CPANci: Continuous Integration for CPAN

Testing CPANin the

21st CenturyMike Friedman

(friedo)

YAPC::NA 2013 Austin, TX

Tuesday, June 4, 13

A lengthy series of bad ideas and stupid

questions.

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Tuesday, June 4, 13

Stupid Question No. 1

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What’s this about, anyway?

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What’s this about, anyway?

CPANci

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A Brief History

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A Brief History

•December 18, 1987

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A Brief History

•December 18, 1987•Perl 1.000 released.

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A Brief History

•December 18, 1987•Perl 1.000 released.•TAP invented.

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The Test Anything Protocol

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The Test Anything Protocol

1..42ok 1 the thing looks good!ok 2ok 3 $beer isa $drinknot ok 4 too much $beernot ok 5 $me->vomit( 'now' )...

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A Brief History

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A Brief History

•October 17, 1994

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A Brief History

•October 17, 1994•Perl 5.000 released.

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A Brief History

•October 17, 1994•Perl 5.000 released.•Perl has a module system.

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# from thisrequire "funcs.pl";

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# from thisrequire "funcs.pl";

# to thisuse My::Module;

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# but under the hoodBEGIN { require My::Module; My::Module->import;};

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A Brief History

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A Brief History

•October 26, 1995

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A Brief History

•October 26, 1995•CPAN established.

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A Brief History

•October 26, 1995•CPAN established.•Perl modules are available.

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A Brief History

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A Brief History

•May 15, 1997

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A Brief History

•May 15, 1997•Perl 5.004 released.

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A Brief History

•May 15, 1997•Perl 5.004 released.•CPAN.pm is in the core.

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# the dark art$ perl -MCPAN -e 'install Foo'

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A Brief History

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A Brief History

•May, 1998

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A Brief History

•May, 1998•CPAN Testers conceived

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A Brief History

•May, 1998•CPAN Testers conceived•Automated feedback for authors

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A Brief History

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A Brief History

•November 15, 2003

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A Brief History

•November 15, 2003•Perl 5.6.2 released.

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A Brief History

•November 15, 2003•Perl 5.6.2 released.•Test::More is in the core.

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use Test::More tests => 3;

ok( 42 );is( $foo, 'my value' );isnt( 'foo', 'bar' );

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A Brief History

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A Brief History

•August 6, 2012

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A Brief History

•August 6, 2012•Mike goes to work for 10gen

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WEB SCALE!!!!11Tuesday, June 4, 13

WEB SCALE!!!!11

LOLTuesday, June 4, 13

Tuesday, June 4, 13

Bad Idea No. 1

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Bad Idea No. 1Come up with a cool Perl MongoDB project

to show off at YAPC!

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It'll be fun!

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It'll be fun!promise!

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CPAN Testers is Wonderful and Amazing

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Disadvantages:

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Disadvantages:Not real time

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Disadvantages:Not real timeNot consistent

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Disadvantages:Not real timeNot consistentPolluted / Inconsistent environments

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Disadvantages:Not real timeNot consistentPolluted / Inconsistent environmentsNot all versions on all platforms

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I want Continuous Integrationfor the entire CPAN.

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Bad Idea No. 2

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CPANci.org

Bad Idea No. 2

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Stupid Question No. 3How can we test CPAN without the

disadvantages of CPAN Testers?

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Postulate:

Every CPAN distribution must be tested in isolation, on a virgin Perl installation untouched by human hands.

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Postulate:

Every CPAN distribution must be tested in isolation, on a virgin Perl installation untouched by human hands.

So how do we do that?

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perlbrew

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Virtualization

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Virtualization

Whoa!

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Bad Idea No. 3

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•Create an EC2 image

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•Create an EC2 image•Put perlbrew on it

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•Create an EC2 image•Put perlbrew on it•Install every Perl locally

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•Create an EC2 image•Put perlbrew on it•Install every Perl locally•Boot an instance for every uploaded distribution

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•Create an EC2 image•Put perlbrew on it•Install every Perl locally•Boot an instance for every uploaded distribution•Install needed dependencies for the distribution

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•Create an EC2 image•Put perlbrew on it•Install every Perl locally•Boot an instance for every uploaded distribution•Install needed dependencies for the distribution•Run the tests and report the results

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•Create an EC2 image•Put perlbrew on it•Install every Perl locally•Boot an instance for every uploaded distribution•Install needed dependencies for the distribution•Run the tests and report the results•Shut down the instance

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Stupid Question No. 4How can we do this on one instance?

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local::lib

cpanminus

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App::cpanminus

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App::cpanminus

•Self-contained

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App::cpanminus

•Self-contained•That is, the cpanm script is self-contained

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App::cpanminus

•Self-contained•That is, the cpanm script is self-contained•via App::FatPacker

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App::cpanminus

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App::cpanminusThat means the same cpanm can be run by any perl

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App::cpanminusThat means the same cpanm can be run by any perl

perlbrew switch mastercurl -L http://cpanmin.us/ | perl - App::cpanminusln -s ~/perl5/perlbrew/perls/master/bin/cpanm ./cpanm

~/perl5/perlbrew/perls/perl-5.8.9/bin/perl cpanm~/perl5/perlbrew/perls/perl-5.10.1/bin/perl cpanm~/perl5/perlbrew/perls/perl-5.12.5/bin/perl cpanm~/perl5/perlbrew/perls/perl-5.14.4/bin/perl cpanm~/perl5/perlbrew/perls/perl-5.16.3/bin/perl cpanm~/perl5/perlbrew/perls/perl-5.18.0/bin/perl cpanm~/perl5/perlbrew/perls/perl-5.19.0/bin/perl cpanm

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http://cpanmin.us

http://cpanmin.us

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•Use perlbrew to install a "master" perl

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•Use perlbrew to install a "master" perl•Use it again to install "virgin" perls of every major version

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•Use perlbrew to install a "master" perl•Use it again to install "virgin" perls of every major version•Use the master perl to install everything from CPAN that makes CPANci work

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•Use perlbrew to install a "master" perl•Use it again to install "virgin" perls of every major version•Use the master perl to install everything from CPAN that makes CPANci work•For each distribution, create a temp directory

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•Use perlbrew to install a "master" perl•Use it again to install "virgin" perls of every major version•Use the master perl to install everything from CPAN that makes CPANci work•For each distribution, create a temp directory•Tell cpanminus to install dependencies there, as if for local::lib

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•Use perlbrew to install a "master" perl•Use it again to install "virgin" perls of every major version•Use the master perl to install everything from CPAN that makes CPANci work•For each distribution, create a temp directory•Tell cpanminus to install dependencies there, as if for local::lib•Run tests and report results

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•Use perlbrew to install a "master" perl•Use it again to install "virgin" perls of every major version•Use the master perl to install everything from CPAN that makes CPANci work•For each distribution, create a temp directory•Tell cpanminus to install dependencies there, as if for local::lib•Run tests and report results•Delete temp directory, leaving each perl untouched!

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What does that look like?

The "fetcher" grabs the latest distribution URLs from MetaCPAN's RSS feed.

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We retrieve the distribution metadata from the MetaCPAN JSON API and saved it to

MongoDB.

Then we start the Installer.

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We download the distribution tarball to a temp file.

Then the fun stuff starts to happen.

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We extract the archive in a specific "work" directoryfor each perl.

Then create a temp directory for building and installingdependencies.

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Use a specific perl binary to run cpanm and install dependencies, with no tests, to the temp

directory.

Then we parse the cpanm log on stderrTuesday, June 4, 13

What does that look like? "deps" : { "log" : [ { "indent" : 0, "type" : "working-on", "line" : "--> Working on .\n" }, { "line" : "Configuring Lingua-EN-NamedEntity-1.92 ... OK\n", "type" : "config", "indent" : 1 }, { "type" : "found-deps", "indent" : 1, "line" : "==> Found dependencies: Lingua::Stem::En, DB_File, LWP::Simple\n" }, { "indent" : 1, "type" : "working-on", "line" : "--> Working on Lingua::Stem::En\n" }, { "indent" : 2, "type" : "fetch", "line" : "Fetching http://www.cpan.org/authors/id/S/SN/SNOWHARE/Lingua-Stem-0.84.tar.gz ... OK\n" },

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http://www.cpan.org/authors/id/S/SN/SNOWHARE/Lingua-Stem-0.84.tar.gz





Use a specific perl to run each test file,save the TAP output and any errors, and

use the exit status to determine if it passed.

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Parse the TAP output of each test into a structure which can be saved in MongoDB

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What does that look like? "name" : "t/05depth.t", "lines" : [ { "ok" : true, "text" : "1..12", "type" : "plan" }, { "number" : 1, "ok" : true, "type" : "test", "desc" : "new object", "text" : "ok 1 - new object" }, { "ok" : true, "number" : 2, "desc" : "depth", "type" : "test", "text" : "ok 2 - depth" }, { "desc" : "depth", "text" : "ok 3 - depth", "type" : "test", "number" : 3, "ok" : true }, { "type" : "test", "desc" : "depth", "text" : "ok 4 - depth", "ok" : true, "number" : 4 }, { "number" : 5, "ok" : true, "text" : "ok 5 - depth", "desc" : "depth", "type" : "test" }, { "number" : 6, "ok" : true, "type" : "test", "desc" : "depth", "text" : "ok 6 - depth" },

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•This is JSON

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•This is JSON•Stored in MongoDB

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•This is JSON•Stored in MongoDB•But it's also TAP!

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Bad Idea No. 4

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Bad Idea No. 4

LIVE DEMO!Tuesday, June 4, 13

The future?

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The future?•Integration with Pinto

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The future?•Integration with Pinto•Integration with Stratopan

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The future?•Integration with Pinto•Integration with Stratopan•All kinds of cool statistics on the website

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The future?•Integration with Pinto•Integration with Stratopan•All kinds of cool statistics on the website•Organizations using CPANci for their internal DarkPANs

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Final Thoughts

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Final Thoughts

•Play with new toys.

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Final Thoughts

•Play with new toys.•Think before you code.

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Final Thoughts

•Play with new toys.•Think before you code.•Have bad ideas.

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Final Thoughts

•Play with new toys.•Think before you code.•Have bad ideas.•Ask stupid questions.

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Final Thoughts

•Play with new toys.•Think before you code.•Have bad ideas.•Ask stupid questions.•Have fun.

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Stupid Questions?

Mike Friedman(friedo)

[email protected]://github.com/friedo/cpanci

Tuesday, June 4, 13

mailto:[email protected]

mailto:[email protected]

https://github.com/friedo/cpanci

https://github.com/friedo/cpanci

CPANci: Continuous Integration for CPAN

Technology

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