A very simple shell for the heroku CLI that allows you to avoid typing `heroku` and `--app app_name` all the time

heroku-shell

#!/usr/bin/env ruby

require "readline"
APP_NAME = ARGV[0]

unless APP_NAME
  STDERR.puts "Usage: #{$0} HEROKU_APP_NAME"
  exit 1
end

def bold(string)
  "\e[0;1m#{string}\e[m"
end

Readline::HISTORY.push 'foobar'
while line = Readline.readline("heroku --app #{bold APP_NAME} > ", true)
  exit 0 if line.include? 'exit' or line.include? 'quit'

  if line.strip.length > 0
    command = "heroku #{line.strip} --app #{APP_NAME}"
    puts "$ #{bold command}"
    begin
      system command
    rescue Interrupt
      sleep 0.5
    end
  else
    puts "/join #noop"
  end
end