Mercurial > hg
annotate hgext/remotefilelog/contentstore.py @ 43076:2372284d9457
formatting: blacken the codebase
This is using my patch to black
(https://github.com/psf/black/pull/826) so we don't un-wrap collection
literals.
Done with:
hg files 'set:**.py - mercurial/thirdparty/** - "contrib/python-zstandard/**"' | xargs black -S
# skip-blame mass-reformatting only
# no-check-commit reformats foo_bar functions
Differential Revision: https://phab.mercurial-scm.org/D6971
author | Augie Fackler <augie@google.com> |
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date | Sun, 06 Oct 2019 09:45:02 -0400 |
parents | fdeb4c1d23d5 |
children | 687b865b95ad |
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 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 |
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18 class ChainIndicies(object): |
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19 """A static class for easy reference to the delta chain indicies. |
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20 """ |
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21 |
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22 # The filename of this revision delta |
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23 NAME = 0 |
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24 # The mercurial file node for this revision delta |
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25 NODE = 1 |
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26 # The filename of the delta base's revision. This is useful when delta |
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27 # between different files (like in the case of a move or copy, we can delta |
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28 # against the original file content). |
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29 BASENAME = 2 |
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30 # The mercurial file node for the delta base revision. This is the nullid if |
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31 # this delta is a full text. |
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32 BASENODE = 3 |
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33 # The actual delta or full text data. |
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34 DATA = 4 |
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35 |
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36 |
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37 class unioncontentstore(basestore.baseunionstore): |
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38 def __init__(self, *args, **kwargs): |
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39 super(unioncontentstore, self).__init__(*args, **kwargs) |
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40 |
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41 self.stores = args |
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42 self.writestore = kwargs.get(r'writestore') |
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43 |
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44 # If allowincomplete==True then the union store can return partial |
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45 # delta chains, otherwise it will throw a KeyError if a full |
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46 # deltachain can't be found. |
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47 self.allowincomplete = kwargs.get(r'allowincomplete', False) |
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48 |
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49 def get(self, name, node): |
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50 """Fetches the full text revision contents of the given name+node pair. |
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51 If the full text doesn't exist, throws a KeyError. |
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52 |
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53 Under the hood, this uses getdeltachain() across all the stores to build |
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54 up a full chain to produce the full text. |
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55 """ |
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56 chain = self.getdeltachain(name, node) |
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57 |
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58 if chain[-1][ChainIndicies.BASENODE] != nullid: |
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59 # If we didn't receive a full chain, throw |
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60 raise KeyError((name, hex(node))) |
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61 |
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62 # The last entry in the chain is a full text, so we start our delta |
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63 # applies with that. |
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64 fulltext = chain.pop()[ChainIndicies.DATA] |
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65 |
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66 text = fulltext |
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67 while chain: |
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68 delta = chain.pop()[ChainIndicies.DATA] |
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69 text = mdiff.patches(text, [delta]) |
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70 |
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71 return text |
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72 |
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73 @basestore.baseunionstore.retriable |
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74 def getdelta(self, name, node): |
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75 """Return the single delta entry for the given name/node pair. |
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76 """ |
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77 for store in self.stores: |
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78 try: |
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79 return store.getdelta(name, node) |
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80 except KeyError: |
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81 pass |
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82 |
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83 raise KeyError((name, hex(node))) |
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84 |
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85 def getdeltachain(self, name, node): |
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86 """Returns the deltachain for the given name/node pair. |
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87 |
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88 Returns an ordered list of: |
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89 |
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90 [(name, node, deltabasename, deltabasenode, deltacontent),...] |
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91 |
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92 where the chain is terminated by a full text entry with a nullid |
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93 deltabasenode. |
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94 """ |
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95 chain = self._getpartialchain(name, node) |
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96 while chain[-1][ChainIndicies.BASENODE] != nullid: |
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97 x, x, deltabasename, deltabasenode, x = chain[-1] |
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98 try: |
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99 morechain = self._getpartialchain(deltabasename, deltabasenode) |
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100 chain.extend(morechain) |
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101 except KeyError: |
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102 # If we allow incomplete chains, don't throw. |
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103 if not self.allowincomplete: |
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104 raise |
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105 break |
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106 |
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107 return chain |
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108 |
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109 @basestore.baseunionstore.retriable |
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110 def getmeta(self, name, node): |
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111 """Returns the metadata dict for given node.""" |
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112 for store in self.stores: |
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113 try: |
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114 return store.getmeta(name, node) |
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115 except KeyError: |
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116 pass |
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117 raise KeyError((name, hex(node))) |
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118 |
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119 def getmetrics(self): |
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120 metrics = [s.getmetrics() for s in self.stores] |
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121 return shallowutil.sumdicts(*metrics) |
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122 |
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123 @basestore.baseunionstore.retriable |
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124 def _getpartialchain(self, name, node): |
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125 """Returns a partial delta chain for the given name/node pair. |
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126 |
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127 A partial chain is a chain that may not be terminated in a full-text. |
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128 """ |
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129 for store in self.stores: |
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130 try: |
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131 return store.getdeltachain(name, node) |
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132 except KeyError: |
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133 pass |
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134 |
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135 raise KeyError((name, hex(node))) |
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136 |
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137 def add(self, name, node, data): |
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138 raise RuntimeError( |
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139 "cannot add content only to remotefilelog " "contentstore" |
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140 ) |
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141 |
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142 def getmissing(self, keys): |
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143 missing = keys |
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144 for store in self.stores: |
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145 if missing: |
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146 missing = store.getmissing(missing) |
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147 return missing |
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148 |
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149 def addremotefilelognode(self, name, node, data): |
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150 if self.writestore: |
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151 self.writestore.addremotefilelognode(name, node, data) |
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152 else: |
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153 raise RuntimeError("no writable store configured") |
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154 |
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155 def markledger(self, ledger, options=None): |
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156 for store in self.stores: |
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157 store.markledger(ledger, options) |
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158 |
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159 |
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160 class remotefilelogcontentstore(basestore.basestore): |
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161 def __init__(self, *args, **kwargs): |
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162 super(remotefilelogcontentstore, self).__init__(*args, **kwargs) |
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163 self._threaddata = threading.local() |
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164 |
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165 def get(self, name, node): |
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166 # return raw revision text |
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167 data = self._getdata(name, node) |
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168 |
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169 offset, size, flags = shallowutil.parsesizeflags(data) |
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170 content = data[offset : offset + size] |
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171 |
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172 ancestormap = shallowutil.ancestormap(data) |
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173 p1, p2, linknode, copyfrom = ancestormap[node] |
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174 copyrev = None |
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175 if copyfrom: |
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176 copyrev = hex(p1) |
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177 |
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178 self._updatemetacache(node, size, flags) |
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179 |
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180 # lfs tracks renames in its own metadata, remove hg copy metadata, |
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181 # because copy metadata will be re-added by lfs flag processor. |
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182 if flags & revlog.REVIDX_EXTSTORED: |
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183 copyrev = copyfrom = None |
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184 revision = shallowutil.createrevlogtext(content, copyfrom, copyrev) |
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185 return revision |
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186 |
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187 def getdelta(self, name, node): |
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188 # Since remotefilelog content stores only contain full texts, just |
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189 # return that. |
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190 revision = self.get(name, node) |
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191 return revision, name, nullid, self.getmeta(name, node) |
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192 |
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193 def getdeltachain(self, name, node): |
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194 # Since remotefilelog content stores just contain full texts, we return |
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195 # a fake delta chain that just consists of a single full text revision. |
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196 # The nullid in the deltabasenode slot indicates that the revision is a |
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197 # fulltext. |
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198 revision = self.get(name, node) |
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199 return [(name, node, None, nullid, revision)] |
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200 |
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201 def getmeta(self, name, node): |
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202 self._sanitizemetacache() |
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203 if node != self._threaddata.metacache[0]: |
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204 data = self._getdata(name, node) |
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205 offset, size, flags = shallowutil.parsesizeflags(data) |
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206 self._updatemetacache(node, size, flags) |
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207 return self._threaddata.metacache[1] |
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208 |
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209 def add(self, name, node, data): |
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210 raise RuntimeError( |
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211 "cannot add content only to remotefilelog " "contentstore" |
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212 ) |
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213 |
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214 def _sanitizemetacache(self): |
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215 metacache = getattr(self._threaddata, 'metacache', None) |
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216 if metacache is None: |
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217 self._threaddata.metacache = (None, None) # (node, meta) |
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218 |
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219 def _updatemetacache(self, node, size, flags): |
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220 self._sanitizemetacache() |
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221 if node == self._threaddata.metacache[0]: |
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222 return |
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223 meta = {constants.METAKEYFLAG: flags, constants.METAKEYSIZE: size} |
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224 self._threaddata.metacache = (node, meta) |
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225 |
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226 |
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227 class remotecontentstore(object): |
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228 def __init__(self, ui, fileservice, shared): |
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229 self._fileservice = fileservice |
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230 # type(shared) is usually remotefilelogcontentstore |
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231 self._shared = shared |
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232 |
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233 def get(self, name, node): |
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234 self._fileservice.prefetch( |
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235 [(name, hex(node))], force=True, fetchdata=True |
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236 ) |
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237 return self._shared.get(name, node) |
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238 |
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239 def getdelta(self, name, node): |
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240 revision = self.get(name, node) |
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241 return revision, name, nullid, self._shared.getmeta(name, node) |
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242 |
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243 def getdeltachain(self, name, node): |
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244 # Since our remote content stores just contain full texts, we return a |
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245 # fake delta chain that just consists of a single full text revision. |
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246 # The nullid in the deltabasenode slot indicates that the revision is a |
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247 # fulltext. |
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248 revision = self.get(name, node) |
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249 return [(name, node, None, nullid, revision)] |
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250 |
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251 def getmeta(self, name, node): |
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252 self._fileservice.prefetch( |
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253 [(name, hex(node))], force=True, fetchdata=True |
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254 ) |
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255 return self._shared.getmeta(name, node) |
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256 |
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257 def add(self, name, node, data): |
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258 raise RuntimeError("cannot add to a remote store") |
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259 |
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260 def getmissing(self, keys): |
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261 return keys |
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262 |
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263 def markledger(self, ledger, options=None): |
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264 pass |
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265 |
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266 |
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267 class manifestrevlogstore(object): |
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268 def __init__(self, repo): |
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269 self._store = repo.store |
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270 self._svfs = repo.svfs |
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271 self._revlogs = dict() |
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272 self._cl = revlog.revlog(self._svfs, '00changelog.i') |
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273 self._repackstartlinkrev = 0 |
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274 |
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275 def get(self, name, node): |
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276 return self._revlog(name).rawdata(node) |
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277 |
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278 def getdelta(self, name, node): |
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279 revision = self.get(name, node) |
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280 return revision, name, nullid, self.getmeta(name, node) |
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281 |
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282 def getdeltachain(self, name, node): |
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283 revision = self.get(name, node) |
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284 return [(name, node, None, nullid, revision)] |
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285 |
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286 def getmeta(self, name, node): |
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287 rl = self._revlog(name) |
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288 rev = rl.rev(node) |
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289 return { |
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290 constants.METAKEYFLAG: rl.flags(rev), |
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291 constants.METAKEYSIZE: rl.rawsize(rev), |
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292 } |
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293 |
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294 def getancestors(self, name, node, known=None): |
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295 if known is None: |
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296 known = set() |
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297 if node in known: |
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298 return [] |
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299 |
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300 rl = self._revlog(name) |
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301 ancestors = {} |
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302 missing = set((node,)) |
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303 for ancrev in rl.ancestors([rl.rev(node)], inclusive=True): |
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304 ancnode = rl.node(ancrev) |
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305 missing.discard(ancnode) |
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306 |
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307 p1, p2 = rl.parents(ancnode) |
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308 if p1 != nullid and p1 not in known: |
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309 missing.add(p1) |
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310 if p2 != nullid and p2 not in known: |
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311 missing.add(p2) |
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312 |
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313 linknode = self._cl.node(rl.linkrev(ancrev)) |
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314 ancestors[rl.node(ancrev)] = (p1, p2, linknode, '') |
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315 if not missing: |
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316 break |
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317 return ancestors |
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318 |
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319 def getnodeinfo(self, name, node): |
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320 cl = self._cl |
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321 rl = self._revlog(name) |
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322 parents = rl.parents(node) |
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323 linkrev = rl.linkrev(rl.rev(node)) |
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324 return (parents[0], parents[1], cl.node(linkrev), None) |
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325 |
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326 def add(self, *args): |
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327 raise RuntimeError("cannot add to a revlog store") |
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328 |
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329 def _revlog(self, name): |
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330 rl = self._revlogs.get(name) |
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331 if rl is None: |
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332 revlogname = '00manifesttree.i' |
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333 if name != '': |
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334 revlogname = 'meta/%s/00manifest.i' % name |
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335 rl = revlog.revlog(self._svfs, revlogname) |
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336 self._revlogs[name] = rl |
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337 return rl |
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338 |
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339 def getmissing(self, keys): |
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340 missing = [] |
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341 for name, node in keys: |
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342 mfrevlog = self._revlog(name) |
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343 if node not in mfrevlog.nodemap: |
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344 missing.append((name, node)) |
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345 |
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346 return missing |
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347 |
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348 def setrepacklinkrevrange(self, startrev, endrev): |
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349 self._repackstartlinkrev = startrev |
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350 self._repackendlinkrev = endrev |
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351 |
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352 def markledger(self, ledger, options=None): |
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353 if options and options.get(constants.OPTION_PACKSONLY): |
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354 return |
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355 treename = '' |
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356 rl = revlog.revlog(self._svfs, '00manifesttree.i') |
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357 startlinkrev = self._repackstartlinkrev |
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358 endlinkrev = self._repackendlinkrev |
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359 for rev in pycompat.xrange(len(rl) - 1, -1, -1): |
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360 linkrev = rl.linkrev(rev) |
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361 if linkrev < startlinkrev: |
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362 break |
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363 if linkrev > endlinkrev: |
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364 continue |
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365 node = rl.node(rev) |
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366 ledger.markdataentry(self, treename, node) |
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367 ledger.markhistoryentry(self, treename, node) |
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368 |
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369 for path, encoded, size in self._store.datafiles(): |
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370 if path[:5] != 'meta/' or path[-2:] != '.i': |
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371 continue |
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372 |
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373 treename = path[5 : -len('/00manifest.i')] |
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374 |
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375 rl = revlog.revlog(self._svfs, path) |
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376 for rev in pycompat.xrange(len(rl) - 1, -1, -1): |
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377 linkrev = rl.linkrev(rev) |
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378 if linkrev < startlinkrev: |
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379 break |
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380 if linkrev > endlinkrev: |
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381 continue |
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382 node = rl.node(rev) |
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383 ledger.markdataentry(self, treename, node) |
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384 ledger.markhistoryentry(self, treename, node) |
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385 |
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386 def cleanup(self, ledger): |
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387 pass |