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Contributing to hub
===================
Contributions to this project are [released](https://help.github.com/articles/github-terms-of-service/#6-contributions-under-repository-license) to the public under the [project's open source license](LICENSE).
This project adheres to a [Code of Conduct][code-of-conduct]. By participating, you are expected to uphold this code.
[code-of-conduct]: ./CODE_OF_CONDUCT.md
You will need:
1. Go 1.8+
1. Ruby 1.9+ with Bundler
2. git 1.8+
3. tmux & zsh (optional) - for running shell completion tests
## What makes a good hub feature
hub is a tool that wraps git to provide useful integration with GitHub. A new
feature is a good idea for hub if it improves some workflow for a GitHub user.
* A feature that encapsulates a git workflow *not specific* to GitHub is **not**
a good fit for hub, since something like that is best implemented as an
external script.
* If you're proposing to add a new custom command such as `hub foo`, please
research if there's a possibility that such a custom command could conflict
with other commands from popular 3rd party git projects.
## How to install dependencies and run tests
1. [Clone the project](./README.md#source) into your GOPATH
2. Verify that existing tests pass:
`make test-all`
3. Create a topic branch:
`git checkout -b feature`
4. **Make your changes.**
(It helps a lot if you write tests first.)
5. Verify that the tests still pass.
6. Fork the project on GitHub:
`make && bin/hub fork --remote-name=origin`
7. Push to your fork:
`git push -u origin HEAD`
8. Open a pull request describing your changes:
`bin/hub pull-request`
Vendored Go dependencies are managed with [`dep`](https://golang.github.io/dep/docs/daily-dep.html).
Check `dep help ensure` for information on how to add or update a vendored
dependency.
## How to write tests
The new test suite is written in Cucumber under `features/` directory. Each
scenario is actually making real invocations to `hub` on the command-line in the
context of a real (dynamically created) git repository.
Whenever a scenario requires talking to the GitHub API, a fake HTTP server is
spun locally to replace the real GitHub API. This is done so that the test suite
runs faster and is available offline as well. The fake API server is defined
as a Sinatra app inline in each scenario:
```
Given the GitHub API server:
"""
post('/repos/github/hub/pulls') {
status 200
}
"""
```
The best way to learn to write new tests is to study the existing scenarios for
commands that are similar to those that you want to add or change.
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