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compose/CONTRIBUTING.md

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Contributing to Compose

Compose is a part of the Docker project, and follows the same rules and principles. Take a read of Docker's contributing guidelines to get an overview.

TL;DR

Pull requests will need:

Development environment

If you're looking contribute to Compose but you're new to the project or maybe even to Python, here are the steps that should get you started.

  1. Fork https://github.com/docker/compose to your username.
  2. Clone your forked repository locally git clone git@github.com:yourusername/compose.git.
  3. Enter the local directory cd compose.
  4. Set up a development environment by running python setup.py develop. This will install the dependencies and set up a symlink from your docker-compose executable to the checkout of the repository. When you now run docker-compose from anywhere on your machine, it will run your development version of Compose.

Running the test suite

Use the test script to run linting checks and then the full test suite against different Python interpreters:

$ script/test

Tests are run against a Docker daemon inside a container, so that we can test against multiple Docker versions. By default they'll run against only the latest Docker version - set the DOCKER_VERSIONS environment variable to "all" to run against all supported versions:

$ DOCKER_VERSIONS=all script/test

Arguments to script/test are passed through to the nosetests executable, so you can specify a test directory, file, module, class or method:

$ script/test tests/unit
$ script/test tests/unit/cli_test.py
$ script/test tests.integration.service_test
$ script/test tests.integration.service_test:ServiceTest.test_containers

Building binaries

script/build-linux will build the Linux binary inside a Docker container:

$ script/build-linux

script/build-osx will build the Mac OS X binary inside a virtualenv:

$ script/build-osx

For official releases, you should build inside a Mountain Lion VM for proper compatibility. Run the this script first to prepare the environment before building - it will use Homebrew to make sure Python is installed and up-to-date.

$ script/prepare-osx

Release process

  1. Open pull request that:
  • Updates the version in compose/__init__.py
  • Updates the binary URL in docs/install.md
  • Adds release notes to CHANGES.md

  1. Create unpublished GitHub release with release notes

  2. Build Linux version on any Docker host with script/build-linux and attach to release

  3. Build OS X version on Mountain Lion with script/build-osx and attach to release as docker-compose-Darwin-x86_64 and docker-compose-Linux-x86_64.

  4. Publish GitHub release, creating tag

  5. Update website with script/deploy-docs

  6. Upload PyPi package

     $ git checkout $VERSION
 $ python setup.py sdist upload