2 files changed, 9 insertions, 1 deletions

diff --git a/bitbake/lib/bb/cooker.py b/bitbake/lib/bb/cooker.py
index 8776e187ea..dd45ae8173 100644
--- a/bitbake/lib/bb/cooker.py
+++ b/bitbake/lib/bb/cooker.py
@@ -81,7 +81,7 @@ class SkippedPackage:
 
 
 class CookerFeatures(object):
-    _feature_list = [HOB_EXTRA_CACHES] = range(1)
+    _feature_list = [HOB_EXTRA_CACHES, SEND_DEPENDS_TREE] = range(2)
 
     def __init__(self):
         self._features=set()
@@ -457,7 +457,10 @@ class BBCooker:
         runlist, taskdata = self.prepareTreeData(pkgs_to_build, task)
         rq = bb.runqueue.RunQueue(self, self.data, self.recipecache, taskdata, runlist)
         rq.rqdata.prepare()
+        return self.buildDependTree(rq, taskdata)
 
+
+    def buildDependTree(self, rq, taskdata):
         seen_fnids = []
         depend_tree = {}
         depend_tree["depends"] = {}
diff --git a/bitbake/lib/bb/runqueue.py b/bitbake/lib/bb/runqueue.py
index 6346c7711a..472509fa10 100644
--- a/bitbake/lib/bb/runqueue.py
+++ b/bitbake/lib/bb/runqueue.py
@@ -999,6 +999,11 @@ class RunQueue:
             else:
                 self.state = runQueueSceneInit
 
+                # we are ready to run, see if any UI client needs the dependency info
+                if bb.cooker.CookerFeatures.SEND_DEPENDS_TREE in self.cooker.featureset:
+                    depgraph = self.cooker.buildDependTree(self, self.rqdata.taskData)
+                    bb.event.fire(bb.event.DepTreeGenerated(depgraph), self.cooker.data)
+
         if self.state is runQueueSceneInit:
             if self.cooker.configuration.dump_signatures:
                 self.dump_signatures()