Mercurial > hg
annotate hgext/remotefilelog/contentstore.py @ 41809:e0a3ee3fdb33
tests: add more wildcards to test-extdiff.t
This test has been flakey recently on Windows, but it appears to be the same
scenario as 88d4477ac4f6.
author | Matt Harbison <matt_harbison@yahoo.com> |
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date | Mon, 25 Feb 2019 21:10:16 -0500 |
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children | fdeb4c1d23d5 |
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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 hex, nullid |
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6 from mercurial import ( |
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7 mdiff, |
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8 pycompat, |
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9 revlog, |
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10 ) |
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11 from . import ( |
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12 basestore, |
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13 constants, |
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14 shallowutil, |
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15 ) |
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16 |
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17 class ChainIndicies(object): |
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18 """A static class for easy reference to the delta chain indicies. |
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19 """ |
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20 # The filename of this revision delta |
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21 NAME = 0 |
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22 # The mercurial file node for this revision delta |
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23 NODE = 1 |
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24 # The filename of the delta base's revision. This is useful when delta |
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25 # between different files (like in the case of a move or copy, we can delta |
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26 # against the original file content). |
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27 BASENAME = 2 |
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28 # The mercurial file node for the delta base revision. This is the nullid if |
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29 # this delta is a full text. |
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30 BASENODE = 3 |
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31 # The actual delta or full text data. |
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32 DATA = 4 |
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33 |
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34 class unioncontentstore(basestore.baseunionstore): |
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35 def __init__(self, *args, **kwargs): |
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36 super(unioncontentstore, self).__init__(*args, **kwargs) |
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37 |
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38 self.stores = args |
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39 self.writestore = kwargs.get(r'writestore') |
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40 |
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41 # If allowincomplete==True then the union store can return partial |
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42 # delta chains, otherwise it will throw a KeyError if a full |
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43 # deltachain can't be found. |
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44 self.allowincomplete = kwargs.get(r'allowincomplete', False) |
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45 |
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46 def get(self, name, node): |
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47 """Fetches the full text revision contents of the given name+node pair. |
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48 If the full text doesn't exist, throws a KeyError. |
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49 |
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50 Under the hood, this uses getdeltachain() across all the stores to build |
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51 up a full chain to produce the full text. |
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52 """ |
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53 chain = self.getdeltachain(name, node) |
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54 |
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55 if chain[-1][ChainIndicies.BASENODE] != nullid: |
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56 # If we didn't receive a full chain, throw |
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57 raise KeyError((name, hex(node))) |
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58 |
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59 # The last entry in the chain is a full text, so we start our delta |
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60 # applies with that. |
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61 fulltext = chain.pop()[ChainIndicies.DATA] |
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62 |
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63 text = fulltext |
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64 while chain: |
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65 delta = chain.pop()[ChainIndicies.DATA] |
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66 text = mdiff.patches(text, [delta]) |
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67 |
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68 return text |
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69 |
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70 @basestore.baseunionstore.retriable |
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71 def getdelta(self, name, node): |
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72 """Return the single delta entry for the given name/node pair. |
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73 """ |
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74 for store in self.stores: |
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75 try: |
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76 return store.getdelta(name, node) |
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77 except KeyError: |
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78 pass |
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79 |
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80 raise KeyError((name, hex(node))) |
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81 |
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82 def getdeltachain(self, name, node): |
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83 """Returns the deltachain for the given name/node pair. |
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84 |
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85 Returns an ordered list of: |
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86 |
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87 [(name, node, deltabasename, deltabasenode, deltacontent),...] |
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88 |
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89 where the chain is terminated by a full text entry with a nullid |
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90 deltabasenode. |
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91 """ |
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92 chain = self._getpartialchain(name, node) |
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93 while chain[-1][ChainIndicies.BASENODE] != nullid: |
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94 x, x, deltabasename, deltabasenode, x = chain[-1] |
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95 try: |
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96 morechain = self._getpartialchain(deltabasename, deltabasenode) |
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97 chain.extend(morechain) |
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98 except KeyError: |
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99 # If we allow incomplete chains, don't throw. |
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100 if not self.allowincomplete: |
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101 raise |
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102 break |
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103 |
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104 return chain |
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105 |
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106 @basestore.baseunionstore.retriable |
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107 def getmeta(self, name, node): |
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108 """Returns the metadata dict for given node.""" |
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109 for store in self.stores: |
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110 try: |
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111 return store.getmeta(name, node) |
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112 except KeyError: |
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113 pass |
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114 raise KeyError((name, hex(node))) |
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115 |
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116 def getmetrics(self): |
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117 metrics = [s.getmetrics() for s in self.stores] |
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118 return shallowutil.sumdicts(*metrics) |
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119 |
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120 @basestore.baseunionstore.retriable |
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121 def _getpartialchain(self, name, node): |
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122 """Returns a partial delta chain for the given name/node pair. |
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123 |
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124 A partial chain is a chain that may not be terminated in a full-text. |
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125 """ |
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126 for store in self.stores: |
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127 try: |
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128 return store.getdeltachain(name, node) |
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129 except KeyError: |
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130 pass |
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131 |
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132 raise KeyError((name, hex(node))) |
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133 |
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134 def add(self, name, node, data): |
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135 raise RuntimeError("cannot add content only to remotefilelog " |
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136 "contentstore") |
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137 |
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138 def getmissing(self, keys): |
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139 missing = keys |
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140 for store in self.stores: |
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141 if missing: |
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142 missing = store.getmissing(missing) |
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143 return missing |
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144 |
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145 def addremotefilelognode(self, name, node, data): |
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146 if self.writestore: |
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147 self.writestore.addremotefilelognode(name, node, data) |
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148 else: |
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149 raise RuntimeError("no writable store configured") |
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150 |
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151 def markledger(self, ledger, options=None): |
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152 for store in self.stores: |
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153 store.markledger(ledger, options) |
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154 |
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155 class remotefilelogcontentstore(basestore.basestore): |
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156 def __init__(self, *args, **kwargs): |
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157 super(remotefilelogcontentstore, self).__init__(*args, **kwargs) |
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158 self._threaddata = threading.local() |
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159 |
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160 def get(self, name, node): |
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161 # return raw revision text |
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162 data = self._getdata(name, node) |
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163 |
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164 offset, size, flags = shallowutil.parsesizeflags(data) |
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165 content = data[offset:offset + size] |
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166 |
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167 ancestormap = shallowutil.ancestormap(data) |
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168 p1, p2, linknode, copyfrom = ancestormap[node] |
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169 copyrev = None |
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170 if copyfrom: |
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171 copyrev = hex(p1) |
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172 |
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173 self._updatemetacache(node, size, flags) |
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174 |
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175 # lfs tracks renames in its own metadata, remove hg copy metadata, |
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176 # because copy metadata will be re-added by lfs flag processor. |
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177 if flags & revlog.REVIDX_EXTSTORED: |
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178 copyrev = copyfrom = None |
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179 revision = shallowutil.createrevlogtext(content, copyfrom, copyrev) |
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180 return revision |
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181 |
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182 def getdelta(self, name, node): |
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183 # Since remotefilelog content stores only contain full texts, just |
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184 # return that. |
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185 revision = self.get(name, node) |
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186 return revision, name, nullid, self.getmeta(name, node) |
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187 |
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188 def getdeltachain(self, name, node): |
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189 # Since remotefilelog content stores just contain full texts, we return |
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190 # a fake delta chain that just consists of a single full text revision. |
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191 # The nullid in the deltabasenode slot indicates that the revision is a |
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192 # fulltext. |
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193 revision = self.get(name, node) |
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194 return [(name, node, None, nullid, revision)] |
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195 |
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196 def getmeta(self, name, node): |
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197 self._sanitizemetacache() |
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198 if node != self._threaddata.metacache[0]: |
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199 data = self._getdata(name, node) |
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200 offset, size, flags = shallowutil.parsesizeflags(data) |
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201 self._updatemetacache(node, size, flags) |
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202 return self._threaddata.metacache[1] |
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203 |
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204 def add(self, name, node, data): |
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205 raise RuntimeError("cannot add content only to remotefilelog " |
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206 "contentstore") |
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207 |
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208 def _sanitizemetacache(self): |
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209 metacache = getattr(self._threaddata, 'metacache', None) |
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210 if metacache is None: |
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211 self._threaddata.metacache = (None, None) # (node, meta) |
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212 |
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213 def _updatemetacache(self, node, size, flags): |
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214 self._sanitizemetacache() |
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215 if node == self._threaddata.metacache[0]: |
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216 return |
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217 meta = {constants.METAKEYFLAG: flags, |
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218 constants.METAKEYSIZE: size} |
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219 self._threaddata.metacache = (node, meta) |
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220 |
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221 class remotecontentstore(object): |
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222 def __init__(self, ui, fileservice, shared): |
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223 self._fileservice = fileservice |
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224 # type(shared) is usually remotefilelogcontentstore |
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225 self._shared = shared |
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226 |
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227 def get(self, name, node): |
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228 self._fileservice.prefetch([(name, hex(node))], force=True, |
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229 fetchdata=True) |
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230 return self._shared.get(name, node) |
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231 |
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232 def getdelta(self, name, node): |
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233 revision = self.get(name, node) |
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234 return revision, name, nullid, self._shared.getmeta(name, node) |
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235 |
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236 def getdeltachain(self, name, node): |
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237 # Since our remote content stores just contain full texts, we return a |
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238 # fake delta chain that just consists of a single full text revision. |
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239 # The nullid in the deltabasenode slot indicates that the revision is a |
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240 # fulltext. |
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241 revision = self.get(name, node) |
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242 return [(name, node, None, nullid, revision)] |
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243 |
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244 def getmeta(self, name, node): |
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245 self._fileservice.prefetch([(name, hex(node))], force=True, |
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246 fetchdata=True) |
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247 return self._shared.getmeta(name, node) |
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248 |
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249 def add(self, name, node, data): |
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250 raise RuntimeError("cannot add to a remote store") |
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251 |
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252 def getmissing(self, keys): |
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253 return keys |
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254 |
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255 def markledger(self, ledger, options=None): |
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256 pass |
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257 |
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258 class manifestrevlogstore(object): |
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259 def __init__(self, repo): |
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260 self._store = repo.store |
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261 self._svfs = repo.svfs |
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262 self._revlogs = dict() |
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263 self._cl = revlog.revlog(self._svfs, '00changelog.i') |
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264 self._repackstartlinkrev = 0 |
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265 |
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266 def get(self, name, node): |
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267 return self._revlog(name).revision(node, raw=True) |
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268 |
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269 def getdelta(self, name, node): |
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270 revision = self.get(name, node) |
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271 return revision, name, nullid, self.getmeta(name, node) |
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272 |
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273 def getdeltachain(self, name, node): |
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274 revision = self.get(name, node) |
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275 return [(name, node, None, nullid, revision)] |
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276 |
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277 def getmeta(self, name, node): |
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278 rl = self._revlog(name) |
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279 rev = rl.rev(node) |
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280 return {constants.METAKEYFLAG: rl.flags(rev), |
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281 constants.METAKEYSIZE: rl.rawsize(rev)} |
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282 |
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283 def getancestors(self, name, node, known=None): |
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284 if known is None: |
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285 known = set() |
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286 if node in known: |
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287 return [] |
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288 |
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289 rl = self._revlog(name) |
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290 ancestors = {} |
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291 missing = set((node,)) |
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292 for ancrev in rl.ancestors([rl.rev(node)], inclusive=True): |
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293 ancnode = rl.node(ancrev) |
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294 missing.discard(ancnode) |
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295 |
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296 p1, p2 = rl.parents(ancnode) |
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297 if p1 != nullid and p1 not in known: |
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298 missing.add(p1) |
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299 if p2 != nullid and p2 not in known: |
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300 missing.add(p2) |
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301 |
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302 linknode = self._cl.node(rl.linkrev(ancrev)) |
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303 ancestors[rl.node(ancrev)] = (p1, p2, linknode, '') |
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304 if not missing: |
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305 break |
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306 return ancestors |
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307 |
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308 def getnodeinfo(self, name, node): |
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309 cl = self._cl |
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310 rl = self._revlog(name) |
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311 parents = rl.parents(node) |
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312 linkrev = rl.linkrev(rl.rev(node)) |
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313 return (parents[0], parents[1], cl.node(linkrev), None) |
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314 |
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315 def add(self, *args): |
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316 raise RuntimeError("cannot add to a revlog store") |
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317 |
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318 def _revlog(self, name): |
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319 rl = self._revlogs.get(name) |
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320 if rl is None: |
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321 revlogname = '00manifesttree.i' |
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322 if name != '': |
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323 revlogname = 'meta/%s/00manifest.i' % name |
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324 rl = revlog.revlog(self._svfs, revlogname) |
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325 self._revlogs[name] = rl |
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326 return rl |
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327 |
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328 def getmissing(self, keys): |
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329 missing = [] |
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330 for name, node in keys: |
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331 mfrevlog = self._revlog(name) |
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332 if node not in mfrevlog.nodemap: |
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333 missing.append((name, node)) |
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334 |
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335 return missing |
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336 |
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337 def setrepacklinkrevrange(self, startrev, endrev): |
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338 self._repackstartlinkrev = startrev |
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339 self._repackendlinkrev = endrev |
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340 |
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341 def markledger(self, ledger, options=None): |
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342 if options and options.get(constants.OPTION_PACKSONLY): |
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343 return |
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344 treename = '' |
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345 rl = revlog.revlog(self._svfs, '00manifesttree.i') |
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346 startlinkrev = self._repackstartlinkrev |
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347 endlinkrev = self._repackendlinkrev |
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348 for rev in pycompat.xrange(len(rl) - 1, -1, -1): |
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349 linkrev = rl.linkrev(rev) |
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350 if linkrev < startlinkrev: |
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351 break |
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352 if linkrev > endlinkrev: |
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353 continue |
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354 node = rl.node(rev) |
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355 ledger.markdataentry(self, treename, node) |
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356 ledger.markhistoryentry(self, treename, node) |
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357 |
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358 for path, encoded, size in self._store.datafiles(): |
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359 if path[:5] != 'meta/' or path[-2:] != '.i': |
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360 continue |
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361 |
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362 treename = path[5:-len('/00manifest.i')] |
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363 |
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364 rl = revlog.revlog(self._svfs, path) |
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365 for rev in pycompat.xrange(len(rl) - 1, -1, -1): |
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366 linkrev = rl.linkrev(rev) |
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367 if linkrev < startlinkrev: |
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368 break |
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369 if linkrev > endlinkrev: |
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370 continue |
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371 node = rl.node(rev) |
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372 ledger.markdataentry(self, treename, node) |
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373 ledger.markhistoryentry(self, treename, node) |
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374 |
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375 def cleanup(self, ledger): |
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376 pass |