Mercurial > hg
annotate hgext/remotefilelog/contentstore.py @ 47859:155a2ec8a9dc
merge with stable
author | Matt Harbison <matt_harbison@yahoo.com> |
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date | Sun, 22 Aug 2021 16:32:06 -0400 |
parents | 8d3c2f9d4af7 |
children | 2174f54aab18 |
rev | line source |
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1 from __future__ import absolute_import |
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2 |
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3 import threading |
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4 |
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5 from mercurial.node import ( |
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6 hex, |
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7 sha1nodeconstants, |
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8 ) |
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9 from mercurial.pycompat import getattr |
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10 from mercurial import ( |
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11 mdiff, |
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12 pycompat, |
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13 revlog, |
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14 ) |
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15 from . import ( |
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16 basestore, |
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17 constants, |
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18 shallowutil, |
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19 ) |
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20 |
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21 |
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22 class ChainIndicies(object): |
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23 """A static class for easy reference to the delta chain indicies.""" |
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24 |
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25 # The filename of this revision delta |
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26 NAME = 0 |
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27 # The mercurial file node for this revision delta |
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28 NODE = 1 |
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29 # The filename of the delta base's revision. This is useful when delta |
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30 # between different files (like in the case of a move or copy, we can delta |
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31 # against the original file content). |
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32 BASENAME = 2 |
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33 # The mercurial file node for the delta base revision. This is the nullid if |
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34 # this delta is a full text. |
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35 BASENODE = 3 |
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36 # The actual delta or full text data. |
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37 DATA = 4 |
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38 |
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39 |
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40 class unioncontentstore(basestore.baseunionstore): |
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41 def __init__(self, *args, **kwargs): |
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42 super(unioncontentstore, self).__init__(*args, **kwargs) |
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43 |
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44 self.stores = args |
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45 self.writestore = kwargs.get('writestore') |
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46 |
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47 # If allowincomplete==True then the union store can return partial |
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48 # delta chains, otherwise it will throw a KeyError if a full |
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49 # deltachain can't be found. |
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50 self.allowincomplete = kwargs.get('allowincomplete', False) |
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51 |
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52 def get(self, name, node): |
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53 """Fetches the full text revision contents of the given name+node pair. |
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54 If the full text doesn't exist, throws a KeyError. |
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55 |
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56 Under the hood, this uses getdeltachain() across all the stores to build |
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57 up a full chain to produce the full text. |
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58 """ |
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59 chain = self.getdeltachain(name, node) |
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60 |
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61 if chain[-1][ChainIndicies.BASENODE] != sha1nodeconstants.nullid: |
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62 # If we didn't receive a full chain, throw |
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63 raise KeyError((name, hex(node))) |
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64 |
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65 # The last entry in the chain is a full text, so we start our delta |
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66 # applies with that. |
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67 fulltext = chain.pop()[ChainIndicies.DATA] |
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68 |
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69 text = fulltext |
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70 while chain: |
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71 delta = chain.pop()[ChainIndicies.DATA] |
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72 text = mdiff.patches(text, [delta]) |
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73 |
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74 return text |
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75 |
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76 @basestore.baseunionstore.retriable |
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77 def getdelta(self, name, node): |
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78 """Return the single delta entry for the given name/node pair.""" |
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79 for store in self.stores: |
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80 try: |
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81 return store.getdelta(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 getdeltachain(self, name, node): |
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88 """Returns the deltachain for the given name/node pair. |
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89 |
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90 Returns an ordered list of: |
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91 |
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92 [(name, node, deltabasename, deltabasenode, deltacontent),...] |
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93 |
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94 where the chain is terminated by a full text entry with a nullid |
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95 deltabasenode. |
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96 """ |
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97 chain = self._getpartialchain(name, node) |
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98 while chain[-1][ChainIndicies.BASENODE] != sha1nodeconstants.nullid: |
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99 x, x, deltabasename, deltabasenode, x = chain[-1] |
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100 try: |
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101 morechain = self._getpartialchain(deltabasename, deltabasenode) |
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102 chain.extend(morechain) |
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103 except KeyError: |
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104 # If we allow incomplete chains, don't throw. |
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105 if not self.allowincomplete: |
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106 raise |
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107 break |
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108 |
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109 return chain |
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110 |
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111 @basestore.baseunionstore.retriable |
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112 def getmeta(self, name, node): |
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113 """Returns the metadata dict for given node.""" |
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114 for store in self.stores: |
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115 try: |
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116 return store.getmeta(name, node) |
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117 except KeyError: |
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118 pass |
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119 raise KeyError((name, hex(node))) |
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120 |
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121 def getmetrics(self): |
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122 metrics = [s.getmetrics() for s in self.stores] |
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123 return shallowutil.sumdicts(*metrics) |
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124 |
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125 @basestore.baseunionstore.retriable |
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126 def _getpartialchain(self, name, node): |
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127 """Returns a partial delta chain for the given name/node pair. |
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128 |
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129 A partial chain is a chain that may not be terminated in a full-text. |
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130 """ |
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131 for store in self.stores: |
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132 try: |
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133 return store.getdeltachain(name, node) |
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134 except KeyError: |
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135 pass |
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136 |
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137 raise KeyError((name, hex(node))) |
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138 |
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139 def add(self, name, node, data): |
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140 raise RuntimeError( |
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141 b"cannot add content only to remotefilelog contentstore" |
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142 ) |
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143 |
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144 def getmissing(self, keys): |
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145 missing = keys |
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146 for store in self.stores: |
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147 if missing: |
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148 missing = store.getmissing(missing) |
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149 return missing |
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150 |
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151 def addremotefilelognode(self, name, node, data): |
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152 if self.writestore: |
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153 self.writestore.addremotefilelognode(name, node, data) |
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154 else: |
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155 raise RuntimeError(b"no writable store configured") |
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156 |
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157 def markledger(self, ledger, options=None): |
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158 for store in self.stores: |
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159 store.markledger(ledger, options) |
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160 |
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161 |
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162 class remotefilelogcontentstore(basestore.basestore): |
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163 def __init__(self, *args, **kwargs): |
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164 super(remotefilelogcontentstore, self).__init__(*args, **kwargs) |
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165 self._threaddata = threading.local() |
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166 |
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167 def get(self, name, node): |
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168 # return raw revision text |
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169 data = self._getdata(name, node) |
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170 |
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171 offset, size, flags = shallowutil.parsesizeflags(data) |
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172 content = data[offset : offset + size] |
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173 |
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174 ancestormap = shallowutil.ancestormap(data) |
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175 p1, p2, linknode, copyfrom = ancestormap[node] |
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176 copyrev = None |
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177 if copyfrom: |
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178 copyrev = hex(p1) |
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179 |
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180 self._updatemetacache(node, size, flags) |
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181 |
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182 # lfs tracks renames in its own metadata, remove hg copy metadata, |
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183 # because copy metadata will be re-added by lfs flag processor. |
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184 if flags & revlog.REVIDX_EXTSTORED: |
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185 copyrev = copyfrom = None |
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186 revision = shallowutil.createrevlogtext(content, copyfrom, copyrev) |
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187 return revision |
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188 |
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189 def getdelta(self, name, node): |
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190 # Since remotefilelog content stores only contain full texts, just |
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191 # return that. |
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192 revision = self.get(name, node) |
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193 return ( |
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194 revision, |
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195 name, |
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196 sha1nodeconstants.nullid, |
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197 self.getmeta(name, node), |
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198 ) |
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199 |
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200 def getdeltachain(self, name, node): |
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201 # Since remotefilelog content stores just contain full texts, we return |
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202 # a fake delta chain that just consists of a single full text revision. |
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203 # The nullid in the deltabasenode slot indicates that the revision is a |
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204 # fulltext. |
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205 revision = self.get(name, node) |
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206 return [(name, node, None, sha1nodeconstants.nullid, revision)] |
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207 |
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208 def getmeta(self, name, node): |
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209 self._sanitizemetacache() |
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210 if node != self._threaddata.metacache[0]: |
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211 data = self._getdata(name, node) |
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212 offset, size, flags = shallowutil.parsesizeflags(data) |
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213 self._updatemetacache(node, size, flags) |
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214 return self._threaddata.metacache[1] |
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215 |
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216 def add(self, name, node, data): |
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217 raise RuntimeError( |
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218 b"cannot add content only to remotefilelog contentstore" |
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219 ) |
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220 |
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221 def _sanitizemetacache(self): |
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222 metacache = getattr(self._threaddata, 'metacache', None) |
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223 if metacache is None: |
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224 self._threaddata.metacache = (None, None) # (node, meta) |
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225 |
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226 def _updatemetacache(self, node, size, flags): |
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227 self._sanitizemetacache() |
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228 if node == self._threaddata.metacache[0]: |
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229 return |
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230 meta = {constants.METAKEYFLAG: flags, constants.METAKEYSIZE: size} |
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231 self._threaddata.metacache = (node, meta) |
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232 |
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233 |
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234 class remotecontentstore(object): |
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235 def __init__(self, ui, fileservice, shared): |
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236 self._fileservice = fileservice |
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237 # type(shared) is usually remotefilelogcontentstore |
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238 self._shared = shared |
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239 |
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240 def get(self, name, node): |
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241 self._fileservice.prefetch( |
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242 [(name, hex(node))], force=True, fetchdata=True |
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243 ) |
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244 return self._shared.get(name, node) |
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245 |
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246 def getdelta(self, name, node): |
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247 revision = self.get(name, node) |
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248 return ( |
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249 revision, |
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250 name, |
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251 sha1nodeconstants.nullid, |
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252 self._shared.getmeta(name, node), |
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253 ) |
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254 |
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255 def getdeltachain(self, name, node): |
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256 # Since our remote content stores just contain full texts, we return a |
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257 # fake delta chain that just consists of a single full text revision. |
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258 # The nullid in the deltabasenode slot indicates that the revision is a |
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259 # fulltext. |
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260 revision = self.get(name, node) |
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261 return [(name, node, None, sha1nodeconstants.nullid, revision)] |
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262 |
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263 def getmeta(self, name, node): |
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264 self._fileservice.prefetch( |
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265 [(name, hex(node))], force=True, fetchdata=True |
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266 ) |
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267 return self._shared.getmeta(name, node) |
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268 |
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269 def add(self, name, node, data): |
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270 raise RuntimeError(b"cannot add to a remote store") |
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271 |
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272 def getmissing(self, keys): |
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273 return keys |
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274 |
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275 def markledger(self, ledger, options=None): |
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276 pass |
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277 |
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278 |
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279 class manifestrevlogstore(object): |
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280 def __init__(self, repo): |
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281 self._store = repo.store |
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282 self._svfs = repo.svfs |
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283 self._revlogs = dict() |
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284 self._cl = revlog.revlog(self._svfs, radix=b'00changelog.i') |
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285 self._repackstartlinkrev = 0 |
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286 |
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287 def get(self, name, node): |
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288 return self._revlog(name).rawdata(node) |
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289 |
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290 def getdelta(self, name, node): |
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291 revision = self.get(name, node) |
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292 return revision, name, self._cl.nullid, self.getmeta(name, node) |
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293 |
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294 def getdeltachain(self, name, node): |
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295 revision = self.get(name, node) |
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296 return [(name, node, None, self._cl.nullid, revision)] |
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297 |
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298 def getmeta(self, name, node): |
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299 rl = self._revlog(name) |
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300 rev = rl.rev(node) |
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301 return { |
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302 constants.METAKEYFLAG: rl.flags(rev), |
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303 constants.METAKEYSIZE: rl.rawsize(rev), |
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304 } |
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305 |
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306 def getancestors(self, name, node, known=None): |
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307 if known is None: |
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308 known = set() |
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309 if node in known: |
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310 return [] |
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311 |
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312 rl = self._revlog(name) |
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313 ancestors = {} |
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314 missing = {node} |
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315 for ancrev in rl.ancestors([rl.rev(node)], inclusive=True): |
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316 ancnode = rl.node(ancrev) |
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317 missing.discard(ancnode) |
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318 |
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319 p1, p2 = rl.parents(ancnode) |
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320 if p1 != self._cl.nullid and p1 not in known: |
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321 missing.add(p1) |
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322 if p2 != self._cl.nullid and p2 not in known: |
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323 missing.add(p2) |
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324 |
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325 linknode = self._cl.node(rl.linkrev(ancrev)) |
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326 ancestors[rl.node(ancrev)] = (p1, p2, linknode, b'') |
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327 if not missing: |
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328 break |
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329 return ancestors |
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330 |
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331 def getnodeinfo(self, name, node): |
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332 cl = self._cl |
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333 rl = self._revlog(name) |
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334 parents = rl.parents(node) |
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335 linkrev = rl.linkrev(rl.rev(node)) |
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336 return (parents[0], parents[1], cl.node(linkrev), None) |
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337 |
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338 def add(self, *args): |
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339 raise RuntimeError(b"cannot add to a revlog store") |
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340 |
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341 def _revlog(self, name): |
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342 rl = self._revlogs.get(name) |
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343 if rl is None: |
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344 revlogname = b'00manifesttree' |
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345 if name != b'': |
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346 revlogname = b'meta/%s/00manifest' % name |
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347 rl = revlog.revlog(self._svfs, radix=revlogname) |
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348 self._revlogs[name] = rl |
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349 return rl |
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350 |
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351 def getmissing(self, keys): |
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352 missing = [] |
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353 for name, node in keys: |
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354 mfrevlog = self._revlog(name) |
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355 if node not in mfrevlog.nodemap: |
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356 missing.append((name, node)) |
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357 |
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358 return missing |
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359 |
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360 def setrepacklinkrevrange(self, startrev, endrev): |
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361 self._repackstartlinkrev = startrev |
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362 self._repackendlinkrev = endrev |
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363 |
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364 def markledger(self, ledger, options=None): |
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365 if options and options.get(constants.OPTION_PACKSONLY): |
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366 return |
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367 treename = b'' |
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368 rl = revlog.revlog(self._svfs, radix=b'00manifesttree') |
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369 startlinkrev = self._repackstartlinkrev |
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370 endlinkrev = self._repackendlinkrev |
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371 for rev in pycompat.xrange(len(rl) - 1, -1, -1): |
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372 linkrev = rl.linkrev(rev) |
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373 if linkrev < startlinkrev: |
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374 break |
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375 if linkrev > endlinkrev: |
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376 continue |
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377 node = rl.node(rev) |
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378 ledger.markdataentry(self, treename, node) |
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379 ledger.markhistoryentry(self, treename, node) |
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380 |
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381 for t, path, encoded, size in self._store.datafiles(): |
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382 if path[:5] != b'meta/' or path[-2:] != b'.i': |
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383 continue |
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384 |
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385 treename = path[5 : -len(b'/00manifest')] |
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386 |
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387 rl = revlog.revlog(self._svfs, indexfile=path[:-2]) |
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388 for rev in pycompat.xrange(len(rl) - 1, -1, -1): |
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389 linkrev = rl.linkrev(rev) |
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390 if linkrev < startlinkrev: |
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391 break |
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392 if linkrev > endlinkrev: |
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393 continue |
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394 node = rl.node(rev) |
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395 ledger.markdataentry(self, treename, node) |
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396 ledger.markhistoryentry(self, treename, node) |
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397 |
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398 def cleanup(self, ledger): |
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399 pass |