|
|
# revlogdeltas.py - constant used for revlog logic
|
|
|
#
|
|
|
# Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
|
|
|
# Copyright 2018 Octobus <contact@octobus.net>
|
|
|
#
|
|
|
# This software may be used and distributed according to the terms of the
|
|
|
# GNU General Public License version 2 or any later version.
|
|
|
"""Helper class to compute deltas stored inside revlogs"""
|
|
|
|
|
|
from __future__ import absolute_import
|
|
|
|
|
|
from ..interfaces import repository
|
|
|
|
|
|
# revlog header flags
|
|
|
REVLOGV0 = 0
|
|
|
REVLOGV1 = 1
|
|
|
# Dummy value until file format is finalized.
|
|
|
# Reminder: change the bounds check in revlog.__init__ when this is changed.
|
|
|
REVLOGV2 = 0xDEAD
|
|
|
# Shared across v1 and v2.
|
|
|
FLAG_INLINE_DATA = 1 << 16
|
|
|
# Only used by v1, implied by v2.
|
|
|
FLAG_GENERALDELTA = 1 << 17
|
|
|
REVLOG_DEFAULT_FLAGS = FLAG_INLINE_DATA
|
|
|
REVLOG_DEFAULT_FORMAT = REVLOGV1
|
|
|
REVLOG_DEFAULT_VERSION = REVLOG_DEFAULT_FORMAT | REVLOG_DEFAULT_FLAGS
|
|
|
REVLOGV1_FLAGS = FLAG_INLINE_DATA | FLAG_GENERALDELTA
|
|
|
REVLOGV2_FLAGS = FLAG_INLINE_DATA
|
|
|
|
|
|
# revlog index flags
|
|
|
|
|
|
# For historical reasons, revlog's internal flags were exposed via the
|
|
|
# wire protocol and are even exposed in parts of the storage APIs.
|
|
|
|
|
|
# revision has censor metadata, must be verified
|
|
|
REVIDX_ISCENSORED = repository.REVISION_FLAG_CENSORED
|
|
|
# revision hash does not match data (narrowhg)
|
|
|
REVIDX_ELLIPSIS = repository.REVISION_FLAG_ELLIPSIS
|
|
|
# revision data is stored externally
|
|
|
REVIDX_EXTSTORED = repository.REVISION_FLAG_EXTSTORED
|
|
|
# revision data contains extra metadata not part of the official digest
|
|
|
REVIDX_SIDEDATA = repository.REVISION_FLAG_SIDEDATA
|
|
|
REVIDX_DEFAULT_FLAGS = 0
|
|
|
# stable order in which flags need to be processed and their processors applied
|
|
|
REVIDX_FLAGS_ORDER = [
|
|
|
REVIDX_ISCENSORED,
|
|
|
REVIDX_ELLIPSIS,
|
|
|
REVIDX_EXTSTORED,
|
|
|
REVIDX_SIDEDATA,
|
|
|
]
|
|
|
|
|
|
# bitmark for flags that could cause rawdata content change
|
|
|
REVIDX_RAWTEXT_CHANGING_FLAGS = (
|
|
|
REVIDX_ISCENSORED | REVIDX_EXTSTORED | REVIDX_SIDEDATA
|
|
|
)
|
|
|
|
|
|
SPARSE_REVLOG_MAX_CHAIN_LENGTH = 1000
|
|
|
|
