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App::cpanminus - get, unpack, build and install modules from CPAN
cpanm Module
Run `cpanm -h' for more options.
cpanminus is a script to get, unpack, build and install modules from
Why? It's dependency free, requires zero configuration, and stands
alone. When running, it requires only 10MB of RAM.
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 | 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
cd ~/bin
curl -LO
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).
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)
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 The site is updated every hour to
reflect the latest changes from fast syncing mirrors. The script then
also falls back to the site 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 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
Same as Perl.
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.
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 - source code repository, issue
irc: - discussions about Perl toolchain. I'm there.
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.