_frontend/main.py: Fix stack track when project has no element-path

project.conf is not required to specify any element-path, and our
shallow parse is not as smart as instantiating a Project() instance
which we would rather avoid when doing completions.

1 files changed, 6 insertions, 1 deletions

diff --git a/buildstream/_frontend/main.py b/buildstream/_frontend/main.py
index 566a98a2a..e2b2f8c2a 100644
--- a/buildstream/_frontend/main.py
+++ b/buildstream/_frontend/main.py
@@ -74,12 +74,17 @@ def complete_target(ctx, args, incomplete):
     element_directory = None
     try:
         project = _yaml.load(project_file)
-        element_directory = project['element-path']
     except LoadError:
         # If there is no project directory in context, just dont
         # even bother trying to complete anything.
         return []
 
+    # The project is not required to have an element-path
+    try:
+        element_directory = project['element-path']
+    except KeyError:
+        pass
+
     # If a project was loaded, use it's element-path to
     # adjust our completion's base directory
     if element_directory: