bitbake: tinfoil: fix override handling in remote datastores

There was a huge gap in the remote datastore code introduced in the
tinfoil2 rework - we weren't handling overrides at all, since these are
stored separately from the actual data in the DataSmart object. Thus,
when a datastore actually represents a remote datastore we need to go
back to that remote datastore to get the override data as well, so
introduce code to do that.

To avoid a second round-trip I had to modify the _findVar() function to
return the override data as well. This will increase the overhead a
little when that data is superfluous, but without making the function
even uglier I don't think there's a way to avoid that.

(Bitbake rev: 4f9d6f060ed247fb6fa2f45668a892a1788d3f91)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/command.py

@@ -457,16 +457,22 @@ class CommandsSync:
         dsindex = params[0]
         name = params[1]
         datastore = command.remotedatastores[dsindex]
-        value = datastore._findVar(name)
+        value, overridedata = datastore._findVar(name)
 
         if value:
             content = value.get('_content', None)
             if isinstance(content, bb.data_smart.DataSmart):
                 # Value is a datastore (e.g. BB_ORIGENV) - need to handle this carefully
                 idx = command.remotedatastores.check_store(content, True)
-                return {'_content': DataStoreConnectionHandle(idx), '_connector_origtype': 'DataStoreConnectionHandle'}
+                return {'_content': DataStoreConnectionHandle(idx),
+                        '_connector_origtype': 'DataStoreConnectionHandle',
+                        '_connector_overrides': overridedata}
             elif isinstance(content, set):
-                return {'_content': list(content), '_connector_origtype': 'set'}
+                return {'_content': list(content),
+                        '_connector_origtype': 'set',
+                        '_connector_overrides': overridedata}
+            else:
+                value['_connector_overrides'] = overridedata
         return value
     dataStoreConnectorFindVar.readonly = True