IO::All::Rule - Iterative, recursive file finder with IO::All


version 0.003


  use IO::All::Rule;

  my $rule = IO::All::Rule->new; # match anything
  $rule->file->size(">10k");     # add/chain rules

  # iterator interface
  my $next = $rule->iter( @dirs );
  while ( my $file = $next->() ) {

  # list interface
  for my $file ( $rule->all( @dirs ) ) {


This module iterates over files and directories to identify ones matching a user-defined set of rules.

This is a thin subclass of Path::Iterator::Rule that operates on and returns IO::All objects instead of bare file paths.

See that module for details on features and usage.

See "PERFORMANCE" for important caveats. You might want to use Path::Iterator::Rule instead.


This module may be extended in the same way as Path::Iterator::Rule, but test subroutines receive IO::All objects instead of strings.

Consider whether you should extend Path::Iterator::Rule or IO::All::Rule. Extending this module specifically is recommended if your tests rely on having a IO::All object.


If you run with lexical warnings enabled, Path::Iterator::Rule will issue warnings in certain circumstances (such as a read-only directory that must be skipped). To disable these categories, put the following statement at the correct scope:

  no warnings 'Path::Iterator::Rule';


Because all files and directories as processed as IO::All objects, using this module is significantly slower than Path::Iterator::Rule.

If you are scanning tens of thousands of files and speed is a concern, you might be better off using that instead and only creating objects from results.

    use IO::All;
    use Path::Iterator::Rule;

    my $rule = Path::Iterator::Rule->new->file->size(">10k");
    my $next = $rule->iter( @dirs );

    while ( my $file = io($next->()) ) {

Generally, I recommend use this module only if you need to write custom rules that need IO::All features.


Bugs / Feature Requests

Please report any bugs or feature requests through the issue tracker at You will be notified automatically of any progress on your issue.

Source Code

This is open source software. The code repository is available for public review and contribution under the terms of the license.

  git clone git://


David Golden <>


This software is Copyright (c) 2013 by David Golden.

This is free software, licensed under:

  The Apache License, Version 2.0, January 2004