1 files changed, 105 insertions, 0 deletions
diff --git a/lib/Lintian/Check/Debian/Patches/Dep3.pm b/lib/Lintian/Check/Debian/Patches/Dep3.pm
new file mode 100644
index 0000000..6624a0c
--- /dev/null
+++ b/lib/Lintian/Check/Debian/Patches/Dep3.pm
@@ -0,0 +1,105 @@
+# debian/patches/dep3 -- lintian check script -*- perl -*-
+
+# 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, you can find it on the World Wide
+# Web at https://www.gnu.org/copyleft/gpl.html, or write to the Free
+# Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+# MA 02110-1301, USA.
+
+package Lintian::Check::Debian::Patches::Dep3;
+
+use v5.20;
+use warnings;
+use utf8;
+
+use Const::Fast;
+use List::SomeUtils qw(any none);
+use Syntax::Keyword::Try;
+use Unicode::UTF8 qw(valid_utf8 decode_utf8);
+
+use Lintian::Deb822;
+
+const my $EMPTY => q{};
+
+use Moo;
+use namespace::clean;
+
+with 'Lintian::Check';
+
+sub visit_patched_files {
+    my ($self, $item) = @_;
+
+    return
+      unless $item->name =~ m{^debian/patches/};
+
+    return
+      unless $item->is_file;
+
+    return
+      if $item->name eq 'debian/patches/series'
+      || $item->name eq 'debian/patches/README';
+
+    my $bytes = $item->bytes;
+    return
+      unless length $bytes;
+
+    my ($headerbytes) = split(/^---/m, $bytes, 2);
+
+    return
+      unless valid_utf8($headerbytes);
+
+    my $header = decode_utf8($headerbytes);
+    return
+      unless length $header;
+
+    my $deb822 = Lintian::Deb822->new;
+
+    my @sections;
+    try {
+        @sections = $deb822->parse_string($header);
+
+    } catch {
+        return;
+    }
+
+    return
+      unless @sections;
+
+    # use last mention when present multiple times
+    my $origin = $deb822->last_mention('Origin');
+
+    my ($category) = split(m{\s*,\s*}, $origin, 2);
+    $category //= $EMPTY;
+    return
+      if any { $category eq $_ } qw(upstream backport);
+
+    $self->pointed_hint('patch-not-forwarded-upstream', $item->pointer)
+      if $deb822->last_mention('Forwarded') eq 'no'
+      || none { length } (
+        $deb822->last_mention('Applied-Upstream'),
+        $deb822->last_mention('Bug'),
+        $deb822->last_mention('Forwarded')
+      );
+
+    return;
+}
+
+1;
+
+# Local Variables:
+# indent-tabs-mode: nil
+# cperl-indent-level: 4
+# End:
+# vim: syntax=perl sw=4 sts=4 sr et