Mercurial > hg
annotate hgext/remotefilelog/contentstore.py @ 43117:8ff1ecfadcd1
cleanup: join string literals that are already on one line
Thanks to Kyle for noticing this and for providing the regular
expression to run on the codebase.
This patch has been reviewed by the test suite and they approved of
it.
# skip-blame: fallout from mass reformatting
Differential Revision: https://phab.mercurial-scm.org/D7028
author | Martin von Zweigbergk <martinvonz@google.com> |
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date | Tue, 08 Oct 2019 15:06:18 -0700 |
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children | 9f70512ae2cf |
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.pycompat import getattr |
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7 from mercurial import ( |
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8 mdiff, |
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9 pycompat, |
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10 revlog, |
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11 ) |
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12 from . import ( |
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13 basestore, |
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14 constants, |
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15 shallowutil, |
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16 ) |
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17 |
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18 |
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19 class ChainIndicies(object): |
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20 """A static class for easy reference to the delta chain indicies. |
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21 """ |
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22 |
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23 # The filename of this revision delta |
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24 NAME = 0 |
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25 # The mercurial file node for this revision delta |
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26 NODE = 1 |
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27 # The filename of the delta base's revision. This is useful when delta |
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28 # between different files (like in the case of a move or copy, we can delta |
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29 # against the original file content). |
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30 BASENAME = 2 |
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31 # The mercurial file node for the delta base revision. This is the nullid if |
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32 # this delta is a full text. |
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33 BASENODE = 3 |
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34 # The actual delta or full text data. |
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35 DATA = 4 |
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36 |
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37 |
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38 class unioncontentstore(basestore.baseunionstore): |
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39 def __init__(self, *args, **kwargs): |
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40 super(unioncontentstore, self).__init__(*args, **kwargs) |
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41 |
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42 self.stores = args |
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43 self.writestore = kwargs.get(r'writestore') |
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44 |
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45 # If allowincomplete==True then the union store can return partial |
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46 # delta chains, otherwise it will throw a KeyError if a full |
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47 # deltachain can't be found. |
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48 self.allowincomplete = kwargs.get(r'allowincomplete', False) |
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49 |
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50 def get(self, name, node): |
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51 """Fetches the full text revision contents of the given name+node pair. |
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52 If the full text doesn't exist, throws a KeyError. |
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53 |
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54 Under the hood, this uses getdeltachain() across all the stores to build |
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55 up a full chain to produce the full text. |
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56 """ |
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57 chain = self.getdeltachain(name, node) |
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58 |
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59 if chain[-1][ChainIndicies.BASENODE] != nullid: |
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60 # If we didn't receive a full chain, throw |
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61 raise KeyError((name, hex(node))) |
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62 |
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63 # The last entry in the chain is a full text, so we start our delta |
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64 # applies with that. |
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65 fulltext = chain.pop()[ChainIndicies.DATA] |
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66 |
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67 text = fulltext |
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68 while chain: |
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69 delta = chain.pop()[ChainIndicies.DATA] |
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70 text = mdiff.patches(text, [delta]) |
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71 |
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72 return text |
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73 |
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74 @basestore.baseunionstore.retriable |
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75 def getdelta(self, name, node): |
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76 """Return the single delta entry for the given name/node pair. |
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77 """ |
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78 for store in self.stores: |
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79 try: |
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80 return store.getdelta(name, node) |
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81 except KeyError: |
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82 pass |
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83 |
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84 raise KeyError((name, hex(node))) |
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85 |
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86 def getdeltachain(self, name, node): |
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87 """Returns the deltachain for the given name/node pair. |
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88 |
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89 Returns an ordered list of: |
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90 |
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91 [(name, node, deltabasename, deltabasenode, deltacontent),...] |
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92 |
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93 where the chain is terminated by a full text entry with a nullid |
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94 deltabasenode. |
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95 """ |
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96 chain = self._getpartialchain(name, node) |
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97 while chain[-1][ChainIndicies.BASENODE] != nullid: |
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98 x, x, deltabasename, deltabasenode, x = chain[-1] |
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99 try: |
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100 morechain = self._getpartialchain(deltabasename, deltabasenode) |
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101 chain.extend(morechain) |
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102 except KeyError: |
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103 # If we allow incomplete chains, don't throw. |
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104 if not self.allowincomplete: |
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105 raise |
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106 break |
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107 |
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108 return chain |
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109 |
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110 @basestore.baseunionstore.retriable |
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111 def getmeta(self, name, node): |
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112 """Returns the metadata dict for given node.""" |
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113 for store in self.stores: |
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114 try: |
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115 return store.getmeta(name, node) |
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116 except KeyError: |
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117 pass |
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118 raise KeyError((name, hex(node))) |
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119 |
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120 def getmetrics(self): |
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121 metrics = [s.getmetrics() for s in self.stores] |
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122 return shallowutil.sumdicts(*metrics) |
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123 |
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124 @basestore.baseunionstore.retriable |
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125 def _getpartialchain(self, name, node): |
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126 """Returns a partial delta chain for the given name/node pair. |
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127 |
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128 A partial chain is a chain that may not be terminated in a full-text. |
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129 """ |
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130 for store in self.stores: |
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131 try: |
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132 return store.getdeltachain(name, node) |
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133 except KeyError: |
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134 pass |
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135 |
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136 raise KeyError((name, hex(node))) |
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137 |
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138 def add(self, name, node, data): |
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139 raise RuntimeError( |
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140 b"cannot add content only to remotefilelog contentstore" |
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141 ) |
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142 |
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143 def getmissing(self, keys): |
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144 missing = keys |
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145 for store in self.stores: |
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146 if missing: |
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147 missing = store.getmissing(missing) |
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148 return missing |
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149 |
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150 def addremotefilelognode(self, name, node, data): |
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151 if self.writestore: |
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152 self.writestore.addremotefilelognode(name, node, data) |
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153 else: |
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154 raise RuntimeError(b"no writable store configured") |
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155 |
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156 def markledger(self, ledger, options=None): |
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157 for store in self.stores: |
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158 store.markledger(ledger, options) |
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159 |
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160 |
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161 class remotefilelogcontentstore(basestore.basestore): |
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162 def __init__(self, *args, **kwargs): |
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163 super(remotefilelogcontentstore, self).__init__(*args, **kwargs) |
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164 self._threaddata = threading.local() |
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165 |
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166 def get(self, name, node): |
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167 # return raw revision text |
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168 data = self._getdata(name, node) |
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169 |
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170 offset, size, flags = shallowutil.parsesizeflags(data) |
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171 content = data[offset : offset + size] |
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172 |
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173 ancestormap = shallowutil.ancestormap(data) |
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174 p1, p2, linknode, copyfrom = ancestormap[node] |
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175 copyrev = None |
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176 if copyfrom: |
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177 copyrev = hex(p1) |
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178 |
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179 self._updatemetacache(node, size, flags) |
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180 |
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181 # lfs tracks renames in its own metadata, remove hg copy metadata, |
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182 # because copy metadata will be re-added by lfs flag processor. |
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183 if flags & revlog.REVIDX_EXTSTORED: |
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184 copyrev = copyfrom = None |
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185 revision = shallowutil.createrevlogtext(content, copyfrom, copyrev) |
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186 return revision |
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187 |
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188 def getdelta(self, name, node): |
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189 # Since remotefilelog content stores only contain full texts, just |
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190 # return that. |
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191 revision = self.get(name, node) |
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192 return revision, name, nullid, self.getmeta(name, node) |
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193 |
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194 def getdeltachain(self, name, node): |
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195 # Since remotefilelog content stores just contain full texts, we return |
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196 # a fake delta chain that just consists of a single full text revision. |
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197 # The nullid in the deltabasenode slot indicates that the revision is a |
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198 # fulltext. |
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199 revision = self.get(name, node) |
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200 return [(name, node, None, nullid, revision)] |
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201 |
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202 def getmeta(self, name, node): |
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203 self._sanitizemetacache() |
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204 if node != self._threaddata.metacache[0]: |
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205 data = self._getdata(name, node) |
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206 offset, size, flags = shallowutil.parsesizeflags(data) |
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207 self._updatemetacache(node, size, flags) |
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208 return self._threaddata.metacache[1] |
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209 |
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210 def add(self, name, node, data): |
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211 raise RuntimeError( |
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212 b"cannot add content only to remotefilelog contentstore" |
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213 ) |
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214 |
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215 def _sanitizemetacache(self): |
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216 metacache = getattr(self._threaddata, 'metacache', None) |
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217 if metacache is None: |
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218 self._threaddata.metacache = (None, None) # (node, meta) |
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219 |
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220 def _updatemetacache(self, node, size, flags): |
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221 self._sanitizemetacache() |
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222 if node == self._threaddata.metacache[0]: |
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223 return |
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224 meta = {constants.METAKEYFLAG: flags, constants.METAKEYSIZE: size} |
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225 self._threaddata.metacache = (node, meta) |
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226 |
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227 |
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228 class remotecontentstore(object): |
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229 def __init__(self, ui, fileservice, shared): |
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230 self._fileservice = fileservice |
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231 # type(shared) is usually remotefilelogcontentstore |
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232 self._shared = shared |
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233 |
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234 def get(self, name, node): |
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235 self._fileservice.prefetch( |
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236 [(name, hex(node))], force=True, fetchdata=True |
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237 ) |
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238 return self._shared.get(name, node) |
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239 |
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240 def getdelta(self, name, node): |
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241 revision = self.get(name, node) |
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242 return revision, name, nullid, self._shared.getmeta(name, node) |
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243 |
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244 def getdeltachain(self, name, node): |
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245 # Since our remote content stores just contain full texts, we return a |
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246 # fake delta chain that just consists of a single full text revision. |
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247 # The nullid in the deltabasenode slot indicates that the revision is a |
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248 # fulltext. |
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249 revision = self.get(name, node) |
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250 return [(name, node, None, nullid, revision)] |
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251 |
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252 def getmeta(self, name, node): |
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253 self._fileservice.prefetch( |
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254 [(name, hex(node))], force=True, fetchdata=True |
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255 ) |
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256 return self._shared.getmeta(name, node) |
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257 |
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258 def add(self, name, node, data): |
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259 raise RuntimeError(b"cannot add to a remote store") |
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260 |
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261 def getmissing(self, keys): |
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262 return keys |
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263 |
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264 def markledger(self, ledger, options=None): |
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265 pass |
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266 |
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267 |
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268 class manifestrevlogstore(object): |
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269 def __init__(self, repo): |
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270 self._store = repo.store |
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271 self._svfs = repo.svfs |
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272 self._revlogs = dict() |
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273 self._cl = revlog.revlog(self._svfs, b'00changelog.i') |
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274 self._repackstartlinkrev = 0 |
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275 |
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276 def get(self, name, node): |
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277 return self._revlog(name).rawdata(node) |
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278 |
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279 def getdelta(self, name, node): |
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280 revision = self.get(name, node) |
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281 return revision, name, nullid, self.getmeta(name, node) |
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282 |
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283 def getdeltachain(self, name, node): |
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284 revision = self.get(name, node) |
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285 return [(name, node, None, nullid, revision)] |
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286 |
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287 def getmeta(self, name, node): |
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288 rl = self._revlog(name) |
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289 rev = rl.rev(node) |
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290 return { |
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291 constants.METAKEYFLAG: rl.flags(rev), |
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292 constants.METAKEYSIZE: rl.rawsize(rev), |
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293 } |
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294 |
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295 def getancestors(self, name, node, known=None): |
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296 if known is None: |
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297 known = set() |
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298 if node in known: |
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299 return [] |
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300 |
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301 rl = self._revlog(name) |
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302 ancestors = {} |
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303 missing = set((node,)) |
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304 for ancrev in rl.ancestors([rl.rev(node)], inclusive=True): |
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305 ancnode = rl.node(ancrev) |
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306 missing.discard(ancnode) |
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307 |
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308 p1, p2 = rl.parents(ancnode) |
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309 if p1 != nullid and p1 not in known: |
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310 missing.add(p1) |
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311 if p2 != nullid and p2 not in known: |
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312 missing.add(p2) |
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313 |
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314 linknode = self._cl.node(rl.linkrev(ancrev)) |
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315 ancestors[rl.node(ancrev)] = (p1, p2, linknode, b'') |
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316 if not missing: |
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317 break |
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318 return ancestors |
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319 |
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320 def getnodeinfo(self, name, node): |
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321 cl = self._cl |
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322 rl = self._revlog(name) |
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323 parents = rl.parents(node) |
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324 linkrev = rl.linkrev(rl.rev(node)) |
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325 return (parents[0], parents[1], cl.node(linkrev), None) |
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326 |
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327 def add(self, *args): |
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328 raise RuntimeError(b"cannot add to a revlog store") |
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329 |
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330 def _revlog(self, name): |
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331 rl = self._revlogs.get(name) |
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332 if rl is None: |
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333 revlogname = b'00manifesttree.i' |
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334 if name != b'': |
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335 revlogname = b'meta/%s/00manifest.i' % name |
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336 rl = revlog.revlog(self._svfs, revlogname) |
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337 self._revlogs[name] = rl |
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338 return rl |
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339 |
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340 def getmissing(self, keys): |
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341 missing = [] |
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342 for name, node in keys: |
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343 mfrevlog = self._revlog(name) |
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344 if node not in mfrevlog.nodemap: |
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345 missing.append((name, node)) |
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346 |
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347 return missing |
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348 |
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349 def setrepacklinkrevrange(self, startrev, endrev): |
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350 self._repackstartlinkrev = startrev |
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351 self._repackendlinkrev = endrev |
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352 |
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353 def markledger(self, ledger, options=None): |
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354 if options and options.get(constants.OPTION_PACKSONLY): |
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355 return |
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356 treename = b'' |
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357 rl = revlog.revlog(self._svfs, b'00manifesttree.i') |
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358 startlinkrev = self._repackstartlinkrev |
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359 endlinkrev = self._repackendlinkrev |
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360 for rev in pycompat.xrange(len(rl) - 1, -1, -1): |
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361 linkrev = rl.linkrev(rev) |
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362 if linkrev < startlinkrev: |
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363 break |
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364 if linkrev > endlinkrev: |
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365 continue |
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366 node = rl.node(rev) |
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367 ledger.markdataentry(self, treename, node) |
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368 ledger.markhistoryentry(self, treename, node) |
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369 |
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370 for path, encoded, size in self._store.datafiles(): |
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371 if path[:5] != b'meta/' or path[-2:] != b'.i': |
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372 continue |
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373 |
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374 treename = path[5 : -len(b'/00manifest.i')] |
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375 |
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376 rl = revlog.revlog(self._svfs, path) |
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377 for rev in pycompat.xrange(len(rl) - 1, -1, -1): |
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378 linkrev = rl.linkrev(rev) |
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379 if linkrev < startlinkrev: |
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380 break |
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381 if linkrev > endlinkrev: |
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382 continue |
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383 node = rl.node(rev) |
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384 ledger.markdataentry(self, treename, node) |
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385 ledger.markhistoryentry(self, treename, node) |
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386 |
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387 def cleanup(self, ledger): |
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388 pass |