Dalibor Karlović dkarlovi

Docker for Mac

On M1 machines, Docker for Mac is running a lightweight linux ARM VM, then running containers within that, so containers are essentially running natively. Don't be fooled by the fact the UI or binary CLI tools (e.g. docker) might require Rosetta.

Within that VM is an emulation layer called QEmu. This can be used by docker to run Intel containers. This does not use Rosetta at all, and has a roughly 5-6X performance penalty. (If you just upgraded your CPU this may result in a similar performance to your old machine!)

Pulling and running with Docker

Many images in public registries are multi-architecture. For instance at the time of writing on Docker Hub the php:8.0-cli image has the following digests:

I use PlantUML a lot. It's what I use for drawing all sorts of diagrams and it's handy because of its easy markup (once you get used to it) while making things easy to maintain as projects grow (thanks to version control)

This gist explains how I do my PlantUML workspace in a project.

The idea is to keep a globals directory for all diagrams to follow (like the "stylesheet" below) to keep things consistent.
I use a stylesheet.iuml file that keeps the use of colors consistent through use of basic FOREGROUND, BACKGROUND and ACCENT colors.
The style-presets.iuml file defines these colors so you can make "presets" or "themes" out of them.
As stated in the stylesheet.iuml, you'll need the Roboto Condensed and Inconsolata fonts for these to work properly.
You can choose to either run the PlantUML jar over your file/s, or use an IDE like VSCode with the PlantUML extension. Here's a preview of example-sequence.puml for example: https://imgur.com/Klk3w2F

public class Hello
{
   public static void Main()
   {
-      System.Console.WriteLine("Hello, World!");
+      System.Console.WriteLine("Rock all night long!");
   }
}

	<?php

	declare(strict_types=1);

	use PHPUnit\Framework\Assert;
	use PHPUnit\Framework\Constraint\Callback;
	use PHPUnit\Framework\Constraint\Constraint;

	/**
	* This is a replacement for InvocationMocker::withConsecutive() which is

	version: '3.7'

	volumes:
	appdata: ~
	code: ~

	services:
	php:
	volumes:
	- code:/var/www/html

	jobs:
	strategy:
	fail-fast: false
	matrix:
	chunk_count: [5]
	chunk_number: [1, 2, 3, 4, 5]

	env:
	CHUNK_COUNT: ${{matrix.chunk_count}}
	CHUNK_NUMBER: ${{matrix.chunk_number}}

	<?php

	declare(strict_types=1);

	namespace App\Doctrine\EventListener;

	use Doctrine\DBAL\Schema\PostgreSQLSchemaManager;
	use Doctrine\ORM\Tools\Event\GenerateSchemaEventArgs;

	final class FixPostgreSQLDefaultSchemaListener

	<?php

	$query = <<<'GRAPHQL'
	query GetUser($user: String!) {
	user (login: $user) {
	name
	email
	repositoriesContributedTo {
	totalCount
	}

	<?php declare(strict_types=1);

	if (
	extension_loaded( 'xdebug' )
	&& version_compare( '2.6.0', phpversion( 'xdebug' ), '<=' )
	)
	{
	/** @noinspection PhpUndefinedFunctionInspection */
	/** @noinspection PhpUndefinedConstantInspection */
	xdebug_set_filter(

	<?php

	namespace Zalas\Infrastructure\Scraper;

	use OldSound\RabbitMqBundle\RabbitMq\Consumer;
	use OldSound\RabbitMqBundle\RabbitMq\ConsumerInterface;
	use OldSound\RabbitMqBundle\RabbitMq\ProducerInterface;
	use PhpAmqpLib\Connection\AbstractConnection;
	use PhpAmqpLib\Connection\AMQPLazyConnection;
	use PhpAmqpLib\Exception\AMQPTimeoutException;