show commands that are being run

shellshower.py

from clint.textui import puts, indent, colored

def red(msg):
  return puts(colored.red(msg))


def shell(cmd, fail_silently=False, *args, **kwargs):
  # tell the user what's about to go out
  puts(colored.blue("-> {}".format(cmd)))

  try:
    out = subprocess.check_output(cmd, shell=True, *args, **kwargs)
  except subprocess.CalledProcessError as e:
    red("Command failed! (exit code {})".format(e.returncode))
    with indent(4):
      red("Failed cmd: {}".format(e.cmd))
      red("Exit code: {}".format(e.returncode))
      red("Output:")

    out = e.output
    if not fail_silently:
      raise e

  finally:
    with indent(4):
      puts(out)

  return out