run commands on a single app context

gistfile1.txt

# heroku-cli --app my-heroku-app
[ my-heroku-app ] > 

heroku-cli.rb

#!/usr/bin/env ruby
require 'readline'

def prompt
  if ARGV.include?("--app")
    "[ #{ARGV[ARGV.index("--app") + 1]} ] > "
  else
    "> "
  end
end

stty_save = `stty -g`.chomp

trap('INT') { system('stty', stty_save); exit }

cmd_prefix = ARGV.join(" ")

while cmd = Readline.readline(prompt, true)
  exit if /exit/ =~ cmd
  if cmd != ""
    full_cmd = "heroku #{cmd} #{cmd_prefix}"
    puts " [executing #{full_cmd}]"
    system(full_cmd)
  end
end