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Contributing to the Code Coverage API plug-in

This document provides information about contributing code to Jenkins' Code Coverage API plug-in.

❗ There's a lot more to the Jenkins project than just code. For information on contributing to the Jenkins' project overall, check out Jenkins' contributing landing page.

Beginner Topics

If you don't have a specific problem or task in mind, i.e., you simply want to participate in this open source project I would suggest look at the open newbie friendly issues in our issues tracker. I marked several newbie friendly issues with the label Hacktoberfest since they can also be contributed in the Hacktoberfest event. These are a good starting point to get in touch with this Jenkins plugin. If you already have some experience with the plugin you can also fix one of the other issues.

Getting started

Setup your development environment as described in Development environment for Jenkins' Warnings and Code Coverage Plugins.

Coding Guidelines

Start reading the code, and you'll get the hang of it. A complete description of the coding guidelines is part of a separate GitHub repository that I am also using for my lectures about software development.

For IntelliJ IDEA users: If you use the provided development environment then the coding style is stored in configuration files below the codingstyle/.idea and codingstyle/etc folders. When you import all projects into IntelliJ then this style will be used automatically.

Moreover, (since this project is about static code analysis 😉) a configuration for the following static code analysis tools is defined in the POM (and the etc and .idea folders of the codingstyle module):

This configuration will be picked up automatically if you build the project using Maven. If you install the CheckStyle plugin of IntelliJ then the correct set of CheckStyle rules will used automatically. Moreover, the code formatter and the inspection rules will be automatically picked up by IntelliJ.

Proposing Changes

All proposed changes are submitted and code reviewed using the GitHub Pull Request process.

To submit a pull request:

  1. Commit changes and push them to your fork on GitHub. It is a good practice is to create branches instead of pushing to master.
  2. In GitHub Web UI click the New Pull Request button.
  3. Select warnings-ng-plugin as base fork and master as base, then click Create Pull Request.
  4. Fill in the Pull Request description. It should reflect the changes, the reason behind the changes, and if available a reference to the Jenkins ticket in our issue tracker.
  5. Click Create Pull Request.
  6. Wait for CI results and reviews.
  7. Process the feedback (see previous step). If there are changes required, commit them in your local branch and push them again to GitHub. Your pull request will be updated automatically. Review comments for changed lines will become outdated.

Once your Pull Request is ready to be merged, the repository maintainer will integrate it. There is no additional action required from pull request authors at this point.

Copyright

The Code Coverage API plugin is licensed under MIT license. We consider all contributions as MIT unless it's explicitly stated otherwise. MIT-incompatible code contributions will be rejected. Contributions under MIT-compatible licenses may be also rejected if they are not ultimately necessary.

Continuous Integration

The Jenkins project has a Continuous Integration server... powered by Jenkins, of course. The CI job for this project is located at ci.jenkins.io.