_sandboxremote.py: Remove print statements and correct some mistakes

buildstream/sandbox/_sandboxremote.py

@@ -139,7 +139,6 @@ class SandboxRemote(Sandbox):
         command_digest = cascache.push_message(casremote, remote_command)
         if not command_digest or not cascache.verify_digest_on_remote(casremote, command_digest):
             raise SandboxError("Failed pushing build command to remote CAS.")
-        print("Created command digest: {}".format(command_digest.hash))
         # Create and send the action.
         action = remote_execution_pb2.Action(command_digest=command_digest,
                                              input_root_digest=input_root_digest,
@@ -148,7 +147,6 @@ class SandboxRemote(Sandbox):
 
         # Upload the Action message to the remote CAS server
         action_digest = cascache.push_message(casremote, action)
-        print("Created action digest: {}".format(action_digest.hash))
         if not action_digest or not cascache.verify_digest_on_remote(casremote, action_digest):
             raise SandboxError("Failed pushing build action to remote CAS.")
 
@@ -166,6 +164,7 @@ class SandboxRemote(Sandbox):
         stub = remote_execution_pb2_grpc.ExecutionStub(channel)
         request = remote_execution_pb2.ExecuteRequest(action_digest=action_digest,
                                                       skip_cache_lookup=False)
+        self.operation_name = None
 
         def __run_remote_command(stub, execute_request=None, running_operation=None):
             try:
@@ -289,14 +288,14 @@ class SandboxRemote(Sandbox):
         # Upload sources
         upload_vdir = self.get_virtual_directory()
 
+        cascache = self._get_context().get_cascache()
         if isinstance(upload_vdir, FileBasedDirectory):
             # Make a new temporary directory to put source in
-            upload_vdir = CasBasedDirectory(self._get_context().artifactcache.cas, ref=None)
+            upload_vdir = CasBasedDirectory(cascache, ref=None)
             upload_vdir.import_files(self.get_virtual_directory()._get_underlying_directory())
 
         upload_vdir.recalculate_hash()
 
-        cascache = context.get_cascache()
         casremote = CASRemote(self.storage_remote_spec)
         # Now, push that key (without necessarily needing a ref) to the remote.