Mercurial > hg
annotate mercurial/wireprotov1peer.py @ 37615:f3dc8239e3a9
peer: scatter module to the wind (API)
peer.py hardly contained any code. The code it did contain was
generic to the version 1 peer interface or specific to the
local repository peer.
So code has been moved to wireprotov1peer and localrepo, as
appropriate.
Differential Revision: https://phab.mercurial-scm.org/D3260
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Wed, 11 Apr 2018 12:51:09 -0700 |
parents | a81d02ea65db |
children | e1b32dc4646c |
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 pushkey as pushkeymod, |
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23 pycompat, |
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24 repository, |
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25 util, |
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26 wireprototypes, |
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27 ) |
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28 |
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29 urlreq = util.urlreq |
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30 |
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31 def batchable(f): |
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32 '''annotation for batchable methods |
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33 |
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34 Such methods must implement a coroutine as follows: |
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35 |
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36 @batchable |
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37 def sample(self, one, two=None): |
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38 # Build list of encoded arguments suitable for your wire protocol: |
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39 encargs = [('one', encode(one),), ('two', encode(two),)] |
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40 # Create future for injection of encoded result: |
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41 encresref = future() |
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42 # Return encoded arguments and future: |
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43 yield encargs, encresref |
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44 # Assuming the future to be filled with the result from the batched |
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45 # request now. Decode it: |
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46 yield decode(encresref.value) |
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47 |
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48 The decorator returns a function which wraps this coroutine as a plain |
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49 method, but adds the original method as an attribute called "batchable", |
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50 which is used by remotebatch to split the call into separate encoding and |
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51 decoding phases. |
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52 ''' |
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53 def plain(*args, **opts): |
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54 batchable = f(*args, **opts) |
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55 encargsorres, encresref = next(batchable) |
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56 if not encresref: |
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57 return encargsorres # a local result in this case |
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58 self = args[0] |
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59 cmd = pycompat.bytesurl(f.__name__) # ensure cmd is ascii bytestr |
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60 encresref.set(self._submitone(cmd, encargsorres)) |
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61 return next(batchable) |
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62 setattr(plain, 'batchable', f) |
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63 return plain |
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64 |
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65 class future(object): |
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66 '''placeholder for a value to be set later''' |
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67 def set(self, value): |
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68 if util.safehasattr(self, 'value'): |
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69 raise error.RepoError("future is already set") |
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70 self.value = value |
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71 |
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72 class batcher(object): |
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73 '''base class for batches of commands submittable in a single request |
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74 |
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75 All methods invoked on instances of this class are simply queued and |
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76 return a a future for the result. Once you call submit(), all the queued |
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77 calls are performed and the results set in their respective futures. |
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78 ''' |
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79 def __init__(self): |
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80 self.calls = [] |
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81 def __getattr__(self, name): |
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82 def call(*args, **opts): |
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83 resref = future() |
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84 # Please don't invent non-ascii method names, or you will |
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85 # give core hg a very sad time. |
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86 self.calls.append((name.encode('ascii'), args, opts, resref,)) |
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87 return resref |
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88 return call |
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89 def submit(self): |
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90 raise NotImplementedError() |
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91 |
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92 class iterbatcher(batcher): |
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93 |
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94 def submit(self): |
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95 raise NotImplementedError() |
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96 |
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97 def results(self): |
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98 raise NotImplementedError() |
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99 |
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100 class remoteiterbatcher(iterbatcher): |
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101 def __init__(self, remote): |
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102 super(remoteiterbatcher, self).__init__() |
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103 self._remote = remote |
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104 |
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105 def __getattr__(self, name): |
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106 # Validate this method is batchable, since submit() only supports |
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107 # batchable methods. |
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108 fn = getattr(self._remote, name) |
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109 if not getattr(fn, 'batchable', None): |
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110 raise error.ProgrammingError('Attempted to batch a non-batchable ' |
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111 'call to %r' % name) |
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112 |
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113 return super(remoteiterbatcher, self).__getattr__(name) |
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114 |
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115 def submit(self): |
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116 """Break the batch request into many patch calls and pipeline them. |
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117 |
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118 This is mostly valuable over http where request sizes can be |
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119 limited, but can be used in other places as well. |
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120 """ |
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121 # 2-tuple of (command, arguments) that represents what will be |
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122 # sent over the wire. |
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123 requests = [] |
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124 |
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125 # 4-tuple of (command, final future, @batchable generator, remote |
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126 # future). |
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127 results = [] |
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128 |
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129 for command, args, opts, finalfuture in self.calls: |
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130 mtd = getattr(self._remote, command) |
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131 batchable = mtd.batchable(mtd.__self__, *args, **opts) |
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132 |
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133 commandargs, fremote = next(batchable) |
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134 assert fremote |
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135 requests.append((command, commandargs)) |
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136 results.append((command, finalfuture, batchable, fremote)) |
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137 |
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138 if requests: |
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139 self._resultiter = self._remote._submitbatch(requests) |
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140 |
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141 self._results = results |
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142 |
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143 def results(self): |
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144 for command, finalfuture, batchable, remotefuture in self._results: |
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145 # Get the raw result, set it in the remote future, feed it |
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146 # back into the @batchable generator so it can be decoded, and |
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147 # set the result on the final future to this value. |
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148 remoteresult = next(self._resultiter) |
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149 remotefuture.set(remoteresult) |
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150 finalfuture.set(next(batchable)) |
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151 |
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152 # Verify our @batchable generators only emit 2 values. |
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153 try: |
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154 next(batchable) |
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155 except StopIteration: |
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156 pass |
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157 else: |
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158 raise error.ProgrammingError('%s @batchable generator emitted ' |
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159 'unexpected value count' % command) |
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160 |
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161 yield finalfuture.value |
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162 |
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163 def encodebatchcmds(req): |
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164 """Return a ``cmds`` argument value for the ``batch`` command.""" |
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165 escapearg = wireprototypes.escapebatcharg |
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166 |
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167 cmds = [] |
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168 for op, argsdict in req: |
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169 # Old servers didn't properly unescape argument names. So prevent |
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170 # the sending of argument names that may not be decoded properly by |
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171 # servers. |
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172 assert all(escapearg(k) == k for k in argsdict) |
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173 |
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174 args = ','.join('%s=%s' % (escapearg(k), escapearg(v)) |
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175 for k, v in argsdict.iteritems()) |
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176 cmds.append('%s %s' % (op, args)) |
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177 |
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178 return ';'.join(cmds) |
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179 |
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180 class wirepeer(repository.legacypeer): |
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181 """Client-side interface for communicating with a peer repository. |
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182 |
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183 Methods commonly call wire protocol commands of the same name. |
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184 |
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185 See also httppeer.py and sshpeer.py for protocol-specific |
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186 implementations of this interface. |
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187 """ |
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188 # Begin of ipeercommands interface. |
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189 |
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190 def iterbatch(self): |
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191 return remoteiterbatcher(self) |
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192 |
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193 @batchable |
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194 def lookup(self, key): |
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195 self.requirecap('lookup', _('look up remote revision')) |
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196 f = future() |
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197 yield {'key': encoding.fromlocal(key)}, f |
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198 d = f.value |
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199 success, data = d[:-1].split(" ", 1) |
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200 if int(success): |
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201 yield bin(data) |
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202 else: |
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203 self._abort(error.RepoError(data)) |
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204 |
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205 @batchable |
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206 def heads(self): |
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207 f = future() |
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208 yield {}, f |
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209 d = f.value |
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210 try: |
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211 yield wireprototypes.decodelist(d[:-1]) |
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212 except ValueError: |
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213 self._abort(error.ResponseError(_("unexpected response:"), d)) |
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214 |
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215 @batchable |
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216 def known(self, nodes): |
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217 f = future() |
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218 yield {'nodes': wireprototypes.encodelist(nodes)}, f |
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219 d = f.value |
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220 try: |
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221 yield [bool(int(b)) for b in d] |
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222 except ValueError: |
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223 self._abort(error.ResponseError(_("unexpected response:"), d)) |
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224 |
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225 @batchable |
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226 def branchmap(self): |
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227 f = future() |
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228 yield {}, f |
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229 d = f.value |
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230 try: |
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231 branchmap = {} |
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232 for branchpart in d.splitlines(): |
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233 branchname, branchheads = branchpart.split(' ', 1) |
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234 branchname = encoding.tolocal(urlreq.unquote(branchname)) |
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235 branchheads = wireprototypes.decodelist(branchheads) |
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236 branchmap[branchname] = branchheads |
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237 yield branchmap |
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238 except TypeError: |
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239 self._abort(error.ResponseError(_("unexpected response:"), d)) |
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240 |
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241 @batchable |
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242 def listkeys(self, namespace): |
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243 if not self.capable('pushkey'): |
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244 yield {}, None |
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245 f = future() |
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246 self.ui.debug('preparing listkeys for "%s"\n' % namespace) |
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247 yield {'namespace': encoding.fromlocal(namespace)}, f |
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248 d = f.value |
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249 self.ui.debug('received listkey for "%s": %i bytes\n' |
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250 % (namespace, len(d))) |
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251 yield pushkeymod.decodekeys(d) |
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252 |
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253 @batchable |
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254 def pushkey(self, namespace, key, old, new): |
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255 if not self.capable('pushkey'): |
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256 yield False, None |
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257 f = future() |
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258 self.ui.debug('preparing pushkey for "%s:%s"\n' % (namespace, key)) |
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259 yield {'namespace': encoding.fromlocal(namespace), |
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260 'key': encoding.fromlocal(key), |
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261 'old': encoding.fromlocal(old), |
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262 'new': encoding.fromlocal(new)}, f |
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263 d = f.value |
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264 d, output = d.split('\n', 1) |
13450
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265 try: |
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266 d = bool(int(d)) |
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267 except ValueError: |
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268 raise error.ResponseError( |
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269 _('push failed (unexpected response):'), d) |
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270 for l in output.splitlines(True): |
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271 self.ui.status(_('remote: '), l) |
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272 yield d |
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273 |
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274 def stream_out(self): |
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275 return self._callstream('stream_out') |
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276 |
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277 def getbundle(self, source, **kwargs): |
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278 kwargs = pycompat.byteskwargs(kwargs) |
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279 self.requirecap('getbundle', _('look up remote changes')) |
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280 opts = {} |
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diff
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|
281 bundlecaps = kwargs.get('bundlecaps') or set() |
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282 for key, value in kwargs.iteritems(): |
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283 if value is None: |
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284 continue |
37613
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diff
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|
285 keytype = wireprototypes.GETBUNDLE_ARGUMENTS.get(key) |
21646
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|
286 if keytype is None: |
34730
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|
287 raise error.ProgrammingError( |
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|
288 'Unexpectedly None keytype for key %s' % key) |
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289 elif keytype == 'nodes': |
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290 value = wireprototypes.encodelist(value) |
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|
291 elif keytype == 'csv': |
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|
292 value = ','.join(value) |
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293 elif keytype == 'scsv': |
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|
294 value = ','.join(sorted(value)) |
21988
12cd3827b860
wireproto: add a ``boolean`` type for getbundle parameters
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|
295 elif keytype == 'boolean': |
22351
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wireprotocol: fix 'boolean' handling
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diff
changeset
|
296 value = '%i' % bool(value) |
21646
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297 elif keytype != 'plain': |
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298 raise KeyError('unknown getbundle option type %s' |
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|
299 % keytype) |
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|
300 opts[key] = value |
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changeset
|
301 f = self._callcompressable("getbundle", **pycompat.strkwargs(opts)) |
25149
3f0744eeaeaf
cleanup: use __builtins__.any instead of util.any
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parents:
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diff
changeset
|
302 if any((cap.startswith('HG2') for cap in bundlecaps)): |
24641
60fecc5b14a4
unbundle20: retrieve unbundler instances through a factory function
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changeset
|
303 return bundle2.getunbundler(self.ui, f) |
21069
0a9cae236738
bundle2: allow bundle2 for pulling over the wire
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parents:
21064
diff
changeset
|
304 else: |
22390
e2806b8613ca
changegroup: rename bundle-related functions and classes
Sune Foldager <cryo@cyanite.org>
parents:
22353
diff
changeset
|
305 return changegroupmod.cg1unpacker(f, 'UN') |
13741
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diff
changeset
|
306 |
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diff
changeset
|
307 def unbundle(self, cg, heads, url): |
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changeset
|
308 '''Send cg (a readable file-like object representing the |
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changeset
|
309 changegroup to push, typically a chunkbuffer object) to the |
21075
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|
310 remote server as a bundle. |
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|
311 |
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diff
changeset
|
312 When pushing a bundle10 stream, return an integer indicating the |
32880
4c2a46f89f08
wireproto: update reference to deleted addchangegroup()
Martin von Zweigbergk <martinvonz@google.com>
parents:
32744
diff
changeset
|
313 result of the push (see changegroup.apply()). |
21075
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|
314 |
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changeset
|
315 When pushing a bundle20 stream, return a bundle20 stream. |
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|
316 |
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|
317 `url` is the url the client thinks it's pushing to, which is |
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|
318 visible to hooks. |
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changeset
|
319 ''' |
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diff
changeset
|
320 |
14419
ede7cea1550f
wireproto: do not hash when heads == ['force']
Martin Geisler <mg@aragost.com>
parents:
14093
diff
changeset
|
321 if heads != ['force'] and self.capable('unbundlehash'): |
37612
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|
322 heads = wireprototypes.encodelist( |
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changeset
|
323 ['hashed', hashlib.sha1(''.join(sorted(heads))).digest()]) |
13942
88f0e41d8802
wireproto: allow unbundle with hashed heads parameter (issue2126)
Shuhei Takahashi <takahashi.shuhei@gmail.com>
parents:
13741
diff
changeset
|
324 else: |
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|
325 heads = wireprototypes.encodelist(heads) |
13942
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parents:
13741
diff
changeset
|
326 |
21075
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|
327 if util.safehasattr(cg, 'deltaheader'): |
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changeset
|
328 # this a bundle10, do the old style call sequence |
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changeset
|
329 ret, output = self._callpush("unbundle", cg, heads=heads) |
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changeset
|
330 if ret == "": |
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changeset
|
331 raise error.ResponseError( |
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changeset
|
332 _('push failed:'), output) |
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diff
changeset
|
333 try: |
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changeset
|
334 ret = int(ret) |
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changeset
|
335 except ValueError: |
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changeset
|
336 raise error.ResponseError( |
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changeset
|
337 _('push failed (unexpected response):'), ret) |
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changeset
|
338 |
21075
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changeset
|
339 for l in output.splitlines(True): |
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changeset
|
340 self.ui.status(_('remote: '), l) |
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|
341 else: |
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changeset
|
342 # bundle2 push. Send a stream, fetch a stream. |
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diff
changeset
|
343 stream = self._calltwowaystream('unbundle', cg, heads=heads) |
24641
60fecc5b14a4
unbundle20: retrieve unbundler instances through a factory function
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parents:
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diff
changeset
|
344 ret = bundle2.getunbundler(self.ui, stream) |
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diff
changeset
|
345 return ret |
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diff
changeset
|
346 |
37320
39f7d4ee8bcd
repository: port peer interfaces to zope.interface
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37295
diff
changeset
|
347 # End of ipeercommands interface. |
33806
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348 |
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349 # Begin of ipeerlegacycommands interface. |
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350 |
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351 def branches(self, nodes): |
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352 n = wireprototypes.encodelist(nodes) |
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353 d = self._call("branches", nodes=n) |
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354 try: |
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355 br = [tuple(wireprototypes.decodelist(b)) for b in d.splitlines()] |
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356 return br |
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357 except ValueError: |
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358 self._abort(error.ResponseError(_("unexpected response:"), d)) |
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359 |
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360 def between(self, pairs): |
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361 batch = 8 # avoid giant requests |
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362 r = [] |
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363 for i in xrange(0, len(pairs), batch): |
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364 n = " ".join([wireprototypes.encodelist(p, '-') |
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365 for p in pairs[i:i + batch]]) |
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366 d = self._call("between", pairs=n) |
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367 try: |
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368 r.extend(l and wireprototypes.decodelist(l) or [] |
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369 for l in d.splitlines()) |
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370 except ValueError: |
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371 self._abort(error.ResponseError(_("unexpected response:"), d)) |
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372 return r |
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373 |
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374 def changegroup(self, nodes, kind): |
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375 n = wireprototypes.encodelist(nodes) |
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376 f = self._callcompressable("changegroup", roots=n) |
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377 return changegroupmod.cg1unpacker(f, 'UN') |
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378 |
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379 def changegroupsubset(self, bases, heads, kind): |
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380 self.requirecap('changegroupsubset', _('look up remote changes')) |
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381 bases = wireprototypes.encodelist(bases) |
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382 heads = wireprototypes.encodelist(heads) |
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383 f = self._callcompressable("changegroupsubset", |
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384 bases=bases, heads=heads) |
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385 return changegroupmod.cg1unpacker(f, 'UN') |
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386 |
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387 # End of ipeerlegacycommands interface. |
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388 |
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389 def _submitbatch(self, req): |
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390 """run batch request <req> on the server |
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391 |
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392 Returns an iterator of the raw responses from the server. |
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393 """ |
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394 ui = self.ui |
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395 if ui.debugflag and ui.configbool('devel', 'debug.peer-request'): |
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396 ui.debug('devel-peer-request: batched-content\n') |
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397 for op, args in req: |
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398 msg = 'devel-peer-request: - %s (%d arguments)\n' |
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399 ui.debug(msg % (op, len(args))) |
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400 |
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401 unescapearg = wireprototypes.unescapebatcharg |
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402 |
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403 rsp = self._callstream("batch", cmds=encodebatchcmds(req)) |
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404 chunk = rsp.read(1024) |
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405 work = [chunk] |
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406 while chunk: |
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407 while ';' not in chunk and chunk: |
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408 chunk = rsp.read(1024) |
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409 work.append(chunk) |
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410 merged = ''.join(work) |
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411 while ';' in merged: |
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412 one, merged = merged.split(';', 1) |
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413 yield unescapearg(one) |
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414 chunk = rsp.read(1024) |
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415 work = [merged, chunk] |
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416 yield unescapearg(''.join(work)) |
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417 |
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418 def _submitone(self, op, args): |
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419 return self._call(op, **pycompat.strkwargs(args)) |
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420 |
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421 def debugwireargs(self, one, two, three=None, four=None, five=None): |
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422 # don't pass optional arguments left at their default value |
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423 opts = {} |
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424 if three is not None: |
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425 opts[r'three'] = three |
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426 if four is not None: |
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427 opts[r'four'] = four |
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428 return self._call('debugwireargs', one=one, two=two, **opts) |
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429 |
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430 def _call(self, cmd, **args): |
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431 """execute <cmd> on the server |
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432 |
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433 The command is expected to return a simple string. |
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434 |
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435 returns the server reply as a string.""" |
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436 raise NotImplementedError() |
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437 |
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438 def _callstream(self, cmd, **args): |
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439 """execute <cmd> on the server |
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440 |
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441 The command is expected to return a stream. Note that if the |
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442 command doesn't return a stream, _callstream behaves |
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443 differently for ssh and http peers. |
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444 |
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445 returns the server reply as a file like object. |
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446 """ |
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447 raise NotImplementedError() |
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448 |
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449 def _callcompressable(self, cmd, **args): |
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450 """execute <cmd> on the server |
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451 |
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452 The command is expected to return a stream. |
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453 |
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454 The stream may have been compressed in some implementations. This |
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455 function takes care of the decompression. This is the only difference |
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456 with _callstream. |
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457 |
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458 returns the server reply as a file like object. |
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459 """ |
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460 raise NotImplementedError() |
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461 |
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462 def _callpush(self, cmd, fp, **args): |
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463 """execute a <cmd> on server |
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464 |
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465 The command is expected to be related to a push. Push has a special |
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466 return method. |
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467 |
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468 returns the server reply as a (ret, output) tuple. ret is either |
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469 empty (error) or a stringified int. |
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470 """ |
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471 raise NotImplementedError() |
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472 |
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473 def _calltwowaystream(self, cmd, fp, **args): |
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474 """execute <cmd> on server |
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475 |
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476 The command will send a stream to the server and get a stream in reply. |
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477 """ |
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478 raise NotImplementedError() |
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479 |
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480 def _abort(self, exception): |
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481 """clearly abort the wire protocol connection and raise the exception |
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482 """ |
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483 raise NotImplementedError() |