[JIRA] (JENKINS-17411) Pushing a fast-forward merge does not trigger a build

Fri, 29 Mar 2013 09:14:12 -0700

Issue Type: Bug Bug
Assignee: Nicolas De Loof
Components: git, pollscm
Created: 29/Mar/13 4:10 PM
Description:

I have a single job configured to build all branches of a git repo and poll for changes, and I have been experiencing a bug with build triggering.

Steps to reproduce

  1. Create a new repo locally and run these in the repo: 
    touch somefile.txt
git commit -m "Add a file" somefile.txt
  2. Create a new repo on github
  3. Create a Jenkins job with this configuration:
    • Set 'Repository URL' to the new github repo
    • Set 'Branches to build' to '**'
    • Check 'Prune remote branches before build', 'Skip internal tag', 'Clean after checkout', 'Recursively update submodules', 'Wipe out workspace before build'
    • Check 'Poll SCM'
    • Set 'Schedule' to '* * * * *'
  4. Push the master branch of your local repo to github
  5. Add the following shell script as a build step: 
    echo $GIT_BRANCH
  6. Wait for Jenkins build (build #1)
  7. Run these in your local repo: 
    git checkout -b feature master
echo stuff > somefile.txt
git commit -m "Some changes" somefile.txt
git push origin feature
  8. Wait for Jenkins build (build #2)
  9. Run these in your local repo: 
    git checkout master
git merge feature
git push origin master



What happens



After step 6, build #1 prints 'origin/master'.  After step 8, build #2 prints 'origin/feature'.  After step 9, nothing happens in Jenkins.



What should happen



Builds #1 and #2 are fine.  There should be a build #3 after step 9 which prints 'origin/master'.
Project: Jenkins
Priority: Major Major
Reporter: nriffe
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