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-rw-r--r--lib/Lintian/Check/Files/SymbolicLinks/Broken.pm119
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diff --git a/lib/Lintian/Check/Files/SymbolicLinks/Broken.pm b/lib/Lintian/Check/Files/SymbolicLinks/Broken.pm
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+# files/symbolic-links/broken -- lintian check script -*- perl -*-
+#
+# Copyright (C) 2011 Niels Thykier
+#
+# 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::SymbolicLinks::Broken;
+
+use v5.20;
+use warnings;
+use utf8;
+
+use Const::Fast;
+use File::Basename qw(dirname);
+use List::SomeUtils qw(any);
+
+use Moo;
+use namespace::clean;
+
+with 'Lintian::Check';
+
+const my $EMPTY => q{};
+const my $ASTERISK => q{*};
+
+has wildcard_links => (is => 'rw', default => sub{ [] });
+
+sub visit_installed_files {
+ my ($self, $item) = @_;
+
+ return
+ unless $item->is_symlink;
+
+ # target relative to the package root
+ my $path = $item->link_normalized;
+
+ # unresolvable link
+ unless (defined $path) {
+
+ $self->pointed_hint('package-contains-unsafe-symlink', $item->pointer);
+ return;
+ }
+
+ # will always have links to the package root (although
+ # self-recursive and possibly not very useful)
+ return
+ if $path eq $EMPTY;
+
+ # If it contains a "*" it probably a bad
+ # ln -s target/*.so link expansion. We do not bother looking
+ # for other broken symlinks as people keep adding new special
+ # cases and it is not worth it.
+ push(@{$self->wildcard_links}, $item)
+ if index($item->link, $ASTERISK) >= 0;
+
+ return;
+}
+
+sub installable {
+ my ($self) = @_;
+
+ return
+ unless @{$self->wildcard_links};
+
+ # get prerequisites from same source package
+ my @prerequisites
+ = @{$self->group->direct_dependencies($self->processable)};
+
+ for my $item (@{$self->wildcard_links}){
+
+ # target relative to the package root
+ my $path = $item->link_normalized;
+
+ # destination is in the package
+ next
+ if $self->processable->installed->lookup($path)
+ || $self->processable->installed->lookup("$path/");
+
+ # does the link point to any prerequisites in same source package
+ next
+ if
+ any {$_->installed->lookup($path) || $_->installed->lookup("$path/")}
+ @prerequisites;
+
+ # link target
+ my $target = $item->link;
+
+ # strip leading slashes for reporting
+ $target =~ s{^/+}{};
+
+ # nope - not found in any of our direct dependencies. Ergo it is
+ # a broken "ln -s target/*.so link" expansion.
+ $self->pointed_hint('package-contains-broken-symlink-wildcard',
+ $item->pointer, $target);
+ }
+
+ return;
+}
+
+1;
+
+# Local Variables:
+# indent-tabs-mode: nil
+# cperl-indent-level: 4
+# End:
+# vim: syntax=perl sw=4 sts=4 sr et