App::cpm::Tutorial - How to use cpm


$ cpm install Module


cpm is yet another CPAN client (like cpan, cpanp, and cpanm), which is fast!

How to install cpm

From CPAN:

$ cpanm -nq App::cpm

Or, download a self-contained cpm:

$ curl -fsSL --compressed > cpm
$ chmod +x cpm
$ ./cpm --version

# you can even install modules without installing cpm
$ curl -fsSL --compressed | perl - install Plack

First step

$ cpm install Plack

This command installs Plack into ./local, and you can use it by

$ perl -I$PWD/local/lib/perl5 -MPlack -E 'say Plack->VERSION'

If you want to install modules into current INC instead of ./local, then use --global/-g option.

$ cpm install --global Plack

By default, cpm outputs only DONE install Module things. If you want more verbose messages, use --verbose/-v option.

$ cpm install --verbose Plack

Second step

cpm can handle version range notation like cpanm. Let's see some examples.

$ cpm install Plack~'> 1.000, <= 2.000'
$ cpm install Plack~'== 1.0030'
$ cpm install Plack@1.0030  # this is an alias of ~'== 1.0030'

cpm can install dev releases (TRIAL releases).

$ cpm install Moose@dev

# if you prefer dev releases for not only Moose,
# but also its dependencies, then use global --dev option
$ cpm install --dev Moose

And cpm can install modules from git repositories directly.

$ cpm install git://

cpanfile and dist/url/mirror/git syntax

If you omit arguments, and there exists cpanfile in the current directory, then cpm loads modules from cpanfile, and install them

$ cat cpanfile
requires 'Moose', '2.000';
requires 'Plack', '> 1.000, <= 2.000';
$ cpm install

If you have cpanfile.snapshot, then cpm tries to resolve distribution names from it

$ cpm install -v
30186 DONE resolve (0.001sec) Plack -> Plack-1.0030 (from Snapshot)

cpm supports dist/url/mirror syntax in cpanfile just like cpanminus:

requires 'Path::Class', 0.26,
  dist => "KWILLIAMS/Path-Class-0.26.tar.gz";

# use dist + mirror
requires 'Cookie::Baker',
  dist => "KAZEBURO/Cookie-Baker-0.08.tar.gz",
  mirror => "";

# use the full URL
requires 'Try::Tiny', 0.28,
  url => "";

And yes, this is an experimental and fun part! cpm also supports git syntax in cpanfile.

requires 'Carl', git => 'git://';
requires 'App::cpm', git => '';
requires 'Perl::PrereqDistributionGatherer',
  git => '',
  ref => '3850305'; # ref can be revision/branch/tag

Please note that to support git syntax in cpanfile wholly, there are several TODOs.

Darkpan integration

There are CPAN modules that create darkpans (minicpan, CPAN mirror) such as CPAN::Mini, OrePAN2, Pinto.

Such darkpans store distribution tarballs in


and create the de facto standard index file 02packages.details.txt.gz in


If you want to use cpm against such darkpans, change the cpm resolver by --resolver/-r option:

$ cpm install --resolver 02packages, Module
$ cpm install --resolver 02packages,file::///path/to/darkpan   Module

Sometimes, your darkpan is not whole CPAN mirror, but partial, so some modules are missing in it. Then append --resolver metadb option to fall back to normal MetaDB resolver:

$ cpm install \
   --resolver 02packages, \
   --resolver metadb \

If you host your own darkmetadb for your own darkpan, you can use it too. Then append --resolver metadb option to fall back to normal MetaDB resolver:

$ cpm install \
   --resolver metadb,, \
   --resolver metadb \