watchr script for running python 3 koans

python_koans_watchr.rb

# watchr script for running python 3 koans:
# https://github.com/gregmalcolm/python_koans

# put this in <python_koans_home>/python_koans_watchr.rb
# cd python_3
# watchr ../python_koans_watchr.rb

ENV["WATCHR"] = "1"
system 'clear'

def run(cmd)
  puts(cmd)
  `#{cmd}`
end

def run_koans
  system('clear')
  system('./run.sh')
end

watch('koans/.*\.py') { run_koans }

# Ctrl-\
Signal.trap 'QUIT' do
  puts " --- Running koans ---\n\n"
  run_koans
end

@interrupted = false

# Ctrl-C
Signal.trap 'INT' do
  if @interrupted then
    @wants_to_quit = true
    abort("\n")
  else
    puts "Interrupt a second time to quit"
    @interrupted = true
    Kernel.sleep 1.5
  end
end