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comparison mercurial/revlogutils/constants.py @ 47266:921648d31553

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changelogv2: use a dedicated version number If we want to change the format, we need a new version number. We start with that. Differential Revision: https://phab.mercurial-scm.org/D10663
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Mon, 29 Mar 2021 20:46:56 +0200
parents ff9fd7107d11
children 25ce16bf724b
comparison
equal deleted inserted replaced
47265:a07381751dc9 47266:921648d31553
34 ## revlog version 34 ## revlog version
35 REVLOGV0 = 0 35 REVLOGV0 = 0
36 REVLOGV1 = 1 36 REVLOGV1 = 1
37 # Dummy value until file format is finalized. 37 # Dummy value until file format is finalized.
38 REVLOGV2 = 0xDEAD 38 REVLOGV2 = 0xDEAD
39 # Dummy value until file format is finalized.
40 CHANGELOGV2 = 0xD34D
39 41
40 ## global revlog header flags 42 ## global revlog header flags
41 # Shared across v1 and v2. 43 # Shared across v1 and v2.
42 FLAG_INLINE_DATA = 1 << 16 44 FLAG_INLINE_DATA = 1 << 16
43 # Only used by v1, implied by v2. 45 # Only used by v1, implied by v2.
46 REVLOG_DEFAULT_FORMAT = REVLOGV1 48 REVLOG_DEFAULT_FORMAT = REVLOGV1
47 REVLOG_DEFAULT_VERSION = REVLOG_DEFAULT_FORMAT | REVLOG_DEFAULT_FLAGS 49 REVLOG_DEFAULT_VERSION = REVLOG_DEFAULT_FORMAT | REVLOG_DEFAULT_FLAGS
48 REVLOGV0_FLAGS = 0 50 REVLOGV0_FLAGS = 0
49 REVLOGV1_FLAGS = FLAG_INLINE_DATA | FLAG_GENERALDELTA 51 REVLOGV1_FLAGS = FLAG_INLINE_DATA | FLAG_GENERALDELTA
50 REVLOGV2_FLAGS = FLAG_INLINE_DATA 52 REVLOGV2_FLAGS = FLAG_INLINE_DATA
53 CHANGELOGV2_FLAGS = 0
51 54
52 ### individual entry 55 ### individual entry
53 56
54 ## index v0: 57 ## index v0:
55 # 4 bytes: offset 58 # 4 bytes: offset
139 142
140 SUPPORTED_FLAGS = { 143 SUPPORTED_FLAGS = {
141 REVLOGV0: REVLOGV0_FLAGS, 144 REVLOGV0: REVLOGV0_FLAGS,
142 REVLOGV1: REVLOGV1_FLAGS, 145 REVLOGV1: REVLOGV1_FLAGS,
143 REVLOGV2: REVLOGV2_FLAGS, 146 REVLOGV2: REVLOGV2_FLAGS,
147 CHANGELOGV2: CHANGELOGV2_FLAGS,
144 } 148 }
145 149
146 _no = lambda flags: False 150 _no = lambda flags: False
147 _yes = lambda flags: True 151 _yes = lambda flags: True
148 152
171 b'inline': _no, 175 b'inline': _no,
172 b'generaldelta': _yes, 176 b'generaldelta': _yes,
173 b'sidedata': True, 177 b'sidedata': True,
174 b'docket': True, 178 b'docket': True,
175 }, 179 },
180 CHANGELOGV2: {
181 b'inline': _no,
182 # General delta is useless for changelog since we don't do any delta
183 b'generaldelta': _no,
184 b'sidedata': True,
185 b'docket': True,
186 },
176 } 187 }
177 188
178 189
179 SPARSE_REVLOG_MAX_CHAIN_LENGTH = 1000 190 SPARSE_REVLOG_MAX_CHAIN_LENGTH = 1000