annotate hgext/remotefilelog/shallowrepo.py @ 50851:fa675fd648a3

tag: migrate `opts` to native kwargs
author Matt Harbison <matt_harbison@yahoo.com>
date Sun, 20 Aug 2023 02:13:50 -0400
parents f254fc73d956
children d718eddf01d9
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1 # shallowrepo.py - shallow repository that uses remote filelogs
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2 #
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3 # Copyright 2013 Facebook, Inc.
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2 or any later version.
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7
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8 import os
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9
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10 from mercurial.i18n import _
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11 from mercurial.node import hex, nullrev
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12 from mercurial import (
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13 encoding,
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14 error,
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15 localrepo,
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16 match,
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17 scmutil,
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18 sparse,
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19 util,
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20 )
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21 from mercurial.utils import procutil
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22 from . import (
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23 connectionpool,
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24 constants,
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25 contentstore,
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26 datapack,
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27 fileserverclient,
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28 historypack,
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29 metadatastore,
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30 remotefilectx,
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31 remotefilelog,
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32 shallowutil,
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33 )
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34
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35 # These make*stores functions are global so that other extensions can replace
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36 # them.
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37 def makelocalstores(repo):
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38 """In-repo stores, like .hg/store/data; can not be discarded."""
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39 localpath = os.path.join(repo.svfs.vfs.base, b'data')
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40 if not os.path.exists(localpath):
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41 os.makedirs(localpath)
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42
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43 # Instantiate local data stores
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44 localcontent = contentstore.remotefilelogcontentstore(
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45 repo, localpath, repo.name, shared=False
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46 )
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47 localmetadata = metadatastore.remotefilelogmetadatastore(
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48 repo, localpath, repo.name, shared=False
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49 )
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50 return localcontent, localmetadata
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51
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52
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53 def makecachestores(repo):
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54 """Typically machine-wide, cache of remote data; can be discarded."""
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55 # Instantiate shared cache stores
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56 cachepath = shallowutil.getcachepath(repo.ui)
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57 cachecontent = contentstore.remotefilelogcontentstore(
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58 repo, cachepath, repo.name, shared=True
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59 )
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60 cachemetadata = metadatastore.remotefilelogmetadatastore(
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61 repo, cachepath, repo.name, shared=True
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62 )
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63
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64 repo.sharedstore = cachecontent
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65 repo.shareddatastores.append(cachecontent)
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66 repo.sharedhistorystores.append(cachemetadata)
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67
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68 return cachecontent, cachemetadata
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69
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70
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71 def makeremotestores(repo, cachecontent, cachemetadata):
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72 """These stores fetch data from a remote server."""
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73 # Instantiate remote stores
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74 repo.fileservice = fileserverclient.fileserverclient(repo)
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75 remotecontent = contentstore.remotecontentstore(
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76 repo.ui, repo.fileservice, cachecontent
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77 )
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78 remotemetadata = metadatastore.remotemetadatastore(
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79 repo.ui, repo.fileservice, cachemetadata
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80 )
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81 return remotecontent, remotemetadata
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82
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83
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84 def makepackstores(repo):
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85 """Packs are more efficient (to read from) cache stores."""
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86 # Instantiate pack stores
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87 packpath = shallowutil.getcachepackpath(repo, constants.FILEPACK_CATEGORY)
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88 packcontentstore = datapack.datapackstore(repo.ui, packpath)
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89 packmetadatastore = historypack.historypackstore(repo.ui, packpath)
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90
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91 repo.shareddatastores.append(packcontentstore)
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92 repo.sharedhistorystores.append(packmetadatastore)
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93 shallowutil.reportpackmetrics(
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94 repo.ui, b'filestore', packcontentstore, packmetadatastore
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95 )
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96 return packcontentstore, packmetadatastore
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97
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98
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99 def makeunionstores(repo):
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100 """Union stores iterate the other stores and return the first result."""
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101 repo.shareddatastores = []
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102 repo.sharedhistorystores = []
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103
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104 packcontentstore, packmetadatastore = makepackstores(repo)
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105 cachecontent, cachemetadata = makecachestores(repo)
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106 localcontent, localmetadata = makelocalstores(repo)
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107 remotecontent, remotemetadata = makeremotestores(
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108 repo, cachecontent, cachemetadata
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109 )
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110
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111 # Instantiate union stores
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112 repo.contentstore = contentstore.unioncontentstore(
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113 packcontentstore,
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114 cachecontent,
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115 localcontent,
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116 remotecontent,
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117 writestore=localcontent,
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118 )
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119 repo.metadatastore = metadatastore.unionmetadatastore(
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120 packmetadatastore,
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121 cachemetadata,
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122 localmetadata,
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123 remotemetadata,
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124 writestore=localmetadata,
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125 )
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126
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127 fileservicedatawrite = cachecontent
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128 fileservicehistorywrite = cachemetadata
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129 repo.fileservice.setstore(
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130 repo.contentstore,
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131 repo.metadatastore,
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132 fileservicedatawrite,
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133 fileservicehistorywrite,
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134 )
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135 shallowutil.reportpackmetrics(
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136 repo.ui, b'filestore', packcontentstore, packmetadatastore
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137 )
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138
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139
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140 def wraprepo(repo):
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141 class shallowrepository(repo.__class__):
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142 @util.propertycache
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143 def name(self):
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144 return self.ui.config(b'remotefilelog', b'reponame')
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145
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146 @util.propertycache
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147 def fallbackpath(self):
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148 path = repo.ui.config(
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149 b"remotefilelog",
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150 b"fallbackpath",
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151 repo.ui.config(b'paths', b'default'),
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152 )
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153 if not path:
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154 raise error.Abort(
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155 b"no remotefilelog server "
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156 b"configured - is your .hg/hgrc trusted?"
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157 )
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158
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159 return path
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160
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161 def maybesparsematch(self, *revs, **kwargs):
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162 """
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163 A wrapper that allows the remotefilelog to invoke sparsematch() if
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164 this is a sparse repository, or returns None if this is not a
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165 sparse repository.
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166 """
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167 if revs:
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168 ret = sparse.matcher(repo, revs=revs)
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169 else:
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170 ret = sparse.matcher(repo)
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171
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172 if ret.always():
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173 return None
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174 return ret
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175
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176 def file(self, f):
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177 if f[0] == b'/':
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178 f = f[1:]
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179
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180 if self.shallowmatch(f):
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181 return remotefilelog.remotefilelog(self.svfs, f, self)
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182 else:
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183 return super(shallowrepository, self).file(f)
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184
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185 def filectx(self, path, *args, **kwargs):
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186 if self.shallowmatch(path):
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187 return remotefilectx.remotefilectx(self, path, *args, **kwargs)
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188 else:
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189 return super(shallowrepository, self).filectx(
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190 path, *args, **kwargs
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191 )
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192
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193 @localrepo.unfilteredmethod
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194 def commitctx(self, ctx, error=False, origctx=None):
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195 """Add a new revision to current repository.
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196 Revision information is passed via the context argument.
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197 """
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198
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199 # some contexts already have manifest nodes, they don't need any
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200 # prefetching (for example if we're just editing a commit message
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201 # we can reuse manifest
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202 if not ctx.manifestnode():
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203 # prefetch files that will likely be compared
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204 m1 = ctx.p1().manifest()
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205 files = []
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206 for f in ctx.modified() + ctx.added():
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207 fparent1 = m1.get(f, self.nullid)
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208 if fparent1 != self.nullid:
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209 files.append((f, hex(fparent1)))
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210 self.fileservice.prefetch(files)
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211 return super(shallowrepository, self).commitctx(
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212 ctx, error=error, origctx=origctx
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213 )
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214
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215 def backgroundprefetch(
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216 self, revs, base=None, repack=False, pats=None, opts=None
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217 ):
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218 """Runs prefetch in background with optional repack"""
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219 cmd = [procutil.hgexecutable(), b'-R', repo.origroot, b'prefetch']
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220 if repack:
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221 cmd.append(b'--repack')
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222 if revs:
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223 cmd += [b'-r', revs]
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224 # We know this command will find a binary, so don't block
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225 # on it starting.
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226 kwargs = {}
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227 if repo.ui.configbool(b'devel', b'remotefilelog.bg-wait'):
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228 kwargs['record_wait'] = repo.ui.atexit
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229
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230 procutil.runbgcommand(
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231 cmd, encoding.environ, ensurestart=False, **kwargs
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232 )
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233
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234 def prefetch(self, revs, base=None, pats=None, opts=None):
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235 """Prefetches all the necessary file revisions for the given revs
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236 Optionally runs repack in background
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237 """
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238 with repo._lock(
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239 repo.svfs,
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240 b'prefetchlock',
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241 True,
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242 None,
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243 None,
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244 _(b'prefetching in %s') % repo.origroot,
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245 ):
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246 self._prefetch(revs, base, pats, opts)
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247
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248 def _prefetch(self, revs, base=None, pats=None, opts=None):
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249 fallbackpath = self.fallbackpath
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250 if fallbackpath:
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251 # If we know a rev is on the server, we should fetch the server
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252 # version of those files, since our local file versions might
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253 # become obsolete if the local commits are stripped.
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254 localrevs = repo.revs(b'outgoing(%s)', fallbackpath)
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255 if base is not None and base != nullrev:
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256 serverbase = list(
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257 repo.revs(
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258 b'first(reverse(::%s) - %ld)', base, localrevs
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259 )
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260 )
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261 if serverbase:
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262 base = serverbase[0]
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263 else:
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264 localrevs = repo
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265
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266 mfl = repo.manifestlog
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267 mfrevlog = mfl.getstorage(b'')
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268 if base is not None:
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269 mfdict = mfl[repo[base].manifestnode()].read()
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270 skip = set(mfdict.items())
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271 else:
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272 skip = set()
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273
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274 # Copy the skip set to start large and avoid constant resizing,
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275 # and since it's likely to be very similar to the prefetch set.
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276 files = skip.copy()
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277 serverfiles = skip.copy()
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278 visited = set()
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279 visited.add(nullrev)
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280 revcount = len(revs)
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281 progress = self.ui.makeprogress(_(b'prefetching'), total=revcount)
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282 progress.update(0)
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283 for rev in sorted(revs):
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284 ctx = repo[rev]
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285 if pats:
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286 m = scmutil.match(ctx, pats, opts)
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287 sparsematch = repo.maybesparsematch(rev)
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288
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289 mfnode = ctx.manifestnode()
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290 mfrev = mfrevlog.rev(mfnode)
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291
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292 # Decompressing manifests is expensive.
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293 # When possible, only read the deltas.
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294 p1, p2 = mfrevlog.parentrevs(mfrev)
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295 if p1 in visited and p2 in visited:
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296 mfdict = mfl[mfnode].readfast()
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297 else:
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298 mfdict = mfl[mfnode].read()
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299
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300 diff = mfdict.items()
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301 if pats:
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302 diff = (pf for pf in diff if m(pf[0]))
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303 if sparsematch:
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304 diff = (pf for pf in diff if sparsematch(pf[0]))
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305 if rev not in localrevs:
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306 serverfiles.update(diff)
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307 else:
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308 files.update(diff)
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309
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310 visited.add(mfrev)
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311 progress.increment()
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312
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313 files.difference_update(skip)
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314 serverfiles.difference_update(skip)
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315 progress.complete()
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316
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317 # Fetch files known to be on the server
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318 if serverfiles:
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319 results = [(path, hex(fnode)) for (path, fnode) in serverfiles]
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320 repo.fileservice.prefetch(results, force=True)
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321
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322 # Fetch files that may or may not be on the server
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323 if files:
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324 results = [(path, hex(fnode)) for (path, fnode) in files]
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325 repo.fileservice.prefetch(results)
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326
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327 def close(self):
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328 super(shallowrepository, self).close()
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329 self.connectionpool.close()
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330
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331 repo.__class__ = shallowrepository
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332
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333 repo.shallowmatch = match.always()
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334
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335 makeunionstores(repo)
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336
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337 repo.includepattern = repo.ui.configlist(
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338 b"remotefilelog", b"includepattern", None
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339 )
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340 repo.excludepattern = repo.ui.configlist(
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341 b"remotefilelog", b"excludepattern", None
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342 )
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343 if not util.safehasattr(repo, 'connectionpool'):
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344 repo.connectionpool = connectionpool.connectionpool(repo)
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345
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346 if repo.includepattern or repo.excludepattern:
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347 repo.shallowmatch = match.match(
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348 repo.root, b'', None, repo.includepattern, repo.excludepattern
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349 )