Store the actual Mercurial revision that was used as a base (#100)

Author: marco-c

libmozevent/mercurial.py

@@ -160,6 +160,9 @@ def apply_build(self, build):
             )
             hg_base = self.default_revision
 
+        # Store the actual base revision we used
+        self.actual_base_revision = hg_base
+
         # Update the repo to base revision
         try:
             logger.info("Updating repo to revision {}".format(hg_base))

libmozevent/phabricator.py

@@ -48,6 +48,7 @@ def __init__(self, request):
         self.stack = []
         self.base_revision = None
         self.missing_base_revision = False
+        self.actual_base_revision = None
 
     def __str__(self):
         return "Revision {} - {}".format(self.revision_id, self.target_phid)