8 files changed, 1207 insertions, 0 deletions
diff --git a/lib/Lintian/Processable/Source/Changelog.pm b/lib/Lintian/Processable/Source/Changelog.pm
new file mode 100644
index 0000000..a781057
--- /dev/null
+++ b/lib/Lintian/Processable/Source/Changelog.pm
@@ -0,0 +1,109 @@
+# -*- perl -*- Lintian::Processable::Source::Changelog -- access to collected changelog data
+#
+# Copyright (C) 1998 Richard Braakman
+# Copyright (C) 2019-2021 Felix Lechner
+#
+# 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 <http://www.gnu.org/licenses/>.
+
+package Lintian::Processable::Source::Changelog;
+
+use v5.20;
+use warnings;
+use utf8;
+
+use Moo::Role;
+use namespace::clean;
+
+=head1 NAME
+
+Lintian::Processable::Source::Changelog - access to collected changelog data
+
+=head1 SYNOPSIS
+
+    use Lintian::Processable;
+
+=head1 DESCRIPTION
+
+Lintian::Processable::Source::Changelog provides an interface to changelog data.
+
+=head1 INSTANCE METHODS
+
+=over 4
+
+=item changelog_item
+
+=cut
+
+has changelog_item => (
+    is => 'rw',
+    lazy => 1,
+    default => sub {
+        my ($self) = @_;
+
+        my $item = $self->patched->resolve_path('debian/changelog');
+
+        return $item;
+    }
+);
+
+=item changelog
+
+Returns the changelog of the source package as a Parse::DebianChangelog
+object, or an empty object if the changelog cannot be resolved safely.
+
+=cut
+
+has changelog => (
+    is => 'rw',
+    lazy => 1,
+    default => sub {
+        my ($self) = @_;
+
+        my $changelog = Lintian::Changelog->new;
+
+        my $item = $self->changelog_item;
+
+        # return empty changelog
+        return $changelog
+          unless defined $item && $item->is_open_ok;
+
+        return $changelog
+          unless $item->is_valid_utf8;
+
+        $changelog->parse($item->decoded_utf8);
+
+        return $changelog;
+    }
+);
+
+1;
+
+=back
+
+=head1 AUTHOR
+
+Originally written by Felix Lechner <felix.lechner@lease-up.com> for
+Lintian.
+
+=head1 SEE ALSO
+
+lintian(1)
+
+=cut
+
+# Local Variables:
+# indent-tabs-mode: nil
+# cperl-indent-level: 4
+# End:
+# vim: syntax=perl sw=4 sts=4 sr et
diff --git a/lib/Lintian/Processable/Source/Components.pm b/lib/Lintian/Processable/Source/Components.pm
new file mode 100644
index 0000000..1541abe
--- /dev/null
+++ b/lib/Lintian/Processable/Source/Components.pm
@@ -0,0 +1,126 @@
+# -*- perl -*-
+# Lintian::Processable::Source::Components -- interface to orig tag components
+#
+# Copyright (C) 2020 Felix Lechner
+#
+# 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 <http://www.gnu.org/licenses/>.
+
+package Lintian::Processable::Source::Components;
+
+use v5.20;
+use warnings;
+use utf8;
+
+use Const::Fast;
+use Unicode::UTF8 qw(encode_utf8);
+
+use Moo::Role;
+use namespace::clean;
+
+const my $EMPTY => q{};
+
+=head1 NAME
+
+Lintian::Processable::Source::Components - interface to orig tar components
+
+=head1 SYNOPSIS
+
+   use Moo;
+
+   with 'Lintian::Processable::Source::Components';
+
+=head1 DESCRIPTION
+
+Lintian::Processable::Source::Components provides an interface to data for
+upstream source components. Most sources only use one tarball.
+
+=head1 INSTANCE METHODS
+
+=over 4
+
+=item components
+
+Returns a reference to a hash containing information about source components
+listed in the .dsc file.  The key is the filename, and the value is the name
+of the component.
+
+=cut
+
+has components => (
+    is => 'rw',
+    lazy => 1,
+    default => sub {
+        my ($self) = @_;
+
+        # determine source and version; handle missing fields
+        my $name = $self->fields->value('Source');
+        my $version = $self->fields->value('Version');
+        my $architecture = 'source';
+
+        # it is its own source package
+        my $source = $name;
+        my $source_version = $version;
+
+        # version handling based on Dpkg::Version::parseversion.
+        my $noepoch = $source_version;
+        if ($noepoch =~ /:/) {
+            $noepoch =~ s/^(?:\d+):(.+)/$1/
+              or die encode_utf8("Bad version number '$noepoch'");
+        }
+
+        my $baserev = $source . '_' . $noepoch;
+
+        # strip debian revision
+        $noepoch =~ s/(.+)-(?:.*)$/$1/;
+        my $base = $source . '_' . $noepoch;
+
+        my $files = $self->files;
+
+        my %components;
+        for my $name (keys %{$files}) {
+
+            # Look for $pkg_$version.orig(-$comp)?.tar.$ext (non-native)
+            #       or $pkg_$version.tar.$ext (native)
+            #  - This deliberately does not look for the debian packaging
+            #    even when this would be a tarball.
+            if ($name
+                =~ /^(?:\Q$base\E\.orig(?:-(.*))?|\Q$baserev\E)\.tar\.(?:gz|bz2|lzma|xz)$/
+            ) {
+                $components{$name} = $1 // $EMPTY;
+            }
+        }
+
+        return \%components;
+    }
+);
+
+=back
+
+=head1 AUTHOR
+
+Originally written by Adam D. Barratt <adsb@debian.org> for Lintian.
+
+=head1 SEE ALSO
+
+lintian(1), L<Lintian::Processable>
+
+=cut
+
+1;
+
+# Local Variables:
+# indent-tabs-mode: nil
+# cperl-indent-level: 4
+# End:
+# vim: syntax=perl sw=4 sts=4 sr et
diff --git a/lib/Lintian/Processable/Source/Format.pm b/lib/Lintian/Processable/Source/Format.pm
new file mode 100644
index 0000000..551f93e
--- /dev/null
+++ b/lib/Lintian/Processable/Source/Format.pm
@@ -0,0 +1,136 @@
+# -*- perl -*-
+# Lintian::Processable::Source::Format -- interface to source package data collection
+
+# Copyright (C) 2008 Russ Allbery
+# Copyright (C) 2009 Raphael Geissert
+# Copyright (C) 2020 Felix Lechner
+#
+# 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 <http://www.gnu.org/licenses/>.
+
+package Lintian::Processable::Source::Format;
+
+use v5.20;
+use warnings;
+use utf8;
+
+use Const::Fast;
+use Path::Tiny;
+
+use Moo::Role;
+use namespace::clean;
+
+const my $UNDERSCORE => q{_};
+
+=head1 NAME
+
+Lintian::Processable::Source::Format - Lintian interface to source format
+
+=head1 SYNOPSIS
+
+    my $collect = Lintian::Processable::Source::Format->new;
+
+=head1 DESCRIPTION
+
+Lintian::Processable::Source::Format provides an interface to source format
+information.
+
+=head1 INSTANCE METHODS
+
+=over 4
+
+=item source_format
+
+=cut
+
+has source_format => (
+    is => 'rw',
+    lazy => 1,
+    default => sub {
+        my ($self) = @_;
+
+        my $format = $self->fields->value('Format') || '1.0';
+
+        return $format;
+    }
+);
+
+=item native
+
+Returns true if the source package is native and false otherwise.
+This is generally determined from the source format, though in the 1.0
+case the nativeness is determined by looking for the diff.gz (using
+the name of the source package and its version).
+
+If the source format is 1.0 and the version number is absent, this
+will return false (as native packages are a lot rarer than non-native
+ones).
+
+Note if the source format is missing, it is assumed to be a 1.0
+package.
+
+=cut
+
+has native => (
+    is => 'rw',
+    lazy => 1,
+    default => sub {
+        my ($self) = @_;
+
+        my $format = $self->source_format;
+
+        return 0
+          if $format =~ /^\s*2\.0\s*$/;
+
+        return 0
+          if $format =~ /^\s*3\.0\s+\(quilt|git\)\s*$/;
+
+        return 1
+          if $format =~ /^\s*3\.0\s+\(native\)\s*$/;
+
+        my $version = $self->fields->value('Version');
+        return 0
+          unless length $version;
+
+        # strip epoch
+        $version =~ s/^\d+://;
+
+        my $diffname = $self->name . $UNDERSCORE . "$version.diff.gz";
+
+        return 0
+          if exists $self->files->{$diffname};
+
+        return 1;
+    }
+);
+
+=back
+
+=head1 AUTHOR
+
+Originally written by Russ Allbery <rra@debian.org> for Lintian.
+Amended by Felix Lechner <felix.lechner@lease-up.com> for Lintian.
+
+=head1 SEE ALSO
+
+lintian(1), Lintian::Relation(3)
+
+=cut
+
+1;
+
+# Local Variables:
+# indent-tabs-mode: nil
+# cperl-indent-level: 4
+# End:
+# vim: syntax=perl sw=4 sts=4 sr et
diff --git a/lib/Lintian/Processable/Source/Orig.pm b/lib/Lintian/Processable/Source/Orig.pm
new file mode 100644
index 0000000..dd263f5
--- /dev/null
+++ b/lib/Lintian/Processable/Source/Orig.pm
@@ -0,0 +1,200 @@
+# -*- perl -*- Lintian::Processable::Source::Orig
+#
+# Copyright (C) 2020 Felix Lechner
+#
+# 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 <http://www.gnu.org/licenses/>.
+
+package Lintian::Processable::Source::Orig;
+
+use v5.20;
+use warnings;
+use utf8;
+
+use Const::Fast;
+use List::SomeUtils qw(uniq);
+use List::UtilsBy qw(sort_by);
+use Path::Tiny;
+use Unicode::UTF8 qw(encode_utf8);
+
+use Lintian::Index;
+
+const my $EMPTY => q{};
+const my $SPACE => q{ };
+const my $SLASH => q{/};
+
+use Moo::Role;
+use namespace::clean;
+
+=head1 NAME
+
+Lintian::Processable::Source::Orig - access to collected data about the upstream (orig) sources
+
+=head1 SYNOPSIS
+
+    use Lintian::Processable;
+
+=head1 DESCRIPTION
+
+Lintian::Processable::Source::Orig provides an interface to collected data about the upstream (orig) sources.
+
+=head1 INSTANCE METHODS
+
+=over 4
+
+=item orig
+
+Returns the index for orig.tar.gz.
+
+=cut
+
+my %DECOMPRESS_COMMAND = (
+    'gz' => 'gzip --decompress --stdout',
+    'bz2' => 'bzip2 --decompress --stdout',
+    'xz' => 'xz --decompress --stdout',
+);
+
+has orig => (
+    is => 'rw',
+    lazy => 1,
+    default => sub {
+        my ($self) = @_;
+
+        my $index = Lintian::Index->new;
+        my $archive = $self->basename;
+        $index->identifier("$archive (orig)");
+        $index->basedir($self->basedir . $SLASH . 'orig');
+
+        return $index
+          if $self->native;
+
+        # source packages can be unpacked anywhere; no anchored roots
+        $index->anchored(0);
+
+        my %components = %{$self->components};
+
+        # keep sort order; root is missing below otherwise
+        my @tarballs = sort_by { $components{$_} } keys %components;
+
+        for my $tarball (@tarballs) {
+
+            my $component = $components{$tarball};
+
+            # so far, all archives with components had an extra level
+            my $component_dir = $index->basedir;
+            $component_dir .= $SLASH . $component
+              if length $component;
+
+            my $subindex = Lintian::Index->new;
+            $subindex->basedir($component_dir);
+
+            # source packages can be unpacked anywhere; no anchored roots
+            $index->anchored(0);
+
+            my ($extension) = ($tarball =~ /\.([^.]+)$/);
+            die encode_utf8("Source component $tarball has no file exension\n")
+              unless length $extension;
+
+            my $decompress = $DECOMPRESS_COMMAND{lc $extension};
+            die encode_utf8("Don't know how to decompress $tarball")
+              unless $decompress;
+
+            my @command
+              = (split($SPACE, $decompress),
+                $self->basedir . $SLASH . $tarball);
+
+            my $errors = $subindex->create_from_piped_tar(\@command);
+
+            push(@{$index->unpack_messages}, "$tarball . $_")
+              for grep { !/^tar: Ignoring / } uniq split(/\n/, $errors);
+
+            # treat hard links like regular files
+            my @hardlinks = grep { $_->is_hardlink } @{$subindex->sorted_list};
+            for my $item (@hardlinks) {
+
+                my $target = $subindex->lookup($item->link);
+
+                $item->unpacked_path($target->unpacked_path);
+                $item->size($target->size);
+                $item->link($EMPTY);
+
+                # turn into a regular file
+                my $perm = $item->perm;
+                $perm =~ s/^-/h/;
+                $item->perm($perm);
+
+                $item->path_info(
+                    ($item->path_info & ~Lintian::Index::Item::TYPE_HARDLINK)
+                    | Lintian::Index::Item::TYPE_FILE);
+            }
+
+            my @prefixes = @{$subindex->sorted_list};
+
+            # keep top level prefixes; no trailing slashes
+            s{^([^/]+).*$}{$1}s for @prefixes;
+
+            # squash identical values; ignore root entry ('')
+            my @unique = grep { length } uniq @prefixes;
+
+            # check for single common value
+            if (@unique == 1) {
+
+                # no trailing slash for directories
+                my $common = $unique[0];
+
+                # proceed if no file with that name (lacks slash)
+                my $conflict = $subindex->lookup($common);
+                unless (defined $conflict) {
+
+                    if ($common ne $component || length $component) {
+
+                        # shortens paths; keeps same base directory
+                        my $sub_errors = $subindex->drop_common_prefix;
+
+                        push(@{$index->unpack_errors}, "$tarball . $_")
+                          for uniq split(/\n/, $sub_errors);
+                    }
+                }
+            }
+
+            # lowers base directory to match index being merged into
+            $subindex->capture_common_prefix
+              if length $component;
+
+            $index->merge_in($subindex);
+        }
+
+        return $index;
+    }
+);
+
+=back
+
+=head1 AUTHOR
+
+Originally written by Felix Lechner <felix.lechner@lease-up.com> for
+Lintian.
+
+=head1 SEE ALSO
+
+lintian(1)
+
+=cut
+
+1;
+
+# Local Variables:
+# indent-tabs-mode: nil
+# cperl-indent-level: 4
+# End:
+# vim: syntax=perl sw=4 sts=4 sr et
diff --git a/lib/Lintian/Processable/Source/Overrides.pm b/lib/Lintian/Processable/Source/Overrides.pm
new file mode 100644
index 0000000..d4c446f
--- /dev/null
+++ b/lib/Lintian/Processable/Source/Overrides.pm
@@ -0,0 +1,109 @@
+# -*- perl -*- Lintian::Processable::Source::Overrides
+#
+# Copyright (C) 2019-2021 Felix Lechner
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the Free
+# Software Foundation; either version 2 of the License, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package Lintian::Processable::Source::Overrides;
+
+use v5.20;
+use warnings;
+use utf8;
+
+use List::SomeUtils qw(first_value);
+
+use Moo::Role;
+use namespace::clean;
+
+with 'Lintian::Processable::Overrides';
+
+=head1 NAME
+
+Lintian::Processable::Source::Overrides - access to override data
+
+=head1 SYNOPSIS
+
+    use Lintian::Processable;
+
+=head1 DESCRIPTION
+
+Lintian::Processable::Source::Overrides provides an interface to overrides.
+
+=head1 INSTANCE METHODS
+
+=over 4
+
+=item override_file
+
+=cut
+
+has override_file => (
+    is => 'rw',
+    lazy => 1,
+    default => sub {
+        my ($self) = @_;
+
+        # prefer source/lintian-overrides to source.lintian-overrides
+        my @candidates = (
+            'debian/source/lintian-overrides',
+            'debian/source.lintian-overrides'
+        );
+
+        # pick the first
+        my $override_item= first_value { defined }
+        map { $self->patched->lookup($_) } @candidates;
+
+        return $override_item;
+    }
+);
+
+=item overrides
+
+=cut
+
+has overrides => (
+    is => 'rw',
+    lazy => 1,
+    default => sub {
+        my ($self) = @_;
+
+        return []
+          unless defined $self->override_file;
+
+        my $contents = $self->override_file->decoded_utf8;
+
+        return $self->parse_overrides($contents);
+    }
+);
+
+1;
+
+=back
+
+=head1 AUTHOR
+
+Originally written by Felix Lechner <felix.lechner@lease-up.com> for
+Lintian.
+
+=head1 SEE ALSO
+
+lintian(1)
+
+=cut
+
+# Local Variables:
+# indent-tabs-mode: nil
+# cperl-indent-level: 4
+# End:
+# vim: syntax=perl sw=4 sts=4 sr et
diff --git a/lib/Lintian/Processable/Source/Patched.pm b/lib/Lintian/Processable/Source/Patched.pm
new file mode 100644
index 0000000..229311f
--- /dev/null
+++ b/lib/Lintian/Processable/Source/Patched.pm
@@ -0,0 +1,161 @@
+# -*- perl -*- Lintian::Processable::Source::Patched
+#
+# Copyright (C) 2008 Russ Allbery
+# Copyright (C) 2009 Raphael Geissert
+# Copyright (C) 2020 Felix Lechner
+#
+# 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 <http://www.gnu.org/licenses/>.
+
+package Lintian::Processable::Source::Patched;
+
+use v5.20;
+use warnings;
+use utf8;
+
+use Const::Fast;
+use Cwd;
+use List::SomeUtils qw(uniq);
+use IPC::Run3;
+use Path::Tiny;
+use Unicode::UTF8 qw(encode_utf8 decode_utf8);
+
+use Lintian::Index;
+use Lintian::Index::Item;
+
+const my $COLON => q{:};
+const my $SLASH => q{/};
+const my $NEWLINE => qq{\n};
+
+const my $NO_UMASK => 0000;
+const my $WAIT_STATUS_SHIFT => 8;
+
+use Moo::Role;
+use namespace::clean;
+
+=head1 NAME
+
+Lintian::Processable::Source::Patched - access to sources with Debian patches applied
+
+=head1 SYNOPSIS
+
+    use Lintian::Processable;
+
+=head1 DESCRIPTION
+
+Lintian::Processable::Source::Patched provides an interface to collected data about patched sources.
+
+=head1 INSTANCE METHODS
+
+=over 4
+
+=item patched
+
+Returns a index object representing a patched source tree.
+
+=cut
+
+has patched => (
+    is => 'rw',
+    lazy => 1,
+    default => sub {
+        my ($self) = @_;
+
+        my $index = Lintian::Index->new;
+        my $archive = $self->basename;
+        $index->identifier("$archive (patched)");
+        $index->basedir($self->basedir . $SLASH . 'unpacked');
+
+        # source packages can be unpacked anywhere; no anchored roots
+        $index->anchored(0);
+
+        path($index->basedir)->remove_tree
+          if -d $index->basedir;
+
+        print encode_utf8("N: Using dpkg-source to unpack\n")
+          if $ENV{'LINTIAN_DEBUG'};
+
+        my $saved_umask = umask;
+        umask $NO_UMASK;
+
+        my @unpack_command= (
+            qw(dpkg-source -q --no-check --extract),
+            $self->path, $index->basedir
+        );
+
+        # ignore STDOUT; older versions are not completely quiet with -q
+        my $unpack_errors;
+
+        run3(\@unpack_command, \undef, \undef, \$unpack_errors);
+        my $status = ($? >> $WAIT_STATUS_SHIFT);
+
+        $unpack_errors = decode_utf8($unpack_errors)
+          if length $unpack_errors;
+
+        if ($status) {
+            my $message = "Non-zero status $status from @unpack_command";
+            $message .= $COLON . $NEWLINE . $unpack_errors
+              if length $unpack_errors;
+
+            die encode_utf8($message);
+        }
+
+        umask $saved_umask;
+
+        my $index_errors = $index->create_from_basedir;
+
+        my $savedir = getcwd;
+        chdir($index->basedir)
+          or die encode_utf8('Cannot change to directory ' . $index->basedir);
+
+        # fix permissions
+        my @permissions_command
+          = ('chmod', '-R', 'u+rwX,o+rX,o-w', $index->basedir);
+        my $permissions_errors;
+
+        run3(\@permissions_command, \undef, \undef, \$permissions_errors);
+
+        $permissions_errors = decode_utf8($permissions_errors)
+          if length $permissions_errors;
+
+        chdir($savedir)
+          or die encode_utf8("Cannot change to directory $savedir");
+
+        my @messages = grep { !/^tar: Ignoring / }
+          split(/\n/, $unpack_errors . $index_errors . $permissions_errors);
+        push(@{$index->unpack_messages}, @messages);
+
+        return $index;
+    }
+);
+
+=back
+
+=head1 AUTHOR
+
+Originally written by Felix Lechner <felix.lechner@lease-up.com> for
+Lintian.
+
+=head1 SEE ALSO
+
+lintian(1)
+
+=cut
+
+1;
+
+# Local Variables:
+# indent-tabs-mode: nil
+# cperl-indent-level: 4
+# End:
+# vim: syntax=perl sw=4 sts=4 sr et
diff --git a/lib/Lintian/Processable/Source/Relation.pm b/lib/Lintian/Processable/Source/Relation.pm
new file mode 100644
index 0000000..e66297c
--- /dev/null
+++ b/lib/Lintian/Processable/Source/Relation.pm
@@ -0,0 +1,267 @@
+# -*- perl -*-
+# Lintian::Processable::Source::Relation -- interface to source package data collection
+
+# Copyright (C) 2008 Russ Allbery
+# Copyright (C) 2009 Raphael Geissert
+# Copyright (C) 2020 Felix Lechner
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the Free
+# Software Foundation; either version 2 of the License, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package Lintian::Processable::Source::Relation;
+
+use v5.20;
+use warnings;
+use utf8;
+
+use Carp qw(croak);
+use Unicode::UTF8 qw(encode_utf8);
+
+use Lintian::Relation;
+
+use Moo::Role;
+use namespace::clean;
+
+=head1 NAME
+
+Lintian::Processable::Source::Relation - Lintian interface to source package data collection
+
+=head1 SYNOPSIS
+
+    my ($name, $type, $dir) = ('foobar', 'source', '/path/to/lab-entry');
+    my $collect = Lintian::Processable::Source::Relation->new($name);
+    if ($collect->native) {
+        print encode_utf8("Package is native\n");
+    }
+
+=head1 DESCRIPTION
+
+Lintian::Processable::Source::Relation provides an interface to package data for source
+packages.  It implements data collection methods specific to source
+packages.
+
+This module is in its infancy.  Most of Lintian still reads all data from
+files in the laboratory whenever that data is needed and generates that
+data via collect scripts.  The goal is to eventually access all data about
+source packages via this module so that the module can cache data where
+appropriate and possibly retire collect scripts in favor of caching that
+data in memory.
+
+=head1 INSTANCE METHODS
+
+=over 4
+
+=item binary_relation (PACKAGE, FIELD)
+
+Returns a L<Lintian::Relation> object for the specified FIELD in the
+binary package PACKAGE in the F<debian/control> file.  FIELD should be
+one of the possible relationship fields of a Debian package or one of
+the following special values:
+
+=over 4
+
+=item All
+
+The concatenation of Pre-Depends, Depends, Recommends, and Suggests.
+
+=item Strong
+
+The concatenation of Pre-Depends and Depends.
+
+=item Weak
+
+The concatenation of Recommends and Suggests.
+
+=back
+
+If FIELD isn't present in the package, the returned Lintian::Relation
+object will be empty (present but satisfies nothing).
+
+Any substvars in F<debian/control> will be represented in the returned
+relation as packages named after the substvar.
+
+=item saved_binary_relations
+
+=cut
+
+has saved_binary_relations => (
+    is => 'rw',
+    coerce => sub { my ($hashref) = @_; return ($hashref // {}); },
+    default => sub { {} }
+);
+
+my %alias = (
+    all    => [qw(Pre-Depends Depends Recommends Suggests)],
+    strong => [qw(Pre-Depends Depends)],
+    weak   => [qw(Recommends Suggests)]
+);
+
+my %known = map { $_ => 1 }
+  qw(pre-depends depends recommends suggests enhances breaks
+  conflicts provides replaces);
+
+sub binary_relation {
+    my ($self, $package, $name) = @_;
+
+    return undef
+      unless length $name;
+
+    my $lowercase = lc $name;
+
+    return undef
+      unless length $package;
+
+    my $relation = $self->saved_binary_relations->{$package}{$lowercase};
+    unless (defined $relation) {
+
+        if (length $alias{$lowercase}) {
+            $relation
+              = Lintian::Relation->new->logical_and(
+                map { $self->binary_relation($package, $_) }
+                  @{ $alias{$lowercase} });
+
+        } else {
+            croak encode_utf8("unknown relation field $name")
+              unless $known{$lowercase};
+
+            my $value
+              = $self->debian_control->installable_fields($package)
+              ->value($name);
+            $relation = Lintian::Relation->new->load($value);
+        }
+
+        $self->saved_binary_relations->{$package}{$lowercase} = $relation;
+    }
+
+    return $relation;
+}
+
+=item relation (FIELD)
+
+Returns a L<Lintian::Relation> object for the given build relationship
+field FIELD.  In addition to the normal build relationship fields, the
+following special field names are supported:
+
+=over 4
+
+=item Build-Depends-All
+
+The concatenation of Build-Depends, Build-Depends-Arch and
+Build-Depends-Indep.
+
+=item Build-Conflicts-All
+
+The concatenation of Build-Conflicts, Build-Conflicts-Arch and
+Build-Conflicts-Indep.
+
+=back
+
+If FIELD isn't present in the package, the returned Lintian::Relation
+object will be empty (present but satisfies nothing).
+
+=item saved_relation
+
+=cut
+
+has saved_relations => (
+    is => 'rw',
+    coerce => sub { my ($hashref) = @_; return ($hashref // {}); },
+    default => sub { {} }
+);
+
+sub relation {
+    my ($self, $name) = @_;
+
+    return undef
+      unless length $name;
+
+    my $lowercase = lc $name;
+
+    my $relation = $self->saved_relations->{$lowercase};
+    unless (defined $relation) {
+
+        if ($name =~ /^Build-(Depends|Conflicts)-All$/i) {
+            my $type = $1;
+            my @fields
+              = ("Build-$type", "Build-$type-Indep", "Build-$type-Arch");
+            $relation
+              = Lintian::Relation->new->logical_and(map { $self->relation($_) }
+                  @fields);
+
+        } elsif ($name =~ /^Build-(Depends|Conflicts)(?:-(?:Arch|Indep))?$/i){
+            my $value = $self->fields->value($name);
+            $relation = Lintian::Relation->new->load($value);
+
+        } else {
+            croak encode_utf8("unknown relation field $name");
+        }
+
+        $self->saved_relations->{$lowercase} = $relation;
+    }
+
+    return $relation;
+}
+
+=item relation_norestriction (FIELD)
+
+The same as L</relation (FIELD)>, but ignores architecture
+restrictions and build profile restrictions in the FIELD field.
+
+=item saved_relations_norestriction
+
+=cut
+
+has saved_relations_norestriction => (
+    is => 'rw',
+    coerce => sub { my ($hashref) = @_; return ($hashref // {}); },
+    default => sub { {} }
+);
+
+sub relation_norestriction {
+    my ($self, $name) = @_;
+
+    return undef
+      unless length $name;
+
+    my $lowercase = lc $name;
+
+    my $relation = $self->saved_relations_norestriction->{$lowercase};
+    unless (defined $relation) {
+
+        $relation = $self->relation($name)->restriction_less;
+        $self->saved_relations_norestriction->{$lowercase} = $relation;
+    }
+
+    return $relation;
+}
+
+=back
+
+=head1 AUTHOR
+
+Originally written by Russ Allbery <rra@debian.org> for Lintian.
+Amended by Felix Lechner <felix.lechner@lease-up.com> for Lintian.
+
+=head1 SEE ALSO
+
+lintian(1)
+
+=cut
+
+1;
+
+# Local Variables:
+# indent-tabs-mode: nil
+# cperl-indent-level: 4
+# End:
+# vim: syntax=perl sw=4 sts=4 sr et
diff --git a/lib/Lintian/Processable/Source/Repacked.pm b/lib/Lintian/Processable/Source/Repacked.pm
new file mode 100644
index 0000000..4cf057b
--- /dev/null
+++ b/lib/Lintian/Processable/Source/Repacked.pm
@@ -0,0 +1,99 @@
+# -*- perl -*-
+# Lintian::Processable::Source::Repacked -- interface to source package data collection
+
+# Copyright (C) 2008 Russ Allbery
+# Copyright (C) 2009 Raphael Geissert
+# Copyright (C) 2020 Felix Lechner
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the Free
+# Software Foundation; either version 2 of the License, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package Lintian::Processable::Source::Repacked;
+
+use v5.20;
+use warnings;
+use utf8;
+
+use Lintian::Util qw($PKGREPACK_REGEX);
+
+use Moo::Role;
+use namespace::clean;
+
+=head1 NAME
+
+Lintian::Processable::Source::Repacked - Lintian interface to source package data collection
+
+=head1 SYNOPSIS
+
+    my ($name, $type, $dir) = ('foobar', 'source', '/path/to/lab-entry');
+    my $collect = Lintian::Processable::Source::Repacked->new($name);
+    if ($collect->native) {
+        print encode_utf8("Package is native\n");
+    }
+
+=head1 DESCRIPTION
+
+Lintian::Processable::Source::Repacked provides an interface to package data for source
+packages.  It implements data collection methods specific to source
+packages.
+
+This module is in its infancy.  Most of Lintian still reads all data from
+files in the laboratory whenever that data is needed and generates that
+data via collect scripts.  The goal is to eventually access all data about
+source packages via this module so that the module can cache data where
+appropriate and possibly retire collect scripts in favor of caching that
+data in memory.
+
+=head1 INSTANCE METHODS
+
+=over 4
+
+=item repacked
+
+Returns true if the source package has been "repacked" and false otherwise.
+This is determined from the version name containing "dfsg" or similar.
+
+=cut
+
+has repacked => (
+    is => 'rw',
+    lazy => 1,
+    default => sub {
+        my ($self) = @_;
+
+        my $upstream = $self->changelog_version->upstream;
+
+        return $upstream =~ $PKGREPACK_REGEX;
+    }
+);
+
+=back
+
+=head1 AUTHOR
+
+Originally written by Russ Allbery <rra@debian.org> for Lintian.
+Amended by Felix Lechner <felix.lechner@lease-up.com> for Lintian.
+
+=head1 SEE ALSO
+
+lintian(1)
+
+=cut
+
+1;
+
+# Local Variables:
+# indent-tabs-mode: nil
+# cperl-indent-level: 4
+# End:
+# vim: syntax=perl sw=4 sts=4 sr et