element.py: Updating comment for _assemble_done()

This was misinforming that it is only called in a subprocess,
it also needs to be called in the main process, also point out
that updating element state is a side effect of this.

1 files changed, 3 insertions, 1 deletions

diff --git a/buildstream/element.py b/buildstream/element.py
index 24ea89664..2e3ae6a56 100644
--- a/buildstream/element.py
+++ b/buildstream/element.py
@@ -885,7 +885,9 @@ class Element(Plugin):
     # _assemble_done():
     #
     # This is called in the main process after the element has been assembled
-    # in a subprocess.
+    # in both the main process and in a subprocess.
+    #
+    # This will result in updating the element state.
     #
     def _assemble_done(self):
         assert self.__assemble_scheduled