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Home Assistant Lovelace Migrator

Do you want to try out this experimental (!) new lovelace UI stuff in Home Assistant but don't want to migrate your entire configuration? This script is here to help! It reads in your Home Assistant configuration (specifically the group: section) and creates a matching ui-lovelace.yaml file in your Home Assistant configuration folder (of course backing up any previous file at that path).

To use this script, you first need to have python and home assistant installed where you plan to run this script. Do so using virtual environments and the pip3 install -U homeassistant command. Then copy below file to lovelace_migrate.py (any location should work) and run:

python3 lovelace_migrate.py -c <PATH_TO_HASS_CONFIG_DIR>

libdispatch efficiency tips

The libdispatch is one of the most misused API due to the way it was presented to us when it was introduced and for many years after that, and due to the confusing documentation and API. This page is a compilation of important things to know if you're going to use this library. Many references are available at the end of this document pointing to comments from Apple's very own libdispatch maintainer (Pierre Habouzit).

My take-aways are:

You should create very few, long-lived, well-defined queues. These queues should be seen as execution contexts in your program (gui, background work, ...) that benefit from executing in parallel. An important thing to note is that if these queues are all active at once, you will get as many threads running. In most apps, you probably do not need to create more than 3 or 4 queues.
Go serial first, and as you find performance bottle necks, measure why, and if concurrency helps, apply with care, always validating under system pressure. Reuse

	// Copyright © 2019 Simon Strandgaard. All rights reserved.
	import SwiftyBeaver

	public let log = SwiftyBeaver.self

	extension BaseDestination.LevelColor {
	mutating func applyDefaultStyle() {
	debug = "🏐 "
	info = "🏐 "
	verbose = "🏐 "

	import Foundation
	import UIKit

	struct ViewStyle<T> {
	let style: (T) -> Void
	}

	let filled = ViewStyle<UIButton> {
	$0.setTitleColor(.white, for: .normal)
	$0.backgroundColor = .red


	extension UICollectionViewFlowLayout {

	typealias DelegateMethod<Key, Value> = ((UICollectionView, UICollectionViewLayout, Key) -> Value)

	private var delegate: UICollectionViewDelegateFlowLayout? {
	return collectionView?.delegate as? UICollectionViewDelegateFlowLayout
	}

	func retrieve<Key, Value>(

	//
	// UIAccessorizedTextField.swift
	// AccessorizedTextField
	//
	// Created by Damien Laughton on 28/03/2018.
	// 2018 Mobilology Limited. No rights reserved.
	//

	import Foundation
	import UIKit

	#!/bin/bash

	set -e

	CONTENTS=$(tesseract -c language_model_penalty_non_dict_word=0.8 --tessdata-dir /usr/local/share/tessdata/ "$1" stdout -l eng \| xml esc)

	hex=$((cat <<EOF
	<?xml version="1.0" encoding="UTF-8"?>
	<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
	<plist version="1.0">

	// Douglas Hill, February 2018

	import Foundation

	/// Returns a localised string with the key as an enum case so the compiler checks it exists.
	/// The enum should be automatically generated using UpdateLocalisedStringKeys.swift.
	public func localisedString(_ key: LocalisedStringKey) -> String {
	return Bundle.main.localizedString(forKey: key.rawValue, value: nil, table: nil)
	}

	extension UITabBarController {

	/**
	Show or hide the tab bar.

	- Parameter hidden: `true` if the bar should be hidden.
	- Parameter animated: `true` if the action should be animated.
	- Parameter transitionCoordinator: An optional `UIViewControllerTransitionCoordinator` to perform the animation
	along side with. For example during a push on a `UINavigationController`.
	*/

	// From Jared Sinclair's blog: http://blog.jaredsinclair.com/post/152672541355/how-i-organize-a-swift-file

	import UIKit
	import CoreData

	class DetailViewController: UIViewController {

	// MARK: Internal Properties

	weak var delegate: DetailViewControllerDelegate?