# 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](https://github.com/docker/docker/blob/master/CONTRIBUTING.md)
to get an overview.
Pull requests will need:
- [To be signed off](https://github.com/docker/docker/blob/master/CONTRIBUTING.md#sign-your-work)
- A logical series of [well written commits](https://github.com/alphagov/styleguides/blob/master/git.md)
## 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](https://github.com/docker/compose)
to your username.
2. Clone your forked repository locally `git clone email@example.com:yourusername/compose.git`.
3. You must [configure a remote](https://help.github.com/articles/configuring-a-remote-for-a-fork/) for your fork so that you can [sync changes you make](https://help.github.com/articles/syncing-a-fork/) with the original repository.
4. Enter the local directory `cd compose`.
5. 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.
## Install pre-commit hooks
This step is optional, but recommended. Pre-commit hooks will run style checks
and in some cases fix style issues for you, when you commit code.
Install the git pre-commit hooks using [tox](https://tox.readthedocs.io) by
running `tox -e pre-commit` or by following the
[pre-commit install guide](http://pre-commit.com/#install).
To run the style checks at any time run `tox -e pre-commit`.
## Submitting a pull request
See Docker's [basic contribution workflow](https://docs.docker.com/v17.06/opensource/code/#code-contribution-workflow) for a guide on how to submit a pull request for code.
## Documentation changes
Issues and pull requests to update the documentation should be submitted to the [docs repo](https://github.com/docker/docker.github.io). You can learn more about contributing to the documentation [here](https://docs.docker.com/opensource/#how-to-contribute-to-the-docs).
## Running the test suite
Use the test script to run linting checks and then the full test suite against
different Python interpreters:
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/default
Arguments to `script/test/default` are passed through to the `tox` executable, so
you can specify a test directory, file, module, class or method:
$ script/test/default tests/unit
$ script/test/default tests/unit/cli_test.py
$ script/test/default tests/unit/config/config_test.py::ConfigTest
$ script/test/default tests/unit/config/config_test.py::ConfigTest::test_load
## Finding things to work on
[Issues marked with the `exp/beginner` label](https://github.com/docker/compose/issues?q=is%3Aopen+is%3Aissue+label%3Aexp%2Fbeginner) are a good starting point for people looking to make their first contribution to the project.