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Gitlab Merge Request Builder Plugin

A plugin that allows Jenkins to build merge requests.

This plugin fetches the source and target branches of a Gitlab merge request and makes them available to your build via build parameters. Once the build completes, Jenkins will leave a comment on the merge request indicating whether the merge request was successful.

Prerequisites

  • Whilst there is no explicit dependency on the Git plugin, it's strongly recommended that you install it since Jenkins will be unable to fetch the source code for your project.

Installation

  • Ensure that a Jenkins user exists within Gitlab and has access to the repository. Ensure that the user has Reporter level access to the project.
  • Install the plugin in Jenkins.
    • The plugin is hosted on the Jenkins Plugin repository
    • Go to Jenkins -> Manage Plugins -> Available
    • Search for Gitlab Merge Request Builder
    • And install it
    • Ensure you restart Jenkins
  • Go to Manage Jenkins -> Configure System -> Gitlab Merge Request Builder
  • Set the Gitlab Host URL to the base URL of your Gitlab server
  • Set your Jenkins Username for the Jenkins user (defaults to jenkins)
  • Set your Jenkins API Token for the Jenkins user. This can be found by logging into Gitlab as Jenkins and going to the user profile section.
  • Set/change any of the other available parameters as necessary. If you host Gitlab over an SSL connection you may want to enable ignoring certificate errors.
  • Save to preserve your changes.
  • Go to Manage Jenkins -> Configure Global Security and set Markup Formatter to Raw HTML. It will make Jenkins display links in build history properly.

Creating a Job

  • Create a new job by going to New Job
  • Set the Project Name
  • Feel free to specify the GitHub Project URL as the URL for the Gitlab project (if you have the GitHub plugin installed)
  • In the Source Code Management section:
    • Click Git and enter your Repository URL and in Advanced set its Name to origin
    • For merge requests from forked repositories add another repository with Repository URL ${gitlabSourceRepository} and in Advanced set Name to ${gitlabSourceName}
    • In Branch Specifier enter origin/${gitlabSourceBranch} or for merge requests from forked repositories enter ${gitlabSourceName}/${gitlabSourceBranch}
    • In the Additional Behaviours section:
      • Click the Add drop down button and the Merge before build item
      • Specify the name of the repository as origin (if origin corresponds to Gitlab) and enter the Branch to merge to as ${gitlabTargetBranch}
      • Ensure Prune stale remote-tracking branches is not added
  • In the Build Triggers section:
    • Check the Gitlab Merge Requests Builder
    • Enter the Gitlab Project Path, this might be something like your_group/your_project for Gitlab URL http://git.tld/your_group/your_project
    • The Target Branch Regex may be configured to whitelist this job for certain target branches. If left empty, every valid merge request for the configured project path will trigger this job.
    • The Use HTTP(S) URL checkbox should be used if you want Jenkins to clone/fetch using HTTP(S) instead of SSH.
  • Configure any other pre build, build or post build actions as necessary
  • Save to preserve your changes

You can trigger a job a manually by clicking This build is parameterized and adding the relevant build parameters. These include:

  • gitlabSourceRepository (for MRs from forked repos)
  • gitlabSourceName (for MRs from forked repos)
  • gitlabSourceBranch
  • gitlabTargetBranch
  • gitlabMergeRequestId

Note that a manually triggered build will not add build triggered/succeeded/failed comments to the merge request.

Contributing

  • Check out the latest master to make sure the feature hasn't been implemented or the bug hasn't been fixed yet
  • Check out the issue tracker to make sure someone already hasn't requested it and/or contributed it
  • Fork the project
  • Start a feature/bugfix branch
  • Commit and push until you are happy with your contribution
  • Make sure to add tests for it. This is important so I don't break it in a future version unintentionally.
  • Please try not to mess with the version, or history. If you want to have your own version, or is otherwise necessary, that is fine, but please isolate to its own commit so I can cherry-pick around it.

Copyright

Copyright (c) 2013 Tim Olshansky. See LICENSE for further details.

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A plugin that allows jenkins to build merge requests in Gitlab

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