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#!/usr/bin/perl
use strict;
use warnings;

BEGIN { pop @INC if $INC[-1] eq '.' }
use File::Find;
use Getopt::Std;
use Archive::Tar;
use Data::Dumper;

# Allow (and ignore) --format=ustar, for compatibility with GNU tar
for (my $i = 0; $i < @ARGV; ++$i) {
    last if $ARGV[$i] eq '--';
    splice @ARGV, $i--, 1 if $ARGV[$i] eq '--format=ustar';
    splice @ARGV, $i--, 2 if $i < $#ARGV
        && $ARGV[$i] eq '--format' && $ARGV[$i + 1] eq 'ustar';
}

# Allow historic support for dashless bundled options
#  tar cvf file.tar
# is valid (GNU) tar style
@ARGV && $ARGV[0] =~ m/^[DdcvzthxIC]+[fT]?$/ and
    unshift @ARGV, map { "-$_" } split m// => shift @ARGV;
my $opts = {};
getopts('Ddcvzthxf:ICT:', $opts) or die usage();

### show the help message ###
die usage() if $opts->{h};

### enable debugging (undocumented feature)
local $Archive::Tar::DEBUG                  = 1 if $opts->{d};

### enable insecure extracting.
local $Archive::Tar::INSECURE_EXTRACT_MODE  = 1 if $opts->{I};

### sanity checks ###
unless ( 1 == grep { defined $opts->{$_} } qw[x t c] ) {
    die "You need exactly one of 'x', 't' or 'c' options: " . usage();
}

my $compress    = $opts->{z} ? 1 : 0;
my $verbose     = $opts->{v} ? 1 : 0;
my $file        = $opts->{f} ? $opts->{f} : 'default.tar';
my $tar         = Archive::Tar->new();

if( $opts->{c} ) {
    my @files;
    my @src = @ARGV;
    if( $opts->{T} ) {
      if( $opts->{T} eq "-" ) {
        chomp( @src = <STDIN> );
	} elsif( open my $fh, "<", $opts->{T} ) {
	    chomp( @src = <$fh> );
	} else {
	    die "$0: $opts->{T}: $!\n";
	}
    }

    find( sub { push @files, $File::Find::name;
                print $File::Find::name.$/ if $verbose }, @src );

    if ($file eq '-') {
        use IO::Handle;
        $file = IO::Handle->new();
        $file->fdopen(fileno(STDOUT),"w");
    }

    my $tar = Archive::Tar->new;
    $tar->add_files(@files);
    if( $opts->{C} ) {
        for my $f ($tar->get_files) {
            $f->mode($f->mode & ~022); # chmod go-w
        }
    }
    $tar->write($file, $compress);
} else {
    if ($file eq '-') {
        use IO::Handle;
        $file = IO::Handle->new();
        $file->fdopen(fileno(STDIN),"r");
    }

    ### print the files we're finding?