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package Debian::Copyright::Stanza::OrSeparated; |
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require v5.10.1; |
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use strict; |
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use warnings; |
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use Array::Unique; |
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use Text::ParseWords qw(quotewords); |
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use overload |
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'""' => \&as_string, |
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'eq' => \= |
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our $VERSION = '0.2'; |
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=head1 NAME |
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Debian::Copyright::Stanza::OrSeparated - 'or' separated field abstraction |
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=head1 VERSION |
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This document describes Debian::Copyright::Stanza::OrSeparated version 0.2 . |
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=cut |
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=head1 SYNOPSIS |
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my $f = Debian::Copyright::Stanza::OrSeparated->new('Artistic'); |
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$f->add('GPL-1+ or BSD'); |
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print $f->as_string; |
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# 'Artistic or GPL-1+ or BSD' |
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print "$f"; # the same |
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$f->sort; |
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=head1 DESCRIPTION |
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Debian::Copyright::Stanza::OrSeparated abstracts handling of the License |
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fields in Files blocks, which are lists separated by 'or'. It also supports |
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a body field representing the optional extended description of a License field. |
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=head1 CONSTRUCTOR |
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=head2 new (initial values) |
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The initial values list is parsed and may contain strings that are in fact |
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'or'-separated lists. These are split appropriately using L' |
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C routine. |
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=cut |
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sub new { |
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my $self = bless {list=>[],body=>""}, shift; |
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tie @{$self->{list}}, 'Array::Unique'; |
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my $body = exists $self->{body} ? $self->{body} : ""; |
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my @list = (); |
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foreach my $e (@_) { |
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if ($e =~ m{\A([^\n]+)\n(.+)\z}xms) { |
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push @list, $1; |
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$body .= $2; |
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} |
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else { |
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push @list, $e; |
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} |
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} |
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$self->add(@list) if @list; |
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$self->{body} = $body if $body; |
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$self; |
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} |
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=head1 METHODS |
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=head2 as_string |
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Returns text representation of the list. A simple join of the elements by |
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C< or >. The same function is used for overloading the stringification |
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operation. |
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=cut |
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sub as_string |
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{ |
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my $self = shift; |
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my $body = exists $self->{body} ? "\n$self->{body}" : ""; |
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return join( ' or ', @{ $self->{list} } ).$body; |
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} |
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=head2 equals |
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Natural implementation of the equality function. |
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=cut |
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sub equals |
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{ |
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my @args = map { ref $_ ? $_->as_string : $_ } @_; |
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return $args[0] eq $args[1]; |
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} |
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sub _parse { |
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my $self = shift; |
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my @output; |
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for (@_) { |
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my @items = quotewords( qr/\s+or\s+/, 1, $_ ); |
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push @output, @items; |
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} |
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return @output; |
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} |
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=head2 add I<@items> |
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Adds the given items to the list. Items that are already present are not added, |
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keeping the list unique. |
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=cut |
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sub add { |
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my ( $self, @items) = @_; |
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push @{$self->{list}}, $self->_parse(@items); |
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} |
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=head2 sort |
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A handy method for sorting the list. |
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=cut |
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sub sort { |
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my $self = shift; |
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@{$self->{list}} = sort @{$self->{list}}; |
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} |
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=head1 COPYRIGHT & LICENSE |
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Copyright (C) 2011-12 Nicholas Bamber L |
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This program is free software; you can redistribute it and/or modify it under |
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the terms of the GNU General Public License version 2 as published by the Free |
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Software Foundation. |
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This program is distributed in the hope that it will be useful, but WITHOUT ANY |
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A |
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PARTICULAR PURPOSE. |
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=cut |
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1; |
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1; |