[gnuoy,trivial] Pre-release charmhelper sync to pickup leadership election peer migration fix

hooks/charmhelpers/contrib/peerstorage/__init__.py

@@ -59,7 +59,7 @@ def some_hook():
 """
 
 
-def leader_get(attribute=None):
+def leader_get(attribute=None, rid=None):
     """Wrapper to ensure that settings are migrated from the peer relation.
 
     This is to support upgrading an environment that does not support
@@ -94,7 +94,8 @@ def leader_get(attribute=None):
         # If attribute not present in leader db, check if this unit has set
         # the attribute in the peer relation
         if not leader_settings:
-            peer_setting = relation_get(attribute=attribute, unit=local_unit())
+            peer_setting = _relation_get(attribute=attribute, unit=local_unit(),
+                                         rid=rid)
             if peer_setting:
                 leader_set(settings={attribute: peer_setting})
                 leader_settings = peer_setting
@@ -103,7 +104,7 @@ def leader_get(attribute=None):
             settings_migrated = True
             migrated.add(attribute)
     else:
-        r_settings = relation_get(unit=local_unit())
+        r_settings = _relation_get(unit=local_unit(), rid=rid)
         if r_settings:
             for key in set(r_settings.keys()).difference(migrated):
                 # Leader setting wins
@@ -151,7 +152,7 @@ def relation_get(attribute=None, unit=None, rid=None):
     """
     try:
         if rid in relation_ids('cluster'):
-            return leader_get(attribute)
+            return leader_get(attribute, rid)
         else:
             raise NotImplementedError
     except NotImplementedError:

hooks/charmhelpers/core/hookenv.py

@@ -34,7 +34,22 @@ import errno
 import tempfile
 from subprocess import CalledProcessError
 
-from charmhelpers.cli import cmdline
+try:
+    from charmhelpers.cli import cmdline
+except ImportError as e:
+    # due to the anti-pattern of partially synching charmhelpers directly
+    # into charms, it's possible that charmhelpers.cli is not available;
+    # if that's the case, they don't really care about using the cli anyway,
+    # so mock it out
+    if str(e) == 'No module named cli':
+        class cmdline(object):
+            @classmethod
+            def subcommand(cls, *args, **kwargs):
+                def _wrap(func):
+                    return func
+                return _wrap
+    else:
+        raise
 
 import six
 if not six.PY3: