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https://github.com/apache/maven-checkstyle-plugin

Apache Maven Checkstyle Plugin
https://github.com/apache/maven-checkstyle-plugin

build-management java maven maven-checkstyle-plugin maven-plugins

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Apache Maven Checkstyle Plugin

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README 

        

Contributing to [Apache Maven Checkstyle Plugin](https://maven.apache.org/plugins/maven-checkstyle-plugin/)

======================



[![ASF Jira](https://img.shields.io/endpoint?url=https%3A%2F%2Fmaven.apache.org%2Fbadges%2Fasf_jira-MCHECKSTYLE.json)][jira]

[![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-checkstyle-plugin.svg?label=Maven%20Central)](https://search.maven.org/artifact/org.apache.maven.plugins/maven-checkstyle-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-checkstyle-plugin//badge.json)](https://github.com/jvm-repo-rebuild/reproducible-central/blob/master/content/org/apache/maven/plugins/maven-checkstyle-plugin/README.md)

[![Jenkins Status](https://img.shields.io/jenkins/s/https/ci-maven.apache.org/job/Maven/job/maven-box/job/maven-checkstyle-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-checkstyle-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 [JIRA account](https://issues.apache.org/jira/).

+ 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 your commit messages are in the proper format. Your commit message should contain the key of the JIRA issue.

```

[MCHECKSTYLE-XXX] - Subject of the JIRA Ticket

 Optional supplemental description.

```

+ 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.

+ Update your JIRA ticket and include a link to the pull request in the ticket.



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



Making Trivial Changes

----------------------



For changes of a trivial nature to comments and documentation, it is not always

necessary to create a new ticket in JIRA.  In this case, it is appropriate to

start the first line of a commit with '(doc)' instead of a ticket number.



Additional Resources

--------------------



+ [Contributing patches](https://maven.apache.org/guides/development/guide-maven-development.html#Creating_and_submitting_a_patch)

+ [Apache Maven Checkstyle JIRA project page][jira]

+ [Contributor License Agreement][cla]

+ [General GitHub documentation](https://help.github.com/)

+ [GitHub pull request documentation](https://help.github.com/send-pull-requests/)

+ [Apache Maven Twitter Account](https://twitter.com/ASFMavenProject)

+ #Maven IRC channel on freenode.org



[jira]: https://issues.apache.org/jira/projects/MCHECKSTYLE/

[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-checkstyle-plugin/job/master/lastCompletedBuild/testReport/

[build]: https://ci-maven.apache.org/job/Maven/job/maven-box/job/maven-checkstyle-plugin/job/master/