annotate hgext/remotefilelog/datapack.py @ 48875:6000f5b25c9b

py2: remove simple from __future__ statements These were needed for Python 2 support. Now that our linter no longer mandates these, we can start deleting them. Differential Revision: https://phab.mercurial-scm.org/D12254
author Gregory Szorc <gregory.szorc@gmail.com>
date Thu, 03 Mar 2022 17:34:00 +0100
parents d55b71393907
children f254fc73d956
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1 import struct
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2 import zlib
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3
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4 from mercurial.node import (
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5 hex,
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6 sha1nodeconstants,
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7 )
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8 from mercurial.i18n import _
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9 from mercurial import (
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10 pycompat,
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11 util,
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12 )
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13 from . import (
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14 basepack,
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15 constants,
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16 shallowutil,
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17 )
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18
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19 NODELENGTH = 20
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20
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21 # The indicator value in the index for a fulltext entry.
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22 FULLTEXTINDEXMARK = -1
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23 NOBASEINDEXMARK = -2
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24
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25 INDEXSUFFIX = b'.dataidx'
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26 PACKSUFFIX = b'.datapack'
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27
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28
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29 class datapackstore(basepack.basepackstore):
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30 INDEXSUFFIX = INDEXSUFFIX
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31 PACKSUFFIX = PACKSUFFIX
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32
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33 def __init__(self, ui, path):
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34 super(datapackstore, self).__init__(ui, path)
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35
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36 def getpack(self, path):
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37 return datapack(path)
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38
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39 def get(self, name, node):
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40 raise RuntimeError(b"must use getdeltachain with datapackstore")
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41
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42 def getmeta(self, name, node):
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43 for pack in self.packs:
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44 try:
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45 return pack.getmeta(name, node)
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46 except KeyError:
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47 pass
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48
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49 for pack in self.refresh():
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50 try:
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51 return pack.getmeta(name, node)
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52 except KeyError:
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53 pass
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54
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55 raise KeyError((name, hex(node)))
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56
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57 def getdelta(self, name, node):
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58 for pack in self.packs:
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59 try:
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60 return pack.getdelta(name, node)
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61 except KeyError:
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62 pass
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63
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64 for pack in self.refresh():
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65 try:
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66 return pack.getdelta(name, node)
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67 except KeyError:
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68 pass
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69
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70 raise KeyError((name, hex(node)))
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71
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72 def getdeltachain(self, name, node):
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73 for pack in self.packs:
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74 try:
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75 return pack.getdeltachain(name, node)
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76 except KeyError:
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77 pass
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78
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79 for pack in self.refresh():
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80 try:
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81 return pack.getdeltachain(name, node)
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82 except KeyError:
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83 pass
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84
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85 raise KeyError((name, hex(node)))
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86
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87 def add(self, name, node, data):
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88 raise RuntimeError(b"cannot add to datapackstore")
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89
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90
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91 class datapack(basepack.basepack):
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92 INDEXSUFFIX = INDEXSUFFIX
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93 PACKSUFFIX = PACKSUFFIX
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94
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95 # Format is <node><delta offset><pack data offset><pack data size>
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96 # See the mutabledatapack doccomment for more details.
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97 INDEXFORMAT = b'!20siQQ'
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98 INDEXENTRYLENGTH = 40
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99
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100 SUPPORTED_VERSIONS = [2]
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101
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102 def getmissing(self, keys):
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103 missing = []
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104 for name, node in keys:
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105 value = self._find(node)
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106 if not value:
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107 missing.append((name, node))
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108
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109 return missing
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110
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111 def get(self, name, node):
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112 raise RuntimeError(
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113 b"must use getdeltachain with datapack (%s:%s)" % (name, hex(node))
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114 )
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115
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116 def getmeta(self, name, node):
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117 value = self._find(node)
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118 if value is None:
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119 raise KeyError((name, hex(node)))
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120
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121 node, deltabaseoffset, offset, size = value
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122 rawentry = self._data[offset : offset + size]
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123
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124 # see docstring of mutabledatapack for the format
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125 offset = 0
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126 offset += struct.unpack_from(b'!H', rawentry, offset)[0] + 2 # filename
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127 offset += 40 # node, deltabase node
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128 offset += struct.unpack_from(b'!Q', rawentry, offset)[0] + 8 # delta
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129
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130 metalen = struct.unpack_from(b'!I', rawentry, offset)[0]
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131 offset += 4
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132
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133 meta = shallowutil.parsepackmeta(rawentry[offset : offset + metalen])
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134
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135 return meta
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136
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137 def getdelta(self, name, node):
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138 value = self._find(node)
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139 if value is None:
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140 raise KeyError((name, hex(node)))
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141
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142 node, deltabaseoffset, offset, size = value
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143 entry = self._readentry(offset, size, getmeta=True)
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144 filename, node, deltabasenode, delta, meta = entry
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145
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146 # If we've read a lot of data from the mmap, free some memory.
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147 self.freememory()
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148
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149 return delta, filename, deltabasenode, meta
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150
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151 def getdeltachain(self, name, node):
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152 value = self._find(node)
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153 if value is None:
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154 raise KeyError((name, hex(node)))
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155
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156 params = self.params
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157
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158 # Precompute chains
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159 chain = [value]
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160 deltabaseoffset = value[1]
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161 entrylen = self.INDEXENTRYLENGTH
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162 while (
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163 deltabaseoffset != FULLTEXTINDEXMARK
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164 and deltabaseoffset != NOBASEINDEXMARK
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165 ):
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166 loc = params.indexstart + deltabaseoffset
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167 value = struct.unpack(
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168 self.INDEXFORMAT, self._index[loc : loc + entrylen]
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169 )
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170 deltabaseoffset = value[1]
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171 chain.append(value)
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172
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173 # Read chain data
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174 deltachain = []
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175 for node, deltabaseoffset, offset, size in chain:
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176 filename, node, deltabasenode, delta = self._readentry(offset, size)
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177 deltachain.append((filename, node, filename, deltabasenode, delta))
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178
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179 # If we've read a lot of data from the mmap, free some memory.
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180 self.freememory()
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181
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182 return deltachain
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183
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184 def _readentry(self, offset, size, getmeta=False):
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185 rawentry = self._data[offset : offset + size]
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186 self._pagedin += len(rawentry)
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187
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188 # <2 byte len> + <filename>
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189 lengthsize = 2
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190 filenamelen = struct.unpack(b'!H', rawentry[:2])[0]
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191 filename = rawentry[lengthsize : lengthsize + filenamelen]
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192
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193 # <20 byte node> + <20 byte deltabase>
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194 nodestart = lengthsize + filenamelen
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195 deltabasestart = nodestart + NODELENGTH
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196 node = rawentry[nodestart:deltabasestart]
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197 deltabasenode = rawentry[deltabasestart : deltabasestart + NODELENGTH]
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198
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199 # <8 byte len> + <delta>
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200 deltastart = deltabasestart + NODELENGTH
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201 rawdeltalen = rawentry[deltastart : deltastart + 8]
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202 deltalen = struct.unpack(b'!Q', rawdeltalen)[0]
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203
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204 delta = rawentry[deltastart + 8 : deltastart + 8 + deltalen]
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205 delta = self._decompress(delta)
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206
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207 if getmeta:
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208 metastart = deltastart + 8 + deltalen
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209 metalen = struct.unpack_from(b'!I', rawentry, metastart)[0]
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210
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211 rawmeta = rawentry[metastart + 4 : metastart + 4 + metalen]
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212 meta = shallowutil.parsepackmeta(rawmeta)
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213 return filename, node, deltabasenode, delta, meta
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214 else:
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215 return filename, node, deltabasenode, delta
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216
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217 def _decompress(self, data):
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218 return zlib.decompress(data)
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219
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220 def add(self, name, node, data):
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221 raise RuntimeError(b"cannot add to datapack (%s:%s)" % (name, node))
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222
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223 def _find(self, node):
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224 params = self.params
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225 fanoutkey = struct.unpack(
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226 params.fanoutstruct, node[: params.fanoutprefix]
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227 )[0]
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228 fanout = self._fanouttable
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229
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230 start = fanout[fanoutkey] + params.indexstart
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231 indexend = self._indexend
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232
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233 # Scan forward to find the first non-same entry, which is the upper
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234 # bound.
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235 for i in pycompat.xrange(fanoutkey + 1, params.fanoutcount):
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236 end = fanout[i] + params.indexstart
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237 if end != start:
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238 break
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239 else:
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240 end = indexend
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241
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242 # Bisect between start and end to find node
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243 index = self._index
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244 startnode = index[start : start + NODELENGTH]
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245 endnode = index[end : end + NODELENGTH]
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246 entrylen = self.INDEXENTRYLENGTH
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247 if startnode == node:
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248 entry = index[start : start + entrylen]
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249 elif endnode == node:
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250 entry = index[end : end + entrylen]
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251 else:
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252 while start < end - entrylen:
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253 mid = start + (end - start) // 2
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254 mid = mid - ((mid - params.indexstart) % entrylen)
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255 midnode = index[mid : mid + NODELENGTH]
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256 if midnode == node:
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257 entry = index[mid : mid + entrylen]
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258 break
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259 if node > midnode:
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260 start = mid
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261 elif node < midnode:
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262 end = mid
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263 else:
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264 return None
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265
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266 return struct.unpack(self.INDEXFORMAT, entry)
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267
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268 def markledger(self, ledger, options=None):
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269 for filename, node in self:
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270 ledger.markdataentry(self, filename, node)
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271
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272 def cleanup(self, ledger):
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273 entries = ledger.sources.get(self, [])
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274 allkeys = set(self)
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275 repackedkeys = {
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276 (e.filename, e.node) for e in entries if e.datarepacked or e.gced
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277 }
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278
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279 if len(allkeys - repackedkeys) == 0:
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280 if self.path not in ledger.created:
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281 util.unlinkpath(self.indexpath, ignoremissing=True)
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282 util.unlinkpath(self.packpath, ignoremissing=True)
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283
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284 def __iter__(self):
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285 for f, n, deltabase, deltalen in self.iterentries():
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286 yield f, n
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287
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288 def iterentries(self):
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289 # Start at 1 to skip the header
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290 offset = 1
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291 data = self._data
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292 while offset < self.datasize:
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293 oldoffset = offset
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294
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295 # <2 byte len> + <filename>
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296 filenamelen = struct.unpack(b'!H', data[offset : offset + 2])[0]
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297 offset += 2
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298 filename = data[offset : offset + filenamelen]
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299 offset += filenamelen
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300
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301 # <20 byte node>
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302 node = data[offset : offset + constants.NODESIZE]
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303 offset += constants.NODESIZE
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304 # <20 byte deltabase>
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305 deltabase = data[offset : offset + constants.NODESIZE]
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306 offset += constants.NODESIZE
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307
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308 # <8 byte len> + <delta>
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309 rawdeltalen = data[offset : offset + 8]
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310 deltalen = struct.unpack(b'!Q', rawdeltalen)[0]
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311 offset += 8
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diff changeset
312
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313 # TODO(augie): we should store a header that is the
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314 # uncompressed size.
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315 uncompressedlen = len(
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316 self._decompress(data[offset : offset + deltalen])
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317 )
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318 offset += deltalen
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diff changeset
319
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320 # <4 byte len> + <metadata-list>
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diff changeset
321 metalen = struct.unpack_from(b'!I', data, offset)[0]
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322 offset += 4 + metalen
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323
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diff changeset
324 yield (filename, node, deltabase, uncompressedlen)
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diff changeset
325
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diff changeset
326 # If we've read a lot of data from the mmap, free some memory.
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diff changeset
327 self._pagedin += offset - oldoffset
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parents:
diff changeset
328 if self.freememory():
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parents:
diff changeset
329 data = self._data
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330
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331
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diff changeset
332 class mutabledatapack(basepack.mutablebasepack):
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parents:
diff changeset
333 """A class for constructing and serializing a datapack file and index.
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parents:
diff changeset
334
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parents:
diff changeset
335 A datapack is a pair of files that contain the revision contents for various
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parents:
diff changeset
336 file revisions in Mercurial. It contains only revision contents (like file
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parents:
diff changeset
337 contents), not any history information.
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parents:
diff changeset
338
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diff changeset
339 It consists of two files, with the following format. All bytes are in
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Augie Fackler <augie@google.com>
parents:
diff changeset
340 network byte order (big endian).
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341
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parents:
diff changeset
342 .datapack
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parents:
diff changeset
343 The pack itself is a series of revision deltas with some basic header
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parents:
diff changeset
344 information on each. A revision delta may be a fulltext, represented by
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parents:
diff changeset
345 a deltabasenode equal to the nullid.
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parents:
diff changeset
346
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Augie Fackler <augie@google.com>
parents:
diff changeset
347 datapack = <version: 1 byte>
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Augie Fackler <augie@google.com>
parents:
diff changeset
348 [<revision>,...]
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parents:
diff changeset
349 revision = <filename len: 2 byte unsigned int>
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parents:
diff changeset
350 <filename>
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Augie Fackler <augie@google.com>
parents:
diff changeset
351 <node: 20 byte>
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parents:
diff changeset
352 <deltabasenode: 20 byte>
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parents:
diff changeset
353 <delta len: 8 byte unsigned int>
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parents:
diff changeset
354 <delta>
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Augie Fackler <augie@google.com>
parents:
diff changeset
355 <metadata-list len: 4 byte unsigned int> [1]
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parents:
diff changeset
356 <metadata-list> [1]
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parents:
diff changeset
357 metadata-list = [<metadata-item>, ...]
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parents:
diff changeset
358 metadata-item = <metadata-key: 1 byte>
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parents:
diff changeset
359 <metadata-value len: 2 byte unsigned>
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parents:
diff changeset
360 <metadata-value>
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Augie Fackler <augie@google.com>
parents:
diff changeset
361
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Augie Fackler <augie@google.com>
parents:
diff changeset
362 metadata-key could be METAKEYFLAG or METAKEYSIZE or other single byte
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Augie Fackler <augie@google.com>
parents:
diff changeset
363 value in the future.
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Augie Fackler <augie@google.com>
parents:
diff changeset
364
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Augie Fackler <augie@google.com>
parents:
diff changeset
365 .dataidx
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Augie Fackler <augie@google.com>
parents:
diff changeset
366 The index file consists of two parts, the fanout and the index.
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parents:
diff changeset
367
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parents:
diff changeset
368 The index is a list of index entries, sorted by node (one per revision
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parents:
diff changeset
369 in the pack). Each entry has:
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parents:
diff changeset
370
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Augie Fackler <augie@google.com>
parents:
diff changeset
371 - node (The 20 byte node of the entry; i.e. the commit hash, file node
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Augie Fackler <augie@google.com>
parents:
diff changeset
372 hash, etc)
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Augie Fackler <augie@google.com>
parents:
diff changeset
373 - deltabase index offset (The location in the index of the deltabase for
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parents:
diff changeset
374 this entry. The deltabase is the next delta in
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parents:
diff changeset
375 the chain, with the chain eventually
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parents:
diff changeset
376 terminating in a full-text, represented by a
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parents:
diff changeset
377 deltabase offset of -1. This lets us compute
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Augie Fackler <augie@google.com>
parents:
diff changeset
378 delta chains from the index, then do
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Augie Fackler <augie@google.com>
parents:
diff changeset
379 sequential reads from the pack if the revision
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Augie Fackler <augie@google.com>
parents:
diff changeset
380 are nearby on disk.)
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Augie Fackler <augie@google.com>
parents:
diff changeset
381 - pack entry offset (The location of this entry in the datapack)
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Augie Fackler <augie@google.com>
parents:
diff changeset
382 - pack content size (The on-disk length of this entry's pack data)
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Augie Fackler <augie@google.com>
parents:
diff changeset
383
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Augie Fackler <augie@google.com>
parents:
diff changeset
384 The fanout is a quick lookup table to reduce the number of steps for
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Augie Fackler <augie@google.com>
parents:
diff changeset
385 bisecting the index. It is a series of 4 byte pointers to positions
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Augie Fackler <augie@google.com>
parents:
diff changeset
386 within the index. It has 2^16 entries, which corresponds to hash
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Augie Fackler <augie@google.com>
parents:
diff changeset
387 prefixes [0000, 0001,..., FFFE, FFFF]. Example: the pointer in slot
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Augie Fackler <augie@google.com>
parents:
diff changeset
388 4F0A points to the index position of the first revision whose node
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Augie Fackler <augie@google.com>
parents:
diff changeset
389 starts with 4F0A. This saves log(2^16)=16 bisect steps.
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Augie Fackler <augie@google.com>
parents:
diff changeset
390
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Augie Fackler <augie@google.com>
parents:
diff changeset
391 dataidx = <fanouttable>
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Augie Fackler <augie@google.com>
parents:
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392 <index>
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Augie Fackler <augie@google.com>
parents:
diff changeset
393 fanouttable = [<index offset: 4 byte unsigned int>,...] (2^16 entries)
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Augie Fackler <augie@google.com>
parents:
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394 index = [<index entry>,...]
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Augie Fackler <augie@google.com>
parents:
diff changeset
395 indexentry = <node: 20 byte>
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Augie Fackler <augie@google.com>
parents:
diff changeset
396 <deltabase location: 4 byte signed int>
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Augie Fackler <augie@google.com>
parents:
diff changeset
397 <pack entry offset: 8 byte unsigned int>
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Augie Fackler <augie@google.com>
parents:
diff changeset
398 <pack entry size: 8 byte unsigned int>
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Augie Fackler <augie@google.com>
parents:
diff changeset
399
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Augie Fackler <augie@google.com>
parents:
diff changeset
400 [1]: new in version 1.
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Augie Fackler <augie@google.com>
parents:
diff changeset
401 """
43076
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parents: 41527
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402
40495
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Augie Fackler <augie@google.com>
parents:
diff changeset
403 INDEXSUFFIX = INDEXSUFFIX
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Augie Fackler <augie@google.com>
parents:
diff changeset
404 PACKSUFFIX = PACKSUFFIX
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Augie Fackler <augie@google.com>
parents:
diff changeset
405
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Augie Fackler <augie@google.com>
parents:
diff changeset
406 # v[01] index format: <node><delta offset><pack data offset><pack data size>
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Augie Fackler <augie@google.com>
parents:
diff changeset
407 INDEXFORMAT = datapack.INDEXFORMAT
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Augie Fackler <augie@google.com>
parents:
diff changeset
408 INDEXENTRYLENGTH = datapack.INDEXENTRYLENGTH
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Augie Fackler <augie@google.com>
parents:
diff changeset
409
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Augie Fackler <augie@google.com>
parents:
diff changeset
410 # v1 has metadata support
40506
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Augie Fackler <augie@google.com>
parents: 40495
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411 SUPPORTED_VERSIONS = [2]
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Augie Fackler <augie@google.com>
parents:
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412
40507
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Augie Fackler <augie@google.com>
parents: 40506
diff changeset
413 def _compress(self, data):
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Augie Fackler <augie@google.com>
parents: 40506
diff changeset
414 return zlib.compress(data)
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Augie Fackler <augie@google.com>
parents: 40506
diff changeset
415
40495
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Augie Fackler <augie@google.com>
parents:
diff changeset
416 def add(self, name, node, deltabasenode, delta, metadata=None):
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Augie Fackler <augie@google.com>
parents:
diff changeset
417 # metadata is a dict, ex. {METAKEYFLAG: flag}
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parents: 41527
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418 if len(name) > 2 ** 16:
43077
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parents: 43076
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419 raise RuntimeError(_(b"name too long %s") % name)
40495
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Augie Fackler <augie@google.com>
parents:
diff changeset
420 if len(node) != 20:
43077
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parents: 43076
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421 raise RuntimeError(_(b"node should be 20 bytes %s") % node)
40495
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Augie Fackler <augie@google.com>
parents:
diff changeset
422
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Augie Fackler <augie@google.com>
parents:
diff changeset
423 if node in self.entries:
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Augie Fackler <augie@google.com>
parents:
diff changeset
424 # The revision has already been added
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
425 return
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
426
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
427 # TODO: allow configurable compression
40507
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Augie Fackler <augie@google.com>
parents: 40506
diff changeset
428 delta = self._compress(delta)
40495
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Augie Fackler <augie@google.com>
parents:
diff changeset
429
43077
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Augie Fackler <augie@google.com>
parents: 43076
diff changeset
430 rawdata = b''.join(
43076
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Augie Fackler <augie@google.com>
parents: 41527
diff changeset
431 (
43077
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Augie Fackler <augie@google.com>
parents: 43076
diff changeset
432 struct.pack(b'!H', len(name)), # unsigned 2 byte int
43076
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Augie Fackler <augie@google.com>
parents: 41527
diff changeset
433 name,
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 41527
diff changeset
434 node,
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Augie Fackler <augie@google.com>
parents: 41527
diff changeset
435 deltabasenode,
43077
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Augie Fackler <augie@google.com>
parents: 43076
diff changeset
436 struct.pack(b'!Q', len(delta)), # unsigned 8 byte int
43076
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Augie Fackler <augie@google.com>
parents: 41527
diff changeset
437 delta,
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Augie Fackler <augie@google.com>
parents: 41527
diff changeset
438 )
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 41527
diff changeset
439 )
40495
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
440
40506
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Augie Fackler <augie@google.com>
parents: 40495
diff changeset
441 # v1 support metadata
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Augie Fackler <augie@google.com>
parents: 40495
diff changeset
442 rawmeta = shallowutil.buildpackmeta(metadata)
43077
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Augie Fackler <augie@google.com>
parents: 43076
diff changeset
443 rawdata += struct.pack(b'!I', len(rawmeta)) # unsigned 4 byte
40506
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Augie Fackler <augie@google.com>
parents: 40495
diff changeset
444 rawdata += rawmeta
40495
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
445
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
446 offset = self.packfp.tell()
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
447
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
448 size = len(rawdata)
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
449
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
450 self.entries[node] = (deltabasenode, offset, size)
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Augie Fackler <augie@google.com>
parents:
diff changeset
451
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
452 self.writeraw(rawdata)
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
453
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
454 def createindex(self, nodelocations, indexoffset):
43076
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Augie Fackler <augie@google.com>
parents: 41527
diff changeset
455 entries = sorted(
43105
649d3ac37a12 py3: define and use pycompat.iteritems() for hgext/
Gregory Szorc <gregory.szorc@gmail.com>
parents: 43077
diff changeset
456 (n, db, o, s) for n, (db, o, s) in pycompat.iteritems(self.entries)
43076
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Augie Fackler <augie@google.com>
parents: 41527
diff changeset
457 )
40495
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
458
43077
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Augie Fackler <augie@google.com>
parents: 43076
diff changeset
459 rawindex = b''
40495
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
460 fmt = self.INDEXFORMAT
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
461 for node, deltabase, offset, size in entries:
47012
d55b71393907 node: replace nullid and friends with nodeconstants class
Joerg Sonnenberger <joerg@bec.de>
parents: 44452
diff changeset
462 if deltabase == sha1nodeconstants.nullid:
40495
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
463 deltabaselocation = FULLTEXTINDEXMARK
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
464 else:
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
465 # Instead of storing the deltabase node in the index, let's
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
466 # store a pointer directly to the index entry for the deltabase.
43076
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Augie Fackler <augie@google.com>
parents: 41527
diff changeset
467 deltabaselocation = nodelocations.get(
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Augie Fackler <augie@google.com>
parents: 41527
diff changeset
468 deltabase, NOBASEINDEXMARK
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 41527
diff changeset
469 )
40495
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
470
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
471 entry = struct.pack(fmt, node, deltabaselocation, offset, size)
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
472 rawindex += entry
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
473
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
474 return rawindex