text: from __future__ import print_function, absolute_import
  import os
  import yaml
  import sys
  
  cert_auth_env_var = "CLIPPER_K8S_CERT_AUTH"
  client_cert_env_var = "CLIPPER_K8S_CLIENT_CERT"
  client_key_env_var = "CLIPPER_K8S_CLIENT_KEY"
  pw_env_var = "CLIPPER_K8S_PASSWORD"
  required_vars = [
      cert_auth_env_var, client_cert_env_var, client_key_env_var, pw_env_var
  ]
  
  
  def write_config(dest_path):
  
      for v in required_vars:
          if v not in os.environ:
              print("{} not defined. Cannot construct kube config".format(v))
              sys.exit(1)
  
      cert_auth_data = os.environ[cert_auth_env_var]
      client_cert_data = os.environ[client_cert_env_var]
      client_key_data = os.environ[client_key_env_var]
      pw_data = os.environ[pw_env_var]
  
      base_config = {
          'kind':
          'Config',
          'preferences': {},
          'current-context':
          'cluster.clipper-k8s-testing.com',
          'contexts': [{
              'name': 'cluster.clipper-k8s-testing.com',
              'context': {
                  'cluster': 'cluster.clipper-k8s-testing.com',
                  'user': 'cluster.clipper-k8s-testing.com'
              }
          }],
          'clusters': [{
              'cluster': {
                  'certificate-authority-data': cert_auth_data,
                  'server': 'https://api.cluster.clipper-k8s-testing.com'
              },
              'name': 'cluster.clipper-k8s-testing.com'
          }],
          'apiVersion':
          'v1',
          'users': [{
              'name': 'cluster.clipper-k8s-testing.com',
              'user': {
                  'username': 'admin',
                  'password': pw_data,
                  'client-key-data': client_key_data,
                  'client-certificate-data': client_cert_data
              }
          }, {
              'name': 'cluster.clipper-k8s-testing.com-basic-auth',
              'user': {
                  'username': 'admin',
                  'password': pw_data
              }
          }]
      }
      with open(dest_path, "w") as f:
          yaml.dump(base_config, f)
  
  
  if __name__ == '__main__':
      config_path = sys.argv[1]
      config_path = os.path.abspath(os.path.expanduser(config_path))
      print("Writing kube config to {}".format(config_path))
      write_config(config_path)
  