comparison mercurial/revlog.py @ 47259:07641bafa646

revlog: compress sidedata when doing "post-pull" sidedata update

All path writing sidedata are now using compression (when appropriate).

Differential Revision: https://phab.mercurial-scm.org/D10656

47258:c4dbb7636a12

                )

                serialized_sidedata = sidedatautil.serialize_sidedata(
                    new_sidedata
                )
                if entry[8] != 0 or entry[9] != 0:
                    # rewriting entries that already have sidedata is not
                    # supported yet, because it introduces garbage data in the
                    # revlog.
                    msg = b"rewriting existing sidedata is not supported yet"

                new_offset_flags = entry[0] | flags[0] & ~flags[1]
                entry_update = (
                    current_offset,
                    len(serialized_sidedata),
                    new_offset_flags,
                )

                # the sidedata computation might have move the file cursors around
                dfh.seek(current_offset, os.SEEK_SET)
                dfh.write(serialized_sidedata)

47259:07641bafa646

                )

                serialized_sidedata = sidedatautil.serialize_sidedata(
                    new_sidedata
                )

                sidedata_compression_mode = COMP_MODE_INLINE
                if serialized_sidedata and self.hassidedata:
                    sidedata_compression_mode = COMP_MODE_PLAIN
                    h, comp_sidedata = self.compress(serialized_sidedata)
                    if (
                        h != b'u'
                        and comp_sidedata[0] != b'\0'
                        and len(comp_sidedata) < len(serialized_sidedata)
                    ):
                        assert not h
                        if (
                            comp_sidedata[0]
                            == self._docket.default_compression_header
                        ):
                            sidedata_compression_mode = COMP_MODE_DEFAULT
                            serialized_sidedata = comp_sidedata
                        else:
                            sidedata_compression_mode = COMP_MODE_INLINE
                            serialized_sidedata = comp_sidedata
                if entry[8] != 0 or entry[9] != 0:
                    # rewriting entries that already have sidedata is not
                    # supported yet, because it introduces garbage data in the
                    # revlog.
                    msg = b"rewriting existing sidedata is not supported yet"

                new_offset_flags = entry[0] | flags[0] & ~flags[1]
                entry_update = (
                    current_offset,
                    len(serialized_sidedata),
                    new_offset_flags,
                    sidedata_compression_mode,
                )

                # the sidedata computation might have move the file cursors around
                dfh.seek(current_offset, os.SEEK_SET)
                dfh.write(serialized_sidedata)