Mercurial > hg
annotate mercurial/wireprotov1peer.py @ 37614:a81d02ea65db
wireproto: move version 1 peer functionality to standalone module (API)
wireproto.py contains code for both the client and the server. There
*should* be a somewhat strong separation between the two.
This commit extracts the client-side code from wireproto.py into a new
module - wireprotov1peer.
Differential Revision: https://phab.mercurial-scm.org/D3259
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Wed, 11 Apr 2018 12:49:08 -0700 |
parents | mercurial/wireproto.py@96d735601ca1 |
children | f3dc8239e3a9 |
rev | line source |
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1 # wireprotov1peer.py - Client-side functionality for wire protocol version 1. |
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2 # |
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3 # Copyright 2005-2010 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 from __future__ import absolute_import |
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9 |
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10 import hashlib |
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11 |
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12 from .i18n import _ |
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13 from .node import ( |
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14 bin, |
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15 ) |
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16 |
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17 from . import ( |
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18 bundle2, |
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19 changegroup as changegroupmod, |
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20 encoding, |
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21 error, |
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22 peer, |
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23 pushkey as pushkeymod, |
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24 pycompat, |
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25 repository, |
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26 util, |
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27 wireprototypes, |
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28 ) |
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29 |
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30 urlreq = util.urlreq |
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31 |
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32 class remoteiterbatcher(peer.iterbatcher): |
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33 def __init__(self, remote): |
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34 super(remoteiterbatcher, self).__init__() |
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35 self._remote = remote |
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36 |
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37 def __getattr__(self, name): |
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38 # Validate this method is batchable, since submit() only supports |
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39 # batchable methods. |
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40 fn = getattr(self._remote, name) |
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41 if not getattr(fn, 'batchable', None): |
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42 raise error.ProgrammingError('Attempted to batch a non-batchable ' |
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43 'call to %r' % name) |
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44 |
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45 return super(remoteiterbatcher, self).__getattr__(name) |
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46 |
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47 def submit(self): |
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48 """Break the batch request into many patch calls and pipeline them. |
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49 |
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50 This is mostly valuable over http where request sizes can be |
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51 limited, but can be used in other places as well. |
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52 """ |
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53 # 2-tuple of (command, arguments) that represents what will be |
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54 # sent over the wire. |
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55 requests = [] |
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56 |
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57 # 4-tuple of (command, final future, @batchable generator, remote |
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58 # future). |
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59 results = [] |
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60 |
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61 for command, args, opts, finalfuture in self.calls: |
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62 mtd = getattr(self._remote, command) |
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63 batchable = mtd.batchable(mtd.__self__, *args, **opts) |
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64 |
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65 commandargs, fremote = next(batchable) |
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66 assert fremote |
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67 requests.append((command, commandargs)) |
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68 results.append((command, finalfuture, batchable, fremote)) |
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69 |
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70 if requests: |
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71 self._resultiter = self._remote._submitbatch(requests) |
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72 |
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73 self._results = results |
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74 |
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75 def results(self): |
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76 for command, finalfuture, batchable, remotefuture in self._results: |
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77 # Get the raw result, set it in the remote future, feed it |
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78 # back into the @batchable generator so it can be decoded, and |
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79 # set the result on the final future to this value. |
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80 remoteresult = next(self._resultiter) |
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81 remotefuture.set(remoteresult) |
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82 finalfuture.set(next(batchable)) |
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83 |
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84 # Verify our @batchable generators only emit 2 values. |
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85 try: |
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86 next(batchable) |
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87 except StopIteration: |
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88 pass |
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89 else: |
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90 raise error.ProgrammingError('%s @batchable generator emitted ' |
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91 'unexpected value count' % command) |
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92 |
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93 yield finalfuture.value |
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94 |
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95 # Forward a couple of names from peer to make wireproto interactions |
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96 # slightly more sensible. |
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97 batchable = peer.batchable |
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98 future = peer.future |
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99 |
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100 def encodebatchcmds(req): |
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101 """Return a ``cmds`` argument value for the ``batch`` command.""" |
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102 escapearg = wireprototypes.escapebatcharg |
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103 |
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104 cmds = [] |
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105 for op, argsdict in req: |
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106 # Old servers didn't properly unescape argument names. So prevent |
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107 # the sending of argument names that may not be decoded properly by |
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108 # servers. |
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109 assert all(escapearg(k) == k for k in argsdict) |
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110 |
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111 args = ','.join('%s=%s' % (escapearg(k), escapearg(v)) |
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112 for k, v in argsdict.iteritems()) |
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113 cmds.append('%s %s' % (op, args)) |
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114 |
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115 return ';'.join(cmds) |
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116 |
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117 class wirepeer(repository.legacypeer): |
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118 """Client-side interface for communicating with a peer repository. |
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119 |
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120 Methods commonly call wire protocol commands of the same name. |
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121 |
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122 See also httppeer.py and sshpeer.py for protocol-specific |
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123 implementations of this interface. |
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124 """ |
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125 # Begin of ipeercommands interface. |
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126 |
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127 def iterbatch(self): |
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128 return remoteiterbatcher(self) |
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129 |
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130 @batchable |
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131 def lookup(self, key): |
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132 self.requirecap('lookup', _('look up remote revision')) |
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133 f = future() |
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134 yield {'key': encoding.fromlocal(key)}, f |
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135 d = f.value |
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136 success, data = d[:-1].split(" ", 1) |
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137 if int(success): |
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138 yield bin(data) |
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139 else: |
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140 self._abort(error.RepoError(data)) |
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141 |
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142 @batchable |
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143 def heads(self): |
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144 f = future() |
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145 yield {}, f |
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146 d = f.value |
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147 try: |
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148 yield wireprototypes.decodelist(d[:-1]) |
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149 except ValueError: |
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150 self._abort(error.ResponseError(_("unexpected response:"), d)) |
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151 |
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152 @batchable |
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153 def known(self, nodes): |
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154 f = future() |
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155 yield {'nodes': wireprototypes.encodelist(nodes)}, f |
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156 d = f.value |
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157 try: |
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158 yield [bool(int(b)) for b in d] |
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159 except ValueError: |
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160 self._abort(error.ResponseError(_("unexpected response:"), d)) |
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161 |
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162 @batchable |
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163 def branchmap(self): |
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164 f = future() |
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165 yield {}, f |
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166 d = f.value |
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167 try: |
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168 branchmap = {} |
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169 for branchpart in d.splitlines(): |
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170 branchname, branchheads = branchpart.split(' ', 1) |
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171 branchname = encoding.tolocal(urlreq.unquote(branchname)) |
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172 branchheads = wireprototypes.decodelist(branchheads) |
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173 branchmap[branchname] = branchheads |
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174 yield branchmap |
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175 except TypeError: |
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176 self._abort(error.ResponseError(_("unexpected response:"), d)) |
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177 |
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178 @batchable |
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179 def listkeys(self, namespace): |
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180 if not self.capable('pushkey'): |
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181 yield {}, None |
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182 f = future() |
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183 self.ui.debug('preparing listkeys for "%s"\n' % namespace) |
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184 yield {'namespace': encoding.fromlocal(namespace)}, f |
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185 d = f.value |
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186 self.ui.debug('received listkey for "%s": %i bytes\n' |
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187 % (namespace, len(d))) |
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188 yield pushkeymod.decodekeys(d) |
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189 |
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190 @batchable |
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191 def pushkey(self, namespace, key, old, new): |
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192 if not self.capable('pushkey'): |
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193 yield False, None |
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194 f = future() |
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195 self.ui.debug('preparing pushkey for "%s:%s"\n' % (namespace, key)) |
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196 yield {'namespace': encoding.fromlocal(namespace), |
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197 'key': encoding.fromlocal(key), |
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198 'old': encoding.fromlocal(old), |
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|
199 'new': encoding.fromlocal(new)}, f |
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200 d = f.value |
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|
201 d, output = d.split('\n', 1) |
13450
b3f9af7c22c5
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|
202 try: |
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|
203 d = bool(int(d)) |
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|
204 except ValueError: |
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|
205 raise error.ResponseError( |
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|
206 _('push failed (unexpected response):'), d) |
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|
207 for l in output.splitlines(True): |
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|
208 self.ui.status(_('remote: '), l) |
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209 yield d |
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|
210 |
11588
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11587
diff
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|
211 def stream_out(self): |
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|
212 return self._callstream('stream_out') |
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213 |
21646
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getbundle: declare type of parameters
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|
214 def getbundle(self, source, **kwargs): |
34739
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parents:
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|
215 kwargs = pycompat.byteskwargs(kwargs) |
13741
b51bf961b3cb
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13726
diff
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|
216 self.requirecap('getbundle', _('look up remote changes')) |
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|
217 opts = {} |
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diff
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|
218 bundlecaps = kwargs.get('bundlecaps') or set() |
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|
219 for key, value in kwargs.iteritems(): |
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|
220 if value is None: |
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|
221 continue |
37613
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|
222 keytype = wireprototypes.GETBUNDLE_ARGUMENTS.get(key) |
21646
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|
223 if keytype is None: |
34730
6be264009841
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diff
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|
224 raise error.ProgrammingError( |
6be264009841
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diff
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|
225 'Unexpectedly None keytype for key %s' % key) |
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|
226 elif keytype == 'nodes': |
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|
227 value = wireprototypes.encodelist(value) |
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diff
changeset
|
228 elif keytype == 'csv': |
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changeset
|
229 value = ','.join(value) |
37412
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diff
changeset
|
230 elif keytype == 'scsv': |
1d459f61b42a
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diff
changeset
|
231 value = ','.join(sorted(value)) |
21988
12cd3827b860
wireproto: add a ``boolean`` type for getbundle parameters
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parents:
21728
diff
changeset
|
232 elif keytype == 'boolean': |
22351
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233 value = '%i' % bool(value) |
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234 elif keytype != 'plain': |
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235 raise KeyError('unknown getbundle option type %s' |
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236 % keytype) |
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237 opts[key] = value |
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238 f = self._callcompressable("getbundle", **pycompat.strkwargs(opts)) |
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239 if any((cap.startswith('HG2') for cap in bundlecaps)): |
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240 return bundle2.getunbundler(self.ui, f) |
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241 else: |
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242 return changegroupmod.cg1unpacker(f, 'UN') |
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243 |
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244 def unbundle(self, cg, heads, url): |
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245 '''Send cg (a readable file-like object representing the |
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246 changegroup to push, typically a chunkbuffer object) to the |
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247 remote server as a bundle. |
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248 |
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249 When pushing a bundle10 stream, return an integer indicating the |
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250 result of the push (see changegroup.apply()). |
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251 |
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252 When pushing a bundle20 stream, return a bundle20 stream. |
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253 |
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254 `url` is the url the client thinks it's pushing to, which is |
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255 visible to hooks. |
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256 ''' |
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257 |
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258 if heads != ['force'] and self.capable('unbundlehash'): |
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259 heads = wireprototypes.encodelist( |
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260 ['hashed', hashlib.sha1(''.join(sorted(heads))).digest()]) |
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261 else: |
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262 heads = wireprototypes.encodelist(heads) |
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263 |
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264 if util.safehasattr(cg, 'deltaheader'): |
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265 # this a bundle10, do the old style call sequence |
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266 ret, output = self._callpush("unbundle", cg, heads=heads) |
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267 if ret == "": |
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268 raise error.ResponseError( |
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269 _('push failed:'), output) |
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270 try: |
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271 ret = int(ret) |
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272 except ValueError: |
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273 raise error.ResponseError( |
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274 _('push failed (unexpected response):'), ret) |
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275 |
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276 for l in output.splitlines(True): |
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277 self.ui.status(_('remote: '), l) |
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278 else: |
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279 # bundle2 push. Send a stream, fetch a stream. |
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280 stream = self._calltwowaystream('unbundle', cg, heads=heads) |
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281 ret = bundle2.getunbundler(self.ui, stream) |
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282 return ret |
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283 |
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284 # End of ipeercommands interface. |
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285 |
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286 # Begin of ipeerlegacycommands interface. |
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287 |
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288 def branches(self, nodes): |
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289 n = wireprototypes.encodelist(nodes) |
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290 d = self._call("branches", nodes=n) |
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291 try: |
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292 br = [tuple(wireprototypes.decodelist(b)) for b in d.splitlines()] |
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293 return br |
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294 except ValueError: |
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295 self._abort(error.ResponseError(_("unexpected response:"), d)) |
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296 |
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297 def between(self, pairs): |
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298 batch = 8 # avoid giant requests |
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299 r = [] |
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300 for i in xrange(0, len(pairs), batch): |
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301 n = " ".join([wireprototypes.encodelist(p, '-') |
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302 for p in pairs[i:i + batch]]) |
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303 d = self._call("between", pairs=n) |
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304 try: |
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305 r.extend(l and wireprototypes.decodelist(l) or [] |
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306 for l in d.splitlines()) |
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307 except ValueError: |
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308 self._abort(error.ResponseError(_("unexpected response:"), d)) |
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309 return r |
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310 |
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311 def changegroup(self, nodes, kind): |
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312 n = wireprototypes.encodelist(nodes) |
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313 f = self._callcompressable("changegroup", roots=n) |
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314 return changegroupmod.cg1unpacker(f, 'UN') |
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315 |
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316 def changegroupsubset(self, bases, heads, kind): |
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317 self.requirecap('changegroupsubset', _('look up remote changes')) |
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318 bases = wireprototypes.encodelist(bases) |
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319 heads = wireprototypes.encodelist(heads) |
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320 f = self._callcompressable("changegroupsubset", |
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321 bases=bases, heads=heads) |
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322 return changegroupmod.cg1unpacker(f, 'UN') |
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323 |
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324 # End of ipeerlegacycommands interface. |
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325 |
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326 def _submitbatch(self, req): |
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327 """run batch request <req> on the server |
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328 |
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329 Returns an iterator of the raw responses from the server. |
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330 """ |
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331 ui = self.ui |
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332 if ui.debugflag and ui.configbool('devel', 'debug.peer-request'): |
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333 ui.debug('devel-peer-request: batched-content\n') |
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334 for op, args in req: |
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335 msg = 'devel-peer-request: - %s (%d arguments)\n' |
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336 ui.debug(msg % (op, len(args))) |
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337 |
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338 unescapearg = wireprototypes.unescapebatcharg |
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339 |
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340 rsp = self._callstream("batch", cmds=encodebatchcmds(req)) |
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341 chunk = rsp.read(1024) |
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342 work = [chunk] |
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343 while chunk: |
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344 while ';' not in chunk and chunk: |
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345 chunk = rsp.read(1024) |
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346 work.append(chunk) |
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347 merged = ''.join(work) |
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348 while ';' in merged: |
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349 one, merged = merged.split(';', 1) |
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350 yield unescapearg(one) |
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351 chunk = rsp.read(1024) |
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352 work = [merged, chunk] |
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353 yield unescapearg(''.join(work)) |
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354 |
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355 def _submitone(self, op, args): |
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356 return self._call(op, **pycompat.strkwargs(args)) |
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357 |
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358 def debugwireargs(self, one, two, three=None, four=None, five=None): |
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359 # don't pass optional arguments left at their default value |
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360 opts = {} |
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361 if three is not None: |
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362 opts[r'three'] = three |
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363 if four is not None: |
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364 opts[r'four'] = four |
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365 return self._call('debugwireargs', one=one, two=two, **opts) |
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366 |
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367 def _call(self, cmd, **args): |
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368 """execute <cmd> on the server |
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369 |
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370 The command is expected to return a simple string. |
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371 |
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372 returns the server reply as a string.""" |
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373 raise NotImplementedError() |
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374 |
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375 def _callstream(self, cmd, **args): |
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376 """execute <cmd> on the server |
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377 |
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378 The command is expected to return a stream. Note that if the |
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379 command doesn't return a stream, _callstream behaves |
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380 differently for ssh and http peers. |
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381 |
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382 returns the server reply as a file like object. |
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383 """ |
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384 raise NotImplementedError() |
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385 |
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386 def _callcompressable(self, cmd, **args): |
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387 """execute <cmd> on the server |
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388 |
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389 The command is expected to return a stream. |
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390 |
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391 The stream may have been compressed in some implementations. This |
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392 function takes care of the decompression. This is the only difference |
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393 with _callstream. |
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394 |
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395 returns the server reply as a file like object. |
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396 """ |
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397 raise NotImplementedError() |
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398 |
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399 def _callpush(self, cmd, fp, **args): |
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400 """execute a <cmd> on server |
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401 |
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402 The command is expected to be related to a push. Push has a special |
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403 return method. |
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404 |
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405 returns the server reply as a (ret, output) tuple. ret is either |
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406 empty (error) or a stringified int. |
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407 """ |
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408 raise NotImplementedError() |
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409 |
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410 def _calltwowaystream(self, cmd, fp, **args): |
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411 """execute <cmd> on server |
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412 |
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413 The command will send a stream to the server and get a stream in reply. |
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414 """ |
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415 raise NotImplementedError() |
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416 |
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417 def _abort(self, exception): |
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418 """clearly abort the wire protocol connection and raise the exception |
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419 """ |
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420 raise NotImplementedError() |