comparison mercurial/localrepo.py @ 9151:f528d1a93491

tags: implement persistent tag caching (issue548).

- rename findglobaltags() to findglobaltags1() (so the "no cache"
  implementation is still there if we need it)
- add findglobaltags2() and make findglobaltags() an alias for it
  (disabling tag caching is a one-line patch)
- factor out tagcache class with methods readcache() and writecache();
  the expensive part of tag finding (iterate over heads and find
  .hgtags filenode) is now in tagcache.readcache()

9150:09a1ee498756

    def destroyed(self):
        '''Inform the repository that nodes have been destroyed.
        Intended for use by strip and rollback, so there's a common
        place for anything that has to be done after destroying history.'''
        # Do nothing for now: this is a placeholder that will be used
        # when we add tag caching.
        # XXX it might be nice if we could take the list of destroyed
        # nodes, but I don't see an easy way for rollback() to do that
        pass

    def walk(self, match, node=None):
        '''
        walk recursively through the directory tree or a given
        changeset, finding all files matched by the match

9151:f528d1a93491

    def destroyed(self):
        '''Inform the repository that nodes have been destroyed.
        Intended for use by strip and rollback, so there's a common
        place for anything that has to be done after destroying history.'''
        # XXX it might be nice if we could take the list of destroyed
        # nodes, but I don't see an easy way for rollback() to do that

        # Ensure the persistent tag cache is updated.  Doing it now
        # means that the tag cache only has to worry about destroyed
        # heads immediately after a strip/rollback.  That in turn
        # guarantees that "cachetip == currenttip" (comparing both rev
        # and node) always means no nodes have been added or destroyed.

        # XXX this is suboptimal when qrefresh'ing: we strip the current
        # head, refresh the tag cache, then immediately add a new head.
        # But I think doing it this way is necessary for the "instant
        # tag cache retrieval" case to work.
        tags_.findglobaltags(self.ui, self, {}, {})

    def walk(self, match, node=None):
        '''
        walk recursively through the directory tree or a given
        changeset, finding all files matched by the match