Mercurial > hg

annotate mercurial/revlogutils/constants.py @ 42045:d7e751ec679e

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
compression: display compression level in debugformat Now that we have options to control the compression level, we teach `hg debugformat` about them. This is a useful information when comparing repositories. Note that we have no trace of the compression level used to store existing deltas. Actually, it would even varies from one delta to another. So we display the currently set value.
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Tue, 02 Apr 2019 11:03:46 -0700
parents e7a2cc84dbc0
children 92ac6b1697a7
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
39329
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
1 # revlogdeltas.py - constant used for revlog logic
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
2 #
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
3 # Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
4 # Copyright 2018 Octobus <contact@octobus.net>
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
5 #
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
6 # This software may be used and distributed according to the terms of the
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
7 # GNU General Public License version 2 or any later version.
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
8 """Helper class to compute deltas stored inside revlogs"""
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
9
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
10 from __future__ import absolute_import
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
11
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
12 from .. import (
40047
8e398628a3f2 repository: define and use revision flag constants
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39506
diff changeset
13 repository,
39329
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
14 util,
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
15 )
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
16
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
17 # revlog header flags
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
18 REVLOGV0 = 0
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
19 REVLOGV1 = 1
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
20 # Dummy value until file format is finalized.
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
21 # Reminder: change the bounds check in revlog.__init__ when this is changed.
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
22 REVLOGV2 = 0xDEAD
41202
e7a2cc84dbc0 revlog: always enable generaldelta on version 2 revlogs
Gregory Szorc <gregory.szorc@gmail.com>
parents: 40047
diff changeset
23 # Shared across v1 and v2.
39329
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
24 FLAG_INLINE_DATA = (1 << 16)
41202
e7a2cc84dbc0 revlog: always enable generaldelta on version 2 revlogs
Gregory Szorc <gregory.szorc@gmail.com>
parents: 40047
diff changeset
25 # Only used by v1, implied by v2.
39329
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
26 FLAG_GENERALDELTA = (1 << 17)
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
27 REVLOG_DEFAULT_FLAGS = FLAG_INLINE_DATA
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
28 REVLOG_DEFAULT_FORMAT = REVLOGV1
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
29 REVLOG_DEFAULT_VERSION = REVLOG_DEFAULT_FORMAT | REVLOG_DEFAULT_FLAGS
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
30 REVLOGV1_FLAGS = FLAG_INLINE_DATA | FLAG_GENERALDELTA
41202
e7a2cc84dbc0 revlog: always enable generaldelta on version 2 revlogs
Gregory Szorc <gregory.szorc@gmail.com>
parents: 40047
diff changeset
31 REVLOGV2_FLAGS = FLAG_INLINE_DATA
39329
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
32
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
33 # revlog index flags
40047
8e398628a3f2 repository: define and use revision flag constants
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39506
diff changeset
34
8e398628a3f2 repository: define and use revision flag constants
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39506
diff changeset
35 # For historical reasons, revlog's internal flags were exposed via the
8e398628a3f2 repository: define and use revision flag constants
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39506
diff changeset
36 # wire protocol and are even exposed in parts of the storage APIs.
8e398628a3f2 repository: define and use revision flag constants
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39506
diff changeset
37
8e398628a3f2 repository: define and use revision flag constants
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39506
diff changeset
38 # revision has censor metadata, must be verified
8e398628a3f2 repository: define and use revision flag constants
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39506
diff changeset
39 REVIDX_ISCENSORED = repository.REVISION_FLAG_CENSORED
8e398628a3f2 repository: define and use revision flag constants
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39506
diff changeset
40 # revision hash does not match data (narrowhg)
8e398628a3f2 repository: define and use revision flag constants
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39506
diff changeset
41 REVIDX_ELLIPSIS = repository.REVISION_FLAG_ELLIPSIS
8e398628a3f2 repository: define and use revision flag constants
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39506
diff changeset
42 # revision data is stored externally
8e398628a3f2 repository: define and use revision flag constants
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39506
diff changeset
43 REVIDX_EXTSTORED = repository.REVISION_FLAG_EXTSTORED
39329
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
44 REVIDX_DEFAULT_FLAGS = 0
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
45 # stable order in which flags need to be processed and their processors applied
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
46 REVIDX_FLAGS_ORDER = [
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
47 REVIDX_ISCENSORED,
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
48 REVIDX_ELLIPSIS,
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
49 REVIDX_EXTSTORED,
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
50 ]
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
51 REVIDX_KNOWN_FLAGS = util.bitsfrom(REVIDX_FLAGS_ORDER)
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
52 # bitmark for flags that could cause rawdata content change
729082bb9938 revlog: split constants into a new `revlogutils.constants` module
Boris Feld <boris.feld@octobus.net>
parents:
diff changeset
53 REVIDX_RAWTEXT_CHANGING_FLAGS = REVIDX_ISCENSORED | REVIDX_EXTSTORED
39506
b66ea3fc3a86 sparse-revlog: set max delta chain length to on thousand
Boris Feld <boris.feld@octobus.net>
parents: 39330
diff changeset
54
b66ea3fc3a86 sparse-revlog: set max delta chain length to on thousand
Boris Feld <boris.feld@octobus.net>
parents: 39330
diff changeset
55 SPARSE_REVLOG_MAX_CHAIN_LENGTH = 1000
b66ea3fc3a86 sparse-revlog: set max delta chain length to on thousand
Boris Feld <boris.feld@octobus.net>
parents: 39330
diff changeset
56