Mercurial > hg
annotate mercurial/commandserver.py @ 15662:06671371e634 stable
progress: check for ui.quiet and ui.debugflag before we write
ui.quiet and ui.debugflag are not initialized during uisetup and
reposetup. progressui is always initialized, therefore we have to check
during write() if ui.quiet is set or not.
author | David Soria Parra <dsp@php.net> |
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date | Wed, 14 Dec 2011 15:41:08 +0100 |
parents | b4c06b97dfe0 |
children | acfca07a8f26 |
rev | line source |
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1 # commandserver.py - communicate with Mercurial's API over a pipe |
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2 # |
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3 # Copyright 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 i18n import _ |
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9 import struct |
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10 import sys, os |
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11 import dispatch, encoding, util |
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12 |
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13 logfile = None |
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14 |
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15 def log(*args): |
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16 if not logfile: |
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17 return |
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18 |
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19 for a in args: |
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20 logfile.write(str(a)) |
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21 |
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22 logfile.flush() |
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23 |
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24 class channeledoutput(object): |
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25 """ |
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26 Write data from in_ to out in the following format: |
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27 |
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28 data length (unsigned int), |
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29 data |
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30 """ |
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31 def __init__(self, in_, out, channel): |
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32 self.in_ = in_ |
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33 self.out = out |
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34 self.channel = channel |
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35 |
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36 def write(self, data): |
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37 if not data: |
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38 return |
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39 self.out.write(struct.pack('>cI', self.channel, len(data))) |
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40 self.out.write(data) |
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41 self.out.flush() |
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42 |
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43 def __getattr__(self, attr): |
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44 if attr in ('isatty', 'fileno'): |
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45 raise AttributeError, attr |
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46 return getattr(self.in_, attr) |
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47 |
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48 class channeledinput(object): |
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49 """ |
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50 Read data from in_. |
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51 |
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52 Requests for input are written to out in the following format: |
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53 channel identifier - 'I' for plain input, 'L' line based (1 byte) |
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54 how many bytes to send at most (unsigned int), |
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55 |
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56 The client replies with: |
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57 data length (unsigned int), 0 meaning EOF |
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58 data |
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59 """ |
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60 |
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61 maxchunksize = 4 * 1024 |
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62 |
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63 def __init__(self, in_, out, channel): |
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64 self.in_ = in_ |
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65 self.out = out |
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66 self.channel = channel |
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67 |
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68 def read(self, size=-1): |
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69 if size < 0: |
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70 # if we need to consume all the clients input, ask for 4k chunks |
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71 # so the pipe doesn't fill up risking a deadlock |
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72 size = self.maxchunksize |
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73 s = self._read(size, self.channel) |
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74 buf = s |
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75 while s: |
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76 s = self._read(size, self.channel) |
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77 buf += s |
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78 |
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79 return buf |
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80 else: |
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81 return self._read(size, self.channel) |
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82 |
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83 def _read(self, size, channel): |
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84 if not size: |
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85 return '' |
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86 assert size > 0 |
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87 |
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88 # tell the client we need at most size bytes |
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89 self.out.write(struct.pack('>cI', channel, size)) |
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90 self.out.flush() |
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91 |
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92 length = self.in_.read(4) |
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93 length = struct.unpack('>I', length)[0] |
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94 if not length: |
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95 return '' |
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96 else: |
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97 return self.in_.read(length) |
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98 |
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99 def readline(self, size=-1): |
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100 if size < 0: |
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101 size = self.maxchunksize |
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102 s = self._read(size, 'L') |
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103 buf = s |
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104 # keep asking for more until there's either no more or |
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105 # we got a full line |
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106 while s and s[-1] != '\n': |
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107 s = self._read(size, 'L') |
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108 buf += s |
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109 |
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110 return buf |
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111 else: |
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112 return self._read(size, 'L') |
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113 |
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114 def __iter__(self): |
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115 return self |
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116 |
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117 def next(self): |
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118 l = self.readline() |
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119 if not l: |
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120 raise StopIteration |
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121 return l |
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122 |
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123 def __getattr__(self, attr): |
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124 if attr in ('isatty', 'fileno'): |
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125 raise AttributeError, attr |
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126 return getattr(self.in_, attr) |
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127 |
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128 class server(object): |
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129 """ |
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130 Listens for commands on stdin, runs them and writes the output on a channel |
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131 based stream to stdout. |
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132 """ |
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133 def __init__(self, ui, repo, mode): |
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134 self.cwd = os.getcwd() |
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135 |
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136 logpath = ui.config("cmdserver", "log", None) |
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137 if logpath: |
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138 global logfile |
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139 if logpath == '-': |
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140 # write log on a special 'd'ebug channel |
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141 logfile = channeledoutput(sys.stdout, sys.stdout, 'd') |
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142 else: |
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143 logfile = open(logpath, 'a') |
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144 |
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145 # the ui here is really the repo ui so take its baseui so we don't end up |
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146 # with its local configuration |
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147 self.ui = repo.baseui |
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148 self.repo = repo |
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149 self.repoui = repo.ui |
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150 |
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151 if mode == 'pipe': |
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152 self.cerr = channeledoutput(sys.stderr, sys.stdout, 'e') |
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153 self.cout = channeledoutput(sys.stdout, sys.stdout, 'o') |
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154 self.cin = channeledinput(sys.stdin, sys.stdout, 'I') |
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155 self.cresult = channeledoutput(sys.stdout, sys.stdout, 'r') |
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156 |
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157 self.client = sys.stdin |
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158 else: |
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159 raise util.Abort(_('unknown mode %s') % mode) |
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160 |
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161 def _read(self, size): |
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162 if not size: |
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163 return '' |
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164 |
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165 data = self.client.read(size) |
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166 |
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167 # is the other end closed? |
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168 if not data: |
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169 raise EOFError() |
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170 |
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171 return data |
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172 |
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173 def runcommand(self): |
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174 """ reads a list of \0 terminated arguments, executes |
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175 and writes the return code to the result channel """ |
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176 |
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177 length = struct.unpack('>I', self._read(4))[0] |
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178 if not length: |
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179 args = [] |
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180 else: |
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181 args = self._read(length).split('\0') |
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182 |
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183 # copy the uis so changes (e.g. --config or --verbose) don't |
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184 # persist between requests |
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185 copiedui = self.ui.copy() |
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186 self.repo.baseui = copiedui |
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187 self.repo.ui = self.repo.dirstate._ui = self.repoui.copy() |
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188 self.repo.invalidate() |
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189 |
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190 req = dispatch.request(args[:], copiedui, self.repo, self.cin, |
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191 self.cout, self.cerr) |
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192 |
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193 ret = dispatch.dispatch(req) or 0 # might return None |
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194 |
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195 # restore old cwd |
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196 if '--cwd' in args: |
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197 os.chdir(self.cwd) |
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198 |
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199 self.cresult.write(struct.pack('>i', int(ret))) |
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200 |
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201 def getencoding(self): |
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202 """ writes the current encoding to the result channel """ |
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203 self.cresult.write(encoding.encoding) |
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204 |
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205 def serveone(self): |
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206 cmd = self.client.readline()[:-1] |
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207 if cmd: |
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208 handler = self.capabilities.get(cmd) |
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209 if handler: |
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210 handler(self) |
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211 else: |
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212 # clients are expected to check what commands are supported by |
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213 # looking at the servers capabilities |
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214 raise util.Abort(_('unknown command %s') % cmd) |
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215 |
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216 return cmd != '' |
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217 |
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218 capabilities = {'runcommand' : runcommand, |
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219 'getencoding' : getencoding} |
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220 |
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221 def serve(self): |
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222 hellomsg = 'capabilities: ' + ' '.join(self.capabilities.keys()) |
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223 hellomsg += '\n' |
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224 hellomsg += 'encoding: ' + encoding.encoding |
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225 |
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226 # write the hello msg in -one- chunk |
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227 self.cout.write(hellomsg) |
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228 |
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229 try: |
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230 while self.serveone(): |
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231 pass |
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232 except EOFError: |
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233 # we'll get here if the client disconnected while we were reading |
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234 # its request |
2e9f379de0ac
serve: add --cmdserver option to communicate with hg over a pipe
Idan Kamara <idankk86@gmail.com>
parents:
diff
changeset
|
235 return 1 |
2e9f379de0ac
serve: add --cmdserver option to communicate with hg over a pipe
Idan Kamara <idankk86@gmail.com>
parents:
diff
changeset
|
236 |
2e9f379de0ac
serve: add --cmdserver option to communicate with hg over a pipe
Idan Kamara <idankk86@gmail.com>
parents:
diff
changeset
|
237 return 0 |