Switches Keys for Multiple Heroku Accounts

hswitch.rb

#!/usr/bin/ruby
require 'fileutils'

account = ARGV.first

unless account
  puts "Usage: #{File.basename(__FILE__)} <account>"
  exit(1)
end

heroku_path = File.expand_path(File.join('~', '.heroku'))
account_path = File.join(heroku_path, 'accounts', account)
credentials_path = File.join(heroku_path)

if File.directory?(account_path)
  Dir[File.join(account_path, '*')].each do |file|
    puts "Copying #{file}"
    FileUtils.cp(file, credentials_path)
  end

  puts "Switched to #{account}."
else
  puts 'Invalid account.'
end