1 files changed, 119 insertions, 0 deletions
diff --git a/lib/Lintian/Check/Files/SymbolicLinks/Broken.pm b/lib/Lintian/Check/Files/SymbolicLinks/Broken.pm
new file mode 100644
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--- /dev/null
+++ b/lib/Lintian/Check/Files/SymbolicLinks/Broken.pm
@@ -0,0 +1,119 @@
+# 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