Move Inspector out of app.py

Author: kevinschoon

src/buildstream/_frontend/app.py

@@ -66,7 +66,6 @@ def __init__(self, main_options):
         self.logger = None  # The LogLine object
         self.interactive = None  # Whether we are running in interactive mode
         self.colors = None  # Whether to use colors in logging
-        self.inspector = None # If inspection is required
 
         #
         # Private members
@@ -304,9 +303,6 @@ def initialized(self, *, session_name=None):
             #
             self.stream.set_project(self.project)
 
-            # Initialize the inspector
-            self.inspector = Inspector(self.stream, self.project, self.context)
-
             # Run the body of the session here, once everything is loaded
             try:
                 yield

src/buildstream/_frontend/cli.py

@@ -24,6 +24,7 @@
 from ..types import _CacheBuildTrees, _SchedulerErrorAction, _PipelineSelection, _HostMount, _Scope
 from .._remotespec import RemoteSpec, RemoteSpecPurpose
 from ..utils import UtilError
+from .inspect import Inspector
 
 
 ##################################################################
@@ -592,7 +593,8 @@ def inspect(app, elements, deps):
 
     """
     with app.initialized():
-        app.inspector.dump_to_stdout(elements, selection=deps)
+        inspector = Inspector(app.stream, app.project, app.context)
+        inspector.dump_to_stdout(elements, selection=deps)
 
 
 ##################################################################