#!/usr/bin/perl -w

# This script unpacks tarballs and zip files, and uncompresses .svgz files

use strict;
use File::Basename;
use File::Find;
use File::Path;
use File::Spec::Functions;

my $opt_debug = 1;

# Executes program and returns error code
sub main {
    my @search_dirs = ();

    foreach my $file (@ARGV) {
	if (-d $file) {
	    push(@search_dirs, $file);
	} elsif (-f $file) {
	    process_file($file)
		or warn "Could not process $file\n";
	}
    }

    sub wanted {
	if (!-d) {
	    return process_file($File::Find::name);
	}
    }

    if (@search_dirs) {
	find({ wanted => \&wanted, no_chdir => 0}, @search_dirs);
    }

    return 0;
}

sub process_file {
    my $filename = shift;
    my ($basename,$dir,$ext)  = fileparse($filename, '\..*?');
    $ext =~ s/^\.//;
    $filename = "$basename.$ext";

    if (! -e $filename) {
	warn "File '$filename' does not appear to exist\n";
    } elsif ($filename =~ /\.svgz$/) {
	print `gunzip -S svgz $filename`;

    } elsif ($filename =~ /\.tgz$/i or /\.tar.gz/i) {
	print `tar xzf $filename`;

    } elsif ($filename =~ /\.zip$/i) {
	eval { mkpath($basename, 1, 0755) };
	if ($@ or ! -d $basename) {
	    warn "Could not create directory '$basename': $@ - skipping '$filename'\n";
	} else {
	    print `unzip -d $basename $filename`;
	}

    } elsif ($filename =~ /\.tar.bz2$/i) {
	print `bunzip2 $filename`;
	print `tar xf $basename`;

    } else {
	warn "Skipping unknown file $filename\n"
	    if $opt_debug>2;
    }
}

exit main();