developers.home-assistant/docs/development_environment.md

title
Set up Development Environment

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
$ 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

Due to 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-dev python3-venv
$ 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 OS X

Install Homebrew, then use that to install Python 3:

$ brew install python3 autoconf

Then install ffmpeg:

$ brew install ffmpeg

Setup Local Repository

Visit the Home Assistant repository and click Fork. Once forked, setup your local copy of the source using the commands:

$ 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 -m venv venv
$ source venv/bin/activate

Install the requirements with a provided script named setup.

$ script/setup

Invoke your installation, adjusting the configuration if required.

$ hass

Logging

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