/usr/share/perl5/String/Copyright.pm is in libstring-copyright-perl 0.003005-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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use strict;
use warnings;
use utf8;
use re (qw/eval/);
package String::Copyright;
=encoding UTF-8
=head1 NAME
String::Copyright - Representation of text-based copyright statements
=head1 VERSION
Version 0.003005
=cut
our $VERSION = '0.003005';
# Dependencies
use parent 'Exporter::Tiny';
use Carp ();
use Number::Range;
our @EXPORT = qw/copyright/;
use constant {
PLAINTEXT => 0,
BLOCKS => 1,
FORMAT => 2,
};
use overload (
q{""} => '_compose',
fallback => 1,
);
=head1 SYNOPSIS
use String::Copyright;
my $copyright = copyright(<<'END');
copr. © 1999,2000 Foo Barbaz <fb@acme.corp> and Acme Corp.
Copyright (c) 2001,2004 Foo (work address) <foo@zorg.corp>
Copyright 2003, Foo B. and friends
© 2000, 2002 Foo Barbaz <foo@bar.baz>
END
print $copyright;
# Copyright 1999-2000 Foo Barbaz <fb@acme.com> and Acme Corp.
# Copyright 2000, 2002 Foo Barbaz and Acme Corp.
# Copyright 2001, 2004 Foo (work address) <foo@zorg.org>
# Copyright 2003 Foo B. and friends
=head1 DESCRIPTION
L<String::Copyright> Parses common styles of copyright statements
and serializes in normalized format.
=head1 OPTIONS
Options can be set as an argument to the 'use' statement.
=head2 threshold, threshold_before, threshold_after
use String::Copyright { threshold_after => 5 };
Stop parsing after this many lines whithout copyright information,
before or after having found any copyright information at all.
C<threshold> sets both C<threshold_before> and C<threshold_after>.
By default unset: All lines are parsed.
=head2 format( \&sub )
use String::Copyright { format => \&NGU_style } };
sub GNU_style {
my ( $years, $owners ) = @_;
return 'Copyright (C) ' . join ' ', $years || '', $owners || '';
}
=head1 FUNCTIONS
Exports one function: C<copyright>.
This module uses L<Exporter::Tiny> to export functions,
which allows for flexible import options;
see the L<Exporter::Tiny> documentation for details.
=cut
my $blank_re = qr/[ \t]/;
my $blank_or_break_re = qr/$blank_re*\n?$blank_re*/;
my $sign_re = qr/copyright(?:-holders?)?|copr\.|[©⒞Ⓒⓒ🄒🄫🅒]/i;
my $pseudo_sign_re = qr/\(c\)/i;
my $broken_sign_re = qr/\?$blank_re*/;
my $year_re = qr/\b[0-9]{4}\b/;
my $comma_re
= qr/$blank_re*,$blank_or_break_re|$blank_or_break_re,?$blank_re*/;
my $dash_re
= qr/$blank_re*[-˗‐‑‒–—―⁃−﹣-]$blank_or_break_re*/;
my $owner_intro_re = qr/\bby$blank_or_break_re/;
my $owner_prefix_re = qr/[(*<@[{]/;
my $owner_initial_re = qr/[^\s!\"#$%&'()*+,.\/:;<=>?@[\\\]^_`{|}~]/;
my $boilerplate_re
= qr/${comma_re}All$blank_re+Rights$blank_re+Reserved[.!]?/i;
# this should cause *no* false positives, and stop-chars therefore
# exclude e.g. email address building blocks; tested against the code
# corpus at https://codesearch.debian.net/ (tricky: its RE2 engine lacks
# support for negative groups) using searches like these:
# (?i)copyright (?:(?:claim|holder|info|information|notice|owner|ownership|statement|string)s?|in|is|to)@\w
# (?i)copyright (?:(?:claim|holder|info|information|notice|owner|ownership|statement|string)s?|in|is|to)@\b[-_@]
# (?im)copyright (?:(?:claim|holder|info|information|notice|owner|ownership|statement|string)s?|in|is|to)[^ $]
my $chatter_copyright_re
= qr/(?:assigned|claim|holder|info|information|law|notice|owner|ownership|statement|string)s?|and|eq|generated|in|is|on|to/i;
my $the_notname_re
= qr/concrete|fault|first|immediately|least|min\/max|one|outer|previous|ratio|sum|user/i;
my $the_sentence_re
= qr/(?:\w+$blank_re+){1,10}(?:are|can(?:not)?|in|is|must|was)/i;
my $chatter_pseudosign_re
= qr/(?:the$blank_re+(?:$the_notname_re|$the_sentence_re)|there)\b/;
my $chatter_re
= qr/copyright$blank_or_break_re$chatter_copyright_re(?:$|@\W|[^a-zA-Z0-9@_-])|$blank_re*$pseudo_sign_re$blank_or_break_re+$chatter_pseudosign_re/im;
my $signs_re
= qr/(?:$sign_re|(?:^|$blank_re)$pseudo_sign_re)(?:$blank_re+(?:$sign_re|$pseudo_sign_re))*/m;
my $yearspan_re = qr/$year_re(?:$dash_re$year_re)?/;
my $years_re = qr/$yearspan_re(?:$comma_re$yearspan_re)*/;
my $owners_re = qr/$owner_prefix_re*$owner_initial_re\S*(?:$blank_re*\S+)*/;
my $signs_and_more_re
= qr/(?:$chatter_re.*|$signs_re(?::$blank_or_break_re|$comma_re)$broken_sign_re?($years_re?$comma_re?$owner_intro_re?$owners_re?)|(?:\n|\z))/;
sub _generate_copyright
{
my ( $class, $name, $args, $globals ) = @_;
return sub {
my $copyright = shift;
Carp::croak("String::Copyright strings require defined parts")
unless 1 + @_ == grep {defined} $copyright, @_;
# String::Copyright objects are effectively immutable and can be reused
if ( !@_ && ref($copyright) eq __PACKAGE__ ) {
return $copyright;
}
# stringify objects
$copyright = "$copyright";
# TODO: also parse @_ - but each separately!
my @block;
my $skipped = 0;
while ( $copyright =~ /$signs_and_more_re/g ) {
my $owners = $1;
if ( $globals->{threshold_before} || $globals->{threshold} ) {
last
if (!@block
and !length $owners
and ++$skipped >= ( $globals->{threshold_before}
|| $globals->{threshold} ) );
}
if ( $globals->{threshold_after} || $globals->{threshold} ) {
# "after" detects end of _current_ line so is skewed by one
last
if (@block
and !length $owners
and ++$skipped >= 1
+ ( $globals->{threshold_after} || $globals->{threshold} )
);
}
next if ( !length $owners );
$skipped = 0;
my @span = $owners =~ /\G($yearspan_re)(?:$comma_re|\Z)/gm;
if (@span) {
$owners = substr( $owners, $+[0] );
}
my $years;
# normalize
if (@span) {
## no critic (ProhibitMutatingListFunctions)
my $range
= Number::Range->new( map { s/$dash_re/../; $_ } @span );
## use critic
$years = $range->range;
$years =~ s/,/, /g;
$years =~ s/\.\./-/g;
}
if ($owners) {
$owners =~ s/^$owner_intro_re//g;
$owners =~ s/\s{2,}/ /g;
$owners =~ s/^$owner_intro_re//g;
$owners =~ s/$boilerplate_re.*//g;
}
# split owner into owner_id and owner
push @block, [ $years || undef, $owners || undef ];
}
# TODO: save $skipped_lines to indicate how dirty parsing was
my $ext_format = $globals->{format};
my $format
= $globals->{format}
? sub { $ext_format->( $_->[0], $_->[1] ) }
: sub { join ' ', '©', $_->[0] || (), $_->[1] || () };
bless [ $copyright, \@block, $format ], __PACKAGE__;
}
}
sub new
{
my ( $self, @data ) = @_;
Carp::croak("String::Copyright require defined, positive-length parts")
unless 1 + @_ == grep { defined && length } @data;
# String::Copyright objects are simply stripped of their string part
if ( !@_ && ref($self) eq __PACKAGE__ ) {
return bless [ undef, $data[1] ], __PACKAGE__;
}
# FIXME: properly validate data
Carp::croak("String::Copyright blocks must be an array of strings")
unless @_ == grep { ref eq 'ARRAY' } @data;
bless [ undef, \@data ], __PACKAGE__;
}
sub _compose
{
my $format = $_[0]->[FORMAT];
join "\n", map {&$format} @{ $_[0]->[BLOCKS] };
}
sub is_normalized { !defined $_[0]->[PLAINTEXT] }
=head1 SEE ALSO
=over 4
=item *
L<Encode>
=item *
L<Exporter::Tiny>
=back
=head1 BUGS/CAVEATS/etc
L<String::Copyright> operates on strings, not bytes.
Data encoded as UTF-8, Latin1 or other formats
need to be decoded to strings before use.
Only ASCII characters and B<©> (copyright sign) are directly processed.
If copyright sign is mis-detected
or accents or multi-byte characters display wrong,
then most likely the data was not decoded into a string.
If ranges or lists of years are not tidied,
then maybe it contained non-ASCII whitespace or digits.
=head1 AUTHOR
Jonas Smedegaard C<< <dr@jones.dk> >>
=head1 COPYRIGHT AND LICENSE
Derived from L<App::Licensecheck> originally part of the KDE SDK,
originally introduced by Stefan Westerfeld C<< <stefan@space.twc.de> >>;
and on the script licensecheck2dep5 part of Debian CDBS tool,
written by Jonas Smedegaard.
Copyright © 2007, 2008 Adam D. Barratt
Copyright © 2005-2012, 2016 Jonas Smedegaard
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 3, 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, see <https://www.gnu.org/licenses/>.
=cut
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