Handy Heroku credentials switcher.

gistfile1.rb

#!/usr/bin/env ruby -wKU

# I use 2 different Heroku accounts, one for my own apps and one for Amani's.
# This script givens me a reasonable way to switch between them, with a little
# less typing than moving a symlink around. And I get to use abbrev!
require 'abbrev'
require 'pathname'
require 'yaml'

credentials = Pathname.new(ENV['HOME']).join('.heroku', 'credentials')
config      = YAML.load(DATA)

current_user    = credentials.readlines.first.chomp
available_users = config.keys - [current_user]
selected_user   = available_users.abbrev[ARGV.shift]

if password = config[selected_user]
  puts "Re-authenticating as #{selected_user}."
  credentials.open('w') do |file|
    file.puts(selected_user)
    file.puts(password)
  end
else
  puts "You are #{current_user}."
end

__END__
matthew.todd@gmail.com: ELIDED
developer@amanikids.org: ELIDED