Summer update 😎

.devcontainer/Dockerfile

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+FROM python:3.7
+
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends \
+        git \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN python -m pip install --upgrade colorlog black
+RUN python -m pip install --upgrade git+git://github.com/home-assistant/home-assistant.git@dev
+RUN cd && mkdir -p /config/custom_components
+
+
+WORKDIR /workspace
+
+# Set the default shell to bash instead of sh
+ENV SHELL /bin/bash

.devcontainer/README.md

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+# Devcontainer
+
+_The easiest way to contribute to and/or test this repository._
+
+## Requirements
+
+- [git](https://git-scm.com/book/en/v2/Getting-Started-Installing-Git)
+- [docker](https://docs.docker.com/install/)
+- [VS Code](https://code.visualstudio.com/)
+- [Remote - Containers (VSC Extention)](https://marketplace.visualstudio.com/items?itemName=ms-vscode-remote.remote-containers)
+
+[More info about requirements and devcontainer in general](https://code.visualstudio.com/docs/remote/containers#_getting-started)
+
+## How to use Devcontainer for development/test
+
+1. Make sure your computer meets the requirements.
+1. Fork this repository.
+1. Clone the repository to your computer.
+1. Open the repository using VS Code.
+
+When you open this repository with VSCode and your computer meets the requirements you are asked to "Reopen in Container", do that.
+
+![reopen](images/reopen.png)
+
+If you don't see this notification, open the command pallet (ctrl+shift+p) and select `Remote-Containers: Reopen Folder in Container`.
+
+_It will now build the devcontainer._
+
+The container have some "tasks" to help you testing your changes.
+
+## Custom Tasks in this repository
+
+_Start "tasks" by opening the the command pallet (ctrl+shift+p) and select `Tasks: Run Task`_
+
+Running tasks like `Start Home Assistant on port 8124` can be restarted by opening the the command pallet (ctrl+shift+p) and select `Tasks: Restart Running Task`, then select the task you want to restart.
+
+### Start Home Assistant on port 8124
+
+This will copy the configuration and the integration files to the expected location in the container.
+
+And start up Home Assistant on [port 8124.](http://localhost:8124)
+
+### Upgrade Home Assistant to latest dev
+
+This will upgrade Home Assistant to the latest dev version.
+
+### Set Home Assistant Version
+
+This allows you to specify a version of Home Assistant to install inside the devcontainer.
+
+### Home Assistant Config Check
+
+This runs a config check to make sure your config is valid.

.devcontainer/configuration.yaml

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+default_config:
+logger:
+  default: error
+  logs:
+    custom_components.blueprint: debug
+
+
+
+blueprint:
+  username: my_username
+  password: my_password
+  binary_sensor:
+    - enabled: true
+      name: My custom name
+  sensor:
+    - enabled: true
+      name: My custom name
+  switch:
+    - enabled: true
+      name: My custom name

.devcontainer/custom_component_helper

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+#!/usr/bin/env bash
+
+function StartHomeAssistant {
+  echo "Copy configuration.yaml"
+  cp -f .devcontainer/configuration.yaml /config || echo ".devcontainer/configuration.yaml are missing!" exit 1
+
+  echo "Copy the custom component"
+  rm -R /config/custom_components/ || echo ""
+  cp -r custom_components /config/custom_components/ || echo "Could not copy the custom_component" exit 1
+
+  echo "Start Home Assistant"
+  hass -c /config
+}
+
+function UpdgradeHomeAssistantDev {
+  python -m pip install --upgrade git+git://github.com/home-assistant/home-assistant.git@dev
+}
+
+function SetHomeAssistantVersion {
+  read -p 'Version: ' version
+  python -m pip install --upgrade homeassistant==$version
+}
+
+function HomeAssistantConfigCheck {
+  hass -c /config --script check_config
+}

.devcontainer/devcontainer.json

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+// See https://aka.ms/vscode-remote/devcontainer.json for format details.
+{
+	"context": "..",
+	"dockerFile": "Dockerfile",
+	"appPort": "8124:8123",
+	"runArgs": [
+		"-e",
+		"GIT_EDTIOR='code --wait'"
+	],
+	"extensions": [
+		"ms-python.python"
+	],
+	"settings": {
+		"python.pythonPath": "/usr/local/bin/python",
+		"python.linting.pylintEnabled": true,
+		"python.linting.enabled": true,
+		"python.formatting.provider": "black",
+		"editor.formatOnPaste": false,
+		"editor.formatOnSave": true,
+		"editor.formatOnType": true,
+		"files.trimTrailingWhitespace": true
+	}
+}