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118 lines
5 KiB
Markdown
118 lines
5 KiB
Markdown
# Contributing to Docker
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Want to hack on Docker? Awesome! Here are instructions to get you started. They are probably not perfect, please let us know if anything feels
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wrong or incomplete.
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## Build Environment
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For instructions on setting up your development environment, please see our dedicated [dev environment setup docs](http://docs.docker.io/en/latest/contributing/devenvironment/).
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## Contribution guidelines
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### Pull requests are always welcome
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We are always thrilled to receive pull requests, and do our best to
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process them as fast as possible. Not sure if that typo is worth a pull
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request? Do it! We will appreciate it.
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If your pull request is not accepted on the first try, don't be
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discouraged! If there's a problem with the implementation, hopefully you
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received feedback on what to improve.
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We're trying very hard to keep Docker lean and focused. We don't want it
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to do everything for everybody. This means that we might decide against
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incorporating a new feature. However, there might be a way to implement
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that feature *on top of* docker.
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### Discuss your design on the mailing list
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We recommend discussing your plans [on the mailing
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list](https://groups.google.com/forum/?fromgroups#!forum/docker-dev)
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before starting to code - especially for more ambitious contributions.
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This gives other contributors a chance to point you in the right
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direction, give feedback on your design, and maybe point out if someone
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else is working on the same thing.
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### Create issues...
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Any significant improvement should be documented as [a github
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issue](https://github.com/dotcloud/docker/issues) before anybody
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starts working on it.
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### ...but check for existing issues first!
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Please take a moment to check that an issue doesn't already exist
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documenting your bug report or improvement proposal. If it does, it
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never hurts to add a quick "+1" or "I have this problem too". This will
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help prioritize the most common problems and requests.
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### Conventions
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Fork the repo and make changes on your fork in a feature branch:
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- If it's a bugfix branch, name it XXX-something where XXX is the number of the
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issue
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- If it's a feature branch, create an enhancement issue to announce your
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intentions, and name it XXX-something where XXX is the number of the issue.
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Submit unit tests for your changes. Go has a great test framework built in; use
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it! Take a look at existing tests for inspiration. Run the full test suite on
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your branch before submitting a pull request.
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Update the documentation when creating or modifying features. Test
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your documentation changes for clarity, concision, and correctness, as
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well as a clean docmuent build. See ``docs/README.md`` for more
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information on building the docs and how docs get released.
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Write clean code. Universally formatted code promotes ease of writing, reading,
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and maintenance. Always run `go fmt` before committing your changes. Most
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editors have plugins that do this automatically, and there's also a git
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pre-commit hook:
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```
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curl -o .git/hooks/pre-commit https://raw.github.com/edsrzf/gofmt-git-hook/master/fmt-check && chmod +x .git/hooks/pre-commit
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```
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Pull requests descriptions should be as clear as possible and include a
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reference to all the issues that they address.
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Code review comments may be added to your pull request. Discuss, then make the
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suggested modifications and push additional commits to your feature branch. Be
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sure to post a comment after pushing. The new commits will show up in the pull
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request automatically, but the reviewers will not be notified unless you
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comment.
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Before the pull request is merged, make sure that you squash your commits into
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logical units of work using `git rebase -i` and `git push -f`. After every
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commit the test suite should be passing. Include documentation changes in the
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same commit so that a revert would remove all traces of the feature or fix.
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Commits that fix or close an issue should include a reference like `Closes #XXX`
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or `Fixes #XXX`, which will automatically close the issue when merged.
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Add your name to the AUTHORS file, but make sure the list is sorted and your
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name and email address match your git configuration. The AUTHORS file is
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regenerated occasionally from the git commit history, so a mismatch may result
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in your changes being overwritten.
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### Approval
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Docker maintainers use LGTM (looks good to me) in comments on the code review
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to indicate acceptance.
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A change requires LGTMs from an absolute majority of the maintainers of each
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component affected. For example, if a change affects docs/ and registry/, it
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needs an absolute majority from the maintainers of docs/ AND, separately, an
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absolute majority of the maintainers of registry
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For more details see [MAINTAINERS.md](hack/MAINTAINERS.md)
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### How can I become a maintainer?
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* Step 1: learn the component inside out
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* Step 2: make yourself useful by contributing code, bugfixes, support etc.
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* Step 3: volunteer on the irc channel (#docker@freenode)
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Don't forget: being a maintainer is a time investment. Make sure you will have time to make yourself available.
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You don't have to be a maintainer to make a difference on the project!
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