tests/charms/layers/simple/reactive/simple.py

   1 # Copyright 2019 Canonical Ltd.
   2 #
   3 # Licensed under the Apache License, Version 2.0 (the "License");
   4 # you may not use this file except in compliance with the License.
   5 # You may obtain a copy of the License at
   6 #
   7 #     http://www.apache.org/licenses/LICENSE-2.0
   8 #
   9 #     Unless required by applicable law or agreed to in writing, software
  10 #     distributed under the License is distributed on an "AS IS" BASIS,
  11 #     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 #     See the License for the specific language governing permissions and
  13 #     limitations under the License.
  14
  15 from charmhelpers.core.hookenv import (
  16     action_get,
  17     action_fail,
  18     action_set,
  19     status_set,
  20 )
  21 from charms.reactive import (
  22     clear_flag,
  23     set_flag,
  24     when,
  25     when_not,
  26 )
  27 import charms.sshproxy
  28 import os
  29
  30
  31 @when('sshproxy.configured')
  32 @when_not('simple.installed')
  33 def install_simple_proxy_charm():
  34     """Post-install actions.
  35
  36     This function will run when two conditions are met:
  37     1. The 'sshproxy.configured' state is set
  38     2. The 'simple.installed' state is not set
  39
  40     This ensures that the workload status is set to active only when the SSH
  41     proxy is properly configured.
  42     """
  43     set_flag('simple.installed')
  44     status_set('active', 'Ready!')
  45
  46
  47 @when('actions.touch')
  48 def touch():
  49     if not in_action_context():
  50         clear_flag('actions.touch')
  51         return
  52
  53     err = ''
  54     try:
  55         filename = action_get('filename')
  56         cmd = ['touch {}'.format(filename)]
  57         result, err = charms.sshproxy._run(cmd)
  58     except Exception:
  59         action_fail('command failed:' + err)
  60     else:
  61         action_set({'output': result})
  62     finally:
  63         clear_flag('actions.touch')
  64
  65
  66 def in_action_context():
  67     """Determine whether we're running on an action context."""
  68     return 'JUJU_ACTION_UUID' in os.environ