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Elixir Supervision Trees Made Easy

I started with Elixir just a couple weeks after the switch from 1.4 to 1.5, so the bulk of online resources were out of date (or at least resulted in deprecation warnings). This guide is for defining Elixir 1.5 supervised modules.

It's not actually terribly complicated. It's just sometimes unclear from examples what's implemented by the language and what you actually have to implement yourself.

Say we want a supervision tree like this (where each atom is a process):

:a

/ \

These comments are based on a few years of experience working with WSL. It's based on this tutorial:

https://blog.ropnop.com/configuring-a-pretty-and-usable-terminal-emulator-for-wsl/

And are basically updates to make it more relevant.

Opening a shell

In the past, to make the WSL run a command from cmd or somewhere else, you had to run the bash.exe program from windows, which fired up bash (and always bash) in the WSL and made it execute a command.

	---
	- hosts: localhost
	connection: local
	gather_facts: true

	tasks:
	- name: Add APT repositories
	when: ansible_os_family == 'Debian'
	become: true
	block:

	" Open Netrw on the directory of the current file
	nnoremap <leader>dd :Lexplore %:p:h<CR>

	" Toggle the Netrw window
	nnoremap <Leader>da :Lexplore<CR>

	if &columns < 90
	" If the screen is small, occupy half
	let g:netrw_winsize = 50
	else


	# https://gist.github.com/abn/a16e9d799312fb492861
	RUN printf '%s\n' \
	'#!/bin/bash' \
	'' \
	'set -xe' \
	'' \
	'INTERFACES="$(ip -o link \| sed -ne "s/[[:digit:]]: \\(eth[[:digit:]]\\)[^$]*/\\1/p")"' \
	'' \
	'echo "${INTERFACES}"' \

	#!/bin/bash

	# https://www.reddit.com/r/neovim/comments/ldetyp/linux_script_to_install_neovim_nightly_with_a/

	# Install Neovim Nightly on Linux and setup in as minimal way as possible to be like Visual Studio Code with TypeScript/Bash LSP support
	# On first run it will give an error as the plugins are not installed yet, type :PlugInstall and then restart
	# Typescript LSP needs a tsconfig.json in the project root directory to run, so use tsc --init

	# Install Neovim

	# Basic commands

	:Git [args] # does what you'd expect

	all of your `~/.gitconfig` aliases are available.

	:Git! [args] # same as before, dumping output to a tmp file

	Moving inside a repo.