#!/usr/bin/env perl

=pod

=head1 NAME

digestarchive - display entry hexdigest in archive

=head1 VERSION

0.043

=head1 SYNOPSIS

  digestarchive /path/to/archive.tar.gz
  # or
  cat /path/to/archive.tar.gz | digestarchive
  
  # output
  ** can not get digest **          foo/(DIR)
  ** can not get digest **          foo/bbb -> aaa(SYMLINK)
  b026324c6904b2a9cb4b88d6d61c81d1  foo/aaa(FILE)

=head1 OPTIONS

=over 4

=item -h, --help

Display help and exit

=item -v, --version

Display vesion and exit

=item --digest-type=<DIGEST_TYPE>

default MD5. you can designate the digest type, MD5 or SHA1

=back

=cut

use strict;
use warnings;
use App::digestarchive;
use Getopt::Long;
use FindBin qw($Script);
use Pod::Usage;

our $VERSION = '0.043';
our %ARCHIVE_ENTRY_TYPES = ( 
					0 => "FILE",
					1 => "HARDLINK",
					2 => "SYMLINK",
					3 => "CHARDEV",
					4 => "BLOCKDEV",
					5 => "DIR",
					6 => "FIFO",
					8 => "SOCKET",
					9 => "UNKNOWN",
					L => "LONGLINK",
					V => "LABEL",
				);
our %DIGEST_TYPE_LENGTH = (
					MD5  => 32,
					SHA1 => 40
				);

my($version, $help, $digest_type);
GetOptions(
	"version"       => \$version,
	"help"          => \$help,
	"digest-type=s" => \$digest_type
);
if ($version) {
    pod2usage(-exitval => 0, -verbose => 99, -sections => [qw(VERSION AUTHOR)]);
}
if ($help) {
    pod2usage(-exitval => 0, -verbose => 2);
}

my $file_or_buffer;

if (!-t STDIN || defined $ARGV[0] && $ARGV[0] eq "-") {
	$file_or_buffer = do { local $/; <STDIN> };
} elsif (defined $ARGV[0] && -f $ARGV[0]) {
    $file_or_buffer = $ARGV[0];
} else {
    pod2usage("$Script: No files given");
}

if (defined $digest_type && !exists $DIGEST_TYPE_LENGTH{$digest_type}) {
    pod2usage("$Script --digest-type: No support $digest_type yet");
}

my $app = App::digestarchive->new;
$app->digest_type($digest_type) if defined $digest_type;
$app->read($file_or_buffer);

my $length = $DIGEST_TYPE_LENGTH{$app->digest_type};
my $format = "%-${length}s  %s(%s)\n";
while (my $f = $app->next) {
	printf $format, $f->digest, $f->link_or_real_name, $ARCHIVE_ENTRY_TYPES{$f->type};
}

=pod

=head1 SEE ALSO

L<App::digestarchive>

=head1 AUTHOR

Akira Horimoto <emperor.kurt _at_ gmail.com>

=head1 COPYRIGHT AND LICENSE

This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.

Copyright (C) 2012 Akira Horimoto

=cut