mercurial/localrepo.py

50083:a28cedb26139

        # avoid eager cache invalidation. in-memory data should be identical
        # to stored data if transaction has no error.
        tr.addpostclose(b'refresh-filecachestats', self._refreshfilecachestats)
        self._transref = weakref.ref(tr)
        scmutil.registersummarycallback(self, tr, desc)
        return tr

    def _journalfiles(self):
        first = (
            (self.svfs, b'journal'),

50084:5b9c3ae807c8

        # avoid eager cache invalidation. in-memory data should be identical
        # to stored data if transaction has no error.
        tr.addpostclose(b'refresh-filecachestats', self._refreshfilecachestats)
        self._transref = weakref.ref(tr)
        scmutil.registersummarycallback(self, tr, desc)
        # This only exist to deal with the need of rollback to have viable
        # parents at the end of the operation. So backup viable parents at the
        # time of this operation.
        #
        # We only do it when the `wlock` is taken, otherwise other might be
        # altering the dirstate under us.
        #
        # This is really not a great way to do this (first, because we cannot
        # always do it). There are more viable alternative that exists
        #
        # - backing only the working copy parent in a dedicated files and doing
        #   a clean "keep-update" to them on `hg rollback`.
        #
        # - slightly changing the behavior an applying a logic similar to "hg
        # strip" to pick a working copy destination on `hg rollback`
        if self.currentwlock() is not None:
            ds = self.dirstate

            def backup_dirstate(tr):
                for f in ds.all_file_names():
                    # hardlink backup is okay because `dirstate` is always
                    # atomically written and possible data file are append only
                    # and resistant to trailing data.
                    tr.addbackup(f, hardlink=True, location=b'plain')

            tr.addvalidator(b'dirstate-backup', backup_dirstate)
        return tr

    def _journalfiles(self):
        first = (
            (self.svfs, b'journal'),