Enable the stale.py tool to work with Qt projects

waflib/extras/stale.py

@@ -15,17 +15,25 @@ nodes/tasks, in which case the method will have to be modified
 to exclude some folders for example.
 """
 
-from waflib import Logs
+from waflib import Logs, Build
 from waflib.Runner import Parallel
+
+DYNAMIC_EXT = ['.moc']
+
 old = Parallel.refill_task_list
 def refill_task_list(self):
 	iit = old(self)
 	bld = self.bld
 
+	# this does not work in partial builds
 	if bld.options.targets and bld.options.targets != '*':
 		return iit
 
-	# execute only once
+	# this does not work in dynamic builds
+	if bld.post_mode == Build.POST_LAZY:
+		return iit
+
+	# execute this operation only once - using refill_task_list is
 	if getattr(self, 'clean', False):
 		return iit
 	self.clean = True
@@ -47,9 +55,13 @@ def refill_task_list(self):
 				if x.name != "c4che":
 					iter(x)
 		else:
-			if not node in nodes:
-				Logs.warn("stale file found -> %s" % node.abspath())
-				node.delete()
+			for ext in DYNAMIC_EXT:
+				if node.name.endswith(ext):
+					break
+			else:
+				if not node in nodes:
+					Logs.warn("Removing stale file -> %s" % node.abspath())
+					node.delete()
 	iter(bld.bldnode)
 	return iit