optimg.pl

#!/usr/bin/env perl
#
# Copyright (C) 2010 Xiaodong Xu <xxdlhy@gmail.com>
#
# 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 2
# of the License, 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, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA

use strict;
use warnings;

use File::Find;

sub wanted {
    if (/\.png$/i) {
        print "Optimizing $File::Find::name\n";
        system "optipng -o5 $_";
    }
}

find( \&wanted, '.' );