1. Jenkins User Conference Jenkins User Conference San Francisco, Sept 30 2012 #jenkinsconf Take Control. Write a Plugin. Part II Baruch Sadogursky JFrog www.jfrog.com

2. About me Developer Advocate @JFrog Job definition: Write code Talk about it github.com/jbaruch @jbaruch

3. With Jenkins from day 1 Jenkins Artifactory Plugin Hosted JUC Israel repo.jenkins-ci.org JavaOne DEMOzone JFrog & Jenkins

4. Vote and guessing Working with remote agents Working in multiple operation systems Creating UI using Groovy Writing custom Jelly(?) tags Maintaining backwards compatibility Agenda

5. Vote and guessing Working with remote agents Working in multiple operation systems Creating UI using Groovy Writing custom Jelly(?) tags Maintaining backwards compatibility Agenda

6. Who saw “Take Control. Write a Plugin” session on YouTube?“Take Control. Write a Plugin” session on YouTube Let me guess… one or two hands… First, let’s vote

7. PREVIOUSLY IN “TAKE CONTROL. WRITE A PLUGIN”… “Hello, my name is Noam Tenne”

8. What you can do with plugins What you can’t do with plugins Plugins statistics Overview – Why plugins

9. UI SCM Build Processes Slave management Tooling... Many, many, more You can even create new extension points! What can I extend?

10. IDE All majors have good support We love IntelliJ IDEA Build tool Can be Maven or Gradle Environment

11. Target: Rewarding failing builds with insulting mockery Global configuration: Motivation phrase Project configuration: Is motivator enabled Outcome: Message appears in log after failure The “Motivation” Plugin

12. BACK TO OUR AGENDA Nowdays…

13. Vote and guessing Working with remote agents Working in multiple operation systems Creating UI using Groovy Writing custom Jelly(?) tags Maintaining backwards compatibility Agenda

14. Jenkins has remote agents! Working with remote agents

15. Send closures to remote agents hudson.remoting.Callable Working with remote agents Java Serialization

16. Poor guy’s Java closure Usually anonymous inner class (not always) Closure

17. Channel? Cast your bread on the waters

18. Represents a communication channel to the remote peer Obtain from: Channel

19. Where is the file? Distribution Abstractions – FilePath

20. hudson.FilePath Much like java.util.File Consider pushing logic to the file Use FilePath.act(FileCallable) Distribution Abstractions – FilePath

21. Launch stuff remotely! Distribution Abstractions – Launcher

22. hudson.Launcher Much like java.lang.ProcessBuilder Pick your environment variables wisely! Distribution Abstractions – Launcher

23. Vote and guessing Working with remote agents Working in multiple operation systems Creating UI using Groovy Writing custom Jelly(?) tags Maintaining backwards compatibility Agenda

24. WORA. You know. But. / vs \.sh vs. bat Quotes around commands Permissions (wait for it…) Working in multiple OSs

25. Executing file… remotely… platform independent… Running script…

26. Can You Spot The Error? Executed locally!

27. Use FilePath – it will take care of all the details! Execute FilePath.act(FileCallable) If you need the File API, invoke() method has it, converted to remote file properly Going Remote with File

28. Permissions Dance

29. Vote and guessing Working with remote agents Working in multiple operation systems Creating UI using Groovy Writing custom Jelly(?) tags Maintaining backwards compatibility Agenda

30. First, let’s look at the docs: Creating UI using Groovy

31. Analogous to Jelly Can use Jelly tags and libraries Kohsuke: Creating UI using Groovy WhenWhat Lots of program logicGroovy Lots of HTML layout markupJelly

32. Analogous to Jelly Can use Jelly tags and libraries me: Creating UI using Groovy WhenWhat Always!Groovy

33. Jelly: Groovy: Creating UI using Groovy

34. Real code Debuggable, etc. (stay tuned…)

35. Vote and guessing Working with remote agents Working in multiple operation systems Creating UI using Groovy Writing custom Jelly(?) tags Maintaining backwards compatibility Agenda

36. Documentation: Writing custom Jelly(?) tags

39. Simple as 1,2… that’s it. Writing custom Jelly Groovy tags

40. 1. Implement

41. 2. Use!

42. Vote and guessing Working with remote agents Working in multiple operation systems Creating UI using Groovy Writing custom Jelly(?) tags Maintaining backwards compatibility Agenda

43. Back to Motivation plugin… Maintaining backwards compatibility

44. Rename defaultMotivatingMessage to motivatingMessage What happens to existing configuration on users machines? Refactoring!

45. Register field (or class) alias In Initializer that runs before plugins started More complex cases might reqiure XStream converter XStream Aliasing To The Rescue

46. See you at our DEMOzone! Thank you!

47. Thank You To Our Sponsors