1 files changed, 74 insertions, 0 deletions
diff --git a/lib/Lintian/Check/Debian/Control/Prerequisite/Circular.pm b/lib/Lintian/Check/Debian/Control/Prerequisite/Circular.pm
new file mode 100644
index 0000000..7cd78e5
--- /dev/null
+++ b/lib/Lintian/Check/Debian/Control/Prerequisite/Circular.pm
@@ -0,0 +1,74 @@
+# debian/control/prerequisite/circular -- lintian check script -*- perl -*-
+#
+# Copyright (C) 2004 Marc Brockschmidt
+# Copyright (C) 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::Debian::Control::Prerequisite::Circular;
+
+use v5.20;
+use warnings;
+use utf8;
+
+use Moo;
+use namespace::clean;
+
+with 'Lintian::Check';
+
+sub source {
+    my ($self) = @_;
+
+    my $control = $self->processable->debian_control;
+
+    my @prerequisite_fields = qw(Pre-Depends Depends Recommends Suggests);
+
+    for my $installable ($control->installables) {
+        my $installable_fields = $control->installable_fields($installable);
+
+        for my $field (@prerequisite_fields) {
+
+            next
+              unless $control->installable_fields($installable)
+              ->declares($field);
+
+            my $relation
+              = $self->processable->binary_relation($installable, $field);
+
+            my $control_item= $self->processable->debian_control->item;
+            my $position = $installable_fields->position($field);
+            my $pointer = $control_item->pointer($position);
+
+            $self->pointed_hint(
+                'circular-installation-prerequisite',
+                $pointer, "(in section for $installable)",
+                $field,$relation->to_string
+            )if $relation->satisfies($installable);
+        }
+    }
+
+    return;
+}
+
+1;
+
+# Local Variables:
+# indent-tabs-mode: nil
+# cperl-indent-level: 4
+# End:
+# vim: syntax=perl sw=4 sts=4 sr et