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annotate mercurial/revlogutils/constants.py @ 39538:154e4f84b51c

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treemanifest: use visitchildrenset when filtering a manifest to a matcher Differential Revision: https://phab.mercurial-scm.org/D4370
author Kyle Lippincott <spectral@google.com>
date Thu, 23 Aug 2018 00:44:10 -0700
parents b66ea3fc3a86
children 8e398628a3f2
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1 # revlogdeltas.py - constant used for revlog logic
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2 #
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3 # Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
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4 # Copyright 2018 Octobus <contact@octobus.net>
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5 #
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6 # This software may be used and distributed according to the terms of the
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7 # GNU General Public License version 2 or any later version.
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8 """Helper class to compute deltas stored inside revlogs"""
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9
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10 from __future__ import absolute_import
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11
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12 from .. import (
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13 util,
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14 )
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15
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16 # revlog header flags
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17 REVLOGV0 = 0
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18 REVLOGV1 = 1
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19 # Dummy value until file format is finalized.
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20 # Reminder: change the bounds check in revlog.__init__ when this is changed.
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21 REVLOGV2 = 0xDEAD
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22 FLAG_INLINE_DATA = (1 << 16)
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23 FLAG_GENERALDELTA = (1 << 17)
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24 REVLOG_DEFAULT_FLAGS = FLAG_INLINE_DATA
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25 REVLOG_DEFAULT_FORMAT = REVLOGV1
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26 REVLOG_DEFAULT_VERSION = REVLOG_DEFAULT_FORMAT | REVLOG_DEFAULT_FLAGS
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27 REVLOGV1_FLAGS = FLAG_INLINE_DATA | FLAG_GENERALDELTA
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28 REVLOGV2_FLAGS = REVLOGV1_FLAGS
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30 # revlog index flags
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31 REVIDX_ISCENSORED = (1 << 15) # revision has censor metadata, must be verified
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32 REVIDX_ELLIPSIS = (1 << 14) # revision hash does not match data (narrowhg)
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33 REVIDX_EXTSTORED = (1 << 13) # revision data is stored externally
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34 REVIDX_DEFAULT_FLAGS = 0
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35 # stable order in which flags need to be processed and their processors applied
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36 REVIDX_FLAGS_ORDER = [
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37 REVIDX_ISCENSORED,
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38 REVIDX_ELLIPSIS,
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39 REVIDX_EXTSTORED,
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40 ]
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41 REVIDX_KNOWN_FLAGS = util.bitsfrom(REVIDX_FLAGS_ORDER)
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42 # bitmark for flags that could cause rawdata content change
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43 REVIDX_RAWTEXT_CHANGING_FLAGS = REVIDX_ISCENSORED | REVIDX_EXTSTORED
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45 SPARSE_REVLOG_MAX_CHAIN_LENGTH = 1000
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