Setup Development


Home Assistant is built from the ground up to be easily-extensible by other developers using components. It uses Python 3 for the backend and Polymer (Web components) for the frontend.

Home Assistant is open-source and MIT licensed. The source can be found here:

Starting development

You will need to set up a development environment if you want to start developing a new feature or component for Home Assistant. Please follow these steps to get setup.
Visit the the Home Assistant repository first and click fork in the top right.

We suggest that you setup a virtual environment aka venv before running the setup script.

$ git clone https://github.com/YOUR_GIT_USERNAME/home-assistant.git
$ cd home-assistant
$ git remote add upstream https://github.com/balloob/home-assistant.git
$ script/setup

Testing your work requires tox to be installed:

$ pip3 install tox

After following these steps, running hass will invoke your local installation.

Submitting improvements

Improvements to Home Assistant should be submitted one feature at a time using GitHub pull requests.

  1. From your fork, create a new branch to hold your changes
    git checkout -b some-feature
  2. Make the changes you want
  3. Test your changes and check for style violations
    tox
  4. Commit the changes
    git add .
    git commit -m "Added some-feature"
  5. Push your committed changes back to your fork on GitHub
    git push origin HEAD
  6. Follow these steps to create your pull request.

Further reading