1 files changed, 98 insertions, 0 deletions
diff --git a/lib/Lintian/Check/Debian/Watch/Standard.pm b/lib/Lintian/Check/Debian/Watch/Standard.pm
new file mode 100644
index 0000000..129966d
--- /dev/null
+++ b/lib/Lintian/Check/Debian/Watch/Standard.pm
@@ -0,0 +1,98 @@
+# debian/watch/standard -- 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::Watch::Standard;
+
+use v5.20;
+use warnings;
+use utf8;
+
+use Const::Fast;
+use List::Compare;
+use List::Util qw(max);
+
+use Moo;
+use namespace::clean;
+
+with 'Lintian::Check';
+
+const my $SPACE => q{ };
+
+const my @STANDARDS => (2, 3, 4);
+const my $NEWLY_SUPERSEEDED => 3;
+
+sub visit_patched_files {
+    my ($self, $item) = @_;
+
+    return
+      unless $item->name eq 'debian/watch';
+
+    my $contents = $item->bytes;
+    return
+      unless length $contents;
+
+    # look for version
+    my @mentioned = ($contents =~ /^ version \s* = \s* (\d+) \s* $/gmsx);
+
+    my $has_contents = !!($contents =~ m{^ \s* [^#] }gmx);
+
+    if ($has_contents && !@mentioned) {
+
+        $self->pointed_hint('missing-debian-watch-file-standard',
+            $item->pointer);
+        return;
+    }
+
+    $self->pointed_hint('multiple-debian-watch-file-standards',
+        $item->pointer,join($SPACE, @mentioned))
+      if @mentioned > 1;
+
+    my $standard_lc = List::Compare->new(\@mentioned, \@STANDARDS);
+    my @unknown = $standard_lc->get_Lonly;
+    my @known = $standard_lc->get_intersection;
+
+    $self->pointed_hint('unknown-debian-watch-file-standard',
+        $item->pointer, $_)
+      for @unknown;
+
+    return
+      unless @known;
+
+    my $highest = max(@known);
+    $self->pointed_hint('debian-watch-file-standard', $item->pointer,$highest);
+
+    $self->pointed_hint('older-debian-watch-file-standard',
+        $item->pointer, $highest)
+      if $highest == $NEWLY_SUPERSEEDED;
+
+    $self->pointed_hint('obsolete-debian-watch-file-standard',
+        $item->pointer, $highest)
+      if $highest < $NEWLY_SUPERSEEDED;
+
+    return;
+}
+
+1;
+
+# Local Variables:
+# indent-tabs-mode: nil
+# cperl-indent-level: 4
+# End:
+# vim: syntax=perl sw=4 sts=4 sr et