/usr/share/perl5/Algorithm/Dependency/Source/Invert.pm is in libalgorithm-dependency-perl 1.110-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 | package Algorithm::Dependency::Source::Invert;
=pod
=head1 NAME
Algorithm::Dependency::Source::Invert - Logically invert a source
=head1 SYNOPSIS
my $inverted = Algorithm::Dependency::Source::Invert->new( $source );
=head1 DESCRIPTION
This class creates a source from another source, but with all dependencies
reversed.
=cut
use 5.005;
use strict;
use Params::Util '_INSTANCE';
use Algorithm::Dependency::Source::HoA ();
use vars qw{$VERSION @ISA};
BEGIN {
$VERSION = '1.110';
@ISA = 'Algorithm::Dependency::Source::HoA';
}
#####################################################################
# Constructor
sub new {
my $class = shift;
my $source = _INSTANCE(shift, 'Algorithm::Dependency::Source') or return undef;
# Derive a HoA from the original source
my @items = $source->items;
my %hoa = map { $_->id => [ ] } @items;
foreach my $item ( @items ) {
my $id = $item->id;
my @deps = $item->depends;
foreach my $dep ( @deps ) {
push @{ $hoa{$dep} }, $id;
}
}
# Hand off to the parent class
$class->SUPER::new( \%hoa );
}
1;
=pod
=head1 SUPPORT
To file a bug against this module, use the CPAN bug tracking system
L<http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Algorithm-Dependency>
For other comments, contact the author.
=head1 AUTHOR
Adam Kennedy <adamk@cpan.org>
=head1 SEE ALSO
L<Algorithm::Dependency::Source>, L<Algorithm::Dependency::Source::HoA>
=head1 COPYRIGHT
Copyright 2003 - 2009 Adam Kennedy.
This program is free software; you can redistribute
it and/or modify it under the same terms as Perl itself.
The full text of the license can be found in the
LICENSE file included with this module.
=cut
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