585     good = None

   585     good = None

   586 

   586 

   587     deltas_limit = textlen * LIMIT_DELTA2TEXT

   587     deltas_limit = textlen * LIMIT_DELTA2TEXT

   588 

   588 

   589     tested = set([nullrev])

   589     tested = set([nullrev])

   591         group = []

   595         group = []

   592         for rev in temptative:

   596         for rev in temptative:

   593             # skip over empty delta (no need to include them in a chain)

   597             # skip over empty delta (no need to include them in a chain)

   594             while not (rev == nullrev or rev in tested or deltalength(rev)):

   598             while not (rev == nullrev or rev in tested or deltalength(rev)):

   595                 rev = deltaparent(rev)

   599                 rev = deltaparent(rev)

   630     good = None

   634     good = None

   631     for candidates in _rawgroups(revlog, p1, p2, cachedelta):

   635     for candidates in _rawgroups(revlog, p1, p2, cachedelta):

   632         good = yield candidates

   636         good = yield candidates

   633         if good is not None:

   637         if good is not None:

   634             break

   638             break

   635 

   641 

   636 def _rawgroups(revlog, p1, p2, cachedelta):

   642 def _rawgroups(revlog, p1, p2, cachedelta):

   637     """Provides group of revision to be tested as delta base

   643     """Provides group of revision to be tested as delta base

   638 

   644 

   639     This lower level function focus on emitting delta theorically interresting

   645     This lower level function focus on emitting delta theorically interresting