & ~ umask(), $patch)
+            or syserr(_g("unable to change permission of `%s'"), $patch);
+    } elsif (-e $patch) {
+        unlink($patch) or syserr(_g('cannot remove %s'), $patch);
+    }
+
+    if (-e $patch) {
+        $quilt->setup_db();
+        # Add patch to series file
+        if (not $has_patch) {
+            _add_line($series, $patch_name);
+            _add_line($applied, $patch_name);
+            $quilt->load_series();
+            $quilt->load_db();
+        }
+        # Ensure quilt meta-data are created and in sync with some trickery:
+        # reverse-apply the patch, drop .pc/$patch, re-apply it
+        # with the correct options to recreate the backup files
+        $quilt->pop(reverse_apply => 1);
+        $quilt->push();
+    } else {
+        # Remove auto_patch from series
+        if ($has_patch) {
+            _drop_line($series, $patch_name);
+            _drop_line($applied, $patch_name);
+            erasedir($quilt->get_db_file($patch_name));
+            $quilt->load_db();
+            $quilt->load_series();
+        }
+        # Clean up empty series
+        unlink($series) if -z $series;
+    }
+    return $patch;
+}
+
+1;