annotate tests/wireprotosimplecache.py @ 46378:8b02f132adf6

test: unquiet few tests to demonstrate changes in upcoming patches Upcoming patches will skip revlog cloning for share-safe upgrades. Differential Revision: https://phab.mercurial-scm.org/D9773
author Pulkit Goyal <7895pulkit@gmail.com>
date Thu, 14 Jan 2021 17:27:54 +0530
parents 9d2b2df2c2ba
children
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1 # wireprotosimplecache.py - Extension providing in-memory wire protocol cache
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2 #
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3 # Copyright 2018 Gregory Szorc <gregory.szorc@gmail.com>
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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 from __future__ import absolute_import
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9
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10 from mercurial import (
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11 extensions,
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12 registrar,
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13 util,
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14 wireprotoserver,
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15 wireprototypes,
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16 wireprotov2server,
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17 )
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18 from mercurial.interfaces import (
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19 repository,
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20 util as interfaceutil,
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21 )
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22 from mercurial.utils import stringutil
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23
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24 CACHE = None
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25
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26 configtable = {}
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27 configitem = registrar.configitem(configtable)
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28
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29 configitem(b'simplecache', b'cacheapi', default=False)
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30 configitem(b'simplecache', b'cacheobjects', default=False)
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31 configitem(b'simplecache', b'redirectsfile', default=None)
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32
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33 # API handler that makes cached keys available.
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34 def handlecacherequest(rctx, req, res, checkperm, urlparts):
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35 if rctx.repo.ui.configbool(b'simplecache', b'cacheobjects'):
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36 res.status = b'500 Internal Server Error'
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37 res.setbodybytes(b'cacheobjects not supported for api server')
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38 return
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39
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40 if not urlparts:
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41 res.status = b'200 OK'
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42 res.headers[b'Content-Type'] = b'text/plain'
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43 res.setbodybytes(b'simple cache server')
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44 return
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45
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46 key = b'/'.join(urlparts)
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47
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48 if key not in CACHE:
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49 res.status = b'404 Not Found'
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50 res.headers[b'Content-Type'] = b'text/plain'
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51 res.setbodybytes(b'key not found in cache')
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52 return
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53
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54 res.status = b'200 OK'
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55 res.headers[b'Content-Type'] = b'application/mercurial-cbor'
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56 res.setbodybytes(CACHE[key])
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57
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58
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59 def cachedescriptor(req, repo):
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60 return {}
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61
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62
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63 wireprotoserver.API_HANDLERS[b'simplecache'] = {
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64 b'config': (b'simplecache', b'cacheapi'),
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65 b'handler': handlecacherequest,
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66 b'apidescriptor': cachedescriptor,
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67 }
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68
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69
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70 @interfaceutil.implementer(repository.iwireprotocolcommandcacher)
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71 class memorycacher(object):
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72 def __init__(
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73 self, ui, command, encodefn, redirecttargets, redirecthashes, req
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74 ):
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75 self.ui = ui
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76 self.encodefn = encodefn
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77 self.redirecttargets = redirecttargets
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78 self.redirecthashes = redirecthashes
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79 self.req = req
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80 self.key = None
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81 self.cacheobjects = ui.configbool(b'simplecache', b'cacheobjects')
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82 self.cacheapi = ui.configbool(b'simplecache', b'cacheapi')
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83 self.buffered = []
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84
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85 ui.log(b'simplecache', b'cacher constructed for %s\n', command)
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86
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87 def __enter__(self):
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88 return self
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89
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90 def __exit__(self, exctype, excvalue, exctb):
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91 if exctype:
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92 self.ui.log(b'simplecache', b'cacher exiting due to error\n')
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93
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94 def adjustcachekeystate(self, state):
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95 # Needed in order to make tests deterministic. Don't copy this
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96 # pattern for production caches!
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97 del state[b'repo']
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98
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99 def setcachekey(self, key):
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100 self.key = key
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101 return True
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102
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103 def lookup(self):
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104 if self.key not in CACHE:
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105 self.ui.log(b'simplecache', b'cache miss for %s\n', self.key)
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106 return None
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107
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108 entry = CACHE[self.key]
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109 self.ui.log(b'simplecache', b'cache hit for %s\n', self.key)
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110
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111 redirectable = True
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112
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113 if not self.cacheapi:
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114 redirectable = False
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115 elif not self.redirecttargets:
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116 redirectable = False
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117 else:
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118 clienttargets = set(self.redirecttargets)
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119 ourtargets = {t[b'name'] for t in loadredirecttargets(self.ui)}
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120
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121 # We only ever redirect to a single target (for now). So we don't
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122 # need to store which target matched.
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123 if not clienttargets & ourtargets:
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124 redirectable = False
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125
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126 if redirectable:
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127 paths = self.req.dispatchparts[:-3]
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128 paths.append(b'simplecache')
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129 paths.append(self.key)
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130
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131 url = b'%s/%s' % (self.req.baseurl, b'/'.join(paths))
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132
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133 # url = b'http://example.com/%s' % self.key
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134 self.ui.log(
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135 b'simplecache',
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136 b'sending content redirect for %s to ' b'%s\n',
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137 self.key,
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138 url,
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139 )
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140 response = wireprototypes.alternatelocationresponse(
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141 url=url, mediatype=b'application/mercurial-cbor'
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142 )
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143
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144 return {b'objs': [response]}
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145
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146 if self.cacheobjects:
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147 return {
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148 b'objs': entry,
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149 }
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150 else:
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151 return {
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152 b'objs': [wireprototypes.encodedresponse(entry)],
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153 }
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154
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155 def onobject(self, obj):
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156 if self.cacheobjects:
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157 self.buffered.append(obj)
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158 else:
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159 self.buffered.extend(self.encodefn(obj))
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160
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161 yield obj
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162
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163 def onfinished(self):
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164 self.ui.log(b'simplecache', b'storing cache entry for %s\n', self.key)
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165 if self.cacheobjects:
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166 CACHE[self.key] = self.buffered
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167 else:
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168 CACHE[self.key] = b''.join(self.buffered)
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169
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170 return []
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171
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172
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173 def makeresponsecacher(
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174 orig,
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175 repo,
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176 proto,
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177 command,
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178 args,
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179 objencoderfn,
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180 redirecttargets,
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181 redirecthashes,
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182 ):
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183 return memorycacher(
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184 repo.ui,
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185 command,
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186 objencoderfn,
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187 redirecttargets,
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188 redirecthashes,
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189 proto._req,
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190 )
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191
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192
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193 def loadredirecttargets(ui):
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194 path = ui.config(b'simplecache', b'redirectsfile')
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195 if not path:
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196 return []
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197
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198 with open(path, 'rb') as fh:
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199 s = fh.read()
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200
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201 return stringutil.evalpythonliteral(s)
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202
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203
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204 def getadvertisedredirecttargets(orig, repo, proto):
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205 return loadredirecttargets(repo.ui)
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206
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207
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208 def extsetup(ui):
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209 global CACHE
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210
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211 CACHE = util.lrucachedict(10000)
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212
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213 extensions.wrapfunction(
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214 wireprotov2server, b'makeresponsecacher', makeresponsecacher
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215 )
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216 extensions.wrapfunction(
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217 wireprotov2server,
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218 b'getadvertisedredirecttargets',
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219 getadvertisedredirecttargets,
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220 )