Mercurial > hg
annotate hgext/remotefilelog/shallowrepo.py @ 42497:df1419c5756a
remotefilelog: tell runbgcommand to not block on child process startup
These two invocations will always find a binary because they're
re-running hg. As a result, we can skip waiting for the subprocess to
start running and save a little bit of wall-time.
Differential Revision: https://phab.mercurial-scm.org/D6539
author | Augie Fackler <augie@google.com> |
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date | Tue, 18 Jun 2019 09:57:06 -0400 |
parents | 373aeede7352 |
children | d98ec36be808 |
rev | line source |
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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 from __future__ import absolute_import |
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8 |
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9 import os |
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10 |
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11 from mercurial.i18n import _ |
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12 from mercurial.node import hex, nullid, nullrev |
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13 from mercurial import ( |
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14 encoding, |
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15 error, |
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16 localrepo, |
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17 match, |
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18 scmutil, |
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19 sparse, |
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20 util, |
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21 ) |
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22 from mercurial.utils import procutil |
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23 from . import ( |
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24 connectionpool, |
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25 constants, |
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26 contentstore, |
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27 datapack, |
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28 fileserverclient, |
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29 historypack, |
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30 metadatastore, |
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31 remotefilectx, |
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32 remotefilelog, |
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33 shallowutil, |
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34 ) |
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35 |
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36 # These make*stores functions are global so that other extensions can replace |
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37 # them. |
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38 def makelocalstores(repo): |
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39 """In-repo stores, like .hg/store/data; can not be discarded.""" |
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40 localpath = os.path.join(repo.svfs.vfs.base, 'data') |
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41 if not os.path.exists(localpath): |
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42 os.makedirs(localpath) |
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43 |
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44 # Instantiate local data stores |
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45 localcontent = contentstore.remotefilelogcontentstore( |
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46 repo, localpath, repo.name, shared=False) |
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47 localmetadata = metadatastore.remotefilelogmetadatastore( |
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48 repo, localpath, repo.name, shared=False) |
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49 return localcontent, localmetadata |
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50 |
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51 def makecachestores(repo): |
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52 """Typically machine-wide, cache of remote data; can be discarded.""" |
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53 # Instantiate shared cache stores |
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54 cachepath = shallowutil.getcachepath(repo.ui) |
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55 cachecontent = contentstore.remotefilelogcontentstore( |
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56 repo, cachepath, repo.name, shared=True) |
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57 cachemetadata = metadatastore.remotefilelogmetadatastore( |
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58 repo, cachepath, repo.name, shared=True) |
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59 |
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60 repo.sharedstore = cachecontent |
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61 repo.shareddatastores.append(cachecontent) |
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62 repo.sharedhistorystores.append(cachemetadata) |
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63 |
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64 return cachecontent, cachemetadata |
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65 |
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66 def makeremotestores(repo, cachecontent, cachemetadata): |
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67 """These stores fetch data from a remote server.""" |
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68 # Instantiate remote stores |
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69 repo.fileservice = fileserverclient.fileserverclient(repo) |
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70 remotecontent = contentstore.remotecontentstore( |
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71 repo.ui, repo.fileservice, cachecontent) |
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72 remotemetadata = metadatastore.remotemetadatastore( |
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73 repo.ui, repo.fileservice, cachemetadata) |
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74 return remotecontent, remotemetadata |
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75 |
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76 def makepackstores(repo): |
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77 """Packs are more efficient (to read from) cache stores.""" |
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78 # Instantiate pack stores |
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79 packpath = shallowutil.getcachepackpath(repo, |
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80 constants.FILEPACK_CATEGORY) |
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81 packcontentstore = datapack.datapackstore(repo.ui, packpath) |
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82 packmetadatastore = historypack.historypackstore(repo.ui, packpath) |
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83 |
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84 repo.shareddatastores.append(packcontentstore) |
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85 repo.sharedhistorystores.append(packmetadatastore) |
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86 shallowutil.reportpackmetrics(repo.ui, 'filestore', packcontentstore, |
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87 packmetadatastore) |
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88 return packcontentstore, packmetadatastore |
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89 |
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90 def makeunionstores(repo): |
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91 """Union stores iterate the other stores and return the first result.""" |
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92 repo.shareddatastores = [] |
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93 repo.sharedhistorystores = [] |
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94 |
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95 packcontentstore, packmetadatastore = makepackstores(repo) |
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96 cachecontent, cachemetadata = makecachestores(repo) |
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97 localcontent, localmetadata = makelocalstores(repo) |
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98 remotecontent, remotemetadata = makeremotestores(repo, cachecontent, |
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99 cachemetadata) |
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100 |
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101 # Instantiate union stores |
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102 repo.contentstore = contentstore.unioncontentstore( |
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103 packcontentstore, cachecontent, |
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104 localcontent, remotecontent, writestore=localcontent) |
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105 repo.metadatastore = metadatastore.unionmetadatastore( |
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106 packmetadatastore, cachemetadata, localmetadata, remotemetadata, |
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107 writestore=localmetadata) |
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108 |
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109 fileservicedatawrite = cachecontent |
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110 fileservicehistorywrite = cachemetadata |
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111 repo.fileservice.setstore(repo.contentstore, repo.metadatastore, |
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112 fileservicedatawrite, fileservicehistorywrite) |
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113 shallowutil.reportpackmetrics(repo.ui, 'filestore', |
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114 packcontentstore, packmetadatastore) |
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115 |
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116 def wraprepo(repo): |
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117 class shallowrepository(repo.__class__): |
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118 @util.propertycache |
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119 def name(self): |
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120 return self.ui.config('remotefilelog', 'reponame') |
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121 |
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122 @util.propertycache |
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123 def fallbackpath(self): |
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124 path = repo.ui.config("remotefilelog", "fallbackpath", |
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125 repo.ui.config('paths', 'default')) |
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126 if not path: |
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127 raise error.Abort("no remotefilelog server " |
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128 "configured - is your .hg/hgrc trusted?") |
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129 |
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130 return path |
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131 |
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132 def maybesparsematch(self, *revs, **kwargs): |
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133 ''' |
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134 A wrapper that allows the remotefilelog to invoke sparsematch() if |
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135 this is a sparse repository, or returns None if this is not a |
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136 sparse repository. |
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137 ''' |
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138 if revs: |
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139 ret = sparse.matcher(repo, revs=revs) |
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140 else: |
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141 ret = sparse.matcher(repo) |
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142 |
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143 if ret.always(): |
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144 return None |
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145 return ret |
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146 |
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147 def file(self, f): |
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148 if f[0] == '/': |
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149 f = f[1:] |
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150 |
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151 if self.shallowmatch(f): |
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152 return remotefilelog.remotefilelog(self.svfs, f, self) |
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153 else: |
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154 return super(shallowrepository, self).file(f) |
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155 |
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156 def filectx(self, path, *args, **kwargs): |
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157 if self.shallowmatch(path): |
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158 return remotefilectx.remotefilectx(self, path, *args, **kwargs) |
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159 else: |
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160 return super(shallowrepository, self).filectx(path, *args, |
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161 **kwargs) |
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162 |
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163 @localrepo.unfilteredmethod |
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164 def commitctx(self, ctx, error=False): |
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165 """Add a new revision to current repository. |
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166 Revision information is passed via the context argument. |
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167 """ |
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168 |
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169 # some contexts already have manifest nodes, they don't need any |
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170 # prefetching (for example if we're just editing a commit message |
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171 # we can reuse manifest |
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172 if not ctx.manifestnode(): |
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173 # prefetch files that will likely be compared |
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174 m1 = ctx.p1().manifest() |
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175 files = [] |
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176 for f in ctx.modified() + ctx.added(): |
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177 fparent1 = m1.get(f, nullid) |
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178 if fparent1 != nullid: |
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179 files.append((f, hex(fparent1))) |
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180 self.fileservice.prefetch(files) |
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181 return super(shallowrepository, self).commitctx(ctx, |
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182 error=error) |
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183 |
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184 def backgroundprefetch(self, revs, base=None, repack=False, pats=None, |
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185 opts=None): |
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186 """Runs prefetch in background with optional repack |
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187 """ |
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188 cmd = [procutil.hgexecutable(), '-R', repo.origroot, 'prefetch'] |
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189 if repack: |
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190 cmd.append('--repack') |
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191 if revs: |
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192 cmd += ['-r', revs] |
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193 # We know this command will find a binary, so don't block |
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194 # on it starting. |
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195 procutil.runbgcommand(cmd, encoding.environ, ensurestart=False) |
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196 |
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197 def prefetch(self, revs, base=None, pats=None, opts=None): |
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198 """Prefetches all the necessary file revisions for the given revs |
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199 Optionally runs repack in background |
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200 """ |
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201 with repo._lock(repo.svfs, 'prefetchlock', True, None, None, |
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202 _('prefetching in %s') % repo.origroot): |
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203 self._prefetch(revs, base, pats, opts) |
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204 |
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205 def _prefetch(self, revs, base=None, pats=None, opts=None): |
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206 fallbackpath = self.fallbackpath |
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207 if fallbackpath: |
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208 # If we know a rev is on the server, we should fetch the server |
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209 # version of those files, since our local file versions might |
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210 # become obsolete if the local commits are stripped. |
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211 localrevs = repo.revs('outgoing(%s)', fallbackpath) |
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212 if base is not None and base != nullrev: |
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213 serverbase = list(repo.revs('first(reverse(::%s) - %ld)', |
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214 base, localrevs)) |
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215 if serverbase: |
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216 base = serverbase[0] |
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217 else: |
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218 localrevs = repo |
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219 |
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220 mfl = repo.manifestlog |
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221 mfrevlog = mfl.getstorage('') |
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222 if base is not None: |
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223 mfdict = mfl[repo[base].manifestnode()].read() |
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224 skip = set(mfdict.iteritems()) |
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225 else: |
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226 skip = set() |
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227 |
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228 # Copy the skip set to start large and avoid constant resizing, |
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229 # and since it's likely to be very similar to the prefetch set. |
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230 files = skip.copy() |
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231 serverfiles = skip.copy() |
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232 visited = set() |
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233 visited.add(nullrev) |
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234 revcount = len(revs) |
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235 progress = self.ui.makeprogress(_('prefetching'), total=revcount) |
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236 progress.update(0) |
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237 for rev in sorted(revs): |
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238 ctx = repo[rev] |
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239 if pats: |
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240 m = scmutil.match(ctx, pats, opts) |
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241 sparsematch = repo.maybesparsematch(rev) |
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242 |
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243 mfnode = ctx.manifestnode() |
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244 mfrev = mfrevlog.rev(mfnode) |
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245 |
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246 # Decompressing manifests is expensive. |
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247 # When possible, only read the deltas. |
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248 p1, p2 = mfrevlog.parentrevs(mfrev) |
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249 if p1 in visited and p2 in visited: |
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250 mfdict = mfl[mfnode].readfast() |
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251 else: |
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252 mfdict = mfl[mfnode].read() |
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253 |
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254 diff = mfdict.iteritems() |
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255 if pats: |
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256 diff = (pf for pf in diff if m(pf[0])) |
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257 if sparsematch: |
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258 diff = (pf for pf in diff if sparsematch(pf[0])) |
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259 if rev not in localrevs: |
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260 serverfiles.update(diff) |
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261 else: |
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262 files.update(diff) |
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263 |
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264 visited.add(mfrev) |
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265 progress.increment() |
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266 |
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267 files.difference_update(skip) |
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268 serverfiles.difference_update(skip) |
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269 progress.complete() |
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270 |
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271 # Fetch files known to be on the server |
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272 if serverfiles: |
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273 results = [(path, hex(fnode)) for (path, fnode) in serverfiles] |
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274 repo.fileservice.prefetch(results, force=True) |
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275 |
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276 # Fetch files that may or may not be on the server |
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277 if files: |
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278 results = [(path, hex(fnode)) for (path, fnode) in files] |
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279 repo.fileservice.prefetch(results) |
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280 |
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281 def close(self): |
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282 super(shallowrepository, self).close() |
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283 self.connectionpool.close() |
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284 |
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285 repo.__class__ = shallowrepository |
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286 |
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287 repo.shallowmatch = match.always() |
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288 |
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289 makeunionstores(repo) |
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290 |
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291 repo.includepattern = repo.ui.configlist("remotefilelog", "includepattern", |
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292 None) |
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293 repo.excludepattern = repo.ui.configlist("remotefilelog", "excludepattern", |
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294 None) |
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295 if not util.safehasattr(repo, 'connectionpool'): |
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296 repo.connectionpool = connectionpool.connectionpool(repo) |
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297 |
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298 if repo.includepattern or repo.excludepattern: |
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299 repo.shallowmatch = match.match(repo.root, '', None, |
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300 repo.includepattern, repo.excludepattern) |