gvaughn

# This module represents a behaviour and when used picks from the Application configuration which implementation will be used

defmodule Clock do
  @callback now() :: Integer.t

  defmacro __using__([]) do
    module = Application.get_env(:my_app, :Clock)
    quote do
      alias unquote(module), as: Clock
    end

gvaughn

gvaughn

Greg Vaughn posted this cool alias the other day:

copr = "!f() { git fetch -fu origin refs/pull/$1/head:pr-$1; git checkout pr-$1; } ; f"

Preferring to be a stock-tools person, I wanted to deconstruct this to see how I'd use it off-the-shelf without the alias.

git fetch     -- I'm already familiar with this command
-fu           -- these two flags I'm not sure are necessary, esp. -u since the help says, 
 "unless you are implementing your own Porcelain you are not supposed to use 

gvaughn

Step 0:

Get Homebrew installed on your mac if you don't already have it

Step 1:

Install highlight. "brew install highlight". (This brings down Lua and Boost as well)

Step 2: