277         if create:

   277         if create:

   278             self._writerequirements()

   278             self._writerequirements()

   279 

   279 

   280 

   280 

   281         self._branchcaches = {}

   281         self._branchcaches = {}

   282         self.filterpats = {}

   283         self.filterpats = {}

   283         self._datafilters = {}

   284         self._datafilters = {}

   284         self._transref = self._lockref = self._wlockref = None

   285         self._transref = self._lockref = self._wlockref = None

   285 

   286 

   286         # A cache for various files under .hg/ that tracks file changes,

   287         # A cache for various files under .hg/ that tracks file changes,

   724         '''returns a dictionary {branch: [branchheads]} with branchheads

   725         '''returns a dictionary {branch: [branchheads]} with branchheads

   725         ordered by increasing revision number'''

   726         ordered by increasing revision number'''

   726         branchmap.updatecache(self)

   727         branchmap.updatecache(self)

   727         return self._branchcaches[self.filtername]

   728         return self._branchcaches[self.filtername]

   728 

   729 

   729     def branchtip(self, branch, ignoremissing=False):

   736     def branchtip(self, branch, ignoremissing=False):

   730         '''return the tip node for a given branch

   737         '''return the tip node for a given branch

   731 

   738 

   732         If ignoremissing is True, then this method will not raise an error.

   739         If ignoremissing is True, then this method will not raise an error.

   733         This is helpful for callers that only expect None for a missing branch

   740         This is helpful for callers that only expect None for a missing branch