Mercurial > hg
annotate mercurial/sshpeer.py @ 28238:b57d45ec33b2
test: update test-bundle2-format.t comment
Now that bundle2 is used by default for all exchanges, this comment is obviously
out of date. Having deep testing of the API and expected behavior of the format
and its processing is still valuable, so the comment is updated.
author | Pierre-Yves David <pierre-yves.david@fb.com> |
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date | Thu, 25 Feb 2016 10:34:31 +0100 |
parents | 8953e963ce8c |
children | 48fd02dac1d4 |
rev | line source |
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1 # sshpeer.py - ssh repository proxy class for mercurial |
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2 # |
2859 | 3 # Copyright 2005, 2006 Matt Mackall <mpm@selenic.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 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 import re |
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11 |
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12 from .i18n import _ |
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13 from . import ( |
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14 error, |
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15 util, |
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16 wireproto, |
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17 ) |
60 | 18 |
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19 class remotelock(object): |
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20 def __init__(self, repo): |
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21 self.repo = repo |
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22 def release(self): |
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23 self.repo.unlock() |
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24 self.repo = None |
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25 def __enter__(self): |
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26 return self |
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27 def __exit__(self, exc_type, exc_val, exc_tb): |
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28 if self.repo: |
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29 self.release() |
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30 def __del__(self): |
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31 if self.repo: |
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32 self.release() |
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33 |
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34 def _serverquote(s): |
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35 if not s: |
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36 return s |
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37 '''quote a string for the remote shell ... which we assume is sh''' |
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38 if re.match('[a-zA-Z0-9@%_+=:,./-]*$', s): |
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39 return s |
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40 return "'%s'" % s.replace("'", "'\\''") |
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41 |
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42 def _forwardoutput(ui, pipe): |
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43 """display all data currently available on pipe as remote output. |
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44 |
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45 This is non blocking.""" |
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46 s = util.readpipe(pipe) |
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47 if s: |
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48 for l in s.splitlines(): |
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49 ui.status(_("remote: "), l, '\n') |
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50 |
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51 class doublepipe(object): |
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52 """Operate a side-channel pipe in addition of a main one |
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53 |
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54 The side-channel pipe contains server output to be forwarded to the user |
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55 input. The double pipe will behave as the "main" pipe, but will ensure the |
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56 content of the "side" pipe is properly processed while we wait for blocking |
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57 call on the "main" pipe. |
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58 |
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59 If large amounts of data are read from "main", the forward will cease after |
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60 the first bytes start to appear. This simplifies the implementation |
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61 without affecting actual output of sshpeer too much as we rarely issue |
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62 large read for data not yet emitted by the server. |
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63 |
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64 The main pipe is expected to be a 'bufferedinputpipe' from the util module |
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65 that handle all the os specific bites. This class lives in this module |
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66 because it focus on behavior specific to the ssh protocol.""" |
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67 |
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68 def __init__(self, ui, main, side): |
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69 self._ui = ui |
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70 self._main = main |
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71 self._side = side |
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72 |
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73 def _wait(self): |
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74 """wait until some data are available on main or side |
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75 |
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76 return a pair of boolean (ismainready, issideready) |
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77 |
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78 (This will only wait for data if the setup is supported by `util.poll`) |
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79 """ |
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80 if getattr(self._main, 'hasbuffer', False): # getattr for classic pipe |
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81 return (True, True) # main has data, assume side is worth poking at. |
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82 fds = [self._main.fileno(), self._side.fileno()] |
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83 try: |
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84 act = util.poll(fds) |
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85 except NotImplementedError: |
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86 # non supported yet case, assume all have data. |
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87 act = fds |
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88 return (self._main.fileno() in act, self._side.fileno() in act) |
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89 |
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90 def write(self, data): |
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91 return self._call('write', data) |
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92 |
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93 def read(self, size): |
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94 return self._call('read', size) |
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95 |
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96 def readline(self): |
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97 return self._call('readline') |
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98 |
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99 def _call(self, methname, data=None): |
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100 """call <methname> on "main", forward output of "side" while blocking |
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101 """ |
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102 # data can be '' or 0 |
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103 if (data is not None and not data) or self._main.closed: |
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104 _forwardoutput(self._ui, self._side) |
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105 return '' |
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106 while True: |
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107 mainready, sideready = self._wait() |
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108 if sideready: |
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109 _forwardoutput(self._ui, self._side) |
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110 if mainready: |
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111 meth = getattr(self._main, methname) |
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112 if data is None: |
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113 return meth() |
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114 else: |
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115 return meth(data) |
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116 |
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117 def close(self): |
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118 return self._main.close() |
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119 |
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120 def flush(self): |
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121 return self._main.flush() |
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122 |
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123 class sshpeer(wireproto.wirepeer): |
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124 def __init__(self, ui, path, create=False): |
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125 self._url = path |
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126 self.ui = ui |
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127 self.pipeo = self.pipei = self.pipee = None |
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128 |
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129 u = util.url(path, parsequery=False, parsefragment=False) |
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130 if u.scheme != 'ssh' or not u.host or u.path is None: |
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131 self._abort(error.RepoError(_("couldn't parse location %s") % path)) |
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132 |
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133 self.user = u.user |
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134 if u.passwd is not None: |
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135 self._abort(error.RepoError(_("password in URL not supported"))) |
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136 self.host = u.host |
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137 self.port = u.port |
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138 self.path = u.path or "." |
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139 |
961 | 140 sshcmd = self.ui.config("ui", "ssh", "ssh") |
141 remotecmd = self.ui.config("ui", "remotecmd", "hg") | |
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142 |
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143 args = util.sshargs(sshcmd, |
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144 _serverquote(self.host), |
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145 _serverquote(self.user), |
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146 _serverquote(self.port)) |
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147 |
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148 if create: |
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149 cmd = '%s %s %s' % (sshcmd, args, |
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150 util.shellquote("%s init %s" % |
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151 (_serverquote(remotecmd), _serverquote(self.path)))) |
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152 ui.debug('running %s\n' % cmd) |
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153 res = ui.system(cmd) |
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154 if res != 0: |
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155 self._abort(error.RepoError(_("could not create remote repo"))) |
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156 |
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157 self._validaterepo(sshcmd, args, remotecmd) |
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158 |
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159 def url(self): |
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160 return self._url |
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161 |
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162 def _validaterepo(self, sshcmd, args, remotecmd): |
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163 # cleanup up previous run |
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164 self.cleanup() |
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165 |
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166 cmd = '%s %s %s' % (sshcmd, args, |
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167 util.shellquote("%s -R %s serve --stdio" % |
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168 (_serverquote(remotecmd), _serverquote(self.path)))) |
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169 self.ui.debug('running %s\n' % cmd) |
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170 cmd = util.quotecommand(cmd) |
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171 |
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172 # while self.subprocess isn't used, having it allows the subprocess to |
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173 # to clean up correctly later |
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174 # |
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175 # no buffer allow the use of 'select' |
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176 # feel free to remove buffering and select usage when we ultimately |
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177 # move to threading. |
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178 sub = util.popen4(cmd, bufsize=0) |
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179 self.pipeo, self.pipei, self.pipee, self.subprocess = sub |
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180 |
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181 self.pipei = util.bufferedinputpipe(self.pipei) |
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182 self.pipei = doublepipe(self.ui, self.pipei, self.pipee) |
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183 self.pipeo = doublepipe(self.ui, self.pipeo, self.pipee) |
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184 |
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185 # skip any noise generated by remote shell |
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186 self._callstream("hello") |
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187 r = self._callstream("between", pairs=("%s-%s" % ("0"*40, "0"*40))) |
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188 lines = ["", "dummy"] |
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189 max_noise = 500 |
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190 while lines[-1] and max_noise: |
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191 l = r.readline() |
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192 self.readerr() |
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193 if lines[-1] == "1\n" and l == "\n": |
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194 break |
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195 if l: |
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196 self.ui.debug("remote: ", l) |
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197 lines.append(l) |
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198 max_noise -= 1 |
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199 else: |
16683 | 200 self._abort(error.RepoError(_('no suitable response from ' |
201 'remote hg'))) | |
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202 |
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203 self._caps = set() |
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204 for l in reversed(lines): |
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205 if l.startswith("capabilities:"): |
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206 self._caps.update(l[:-1].split(":")[1].split()) |
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207 break |
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208 |
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209 def _capabilities(self): |
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210 return self._caps |
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211 |
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212 def readerr(self): |
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213 _forwardoutput(self.ui, self.pipee) |
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214 |
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215 def _abort(self, exception): |
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216 self.cleanup() |
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217 raise exception |
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218 |
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219 def cleanup(self): |
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220 if self.pipeo is None: |
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221 return |
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222 self.pipeo.close() |
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223 self.pipei.close() |
817 | 224 try: |
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225 # read the error descriptor until EOF |
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226 for l in self.pipee: |
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227 self.ui.status(_("remote: "), l) |
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228 except (IOError, ValueError): |
817 | 229 pass |
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230 self.pipee.close() |
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231 |
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232 __del__ = cleanup |
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233 |
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234 def _callstream(self, cmd, **args): |
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235 self.ui.debug("sending %s command\n" % cmd) |
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236 self.pipeo.write("%s\n" % cmd) |
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237 _func, names = wireproto.commands[cmd] |
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238 keys = names.split() |
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239 wireargs = {} |
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240 for k in keys: |
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241 if k == '*': |
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242 wireargs['*'] = args |
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243 break |
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244 else: |
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245 wireargs[k] = args[k] |
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246 del args[k] |
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247 for k, v in sorted(wireargs.iteritems()): |
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248 self.pipeo.write("%s %d\n" % (k, len(v))) |
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249 if isinstance(v, dict): |
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250 for dk, dv in v.iteritems(): |
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251 self.pipeo.write("%s %d\n" % (dk, len(dv))) |
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252 self.pipeo.write(dv) |
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253 else: |
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254 self.pipeo.write(v) |
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255 self.pipeo.flush() |
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256 |
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257 return self.pipei |
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258 |
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259 def _callcompressable(self, cmd, **args): |
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260 return self._callstream(cmd, **args) |
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261 |
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262 def _call(self, cmd, **args): |
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263 self._callstream(cmd, **args) |
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264 return self._recv() |
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265 |
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266 def _callpush(self, cmd, fp, **args): |
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267 r = self._call(cmd, **args) |
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268 if r: |
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269 return '', r |
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270 while True: |
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271 d = fp.read(4096) |
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272 if not d: |
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273 break |
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274 self._send(d) |
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275 self._send("", flush=True) |
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276 r = self._recv() |
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277 if r: |
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278 return '', r |
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279 return self._recv(), '' |
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280 |
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281 def _calltwowaystream(self, cmd, fp, **args): |
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282 r = self._call(cmd, **args) |
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283 if r: |
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284 # XXX needs to be made better |
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285 raise error.Abort('unexpected remote reply: %s' % r) |
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286 while True: |
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287 d = fp.read(4096) |
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288 if not d: |
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289 break |
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290 self._send(d) |
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291 self._send("", flush=True) |
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292 return self.pipei |
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293 |
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294 def _recv(self): |
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295 l = self.pipei.readline() |
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296 if l == '\n': |
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297 self.readerr() |
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298 msg = _('check previous remote output') |
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299 self._abort(error.OutOfBandError(hint=msg)) |
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300 self.readerr() |
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301 try: |
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302 l = int(l) |
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303 except ValueError: |
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304 self._abort(error.ResponseError(_("unexpected response:"), l)) |
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305 return self.pipei.read(l) |
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306 |
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307 def _send(self, data, flush=False): |
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308 self.pipeo.write("%d\n" % len(data)) |
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309 if data: |
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310 self.pipeo.write(data) |
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311 if flush: |
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312 self.pipeo.flush() |
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313 self.readerr() |
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314 |
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315 def lock(self): |
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316 self._call("lock") |
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317 return remotelock(self) |
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318 |
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319 def unlock(self): |
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320 self._call("unlock") |
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321 |
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322 def addchangegroup(self, cg, source, url, lock=None): |
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323 '''Send a changegroup to the remote server. Return an integer |
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324 similar to unbundle(). DEPRECATED, since it requires locking the |
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325 remote.''' |
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326 d = self._call("addchangegroup") |
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327 if d: |
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328 self._abort(error.RepoError(_("push refused: %s") % d)) |
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329 while True: |
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330 d = cg.read(4096) |
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331 if not d: |
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332 break |
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333 self.pipeo.write(d) |
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334 self.readerr() |
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335 |
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336 self.pipeo.flush() |
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337 |
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338 self.readerr() |
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339 r = self._recv() |
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340 if not r: |
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341 return 1 |
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342 try: |
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343 return int(r) |
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344 except ValueError: |
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345 self._abort(error.ResponseError(_("unexpected response:"), r)) |
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346 |
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347 instance = sshpeer |