constants.py
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r39365 | # revlogdeltas.py - constant used for revlog logic | ||
# | ||||
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r47575 | # Copyright 2005-2007 Olivia Mackall <olivia@selenic.com> | ||
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r39365 | # 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 | ||||
r47615 | import struct | |||
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r43346 | from ..interfaces import repository | ||
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r39365 | |||
r47614 | ### main revlog header | |||
## revlog version | ||||
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r39365 | REVLOGV0 = 0 | ||
REVLOGV1 = 1 | ||||
# Dummy value until file format is finalized. | ||||
REVLOGV2 = 0xDEAD | ||||
r47614 | ||||
## global revlog header flags | ||||
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r41238 | # Shared across v1 and v2. | ||
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r43346 | FLAG_INLINE_DATA = 1 << 16 | ||
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r41238 | # Only used by v1, implied by v2. | ||
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r43346 | FLAG_GENERALDELTA = 1 << 17 | ||
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r39365 | 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 | ||||
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r41238 | REVLOGV2_FLAGS = FLAG_INLINE_DATA | ||
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r39365 | |||
r47614 | ### individual entry | |||
r47615 | ## index v0: | |||
# 4 bytes: offset | ||||
# 4 bytes: compressed length | ||||
# 4 bytes: base rev | ||||
# 4 bytes: link rev | ||||
# 20 bytes: parent 1 nodeid | ||||
# 20 bytes: parent 2 nodeid | ||||
# 20 bytes: nodeid | ||||
INDEX_ENTRY_V0 = struct.Struct(b">4l20s20s20s") | ||||
r47616 | ## index v1 | |||
# 6 bytes: offset | ||||
# 2 bytes: flags | ||||
# 4 bytes: compressed length | ||||
# 4 bytes: uncompressed length | ||||
# 4 bytes: base rev | ||||
# 4 bytes: link rev | ||||
# 4 bytes: parent 1 rev | ||||
# 4 bytes: parent 2 rev | ||||
# 32 bytes: nodeid | ||||
INDEX_ENTRY_V1 = struct.Struct(b">Qiiiiii20s12x") | ||||
assert INDEX_ENTRY_V1.size == 32 * 2 | ||||
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r39365 | # revlog index flags | ||
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r40083 | |||
# 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 | ||||
r43300 | # revision data contains extra metadata not part of the official digest | |||
REVIDX_SIDEDATA = repository.REVISION_FLAG_SIDEDATA | ||||
r46263 | # revision changes files in a way that could affect copy tracing. | |||
REVIDX_HASCOPIESINFO = repository.REVISION_FLAG_HASCOPIESINFO | ||||
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r39365 | 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, | ||||
r43300 | REVIDX_SIDEDATA, | |||
r46263 | REVIDX_HASCOPIESINFO, | |||
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r39365 | ] | ||
r42956 | ||||
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r39365 | # bitmark for flags that could cause rawdata content change | ||
r43300 | REVIDX_RAWTEXT_CHANGING_FLAGS = ( | |||
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r43346 | REVIDX_ISCENSORED | REVIDX_EXTSTORED | REVIDX_SIDEDATA | ||
r43300 | ) | |||
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r39542 | |||
SPARSE_REVLOG_MAX_CHAIN_LENGTH = 1000 | ||||