You'll need to set up a development environment if you want to develop a new feature or component for Home Assistant. Read on to learn how to set up.
Preparing your environment
Developing on Linux
Install the core dependencies.
sudo apt-get install python3-pip python3-dev python3-venv
In order to run
script/setup below you will need some more dependencies.
sudo apt-get install autoconf libssl-dev libxml2-dev libxslt1-dev libjpeg-dev libffi-dev libudev-dev zlib1g-dev pkg-config sudo apt-get install -y libavformat-dev libavcodec-dev libavdevice-dev libavutil-dev libswscale-dev libavresample-dev libavfilter-dev
Different distributions have different package installation mechanisms and sometimes packages names as well. For example CentOS would use:
sudo yum install epel-release && sudo yum install python36 python36-devel mysql-devel gcc
Additional dependencies exist if you plan to perform Frontend Development, please read the Frontend section to learn more.
Developing on Windows
Since Home Assistant is mainly designed and developed on Linux distributions, on Windows 10 you can setup a Linux subsystem.
Open Powershell as an Administrator and run
Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Windows-Subsystem-Linux
From Windows Store install Ubuntu.
When the Linux subsystem is set up, perform install as for Linux.
sudo apt-get update sudo apt-get install python3-pip python3.7-dev python3.7-venv python-wheel-common sudo apt-get install autoconf libssl-dev libxml2-dev libxslt1-dev libjpeg-dev libffi-dev libudev-dev zlib1g-dev sudo apt-get install -y libavformat-dev libavcodec-dev libavdevice-dev libavutil-dev libswscale-dev libavresample-dev libavfilter-dev
Hint: Git is included in Linux subsytem.
When invoking your installation (see below), make sure to specify a folder for configuration which is accessible from Windows.
mkdir -p ../config hass -c ../config
Developing on macOS
Install Homebrew, then use that to install Python 3:
brew install python3 autoconf
Then install ffmpeg:
brew install ffmpeg
Developing with devcontainer
The devcontainer is a preconfigured development environment with all the tools you need.
- Fork the repository.
- Clone the repository to your computer.
- Open the repository using Visual Studio code.
When you open this repository with Visual Studio code you are asked to "Reopen in Container", this will start the build of the container.
If you don't see this notification, open the command pallet and select
Remote-Containers: Reopen Folder in Container.
If you get
command 'remote-containers.reopenInContainer' not found make sure to use a Visual Studio code version with remote container support enabled.
The devcontainter comes with some useful tasks to help you with development, you can start these tasks by opening the command pallet and select
Tasks: Run Task then select the task you want to run.
Running tasks like
Preview can be restarted by opening the command pallet and selecting
Tasks: Restart Running Task, then select the task you want to restart.
Setup Local Repository
Visit the Home Assistant repository and click Fork. Once forked, setup your local copy of the source using the commands:
Windows users should be sure to clone to a path that inside the WSL (ex: ~/).
git clone https://github.com/YOUR_GIT_USERNAME/home-assistant.git cd home-assistant git remote add upstream https://github.com/home-assistant/home-assistant.git
Setting up virtual environment
To isolate your environment from the rest of the system, set up a
venv. Within the
home-assistant directory, create and activate your virtual environment.
python3.7 -m venv venv source venv/bin/activate
Install the requirements with a provided script named
Invoke your installation, adjusting the configuration if required.
By default logging in Home Assistant is tuned for operating in production (set to INFO by default, with some modules set to even less verbose logging levels).
You can use the logger component to adjust logging to DEBUG to see even more details about what is going on:
logger: default: info logs: homeassistant.core: debug nest.nest: debug asyncio: debug homeassistant.components.cloud.iot: debug