1 files changed, 88 insertions, 0 deletions
diff --git a/lib/Lintian/Check/Languages/Python/BogusPrerequisites.pm b/lib/Lintian/Check/Languages/Python/BogusPrerequisites.pm
new file mode 100644
index 0000000..fe2df7f
--- /dev/null
+++ b/lib/Lintian/Check/Languages/Python/BogusPrerequisites.pm
@@ -0,0 +1,88 @@
+# languages/python/bogus-prerequisites -- 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::Languages::Python::BogusPrerequisites;
+
+use v5.20;
+use warnings;
+use utf8;
+
+use Moo;
+use namespace::clean;
+
+with 'Lintian::Check';
+
+sub installable {
+    my ($self) = @_;
+
+    $self->what_is_python($self->processable->source_name,
+        qw{Depends Pre-Depends Recommends});
+
+    return;
+}
+
+sub source {
+    my ($self) = @_;
+
+    $self->what_is_python($self->processable->name,
+        qw{Build-Depends Build-Depends-Indep Build-Depends-Arch});
+
+    return;
+}
+
+sub what_is_python {
+    my ($self, $source, @fields) = @_;
+
+    # see Bug#973011
+    my @WHAT_IS_PYTHON = qw(
+      python-is-python2:any
+      python-dev-is-python2:any
+      python-is-python3:any
+      python-dev-is-python3:any
+    );
+
+    my %BOGUS_PREREQUISITES;
+
+    unless ($source eq 'what-is-python') {
+
+        for my $unwanted (@WHAT_IS_PYTHON) {
+
+            $BOGUS_PREREQUISITES{$unwanted}
+              = [grep {$self->processable->relation($_)->satisfies($unwanted)}
+                  @fields];
+        }
+    }
+
+    for my $unwanted (keys %BOGUS_PREREQUISITES) {
+
+        $self->hint('bogus-python-prerequisite', $_, "(satisfies $unwanted)")
+          for @{$BOGUS_PREREQUISITES{$unwanted}};
+    }
+
+    return;
+}
+
+1;
+
+# Local Variables:
+# indent-tabs-mode: nil
+# cperl-indent-level: 4
+# End:
+# vim: syntax=perl sw=4 sts=4 sr et