App::perlbrew(3)

NAME
App::perlbrew - Manage perl installations in your "$HOME"

SYNOPSIS
    # Installation
    curl -L https://install.perlbrew.pl | bash

    # Initialize
    perlbrew init

    # See what is available
    perlbrew available

    # Install some Perls
    perlbrew install 5.32.1
    perlbrew install perl-5.28.3
    perlbrew install perl-5.33.6

    # See what were installed
    perlbrew list

    # Swith to an installation and set it as default
    perlbrew switch perl-5.32.1

    # Temporarily use another version only in current shell.
    perlbrew use perl-5.28.3
    perl -v

    # Turn it off and go back to the system perl.
    perlbrew off

    # Turn it back on with 'switch', or 'use'
    perlbrew switch perl-5.32.1
    perlbrew use perl-5.32.1

    # Exec something with all perlbrew-ed perls
    perlbrew exec -- perl -E 'say $]'

DESCRIPTION
perlbrew is a program to automate the building and installation of perl in an easy way. It provides multiple isolated perl environments, and a mechanism for you to switch between them.

Everything are installed unter "~/perl5/perlbrew". You then need to include a bashrc/cshrc provided by perlbrew to tweak the PATH for you. You then can benefit from not having to run "sudo" commands to install cpan modules because those are installed inside your "HOME" too.

For the documentation of perlbrew usage see perlbrew command on MetaCPAN <https://metacpan.org/>, or by running "perlbrew help", or by visiting perlbrew's official website <https://perlbrew.pl/>. The following documentation features the API of "App::perlbrew" module, and may not be remotely close to what your want to read.

INSTALLATION
It is the simplest to use the perlbrew installer, just paste this statement to your terminal:

    curl -L https://install.perlbrew.pl | bash

Or this one, if you have "fetch" (default on FreeBSD):

    fetch -o- https://install.perlbrew.pl | sh

After that, "perlbrew" installs itself to "~/perl5/perlbrew/bin", and you should follow the instruction on screen to modify your shell rc file to put it in your PATH.

The installed perlbrew command is a standalone executable that can be run with system perl. The minimum required version of system perl is 5.8.0, which should be good enough for most of the OSes these days.

A fat-packed version of patchperl is also installed to "~/perl5/perlbrew/bin", which is required to build old perls.

The directory "~/perl5/perlbrew" will contain all install perl executables, libraries, documentations, lib, site_libs. In the documentation, that directory is referred as "perlbrew root". If you need to set it to somewhere else because, say, your "HOME" has limited quota, you can do that by setting "PERLBREW_ROOT" environment variable before running the installer:

    export PERLBREW_ROOT=/opt/perl5
    curl -L https://install.perlbrew.pl | bash

As a result, different users on the same machine can all share the same perlbrew root directory (although only original user that made the installation would have the permission to perform perl installations.)

If you need to install perlbrew using a Perl that isn't either "/usr/bin/perl" or "/usr/local/bin/perl", set and export the environment variable "PERLBREW_SYSTEM_PERL" and then install as described above. Note that you must not use a perlbrew-managed perl.

You may also install perlbrew from CPAN:

    cpan App::perlbrew

In this case, the perlbrew command is installed as "/usr/bin/perlbrew" or "/usr/local/bin/perlbrew" or others, depending on the location of your system perl installation.

Please make sure not to run this with one of the perls brewed with perlbrew. It's the best to turn perlbrew off before you run that, if you're upgrading.

    perlbrew off
    cpan App::perlbrew

You should always use system cpan (like /usr/bin/cpan) to install "App::perlbrew" because it will be installed under a system PATH like "/usr/bin", which is not affected by perlbrew "switch" or "use" command.

The "self-upgrade" command will not upgrade the perlbrew installed by cpan command, but it is also easy to upgrade perlbrew by running "cpan App::perlbrew" again.

PROJECT DEVELOPMENT
perlbrew project <https://perlbrew.pl/> uses github <https://github.com/gugod/App-perlbrew/issues> for issue tracking. Issues sent to these two systems will eventually be reviewed and handled. To participate, you need a github account.

Please briefly read the short instructions about how to get your work released to CPAN:

<https://github.com/gugod/App-perlbrew/blob/develop/CONTRIBUTING.md>

AUTHOR
Kang-min Liu "<gugod@gugod.org>"

COPYRIGHT
Copyright (c) 2023 Kang-min Liu "<gugod@gugod.org>".

LICENCE
The MIT License

DISCLAIMER OF WARRANTY
BECAUSE THIS SOFTWARE IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE SOFTWARE, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE SOFTWARE "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE SOFTWARE IS WITH YOU. SHOULD THE SOFTWARE PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR, OR CORRECTION.

IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE SOFTWARE AS PERMITTED BY THE ABOVE LICENCE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE SOFTWARE (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE SOFTWARE TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.