306     return set(c.node() for c in foreground)

   306     return set(c.node() for c in foreground)

   307 

   307 

   308 # logic around storing and using effect flags

   308 # logic around storing and using effect flags

   309 EFFECTFLAGFIELD = "ef1"

   309 EFFECTFLAGFIELD = "ef1"

   310 

   310 

   311 def geteffectflag(relation):

   313 def geteffectflag(relation):

   312     """ From an obs-marker relation, compute what changed between the

   314     """ From an obs-marker relation, compute what changed between the

   313     predecessor and the successor.

   315     predecessor and the successor.

   314     """

   316     """

   315     effects = 0

   317     effects = 0

   316 

   318 

   317     source = relation[0]

   319     source = relation[0]

   318 

   325 

   319     return effects

   326     return effects

   320 

   327 

   321 def getobsoleted(repo, tr):

   328 def getobsoleted(repo, tr):

   322     """return the set of pre-existing revisions obsoleted by a transaction"""

   329     """return the set of pre-existing revisions obsoleted by a transaction"""