bitbake: siggen: Directly store datacaches reference

It is becomming clear the siggen needs access to our cache data but we
can't always obtain it in the contexts we need to. Add it directly,
meaning over time we should be able to simplify the APIs and stop
convoluting new ones!

(Bitbake rev: 6b213590ed0e77683cf7fbce6bbe9605ddecf3d3)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/runqueue.py

@@ -651,6 +651,8 @@ class RunQueueData:
             # Nothing to do
             return 0
 
+        bb.parse.siggen.setup_datacache(self.dataCaches)
+
         self.init_progress_reporter.start()
         self.init_progress_reporter.next_stage()
 

bitbake/lib/bb/siggen.py

@@ -70,6 +70,9 @@ class SignatureGenerator(object):
     def postparsing_clean_cache(self):
         return
 
+    def setup_datacache(self, datacaches):
+        self.datacaches = datacaches
+
     def get_unihash(self, tid):
         return self.taskhash[tid]