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Home Assistant Add-on Devcontainer Template

Summary

This is a templated to ease development of Home Assistant add-ons inside of a VS Code devcontainer.

Usage

Simply copy the contents of this repository to the base directory of the add-on you are developing. Modify the files in the directory as needed.

Your add-on will be appear in the Local Add-ons section of the Home Assistant "Add-on store" tab.

VS Code Tasks

The following tasks are included for your convenience.

  • Start Home Assistant

This task will download and run a Home Assistant environment inside the container using the latest dev targets of Home Assistant and Home Assistant Core. It will be mapped to port 8123 (by default) on the host machine.

  • Run Home Assistant CLI - Requires a running Home Assistant instance

This task will open a Home Assistant CLI window inside VS Code.

  • Cleanup stale Home Assistant environment

This task will nuke the data stored by Home Assistant (including the underlying Home Assistant Core). Can be used to revert to a pristine state before starting Home Assistant.

FAQ

Q: How do I customize some-widget-or-another?

A: There is almost no "black magic" going on here. Make sure to read up on how devcontainers work from the official website.

Q: I read the docs. I still need help customizing some-widget-or-another!

A: Come ask on Discord in channel #devs_addon or #devs_supervisor.

Q: How do I develop more than one add-on in the same Home Assistant instance?

A: See this issue.

Q: Why are there 2 Dockerfiles?

A: The .devcontainer\Dockerfile is for your development environment. The Dockerfile in the root directory is to build your add-on.

Q: I added .devcontainer to my .dockerignore and now things are broken.

A: Don't. The .dockerignore is shared by both Dockerfiles, and by adding .devcontainer to your .dockerignore, you will break things in the devcontainer. Instead, use other means to avoid copying .devcontainer (and .vscode for that matter) in your "production" Dockerfile.

Q: When installing my local add-on, I'm not seeing my latest changes. Instead, I see the functionality of the last published version of my add-on.

A: Make sure that you remove the image key from your config.json, else when "installing" the add-on, it will try to use the docker image, rather than building the add-on locally.

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