annotate mercurial/revlogutils/deltas.py @ 51052:e80e2d614c9d

revlog: remove legacy usage of `_maxchainlen` All core code is now getting the setting from the DeltaConfig object.
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Tue, 10 Oct 2023 11:05:54 +0200
parents f636103c4d67
children 96f521df2508
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 # revlogdeltas.py - Logic around delta computation for revlog
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2 #
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3 # Copyright 2005-2007 Olivia Mackall <olivia@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
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11 import collections
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12 import struct
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13
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14 # import stuff from node for others to import from revlog
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15 from ..node import nullrev
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16 from ..i18n import _
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17
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18 from .constants import (
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19 COMP_MODE_DEFAULT,
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20 COMP_MODE_INLINE,
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21 COMP_MODE_PLAIN,
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22 DELTA_BASE_REUSE_FORCE,
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23 DELTA_BASE_REUSE_NO,
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24 KIND_CHANGELOG,
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25 KIND_FILELOG,
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26 KIND_MANIFESTLOG,
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27 REVIDX_ISCENSORED,
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28 REVIDX_RAWTEXT_CHANGING_FLAGS,
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29 )
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30
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31 from ..thirdparty import attr
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32
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33 from .. import (
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34 error,
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35 mdiff,
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36 util,
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37 )
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38
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39 from . import flagutil
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40
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41 # maximum <delta-chain-data>/<revision-text-length> ratio
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42 LIMIT_DELTA2TEXT = 2
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43
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44
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45 class _testrevlog:
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46 """minimalist fake revlog to use in doctests"""
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47
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48 def __init__(self, data, density=0.5, mingap=0, snapshot=()):
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49 """data is an list of revision payload boundaries"""
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50 from .. import revlog
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51
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52 self._data = data
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53 self._srdensitythreshold = density
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54 self._srmingapsize = mingap
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55 self.data_config = revlog.DataConfig()
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56 self.data_config.sr_density_threshold = density
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57 self.data_config.sr_min_gap_size = mingap
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58 self.delta_config = revlog.DeltaConfig()
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59 self.feature_config = revlog.FeatureConfig()
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60 self._snapshot = set(snapshot)
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61 self.index = None
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62
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63 def start(self, rev):
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64 if rev == nullrev:
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65 return 0
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66 if rev == 0:
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67 return 0
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68 return self._data[rev - 1]
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69
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70 def end(self, rev):
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71 if rev == nullrev:
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72 return 0
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73 return self._data[rev]
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74
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75 def length(self, rev):
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76 return self.end(rev) - self.start(rev)
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77
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78 def __len__(self):
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79 return len(self._data)
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80
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81 def issnapshot(self, rev):
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82 if rev == nullrev:
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83 return True
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84 return rev in self._snapshot
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85
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86
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87 def slicechunk(revlog, revs, targetsize=None):
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88 """slice revs to reduce the amount of unrelated data to be read from disk.
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89
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90 ``revs`` is sliced into groups that should be read in one time.
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91 Assume that revs are sorted.
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92
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93 The initial chunk is sliced until the overall density (payload/chunks-span
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94 ratio) is above `revlog._srdensitythreshold`. No gap smaller than
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95 `revlog._srmingapsize` is skipped.
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96
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97 If `targetsize` is set, no chunk larger than `targetsize` will be yield.
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98 For consistency with other slicing choice, this limit won't go lower than
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99 `revlog._srmingapsize`.
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100
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101 If individual revisions chunk are larger than this limit, they will still
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102 be raised individually.
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103
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104 >>> data = [
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105 ... 5, #00 (5)
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106 ... 10, #01 (5)
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107 ... 12, #02 (2)
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108 ... 12, #03 (empty)
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109 ... 27, #04 (15)
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110 ... 31, #05 (4)
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111 ... 31, #06 (empty)
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112 ... 42, #07 (11)
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113 ... 47, #08 (5)
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114 ... 47, #09 (empty)
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115 ... 48, #10 (1)
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116 ... 51, #11 (3)
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117 ... 74, #12 (23)
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118 ... 85, #13 (11)
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119 ... 86, #14 (1)
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120 ... 91, #15 (5)
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121 ... ]
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122 >>> revlog = _testrevlog(data, snapshot=range(16))
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123
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124 >>> list(slicechunk(revlog, list(range(16))))
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125 [[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]]
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126 >>> list(slicechunk(revlog, [0, 15]))
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127 [[0], [15]]
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128 >>> list(slicechunk(revlog, [0, 11, 15]))
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129 [[0], [11], [15]]
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130 >>> list(slicechunk(revlog, [0, 11, 13, 15]))
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131 [[0], [11, 13, 15]]
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132 >>> list(slicechunk(revlog, [1, 2, 3, 5, 8, 10, 11, 14]))
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133 [[1, 2], [5, 8, 10, 11], [14]]
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134
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135 Slicing with a maximum chunk size
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136 >>> list(slicechunk(revlog, [0, 11, 13, 15], targetsize=15))
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137 [[0], [11], [13], [15]]
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138 >>> list(slicechunk(revlog, [0, 11, 13, 15], targetsize=20))
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139 [[0], [11], [13, 15]]
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140
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141 Slicing involving nullrev
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142 >>> list(slicechunk(revlog, [-1, 0, 11, 13, 15], targetsize=20))
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143 [[-1, 0], [11], [13, 15]]
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144 >>> list(slicechunk(revlog, [-1, 13, 15], targetsize=5))
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145 [[-1], [13], [15]]
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146 """
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147 if targetsize is not None:
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148 targetsize = max(targetsize, revlog._srmingapsize)
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149 # targetsize should not be specified when evaluating delta candidates:
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150 # * targetsize is used to ensure we stay within specification when reading,
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151 densityslicing = getattr(revlog.index, 'slicechunktodensity', None)
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152 if densityslicing is None:
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153 densityslicing = lambda x, y, z: _slicechunktodensity(revlog, x, y, z)
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154 for chunk in densityslicing(
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155 revs, revlog._srdensitythreshold, revlog._srmingapsize
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156 ):
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157 for subchunk in _slicechunktosize(revlog, chunk, targetsize):
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158 yield subchunk
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159
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160
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161 def _slicechunktosize(revlog, revs, targetsize=None):
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162 """slice revs to match the target size
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163
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164 This is intended to be used on chunk that density slicing selected by that
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165 are still too large compared to the read garantee of revlog. This might
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166 happens when "minimal gap size" interrupted the slicing or when chain are
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167 built in a way that create large blocks next to each other.
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168
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169 >>> data = [
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170 ... 3, #0 (3)
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171 ... 5, #1 (2)
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172 ... 6, #2 (1)
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173 ... 8, #3 (2)
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174 ... 8, #4 (empty)
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175 ... 11, #5 (3)
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176 ... 12, #6 (1)
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177 ... 13, #7 (1)
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178 ... 14, #8 (1)
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179 ... ]
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180
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181 == All snapshots cases ==
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182 >>> revlog = _testrevlog(data, snapshot=range(9))
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183
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184 Cases where chunk is already small enough
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185 >>> list(_slicechunktosize(revlog, [0], 3))
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186 [[0]]
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187 >>> list(_slicechunktosize(revlog, [6, 7], 3))
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188 [[6, 7]]
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189 >>> list(_slicechunktosize(revlog, [0], None))
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190 [[0]]
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191 >>> list(_slicechunktosize(revlog, [6, 7], None))
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192 [[6, 7]]
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193
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194 cases where we need actual slicing
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195 >>> list(_slicechunktosize(revlog, [0, 1], 3))
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196 [[0], [1]]
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197 >>> list(_slicechunktosize(revlog, [1, 3], 3))
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198 [[1], [3]]
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199 >>> list(_slicechunktosize(revlog, [1, 2, 3], 3))
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200 [[1, 2], [3]]
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201 >>> list(_slicechunktosize(revlog, [3, 5], 3))
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202 [[3], [5]]
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203 >>> list(_slicechunktosize(revlog, [3, 4, 5], 3))
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204 [[3], [5]]
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205 >>> list(_slicechunktosize(revlog, [5, 6, 7, 8], 3))
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206 [[5], [6, 7, 8]]
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207 >>> list(_slicechunktosize(revlog, [0, 1, 2, 3, 4, 5, 6, 7, 8], 3))
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208 [[0], [1, 2], [3], [5], [6, 7, 8]]
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209
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210 Case with too large individual chunk (must return valid chunk)
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211 >>> list(_slicechunktosize(revlog, [0, 1], 2))
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212 [[0], [1]]
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213 >>> list(_slicechunktosize(revlog, [1, 3], 1))
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214 [[1], [3]]
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215 >>> list(_slicechunktosize(revlog, [3, 4, 5], 2))
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216 [[3], [5]]
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217
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218 == No Snapshot cases ==
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219 >>> revlog = _testrevlog(data)
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220
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221 Cases where chunk is already small enough
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222 >>> list(_slicechunktosize(revlog, [0], 3))
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223 [[0]]
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224 >>> list(_slicechunktosize(revlog, [6, 7], 3))
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225 [[6, 7]]
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226 >>> list(_slicechunktosize(revlog, [0], None))
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227 [[0]]
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228 >>> list(_slicechunktosize(revlog, [6, 7], None))
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229 [[6, 7]]
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230
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231 cases where we need actual slicing
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232 >>> list(_slicechunktosize(revlog, [0, 1], 3))
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233 [[0], [1]]
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234 >>> list(_slicechunktosize(revlog, [1, 3], 3))
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235 [[1], [3]]
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236 >>> list(_slicechunktosize(revlog, [1, 2, 3], 3))
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237 [[1], [2, 3]]
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238 >>> list(_slicechunktosize(revlog, [3, 5], 3))
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239 [[3], [5]]
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240 >>> list(_slicechunktosize(revlog, [3, 4, 5], 3))
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241 [[3], [4, 5]]
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242 >>> list(_slicechunktosize(revlog, [5, 6, 7, 8], 3))
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243 [[5], [6, 7, 8]]
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244 >>> list(_slicechunktosize(revlog, [0, 1, 2, 3, 4, 5, 6, 7, 8], 3))
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245 [[0], [1, 2], [3], [5], [6, 7, 8]]
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246
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247 Case with too large individual chunk (must return valid chunk)
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248 >>> list(_slicechunktosize(revlog, [0, 1], 2))
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249 [[0], [1]]
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250 >>> list(_slicechunktosize(revlog, [1, 3], 1))
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251 [[1], [3]]
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252 >>> list(_slicechunktosize(revlog, [3, 4, 5], 2))
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253 [[3], [5]]
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254
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255 == mixed case ==
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256 >>> revlog = _testrevlog(data, snapshot=[0, 1, 2])
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257 >>> list(_slicechunktosize(revlog, list(range(9)), 5))
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258 [[0, 1], [2], [3, 4, 5], [6, 7, 8]]
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259 """
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260 assert targetsize is None or 0 <= targetsize
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261 startdata = revlog.start(revs[0])
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262 enddata = revlog.end(revs[-1])
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263 fullspan = enddata - startdata
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264 if targetsize is None or fullspan <= targetsize:
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265 yield revs
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diff changeset
266 return
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267
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diff changeset
268 startrevidx = 0
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269 endrevidx = 1
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270 iterrevs = enumerate(revs)
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271 next(iterrevs) # skip first rev.
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272 # first step: get snapshots out of the way
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273 for idx, r in iterrevs:
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274 span = revlog.end(r) - startdata
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275 snapshot = revlog.issnapshot(r)
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276 if span <= targetsize and snapshot:
40657
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277 endrevidx = idx + 1
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diff changeset
278 else:
40657
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279 chunk = _trimchunk(revlog, revs, startrevidx, endrevidx)
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280 if chunk:
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281 yield chunk
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282 startrevidx = idx
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283 startdata = revlog.start(r)
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284 endrevidx = idx + 1
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285 if not snapshot:
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286 break
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287
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288 # for the others, we use binary slicing to quickly converge toward valid
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289 # chunks (otherwise, we might end up looking for start/end of many
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290 # revisions). This logic is not looking for the perfect slicing point, it
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit
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291 # focuses on quickly converging toward valid chunks.
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292 nbitem = len(revs)
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293 while (enddata - startdata) > targetsize:
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294 endrevidx = nbitem
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295 if nbitem - startrevidx <= 1:
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296 break # protect against individual chunk larger than limit
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297 localenddata = revlog.end(revs[endrevidx - 1])
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298 span = localenddata - startdata
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299 while span > targetsize:
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300 if endrevidx - startrevidx <= 1:
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301 break # protect against individual chunk larger than limit
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302 endrevidx -= (endrevidx - startrevidx) // 2
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303 localenddata = revlog.end(revs[endrevidx - 1])
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304 span = localenddata - startdata
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305 chunk = _trimchunk(revlog, revs, startrevidx, endrevidx)
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diff changeset
306 if chunk:
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diff changeset
307 yield chunk
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Boris Feld <boris.feld@octobus.net>
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308 startrevidx = endrevidx
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diff changeset
309 startdata = revlog.start(revs[startrevidx])
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310
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311 chunk = _trimchunk(revlog, revs, startrevidx)
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diff changeset
312 if chunk:
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313 yield chunk
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314
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315
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diff changeset
316 def _slicechunktodensity(revlog, revs, targetdensity=0.5, mingapsize=0):
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diff changeset
317 """slice revs to reduce the amount of unrelated data to be read from disk.
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318
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319 ``revs`` is sliced into groups that should be read in one time.
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320 Assume that revs are sorted.
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321
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322 The initial chunk is sliced until the overall density (payload/chunks-span
feba6be0941b revlog: extract density based slicing into its own function
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diff changeset
323 ratio) is above `targetdensity`. No gap smaller than `mingapsize` is
feba6be0941b revlog: extract density based slicing into its own function
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diff changeset
324 skipped.
feba6be0941b revlog: extract density based slicing into its own function
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diff changeset
325
feba6be0941b revlog: extract density based slicing into its own function
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326 >>> revlog = _testrevlog([
feba6be0941b revlog: extract density based slicing into its own function
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diff changeset
327 ... 5, #00 (5)
feba6be0941b revlog: extract density based slicing into its own function
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diff changeset
328 ... 10, #01 (5)
feba6be0941b revlog: extract density based slicing into its own function
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diff changeset
329 ... 12, #02 (2)
feba6be0941b revlog: extract density based slicing into its own function
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diff changeset
330 ... 12, #03 (empty)
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331 ... 27, #04 (15)
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diff changeset
332 ... 31, #05 (4)
feba6be0941b revlog: extract density based slicing into its own function
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diff changeset
333 ... 31, #06 (empty)
feba6be0941b revlog: extract density based slicing into its own function
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diff changeset
334 ... 42, #07 (11)
feba6be0941b revlog: extract density based slicing into its own function
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diff changeset
335 ... 47, #08 (5)
feba6be0941b revlog: extract density based slicing into its own function
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diff changeset
336 ... 47, #09 (empty)
feba6be0941b revlog: extract density based slicing into its own function
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diff changeset
337 ... 48, #10 (1)
feba6be0941b revlog: extract density based slicing into its own function
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diff changeset
338 ... 51, #11 (3)
feba6be0941b revlog: extract density based slicing into its own function
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diff changeset
339 ... 74, #12 (23)
feba6be0941b revlog: extract density based slicing into its own function
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diff changeset
340 ... 85, #13 (11)
feba6be0941b revlog: extract density based slicing into its own function
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diff changeset
341 ... 86, #14 (1)
feba6be0941b revlog: extract density based slicing into its own function
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parents: 38640
diff changeset
342 ... 91, #15 (5)
feba6be0941b revlog: extract density based slicing into its own function
Boris Feld <boris.feld@octobus.net>
parents: 38640
diff changeset
343 ... ])
feba6be0941b revlog: extract density based slicing into its own function
Boris Feld <boris.feld@octobus.net>
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diff changeset
344
38655
cd1c484e31e8 revlog: adjust doctest examples to be portable to Python 3
Augie Fackler <augie@google.com>
parents: 38644
diff changeset
345 >>> list(_slicechunktodensity(revlog, list(range(16))))
38641
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parents: 38640
diff changeset
346 [[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]]
feba6be0941b revlog: extract density based slicing into its own function
Boris Feld <boris.feld@octobus.net>
parents: 38640
diff changeset
347 >>> list(_slicechunktodensity(revlog, [0, 15]))
feba6be0941b revlog: extract density based slicing into its own function
Boris Feld <boris.feld@octobus.net>
parents: 38640
diff changeset
348 [[0], [15]]
feba6be0941b revlog: extract density based slicing into its own function
Boris Feld <boris.feld@octobus.net>
parents: 38640
diff changeset
349 >>> list(_slicechunktodensity(revlog, [0, 11, 15]))
feba6be0941b revlog: extract density based slicing into its own function
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parents: 38640
diff changeset
350 [[0], [11], [15]]
feba6be0941b revlog: extract density based slicing into its own function
Boris Feld <boris.feld@octobus.net>
parents: 38640
diff changeset
351 >>> list(_slicechunktodensity(revlog, [0, 11, 13, 15]))
feba6be0941b revlog: extract density based slicing into its own function
Boris Feld <boris.feld@octobus.net>
parents: 38640
diff changeset
352 [[0], [11, 13, 15]]
feba6be0941b revlog: extract density based slicing into its own function
Boris Feld <boris.feld@octobus.net>
parents: 38640
diff changeset
353 >>> list(_slicechunktodensity(revlog, [1, 2, 3, 5, 8, 10, 11, 14]))
feba6be0941b revlog: extract density based slicing into its own function
Boris Feld <boris.feld@octobus.net>
parents: 38640
diff changeset
354 [[1, 2], [5, 8, 10, 11], [14]]
feba6be0941b revlog: extract density based slicing into its own function
Boris Feld <boris.feld@octobus.net>
parents: 38640
diff changeset
355 >>> list(_slicechunktodensity(revlog, [1, 2, 3, 5, 8, 10, 11, 14],
feba6be0941b revlog: extract density based slicing into its own function
Boris Feld <boris.feld@octobus.net>
parents: 38640
diff changeset
356 ... mingapsize=20))
feba6be0941b revlog: extract density based slicing into its own function
Boris Feld <boris.feld@octobus.net>
parents: 38640
diff changeset
357 [[1, 2, 3, 5, 8, 10, 11], [14]]
feba6be0941b revlog: extract density based slicing into its own function
Boris Feld <boris.feld@octobus.net>
parents: 38640
diff changeset
358 >>> list(_slicechunktodensity(revlog, [1, 2, 3, 5, 8, 10, 11, 14],
feba6be0941b revlog: extract density based slicing into its own function
Boris Feld <boris.feld@octobus.net>
parents: 38640
diff changeset
359 ... targetdensity=0.95))
feba6be0941b revlog: extract density based slicing into its own function
Boris Feld <boris.feld@octobus.net>
parents: 38640
diff changeset
360 [[1, 2], [5], [8, 10, 11], [14]]
feba6be0941b revlog: extract density based slicing into its own function
Boris Feld <boris.feld@octobus.net>
parents: 38640
diff changeset
361 >>> list(_slicechunktodensity(revlog, [1, 2, 3, 5, 8, 10, 11, 14],
feba6be0941b revlog: extract density based slicing into its own function
Boris Feld <boris.feld@octobus.net>
parents: 38640
diff changeset
362 ... targetdensity=0.95, mingapsize=12))
feba6be0941b revlog: extract density based slicing into its own function
Boris Feld <boris.feld@octobus.net>
parents: 38640
diff changeset
363 [[1, 2], [5, 8, 10, 11], [14]]
feba6be0941b revlog: extract density based slicing into its own function
Boris Feld <boris.feld@octobus.net>
parents: 38640
diff changeset
364 """
34824
e2ad93bcc084 revlog: introduce an experimental flag to slice chunks reads when too sparse
Paul Morelle <paul.morelle@octobus.net>
parents: 34823
diff changeset
365 start = revlog.start
e2ad93bcc084 revlog: introduce an experimental flag to slice chunks reads when too sparse
Paul Morelle <paul.morelle@octobus.net>
parents: 34823
diff changeset
366 length = revlog.length
e2ad93bcc084 revlog: introduce an experimental flag to slice chunks reads when too sparse
Paul Morelle <paul.morelle@octobus.net>
parents: 34823
diff changeset
367
34880
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one
Boris Feld <boris.feld@octobus.net>
parents: 34825
diff changeset
368 if len(revs) <= 1:
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one
Boris Feld <boris.feld@octobus.net>
parents: 34825
diff changeset
369 yield revs
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one
Boris Feld <boris.feld@octobus.net>
parents: 34825
diff changeset
370 return
34824
e2ad93bcc084 revlog: introduce an experimental flag to slice chunks reads when too sparse
Paul Morelle <paul.morelle@octobus.net>
parents: 34823
diff changeset
371
40604
3ac23dad6364 sparse-revlog: drop unused deltainfo parameter from _slicechunktodensity
Boris Feld <boris.feld@octobus.net>
parents: 40603
diff changeset
372 deltachainspan = segmentspan(revlog, revs)
34880
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one
Boris Feld <boris.feld@octobus.net>
parents: 34825
diff changeset
373
38641
feba6be0941b revlog: extract density based slicing into its own function
Boris Feld <boris.feld@octobus.net>
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diff changeset
374 if deltachainspan < mingapsize:
38635
d083ae26c325 revlog: early return in _slicechunk when span is already small enough
Boris Feld <boris.feld@octobus.net>
parents: 38634
diff changeset
375 yield revs
d083ae26c325 revlog: early return in _slicechunk when span is already small enough
Boris Feld <boris.feld@octobus.net>
parents: 38634
diff changeset
376 return
d083ae26c325 revlog: early return in _slicechunk when span is already small enough
Boris Feld <boris.feld@octobus.net>
parents: 38634
diff changeset
377
38718
f8762ea73e0d sparse-revlog: implement algorithm to write sparse delta chains (issue5480)
Paul Morelle <paul.morelle@octobus.net>
parents: 38717
diff changeset
378 readdata = deltachainspan
40606
bfbfd15d65bd sparse-revlog: fast-path before computing payload size
Boris Feld <boris.feld@octobus.net>
parents: 40605
diff changeset
379 chainpayload = sum(length(r) for r in revs)
34824
e2ad93bcc084 revlog: introduce an experimental flag to slice chunks reads when too sparse
Paul Morelle <paul.morelle@octobus.net>
parents: 34823
diff changeset
380
34880
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one
Boris Feld <boris.feld@octobus.net>
parents: 34825
diff changeset
381 if deltachainspan:
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one
Boris Feld <boris.feld@octobus.net>
parents: 34825
diff changeset
382 density = chainpayload / float(deltachainspan)
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one
Boris Feld <boris.feld@octobus.net>
parents: 34825
diff changeset
383 else:
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one
Boris Feld <boris.feld@octobus.net>
parents: 34825
diff changeset
384 density = 1.0
34824
e2ad93bcc084 revlog: introduce an experimental flag to slice chunks reads when too sparse
Paul Morelle <paul.morelle@octobus.net>
parents: 34823
diff changeset
385
38641
feba6be0941b revlog: extract density based slicing into its own function
Boris Feld <boris.feld@octobus.net>
parents: 38640
diff changeset
386 if density >= targetdensity:
38634
f0ea8b847831 revlog: early return in _slicechunk when density is already good
Paul Morelle <paul.morelle@octobus.net>
parents: 38632
diff changeset
387 yield revs
f0ea8b847831 revlog: early return in _slicechunk when density is already good
Paul Morelle <paul.morelle@octobus.net>
parents: 38632
diff changeset
388 return
f0ea8b847831 revlog: early return in _slicechunk when density is already good
Paul Morelle <paul.morelle@octobus.net>
parents: 38632
diff changeset
389
34880
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one
Boris Feld <boris.feld@octobus.net>
parents: 34825
diff changeset
390 # Store the gaps in a heap to have them sorted by decreasing size
40607
54de23400b2a sparse-revlog: stop using a heap to track gaps
Boris Feld <boris.feld@octobus.net>
parents: 40606
diff changeset
391 gaps = []
34880
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one
Boris Feld <boris.feld@octobus.net>
parents: 34825
diff changeset
392 prevend = None
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one
Boris Feld <boris.feld@octobus.net>
parents: 34825
diff changeset
393 for i, rev in enumerate(revs):
40604
3ac23dad6364 sparse-revlog: drop unused deltainfo parameter from _slicechunktodensity
Boris Feld <boris.feld@octobus.net>
parents: 40603
diff changeset
394 revstart = start(rev)
3ac23dad6364 sparse-revlog: drop unused deltainfo parameter from _slicechunktodensity
Boris Feld <boris.feld@octobus.net>
parents: 40603
diff changeset
395 revlen = length(rev)
34824
e2ad93bcc084 revlog: introduce an experimental flag to slice chunks reads when too sparse
Paul Morelle <paul.morelle@octobus.net>
parents: 34823
diff changeset
396
34898
1bde8e8e5de0 sparse-read: ignore trailing empty revs in each read chunk
Paul Morelle <paul.morelle@octobus.net>
parents: 34881
diff changeset
397 # Skip empty revisions to form larger holes
1bde8e8e5de0 sparse-read: ignore trailing empty revs in each read chunk
Paul Morelle <paul.morelle@octobus.net>
parents: 34881
diff changeset
398 if revlen == 0:
1bde8e8e5de0 sparse-read: ignore trailing empty revs in each read chunk
Paul Morelle <paul.morelle@octobus.net>
parents: 34881
diff changeset
399 continue
1bde8e8e5de0 sparse-read: ignore trailing empty revs in each read chunk
Paul Morelle <paul.morelle@octobus.net>
parents: 34881
diff changeset
400
34880
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one
Boris Feld <boris.feld@octobus.net>
parents: 34825
diff changeset
401 if prevend is not None:
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one
Boris Feld <boris.feld@octobus.net>
parents: 34825
diff changeset
402 gapsize = revstart - prevend
34881
8c9b08a0c48c sparse-read: skip gaps too small to be worth splitting
Paul Morelle <paul.morelle@octobus.net>
parents: 34880
diff changeset
403 # only consider holes that are large enough
38641
feba6be0941b revlog: extract density based slicing into its own function
Boris Feld <boris.feld@octobus.net>
parents: 38640
diff changeset
404 if gapsize > mingapsize:
40607
54de23400b2a sparse-revlog: stop using a heap to track gaps
Boris Feld <boris.feld@octobus.net>
parents: 40606
diff changeset
405 gaps.append((gapsize, i))
34880
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one
Boris Feld <boris.feld@octobus.net>
parents: 34825
diff changeset
406
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one
Boris Feld <boris.feld@octobus.net>
parents: 34825
diff changeset
407 prevend = revstart + revlen
40607
54de23400b2a sparse-revlog: stop using a heap to track gaps
Boris Feld <boris.feld@octobus.net>
parents: 40606
diff changeset
408 # sort the gaps to pop them from largest to small
54de23400b2a sparse-revlog: stop using a heap to track gaps
Boris Feld <boris.feld@octobus.net>
parents: 40606
diff changeset
409 gaps.sort()
34880
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one
Boris Feld <boris.feld@octobus.net>
parents: 34825
diff changeset
410
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one
Boris Feld <boris.feld@octobus.net>
parents: 34825
diff changeset
411 # Collect the indices of the largest holes until the density is acceptable
40608
526ee887c4d5 sparse-revlog: stop using a heap to track selected gap
Boris Feld <boris.feld@octobus.net>
parents: 40607
diff changeset
412 selected = []
40607
54de23400b2a sparse-revlog: stop using a heap to track gaps
Boris Feld <boris.feld@octobus.net>
parents: 40606
diff changeset
413 while gaps and density < targetdensity:
54de23400b2a sparse-revlog: stop using a heap to track gaps
Boris Feld <boris.feld@octobus.net>
parents: 40606
diff changeset
414 gapsize, gapidx = gaps.pop()
34880
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one
Boris Feld <boris.feld@octobus.net>
parents: 34825
diff changeset
415
40608
526ee887c4d5 sparse-revlog: stop using a heap to track selected gap
Boris Feld <boris.feld@octobus.net>
parents: 40607
diff changeset
416 selected.append(gapidx)
34824
e2ad93bcc084 revlog: introduce an experimental flag to slice chunks reads when too sparse
Paul Morelle <paul.morelle@octobus.net>
parents: 34823
diff changeset
417
34880
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one
Boris Feld <boris.feld@octobus.net>
parents: 34825
diff changeset
418 # the gap sizes are stored as negatives to be sorted decreasingly
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one
Boris Feld <boris.feld@octobus.net>
parents: 34825
diff changeset
419 # by the heap
40607
54de23400b2a sparse-revlog: stop using a heap to track gaps
Boris Feld <boris.feld@octobus.net>
parents: 40606
diff changeset
420 readdata -= gapsize
34880
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one
Boris Feld <boris.feld@octobus.net>
parents: 34825
diff changeset
421 if readdata > 0:
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one
Boris Feld <boris.feld@octobus.net>
parents: 34825
diff changeset
422 density = chainpayload / float(readdata)
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one
Boris Feld <boris.feld@octobus.net>
parents: 34825
diff changeset
423 else:
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one
Boris Feld <boris.feld@octobus.net>
parents: 34825
diff changeset
424 density = 1.0
40608
526ee887c4d5 sparse-revlog: stop using a heap to track selected gap
Boris Feld <boris.feld@octobus.net>
parents: 40607
diff changeset
425 selected.sort()
34824
e2ad93bcc084 revlog: introduce an experimental flag to slice chunks reads when too sparse
Paul Morelle <paul.morelle@octobus.net>
parents: 34823
diff changeset
426
34880
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one
Boris Feld <boris.feld@octobus.net>
parents: 34825
diff changeset
427 # Cut the revs at collected indices
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one
Boris Feld <boris.feld@octobus.net>
parents: 34825
diff changeset
428 previdx = 0
40608
526ee887c4d5 sparse-revlog: stop using a heap to track selected gap
Boris Feld <boris.feld@octobus.net>
parents: 40607
diff changeset
429 for idx in selected:
34898
1bde8e8e5de0 sparse-read: ignore trailing empty revs in each read chunk
Paul Morelle <paul.morelle@octobus.net>
parents: 34881
diff changeset
430
1bde8e8e5de0 sparse-read: ignore trailing empty revs in each read chunk
Paul Morelle <paul.morelle@octobus.net>
parents: 34881
diff changeset
431 chunk = _trimchunk(revlog, revs, previdx, idx)
1bde8e8e5de0 sparse-read: ignore trailing empty revs in each read chunk
Paul Morelle <paul.morelle@octobus.net>
parents: 34881
diff changeset
432 if chunk:
1bde8e8e5de0 sparse-read: ignore trailing empty revs in each read chunk
Paul Morelle <paul.morelle@octobus.net>
parents: 34881
diff changeset
433 yield chunk
1bde8e8e5de0 sparse-read: ignore trailing empty revs in each read chunk
Paul Morelle <paul.morelle@octobus.net>
parents: 34881
diff changeset
434
34880
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one
Boris Feld <boris.feld@octobus.net>
parents: 34825
diff changeset
435 previdx = idx
34898
1bde8e8e5de0 sparse-read: ignore trailing empty revs in each read chunk
Paul Morelle <paul.morelle@octobus.net>
parents: 34881
diff changeset
436
1bde8e8e5de0 sparse-read: ignore trailing empty revs in each read chunk
Paul Morelle <paul.morelle@octobus.net>
parents: 34881
diff changeset
437 chunk = _trimchunk(revlog, revs, previdx)
1bde8e8e5de0 sparse-read: ignore trailing empty revs in each read chunk
Paul Morelle <paul.morelle@octobus.net>
parents: 34881
diff changeset
438 if chunk:
1bde8e8e5de0 sparse-read: ignore trailing empty revs in each read chunk
Paul Morelle <paul.morelle@octobus.net>
parents: 34881
diff changeset
439 yield chunk
34824
e2ad93bcc084 revlog: introduce an experimental flag to slice chunks reads when too sparse
Paul Morelle <paul.morelle@octobus.net>
parents: 34823
diff changeset
440
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
441
39330
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
442 def _trimchunk(revlog, revs, startidx, endidx=None):
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
443 """returns revs[startidx:endidx] without empty trailing revs
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
444
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
445 Doctest Setup
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
446 >>> revlog = _testrevlog([
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
447 ... 5, #0
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
448 ... 10, #1
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
449 ... 12, #2
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
450 ... 12, #3 (empty)
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
451 ... 17, #4
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
452 ... 21, #5
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
453 ... 21, #6 (empty)
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
454 ... ])
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
455
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
456 Contiguous cases:
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
457 >>> _trimchunk(revlog, [0, 1, 2, 3, 4, 5, 6], 0)
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
458 [0, 1, 2, 3, 4, 5]
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
459 >>> _trimchunk(revlog, [0, 1, 2, 3, 4, 5, 6], 0, 5)
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
460 [0, 1, 2, 3, 4]
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
461 >>> _trimchunk(revlog, [0, 1, 2, 3, 4, 5, 6], 0, 4)
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
462 [0, 1, 2]
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
463 >>> _trimchunk(revlog, [0, 1, 2, 3, 4, 5, 6], 2, 4)
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
464 [2]
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
465 >>> _trimchunk(revlog, [0, 1, 2, 3, 4, 5, 6], 3)
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
466 [3, 4, 5]
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
467 >>> _trimchunk(revlog, [0, 1, 2, 3, 4, 5, 6], 3, 5)
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
468 [3, 4]
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
469
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
470 Discontiguous cases:
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
471 >>> _trimchunk(revlog, [1, 3, 5, 6], 0)
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
472 [1, 3, 5]
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
473 >>> _trimchunk(revlog, [1, 3, 5, 6], 0, 2)
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
474 [1]
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
475 >>> _trimchunk(revlog, [1, 3, 5, 6], 1, 3)
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
476 [3, 5]
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
477 >>> _trimchunk(revlog, [1, 3, 5, 6], 1)
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
478 [3, 5]
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
479 """
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
480 length = revlog.length
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
481
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
482 if endidx is None:
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
483 endidx = len(revs)
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
484
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
485 # If we have a non-emtpy delta candidate, there are nothing to trim
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
486 if revs[endidx - 1] < len(revlog):
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
487 # Trim empty revs at the end, except the very first revision of a chain
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
488 while (
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
489 endidx > 1 and endidx > startidx and length(revs[endidx - 1]) == 0
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
490 ):
39330
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
491 endidx -= 1
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
492
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
493 return revs[startidx:endidx]
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
494
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
495
40605
a32ccd32982b sparse-revlog: drop unused deltainfo parameter from segmentspan
Boris Feld <boris.feld@octobus.net>
parents: 40604
diff changeset
496 def segmentspan(revlog, revs):
39330
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
497 """Get the byte span of a segment of revisions
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
498
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
499 revs is a sorted array of revision numbers
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
500
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
501 >>> revlog = _testrevlog([
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
502 ... 5, #0
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
503 ... 10, #1
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
504 ... 12, #2
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
505 ... 12, #3 (empty)
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
506 ... 17, #4
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
507 ... ])
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
508
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
509 >>> segmentspan(revlog, [0, 1, 2, 3, 4])
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
510 17
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
511 >>> segmentspan(revlog, [0, 4])
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
512 17
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
513 >>> segmentspan(revlog, [3, 4])
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
514 5
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
515 >>> segmentspan(revlog, [1, 2, 3,])
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
516 7
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
517 >>> segmentspan(revlog, [1, 3])
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
518 7
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
519 """
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
520 if not revs:
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
521 return 0
40605
a32ccd32982b sparse-revlog: drop unused deltainfo parameter from segmentspan
Boris Feld <boris.feld@octobus.net>
parents: 40604
diff changeset
522 end = revlog.end(revs[-1])
39330
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
523 return end - revlog.start(revs[0])
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
524
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
525
51020
509f0f7fc89e delta-computer: stop explicitly taking file handle
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50929
diff changeset
526 def _textfromdelta(revlog, baserev, delta, p1, p2, flags, expectednode):
39331
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function
Boris Feld <boris.feld@octobus.net>
parents: 39330
diff changeset
527 """build full text from a (base, delta) pair and other metadata"""
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function
Boris Feld <boris.feld@octobus.net>
parents: 39330
diff changeset
528 # special case deltas which replace entire base; no need to decode
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function
Boris Feld <boris.feld@octobus.net>
parents: 39330
diff changeset
529 # base revision. this neatly avoids censored bases, which throw when
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function
Boris Feld <boris.feld@octobus.net>
parents: 39330
diff changeset
530 # they're decoded.
43077
687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents: 43076
diff changeset
531 hlen = struct.calcsize(b">lll")
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
532 if delta[:hlen] == mdiff.replacediffheader(
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
533 revlog.rawsize(baserev), len(delta) - hlen
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
534 ):
39331
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function
Boris Feld <boris.feld@octobus.net>
parents: 39330
diff changeset
535 fulltext = delta[hlen:]
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function
Boris Feld <boris.feld@octobus.net>
parents: 39330
diff changeset
536 else:
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function
Boris Feld <boris.feld@octobus.net>
parents: 39330
diff changeset
537 # deltabase is rawtext before changed by flag processors, which is
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function
Boris Feld <boris.feld@octobus.net>
parents: 39330
diff changeset
538 # equivalent to non-raw text
51020
509f0f7fc89e delta-computer: stop explicitly taking file handle
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50929
diff changeset
539 basetext = revlog.revision(baserev)
39331
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function
Boris Feld <boris.feld@octobus.net>
parents: 39330
diff changeset
540 fulltext = mdiff.patch(basetext, delta)
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function
Boris Feld <boris.feld@octobus.net>
parents: 39330
diff changeset
541
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function
Boris Feld <boris.feld@octobus.net>
parents: 39330
diff changeset
542 try:
42992
dff95420480f flagprocessors: make `processflagsraw` a module level function
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 42878
diff changeset
543 validatehash = flagutil.processflagsraw(revlog, fulltext, flags)
39331
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function
Boris Feld <boris.feld@octobus.net>
parents: 39330
diff changeset
544 if validatehash:
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function
Boris Feld <boris.feld@octobus.net>
parents: 39330
diff changeset
545 revlog.checkhash(fulltext, expectednode, p1=p1, p2=p2)
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function
Boris Feld <boris.feld@octobus.net>
parents: 39330
diff changeset
546 if flags & REVIDX_ISCENSORED:
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
547 raise error.StorageError(
43077
687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents: 43076
diff changeset
548 _(b'node %s is not censored') % expectednode
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
549 )
39774
4a2466b2a434 revlog: drop some more error aliases (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39773
diff changeset
550 except error.CensoredNodeError:
39331
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function
Boris Feld <boris.feld@octobus.net>
parents: 39330
diff changeset
551 # must pass the censored index flag to add censored revisions
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function
Boris Feld <boris.feld@octobus.net>
parents: 39330
diff changeset
552 if not flags & REVIDX_ISCENSORED:
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function
Boris Feld <boris.feld@octobus.net>
parents: 39330
diff changeset
553 raise
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function
Boris Feld <boris.feld@octobus.net>
parents: 39330
diff changeset
554 return fulltext
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function
Boris Feld <boris.feld@octobus.net>
parents: 39330
diff changeset
555
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
556
35638
edc9330acac1 revlog: introduce 'deltainfo' to distinguish from 'delta'
Paul Morelle <paul.morelle@octobus.net>
parents: 35637
diff changeset
557 @attr.s(slots=True, frozen=True)
48946
642e31cb55f0 py3: use class X: instead of class X(object):
Gregory Szorc <gregory.szorc@gmail.com>
parents: 48875
diff changeset
558 class _deltainfo:
35638
edc9330acac1 revlog: introduce 'deltainfo' to distinguish from 'delta'
Paul Morelle <paul.morelle@octobus.net>
parents: 35637
diff changeset
559 distance = attr.ib()
edc9330acac1 revlog: introduce 'deltainfo' to distinguish from 'delta'
Paul Morelle <paul.morelle@octobus.net>
parents: 35637
diff changeset
560 deltalen = attr.ib()
edc9330acac1 revlog: introduce 'deltainfo' to distinguish from 'delta'
Paul Morelle <paul.morelle@octobus.net>
parents: 35637
diff changeset
561 data = attr.ib()
edc9330acac1 revlog: introduce 'deltainfo' to distinguish from 'delta'
Paul Morelle <paul.morelle@octobus.net>
parents: 35637
diff changeset
562 base = attr.ib()
edc9330acac1 revlog: introduce 'deltainfo' to distinguish from 'delta'
Paul Morelle <paul.morelle@octobus.net>
parents: 35637
diff changeset
563 chainbase = attr.ib()
edc9330acac1 revlog: introduce 'deltainfo' to distinguish from 'delta'
Paul Morelle <paul.morelle@octobus.net>
parents: 35637
diff changeset
564 chainlen = attr.ib()
edc9330acac1 revlog: introduce 'deltainfo' to distinguish from 'delta'
Paul Morelle <paul.morelle@octobus.net>
parents: 35637
diff changeset
565 compresseddeltalen = attr.ib()
39154
e0da43e2f71f revlog: compute snapshot depth on delta info
Boris Feld <boris.feld@octobus.net>
parents: 39152
diff changeset
566 snapshotdepth = attr.ib()
35638
edc9330acac1 revlog: introduce 'deltainfo' to distinguish from 'delta'
Paul Morelle <paul.morelle@octobus.net>
parents: 35637
diff changeset
567
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
568
47253
b876f0bf7366 revlog: introduce a plain compression mode
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 46819
diff changeset
569 def drop_u_compression(delta):
b876f0bf7366 revlog: introduce a plain compression mode
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 46819
diff changeset
570 """turn into a "u" (no-compression) into no-compression without header
b876f0bf7366 revlog: introduce a plain compression mode
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 46819
diff changeset
571
b876f0bf7366 revlog: introduce a plain compression mode
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 46819
diff changeset
572 This is useful for revlog format that has better compression method.
b876f0bf7366 revlog: introduce a plain compression mode
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 46819
diff changeset
573 """
b876f0bf7366 revlog: introduce a plain compression mode
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 46819
diff changeset
574 assert delta.data[0] == b'u', delta.data[0]
b876f0bf7366 revlog: introduce a plain compression mode
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 46819
diff changeset
575 return _deltainfo(
b876f0bf7366 revlog: introduce a plain compression mode
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 46819
diff changeset
576 delta.distance,
b876f0bf7366 revlog: introduce a plain compression mode
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 46819
diff changeset
577 delta.deltalen - 1,
b876f0bf7366 revlog: introduce a plain compression mode
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 46819
diff changeset
578 (b'', delta.data[1]),
b876f0bf7366 revlog: introduce a plain compression mode
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 46819
diff changeset
579 delta.base,
b876f0bf7366 revlog: introduce a plain compression mode
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 46819
diff changeset
580 delta.chainbase,
b876f0bf7366 revlog: introduce a plain compression mode
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 46819
diff changeset
581 delta.chainlen,
b876f0bf7366 revlog: introduce a plain compression mode
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 46819
diff changeset
582 delta.compresseddeltalen,
b876f0bf7366 revlog: introduce a plain compression mode
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 46819
diff changeset
583 delta.snapshotdepth,
b876f0bf7366 revlog: introduce a plain compression mode
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 46819
diff changeset
584 )
b876f0bf7366 revlog: introduce a plain compression mode
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 46819
diff changeset
585
b876f0bf7366 revlog: introduce a plain compression mode
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 46819
diff changeset
586
49674
5af4a0a73e4c find-delta: rename _isgooddeltainfo
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49657
diff changeset
587 def is_good_delta_info(revlog, deltainfo, revinfo):
39330
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
588 """Returns True if the given delta is good. Good means that it is within
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
589 the disk span, disk size, and chain length bounds that we know to be
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
590 performant."""
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
591 if deltainfo is None:
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
592 return False
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
593
50698
f1b57672cb94 delta-find: remove dead code intended to deal with forced delta reuse
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50686
diff changeset
594 # the DELTA_BASE_REUSE_FORCE case should have been taken care of sooner so
f1b57672cb94 delta-find: remove dead code intended to deal with forced delta reuse
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50686
diff changeset
595 # we should never end up asking such question. Adding the assert as a
f1b57672cb94 delta-find: remove dead code intended to deal with forced delta reuse
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50686
diff changeset
596 # safe-guard to detect anything that would be fishy in this regard.
f1b57672cb94 delta-find: remove dead code intended to deal with forced delta reuse
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50686
diff changeset
597 assert (
f1b57672cb94 delta-find: remove dead code intended to deal with forced delta reuse
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50686
diff changeset
598 revinfo.cachedelta is None
f1b57672cb94 delta-find: remove dead code intended to deal with forced delta reuse
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50686
diff changeset
599 or revinfo.cachedelta[2] != DELTA_BASE_REUSE_FORCE
51046
f636103c4d67 revlog: remove legacy usage of `_generaldelta`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 51045
diff changeset
600 or not revlog.delta_config.general_delta
50698
f1b57672cb94 delta-find: remove dead code intended to deal with forced delta reuse
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50686
diff changeset
601 )
49768
bcae90c53def delta-find: add a delta-reuse policy that blindly accepts incoming deltas
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49681
diff changeset
602
39330
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
603 # - 'deltainfo.distance' is the distance from the base revision --
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
604 # bounding it limits the amount of I/O we need to do.
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
605 # - 'deltainfo.compresseddeltalen' is the sum of the total size of
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
606 # deltas we need to apply -- bounding it limits the amount of CPU
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
607 # we consume.
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
608
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
609 textlen = revinfo.textlen
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
610 defaultmax = textlen * 4
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
611 maxdist = revlog._maxdeltachainspan
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
612 if not maxdist:
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
613 maxdist = deltainfo.distance # ensure the conditional pass
39330
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
614 maxdist = max(maxdist, defaultmax)
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
615
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
616 # Bad delta from read span:
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
617 #
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
618 # If the span of data read is larger than the maximum allowed.
40603
2f7e531ef3e7 sparse-revlog: skip the span check in the sparse-revlog case
Boris Feld <boris.feld@octobus.net>
parents: 40451
diff changeset
619 #
2f7e531ef3e7 sparse-revlog: skip the span check in the sparse-revlog case
Boris Feld <boris.feld@octobus.net>
parents: 40451
diff changeset
620 # In the sparse-revlog case, we rely on the associated "sparse reading"
2f7e531ef3e7 sparse-revlog: skip the span check in the sparse-revlog case
Boris Feld <boris.feld@octobus.net>
parents: 40451
diff changeset
621 # to avoid issue related to the span of data. In theory, it would be
2f7e531ef3e7 sparse-revlog: skip the span check in the sparse-revlog case
Boris Feld <boris.feld@octobus.net>
parents: 40451
diff changeset
622 # possible to build pathological revlog where delta pattern would lead
2f7e531ef3e7 sparse-revlog: skip the span check in the sparse-revlog case
Boris Feld <boris.feld@octobus.net>
parents: 40451
diff changeset
623 # to too many reads. However, they do not happen in practice at all. So
2f7e531ef3e7 sparse-revlog: skip the span check in the sparse-revlog case
Boris Feld <boris.feld@octobus.net>
parents: 40451
diff changeset
624 # we skip the span check entirely.
2f7e531ef3e7 sparse-revlog: skip the span check in the sparse-revlog case
Boris Feld <boris.feld@octobus.net>
parents: 40451
diff changeset
625 if not revlog._sparserevlog and maxdist < deltainfo.distance:
39330
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
626 return False
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
627
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
628 # Bad delta from new delta size:
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
629 #
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
630 # If the delta size is larger than the target text, storing the
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
631 # delta will be inefficient.
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
632 if textlen < deltainfo.deltalen:
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
633 return False
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
634
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
635 # Bad delta from cumulated payload size:
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
636 #
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
637 # If the sum of delta get larger than K * target text length.
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
638 if textlen * LIMIT_DELTA2TEXT < deltainfo.compresseddeltalen:
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
639 return False
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
640
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
641 # Bad delta from chain length:
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
642 #
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
643 # If the number of delta in the chain gets too high.
51052
e80e2d614c9d revlog: remove legacy usage of `_maxchainlen`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 51046
diff changeset
644 if (
e80e2d614c9d revlog: remove legacy usage of `_maxchainlen`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 51046
diff changeset
645 revlog.delta_config.max_chain_len
e80e2d614c9d revlog: remove legacy usage of `_maxchainlen`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 51046
diff changeset
646 and revlog.delta_config.max_chain_len < deltainfo.chainlen
e80e2d614c9d revlog: remove legacy usage of `_maxchainlen`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 51046
diff changeset
647 ):
39330
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
648 return False
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
649
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
650 # bad delta from intermediate snapshot size limit
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
651 #
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
652 # If an intermediate snapshot size is higher than the limit. The
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
653 # limit exist to prevent endless chain of intermediate delta to be
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
654 # created.
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
655 if (
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
656 deltainfo.snapshotdepth is not None
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
657 and (textlen >> deltainfo.snapshotdepth) < deltainfo.deltalen
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
658 ):
39330
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
659 return False
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
660
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
661 # bad delta if new intermediate snapshot is larger than the previous
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
662 # snapshot
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
663 if (
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
664 deltainfo.snapshotdepth
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
665 and revlog.length(deltainfo.base) < deltainfo.deltalen
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
666 ):
39330
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
667 return False
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
668
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
669 return True
655b5b465953 revlog: split functionality related to deltas computation in a new module
Boris Feld <boris.feld@octobus.net>
parents: 39329
diff changeset
670
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
671
40978
42f59d3f714d delta: exclude base candidate much smaller than the target
Boris Feld <boris.feld@octobus.net>
parents: 40957
diff changeset
672 # If a revision's full text is that much bigger than a base candidate full
42f59d3f714d delta: exclude base candidate much smaller than the target
Boris Feld <boris.feld@octobus.net>
parents: 40957
diff changeset
673 # text's, it is very unlikely that it will produce a valid delta. We no longer
42f59d3f714d delta: exclude base candidate much smaller than the target
Boris Feld <boris.feld@octobus.net>
parents: 40957
diff changeset
674 # consider these candidates.
41033
b373477948df revlog: limit base to rev size ratio to 500 instead of 50
Boris Feld <boris.feld@octobus.net>
parents: 40979
diff changeset
675 LIMIT_BASE2TEXT = 500
40978
42f59d3f714d delta: exclude base candidate much smaller than the target
Boris Feld <boris.feld@octobus.net>
parents: 40957
diff changeset
676
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
677
49611
2afee2176775 delta-find: expand a function definition and call before extendin it
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49610
diff changeset
678 def _candidategroups(
2afee2176775 delta-find: expand a function definition and call before extendin it
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49610
diff changeset
679 revlog,
2afee2176775 delta-find: expand a function definition and call before extendin it
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49610
diff changeset
680 textlen,
2afee2176775 delta-find: expand a function definition and call before extendin it
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49610
diff changeset
681 p1,
2afee2176775 delta-find: expand a function definition and call before extendin it
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49610
diff changeset
682 p2,
2afee2176775 delta-find: expand a function definition and call before extendin it
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49610
diff changeset
683 cachedelta,
49612
e706bb41fdb3 delta-find: move pre-filtering with other pre-filtering logic
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49611
diff changeset
684 excluded_bases=None,
e706bb41fdb3 delta-find: move pre-filtering with other pre-filtering logic
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49611
diff changeset
685 target_rev=None,
49681
c261a628e525 delta-find: use a single snapshot cache when applying a group to an object
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49680
diff changeset
686 snapshot_cache=None,
49611
2afee2176775 delta-find: expand a function definition and call before extendin it
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49610
diff changeset
687 ):
39336
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic
Boris Feld <boris.feld@octobus.net>
parents: 39335
diff changeset
688 """Provides group of revision to be tested as delta base
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic
Boris Feld <boris.feld@octobus.net>
parents: 39335
diff changeset
689
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic
Boris Feld <boris.feld@octobus.net>
parents: 39335
diff changeset
690 This top level function focus on emitting groups with unique and worthwhile
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic
Boris Feld <boris.feld@octobus.net>
parents: 39335
diff changeset
691 content. See _raw_candidate_groups for details about the group order.
39334
507f5b1dd7c8 revlogdeltas: extract _getcandidaterevs in a function
Boris Feld <boris.feld@octobus.net>
parents: 39333
diff changeset
692 """
39336
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic
Boris Feld <boris.feld@octobus.net>
parents: 39335
diff changeset
693 # should we try to build a delta?
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic
Boris Feld <boris.feld@octobus.net>
parents: 39335
diff changeset
694 if not (len(revlog) and revlog._storedeltachains):
39497
5b308a4e6d03 snapshot: use None as a stop value when looking for a good delta
Boris Feld <boris.feld@octobus.net>
parents: 39496
diff changeset
695 yield None
39336
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic
Boris Feld <boris.feld@octobus.net>
parents: 39335
diff changeset
696 return
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic
Boris Feld <boris.feld@octobus.net>
parents: 39335
diff changeset
697
50354
ca1522fe4ec8 delta-find: assume the target-rev if not specified
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49776
diff changeset
698 if target_rev is None:
ca1522fe4ec8 delta-find: assume the target-rev if not specified
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49776
diff changeset
699 target_rev = len(revlog)
ca1522fe4ec8 delta-find: assume the target-rev if not specified
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49776
diff changeset
700
51046
f636103c4d67 revlog: remove legacy usage of `_generaldelta`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 51045
diff changeset
701 if not revlog.delta_config.general_delta:
50355
0232571255d3 delta-find: never do anything fancy when general delta is off
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50354
diff changeset
702 # before general delta, there is only one possible delta base
0232571255d3 delta-find: never do anything fancy when general delta is off
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50354
diff changeset
703 yield (target_rev - 1,)
0232571255d3 delta-find: never do anything fancy when general delta is off
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50354
diff changeset
704 yield None
0232571255d3 delta-find: never do anything fancy when general delta is off
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50354
diff changeset
705 return
0232571255d3 delta-find: never do anything fancy when general delta is off
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50354
diff changeset
706
50698
f1b57672cb94 delta-find: remove dead code intended to deal with forced delta reuse
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50686
diff changeset
707 # the DELTA_BASE_REUSE_FORCE case should have been taken care of sooner so
f1b57672cb94 delta-find: remove dead code intended to deal with forced delta reuse
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50686
diff changeset
708 # we should never end up asking such question. Adding the assert as a
f1b57672cb94 delta-find: remove dead code intended to deal with forced delta reuse
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50686
diff changeset
709 # safe-guard to detect anything that would be fishy in this regard.
f1b57672cb94 delta-find: remove dead code intended to deal with forced delta reuse
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50686
diff changeset
710 assert (
f1b57672cb94 delta-find: remove dead code intended to deal with forced delta reuse
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50686
diff changeset
711 cachedelta is None
f1b57672cb94 delta-find: remove dead code intended to deal with forced delta reuse
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50686
diff changeset
712 or cachedelta[2] != DELTA_BASE_REUSE_FORCE
51046
f636103c4d67 revlog: remove legacy usage of `_generaldelta`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 51045
diff changeset
713 or not revlog.delta_config.general_delta
50698
f1b57672cb94 delta-find: remove dead code intended to deal with forced delta reuse
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50686
diff changeset
714 )
49776
acdb9a15137c bundle: when forcing acceptance of incoming delta also accept snapshot
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49775
diff changeset
715
39337
37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups
Boris Feld <boris.feld@octobus.net>
parents: 39336
diff changeset
716 deltalength = revlog.length
37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups
Boris Feld <boris.feld@octobus.net>
parents: 39336
diff changeset
717 deltaparent = revlog.deltaparent
40978
42f59d3f714d delta: exclude base candidate much smaller than the target
Boris Feld <boris.feld@octobus.net>
parents: 40957
diff changeset
718 sparse = revlog._sparserevlog
39498
04b75f3a3f2a snapshot: add refining logic at the findeltainfo level
Boris Feld <boris.feld@octobus.net>
parents: 39497
diff changeset
719 good = None
39337
37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups
Boris Feld <boris.feld@octobus.net>
parents: 39336
diff changeset
720
37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups
Boris Feld <boris.feld@octobus.net>
parents: 39336
diff changeset
721 deltas_limit = textlen * LIMIT_DELTA2TEXT
49657
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49615
diff changeset
722 group_chunk_size = revlog._candidate_group_chunk_size
39337
37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups
Boris Feld <boris.feld@octobus.net>
parents: 39336
diff changeset
723
42057
566daffc607d cleanup: use set literals where possible
Martin von Zweigbergk <martinvonz@google.com>
parents: 41819
diff changeset
724 tested = {nullrev}
49610
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
725 candidates = _refinedgroups(
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
726 revlog,
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
727 p1,
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
728 p2,
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
729 cachedelta,
49681
c261a628e525 delta-find: use a single snapshot cache when applying a group to an object
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49680
diff changeset
730 snapshot_cache=snapshot_cache,
49610
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
731 )
39499
51cec7fb672e snapshot: also use None as a stop value for `_refinegroup`
Boris Feld <boris.feld@octobus.net>
parents: 39498
diff changeset
732 while True:
39500
cc85ebb68ff9 snapshot: turn _refinedgroups into a coroutine
Boris Feld <boris.feld@octobus.net>
parents: 39499
diff changeset
733 temptative = candidates.send(good)
39499
51cec7fb672e snapshot: also use None as a stop value for `_refinegroup`
Boris Feld <boris.feld@octobus.net>
parents: 39498
diff changeset
734 if temptative is None:
51cec7fb672e snapshot: also use None as a stop value for `_refinegroup`
Boris Feld <boris.feld@octobus.net>
parents: 39498
diff changeset
735 break
39337
37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups
Boris Feld <boris.feld@octobus.net>
parents: 39336
diff changeset
736 group = []
37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups
Boris Feld <boris.feld@octobus.net>
parents: 39336
diff changeset
737 for rev in temptative:
37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups
Boris Feld <boris.feld@octobus.net>
parents: 39336
diff changeset
738 # skip over empty delta (no need to include them in a chain)
50357
8038493eb31a delta-find: simply code that is now never invoqued without general delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50356
diff changeset
739 while not (rev == nullrev or rev in tested or deltalength(rev)):
39594
bdb41eaa8b59 snapshot: fix line order when skipping over empty deltas
Boris Feld <boris.feld@octobus.net>
parents: 39505
diff changeset
740 tested.add(rev)
39337
37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups
Boris Feld <boris.feld@octobus.net>
parents: 39336
diff changeset
741 rev = deltaparent(rev)
40957
f960c51eebf3 delta: filter nullrev out first
Boris Feld <boris.feld@octobus.net>
parents: 40709
diff changeset
742 # no need to try a delta against nullrev, this will be done as a
f960c51eebf3 delta: filter nullrev out first
Boris Feld <boris.feld@octobus.net>
parents: 40709
diff changeset
743 # last resort.
f960c51eebf3 delta: filter nullrev out first
Boris Feld <boris.feld@octobus.net>
parents: 40709
diff changeset
744 if rev == nullrev:
f960c51eebf3 delta: filter nullrev out first
Boris Feld <boris.feld@octobus.net>
parents: 40709
diff changeset
745 continue
39337
37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups
Boris Feld <boris.feld@octobus.net>
parents: 39336
diff changeset
746 # filter out revision we tested already
37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups
Boris Feld <boris.feld@octobus.net>
parents: 39336
diff changeset
747 if rev in tested:
37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups
Boris Feld <boris.feld@octobus.net>
parents: 39336
diff changeset
748 continue
49768
bcae90c53def delta-find: add a delta-reuse policy that blindly accepts incoming deltas
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49681
diff changeset
749
49612
e706bb41fdb3 delta-find: move pre-filtering with other pre-filtering logic
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49611
diff changeset
750 # an higher authority deamed the base unworthy (e.g. censored)
e706bb41fdb3 delta-find: move pre-filtering with other pre-filtering logic
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49611
diff changeset
751 if excluded_bases is not None and rev in excluded_bases:
49615
4956942c0416 delta-find: adjust the moment when we mark something as "tested"
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49614
diff changeset
752 tested.add(rev)
49612
e706bb41fdb3 delta-find: move pre-filtering with other pre-filtering logic
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49611
diff changeset
753 continue
e706bb41fdb3 delta-find: move pre-filtering with other pre-filtering logic
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49611
diff changeset
754 # We are in some recomputation cases and that rev is too high in
e706bb41fdb3 delta-find: move pre-filtering with other pre-filtering logic
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49611
diff changeset
755 # the revlog
e706bb41fdb3 delta-find: move pre-filtering with other pre-filtering logic
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49611
diff changeset
756 if target_rev is not None and rev >= target_rev:
49615
4956942c0416 delta-find: adjust the moment when we mark something as "tested"
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49614
diff changeset
757 tested.add(rev)
49612
e706bb41fdb3 delta-find: move pre-filtering with other pre-filtering logic
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49611
diff changeset
758 continue
39337
37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups
Boris Feld <boris.feld@octobus.net>
parents: 39336
diff changeset
759 # filter out delta base that will never produce good delta
37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups
Boris Feld <boris.feld@octobus.net>
parents: 39336
diff changeset
760 if deltas_limit < revlog.length(rev):
49615
4956942c0416 delta-find: adjust the moment when we mark something as "tested"
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49614
diff changeset
761 tested.add(rev)
39337
37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups
Boris Feld <boris.feld@octobus.net>
parents: 39336
diff changeset
762 continue
40978
42f59d3f714d delta: exclude base candidate much smaller than the target
Boris Feld <boris.feld@octobus.net>
parents: 40957
diff changeset
763 if sparse and revlog.rawsize(rev) < (textlen // LIMIT_BASE2TEXT):
49615
4956942c0416 delta-find: adjust the moment when we mark something as "tested"
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49614
diff changeset
764 tested.add(rev)
40978
42f59d3f714d delta: exclude base candidate much smaller than the target
Boris Feld <boris.feld@octobus.net>
parents: 40957
diff changeset
765 continue
39337
37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups
Boris Feld <boris.feld@octobus.net>
parents: 39336
diff changeset
766 # no delta for rawtext-changing revs (see "candelta" for why)
37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups
Boris Feld <boris.feld@octobus.net>
parents: 39336
diff changeset
767 if revlog.flags(rev) & REVIDX_RAWTEXT_CHANGING_FLAGS:
49615
4956942c0416 delta-find: adjust the moment when we mark something as "tested"
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49614
diff changeset
768 tested.add(rev)
39337
37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups
Boris Feld <boris.feld@octobus.net>
parents: 39336
diff changeset
769 continue
49610
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
770
40979
ba09db267cb6 delta: ignore base whose chains already don't match expectations
Boris Feld <boris.feld@octobus.net>
parents: 40978
diff changeset
771 # If we reach here, we are about to build and test a delta.
ba09db267cb6 delta: ignore base whose chains already don't match expectations
Boris Feld <boris.feld@octobus.net>
parents: 40978
diff changeset
772 # The delta building process will compute the chaininfo in all
ba09db267cb6 delta: ignore base whose chains already don't match expectations
Boris Feld <boris.feld@octobus.net>
parents: 40978
diff changeset
773 # case, since that computation is cached, it is fine to access it
ba09db267cb6 delta: ignore base whose chains already don't match expectations
Boris Feld <boris.feld@octobus.net>
parents: 40978
diff changeset
774 # here too.
ba09db267cb6 delta: ignore base whose chains already don't match expectations
Boris Feld <boris.feld@octobus.net>
parents: 40978
diff changeset
775 chainlen, chainsize = revlog._chaininfo(rev)
ba09db267cb6 delta: ignore base whose chains already don't match expectations
Boris Feld <boris.feld@octobus.net>
parents: 40978
diff changeset
776 # if chain will be too long, skip base
51052
e80e2d614c9d revlog: remove legacy usage of `_maxchainlen`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 51046
diff changeset
777 if (
e80e2d614c9d revlog: remove legacy usage of `_maxchainlen`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 51046
diff changeset
778 revlog.delta_config.max_chain_len
e80e2d614c9d revlog: remove legacy usage of `_maxchainlen`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 51046
diff changeset
779 and chainlen >= revlog.delta_config.max_chain_len
e80e2d614c9d revlog: remove legacy usage of `_maxchainlen`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 51046
diff changeset
780 ):
49615
4956942c0416 delta-find: adjust the moment when we mark something as "tested"
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49614
diff changeset
781 tested.add(rev)
40979
ba09db267cb6 delta: ignore base whose chains already don't match expectations
Boris Feld <boris.feld@octobus.net>
parents: 40978
diff changeset
782 continue
ba09db267cb6 delta: ignore base whose chains already don't match expectations
Boris Feld <boris.feld@octobus.net>
parents: 40978
diff changeset
783 # if chain already have too much data, skip base
ba09db267cb6 delta: ignore base whose chains already don't match expectations
Boris Feld <boris.feld@octobus.net>
parents: 40978
diff changeset
784 if deltas_limit < chainsize:
49615
4956942c0416 delta-find: adjust the moment when we mark something as "tested"
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49614
diff changeset
785 tested.add(rev)
40979
ba09db267cb6 delta: ignore base whose chains already don't match expectations
Boris Feld <boris.feld@octobus.net>
parents: 40978
diff changeset
786 continue
42463
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint
Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 42057
diff changeset
787 if sparse and revlog.upperboundcomp is not None:
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint
Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 42057
diff changeset
788 maxcomp = revlog.upperboundcomp
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint
Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 42057
diff changeset
789 basenotsnap = (p1, p2, nullrev)
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint
Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 42057
diff changeset
790 if rev not in basenotsnap and revlog.issnapshot(rev):
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint
Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 42057
diff changeset
791 snapshotdepth = revlog.snapshotdepth(rev)
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint
Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 42057
diff changeset
792 # If text is significantly larger than the base, we can
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint
Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 42057
diff changeset
793 # expect the resulting delta to be proportional to the size
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint
Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 42057
diff changeset
794 # difference
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint
Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 42057
diff changeset
795 revsize = revlog.rawsize(rev)
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint
Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 42057
diff changeset
796 rawsizedistance = max(textlen - revsize, 0)
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint
Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 42057
diff changeset
797 # use an estimate of the compression upper bound.
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint
Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 42057
diff changeset
798 lowestrealisticdeltalen = rawsizedistance // maxcomp
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint
Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 42057
diff changeset
799
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint
Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 42057
diff changeset
800 # check the absolute constraint on the delta size
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint
Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 42057
diff changeset
801 snapshotlimit = textlen >> snapshotdepth
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint
Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 42057
diff changeset
802 if snapshotlimit < lowestrealisticdeltalen:
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint
Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 42057
diff changeset
803 # delta lower bound is larger than accepted upper bound
49615
4956942c0416 delta-find: adjust the moment when we mark something as "tested"
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49614
diff changeset
804 tested.add(rev)
42463
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint
Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 42057
diff changeset
805 continue
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint
Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 42057
diff changeset
806
42464
66c27df1be84 deltas: skip if projected delta size is bigger than previous snapshot
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42463
diff changeset
807 # check the relative constraint on the delta size
66c27df1be84 deltas: skip if projected delta size is bigger than previous snapshot
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42463
diff changeset
808 revlength = revlog.length(rev)
66c27df1be84 deltas: skip if projected delta size is bigger than previous snapshot
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42463
diff changeset
809 if revlength < lowestrealisticdeltalen:
66c27df1be84 deltas: skip if projected delta size is bigger than previous snapshot
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42463
diff changeset
810 # delta probable lower bound is larger than target base
49615
4956942c0416 delta-find: adjust the moment when we mark something as "tested"
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49614
diff changeset
811 tested.add(rev)
42464
66c27df1be84 deltas: skip if projected delta size is bigger than previous snapshot
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42463
diff changeset
812 continue
66c27df1be84 deltas: skip if projected delta size is bigger than previous snapshot
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42463
diff changeset
813
39337
37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups
Boris Feld <boris.feld@octobus.net>
parents: 39336
diff changeset
814 group.append(rev)
39336
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic
Boris Feld <boris.feld@octobus.net>
parents: 39335
diff changeset
815 if group:
49657
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49615
diff changeset
816 # When the size of the candidate group is big, it can result in a
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49615
diff changeset
817 # quite significant performance impact. To reduce this, we can send
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49615
diff changeset
818 # them in smaller batches until the new batch does not provide any
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49615
diff changeset
819 # improvements.
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49615
diff changeset
820 #
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49615
diff changeset
821 # This might reduce the overall efficiency of the compression in
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49615
diff changeset
822 # some corner cases, but that should also prevent very pathological
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49615
diff changeset
823 # cases from being an issue. (eg. 20 000 candidates).
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49615
diff changeset
824 #
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49615
diff changeset
825 # XXX note that the ordering of the group becomes important as it
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49615
diff changeset
826 # now impacts the final result. The current order is unprocessed
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49615
diff changeset
827 # and can be improved.
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49615
diff changeset
828 if group_chunk_size == 0:
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49615
diff changeset
829 tested.update(group)
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49615
diff changeset
830 good = yield tuple(group)
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49615
diff changeset
831 else:
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49615
diff changeset
832 prev_good = good
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49615
diff changeset
833 for start in range(0, len(group), group_chunk_size):
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49615
diff changeset
834 sub_group = group[start : start + group_chunk_size]
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49615
diff changeset
835 tested.update(sub_group)
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49615
diff changeset
836 good = yield tuple(sub_group)
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49615
diff changeset
837 if prev_good == good:
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49615
diff changeset
838 break
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49615
diff changeset
839
39497
5b308a4e6d03 snapshot: use None as a stop value when looking for a good delta
Boris Feld <boris.feld@octobus.net>
parents: 39496
diff changeset
840 yield None
39336
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic
Boris Feld <boris.feld@octobus.net>
parents: 39335
diff changeset
841
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
842
49681
c261a628e525 delta-find: use a single snapshot cache when applying a group to an object
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49680
diff changeset
843 def _refinedgroups(revlog, p1, p2, cachedelta, snapshot_cache=None):
39496
2f9f7889549b snapshot: introduce an intermediate `_refinedgroups` generator
Boris Feld <boris.feld@octobus.net>
parents: 39495
diff changeset
844 good = None
39501
993d7e2c8b79 snapshot: make sure we'll never refine delta base from a reused source
Boris Feld <boris.feld@octobus.net>
parents: 39500
diff changeset
845 # First we try to reuse a the delta contained in the bundle.
993d7e2c8b79 snapshot: make sure we'll never refine delta base from a reused source
Boris Feld <boris.feld@octobus.net>
parents: 39500
diff changeset
846 # (or from the source revlog)
993d7e2c8b79 snapshot: make sure we'll never refine delta base from a reused source
Boris Feld <boris.feld@octobus.net>
parents: 39500
diff changeset
847 #
993d7e2c8b79 snapshot: make sure we'll never refine delta base from a reused source
Boris Feld <boris.feld@octobus.net>
parents: 39500
diff changeset
848 # This logic only applies to general delta repositories and can be disabled
993d7e2c8b79 snapshot: make sure we'll never refine delta base from a reused source
Boris Feld <boris.feld@octobus.net>
parents: 39500
diff changeset
849 # through configuration. Disabling reuse source delta is useful when
993d7e2c8b79 snapshot: make sure we'll never refine delta base from a reused source
Boris Feld <boris.feld@octobus.net>
parents: 39500
diff changeset
850 # we want to make sure we recomputed "optimal" deltas.
49610
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
851 debug_info = None
49677
05db41701ece find-delta: pass the cache-delta usage policy alongside the cache-delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49675
diff changeset
852 if cachedelta is not None and cachedelta[2] > DELTA_BASE_REUSE_NO:
39501
993d7e2c8b79 snapshot: make sure we'll never refine delta base from a reused source
Boris Feld <boris.feld@octobus.net>
parents: 39500
diff changeset
853 # Assume what we received from the server is a good choice
993d7e2c8b79 snapshot: make sure we'll never refine delta base from a reused source
Boris Feld <boris.feld@octobus.net>
parents: 39500
diff changeset
854 # build delta will reuse the cache
49610
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
855 if debug_info is not None:
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
856 debug_info['cached-delta.tested'] += 1
39501
993d7e2c8b79 snapshot: make sure we'll never refine delta base from a reused source
Boris Feld <boris.feld@octobus.net>
parents: 39500
diff changeset
857 good = yield (cachedelta[0],)
993d7e2c8b79 snapshot: make sure we'll never refine delta base from a reused source
Boris Feld <boris.feld@octobus.net>
parents: 39500
diff changeset
858 if good is not None:
49610
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
859 if debug_info is not None:
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
860 debug_info['cached-delta.accepted'] += 1
39501
993d7e2c8b79 snapshot: make sure we'll never refine delta base from a reused source
Boris Feld <boris.feld@octobus.net>
parents: 39500
diff changeset
861 yield None
993d7e2c8b79 snapshot: make sure we'll never refine delta base from a reused source
Boris Feld <boris.feld@octobus.net>
parents: 39500
diff changeset
862 return
49681
c261a628e525 delta-find: use a single snapshot cache when applying a group to an object
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49680
diff changeset
863 if snapshot_cache is None:
c261a628e525 delta-find: use a single snapshot cache when applying a group to an object
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49680
diff changeset
864 snapshot_cache = SnapshotCache()
49610
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
865 groups = _rawgroups(
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
866 revlog,
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
867 p1,
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
868 p2,
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
869 cachedelta,
49678
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
870 snapshot_cache,
49610
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
871 )
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
872 for candidates in groups:
39496
2f9f7889549b snapshot: introduce an intermediate `_refinedgroups` generator
Boris Feld <boris.feld@octobus.net>
parents: 39495
diff changeset
873 good = yield candidates
2f9f7889549b snapshot: introduce an intermediate `_refinedgroups` generator
Boris Feld <boris.feld@octobus.net>
parents: 39495
diff changeset
874 if good is not None:
2f9f7889549b snapshot: introduce an intermediate `_refinedgroups` generator
Boris Feld <boris.feld@octobus.net>
parents: 39495
diff changeset
875 break
39502
e4d4361d0bcd snapshot: try to refine new snapshot base down the chain
Boris Feld <boris.feld@octobus.net>
parents: 39501
diff changeset
876
40428
bafa1c4bb7a8 sparse-revlog: only refine delta candidates in the sparse case (issue6006)
Boris Feld <boris.feld@octobus.net>
parents: 39777
diff changeset
877 # If sparse revlog is enabled, we can try to refine the available deltas
bafa1c4bb7a8 sparse-revlog: only refine delta candidates in the sparse case (issue6006)
Boris Feld <boris.feld@octobus.net>
parents: 39777
diff changeset
878 if not revlog._sparserevlog:
bafa1c4bb7a8 sparse-revlog: only refine delta candidates in the sparse case (issue6006)
Boris Feld <boris.feld@octobus.net>
parents: 39777
diff changeset
879 yield None
bafa1c4bb7a8 sparse-revlog: only refine delta candidates in the sparse case (issue6006)
Boris Feld <boris.feld@octobus.net>
parents: 39777
diff changeset
880 return
bafa1c4bb7a8 sparse-revlog: only refine delta candidates in the sparse case (issue6006)
Boris Feld <boris.feld@octobus.net>
parents: 39777
diff changeset
881
39502
e4d4361d0bcd snapshot: try to refine new snapshot base down the chain
Boris Feld <boris.feld@octobus.net>
parents: 39501
diff changeset
882 # if we have a refinable value, try to refine it
e4d4361d0bcd snapshot: try to refine new snapshot base down the chain
Boris Feld <boris.feld@octobus.net>
parents: 39501
diff changeset
883 if good is not None and good not in (p1, p2) and revlog.issnapshot(good):
e4d4361d0bcd snapshot: try to refine new snapshot base down the chain
Boris Feld <boris.feld@octobus.net>
parents: 39501
diff changeset
884 # refine snapshot down
e4d4361d0bcd snapshot: try to refine new snapshot base down the chain
Boris Feld <boris.feld@octobus.net>
parents: 39501
diff changeset
885 previous = None
e4d4361d0bcd snapshot: try to refine new snapshot base down the chain
Boris Feld <boris.feld@octobus.net>
parents: 39501
diff changeset
886 while previous != good:
e4d4361d0bcd snapshot: try to refine new snapshot base down the chain
Boris Feld <boris.feld@octobus.net>
parents: 39501
diff changeset
887 previous = good
e4d4361d0bcd snapshot: try to refine new snapshot base down the chain
Boris Feld <boris.feld@octobus.net>
parents: 39501
diff changeset
888 base = revlog.deltaparent(good)
e4d4361d0bcd snapshot: try to refine new snapshot base down the chain
Boris Feld <boris.feld@octobus.net>
parents: 39501
diff changeset
889 if base == nullrev:
e4d4361d0bcd snapshot: try to refine new snapshot base down the chain
Boris Feld <boris.feld@octobus.net>
parents: 39501
diff changeset
890 break
e4d4361d0bcd snapshot: try to refine new snapshot base down the chain
Boris Feld <boris.feld@octobus.net>
parents: 39501
diff changeset
891 good = yield (base,)
39503
5aef5afa8654 snapshot: refine candidate snapshot base upward
Boris Feld <boris.feld@octobus.net>
parents: 39502
diff changeset
892 # refine snapshot up
49678
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
893 if not snapshot_cache.snapshots:
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
894 snapshot_cache.update(revlog, good + 1)
39503
5aef5afa8654 snapshot: refine candidate snapshot base upward
Boris Feld <boris.feld@octobus.net>
parents: 39502
diff changeset
895 previous = None
5aef5afa8654 snapshot: refine candidate snapshot base upward
Boris Feld <boris.feld@octobus.net>
parents: 39502
diff changeset
896 while good != previous:
5aef5afa8654 snapshot: refine candidate snapshot base upward
Boris Feld <boris.feld@octobus.net>
parents: 39502
diff changeset
897 previous = good
49678
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
898 children = tuple(sorted(c for c in snapshot_cache.snapshots[good]))
39503
5aef5afa8654 snapshot: refine candidate snapshot base upward
Boris Feld <boris.feld@octobus.net>
parents: 39502
diff changeset
899 good = yield children
5aef5afa8654 snapshot: refine candidate snapshot base upward
Boris Feld <boris.feld@octobus.net>
parents: 39502
diff changeset
900
49610
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
901 if debug_info is not None:
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
902 if good is None:
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
903 debug_info['no-solution'] += 1
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
904
39499
51cec7fb672e snapshot: also use None as a stop value for `_refinegroup`
Boris Feld <boris.feld@octobus.net>
parents: 39498
diff changeset
905 yield None
39496
2f9f7889549b snapshot: introduce an intermediate `_refinedgroups` generator
Boris Feld <boris.feld@octobus.net>
parents: 39495
diff changeset
906
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
907
49678
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
908 def _rawgroups(revlog, p1, p2, cachedelta, snapshot_cache=None):
39336
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic
Boris Feld <boris.feld@octobus.net>
parents: 39335
diff changeset
909 """Provides group of revision to be tested as delta base
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic
Boris Feld <boris.feld@octobus.net>
parents: 39335
diff changeset
910
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic
Boris Feld <boris.feld@octobus.net>
parents: 39335
diff changeset
911 This lower level function focus on emitting delta theorically interresting
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic
Boris Feld <boris.feld@octobus.net>
parents: 39335
diff changeset
912 without looking it any practical details.
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic
Boris Feld <boris.feld@octobus.net>
parents: 39335
diff changeset
913
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic
Boris Feld <boris.feld@octobus.net>
parents: 39335
diff changeset
914 The group order aims at providing fast or small candidates first.
39334
507f5b1dd7c8 revlogdeltas: extract _getcandidaterevs in a function
Boris Feld <boris.feld@octobus.net>
parents: 39333
diff changeset
915 """
50357
8038493eb31a delta-find: simply code that is now never invoqued without general delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50356
diff changeset
916 # Why search for delta base if we cannot use a delta base ?
51046
f636103c4d67 revlog: remove legacy usage of `_generaldelta`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 51045
diff changeset
917 assert revlog.delta_config.general_delta
50357
8038493eb31a delta-find: simply code that is now never invoqued without general delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50356
diff changeset
918 # also see issue6056
8038493eb31a delta-find: simply code that is now never invoqued without general delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50356
diff changeset
919 sparse = revlog._sparserevlog
39334
507f5b1dd7c8 revlogdeltas: extract _getcandidaterevs in a function
Boris Feld <boris.feld@octobus.net>
parents: 39333
diff changeset
920 curr = len(revlog)
507f5b1dd7c8 revlogdeltas: extract _getcandidaterevs in a function
Boris Feld <boris.feld@octobus.net>
parents: 39333
diff changeset
921 prev = curr - 1
39492
a33f394b2bfd snapshot: try intermediate snapshot against parents' base
Boris Feld <boris.feld@octobus.net>
parents: 39488
diff changeset
922 deltachain = lambda rev: revlog._deltachain(rev)[0]
39334
507f5b1dd7c8 revlogdeltas: extract _getcandidaterevs in a function
Boris Feld <boris.feld@octobus.net>
parents: 39333
diff changeset
923
50357
8038493eb31a delta-find: simply code that is now never invoqued without general delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50356
diff changeset
924 # exclude already lazy tested base if any
8038493eb31a delta-find: simply code that is now never invoqued without general delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50356
diff changeset
925 parents = [p for p in (p1, p2) if p != nullrev]
39334
507f5b1dd7c8 revlogdeltas: extract _getcandidaterevs in a function
Boris Feld <boris.feld@octobus.net>
parents: 39333
diff changeset
926
50357
8038493eb31a delta-find: simply code that is now never invoqued without general delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50356
diff changeset
927 if not revlog._deltabothparents and len(parents) == 2:
8038493eb31a delta-find: simply code that is now never invoqued without general delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50356
diff changeset
928 parents.sort()
8038493eb31a delta-find: simply code that is now never invoqued without general delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50356
diff changeset
929 # To minimize the chance of having to build a fulltext,
8038493eb31a delta-find: simply code that is now never invoqued without general delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50356
diff changeset
930 # pick first whichever parent is closest to us (max rev)
8038493eb31a delta-find: simply code that is now never invoqued without general delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50356
diff changeset
931 yield (parents[1],)
8038493eb31a delta-find: simply code that is now never invoqued without general delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50356
diff changeset
932 # then the other one (min rev) if the first did not fit
8038493eb31a delta-find: simply code that is now never invoqued without general delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50356
diff changeset
933 yield (parents[0],)
8038493eb31a delta-find: simply code that is now never invoqued without general delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50356
diff changeset
934 elif len(parents) > 0:
8038493eb31a delta-find: simply code that is now never invoqued without general delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50356
diff changeset
935 # Test all parents (1 or 2), and keep the best candidate
8038493eb31a delta-find: simply code that is now never invoqued without general delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50356
diff changeset
936 yield parents
39334
507f5b1dd7c8 revlogdeltas: extract _getcandidaterevs in a function
Boris Feld <boris.feld@octobus.net>
parents: 39333
diff changeset
937
39492
a33f394b2bfd snapshot: try intermediate snapshot against parents' base
Boris Feld <boris.feld@octobus.net>
parents: 39488
diff changeset
938 if sparse and parents:
49678
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
939 if snapshot_cache is None:
49613
5447c1507c86 delta-find: small documentation update
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49612
diff changeset
940 # map: base-rev: [snapshot-revs]
49678
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
941 snapshot_cache = SnapshotCache()
39492
a33f394b2bfd snapshot: try intermediate snapshot against parents' base
Boris Feld <boris.feld@octobus.net>
parents: 39488
diff changeset
942 # See if we can use an existing snapshot in the parent chains to use as
a33f394b2bfd snapshot: try intermediate snapshot against parents' base
Boris Feld <boris.feld@octobus.net>
parents: 39488
diff changeset
943 # a base for a new intermediate-snapshot
39494
e72130f58f5d snapshot: consider all snapshots in the parents' chains
Boris Feld <boris.feld@octobus.net>
parents: 39493
diff changeset
944 #
e72130f58f5d snapshot: consider all snapshots in the parents' chains
Boris Feld <boris.feld@octobus.net>
parents: 39493
diff changeset
945 # search for snapshot in parents delta chain
e72130f58f5d snapshot: consider all snapshots in the parents' chains
Boris Feld <boris.feld@octobus.net>
parents: 39493
diff changeset
946 # map: snapshot-level: snapshot-rev
e72130f58f5d snapshot: consider all snapshots in the parents' chains
Boris Feld <boris.feld@octobus.net>
parents: 39493
diff changeset
947 parents_snaps = collections.defaultdict(set)
39504
05a165dc4f55 snapshot: extract parent chain computation
Boris Feld <boris.feld@octobus.net>
parents: 39503
diff changeset
948 candidate_chains = [deltachain(p) for p in parents]
05a165dc4f55 snapshot: extract parent chain computation
Boris Feld <boris.feld@octobus.net>
parents: 39503
diff changeset
949 for chain in candidate_chains:
05a165dc4f55 snapshot: extract parent chain computation
Boris Feld <boris.feld@octobus.net>
parents: 39503
diff changeset
950 for idx, s in enumerate(chain):
39494
e72130f58f5d snapshot: consider all snapshots in the parents' chains
Boris Feld <boris.feld@octobus.net>
parents: 39493
diff changeset
951 if not revlog.issnapshot(s):
e72130f58f5d snapshot: consider all snapshots in the parents' chains
Boris Feld <boris.feld@octobus.net>
parents: 39493
diff changeset
952 break
e72130f58f5d snapshot: consider all snapshots in the parents' chains
Boris Feld <boris.feld@octobus.net>
parents: 39493
diff changeset
953 parents_snaps[idx].add(s)
39495
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first
Boris Feld <boris.feld@octobus.net>
parents: 39494
diff changeset
954 snapfloor = min(parents_snaps[0]) + 1
49678
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
955 snapshot_cache.update(revlog, snapfloor)
39505
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
956 # search for the highest "unrelated" revision
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
957 #
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
958 # Adding snapshots used by "unrelated" revision increase the odd we
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
959 # reuse an independant, yet better snapshot chain.
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
960 #
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
961 # XXX instead of building a set of revisions, we could lazily enumerate
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
962 # over the chains. That would be more efficient, however we stick to
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
963 # simple code for now.
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
964 all_revs = set()
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
965 for chain in candidate_chains:
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
966 all_revs.update(chain)
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
967 other = None
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
968 for r in revlog.revs(prev, snapfloor):
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
969 if r not in all_revs:
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
970 other = r
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
971 break
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
972 if other is not None:
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
973 # To avoid unfair competition, we won't use unrelated intermediate
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
974 # snapshot that are deeper than the ones from the parent delta
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
975 # chain.
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
976 max_depth = max(parents_snaps.keys())
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
977 chain = deltachain(other)
49614
01ccb45b7393 delta-find: rename a variable for clarity
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49613
diff changeset
978 for depth, s in enumerate(chain):
39505
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
979 if s < snapfloor:
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
980 continue
49614
01ccb45b7393 delta-find: rename a variable for clarity
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49613
diff changeset
981 if max_depth < depth:
39505
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
982 break
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
983 if not revlog.issnapshot(s):
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
984 break
49614
01ccb45b7393 delta-find: rename a variable for clarity
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49613
diff changeset
985 parents_snaps[depth].add(s)
39494
e72130f58f5d snapshot: consider all snapshots in the parents' chains
Boris Feld <boris.feld@octobus.net>
parents: 39493
diff changeset
986 # Test them as possible intermediate snapshot base
e72130f58f5d snapshot: consider all snapshots in the parents' chains
Boris Feld <boris.feld@octobus.net>
parents: 39493
diff changeset
987 # We test them from highest to lowest level. High level one are more
e72130f58f5d snapshot: consider all snapshots in the parents' chains
Boris Feld <boris.feld@octobus.net>
parents: 39493
diff changeset
988 # likely to result in small delta
39495
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first
Boris Feld <boris.feld@octobus.net>
parents: 39494
diff changeset
989 floor = None
39494
e72130f58f5d snapshot: consider all snapshots in the parents' chains
Boris Feld <boris.feld@octobus.net>
parents: 39493
diff changeset
990 for idx, snaps in sorted(parents_snaps.items(), reverse=True):
39495
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first
Boris Feld <boris.feld@octobus.net>
parents: 39494
diff changeset
991 siblings = set()
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first
Boris Feld <boris.feld@octobus.net>
parents: 39494
diff changeset
992 for s in snaps:
49678
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
993 siblings.update(snapshot_cache.snapshots[s])
39495
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first
Boris Feld <boris.feld@octobus.net>
parents: 39494
diff changeset
994 # Before considering making a new intermediate snapshot, we check
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first
Boris Feld <boris.feld@octobus.net>
parents: 39494
diff changeset
995 # if an existing snapshot, children of base we consider, would be
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first
Boris Feld <boris.feld@octobus.net>
parents: 39494
diff changeset
996 # suitable.
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first
Boris Feld <boris.feld@octobus.net>
parents: 39494
diff changeset
997 #
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first
Boris Feld <boris.feld@octobus.net>
parents: 39494
diff changeset
998 # It give a change to reuse a delta chain "unrelated" to the
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first
Boris Feld <boris.feld@octobus.net>
parents: 39494
diff changeset
999 # current revision instead of starting our own. Without such
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first
Boris Feld <boris.feld@octobus.net>
parents: 39494
diff changeset
1000 # re-use, topological branches would keep reopening new chains.
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first
Boris Feld <boris.feld@octobus.net>
parents: 39494
diff changeset
1001 # Creating more and more snapshot as the repository grow.
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first
Boris Feld <boris.feld@octobus.net>
parents: 39494
diff changeset
1002
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first
Boris Feld <boris.feld@octobus.net>
parents: 39494
diff changeset
1003 if floor is not None:
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first
Boris Feld <boris.feld@octobus.net>
parents: 39494
diff changeset
1004 # We only do this for siblings created after the one in our
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first
Boris Feld <boris.feld@octobus.net>
parents: 39494
diff changeset
1005 # parent's delta chain. Those created before has less chances
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first
Boris Feld <boris.feld@octobus.net>
parents: 39494
diff changeset
1006 # to be valid base since our ancestors had to create a new
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first
Boris Feld <boris.feld@octobus.net>
parents: 39494
diff changeset
1007 # snapshot.
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first
Boris Feld <boris.feld@octobus.net>
parents: 39494
diff changeset
1008 siblings = [r for r in siblings if floor < r]
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first
Boris Feld <boris.feld@octobus.net>
parents: 39494
diff changeset
1009 yield tuple(sorted(siblings))
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first
Boris Feld <boris.feld@octobus.net>
parents: 39494
diff changeset
1010 # then test the base from our parent's delta chain.
39494
e72130f58f5d snapshot: consider all snapshots in the parents' chains
Boris Feld <boris.feld@octobus.net>
parents: 39493
diff changeset
1011 yield tuple(sorted(snaps))
39495
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first
Boris Feld <boris.feld@octobus.net>
parents: 39494
diff changeset
1012 floor = min(snaps)
39493
3ca144f1c8dd snapshot: search for unrelated but reusable full-snapshot
Boris Feld <boris.feld@octobus.net>
parents: 39492
diff changeset
1013 # No suitable base found in the parent chain, search if any full
3ca144f1c8dd snapshot: search for unrelated but reusable full-snapshot
Boris Feld <boris.feld@octobus.net>
parents: 39492
diff changeset
1014 # snapshots emitted since parent's base would be a suitable base for an
3ca144f1c8dd snapshot: search for unrelated but reusable full-snapshot
Boris Feld <boris.feld@octobus.net>
parents: 39492
diff changeset
1015 # intermediate snapshot.
3ca144f1c8dd snapshot: search for unrelated but reusable full-snapshot
Boris Feld <boris.feld@octobus.net>
parents: 39492
diff changeset
1016 #
3ca144f1c8dd snapshot: search for unrelated but reusable full-snapshot
Boris Feld <boris.feld@octobus.net>
parents: 39492
diff changeset
1017 # It give a chance to reuse a delta chain unrelated to the current
3ca144f1c8dd snapshot: search for unrelated but reusable full-snapshot
Boris Feld <boris.feld@octobus.net>
parents: 39492
diff changeset
1018 # revisions instead of starting our own. Without such re-use,
3ca144f1c8dd snapshot: search for unrelated but reusable full-snapshot
Boris Feld <boris.feld@octobus.net>
parents: 39492
diff changeset
1019 # topological branches would keep reopening new full chains. Creating
3ca144f1c8dd snapshot: search for unrelated but reusable full-snapshot
Boris Feld <boris.feld@octobus.net>
parents: 39492
diff changeset
1020 # more and more snapshot as the repository grow.
49680
40e24d82b513 delta-find: make sure we only use newer full snapshot as candidate
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49679
diff changeset
1021 full = [r for r in snapshot_cache.snapshots[nullrev] if snapfloor <= r]
40e24d82b513 delta-find: make sure we only use newer full snapshot as candidate
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49679
diff changeset
1022 yield tuple(sorted(full))
39492
a33f394b2bfd snapshot: try intermediate snapshot against parents' base
Boris Feld <boris.feld@octobus.net>
parents: 39488
diff changeset
1023
39505
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
1024 if not sparse:
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
1025 # other approach failed try against prev to hopefully save us a
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
1026 # fulltext.
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision
Boris Feld <boris.feld@octobus.net>
parents: 39504
diff changeset
1027 yield (prev,)
39334
507f5b1dd7c8 revlogdeltas: extract _getcandidaterevs in a function
Boris Feld <boris.feld@octobus.net>
parents: 39333
diff changeset
1028
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1029
49678
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1030 class SnapshotCache:
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1031 __slots__ = ('snapshots', '_start_rev', '_end_rev')
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1032
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1033 def __init__(self):
49679
b670eb3dd6c9 delta-find: use sets instead of list in the snapshot cache
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49678
diff changeset
1034 self.snapshots = collections.defaultdict(set)
49678
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1035 self._start_rev = None
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1036 self._end_rev = None
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1037
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1038 def update(self, revlog, start_rev=0):
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1039 """find snapshots from start_rev to tip"""
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1040 nb_revs = len(revlog)
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1041 end_rev = nb_revs - 1
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1042 if start_rev > end_rev:
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1043 return # range is empty
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1044
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1045 if self._start_rev is None:
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1046 assert self._end_rev is None
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1047 self._update(revlog, start_rev, end_rev)
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1048 elif not (self._start_rev <= start_rev and end_rev <= self._end_rev):
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1049 if start_rev < self._start_rev:
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1050 self._update(revlog, start_rev, self._start_rev - 1)
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1051 if self._end_rev < end_rev:
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1052 self._update(revlog, self._end_rev + 1, end_rev)
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1053
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1054 if self._start_rev is None:
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1055 assert self._end_rev is None
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1056 self._end_rev = end_rev
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1057 self._start_rev = start_rev
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1058 else:
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1059 self._start_rev = min(self._start_rev, start_rev)
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1060 self._end_rev = max(self._end_rev, end_rev)
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1061 assert self._start_rev <= self._end_rev, (
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1062 self._start_rev,
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1063 self._end_rev,
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1064 )
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1065
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1066 def _update(self, revlog, start_rev, end_rev):
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1067 """internal method that actually do update content"""
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1068 assert self._start_rev is None or (
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1069 start_rev < self._start_rev or start_rev > self._end_rev
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1070 ), (self._start_rev, self._end_rev, start_rev, end_rev)
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1071 assert self._start_rev is None or (
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1072 end_rev < self._start_rev or end_rev > self._end_rev
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1073 ), (self._start_rev, self._end_rev, start_rev, end_rev)
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1074 cache = self.snapshots
50928
d718eddf01d9 safehasattr: drop usage in favor of hasattr
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50698
diff changeset
1075 if hasattr(revlog.index, 'findsnapshots'):
49678
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1076 revlog.index.findsnapshots(cache, start_rev, end_rev)
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1077 else:
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1078 deltaparent = revlog.deltaparent
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1079 issnapshot = revlog.issnapshot
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1080 for rev in revlog.revs(start_rev, end_rev):
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1081 if issnapshot(rev):
49679
b670eb3dd6c9 delta-find: use sets instead of list in the snapshot cache
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49678
diff changeset
1082 cache[deltaparent(rev)].add(rev)
49678
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1083
efbbc2f9121e delta-find: use a smarter object for snapshot caching
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49677
diff changeset
1084
48946
642e31cb55f0 py3: use class X: instead of class X(object):
Gregory Szorc <gregory.szorc@gmail.com>
parents: 48875
diff changeset
1085 class deltacomputer:
49610
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
1086 def __init__(
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
1087 self,
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
1088 revlog,
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
1089 write_debug=None,
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
1090 debug_search=False,
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
1091 debug_info=None,
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
1092 ):
35738
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1093 self.revlog = revlog
49226
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48946
diff changeset
1094 self._write_debug = write_debug
50649
c84cc0ac77e4 delta-fine: use the `_debug_search` attribute directly
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50648
diff changeset
1095 if write_debug is None:
c84cc0ac77e4 delta-fine: use the `_debug_search` attribute directly
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50648
diff changeset
1096 self._debug_search = False
c84cc0ac77e4 delta-fine: use the `_debug_search` attribute directly
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50648
diff changeset
1097 else:
c84cc0ac77e4 delta-fine: use the `_debug_search` attribute directly
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50648
diff changeset
1098 self._debug_search = debug_search
49610
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
1099 self._debug_info = debug_info
49681
c261a628e525 delta-find: use a single snapshot cache when applying a group to an object
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49680
diff changeset
1100 self._snapshot_cache = SnapshotCache()
35738
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1101
50648
5d210ff4b657 delta-find: move the `gather_debug` logic in a property
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50357
diff changeset
1102 @property
5d210ff4b657 delta-find: move the `gather_debug` logic in a property
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50357
diff changeset
1103 def _gather_debug(self):
5d210ff4b657 delta-find: move the `gather_debug` logic in a property
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50357
diff changeset
1104 return self._write_debug is not None or self._debug_info is not None
5d210ff4b657 delta-find: move the `gather_debug` logic in a property
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50357
diff changeset
1105
51020
509f0f7fc89e delta-computer: stop explicitly taking file handle
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50929
diff changeset
1106 def buildtext(self, revinfo):
35738
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1107 """Builds a fulltext version of a revision
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1108
47399
34cc102c73f5 revlog: move `revisioninfo` in `revlogutils`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47253
diff changeset
1109 revinfo: revisioninfo instance that contains all needed info
35738
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1110 """
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1111 btext = revinfo.btext
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1112 if btext[0] is not None:
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1113 return btext[0]
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1114
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1115 revlog = self.revlog
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1116 cachedelta = revinfo.cachedelta
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1117 baserev = cachedelta[0]
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1118 delta = cachedelta[1]
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1119
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1120 fulltext = btext[0] = _textfromdelta(
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1121 revlog,
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1122 baserev,
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1123 delta,
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1124 revinfo.p1,
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1125 revinfo.p2,
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1126 revinfo.flags,
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1127 revinfo.node,
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1128 )
39331
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function
Boris Feld <boris.feld@octobus.net>
parents: 39330
diff changeset
1129 return fulltext
35738
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1130
51020
509f0f7fc89e delta-computer: stop explicitly taking file handle
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50929
diff changeset
1131 def _builddeltadiff(self, base, revinfo):
35738
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1132 revlog = self.revlog
51020
509f0f7fc89e delta-computer: stop explicitly taking file handle
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50929
diff changeset
1133 t = self.buildtext(revinfo)
35738
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1134 if revlog.iscensored(base):
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1135 # deltas based on a censored revision must replace the
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1136 # full content in one patch, so delta works everywhere
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1137 header = mdiff.replacediffheader(revlog.rawsize(base), len(t))
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1138 delta = header + t
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1139 else:
51020
509f0f7fc89e delta-computer: stop explicitly taking file handle
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50929
diff changeset
1140 ptext = revlog.rawdata(base)
35738
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1141 delta = mdiff.textdiff(ptext, t)
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1142
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1143 return delta
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1144
51020
509f0f7fc89e delta-computer: stop explicitly taking file handle
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50929
diff changeset
1145 def _builddeltainfo(self, revinfo, base, target_rev=None):
35738
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1146 # can we use the cached delta?
42465
6e9ba867a946 delta: move some delta chain related computation earlier in deltainfo
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42464
diff changeset
1147 revlog = self.revlog
6e9ba867a946 delta: move some delta chain related computation earlier in deltainfo
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42464
diff changeset
1148 chainbase = revlog.chainbase(base)
51046
f636103c4d67 revlog: remove legacy usage of `_generaldelta`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 51045
diff changeset
1149 if revlog.delta_config.general_delta:
42465
6e9ba867a946 delta: move some delta chain related computation earlier in deltainfo
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42464
diff changeset
1150 deltabase = base
6e9ba867a946 delta: move some delta chain related computation earlier in deltainfo
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42464
diff changeset
1151 else:
50356
2a6949ab9d23 delta-find: add a simple safeguard to prevent bad non-general-delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50355
diff changeset
1152 if target_rev is not None and base != target_rev - 1:
2a6949ab9d23 delta-find: add a simple safeguard to prevent bad non-general-delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50355
diff changeset
1153 msg = (
2a6949ab9d23 delta-find: add a simple safeguard to prevent bad non-general-delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50355
diff changeset
1154 b'general delta cannot use delta for something else '
2a6949ab9d23 delta-find: add a simple safeguard to prevent bad non-general-delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50355
diff changeset
1155 b'than `prev`: %d<-%d'
2a6949ab9d23 delta-find: add a simple safeguard to prevent bad non-general-delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50355
diff changeset
1156 )
2a6949ab9d23 delta-find: add a simple safeguard to prevent bad non-general-delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50355
diff changeset
1157 msg %= (base, target_rev)
2a6949ab9d23 delta-find: add a simple safeguard to prevent bad non-general-delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50355
diff changeset
1158 raise error.ProgrammingError(msg)
42465
6e9ba867a946 delta: move some delta chain related computation earlier in deltainfo
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42464
diff changeset
1159 deltabase = chainbase
6e9ba867a946 delta: move some delta chain related computation earlier in deltainfo
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42464
diff changeset
1160 snapshotdepth = None
6e9ba867a946 delta: move some delta chain related computation earlier in deltainfo
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42464
diff changeset
1161 if revlog._sparserevlog and deltabase == nullrev:
6e9ba867a946 delta: move some delta chain related computation earlier in deltainfo
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42464
diff changeset
1162 snapshotdepth = 0
6e9ba867a946 delta: move some delta chain related computation earlier in deltainfo
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42464
diff changeset
1163 elif revlog._sparserevlog and revlog.issnapshot(deltabase):
6e9ba867a946 delta: move some delta chain related computation earlier in deltainfo
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42464
diff changeset
1164 # A delta chain should always be one full snapshot,
6e9ba867a946 delta: move some delta chain related computation earlier in deltainfo
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42464
diff changeset
1165 # zero or more semi-snapshots, and zero or more deltas
6e9ba867a946 delta: move some delta chain related computation earlier in deltainfo
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42464
diff changeset
1166 p1, p2 = revlog.rev(revinfo.p1), revlog.rev(revinfo.p2)
6e9ba867a946 delta: move some delta chain related computation earlier in deltainfo
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42464
diff changeset
1167 if deltabase not in (p1, p2) and revlog.issnapshot(deltabase):
6e9ba867a946 delta: move some delta chain related computation earlier in deltainfo
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42464
diff changeset
1168 snapshotdepth = len(revlog._deltachain(deltabase)[0])
39595
a911932d5003 revlog: reuse cached delta for identical base revision (issue5975)
Boris Feld <boris.feld@octobus.net>
parents: 39594
diff changeset
1169 delta = None
a911932d5003 revlog: reuse cached delta for identical base revision (issue5975)
Boris Feld <boris.feld@octobus.net>
parents: 39594
diff changeset
1170 if revinfo.cachedelta:
49675
0fca63953810 find-delta: minor preparatory change
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49674
diff changeset
1171 cachebase = revinfo.cachedelta[0]
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1172 # check if the diff still apply
39595
a911932d5003 revlog: reuse cached delta for identical base revision (issue5975)
Boris Feld <boris.feld@octobus.net>
parents: 39594
diff changeset
1173 currentbase = cachebase
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1174 while (
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1175 currentbase != nullrev
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1176 and currentbase != base
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1177 and self.revlog.length(currentbase) == 0
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1178 ):
39595
a911932d5003 revlog: reuse cached delta for identical base revision (issue5975)
Boris Feld <boris.feld@octobus.net>
parents: 39594
diff changeset
1179 currentbase = self.revlog.deltaparent(currentbase)
41819
688fc33e105d storage: introduce a `revlog.reuse-external-delta` config
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 41447
diff changeset
1180 if self.revlog._lazydelta and currentbase == base:
39595
a911932d5003 revlog: reuse cached delta for identical base revision (issue5975)
Boris Feld <boris.feld@octobus.net>
parents: 39594
diff changeset
1181 delta = revinfo.cachedelta[1]
a911932d5003 revlog: reuse cached delta for identical base revision (issue5975)
Boris Feld <boris.feld@octobus.net>
parents: 39594
diff changeset
1182 if delta is None:
51020
509f0f7fc89e delta-computer: stop explicitly taking file handle
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50929
diff changeset
1183 delta = self._builddeltadiff(base, revinfo)
50649
c84cc0ac77e4 delta-fine: use the `_debug_search` attribute directly
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50648
diff changeset
1184 if self._debug_search:
49228
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1185 msg = b"DBG-DELTAS-SEARCH: uncompressed-delta-size=%d\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1186 msg %= len(delta)
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1187 self._write_debug(msg)
42467
c1c1872d25d1 deltas: skip if projected compressed size does not match text size constraint
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42466
diff changeset
1188 # snapshotdept need to be neither None nor 0 level snapshot
c1c1872d25d1 deltas: skip if projected compressed size does not match text size constraint
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42466
diff changeset
1189 if revlog.upperboundcomp is not None and snapshotdepth:
c1c1872d25d1 deltas: skip if projected compressed size does not match text size constraint
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42466
diff changeset
1190 lowestrealisticdeltalen = len(delta) // revlog.upperboundcomp
c1c1872d25d1 deltas: skip if projected compressed size does not match text size constraint
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42466
diff changeset
1191 snapshotlimit = revinfo.textlen >> snapshotdepth
50649
c84cc0ac77e4 delta-fine: use the `_debug_search` attribute directly
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50648
diff changeset
1192 if self._debug_search:
49228
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1193 msg = b"DBG-DELTAS-SEARCH: projected-lower-size=%d\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1194 msg %= lowestrealisticdeltalen
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1195 self._write_debug(msg)
42467
c1c1872d25d1 deltas: skip if projected compressed size does not match text size constraint
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42466
diff changeset
1196 if snapshotlimit < lowestrealisticdeltalen:
50649
c84cc0ac77e4 delta-fine: use the `_debug_search` attribute directly
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50648
diff changeset
1197 if self._debug_search:
49228
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1198 msg = b"DBG-DELTAS-SEARCH: DISCARDED (snapshot limit)\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1199 self._write_debug(msg)
42467
c1c1872d25d1 deltas: skip if projected compressed size does not match text size constraint
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42466
diff changeset
1200 return None
42468
9b5fbe5ead89 deltas: skip if projected compressed size is bigger than previous snapshot
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42467
diff changeset
1201 if revlog.length(base) < lowestrealisticdeltalen:
50649
c84cc0ac77e4 delta-fine: use the `_debug_search` attribute directly
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50648
diff changeset
1202 if self._debug_search:
49228
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1203 msg = b"DBG-DELTAS-SEARCH: DISCARDED (prev size)\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1204 self._write_debug(msg)
42468
9b5fbe5ead89 deltas: skip if projected compressed size is bigger than previous snapshot
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42467
diff changeset
1205 return None
35738
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1206 header, data = revlog.compress(delta)
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1207 deltalen = len(header) + len(data)
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1208 offset = revlog.end(len(revlog) - 1)
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1209 dist = deltalen + offset - revlog.start(chainbase)
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1210 chainlen, compresseddeltalen = revlog._chaininfo(base)
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1211 chainlen += 1
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1212 compresseddeltalen += deltalen
39154
e0da43e2f71f revlog: compute snapshot depth on delta info
Boris Feld <boris.feld@octobus.net>
parents: 39152
diff changeset
1213
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1214 return _deltainfo(
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1215 dist,
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1216 deltalen,
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1217 (header, data),
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1218 deltabase,
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1219 chainbase,
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1220 chainlen,
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1221 compresseddeltalen,
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1222 snapshotdepth,
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1223 )
35738
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1224
51020
509f0f7fc89e delta-computer: stop explicitly taking file handle
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50929
diff changeset
1225 def _fullsnapshotinfo(self, revinfo, curr):
509f0f7fc89e delta-computer: stop explicitly taking file handle
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50929
diff changeset
1226 rawtext = self.buildtext(revinfo)
39333
5d343a24bff5 revlogdeltas: always return a delta info object in finddeltainfo
Boris Feld <boris.feld@octobus.net>
parents: 39332
diff changeset
1227 data = self.revlog.compress(rawtext)
5d343a24bff5 revlogdeltas: always return a delta info object in finddeltainfo
Boris Feld <boris.feld@octobus.net>
parents: 39332
diff changeset
1228 compresseddeltalen = deltalen = dist = len(data[1]) + len(data[0])
5d343a24bff5 revlogdeltas: always return a delta info object in finddeltainfo
Boris Feld <boris.feld@octobus.net>
parents: 39332
diff changeset
1229 deltabase = chainbase = curr
5d343a24bff5 revlogdeltas: always return a delta info object in finddeltainfo
Boris Feld <boris.feld@octobus.net>
parents: 39332
diff changeset
1230 snapshotdepth = 0
5d343a24bff5 revlogdeltas: always return a delta info object in finddeltainfo
Boris Feld <boris.feld@octobus.net>
parents: 39332
diff changeset
1231 chainlen = 1
5d343a24bff5 revlogdeltas: always return a delta info object in finddeltainfo
Boris Feld <boris.feld@octobus.net>
parents: 39332
diff changeset
1232
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1233 return _deltainfo(
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1234 dist,
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1235 deltalen,
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1236 data,
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1237 deltabase,
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1238 chainbase,
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1239 chainlen,
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1240 compresseddeltalen,
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1241 snapshotdepth,
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1242 )
39333
5d343a24bff5 revlogdeltas: always return a delta info object in finddeltainfo
Boris Feld <boris.feld@octobus.net>
parents: 39332
diff changeset
1243
51020
509f0f7fc89e delta-computer: stop explicitly taking file handle
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50929
diff changeset
1244 def finddeltainfo(self, revinfo, excluded_bases=None, target_rev=None):
35738
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1245 """Find an acceptable delta against a candidate revision
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1246
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1247 revinfo: information about the revision (instance of _revisioninfo)
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1248
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1249 Returns the first acceptable candidate revision, as ordered by
39334
507f5b1dd7c8 revlogdeltas: extract _getcandidaterevs in a function
Boris Feld <boris.feld@octobus.net>
parents: 39333
diff changeset
1250 _candidategroups
39333
5d343a24bff5 revlogdeltas: always return a delta info object in finddeltainfo
Boris Feld <boris.feld@octobus.net>
parents: 39332
diff changeset
1251
5d343a24bff5 revlogdeltas: always return a delta info object in finddeltainfo
Boris Feld <boris.feld@octobus.net>
parents: 39332
diff changeset
1252 If no suitable deltabase is found, we return delta info for a full
5d343a24bff5 revlogdeltas: always return a delta info object in finddeltainfo
Boris Feld <boris.feld@octobus.net>
parents: 39332
diff changeset
1253 snapshot.
47401
1efe3cdef53a revlog: add a ways to blacklist some revision when searching for a delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47399
diff changeset
1254
1efe3cdef53a revlog: add a ways to blacklist some revision when searching for a delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47399
diff changeset
1255 `excluded_bases` is an optional set of revision that cannot be used as
1efe3cdef53a revlog: add a ways to blacklist some revision when searching for a delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47399
diff changeset
1256 a delta base. Use this to recompute delta suitable in censor or strip
1efe3cdef53a revlog: add a ways to blacklist some revision when searching for a delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47399
diff changeset
1257 context.
35738
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1258 """
47456
93f4e183b3f5 deltas: at a `target_rev` parameter to finddeltainfo
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47452
diff changeset
1259 if target_rev is None:
47457
f8330a3fc39f censor: implement censoring for revlogv2
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47456
diff changeset
1260 target_rev = len(self.revlog)
47456
93f4e183b3f5 deltas: at a `target_rev` parameter to finddeltainfo
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47452
diff changeset
1261
50653
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1262 gather_debug = self._gather_debug
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1263 cachedelta = revinfo.cachedelta
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1264 revlog = self.revlog
50657
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1265 p1r = p2r = None
50653
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1266
50657
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1267 if excluded_bases is None:
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1268 excluded_bases = set()
50653
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1269
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1270 if gather_debug:
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1271 start = util.timer()
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1272 dbg = self._one_dbg_data()
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1273 dbg['revision'] = target_rev
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1274 target_revlog = b"UNKNOWN"
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1275 target_type = self.revlog.target[0]
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1276 target_key = self.revlog.target[1]
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1277 if target_type == KIND_CHANGELOG:
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1278 target_revlog = b'CHANGELOG:'
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1279 elif target_type == KIND_MANIFESTLOG:
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1280 target_revlog = b'MANIFESTLOG:'
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1281 if target_key:
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1282 target_revlog += b'%s:' % target_key
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1283 elif target_type == KIND_FILELOG:
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1284 target_revlog = b'FILELOG:'
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1285 if target_key:
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1286 target_revlog += b'%s:' % target_key
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1287 dbg['target-revlog'] = target_revlog
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1288 p1r = revlog.rev(revinfo.p1)
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1289 p2r = revlog.rev(revinfo.p2)
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1290 if p1r != nullrev:
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1291 p1_chain_len = revlog._chaininfo(p1r)[0]
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1292 else:
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1293 p1_chain_len = -1
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1294 if p2r != nullrev:
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1295 p2_chain_len = revlog._chaininfo(p2r)[0]
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1296 else:
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1297 p2_chain_len = -1
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1298 dbg['p1-chain-len'] = p1_chain_len
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1299 dbg['p2-chain-len'] = p2_chain_len
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1300
50654
bfb6404089a5 delta-find: gather the condition to blindly use a full snapshot together
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50653
diff changeset
1301 # 1) if the revision is empty, no amount of delta can beat it
bfb6404089a5 delta-find: gather the condition to blindly use a full snapshot together
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50653
diff changeset
1302 #
bfb6404089a5 delta-find: gather the condition to blindly use a full snapshot together
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50653
diff changeset
1303 # 2) no delta for flag processor revision (see "candelta" for why)
bfb6404089a5 delta-find: gather the condition to blindly use a full snapshot together
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50653
diff changeset
1304 # not calling candelta since only one revision needs test, also to
bfb6404089a5 delta-find: gather the condition to blindly use a full snapshot together
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50653
diff changeset
1305 # avoid overhead fetching flags again.
bfb6404089a5 delta-find: gather the condition to blindly use a full snapshot together
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50653
diff changeset
1306 if not revinfo.textlen or revinfo.flags & REVIDX_RAWTEXT_CHANGING_FLAGS:
51020
509f0f7fc89e delta-computer: stop explicitly taking file handle
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50929
diff changeset
1307 deltainfo = self._fullsnapshotinfo(revinfo, target_rev)
50655
485c9410b75a deltafind: issue debug information when we fast-path rivial case too
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50654
diff changeset
1308 if gather_debug:
485c9410b75a deltafind: issue debug information when we fast-path rivial case too
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50654
diff changeset
1309 end = util.timer()
485c9410b75a deltafind: issue debug information when we fast-path rivial case too
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50654
diff changeset
1310 dbg['duration'] = end - start
485c9410b75a deltafind: issue debug information when we fast-path rivial case too
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50654
diff changeset
1311 dbg[
485c9410b75a deltafind: issue debug information when we fast-path rivial case too
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50654
diff changeset
1312 'delta-base'
485c9410b75a deltafind: issue debug information when we fast-path rivial case too
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50654
diff changeset
1313 ] = deltainfo.base # pytype: disable=attribute-error
485c9410b75a deltafind: issue debug information when we fast-path rivial case too
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50654
diff changeset
1314 dbg['search_round_count'] = 0
50657
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1315 dbg['using-cached-base'] = False
50655
485c9410b75a deltafind: issue debug information when we fast-path rivial case too
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50654
diff changeset
1316 dbg['delta_try_count'] = 0
485c9410b75a deltafind: issue debug information when we fast-path rivial case too
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50654
diff changeset
1317 dbg['type'] = b"full"
485c9410b75a deltafind: issue debug information when we fast-path rivial case too
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50654
diff changeset
1318 dbg['snapshot-depth'] = 0
485c9410b75a deltafind: issue debug information when we fast-path rivial case too
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50654
diff changeset
1319 self._dbg_process_data(dbg)
485c9410b75a deltafind: issue debug information when we fast-path rivial case too
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50654
diff changeset
1320 return deltainfo
39085
dbb3e9e44fce revlog: do not search for delta for empty content
Boris Feld <boris.feld@octobus.net>
parents: 39084
diff changeset
1321
50657
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1322 deltainfo = None
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1323
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1324 # If this source delta are to be forcibly reuse, let us comply early.
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1325 if (
51046
f636103c4d67 revlog: remove legacy usage of `_generaldelta`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 51045
diff changeset
1326 revlog.delta_config.general_delta
50657
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1327 and revinfo.cachedelta is not None
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1328 and revinfo.cachedelta[2] == DELTA_BASE_REUSE_FORCE
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1329 ):
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1330 base = revinfo.cachedelta[0]
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1331 if base == nullrev:
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1332 dbg_type = b"full"
51020
509f0f7fc89e delta-computer: stop explicitly taking file handle
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50929
diff changeset
1333 deltainfo = self._fullsnapshotinfo(revinfo, target_rev)
50657
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1334 if gather_debug:
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1335 snapshotdepth = 0
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1336 elif base not in excluded_bases:
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1337 delta = revinfo.cachedelta[1]
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1338 header, data = revlog.compress(delta)
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1339 deltalen = len(header) + len(data)
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1340 if gather_debug:
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1341 offset = revlog.end(len(revlog) - 1)
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1342 chainbase = revlog.chainbase(base)
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1343 distance = deltalen + offset - revlog.start(chainbase)
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1344 chainlen, compresseddeltalen = revlog._chaininfo(base)
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1345 chainlen += 1
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1346 compresseddeltalen += deltalen
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1347 if base == p1r or base == p2r:
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1348 dbg_type = b"delta"
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1349 snapshotdepth = None
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1350 elif not revlog.issnapshot(base):
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1351 snapshotdepth = None
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1352 else:
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1353 dbg_type = b"snapshot"
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1354 snapshotdepth = revlog.snapshotdepth(base) + 1
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1355 else:
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1356 distance = None
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1357 chainbase = None
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1358 chainlen = None
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1359 compresseddeltalen = None
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1360 snapshotdepth = None
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1361 deltainfo = _deltainfo(
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1362 distance=distance,
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1363 deltalen=deltalen,
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1364 data=(header, data),
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1365 base=base,
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1366 chainbase=chainbase,
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1367 chainlen=chainlen,
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1368 compresseddeltalen=compresseddeltalen,
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1369 snapshotdepth=snapshotdepth,
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1370 )
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1371
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1372 if deltainfo is not None:
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1373 if gather_debug:
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1374 end = util.timer()
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1375 dbg['duration'] = end - start
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1376 dbg[
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1377 'delta-base'
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1378 ] = deltainfo.base # pytype: disable=attribute-error
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1379 dbg['search_round_count'] = 0
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1380 dbg['using-cached-base'] = True
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1381 dbg['delta_try_count'] = 0
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1382 dbg['type'] = b"full"
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1383 if snapshotdepth is None:
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1384 dbg['snapshot-depth'] = 0
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1385 else:
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1386 dbg['snapshot-depth'] = snapshotdepth
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1387 self._dbg_process_data(dbg)
e77ca247b85b delta-find: fix pulled-delta-reuse-policy=forced behavior
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50655
diff changeset
1388 return deltainfo
47401
1efe3cdef53a revlog: add a ways to blacklist some revision when searching for a delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47399
diff changeset
1389
49226
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48946
diff changeset
1390 # count the number of different delta we tried (for debug purpose)
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48946
diff changeset
1391 dbg_try_count = 0
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48946
diff changeset
1392 # count the number of "search round" we did. (for debug purpose)
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48946
diff changeset
1393 dbg_try_rounds = 0
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48946
diff changeset
1394 dbg_type = b'unknown'
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48946
diff changeset
1395
50653
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1396 if p1r is None:
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1397 p1r = revlog.rev(revinfo.p1)
f930b1b1d671 delta-find: initialize the debug information much sooner (when possible)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50652
diff changeset
1398 p2r = revlog.rev(revinfo.p2)
49226
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48946
diff changeset
1399
50649
c84cc0ac77e4 delta-fine: use the `_debug_search` attribute directly
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50648
diff changeset
1400 if self._debug_search:
49228
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1401 msg = b"DBG-DELTAS-SEARCH: SEARCH rev=%d\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1402 msg %= target_rev
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1403 self._write_debug(msg)
49226
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48946
diff changeset
1404
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1405 groups = _candidategroups(
49611
2afee2176775 delta-find: expand a function definition and call before extendin it
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49610
diff changeset
1406 self.revlog,
2afee2176775 delta-find: expand a function definition and call before extendin it
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49610
diff changeset
1407 revinfo.textlen,
2afee2176775 delta-find: expand a function definition and call before extendin it
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49610
diff changeset
1408 p1r,
2afee2176775 delta-find: expand a function definition and call before extendin it
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49610
diff changeset
1409 p2r,
2afee2176775 delta-find: expand a function definition and call before extendin it
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49610
diff changeset
1410 cachedelta,
49612
e706bb41fdb3 delta-find: move pre-filtering with other pre-filtering logic
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49611
diff changeset
1411 excluded_bases,
e706bb41fdb3 delta-find: move pre-filtering with other pre-filtering logic
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49611
diff changeset
1412 target_rev,
49681
c261a628e525 delta-find: use a single snapshot cache when applying a group to an object
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49680
diff changeset
1413 snapshot_cache=self._snapshot_cache,
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42992
diff changeset
1414 )
39497
5b308a4e6d03 snapshot: use None as a stop value when looking for a good delta
Boris Feld <boris.feld@octobus.net>
parents: 39496
diff changeset
1415 candidaterevs = next(groups)
5b308a4e6d03 snapshot: use None as a stop value when looking for a good delta
Boris Feld <boris.feld@octobus.net>
parents: 39496
diff changeset
1416 while candidaterevs is not None:
49226
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48946
diff changeset
1417 dbg_try_rounds += 1
50649
c84cc0ac77e4 delta-fine: use the `_debug_search` attribute directly
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50648
diff changeset
1418 if self._debug_search:
49228
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1419 prev = None
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1420 if deltainfo is not None:
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1421 prev = deltainfo.base
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1422
49608
78ba41878f2e delta-find: add debug information about reuse of cached data
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49228
diff changeset
1423 if (
78ba41878f2e delta-find: add debug information about reuse of cached data
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49228
diff changeset
1424 cachedelta is not None
78ba41878f2e delta-find: add debug information about reuse of cached data
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49228
diff changeset
1425 and len(candidaterevs) == 1
78ba41878f2e delta-find: add debug information about reuse of cached data
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49228
diff changeset
1426 and cachedelta[0] in candidaterevs
78ba41878f2e delta-find: add debug information about reuse of cached data
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49228
diff changeset
1427 ):
78ba41878f2e delta-find: add debug information about reuse of cached data
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49228
diff changeset
1428 round_type = b"cached-delta"
50652
ebb292ffdf4d delta-find: fix `parents` round detection
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50651
diff changeset
1429 elif p1r in candidaterevs or p2r in candidaterevs:
49228
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1430 round_type = b"parents"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1431 elif prev is not None and all(c < prev for c in candidaterevs):
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1432 round_type = b"refine-down"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1433 elif prev is not None and all(c > prev for c in candidaterevs):
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1434 round_type = b"refine-up"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1435 else:
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1436 round_type = b"search-down"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1437 msg = b"DBG-DELTAS-SEARCH: ROUND #%d - %d candidates - %s\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1438 msg %= (dbg_try_rounds, len(candidaterevs), round_type)
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1439 self._write_debug(msg)
35738
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1440 nominateddeltas = []
39498
04b75f3a3f2a snapshot: add refining logic at the findeltainfo level
Boris Feld <boris.feld@octobus.net>
parents: 39497
diff changeset
1441 if deltainfo is not None:
50649
c84cc0ac77e4 delta-fine: use the `_debug_search` attribute directly
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50648
diff changeset
1442 if self._debug_search:
49228
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1443 msg = (
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1444 b"DBG-DELTAS-SEARCH: CONTENDER: rev=%d - length=%d\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1445 )
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1446 msg %= (deltainfo.base, deltainfo.deltalen)
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1447 self._write_debug(msg)
39498
04b75f3a3f2a snapshot: add refining logic at the findeltainfo level
Boris Feld <boris.feld@octobus.net>
parents: 39497
diff changeset
1448 # if we already found a good delta,
04b75f3a3f2a snapshot: add refining logic at the findeltainfo level
Boris Feld <boris.feld@octobus.net>
parents: 39497
diff changeset
1449 # challenge it against refined candidates
04b75f3a3f2a snapshot: add refining logic at the findeltainfo level
Boris Feld <boris.feld@octobus.net>
parents: 39497
diff changeset
1450 nominateddeltas.append(deltainfo)
35738
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1451 for candidaterev in candidaterevs:
50649
c84cc0ac77e4 delta-fine: use the `_debug_search` attribute directly
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50648
diff changeset
1452 if self._debug_search:
49228
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1453 msg = b"DBG-DELTAS-SEARCH: CANDIDATE: rev=%d\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1454 msg %= candidaterev
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1455 self._write_debug(msg)
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1456 candidate_type = None
50652
ebb292ffdf4d delta-find: fix `parents` round detection
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50651
diff changeset
1457 if candidaterev == p1r:
49228
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1458 candidate_type = b"p1"
50652
ebb292ffdf4d delta-find: fix `parents` round detection
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50651
diff changeset
1459 elif candidaterev == p2r:
49228
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1460 candidate_type = b"p2"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1461 elif self.revlog.issnapshot(candidaterev):
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1462 candidate_type = b"snapshot-%d"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1463 candidate_type %= self.revlog.snapshotdepth(
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1464 candidaterev
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1465 )
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1466
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1467 if candidate_type is not None:
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1468 msg = b"DBG-DELTAS-SEARCH: type=%s\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1469 msg %= candidate_type
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1470 self._write_debug(msg)
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1471 msg = b"DBG-DELTAS-SEARCH: size=%d\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1472 msg %= self.revlog.length(candidaterev)
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1473 self._write_debug(msg)
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1474 msg = b"DBG-DELTAS-SEARCH: base=%d\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1475 msg %= self.revlog.deltaparent(candidaterev)
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1476 self._write_debug(msg)
49612
e706bb41fdb3 delta-find: move pre-filtering with other pre-filtering logic
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49611
diff changeset
1477
49226
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48946
diff changeset
1478 dbg_try_count += 1
49228
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1479
50649
c84cc0ac77e4 delta-fine: use the `_debug_search` attribute directly
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50648
diff changeset
1480 if self._debug_search:
49228
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1481 delta_start = util.timer()
50356
2a6949ab9d23 delta-find: add a simple safeguard to prevent bad non-general-delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50355
diff changeset
1482 candidatedelta = self._builddeltainfo(
2a6949ab9d23 delta-find: add a simple safeguard to prevent bad non-general-delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50355
diff changeset
1483 revinfo,
2a6949ab9d23 delta-find: add a simple safeguard to prevent bad non-general-delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50355
diff changeset
1484 candidaterev,
2a6949ab9d23 delta-find: add a simple safeguard to prevent bad non-general-delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50355
diff changeset
1485 target_rev=target_rev,
2a6949ab9d23 delta-find: add a simple safeguard to prevent bad non-general-delta
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50355
diff changeset
1486 )
50649
c84cc0ac77e4 delta-fine: use the `_debug_search` attribute directly
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50648
diff changeset
1487 if self._debug_search:
49228
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1488 delta_end = util.timer()
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1489 msg = b"DBG-DELTAS-SEARCH: delta-search-time=%f\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1490 msg %= delta_end - delta_start
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1491 self._write_debug(msg)
42466
465f2d0df9ae deltas: accept and skip None return for delta info
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42465
diff changeset
1492 if candidatedelta is not None:
49674
5af4a0a73e4c find-delta: rename _isgooddeltainfo
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49657
diff changeset
1493 if is_good_delta_info(self.revlog, candidatedelta, revinfo):
50649
c84cc0ac77e4 delta-fine: use the `_debug_search` attribute directly
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50648
diff changeset
1494 if self._debug_search:
49228
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1495 msg = b"DBG-DELTAS-SEARCH: DELTA: length=%d (GOOD)\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1496 msg %= candidatedelta.deltalen
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1497 self._write_debug(msg)
42466
465f2d0df9ae deltas: accept and skip None return for delta info
Valentin Gatien-Baron <vgatien-baron@janestreet.com>
parents: 42465
diff changeset
1498 nominateddeltas.append(candidatedelta)
50649
c84cc0ac77e4 delta-fine: use the `_debug_search` attribute directly
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50648
diff changeset
1499 elif self._debug_search:
49228
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1500 msg = b"DBG-DELTAS-SEARCH: DELTA: length=%d (BAD)\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1501 msg %= candidatedelta.deltalen
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1502 self._write_debug(msg)
50649
c84cc0ac77e4 delta-fine: use the `_debug_search` attribute directly
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50648
diff changeset
1503 elif self._debug_search:
49228
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1504 msg = b"DBG-DELTAS-SEARCH: NO-DELTA\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1505 self._write_debug(msg)
35738
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1506 if nominateddeltas:
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1507 deltainfo = min(nominateddeltas, key=lambda x: x.deltalen)
39498
04b75f3a3f2a snapshot: add refining logic at the findeltainfo level
Boris Feld <boris.feld@octobus.net>
parents: 39497
diff changeset
1508 if deltainfo is not None:
04b75f3a3f2a snapshot: add refining logic at the findeltainfo level
Boris Feld <boris.feld@octobus.net>
parents: 39497
diff changeset
1509 candidaterevs = groups.send(deltainfo.base)
04b75f3a3f2a snapshot: add refining logic at the findeltainfo level
Boris Feld <boris.feld@octobus.net>
parents: 39497
diff changeset
1510 else:
04b75f3a3f2a snapshot: add refining logic at the findeltainfo level
Boris Feld <boris.feld@octobus.net>
parents: 39497
diff changeset
1511 candidaterevs = next(groups)
35738
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object
Paul Morelle <paul.morelle@octobus.net>
parents: 35737
diff changeset
1512
39333
5d343a24bff5 revlogdeltas: always return a delta info object in finddeltainfo
Boris Feld <boris.feld@octobus.net>
parents: 39332
diff changeset
1513 if deltainfo is None:
49226
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48946
diff changeset
1514 dbg_type = b"full"
51020
509f0f7fc89e delta-computer: stop explicitly taking file handle
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50929
diff changeset
1515 deltainfo = self._fullsnapshotinfo(revinfo, target_rev)
49228
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1516 elif deltainfo.snapshotdepth: # pytype: disable=attribute-error
49226
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48946
diff changeset
1517 dbg_type = b"snapshot"
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48946
diff changeset
1518 else:
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48946
diff changeset
1519 dbg_type = b"delta"
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48946
diff changeset
1520
49610
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
1521 if gather_debug:
49226
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48946
diff changeset
1522 end = util.timer()
49775
d57b966cdeb1 delta-find: properly report full snapshot used from cache as such
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49768
diff changeset
1523 if dbg_type == b'full':
d57b966cdeb1 delta-find: properly report full snapshot used from cache as such
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49768
diff changeset
1524 used_cached = (
d57b966cdeb1 delta-find: properly report full snapshot used from cache as such
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49768
diff changeset
1525 cachedelta is not None
d57b966cdeb1 delta-find: properly report full snapshot used from cache as such
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49768
diff changeset
1526 and dbg_try_rounds == 0
d57b966cdeb1 delta-find: properly report full snapshot used from cache as such
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49768
diff changeset
1527 and dbg_try_count == 0
d57b966cdeb1 delta-find: properly report full snapshot used from cache as such
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49768
diff changeset
1528 and cachedelta[0] == nullrev
d57b966cdeb1 delta-find: properly report full snapshot used from cache as such
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49768
diff changeset
1529 )
d57b966cdeb1 delta-find: properly report full snapshot used from cache as such
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49768
diff changeset
1530 else:
d57b966cdeb1 delta-find: properly report full snapshot used from cache as such
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49768
diff changeset
1531 used_cached = (
d57b966cdeb1 delta-find: properly report full snapshot used from cache as such
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49768
diff changeset
1532 cachedelta is not None
d57b966cdeb1 delta-find: properly report full snapshot used from cache as such
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49768
diff changeset
1533 and dbg_try_rounds == 1
d57b966cdeb1 delta-find: properly report full snapshot used from cache as such
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49768
diff changeset
1534 and dbg_try_count == 1
d57b966cdeb1 delta-find: properly report full snapshot used from cache as such
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49768
diff changeset
1535 and deltainfo.base == cachedelta[0]
d57b966cdeb1 delta-find: properly report full snapshot used from cache as such
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49768
diff changeset
1536 )
50651
d1dc4a03125e delta-find: intrduce a `_one_dbg_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50650
diff changeset
1537 dbg['duration'] = end - start
d1dc4a03125e delta-find: intrduce a `_one_dbg_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50650
diff changeset
1538 dbg[
d1dc4a03125e delta-find: intrduce a `_one_dbg_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50650
diff changeset
1539 'delta-base'
d1dc4a03125e delta-find: intrduce a `_one_dbg_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50650
diff changeset
1540 ] = deltainfo.base # pytype: disable=attribute-error
d1dc4a03125e delta-find: intrduce a `_one_dbg_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50650
diff changeset
1541 dbg['search_round_count'] = dbg_try_rounds
d1dc4a03125e delta-find: intrduce a `_one_dbg_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50650
diff changeset
1542 dbg['using-cached-base'] = used_cached
d1dc4a03125e delta-find: intrduce a `_one_dbg_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50650
diff changeset
1543 dbg['delta_try_count'] = dbg_try_count
d1dc4a03125e delta-find: intrduce a `_one_dbg_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50650
diff changeset
1544 dbg['type'] = dbg_type
49228
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1545 if (
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1546 deltainfo.snapshotdepth # pytype: disable=attribute-error
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1547 is not None
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1548 ):
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1549 dbg[
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1550 'snapshot-depth'
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49226
diff changeset
1551 ] = deltainfo.snapshotdepth # pytype: disable=attribute-error
49226
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48946
diff changeset
1552 else:
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48946
diff changeset
1553 dbg['snapshot-depth'] = 0
50650
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1554 self._dbg_process_data(dbg)
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1555 return deltainfo
49226
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48946
diff changeset
1556
50651
d1dc4a03125e delta-find: intrduce a `_one_dbg_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50650
diff changeset
1557 def _one_dbg_data(self):
d1dc4a03125e delta-find: intrduce a `_one_dbg_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50650
diff changeset
1558 return {
d1dc4a03125e delta-find: intrduce a `_one_dbg_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50650
diff changeset
1559 'duration': None,
d1dc4a03125e delta-find: intrduce a `_one_dbg_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50650
diff changeset
1560 'revision': None,
d1dc4a03125e delta-find: intrduce a `_one_dbg_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50650
diff changeset
1561 'delta-base': None,
d1dc4a03125e delta-find: intrduce a `_one_dbg_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50650
diff changeset
1562 'search_round_count': None,
d1dc4a03125e delta-find: intrduce a `_one_dbg_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50650
diff changeset
1563 'using-cached-base': None,
d1dc4a03125e delta-find: intrduce a `_one_dbg_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50650
diff changeset
1564 'delta_try_count': None,
d1dc4a03125e delta-find: intrduce a `_one_dbg_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50650
diff changeset
1565 'type': None,
d1dc4a03125e delta-find: intrduce a `_one_dbg_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50650
diff changeset
1566 'p1-chain-len': None,
d1dc4a03125e delta-find: intrduce a `_one_dbg_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50650
diff changeset
1567 'p2-chain-len': None,
d1dc4a03125e delta-find: intrduce a `_one_dbg_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50650
diff changeset
1568 'snapshot-depth': None,
d1dc4a03125e delta-find: intrduce a `_one_dbg_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50650
diff changeset
1569 'target-revlog': None,
d1dc4a03125e delta-find: intrduce a `_one_dbg_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50650
diff changeset
1570 }
d1dc4a03125e delta-find: intrduce a `_one_dbg_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50650
diff changeset
1571
50650
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1572 def _dbg_process_data(self, dbg):
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1573 if self._debug_info is not None:
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1574 self._debug_info.append(dbg)
49610
35d4c2124073 debug: add an option to display statistic about a unbundling operation
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 49608
diff changeset
1575
50650
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1576 if self._write_debug is not None:
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1577 msg = (
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1578 b"DBG-DELTAS:"
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1579 b" %-12s"
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1580 b" rev=%d:"
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1581 b" delta-base=%d"
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1582 b" is-cached=%d"
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1583 b" - search-rounds=%d"
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1584 b" try-count=%d"
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1585 b" - delta-type=%-6s"
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1586 b" snap-depth=%d"
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1587 b" - p1-chain-length=%d"
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1588 b" p2-chain-length=%d"
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1589 b" - duration=%f"
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1590 b"\n"
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1591 )
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1592 msg %= (
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1593 dbg["target-revlog"],
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1594 dbg["revision"],
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1595 dbg["delta-base"],
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1596 dbg["using-cached-base"],
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1597 dbg["search_round_count"],
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1598 dbg["delta_try_count"],
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1599 dbg["type"],
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1600 dbg["snapshot-depth"],
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1601 dbg["p1-chain-len"],
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1602 dbg["p2-chain-len"],
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1603 dbg["duration"],
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1604 )
4d84b6d52e93 delta-find: move final debug processing in a `_dbg_process_data` method
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 50649
diff changeset
1605 self._write_debug(msg)
47452
c6844912c327 revlog: factor the logic to determine the delta compression out
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47401
diff changeset
1606
c6844912c327 revlog: factor the logic to determine the delta compression out
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47401
diff changeset
1607
c6844912c327 revlog: factor the logic to determine the delta compression out
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47401
diff changeset
1608 def delta_compression(default_compression_header, deltainfo):
c6844912c327 revlog: factor the logic to determine the delta compression out
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47401
diff changeset
1609 """return (COMPRESSION_MODE, deltainfo)
c6844912c327 revlog: factor the logic to determine the delta compression out
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47401
diff changeset
1610
c6844912c327 revlog: factor the logic to determine the delta compression out
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47401
diff changeset
1611 used by revlog v2+ format to dispatch between PLAIN and DEFAULT
c6844912c327 revlog: factor the logic to determine the delta compression out
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47401
diff changeset
1612 compression.
c6844912c327 revlog: factor the logic to determine the delta compression out
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47401
diff changeset
1613 """
c6844912c327 revlog: factor the logic to determine the delta compression out
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47401
diff changeset
1614 h, d = deltainfo.data
c6844912c327 revlog: factor the logic to determine the delta compression out
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47401
diff changeset
1615 compression_mode = COMP_MODE_INLINE
c6844912c327 revlog: factor the logic to determine the delta compression out
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47401
diff changeset
1616 if not h and not d:
c6844912c327 revlog: factor the logic to determine the delta compression out
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47401
diff changeset
1617 # not data to store at all... declare them uncompressed
c6844912c327 revlog: factor the logic to determine the delta compression out
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47401
diff changeset
1618 compression_mode = COMP_MODE_PLAIN
c6844912c327 revlog: factor the logic to determine the delta compression out
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47401
diff changeset
1619 elif not h:
c6844912c327 revlog: factor the logic to determine the delta compression out
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47401
diff changeset
1620 t = d[0:1]
c6844912c327 revlog: factor the logic to determine the delta compression out
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47401
diff changeset
1621 if t == b'\0':
c6844912c327 revlog: factor the logic to determine the delta compression out
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47401
diff changeset
1622 compression_mode = COMP_MODE_PLAIN
c6844912c327 revlog: factor the logic to determine the delta compression out
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47401
diff changeset
1623 elif t == default_compression_header:
c6844912c327 revlog: factor the logic to determine the delta compression out
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47401
diff changeset
1624 compression_mode = COMP_MODE_DEFAULT
c6844912c327 revlog: factor the logic to determine the delta compression out
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47401
diff changeset
1625 elif h == b'u':
c6844912c327 revlog: factor the logic to determine the delta compression out
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47401
diff changeset
1626 # we have a more efficient way to declare uncompressed
c6844912c327 revlog: factor the logic to determine the delta compression out
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47401
diff changeset
1627 h = b''
c6844912c327 revlog: factor the logic to determine the delta compression out
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47401
diff changeset
1628 compression_mode = COMP_MODE_PLAIN
c6844912c327 revlog: factor the logic to determine the delta compression out
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47401
diff changeset
1629 deltainfo = drop_u_compression(deltainfo)
c6844912c327 revlog: factor the logic to determine the delta compression out
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 47401
diff changeset
1630 return compression_mode, deltainfo