Continuous Integration In A PHP World

Continuous integration in a PHP World PHP Barcelona Conference 2009

Davide Mendolia • http://davidemendolia.blogspot.com • dmendolia@php.net or @davideme • lead developer APM (Alternative PHP Monitor) • Contributor on php-benchmark • http://www.php-ci.net • Working @

What's continuous integration ?

What's continuous integration ? • Is not just tools, Is also a concept • Goal • build a better software • improve your development

Concept • Martin Fowler in 01 May 06 • “software development practice” • The term 'Continuous Integration' originated with the Extreme Programming development process

Who’s Martin Fowler ? • http://martinfowler.com/ • ThoughtWorks • Books • Agile development

Which “software development practice” we know ? • Agile software development • Scrum • Extreme Programming • Feature Driven Development • ... • Waterfall model

Requirements • > 1 contributor on the project • “contributor” : developer, tester, QA responsible, ... • > 1 man/day of work

What’s integration means here?

What’s integration means here? • merging my work with the work of others • Source code • Database • Resources • ....

Classic method 1. I took a task 2. I checkout or update my code with the corresponding branch 3. I develop 4. I test if it works 5. I commit

Continuous Integration method 1. Classic Method 2. Regularly, a server start a build a. checkout or update the corresponding branch b. test if it works c. stamp if the build fail or success

Ok, but where is the difference • First : it test the “integration” of your code with the code of others success • Second : it oblige you to write test executable by a machine (repeatable) • Second bis : if you do acceptance test. It oblige you to write an application installable by a machine

Cool, but what’s the beneﬁt ? • never gets so far away from that base that it takes very long to integrate back with it. • Link to scrum methodology • Less time is spent trying to ﬁnd bugs

Objectives • Unit tests • End-to-End(Acceptance) tests • Database tests • Quality Assurance • Software metrics • Code duplication • Coding standard

So, yes you convinced me where I should start ?

Tools • Unit Test : SimpleTest, PHPUnit • Acceptance Test : Selenium • Software Metrics : PHPmd, pdepend, phpcpd • Coding Standard : PHP_CodeSniffer

Prepare your repository • be able to launch the build in one command line call • write a script • Shell Script, Ant, PHP, Phing, Maven for PHP • include resources needed in your repository or available trough your script • Test It!!!

Which server of “continuous integration” we have ? • A lot but most of them are written in Java • Some are better integrate with PHP context

Which server of “continuous integration” we have in PHP ? • CruiseControl (phpUnderControl) • Xinc • Hudson • Bamboo

CruiseControl • Java • ThoughtWorks • Open source • Mother of all CI servers

CruiseControl

phpUnderControl • Based on CruiseControl • Java and PHP • http://phpundercontrol.org • Opensource • PHP dedicated

phpUnderControl

Xinc • Xinc is not CruiseControl • PHP • http://code.google.com/p/xinc/ • Open source • PHP dedicated

Hudson • Java • Difference between build failure and • More user friendly rules failures • Extendable • Not only dedicated to PHP • Active development • Open Source • Sun Continuous Integration Server

Hudson

Bamboo • Atlassian • Commercial • Integration with PHPUnit • Java

Bamboo

Demo ?

Which one is the best ? • The one that ﬁt your need • Test different tools • Give feedback

Good rules • Everyone Commits To the Mainline Every Day • Every Commit Should Build the Mainline on an Integration Machine • Keep your build as fast as possible

Remarks • Don’t expect that your build will success or don’t communicate about that from the start • all those cliches about Rome's build schedule apply. • choose speciﬁc point to test or objectives to reach

Conclusion Continuous Integration reduced risk of fail!

Question ?

Thanks • Ján Lukács for Quitter Icon • Robert S. Donovan for toolbox picture

References • http://en.wikipedia.org/wiki/ Continuous_integration • http://www.webopedia.com/TERM/E/ Extreme_Programming.html • http://www.jetbrains.com/devnet/academy/ concepts/cont_integration.html

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Continuous Integration In A PHP World

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