home-assistant.io/source/developers/development_environment.markdown
Andrey 158f7b333f Add missing binary dependencies. (#2413)
* Add missing binary dependencies.

* Update development_environment.markdown
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---
layout: page
title: "Set up Development Environment"
description: "Set up your environment to start developing for Home Assistant."
date: 2014-12-21 13:32
sidebar: true
comments: false
sharing: true
footer: true
---
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.
### {% linkable_title Setup Local Repository %}
Visit the [Home Assistant repository](https://github.com/home-assistant/home-assistant) and click **Fork**.
Once forked, setup your local copy of the source using the commands:
```bash
$ 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
```
### {% linkable_title Prepare Your Environment %}
#### {% linkable_title Core dependencies %}
Install the core dependencies.
```bash
$ sudo apt-get install python3-pip python3-dev
```
#### {% linkable_title Platform dependencies %}
In order to run `script/setup` below you will need some more dependencies.
```bash
$ sudo apt-get install libssl-dev libxml2-dev libxslt1-dev libjpeg-dev libffi-dev
```
<p class='note'>
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 python34 python34-devel mysql-devel`
</p>
Additional dependencies exist if you you plan to perform Frontend Development, please read the [Frontend](https://home-assistant.io/developers/frontend/) section to learn more.
#### {% linkable_title Setting up virtual environment (optional) %}
If you plan on providing isolation to your environment using [`venv`](https://docs.python.org/3.4/library/venv.html). Within the `home-assistant` directory, create and activate your virtual environment.
```bash
$ python3 -m venv venv
$ source venv/bin/activate
```
Note, Debian does not ship a full Python3 package and so requires you to install `venv` manually `sudo apt-get install python3-venv`.
### {% linkable_title Setup and Run %}
* On Mac OS X and Linux:
```bash
$ cd home-assistant
$ script/setup
```
* On Windows, you can use `python setup.py develop` instead of the setup script.
* Run `hass` to invoke your local installation.
### {% linkable_title 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](/components/logger/) component to adjust
logging to DEBUG to see even more details about what is going on.
### {% linkable_title Developing on Windows %}
If you are using Windows as a development platform, make sure that you have the correct Microsoft Visual C++ build tools installed. Check the [Windows Compilers](https://wiki.python.org/moin/WindowsCompilers) section on the [Python website](https://www.python.org/) for details. Validation using `tox` will fail if this is not done correctly.
Also, make sure to install or upgrade the `setuptools` Python package. It contains compatibility improvements and adds automatic use of compilers:
```bash
$ pip install --upgrade setuptools
```