NAME

inc - Smart @INC Processing

SYNOPSIS

    use inc <smart-object-spec-list>;

or:

    perl -Minc=<smart-object-spec-list> …

or:

    PERL5OPT='-Minc=<smart-object-spec-list>' prove -v t/

DESCRIPTION

The inc module redefines @INC to a list of predefined smart objects. These objects are really just code refs for handy lookup techniques. For example, only finding modules that were core in Perl 5.8.1, or only finding non-core modules that are declared prerequisites of some module.

A real example is testing a module that you are releasing to CPAN. You can use this to make sure that only predeclared prerequisite modules get loaded:

    PERL5OPT='-Minc=dist.ini:core=5.8.1:lib' prove -v t/

Each smart object object can have an argument list:

    use inc 'core=5.8.1';

In this example core is the name of the smart object (code ref) and '5.8.1' is an argument. Multiple arguments are separated by commas.

The list of objects can be a real list or a single string separated by colons. This is to allow easy usage loading inc using -M:

    perl -Minc=lib:core …

SMART OBJECTS

This is a list of the smart objects that are predefined by the inc module (in alpha order):

blib

Use the path values that blib.pm would add.

cache

Some of the smart objects can take long time to get their information. They might need to fetch information from the internet, for example. This object will save all the state into a file called ./.perl-inc-cache. You can override this filename by passing a value of your own as an argument.

If the cache file exists it will be used. If not, values will be stored to it. To refresh the cache, simply delete the file.

core

Only finds the modules that are in core for the version of Perl that is running. You can give this a Perl version argument, and modules will be limited to the ones that were core for that version.

cwd

Adds the absolute path of the current directory.

deps

Only finds modules that are known prereqs of a module. Defaults to the module from which it was called. You can pass in the names of one or more modules to use.

dot

Adds File::Spec->curdir. (Usually .).

dzil

Use Dist::Zilla's dzil listdeps to find prereqs. Only find these modules.

inc

Expands to the value on @INC prior to the execution of use inc ….

INC

Expands to the perl's default @INC.

LC

Lancaster Core. Alias for core=5.8.1

lib

Expands to an absolute path of ./lib.

meta

Only find modules listed as prereqs in META.json or META.yaml. Also finds modules that are prereqs of those modules.

none

Use this to set @INC to the empty list. The use inc … statement requires at least one object, so this is needed to make it empty.

not=<regex>

Removes paths that match the regex.

ok=<regex>

If the name of the module being loaded matches the regex, it will be loaded from the original @INC.

perl5lib

Expands to the paths in the PERL5LIB environment variable.

priv

Adds privlib and archlib paths from the Config module.

-priv

Removes privlib and archlib paths from the Config module.

show

This is for debugging. Prints the @INC values that have been assembled so far.

site

Adds sitelib and sitearch paths from the Config module.

-site

Removes sitelib and sitearch paths from the Config module.

zild

Use Zilla::Dist's zild listdeps to find prereqs. Only find these modules.

Directory Paths

Any list value containing a '/' in the name, is a real filesystem path. That means you can do something like:

    use inc 'foo', @INC, 'bar';

::Foo (Plugins)

Use the inc::Plugin::Foo module to look for smart objects. Objects will be searched in plugins first, then inc.pm.

USE WITHOUT USE

If you just want to get the list of real values the inc would create from a usage list, do this:

    require inc;
    my @inc = inc->list(<smart-object-spec-list>);

This can be used to have more control and set @INC yourself.

INC PLUGINS

You can define your own inc plugin by making a module called inc::Plugin::Mine:

    package inc::Plugin::Mine;
    sub inc_this {
      …
    }

People can use it like this:

    use inc qw'::Mine this=arg1,arg2';

Plugins are searched in the reverse order they are loaded in. For example:

    use inc qw'this ::His that ::Hers other';

The this object will only be looked for in inc. The that object will be looked for in inc::Plugin::His then inc. The that object will be looked for in inc::Plugin::Hers, then inc::Plugin::His then inc.

EXAMPLE USAGES

… coming soon …

AUTHOR

Ingy döt Net <ingy@cpan.org>

COPYRIGHT

Copyright 2014. Ingy döt Net.

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

See http://www.perl.com/perl/misc/Artistic.html

cpanm inc

perl -MCPAN -e shell
install inc