117 lines
2.4 KiB
Perl
117 lines
2.4 KiB
Perl
# Copyright © 1998 Richard Braakman
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# Copyright © 1999 Darren Benham
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# Copyright © 2000 Sean 'Shaleh' Perry
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# Copyright © 2004 Frank Lichtenheld
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# Copyright © 2006 Russ Allbery
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# Copyright © 2007-2009 Raphaël Hertzog <hertzog@debian.org>
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# Copyright © 2008-2009, 2012-2014 Guillem Jover <guillem@debian.org>
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#
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# This program is free software; you may redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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=encoding utf8
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=head1 NAME
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Dpkg::Deps::Union - list of unrelated dependencies
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=head1 DESCRIPTION
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This class represents a list of relationships.
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It inherits from L<Dpkg::Deps::Multiple>.
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=cut
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package Dpkg::Deps::Union 1.00;
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use strict;
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use warnings;
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use parent qw(Dpkg::Deps::Multiple);
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=head1 METHODS
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=over 4
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=item $dep->output([$fh])
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The output() method uses ", " to join the list of relationships.
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=cut
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sub output {
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my ($self, $fh) = @_;
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my $res = join(', ', map {
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$_->output()
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} grep {
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not $_->is_empty()
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} $self->get_deps());
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if (defined $fh) {
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print { $fh } $res;
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}
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return $res;
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}
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=item $dep->implies($other_dep)
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=item $dep->get_evaluation($other_dep)
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These methods are not meaningful for this object and always return undef.
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=cut
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sub implies {
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# Implication test is not useful on Union.
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return;
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}
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sub get_evaluation {
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# Evaluation is not useful on Union.
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return;
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}
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=item $dep->simplify_deps($facts)
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The simplification is done to generate an union of all the relationships.
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It uses $simple_dep->merge_union($other_dep) to get its job done.
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=cut
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sub simplify_deps {
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my ($self, $facts) = @_;
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my @new;
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WHILELOOP:
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while (@{$self->{list}}) {
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my $odep = shift @{$self->{list}};
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foreach my $dep (@new) {
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next WHILELOOP if $dep->merge_union($odep);
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}
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push @new, $odep;
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}
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$self->{list} = [ @new ];
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}
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=back
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=head1 CHANGES
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=head2 Version 1.00 (dpkg 1.15.6)
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Mark the module as public.
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=cut
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1;
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