Mercurial > hg
annotate mercurial/sshpeer.py @ 30068:a76d5ba7ac43
pull: grab wlock during pull
because pull might move bookmarks and bookmark are protected by wlock, we have
to grab wlock for pull :-(
This required a small upgrade of the 'lockdelay' extension used by
'test-clone.t' because the delay must apply to a single lock only.
author | Pierre-Yves David <pierre-yves.david@ens-lyon.org> |
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date | Tue, 23 Aug 2016 23:47:59 +0200 |
parents | bb04f96df51c |
children | 764f4581d1f3 |
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 _submitbatch(self, req): |
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235 rsp = self._callstream("batch", cmds=wireproto.encodebatchcmds(req)) |
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236 available = self._getamount() |
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237 # TODO this response parsing is probably suboptimal for large |
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238 # batches with large responses. |
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239 toread = min(available, 1024) |
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240 work = rsp.read(toread) |
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241 available -= toread |
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242 chunk = work |
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243 while chunk: |
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244 while ';' in work: |
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245 one, work = work.split(';', 1) |
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246 yield wireproto.unescapearg(one) |
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247 toread = min(available, 1024) |
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248 chunk = rsp.read(toread) |
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249 available -= toread |
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250 work += chunk |
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251 yield wireproto.unescapearg(work) |
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252 |
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253 def _callstream(self, cmd, **args): |
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254 self.ui.debug("sending %s command\n" % cmd) |
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255 self.pipeo.write("%s\n" % cmd) |
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256 _func, names = wireproto.commands[cmd] |
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257 keys = names.split() |
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258 wireargs = {} |
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259 for k in keys: |
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260 if k == '*': |
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261 wireargs['*'] = args |
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262 break |
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263 else: |
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264 wireargs[k] = args[k] |
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265 del args[k] |
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266 for k, v in sorted(wireargs.iteritems()): |
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267 self.pipeo.write("%s %d\n" % (k, len(v))) |
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268 if isinstance(v, dict): |
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269 for dk, dv in v.iteritems(): |
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270 self.pipeo.write("%s %d\n" % (dk, len(dv))) |
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271 self.pipeo.write(dv) |
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272 else: |
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273 self.pipeo.write(v) |
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274 self.pipeo.flush() |
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275 |
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276 return self.pipei |
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277 |
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278 def _callcompressable(self, cmd, **args): |
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279 return self._callstream(cmd, **args) |
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280 |
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281 def _call(self, cmd, **args): |
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282 self._callstream(cmd, **args) |
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283 return self._recv() |
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284 |
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285 def _callpush(self, cmd, fp, **args): |
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286 r = self._call(cmd, **args) |
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287 if r: |
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288 return '', r |
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289 for d in iter(lambda: fp.read(4096), ''): |
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290 self._send(d) |
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291 self._send("", flush=True) |
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292 r = self._recv() |
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293 if r: |
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294 return '', r |
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295 return self._recv(), '' |
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296 |
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297 def _calltwowaystream(self, cmd, fp, **args): |
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298 r = self._call(cmd, **args) |
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299 if r: |
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300 # XXX needs to be made better |
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301 raise error.Abort(_('unexpected remote reply: %s') % r) |
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302 for d in iter(lambda: fp.read(4096), ''): |
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303 self._send(d) |
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304 self._send("", flush=True) |
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305 return self.pipei |
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306 |
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307 def _getamount(self): |
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308 l = self.pipei.readline() |
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309 if l == '\n': |
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310 self.readerr() |
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311 msg = _('check previous remote output') |
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312 self._abort(error.OutOfBandError(hint=msg)) |
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313 self.readerr() |
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314 try: |
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315 return int(l) |
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316 except ValueError: |
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317 self._abort(error.ResponseError(_("unexpected response:"), l)) |
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318 |
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319 def _recv(self): |
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320 return self.pipei.read(self._getamount()) |
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321 |
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322 def _send(self, data, flush=False): |
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323 self.pipeo.write("%d\n" % len(data)) |
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324 if data: |
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325 self.pipeo.write(data) |
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326 if flush: |
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327 self.pipeo.flush() |
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328 self.readerr() |
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329 |
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330 def lock(self): |
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331 self._call("lock") |
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332 return remotelock(self) |
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333 |
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334 def unlock(self): |
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335 self._call("unlock") |
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336 |
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337 def addchangegroup(self, cg, source, url, lock=None): |
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338 '''Send a changegroup to the remote server. Return an integer |
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339 similar to unbundle(). DEPRECATED, since it requires locking the |
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340 remote.''' |
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341 d = self._call("addchangegroup") |
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342 if d: |
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343 self._abort(error.RepoError(_("push refused: %s") % d)) |
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344 for d in iter(lambda: cg.read(4096), ''): |
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345 self.pipeo.write(d) |
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346 self.readerr() |
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347 |
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348 self.pipeo.flush() |
31cebba881a0
Add addchangegroup to the ssh protocol
Matt Mackall <mpm@selenic.com>
parents:
638
diff
changeset
|
349 |
646
342927da4f4c
Show remote client output with "remote:"
Matt Mackall <mpm@selenic.com>
parents:
644
diff
changeset
|
350 self.readerr() |
5978
7939c71f3132
sshrepo: be more careful while reading data
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
5293
diff
changeset
|
351 r = self._recv() |
2019
ced2d3620f95
add merge command. means same thing as "update -m".
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
1736
diff
changeset
|
352 if not r: |
ced2d3620f95
add merge command. means same thing as "update -m".
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
1736
diff
changeset
|
353 return 1 |
5978
7939c71f3132
sshrepo: be more careful while reading data
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
5293
diff
changeset
|
354 try: |
7939c71f3132
sshrepo: be more careful while reading data
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
5293
diff
changeset
|
355 return int(r) |
14004
97ed99d1f419
eliminate various naked except clauses
Idan Kamara <idankk86@gmail.com>
parents:
13827
diff
changeset
|
356 except ValueError: |
11590
0b15aee0a306
protocol: convert some ssh abort calls
Matt Mackall <mpm@selenic.com>
parents:
11589
diff
changeset
|
357 self._abort(error.ResponseError(_("unexpected response:"), r)) |
2612
ffb895f16925
add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
2549
diff
changeset
|
358 |
17192
1ac628cd7113
peer: introduce real peer classes
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
16688
diff
changeset
|
359 instance = sshpeer |