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What's new in
Carton & cpanm
Tatsuhiko Miyagawa
YAPC::Asia 2013 Keio University
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Me
• Tatsuhiko Miyagawa
• Lives in San Francisco
• {github,twitter,CPAN}/miyagawa
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speakerdeck.com
/miyagawa
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Agenda
• cpanm 1.6 / 1.7
• Carton 1.0
• What's Next
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cpanminus
tiny, standalone CPAN installer
that "just works"
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vs. other installers
Sane defaults. Quiet output.
Fast and lightweight. One file install.
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%
curl
-‐L
cpanmin.us
\
|
perl
-‐
App::cpanminus
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♥ perlbrew, plenv
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cpanm 1.6
released in 2/26
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Pinning versions
Flexible version query
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>
cpanm
[email protected]
>
cpanm
Plack~">=
1.0,
<
2.0"
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♥ MetaCPAN
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--dev
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install via git
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>
cpanm
git://github.com/plack/Plack.git@devel
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cpanfile support
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>
cat
cpanfile
requires
'Plack',
'1.0000';
>
cpanm
-‐-‐installdeps
.
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cpanm 1.7
9/4, 2013
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Major changes
• Smaller executable size: 350KB -> 230KB
• ♥ Travis CI
• Better prerequisite spec support
• Build Args support
• Uninstall
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# cpanfile
on develop => sub {
requires 'Test::Pod';
recommends 'Devel::NYTProf';
};
> cpanm --installdeps . \
--with-develop \
--with-recommends
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# cpanfile
feature 'sqlite' => sub {
requires 'DBD::SQLite'
recommends 'DBI', 3.1;
};
> cpanm --installdeps . \
--with-feature=sqlite
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# travis.yml
install:
cpanm -nq --installdeps \
--with-develop --with-recommends
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cpanm DBD::mysql \
--configure-args="--with-mysql=/usr/local/
mysql"
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cpanm --uninstall DBI
cpanm -U DBI
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github.com/
miyagawa/cpanminus
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Carton
Bundler for Perl
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Managing CPAN
Dependencies
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Why you need it
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(snip)
http://yapcasia.org/2011/talk/91
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“Upgrading CPAN modules
broke my app”
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Dependencies are
part of your app.
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cpanfile + cpanm
• Simple
• Yet powerful and flexible way to describe
dependencies and version requirements
• Version control cpanfile
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# cpanfile
requires 'Plack', '== 1.0001';
requires 'DBI', '== 3.2';
...
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caveats
• Locking each dependency with specific
version is tedious work
• Can only lock direct dependencies
• MetaCPAN as SPOF
• No easy/reliable way to fallback
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Carton
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Basic idea:
Describe CPAN dependencies
snapshot tarball pathnames
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Built on top of:
cpanfile + cpanm 1.6
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carton 1.0
released in 8/4
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What's new in 1.0
• No Makefile.PL/Build.PL support (cpanfile)
• cpanfile.snapshot (no carton.lock)
• 20x faster tree command
• More reliable version extraction
• carton update, carton bundle
• fatpack executable for bootstrap
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DEMO
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gum.co/BmXz
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Deployment
with Carton
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@local>
carton
install
@local>
git
commit
cpanfile.snapshot
@local>
git
push
@remote>
carton
install
-‐-‐deployment
@remote>
carton
exec
plackup
...
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Example:
github.com/miyagawa/cpanmetadb-perl
capistrano, Server::Starter,
carton, plackup (twiggy)
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PaaS/Cloud
github.com/miyagawa/heroku-buildpack-perl
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http://weblog.bulknews.net
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Support to come!
Dokku, DotCloud, Travis CI,
Cloud Foundry etc.
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github.com/miyagawa/carton
irc.perl.org #carton
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Sneak Preview
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cpanm 1.8
cpanfile 1.1
Carton 1.1
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BETA
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cpanm 1.8
git (+ any URL)
support in index
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cpanfile 1.1
git syntax support
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requires
'Plack',
'1.0000',
git
=>
'git://github.com/plack/Plack.git',
ref
=>
'devel';
carton 1.1
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requires
'Plack',
'1.0011',
dist
=>
'MIYAGAWA/Plack-‐1.0011.tar.gz';
carton 1.1
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requires
'Plack',
'1.0011',
dist
=>
'http://darkpan/Plack-‐1.tar.gz';
carton 1.1
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(demo)
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cpanm 1.8
• Rewrite internals
• Backend API
• Plugin support
• CPAN Testers support (via plugins)
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carton 1.1
• configure args/hints support
• safe exec on development
• remember options (--path etc.)
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Thank you!
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speakerdeck.com
/miyagawa
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