All this does is create a tied scalar that when it goes out of scope returns you to your original working directory. (Or another of your choice.) Very handy if you want to move around the file-system in a function, but be where you started when you are done. Like this: 
sub some_func {
  my $saveDir = new PreserveWD;
  # Do stuff
}

[download]
package PreserveWD;

use strict 'vars';
use Carp;
use Cwd;


sub back {
  my $self = shift;
  chdir($$self) or confess("Cannot chdir to $$self: $!");
}

sub new {
  my $cwd;
  return tie $cwd, 'PreserveWD';
}

sub TIESCALAR {
  my ($type, $dir) = @_;
  $dir ||= cwd();
  return bless \$dir, $type;
}

*DESTROY = *back;

1;

[download]

In reply to Preserve working directory by tilly

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