continues integration

Continues Integration

Johan AluddenTwitter: johanaludden

Mail: me@johanaludden.comBlog: johanaludden.com/weblog

What is Continues Integration?• Compile continuously• Test continuously• Prepare installation continuously• Measure quality continuously• Create documentation continuously

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Components• Developers• Version Control Repository• CI server• Build script• Feedback• Integration Build Machine

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Developers• Makes Changes to code• Runs a private Build• Commits changes

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Version Control Repository• Central point of truth• Good Practice• History• CVS, SVN, Perforce, Git

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CI server• Checks for changes• Retrieves changes• Runs build script(s)• Dashboard

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Build Script• Automated• Complete• Launched from Command line

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Feedback• Email• Instant messaging• SMS• RSS• Sounds• Monitor

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Integration Build Machine• Dedicated• The reference

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Benefits• Risk reduction• Less repetition• Generate Deployable Software• Increase Visibility• More Confidence

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Excuses• Increasing maintenance• Too much change• Frequently failed builds• Additional cost• Should already be made

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First steps• Centralized repository• Compile code• Package binaries• Add testing• Add inspections

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Common Problems• Long build time• Frequently failed builds• To much information• Many target platforms

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Long build time• Make it faster• Split and run in Parallell• Split and run in Sequence

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Frequently failed builds• Are all committed?• Can the devs run on local machine?• Code to fragile?• Tests to fragile?

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To much information• Is all information necessary• What information can be removed• Multiple source of information• Pull not push• Visualize information

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Many target platforms• One CI server per platform• Compile code• Package binaries

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Pipelines• Jobs– Runs in Parallell

• Stages– Runs in sequence– contains 1 or more jobs

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CI servers• CruiseControl• Hudson• Cruise • Bamboo

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Links• Martin Fowler (http://martinfowler.com/articles/continuousIntegration.html)

• Book (http://www.amazon.com/Continuous-Integration-Improving-Software-Reducing/dp/0321336380)

• CruiseControl (http://cruisecontrol.sourceforge.net/)

• Hudson (https://hudson.dev.java.net/)

• WikiPedia (http://en.wikipedia.org/wiki/Continuous_integration/)

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Questions?

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