run.py 文件源码

def find_gae_path():
  global GAE_PATH
  if GAE_PATH:
    return GAE_PATH
  if IS_WINDOWS:
    gae_path = None
    for path in os.environ['PATH'].split(os.pathsep):
      if os.path.isfile(os.path.join(path, 'dev_appserver.py')):
        gae_path = path
  else:
    gae_path = spawn.find_executable('dev_appserver.py')
    if gae_path:
      gae_path = os.path.dirname(os.path.realpath(gae_path))
  if not gae_path:
    return ''
  gcloud_exec = 'gcloud.cmd' if IS_WINDOWS else 'gcloud'
  if not os.path.isfile(os.path.join(gae_path, gcloud_exec)):
    GAE_PATH = gae_path
  else:
    gae_path = os.path.join(gae_path, '..', 'platform', 'google_appengine')
    if os.path.exists(gae_path):
      GAE_PATH = os.path.realpath(gae_path)
  return GAE_PATH