1 files changed, 74 insertions, 0 deletions
diff --git a/lib/Lintian/Check/Languages/R.pm b/lib/Lintian/Check/Languages/R.pm
new file mode 100644
index 0000000..daa8462
--- /dev/null
+++ b/lib/Lintian/Check/Languages/R.pm
@@ -0,0 +1,74 @@
+# Copyright (C) 1998 Christian Schwarz and Richard Braakman
+# Copyright (C) 1999 Joey Hess
+# Copyright (C) 2000 Sean 'Shaleh' Perry
+# Copyright (C) 2002 Josip Rodin
+# Copyright (C) 2007 Russ Allbery
+# Copyright (C) 2013-2018 Bastien ROUCARIES
+# Copyright (C) 2017-2020 Chris Lamb <lamby@debian.org>
+# Copyright (C) 2020-2021 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, 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::Languages::R;
+
+use v5.20;
+use warnings;
+use utf8;
+
+use Const::Fast;
+
+const my $RDATA_MAGIC_LENGTH => 4;
+
+use Moo;
+use namespace::clean;
+
+with 'Lintian::Check';
+
+sub visit_patched_files {
+    my ($self, $item) = @_;
+
+    return
+      unless $item->is_file;
+
+    # Ensure we have a README.source for R data files
+    if (   $item->basename =~ /\.(?:rda|Rda|rdata|Rdata|RData)$/
+        && $item->is_open_ok
+        && $item->file_type =~ /gzip compressed data/
+        && !$self->processable->patched->resolve_path('debian/README.source')){
+
+        open(my $fd, '<:gzip', $item->unpacked_path)
+          or die encode_utf8('Cannot open ' . $item->unpacked_path);
+
+        read($fd, my $magic, $RDATA_MAGIC_LENGTH)
+          or die encode_utf8('Cannot read from ' . $item->unpacked_path);
+
+        close($fd);
+
+        $self->pointed_hint('r-data-without-readme-source', $item->pointer)
+          if $magic eq 'RDX2';
+    }
+
+    return;
+}
+
+1;
+
+# Local Variables:
+# indent-tabs-mode: nil
+# cperl-indent-level: 4
+# End:
+# vim: syntax=perl sw=4 sts=4 sr et