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Contributing to [Apache Maven Shade Plugin](https://maven.apache.org/plugins/maven-shade-plugin/)
======================

[![Apache License, Version 2.0, January 2004](https://img.shields.io/github/license/apache/maven.svg?label=License)][license]
[![Maven Central](https://img.shields.io/maven-central/v/org.apache.maven.plugins/maven-shade-plugin.svg?label=Maven%20Central)](https://search.maven.org/artifact/org.apache.maven.plugins/maven-shade-plugin)
[![Reproducible Builds](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/jvm-repo-rebuild/reproducible-central/master/content/org/apache/maven/plugins/maven-shade-plugin/badge.json)](https://github.com/jvm-repo-rebuild/reproducible-central/blob/master/content/org/apache/maven/plugins/maven-shade-plugin/README.md)
[![Jenkins Status](https://img.shields.io/jenkins/s/https/ci-maven.apache.org/job/Maven/job/maven-box/job/maven-shade-plugin/job/master.svg?)][build]
[![Jenkins tests](https://img.shields.io/jenkins/t/https/ci-maven.apache.org/job/Maven/job/maven-box/job/maven-shade-plugin/job/master.svg?)][test-results]


You have found a bug, or you have an idea for a cool new feature? Contributing
code is a great way to give something back to the open source community. Before
you dig right into the code, there are a few guidelines that we need
contributors to follow so that we can have a chance of keeping on top of
things.

Getting Started
---------------

+ Make sure you have a [GitHub account](https://github.com/signup/free).
+ If you're planning to implement a new feature, it makes sense to discuss your changes 
  on the [dev list][ml-list] first. 
  This way you can make sure you're not wasting your time on something that isn't 
  considered to be in Apache Maven's scope.
+ Submit a ticket for your issue, assuming one does not already exist.
  + Clearly describe the issue, including steps to reproduce when it is a bug.
  + Make sure you fill in the earliest version that you know has the issue.
+ Fork the repository on GitHub.

Making and Submitting Changes
--------------

We accept Pull Requests via GitHub. The [developer mailing list][ml-list] is the
main channel of communication for contributors.  
There are some guidelines which will make applying PRs easier for us:
+ Create a topic branch from where you want to base your work (this is usually the master branch).
  Push your changes to a topic branch in your fork of the repository.
+ Make commits of logical units.
+ Respect the original code style: by using the same [codestyle][code-style],
  patches should only highlight the actual difference, not being disturbed by any formatting issues:
  + Only use spaces for indentation.
  + Create minimal diffs - disable on save actions like reformat source code or organize imports. 
    If you feel the source code should be reformatted, create a separate PR for this change.
  + Check for unnecessary whitespace with `git diff --check` before committing.
+ Make sure you have added the necessary tests (JUnit/IT) for your changes.
+ Run all the tests with `mvn -Prun-its verify` to assure nothing else was accidentally broken.
+ Submit a pull request to the repository in the Apache organization.

If you plan to contribute on a regular basis, please consider filing a [contributor license agreement][cla].

Developer Tips
--------------

If your machine is sufficiently powerful, and you want to parallelize the IT execution to validate the build
before a PR you can set the concurrency in `MAVEN_OPTS`:

````
MAVEN_OPTS=-Dinvoker.parallelThreads=2 mvn verify -Prun-its
````

You can also run a single IT test using:

````
mvn verify -Prun-its -Dinvoker.test=myitproject
````

Additional Resources
--------------------

+ [Contributing patches](https://maven.apache.org/guides/development/guide-maven-development.html#Creating_and_submitting_a_patch)
+ [Contributor License Agreement][cla]
+ [General GitHub documentation](https://help.github.com/)
+ [GitHub pull request documentation](https://help.github.com/send-pull-requests/)
+ [Apache Maven X Account](https://x.com/ASFMavenProject)
+ [Apache Maven Bluesky Account](https://bsky.app/profile/maven.apache.org)
+ [Apache Maven Mastodon Account](https://mastodon.social/deck/@ASFMavenProject@fosstodon.org)
+ [Slack channel for regular contributors](https://infra.apache.org/slack.html)


[license]: https://www.apache.org/licenses/LICENSE-2.0
[ml-list]: https://maven.apache.org/mailing-lists.html
[code-style]: https://maven.apache.org/developers/conventions/code.html
[cla]: https://www.apache.org/licenses/#clas
[maven-wiki]: https://cwiki.apache.org/confluence/display/MAVEN/Index
[test-results]: https://ci-maven.apache.org/job/Maven/job/maven-box/job/maven-shade-plugin/job/master/lastCompletedBuild/testReport/
[build]: https://ci-maven.apache.org/job/Maven/job/maven-box/job/maven-shade-plugin/job/master/
