Thibaut Barrère thbar

Elixir Language Server Implementation Comparison

We'll be comparing the following:

Disclaimers:

Vagrant and VMWare Tech Preview 21H1 on Apple M1 Pro

UPDATE November 20, 2022: VMWare Fusion 13

VMWare Fusion 13 is now released. Read Vagrant and VMWare Fusion 13 Player on Apple M1 Pro for the latest.

Summary

This document summarizes notes taken while to make the VMWare Tech preview work on Apple M1 Pro, it originated

Using Elixir releases and multi-stage Docker files to simplify Phoenix deployment

This repo is my experiment in deploying a basic Phoenix app using the release feature from elixir 1.9 (https://elixir-lang.org/blog/2019/06/24/elixir-v1-9-0-released/) and docker, via a multi-stage Dockerfile (https://docs.docker.com/develop/develop-images/multistage-build/) leveraging bitwalker's docker images for Elixir and Phoenix.

Step 1: Install Elixir 1.9.1 (and Erlang)

The simplest way to manage Elixir versions is to use asdf.

Recently, Let's Encrypt launched free wildcard certificates. While this is good news in and of itself, as it removes one of the last remaining reasons for expensive commercial certificates, I've unfortunately seen a lot of people dangerously misunderstand what wildcard certificates are for.

Therefore, in this brief post I'll explain why you probably shouldn't use a wildcard certificate, as it will put your security at risk.

A brief explainer

It's generally pretty poorly understood (and documented!) how TLS ("SSL") works, so let's go through a brief explanation of the parts that are important here.

The general (simplified) idea behind how real-world TLS deployments work, is that you:

	Application.put_env(:elixir, :ansi_enabled, true)

	# IEx shell customization for color
	# - Added as a comment: https://thinkingelixir.com/course/code-flow/module-1/pipe-operator/
	# - Original source: https://samuelmullen.com/articles/customizing_elixirs_iex/
	# - Can add to a specific project or can put in the User home folder as a global config.
	# Updates from:
	# - https://github.com/am-kantox/finitomata/blob/48e1b41b21f878e9720e6562ca34f1ce7238d810/examples/ecto_intergation/.iex.exs
	timestamp = fn ->
	{_date, {hour, minute, _second}} = :calendar.local_time

	defmodule CertChecker do
	alias X509.Certificate, as: Cert

	def check_file(file) do
	[cert \| chain] = read_pem_file(file)
	check_certs(cert, chain)
	end

	def check_certs(cert, chain) do
	cert_map = chain \|> map_by_subject()

	use actix::prelude::*;

	/// Define message
	#[derive(Message)]
	#[rtype(result = "Result<String, std::io::Error>")]
	struct WhatsYourName;

	#[derive(Message)]
	#[rtype(result = "()")]
	struct SetYourName {

	require 'aws-sdk'
	require 'active_support'
	require 'active_support/core_ext'

	# http://docs.aws.amazon.com/sdkforruby/api/Aws/S3/Object.html#copy_to-instance_method
	COPY_TO_OPTIONS = [:multipart_copy, :content_length, :copy_source_client, :copy_source_region, :acl, :cache_control, :content_disposition, :content_encoding, :content_language, :content_type, :copy_source_if_match, :copy_source_if_modified_since, :copy_source_if_none_match, :copy_source_if_unmodified_since, :expires, :grant_full_control, :grant_read, :grant_read_acp, :grant_write_acp, :metadata, :metadata_directive, :tagging_directive, :server_side_encryption, :storage_class, :website_redirect_location, :sse_customer_algorithm, :sse_customer_key, :sse_customer_key_md5, :ssekms_key_id, :copy_source_sse_customer_algorithm, :copy_source_sse_customer_key, :copy_source_sse_customer_key_md5, :request_payer, :tagging, :use_accelerate_endpoint]

	Aws.config.update({
	region: 'us-east-1',
	credentials: Aws::Credentials.new(AWS_ACCESS_KEY, AWS_SECRET_KEY)

	child_pid = spawn "psrecord #{Process.pid} --plot plot_#{Time.now.strftime('%H_%M_%S')}.png"

	a = []
	10_000_000.times { \|i\| a << i.to_s }

	puts Process.kill('SIGINT', child_pid)
	puts "continue scripting"