Require::Hook - Namespace for require() hooks


This document describes version 0.002 of Require::Hook (from Perl distribution Require-Hook), released on 2020-11-13.


As one already understands, Perl lets you put coderefs or objects in @INC as "hooks". This lets you do all sorts of things when it comes to loading modules, for example:

  • faking that a module does not exist when it does

    This can be used for testing.

  • loading module from various sources

    You can load module source from the DATA section or variables, as is done in a fatpacked script. Or you can retrieve module source from CPAN so a script can magically run without installing extra CPAN modules.

  • munging source code

    Like adding some Perl code before (use strict;) or after, for testing purpose or otherwise.

  • decrypt from an ecrypted source

In the case of objects, perl will call your INC method. So this is how you would write a module for a require hook:

 package My::INCHandler;
 sub new { ... }
 sub My::INCHandler::INC {
     my ($self, $filename) = @_;

Require::Hook is just a namespace to put and share all your require hooks.


Please visit the project's homepage at


Source repository is at


Please report any bugs or feature requests on the bugtracker website

When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.


Require::Hook::* modules.

Require::HookChain is another namespace for require hooks and also a way to use Require::Hook::* modules.

RHC is a short alias for Require::HookChain for convenience in one-liners.


perlancar <>


This software is copyright (c) 2020, 2017 by

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.