Create Github PR Jobs on Jenkins

Readme.md

Steps to configure PR jobs on Jenkins This job will run every time someone creates a pull request on your Github repository

1. On Jenkins 
   1. Install Jenkins PR Plugin https://plugins.jenkins.io/ghprb/
   2. Create a freestyle project 
   3. Add Github project link
   4. In Source code management > branch specifier add ${ghprbActualCommit}
   5. Click on advance and add Refspec as "+refs/pull/:refs/remotes/origin/pr/" (because we want to run only for PRs)
   6. In Triggers, select "Github Pull Request Builder"
   7. Check "Use github hooks for build triggering"
   8. Check "Build every pull request automatically without asking (Dangerous!)."
   9. Whitelist target branch, in our case i.e. develop
   10. In build step, add execute shell and write your code which is supposed to be executed. Like running test, posting results etc. 
   11. Click on "Apply" and then "Save"
2. Configurations on GitHub site 

   1. Goto repository > settings > Hooks

   2. Click on "Add webhook"

   3. In URL type <Jenkins Server URL\>/ghprbhook/

      If you get this error,

      HTTP ERROR 403 No valid crumb was included in the request
      

      You probably forget the slash at the end)

   4. Selct Content Type as "application/json"

   5. Under "Which events would you like to trigger this webhook?", select "Let me select individual events."

   6. Select "Pushes" and "Pull requests" from available options Select checkbox in front of "Active" Click on "Create Webhook"