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#!/usr/bin/perl
$VERSION = '0.06';
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=encoding utf8
=head1 NAME
cpansign - CPAN signature management utility
=head1 SYNOPSIS
    % cpansign              # verify an existing SIGNATURE, or
                            # make a new one if none exists 
    % cpansign file.par     # verify or sign a PAR file
    % cpansign sign         # make signature; overwrites existing one
    % cpansign -s           # same thing
    % cpansign verify       # verify a signature
    % cpansign -v           # same thing
    % cpansign -v --skip    # ignore files in MANIFEST.SKIP
    % cpansign help         # display this documentation
    % cpansign -h           # same thing
=head1 DESCRIPTION
This utility lets you create and verify SIGNATURE files. 
=cut
use strict;
use Module::Signature;
$Module::Signature::Verbose = 1;
my %cmd = (
    s => 'sign',
    v => 'verify',
    h => 'help',
);
my $op = $ARGV[0]; $op =~ s/^--?// if defined $op;
my $dwim;
if (!$op or $op eq 'skip' or -e $op) {
    $op = (-e 'SIGNATURE' ? 'verify' : 'sign');
    $dwim = 1;
}
my $cmd = $cmd{substr($op, 0, 1)};
(system("perldoc $0"), exit) if $cmd eq 'help';
my @args;
push @args, (overwrite => '1')       if $cmd eq 'sign';
push @args, (skip => '1')    if grep /^-?-?skip/, @ARGV;
if (my $sub = Module::Signature->can($cmd)) {
    if (@ARGV and -e $ARGV[-1]) {
        require PAR::Dist;
        PAR::Dist::_verify_or_sign(
            dist => $ARGV[-1],
            $dwim ? () : (action => $cmd, @args)
        );
    }
    else {
        #if ($cmd eq 'sign') {
        #    exit unless Module::Signature::verify();
        #}
        exit($sub->(@args));
    }
}
else {
    die "Unknown command: '$op'.\n".
        "Available actions: " . (join(', ', sort values %cmd)) .  ".\n";
}
exit;
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=head1 SEE ALSO
L<Module::Signature>
=head1 AUTHORS
Audrey Tang E<lt>autrijus@autrijus.orgE<gt>
=head1 LICENSE
This work is under the B<CC0 1.0 Universal> license.
To the extent possible under law, 唐鳳 has waived all copyright and related
or neighboring rights to Module-Signature.
This work is published from Taiwan.
L<http://creativecommons.org/publicdomain/zero/1.0>
=cut