NAME

Acme::CPANModules::PERLANCAR::Task::CheckingModuleInstalledLoadable - Checking if a module is installed or loadable

VERSION

This document describes version 0.001 of Acme::CPANModules::PERLANCAR::Task::CheckingModuleInstalledLoadable (from Perl distribution Acme-CPANModulesBundle-PERLANCAR), released on 2018-01-09.

DESCRIPTION

Checking if a module is installed or loadable.

If you simply want to check that a module's .pm file is locatable in @INC, you can just do something like:

 my $mod = "Foo/Bar.pm";
 for my $dir (@INC) {
     next if ref $dir;
     if (-f "$dir/$mod") {
         print "Module $mod is installed";
         last;
     }
 }

Or you can use something like Module::Path or Module::Path::More which does similar to the above.

A module can also be loaded from a require hook in ~@INC~ (like in the case of fatpacked or datapacked script) and the above methods does not handle it. Instead, you'll need to use Module::Load::Conditional's check_install or Module::Installed::Tiny's module_installed:

 use Module::Load::Conditional qw(check_install);
 if (check_install(module => "Foo::Bar")) {
     # Foo::Bar is installed
 }

The above does not guarantee that the module will be loaded successfully. To check that, there's no other way but to actually try to load it:

 if (eval { require Foo::Bar; 1 }) {
     # Foo::Bar can be loaded (and was loaded!)
 }

INCLUDED MODULES

• Module::Path

• Module::Path::More

• Module::Load::Conditional

• Module::Installed::Tiny

HOMEPAGE

Please visit the project's homepage at https://metacpan.org/release/Acme-CPANModulesBundle-PERLANCAR.

SOURCE

Source repository is at https://github.com/perlancar/perl-Acme-CPANModulesBundle-PERLANCAR.

BUGS

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

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.

SEE ALSO

Acme::CPANModules - about the Acme::CPANModules namespace

cpanmodules - CLI tool to let you browse/view the lists

AUTHOR

perlancar <perlancar@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2018 by 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.