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1 # sshpeer.py - ssh repository proxy class for mercurial |
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2 # |
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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 |
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6 # GNU General Public License version 2 or any later version. |
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7 |
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8 import re |
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9 from i18n import _ |
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10 import util, error, wireproto |
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11 |
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12 class remotelock(object): |
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13 def __init__(self, repo): |
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14 self.repo = repo |
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15 def release(self): |
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16 self.repo.unlock() |
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17 self.repo = None |
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18 def __del__(self): |
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19 if self.repo: |
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20 self.release() |
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21 |
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22 def _serverquote(s): |
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23 '''quote a string for the remote shell ... which we assume is sh''' |
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24 if re.match('[a-zA-Z0-9@%_+=:,./-]*$', s): |
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25 return s |
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26 return "'%s'" % s.replace("'", "'\\''") |
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27 |
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28 class sshpeer(wireproto.wirepeer): |
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29 def __init__(self, ui, path, create=False): |
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30 self._url = path |
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31 self.ui = ui |
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32 self.pipeo = self.pipei = self.pipee = None |
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33 |
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34 u = util.url(path, parsequery=False, parsefragment=False) |
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35 if u.scheme != 'ssh' or not u.host or u.path is None: |
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36 self._abort(error.RepoError(_("couldn't parse location %s") % path)) |
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37 |
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38 self.user = u.user |
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39 if u.passwd is not None: |
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40 self._abort(error.RepoError(_("password in URL not supported"))) |
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41 self.host = u.host |
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42 self.port = u.port |
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43 self.path = u.path or "." |
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44 |
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45 sshcmd = self.ui.config("ui", "ssh", "ssh") |
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46 remotecmd = self.ui.config("ui", "remotecmd", "hg") |
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47 |
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48 args = util.sshargs(sshcmd, self.host, self.user, self.port) |
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49 |
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50 if create: |
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51 cmd = '%s %s %s' % (sshcmd, args, |
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52 util.shellquote("%s init %s" % |
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53 (_serverquote(remotecmd), _serverquote(self.path)))) |
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54 ui.note(_('running %s\n') % cmd) |
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55 res = util.system(cmd) |
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56 if res != 0: |
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57 self._abort(error.RepoError(_("could not create remote repo"))) |
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58 |
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59 self.validate_repo(ui, sshcmd, args, remotecmd) |
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60 |
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61 def url(self): |
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62 return self._url |
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63 |
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64 def validate_repo(self, ui, sshcmd, args, remotecmd): |
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65 # cleanup up previous run |
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66 self.cleanup() |
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67 |
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68 cmd = '%s %s %s' % (sshcmd, args, |
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69 util.shellquote("%s -R %s serve --stdio" % |
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70 (_serverquote(remotecmd), _serverquote(self.path)))) |
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71 ui.note(_('running %s\n') % cmd) |
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72 cmd = util.quotecommand(cmd) |
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73 self.pipeo, self.pipei, self.pipee = util.popen3(cmd) |
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74 |
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75 # skip any noise generated by remote shell |
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76 self._callstream("hello") |
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77 r = self._callstream("between", pairs=("%s-%s" % ("0"*40, "0"*40))) |
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78 lines = ["", "dummy"] |
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79 max_noise = 500 |
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80 while lines[-1] and max_noise: |
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81 l = r.readline() |
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82 self.readerr() |
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83 if lines[-1] == "1\n" and l == "\n": |
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84 break |
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85 if l: |
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86 ui.debug("remote: ", l) |
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87 lines.append(l) |
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88 max_noise -= 1 |
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89 else: |
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90 self._abort(error.RepoError(_('no suitable response from ' |
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91 'remote hg'))) |
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92 |
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93 self._caps = set() |
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94 for l in reversed(lines): |
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95 if l.startswith("capabilities:"): |
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96 self._caps.update(l[:-1].split(":")[1].split()) |
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97 break |
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98 |
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99 def _capabilities(self): |
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100 return self._caps |
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101 |
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102 def readerr(self): |
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103 while True: |
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104 size = util.fstat(self.pipee).st_size |
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105 if size == 0: |
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106 break |
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107 s = self.pipee.read(size) |
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108 if not s: |
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109 break |
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110 for l in s.splitlines(): |
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111 self.ui.status(_("remote: "), l, '\n') |
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112 |
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113 def _abort(self, exception): |
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114 self.cleanup() |
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115 raise exception |
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116 |
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117 def cleanup(self): |
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118 if self.pipeo is None: |
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119 return |
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120 self.pipeo.close() |
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121 self.pipei.close() |
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122 try: |
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123 # read the error descriptor until EOF |
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124 for l in self.pipee: |
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125 self.ui.status(_("remote: "), l) |
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126 except (IOError, ValueError): |
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127 pass |
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128 self.pipee.close() |
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129 |
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130 __del__ = cleanup |
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131 |
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132 def _callstream(self, cmd, **args): |
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133 self.ui.debug("sending %s command\n" % cmd) |
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134 self.pipeo.write("%s\n" % cmd) |
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135 _func, names = wireproto.commands[cmd] |
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136 keys = names.split() |
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137 wireargs = {} |
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138 for k in keys: |
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139 if k == '*': |
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140 wireargs['*'] = args |
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141 break |
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142 else: |
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143 wireargs[k] = args[k] |
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144 del args[k] |
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145 for k, v in sorted(wireargs.iteritems()): |
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146 self.pipeo.write("%s %d\n" % (k, len(v))) |
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147 if isinstance(v, dict): |
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148 for dk, dv in v.iteritems(): |
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149 self.pipeo.write("%s %d\n" % (dk, len(dv))) |
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150 self.pipeo.write(dv) |
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151 else: |
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152 self.pipeo.write(v) |
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153 self.pipeo.flush() |
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154 |
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155 return self.pipei |
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156 |
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157 def _call(self, cmd, **args): |
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158 self._callstream(cmd, **args) |
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159 return self._recv() |
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160 |
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161 def _callpush(self, cmd, fp, **args): |
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162 r = self._call(cmd, **args) |
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163 if r: |
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164 return '', r |
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165 while True: |
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166 d = fp.read(4096) |
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167 if not d: |
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168 break |
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169 self._send(d) |
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170 self._send("", flush=True) |
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171 r = self._recv() |
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172 if r: |
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173 return '', r |
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174 return self._recv(), '' |
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175 |
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176 def _decompress(self, stream): |
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177 return stream |
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178 |
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179 def _recv(self): |
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180 l = self.pipei.readline() |
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181 if l == '\n': |
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182 err = [] |
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183 while True: |
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184 line = self.pipee.readline() |
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185 if line == '-\n': |
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186 break |
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187 err.extend([line]) |
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188 if len(err) > 0: |
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189 # strip the trailing newline added to the last line server-side |
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190 err[-1] = err[-1][:-1] |
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191 self._abort(error.OutOfBandError(*err)) |
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192 self.readerr() |
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193 try: |
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194 l = int(l) |
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195 except ValueError: |
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196 self._abort(error.ResponseError(_("unexpected response:"), l)) |
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197 return self.pipei.read(l) |
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198 |
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199 def _send(self, data, flush=False): |
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200 self.pipeo.write("%d\n" % len(data)) |
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201 if data: |
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202 self.pipeo.write(data) |
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203 if flush: |
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204 self.pipeo.flush() |
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205 self.readerr() |
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206 |
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207 def lock(self): |
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208 self._call("lock") |
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209 return remotelock(self) |
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210 |
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211 def unlock(self): |
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212 self._call("unlock") |
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213 |
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214 def addchangegroup(self, cg, source, url, lock=None): |
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215 '''Send a changegroup to the remote server. Return an integer |
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216 similar to unbundle(). DEPRECATED, since it requires locking the |
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217 remote.''' |
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218 d = self._call("addchangegroup") |
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219 if d: |
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220 self._abort(error.RepoError(_("push refused: %s") % d)) |
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221 while True: |
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222 d = cg.read(4096) |
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223 if not d: |
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224 break |
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225 self.pipeo.write(d) |
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226 self.readerr() |
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227 |
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228 self.pipeo.flush() |
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229 |
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230 self.readerr() |
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231 r = self._recv() |
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232 if not r: |
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233 return 1 |
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234 try: |
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235 return int(r) |
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236 except ValueError: |
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237 self._abort(error.ResponseError(_("unexpected response:"), r)) |
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238 |
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239 instance = sshpeer |