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Require-Hook-0.003
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/ Require::Hook

NAME

Require::Hook - Namespace for require() hooks

VERSION

This document describes version 0.003 of Require::Hook (from Perl distribution Require-Hook), released on 2023-04-22.

DESCRIPTION

NOTE: Please see Require::HookChain instead which largely supersedes this.

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) = @_;
    ...
}
1;

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

HOMEPAGE

Please visit the project's homepage at https://metacpan.org/release/Require-Hook.

SOURCE

Source repository is at https://github.com/perlancar/perl-Require-Hook.

SEE ALSO

Require::Hook::* modules.

Require::HookChain is a newer framework that largely supersedes Require::Hook.

AUTHOR

perlancar <perlancar@cpan.org>

CONTRIBUTING

To contribute, you can send patches by email/via RT, or send pull requests on GitHub.

Most of the time, you don't need to build the distribution yourself. You can simply modify the code, then test via:

% prove -l

If you want to build the distribution (e.g. to try to install it locally on your system), you can install Dist::Zilla, Dist::Zilla::PluginBundle::Author::PERLANCAR, Pod::Weaver::PluginBundle::Author::PERLANCAR, and sometimes one or two other Dist::Zilla- and/or Pod::Weaver plugins. Any additional steps required beyond that are considered a bug and can be reported to me.

COPYRIGHT AND LICENSE

This software is copyright (c) 2023, 2020, 2017 by perlancar <perlancar@cpan.org>.

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

BUGS

Please report any bugs or feature requests on the bugtracker website https://rt.cpan.org/Public/Dist/Display.html?Name=Require-Hook

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.