NAME

    Carton - Perl module dependency manager (aka Bundler for Perl)

SYNOPSIS

      # On your development environment
      > cat cpanfile
      requires 'Plack', '0.9980';
      requires 'Starman', '0.2000';
    
      > carton install
      > git add cpanfile cpanfile.snapshot
      > git commit -m "add Plack and Starman"
    
      # Other developer's machine, or on a deployment box
      > carton install
      > carton exec starman -p 8080 myapp.psgi

AVAILABILITY

    Carton only works with perl installation with the complete set of core
    modules. If you use perl installed by a vendor package with modules
    stripped from core, Carton is not expected to work correctly.

    Also, Carton requires you to run your command/application with carton
    exec command, which means it's difficult or impossible to run in an
    embedded perl use case such as mod_perl.

DESCRIPTION

    carton is a command line tool to track the Perl module dependencies for
    your Perl application. Dependencies are declared using cpanfile format,
    and the managed dependencies are tracked in a cpanfile.snapshot file,
    which is meant to be version controlled, and the snapshot file allows
    other developers of your application will have the exact same versions
    of the modules.

    For cpanfile syntax, see cpanfile documentation.

TUTORIAL

 Initializing the environment

    carton will use the local directory to install modules into. You're
    recommended to exclude these directories from the version control
    system.

      > echo local/ >> .gitignore
      > git add cpanfile cpanfile.snapshot
      > git commit -m "Start using carton"

 Tracking the dependencies

    You can manage the dependencies of your application via cpanfile.

      # cpanfile
      requires 'Plack', '0.9980';
      requires 'Starman', '0.2000';

    And then you can install these dependencies via:

      > carton install

    The modules are installed into your local directory, and the
    dependencies tree and version information are analyzed and saved into
    cpanfile.snapshot in your directory.

    Make sure you add cpanfile and cpanfile.snapshot to your version
    controlled repository and commit changes as you update dependencies.
    This will ensure that other developers on your app, as well as your
    deployment environment, use exactly the same versions of the modules
    you just installed.

      > git add cpanfile cpanfile.snapshot
      > git commit -m "Added Plack and Starman"

 Deploying your application

    Once you've done installing all the dependencies, you can push your
    application directory to a remote machine (excluding local and .carton)
    and run the following command:

      > carton install --deployment

    This will look at the cpanfile.snapshot and install the exact same
    versions of the dependencies into local, and now your application is
    ready to run.

    The --deployment flag makes sure that carton will only install modules
    and versions available in your snapshot, and won't fallback to query
    for CPAN Meta DB for missing modules.

 Bundling modules

    carton can bundle all the tarballs for your dependencies into a
    directory so that you can even install dependencies that are not
    available on CPAN, such as internal distribution aka DarkPAN.

      > carton bundle

    will bundle these tarballs into vendor/cache directory, and

      > carton install --cached

    will install modules using this local cache. Combined with --deployment
    option, you can avoid querying for a database like CPAN Meta DB or
    downloading files from CPAN mirrors upon deployment time.

PERL VERSIONS

    When you take a snapshot in one perl version and deploy on another
    (different) version, you might have troubles with core modules.

    The simplest solution, which might not work for everybody, is to use
    the same version of perl in the development and deployment.

    To enforce that, you're recommended to use plenv and .perl-version to
    lock perl versions in development.

    You can also specify the minimum perl required in cpanfile:

      requires 'perl', '5.16.3';

    and carton (and cpanm) will give you errors when deployed on hosts with
    perl lower than the specified version.

COMMUNITY

    https://github.com/miyagawa/carton

      Code repository, Wiki and Issue Tracker

    irc://irc.perl.org/#cpanm

      IRC chat room

AUTHOR

    Tatsuhiko Miyagawa

COPYRIGHT

    Tatsuhiko Miyagawa 2011-

LICENSE

    This software is licensed under the same terms as Perl itself.

SEE ALSO

    cpanm

    cpanfile

    Bundler <http://gembundler.com/>

    pip <http://pypi.python.org/pypi/pip>

    npm <http://npmjs.org/>

    perlrocks <https://github.com/gugod/perlrocks>

    only