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  1. Jenkins
  2. JENKINS-44598

git workspace should be reset before build PR merged with base branch

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    • Icon: Bug Bug
    • Resolution: Unresolved
    • Icon: Major Major
    • None
    • OS: CentOS 7.3.1611
      Jenkins: 2.46.2
      GitHub Branch Source Plugin: 2.0.6
      git version: 1.8.3.1

      The plugin attempts to merge the PR and the base branch before build. However, if git-merge introduces a conflict, the unmerged files will be left in the PR's git workspace, which causes git-merge in the following builds always fail, because the conflict is not solved.

      Here's the log snippets:

      For build #3, which introduces the merge conflict

      > git fetch --tags --progress git@github.mycompany.com:SERVER_REPO.git +refs/pull//head:refs/remotes/origin/pr/
       Merging dev_6_2 commit fc999a1dae8861c1e5d3c21c8deb81f1e7bdf3a8 into PR head commit 5042e295186f8fe4bbb61ac97d97d69d1932912c
       > git config core.sparsecheckout # timeout=10
       > git checkout -f 5042e295186f8fe4bbb61ac97d97d69d1932912c
       > git merge fc999a1dae8861c1e5d3c21c8deb81f1e7bdf3a8 # timeout=10
       > git config core.sparsecheckout # timeout=10
       > git checkout -f 5042e295186f8fe4bbb61ac97d97d69d1932912c
      GitHub has been notified of this commit’s build result
      hudson.plugins.git.GitException: Command "git merge fc999a1dae8861c1e5d3c21c8deb81f1e7bdf3a8" returned status code 1:
       stdout: Auto-merging docker-environment/ansible/group_vars/all.yml
       CONFLICT (add/add): Merge conflict in docker-environment/ansible/group_vars/all.yml
       Automatic merge failed; fix conflicts and then commit the result.
      stderr: 
       at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandIn(CliGitAPIImpl.java:1877)
       at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandIn(CliGitAPIImpl.java:1845)
       at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandIn(CliGitAPIImpl.java:1841)
       at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommand(CliGitAPIImpl.java:1486)
       at org.jenkinsci.plugins.gitclient.CliGitAPIImpl$3.execute(CliGitAPIImpl.java:621)
       at org.jenkinsci.plugins.github_branch_source.GitHubSCMSource$MergeWith.decorateRevisionToBuild(GitHubSCMSource.java:1003)
       at hudson.plugins.git.GitSCM.determineRevisionToBuild(GitSCM.java:1015)
       at hudson.plugins.git.GitSCM.checkout(GitSCM.java:1108)
       at org.jenkinsci.plugins.workflow.steps.scm.SCMStep.checkout(SCMStep.java:109)
       at org.jenkinsci.plugins.workflow.cps.CpsScmFlowDefinition.create(CpsScmFlowDefinition.java:130)
       at org.jenkinsci.plugins.workflow.multibranch.SCMBinder.create(SCMBinder.java:107)
       at org.jenkinsci.plugins.workflow.job.WorkflowRun.run(WorkflowRun.java:234)
       at hudson.model.ResourceController.execute(ResourceController.java:98)
       at hudson.model.Executor.run(Executor.java:405)
       Finished: FAILURE
      

      For the following build #4, #5 and so on, the merge always fails

      > git fetch --tags --progress git@github.mycompany.com:SERVER_REPO.git +refs/pull//head:refs/remotes/origin/pr/
       Merging dev_6_2 commit fc999a1dae8861c1e5d3c21c8deb81f1e7bdf3a8 into PR head commit 32fe21329c3f0349347d029917ba29a39fc0364a
       > git config core.sparsecheckout # timeout=10
       > git checkout -f 32fe21329c3f0349347d029917ba29a39fc0364a
       > git merge fc999a1dae8861c1e5d3c21c8deb81f1e7bdf3a8 # timeout=10
       > git config core.sparsecheckout # timeout=10
       > git checkout -f 32fe21329c3f0349347d029917ba29a39fc0364a
      GitHub has been notified of this commit’s build result
      hudson.plugins.git.GitException: Command "git merge fc999a1dae8861c1e5d3c21c8deb81f1e7bdf3a8" returned status code 128:
       stdout: 
       stderr: error: 'merge' is not possible because you have unmerged files.
       hint: Fix them up in the work tree,
       hint: and then use 'git add/rm <file>' as
       hint: appropriate to mark resolution and make a commit,
       hint: or use 'git commit -a'.
       fatal: Exiting because of an unresolved conflict.
      at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandIn(CliGitAPIImpl.java:1877)
       at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandIn(CliGitAPIImpl.java:1845)
       at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandIn(CliGitAPIImpl.java:1841)
       at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommand(CliGitAPIImpl.java:1486)
       at org.jenkinsci.plugins.gitclient.CliGitAPIImpl$3.execute(CliGitAPIImpl.java:621)
       at org.jenkinsci.plugins.github_branch_source.GitHubSCMSource$MergeWith.decorateRevisionToBuild(GitHubSCMSource.java:1003)
       at hudson.plugins.git.GitSCM.determineRevisionToBuild(GitSCM.java:1015)
       at hudson.plugins.git.GitSCM.checkout(GitSCM.java:1108)
       at org.jenkinsci.plugins.workflow.steps.scm.SCMStep.checkout(SCMStep.java:109)
       at org.jenkinsci.plugins.workflow.cps.CpsScmFlowDefinition.create(CpsScmFlowDefinition.java:130)
       at org.jenkinsci.plugins.workflow.multibranch.SCMBinder.create(SCMBinder.java:107)
       at org.jenkinsci.plugins.workflow.job.WorkflowRun.run(WorkflowRun.java:234)
       at hudson.model.ResourceController.execute(ResourceController.java:98)
       at hudson.model.Executor.run(Executor.java:405)
       Finished: FAILURE
      

       

      Then this build will be stuck in this situation unless we manually issue 'git reset HEAD --hard' in that git workspace.

        1. image-2023-06-20-09-50-58-110.png
          93 kB
          Krzysztof
        2. image-2023-07-13-08-40-45-282.png
          13 kB
          Krzysztof
        3. Screen Shot 2017-11-07 at 11.28.43.png
          108 kB
          Stephen Connolly

            Unassigned Unassigned
            asouchang Asou Chang
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            9 Vote for this issue
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              Created:
              Updated: