Sander sajoku

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've always had fzf and ripgrep on my radar, and I've finally gotten around to using them together. Good lord it makes a world of difference, especially when added to Vim as well as Bash.

Add the following snippet to your ~/.bashrc, this add's fzf keybindings to bash and gets fzf to use ripgrep by default for faster searching.

[ -f ~/.fzf.bash ] && source ~/.fzf.bash
export FZF_DEFAULT_COMMAND='rg --files --no-ignore --hidden --follow --glob "!.git/*"'
bind -x '"\C-p": vim $(fzf);'

Okay now what can you do?

Installing Python 3.5 on Debian Jessie with `pyenv`

Debian Jessie does not come with the correct Python version out of the box, and instead comes with Python 2. To be able to install Python 3(.5), we have a few options. We could build and install from source, but as per Debian's website, we shouldn't do this. Instead, we will use pyenv, a tool that allows users to switch Python versions easily without breaking their system.

Installing `pyenv`

To install pyenv, we will use the official installer.

curl -L https://raw.githubusercontent.com/yyuu/pyenv-installer/master/bin/pyenv-installer | bash

	#!/usr/bin/env ruby

	require 'bundler/inline'

	gemfile do
	source 'https://rubygems.org'
	gem 'premailer'
	gem 'nokogiri'
	gem 'base64'
	gem 'mail'

	Copyright 2023 Carl Mercier

	Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

	The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

	THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHE

	After automatically updating Postgres to 10.0 via Homebrew, the pg_ctl start command didn't work.
	The error was "The data directory was initialized by PostgreSQL version 9.6, which is not compatible with this version 10.0."

	Database files have to be updated before starting the server, here are the steps that had to be followed:

	# need to have both 9.6.x and latest 10.0 installed, and keep 10.0 as default
	brew unlink postgresql
	brew install [email protected]
	brew unlink [email protected]
	brew link postgresql

	# File: app/controllers/api/api_controller.rb
	class Api::ApiController < ActionController::Base
	# Consider subclassing ActionController::API instead of Base, see
	# http://api.rubyonrails.org/classes/ActionController/API.html

	protect_from_forgery with: :null_session
	before_action :authenticate

	def self.disable_turbolinks_cookies
	skip_before_action :set_request_method_cookie

	<div class="canvas-con">
	<div class="canvas-con-inner">
	<canvas id="mychart" height="250px"></canvas>
	</div>
	<div id="my-legend-con" class="legend-con"></div>
	</div>

	#!/bin/bash

	set -euo pipefail

	xcrun altool --upload-app --type ios --file "path/to/foo.ipa" --username "$ITC_USER" --password "$ITC_PASSWORD"

	##
	# Helpers for randomized person testing.
	module PersonsHelper
	##
	# Generate the next n elements for the array, but in a predefined manner.
	class FakeElementGenerator
	##
	# Generate elements, the first of which must be start_with.
	def initialize(start_with:)
	@start = start_with

Sander sajoku

Docker for Mac

Pulling and running with Docker

Installing Python 3.5 on Debian Jessie with pyenv

Installing pyenv

Installing Python 3.5 on Debian Jessie with `pyenv`

Installing `pyenv`