comparison mercurial/dirstatemap.py @ 47675:48aec076b8fb

dirstate-v2: Enforce data size read from the docket file

The data file may not be shorter than its size given by the docket.
It may be longer, but additional data is ignored.

Differential Revision: https://phab.mercurial-scm.org/D11089

47674:ff97e793ed36

                if self.docket.uuid:
                    # TODO: use mmap when possible
                    data = self._opener.read(self.docket.data_filename())
                else:
                    data = b''
                self._rustmap = rustmod.DirstateMap.new_v2(data)
                parents = self.docket.parents
            else:
                self._rustmap, parents = rustmod.DirstateMap.new_v1(
                    self._use_dirstate_tree, self._readdirstatefile()
                )

47675:48aec076b8fb

                if self.docket.uuid:
                    # TODO: use mmap when possible
                    data = self._opener.read(self.docket.data_filename())
                else:
                    data = b''
                self._rustmap = rustmod.DirstateMap.new_v2(
                    data, self.docket.data_size
                )
                parents = self.docket.parents
            else:
                self._rustmap, parents = rustmod.DirstateMap.new_v1(
                    self._use_dirstate_tree, self._readdirstatefile()
                )