125 lines
4.4 KiB
Markdown
125 lines
4.4 KiB
Markdown
# How to Contribute
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CNI is [Apache 2.0 licensed](LICENSE) and accepts contributions via GitHub
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pull requests. This document outlines some of the conventions on development
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workflow, commit message formatting, contact points and other resources to make
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it easier to get your contribution accepted.
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We gratefully welcome improvements to documentation as well as to code.
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# Certificate of Origin
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By contributing to this project you agree to the Developer Certificate of
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Origin (DCO). This document was created by the Linux Kernel community and is a
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simple statement that you, as a contributor, have the legal right to make the
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contribution. See the [DCO](DCO) file for details.
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# Email and Chat
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The project uses the the cni-dev email list and IRC chat:
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- Email: [cni-dev](https://groups.google.com/forum/#!forum/cni-dev)
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- IRC: #[containernetworking](irc://irc.freenode.org:6667/#containernetworking) channel on freenode.org
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Please avoid emailing maintainers found in the MAINTAINERS file directly. They
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are very busy and read the mailing lists.
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## Getting Started
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- Fork the repository on GitHub
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- Read the [README](README.md) for build and test instructions
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- Play with the project, submit bugs, submit pull requests!
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## Contribution workflow
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This is a rough outline of how to prepare a contribution:
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- Create a topic branch from where you want to base your work (usually branched from master).
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- Make commits of logical units.
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- Make sure your commit messages are in the proper format (see below).
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- Push your changes to a topic branch in your fork of the repository.
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- If you changed code:
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- add automated tests to cover your changes, using the [Ginkgo](http://onsi.github.io/ginkgo/) & [Gomega](http://onsi.github.io/gomega/) style
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- if the package did not previously have any test coverage, add it to the list
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of `TESTABLE` packages in the `test` script.
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- run the full test script and ensure it passes
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- Make sure any new code files have a license header (this is now enforced by automated tests)
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- Submit a pull request to the original repository.
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## How to run the test suite
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We generally require test coverage of any new features or bug fixes.
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Here's how you can run the test suite on any system (even Mac or Windows) using
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[Vagrant](https://www.vagrantup.com/) and a hypervisor of your choice:
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```bash
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vagrant up
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vagrant ssh
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# you're now in a shell in a virtual machine
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sudo su
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cd /go/src/github.com/containernetworking/cni
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# to run the full test suite
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./test
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# to focus on a particular test suite
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cd plugins/main/loopback
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go test
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```
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# Acceptance policy
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These things will make a PR more likely to be accepted:
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* a well-described requirement
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* tests for new code
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* tests for old code!
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* new code and tests follow the conventions in old code and tests
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* a good commit message (see below)
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In general, we will merge a PR once two maintainers have endorsed it.
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Trivial changes (e.g., corrections to spelling) may get waved through.
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For substantial changes, more people may become involved, and you might get asked to resubmit the PR or divide the changes into more than one PR.
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### Format of the Commit Message
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We follow a rough convention for commit messages that is designed to answer two
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questions: what changed and why. The subject line should feature the what and
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the body of the commit should describe the why.
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```
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scripts: add the test-cluster command
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this uses tmux to setup a test cluster that you can easily kill and
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start for debugging.
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Fixes #38
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```
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The format can be described more formally as follows:
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```
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<subsystem>: <what changed>
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<BLANK LINE>
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<why this change was made>
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<BLANK LINE>
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<footer>
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```
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The first line is the subject and should be no longer than 70 characters, the
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second line is always blank, and other lines should be wrapped at 80 characters.
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This allows the message to be easier to read on GitHub as well as in various
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git tools.
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## 3rd party plugins
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So you've built a CNI plugin. Where should it live?
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Short answer: We'd be happy to link to it from our [list of 3rd party plugins](README.md#3rd-party-plugins).
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But we'd rather you kept the code in your own repo.
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Long answer: An advantage of the CNI model is that independent plugins can be
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built, distributed and used without any code changes to this repository. While
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some widely used plugins (and a few less-popular legacy ones) live in this repo,
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we're reluctant to add more.
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If you have a good reason why the CNI maintainers should take custody of your
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plugin, please open an issue or PR.
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