1 files changed, 150 insertions, 0 deletions
diff --git a/lib/Lintian/Check/Files/Contents.pm b/lib/Lintian/Check/Files/Contents.pm
new file mode 100644
index 0000000..472c419
--- /dev/null
+++ b/lib/Lintian/Check/Files/Contents.pm
@@ -0,0 +1,150 @@
+# files/contents -- lintian check script -*- perl -*-
+
+# Copyright (C) 1998 Christian Schwarz and Richard Braakman
+# Copyright (C) 2019 Chris Lamb <lamby@debian.org>
+# 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::Files::Contents;
+
+use v5.20;
+use warnings;
+use utf8;
+
+use Const::Fast;
+use List::SomeUtils qw(any);
+
+use Moo;
+use namespace::clean;
+
+with 'Lintian::Check';
+
+const my $EMPTY => q{};
+const my $SLASH => q{/};
+const my $ARROW => q{ -> };
+
+my $SENSIBLE_REGEX
+  = qr{(?<!-)(?:select-editor|sensible-(?:browser|editor|pager))\b};
+
+# with this Moo default, maintainer scripts are also checked
+has switched_locations => (
+    is => 'rw',
+    lazy => 1,
+    default => sub {
+        my ($self) = @_;
+
+        my @files
+          = grep { $_->is_file } @{$self->processable->installed->sorted_list};
+
+        my @commands = grep { $_->name =~ m{^(?:usr/)?s?bin/} } @files;
+
+        my %switched_locations;
+        for my $command (@commands) {
+
+            my @variants = map { $_ . $SLASH . $command->basename }
+              qw(bin sbin usr/bin usr/sbin);
+            my @confused = grep { $_ ne $command->name } @variants;
+
+            $switched_locations{$_} = $command->name for @confused;
+        }
+
+        return \%switched_locations;
+    }
+);
+
+sub build_path {
+    my ($self) = @_;
+
+    my $buildinfo = $self->group->buildinfo;
+
+    return $EMPTY
+      unless $buildinfo;
+
+    return $buildinfo->fields->value('Build-Path');
+}
+
+sub check_item {
+    my ($self, $item) = @_;
+
+    return
+      unless $item->is_file;
+
+    unless ($self->processable->relation('all')->satisfies('sensible-utils')
+        || $self->processable->source_name eq 'sensible-utils') {
+
+        my $sensible = $item->mentions_in_operation($SENSIBLE_REGEX);
+        $self->pointed_hint('missing-depends-on-sensible-utils',
+            $item->pointer, $sensible)
+          if length $sensible;
+    }
+
+    unless ($self->processable->fields->value('Section') eq 'debian-installer'
+        || any { $_ eq $self->processable->source_name } qw(base-files dpkg)) {
+
+        $self->pointed_hint('uses-dpkg-database-directly', $item->pointer)
+          if length $item->mentions_in_operation(qr{/var/lib/dpkg});
+    }
+
+    # if we have a /usr/sbin/foo, check for references to /usr/bin/foo
+    my %switched_locations = %{$self->switched_locations};
+    for my $confused (keys %switched_locations) {
+
+  # may not work as expected on ELF due to ld's SHF_MERGE
+  # but word boundaries are also superior in strings spanning multiple commands
+        my $correct = $switched_locations{$confused};
+        $self->pointed_hint('bin-sbin-mismatch', $item->pointer,
+            $confused . $ARROW . $correct)
+          if length $item->mentions_in_operation(qr{ \B / \Q$confused\E \b }x);
+    }
+
+    if (length $self->build_path) {
+        my $escaped_path = quotemeta($self->build_path);
+        $self->pointed_hint('file-references-package-build-path',
+            $item->pointer)
+          if $item->bytes_match(qr{$escaped_path});
+    }
+
+    return;
+}
+
+sub visit_installed_files {
+    my ($self, $item) = @_;
+
+    $self->check_item($item);
+
+    return;
+}
+
+sub visit_control_files {
+    my ($self, $item) = @_;
+
+    return
+      unless $item->is_maintainer_script;
+
+    $self->check_item($item);
+
+    return;
+}
+
+1;
+
+# Local Variables:
+# indent-tabs-mode: nil
+# cperl-indent-level: 4
+# End:
+# vim: syntax=perl sw=4 sts=4 sr et