NAME
    App::cpanminus - get, unpack, build and install modules from CPAN

SYNOPSIS
        cpanm Module

    Run `cpanm -h' for more options.

DESCRIPTION
    cpanminus is a script to get, unpack, build and install modules from
    CPAN.

    Why? It's dependency free, requires zero configuration, and stands
    alone. When running, it requires only 10MB of RAM.

INSTALLATION
    There are Debian packages, RPMs, FreeBSD ports, and packages for other
    operation systems available. If you want to use the package management
    system, search for cpanminus and use the appropriate command to install.
    This makes it easy to install `cpanm' to your system without thinking
    about where to install, and later upgrade.

    You can also use the latest cpanminus to install cpanminus itself:

        curl -L http://cpanmin.us | perl - --sudo App::cpanminus

    This will install `cpanm' to your bin directory like `/usr/local/bin'
    (unless you configured `INSTALL_BASE' with local::lib), so you might
    need the `--sudo' option.

    Later you can say `cpanm --self-upgrade --sudo' to upgrade to the latest
    version.

    Otherwise,

        cd ~/bin
        curl -LO http://xrl.us/cpanm
        chmod +x cpanm
        # edit shebang if you don't have /usr/bin/env

    just works, but be sure to grab the new version manually when you
    upgrade (`--self-upgrade' might not work).

DEPENDENCIES
    perl 5.8 or later.

    *   'tar' executable (bsdtar or GNU tar version 1.22 are rcommended) or
        Archive::Tar to unpack files.

    *   C compiler, if you want to build XS modules.

    *   make

    *   Module::Build (core in 5.10)

QUESTIONS
  Another CPAN installer?

    OK, the first motivation was this: the CPAN shell runs out of memory (or
    swaps heavily and gets really slow) on Slicehost/linode's most
    affordable plan with only 256MB RAM. Should I pay more to install perl
    modules from CPAN? I don't think so.

  But why a new client?

    First of all, I have no intention to dis CPAN or CPANPLUS developers.
    Don't get me wrong. They're great tools I've used for *literally* years
    (you know how many modules I have on CPAN, right?). I really respect
    their efforts of maintaining the most important tools in the CPAN
    toolchain ecosystem.

    However, for less experienced users (mostly from outside the Perl
    community), or even really experienced Perl developers who know how to
    shoot themselves in their feet, setting up the CPAN toolchain often
    feels like yak shaving, especially when all they want to do is just
    install some modules and start writing code.

  Zero-conf? How does this module get/parse/update the CPAN index?

    It queries the CPAN Meta DB site running on Google AppEngine at
    http://cpanmetadb.appspot.com/. The site is updated every hour to
    reflect the latest changes from fast syncing mirrors. The script then
    also falls back to the site http://search.cpan.org/. I've been talking
    to and working with with the QA/toolchain people for building a more
    reliable CPAN DB website.

    Fetched files are unpacked in `~/.cpanm'. You can configure this with
    the `PERL_CPANM_HOME' environment variable.

  Where does this install modules to? Do I need root access?

    It installs to wherever ExtUtils::MakeMaker and Module::Build are
    configured to (via `PERL_MM_OPT' and `MODULEBUILDRC'). So if you're
    using local::lib, then it installs to your local perl5 directory.
    Otherwise it installs to the siteperl directory.

    cpanminus at a boot time checks whether you have configured local::lib,
    or have the permission to install modules to the sitelib directory. If
    neither, it automatically sets up local::lib compatible installation
    path in a `perl5' directory under your home directory. To avoid this,
    run the script as the root user, with `--sudo' option or with
    `--local-lib' option.

COPYRIGHT
    Copyright 2010- Tatsuhiko Miyagawa

    The standalone executable contains the following modules embedded.

    Parse::CPAN::Meta Copyright 2006-2009 Adam Kennedy
    local::lib Copyright 2007-2009 Matt S Trout
    HTTP::Tiny Copyright 2011 Christian Hansen
    Module::Metadata Copyright 2001-2006 Ken Williams. 2010 Matt S Trout
LICENSE
    Same as Perl.

CREDITS
  CONTRIBUTORS

    Patches and code improvements were contributed by:

    Goro Fuji, Kazuhiro Osawa, Tokuhiro Matsuno, Kenichi Ishigaki, Ian
    Wells, Pedro Melo, Masayoshi Sekimura, Matt S Trout, squeeky, horus and
    Ingy dot Net.

  ACKNOWLEDGEMENTS

    Bug reports, suggestions and feedbacks were sent by, or general
    acknowledgement goes to:

    Jesse Vincent, David Golden, Andreas Koenig, Jos Boumans, Chris
    Williams, Adam Kennedy, Audrey Tang, J. Shirley, Chris Prather, Jesse
    Luehrs, Marcus Ramberg, Shawn M Moore, chocolateboy, Chirs Nehren,
    Jonathan Rockway, Leon Brocard, Simon Elliott, Ricardo Signes, AEvar
    Arnfjord Bjarmason, Eric Wilhelm, Florian Ragwitz and xaicron.

COMMUNITY
    http://github.com/miyagawa/cpanminus - source code repository, issue
    tracker
    irc: - discussions about Perl toolchain. I'm there.
NO WARRANTY
    This software is provided "as-is," without any express or implied
    warranty. In no event shall the author be held liable for any damages
    arising from the use of the software.

SEE ALSO
    CPAN CPANPLUS pip