#!/usr/bin/perl

use strict;
use File::Copy;
use File::Path;
use Cwd 'chdir';
use vars qw(%dest $odir $curr $file $dir);

%dest = ();
$0 =~ /(.*)backout$/i;
chdir $1 if $1;
$curr = $ENV{PWD};
open DAT, 'backout.dat' || die "Cannot open backout.dat\n";
chomp ($odir =<DAT>);
chdir $odir;
if($ENV{PWD} eq $curr) {die "Cannot chdir to backout directory $odir\n"};

while (($file, $dir) = split /\s+/, <DAT>) {
    unless(-r $file) {die "Cannot copy $file\n"};
    unless(-w $dir)  {die "$dir is not writable\n"};
    $dest{$file} = $dir;
}
close DAT;

while (($file, $dir) = each %dest) {
    copy $file => $dir or die "Cannot copy $file to $dir\n";
}

chdir $curr;
rmtree "$odir", 0, 0;
unlink 'backout.dat';