Merge ~kos.tsakalozos/charm-graylog:master into ~graylog-charmers/charm-graylog:master

[Konstantinos Tsakalozos]

Use charm-env to have access to venv in actions

The base layer changed recently its default behaviour that had to do with venvs [1]. By default venv [2] is now set to true.

As a result the charm actions now need to use the charms venv to have access to for example charmhelpers.

Without this patch actions fail with:

'''
2018-03-16 11:19:34 DEBUG show-admin-password Traceback (most recent call last):
2018-03-16 11:19:34 DEBUG show-admin-password File "/var/lib/juju/agents/unit-g2-0/charm/actions/show-admin-password", line 16, in <module>
2018-03-16 11:19:34 DEBUG show-admin-password from charms import reactive # noqa E402
2018-03-16 11:19:34 DEBUG show-admin-password ImportError: cannot import name 'reactive'
'''

[1] https://github.com/juju-solutions/layer-basic/commit/ce824a7af99134a9cd2a1bca98b3b85983d60e56
[2] https://charmsreactive.readthedocs.io/en/latest/layer-basic.html#layer-configuration

[Stuart Bishop (stub)]

Yes, this is the preferred solution.

review: Approve

[🤖 Canonical IS Merge Bot (canonical-is-mergebot)]

This merge proposal is being monitored by mergebot. Change the status to Approved to merge.

[🤖 Canonical IS Merge Bot (canonical-is-mergebot)]

Change successfully merged at revision 55adc8c0826dc05c6ff6f85f34f63c952d8c48b2

diff --git a/actions/actions.py b/actions/actions.py
index 81d817c..eed1233 100755
--- a/actions/actions.py
+++ b/actions/actions.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python3
+#!/usr/local/sbin/charm-env python3
 
 import os
 import sys