Add flag for debugging state of build graph

Most of the time knowing the state of the build
graph isn't that useful for debugging distbuild,
but it may be useful in some situations.

1 files changed, 10 insertions, 8 deletions

diff --git a/distbuild/build_controller.py b/distbuild/build_controller.py
index 58f0f429..da9e97c1 100644
--- a/distbuild/build_controller.py
+++ b/distbuild/build_controller.py
@@ -165,6 +165,7 @@ class BuildController(distbuild.StateMachine):
         self._morph_instance = morph_instance
         self._helper_id = None
         self.debug_transitions = False
+        self.debug_graph_state = False
 
     def __repr__(self):
         return '<BuildController at 0x%x, request-id %s>' % (id(self),
@@ -394,14 +395,15 @@ class BuildController(distbuild.StateMachine):
             return
 
         logging.debug('Queuing more worker-builds to run')
-        logging.debug('Current state of build graph nodes:')
-        for a in map_build_graph(self._artifact, lambda a: a):
-            logging.debug('  %s state is %s' % (a.name, a.state))
-            if a.state != BUILT:
-                for dep in a.dependencies:
-                    logging.debug(
-                        '    depends on %s which is %s' % 
-                            (dep.name, dep.state))
+        if self.debug_graph_state:
+            logging.debug('Current state of build graph nodes:')
+            for a in map_build_graph(self._artifact, lambda a: a):
+                logging.debug('  %s state is %s' % (a.name, a.state))
+                if a.state != BUILT:
+                    for dep in a.dependencies:
+                        logging.debug(
+                            '    depends on %s which is %s' %
+                                (dep.name, dep.state))
 
         while True:
             ready = self._find_artifacts_that_are_ready_to_build()