Mercurial > hg
annotate hgext/chgserver.py @ 28436:8d38eab2777a
peer: add an iterbatcher interface
This is very much like ordinary batch(), but it will let me add a mode
for batch where we have pathologically large requests which are then
handled streamily. This will be a significant improvement for things
like remotefilelog, which may want to request thousands of entities at
once.
author | Augie Fackler <augie@google.com> |
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date | Tue, 01 Mar 2016 18:39:25 -0500 |
parents | 8f9661d1637b |
children | 8062869860b8 |
rev | line source |
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1 # chgserver.py - command server extension for cHg |
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2 # |
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3 # Copyright 2011 Yuya Nishihara <yuya@tcha.org> |
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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 """command server extension for cHg (EXPERIMENTAL) |
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9 |
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10 'S' channel (read/write) |
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11 propagate ui.system() request to client |
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12 |
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13 'attachio' command |
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14 attach client's stdio passed by sendmsg() |
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15 |
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16 'chdir' command |
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17 change current directory |
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18 |
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19 'getpager' command |
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20 checks if pager is enabled and which pager should be executed |
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21 |
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22 'setenv' command |
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23 replace os.environ completely |
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24 |
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26 set umask | |
27 | |
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28 'validate' command |
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29 reload the config and check if the server is up to date |
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30 |
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31 'SIGHUP' signal |
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32 reload configuration files |
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34 Config | |
35 ------ | |
36 | |
37 :: | |
38 | |
39 [chgserver] | |
40 idletimeout = 3600 # seconds, after which an idle server will exit | |
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41 skiphash = False # whether to skip config or env change checks |
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42 """ |
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43 |
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44 from __future__ import absolute_import |
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45 |
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46 import SocketServer |
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47 import errno |
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48 import inspect |
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49 import os |
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50 import re |
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51 import signal |
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52 import struct |
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53 import sys |
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54 import threading |
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55 import time |
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56 import traceback |
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57 |
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58 from mercurial.i18n import _ |
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59 |
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60 from mercurial import ( |
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61 cmdutil, |
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62 commands, |
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63 commandserver, |
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64 dispatch, |
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65 error, |
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66 extensions, |
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67 osutil, |
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68 util, |
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69 ) |
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70 |
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71 # Note for extension authors: ONLY specify testedwith = 'internal' for |
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72 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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73 # be specifying the version(s) of Mercurial they are tested with, or |
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74 # leave the attribute unspecified. |
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75 testedwith = 'internal' |
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76 |
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77 _log = commandserver.log |
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78 |
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79 def _hashlist(items): |
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80 """return sha1 hexdigest for a list""" |
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81 return util.sha1(str(items)).hexdigest() |
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82 |
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83 # sensitive config sections affecting confighash |
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84 _configsections = ['extensions'] |
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85 |
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86 # sensitive environment variables affecting confighash |
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87 _envre = re.compile(r'''\A(?: |
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88 CHGHG |
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89 |HG.* |
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90 |LANG(?:UAGE)? |
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91 |LC_.* |
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92 |LD_.* |
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93 |PATH |
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94 |PYTHON.* |
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95 |TERM(?:INFO)? |
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96 |TZ |
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97 )\Z''', re.X) |
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98 |
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99 def _confighash(ui): |
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100 """return a quick hash for detecting config/env changes |
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101 |
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102 confighash is the hash of sensitive config items and environment variables. |
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103 |
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104 for chgserver, it is designed that once confighash changes, the server is |
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105 not qualified to serve its client and should redirect the client to a new |
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106 server. different from mtimehash, confighash change will not mark the |
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107 server outdated and exit since the user can have different configs at the |
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108 same time. |
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109 """ |
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110 sectionitems = [] |
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111 for section in _configsections: |
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112 sectionitems.append(ui.configitems(section)) |
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113 sectionhash = _hashlist(sectionitems) |
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114 envitems = [(k, v) for k, v in os.environ.iteritems() if _envre.match(k)] |
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115 envhash = _hashlist(sorted(envitems)) |
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116 return sectionhash[:6] + envhash[:6] |
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117 |
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118 def _getmtimepaths(ui): |
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119 """get a list of paths that should be checked to detect change |
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120 |
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121 The list will include: |
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122 - extensions (will not cover all files for complex extensions) |
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123 - mercurial/__version__.py |
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124 - python binary |
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125 """ |
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126 modules = [m for n, m in extensions.extensions(ui)] |
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127 try: |
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128 from mercurial import __version__ |
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129 modules.append(__version__) |
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130 except ImportError: |
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131 pass |
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132 files = [sys.executable] |
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133 for m in modules: |
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134 try: |
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135 files.append(inspect.getabsfile(m)) |
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136 except TypeError: |
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137 pass |
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138 return sorted(set(files)) |
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139 |
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140 def _mtimehash(paths): |
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141 """return a quick hash for detecting file changes |
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142 |
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143 mtimehash calls stat on given paths and calculate a hash based on size and |
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144 mtime of each file. mtimehash does not read file content because reading is |
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145 expensive. therefore it's not 100% reliable for detecting content changes. |
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146 it's possible to return different hashes for same file contents. |
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147 it's also possible to return a same hash for different file contents for |
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148 some carefully crafted situation. |
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149 |
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150 for chgserver, it is designed that once mtimehash changes, the server is |
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151 considered outdated immediately and should no longer provide service. |
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152 """ |
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153 def trystat(path): |
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154 try: |
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155 st = os.stat(path) |
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156 return (st.st_mtime, st.st_size) |
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157 except OSError: |
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158 # could be ENOENT, EPERM etc. not fatal in any case |
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159 pass |
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160 return _hashlist(map(trystat, paths))[:12] |
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161 |
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162 class hashstate(object): |
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163 """a structure storing confighash, mtimehash, paths used for mtimehash""" |
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164 def __init__(self, confighash, mtimehash, mtimepaths): |
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165 self.confighash = confighash |
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166 self.mtimehash = mtimehash |
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167 self.mtimepaths = mtimepaths |
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168 |
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169 @staticmethod |
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170 def fromui(ui, mtimepaths=None): |
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171 if mtimepaths is None: |
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172 mtimepaths = _getmtimepaths(ui) |
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173 confighash = _confighash(ui) |
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174 mtimehash = _mtimehash(mtimepaths) |
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175 _log('confighash = %s mtimehash = %s\n' % (confighash, mtimehash)) |
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176 return hashstate(confighash, mtimehash, mtimepaths) |
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177 |
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178 # copied from hgext/pager.py:uisetup() |
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179 def _setuppagercmd(ui, options, cmd): |
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180 if not ui.formatted(): |
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181 return |
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182 |
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183 p = ui.config("pager", "pager", os.environ.get("PAGER")) |
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184 usepager = False |
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185 always = util.parsebool(options['pager']) |
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186 auto = options['pager'] == 'auto' |
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187 |
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188 if not p: |
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189 pass |
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190 elif always: |
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191 usepager = True |
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192 elif not auto: |
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193 usepager = False |
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194 else: |
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195 attended = ['annotate', 'cat', 'diff', 'export', 'glog', 'log', 'qdiff'] |
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196 attend = ui.configlist('pager', 'attend', attended) |
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197 ignore = ui.configlist('pager', 'ignore') |
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198 cmds, _ = cmdutil.findcmd(cmd, commands.table) |
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199 |
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200 for cmd in cmds: |
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201 var = 'attend-%s' % cmd |
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202 if ui.config('pager', var): |
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203 usepager = ui.configbool('pager', var) |
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204 break |
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205 if (cmd in attend or |
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206 (cmd not in ignore and not attend)): |
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207 usepager = True |
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208 break |
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209 |
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210 if usepager: |
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211 ui.setconfig('ui', 'formatted', ui.formatted(), 'pager') |
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212 ui.setconfig('ui', 'interactive', False, 'pager') |
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213 return p |
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214 |
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215 _envvarre = re.compile(r'\$[a-zA-Z_]+') |
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216 |
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217 def _clearenvaliases(cmdtable): |
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218 """Remove stale command aliases referencing env vars; variable expansion |
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219 is done at dispatch.addaliases()""" |
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220 for name, tab in cmdtable.items(): |
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221 cmddef = tab[0] |
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222 if (isinstance(cmddef, dispatch.cmdalias) and |
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223 not cmddef.definition.startswith('!') and # shell alias |
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224 _envvarre.search(cmddef.definition)): |
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225 del cmdtable[name] |
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226 |
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227 def _newchgui(srcui, csystem): |
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228 class chgui(srcui.__class__): |
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229 def __init__(self, src=None): |
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230 super(chgui, self).__init__(src) |
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231 if src: |
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232 self._csystem = getattr(src, '_csystem', csystem) |
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233 else: |
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234 self._csystem = csystem |
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235 |
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236 def system(self, cmd, environ=None, cwd=None, onerr=None, |
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237 errprefix=None): |
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238 # copied from mercurial/util.py:system() |
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239 self.flush() |
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240 def py2shell(val): |
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241 if val is None or val is False: |
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242 return '0' |
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243 if val is True: |
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244 return '1' |
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245 return str(val) |
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246 env = os.environ.copy() |
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247 if environ: |
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248 env.update((k, py2shell(v)) for k, v in environ.iteritems()) |
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249 env['HG'] = util.hgexecutable() |
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250 rc = self._csystem(cmd, env, cwd) |
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251 if rc and onerr: |
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252 errmsg = '%s %s' % (os.path.basename(cmd.split(None, 1)[0]), |
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253 util.explainexit(rc)[0]) |
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254 if errprefix: |
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255 errmsg = '%s: %s' % (errprefix, errmsg) |
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256 raise onerr(errmsg) |
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257 return rc |
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258 |
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259 return chgui(srcui) |
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260 |
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261 def _renewui(srcui, args=None): |
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262 if not args: |
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263 args = [] |
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264 |
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265 newui = srcui.__class__() |
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266 for a in ['fin', 'fout', 'ferr', 'environ']: |
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267 setattr(newui, a, getattr(srcui, a)) |
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268 if util.safehasattr(srcui, '_csystem'): |
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269 newui._csystem = srcui._csystem |
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270 |
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271 # load wd and repo config, copied from dispatch.py |
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272 cwds = dispatch._earlygetopt(['--cwd'], args) |
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273 cwd = cwds and os.path.realpath(cwds[-1]) or None |
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274 rpath = dispatch._earlygetopt(["-R", "--repository", "--repo"], args) |
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275 path, newui = dispatch._getlocal(newui, rpath, wd=cwd) |
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276 |
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277 # internal config: extensions.chgserver |
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278 # copy it. it can only be overrided from command line. |
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279 newui.setconfig('extensions', 'chgserver', |
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280 srcui.config('extensions', 'chgserver'), '--config') |
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281 |
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282 # command line args |
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283 dispatch._parseconfig(newui, dispatch._earlygetopt(['--config'], args)) |
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284 |
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285 # stolen from tortoisehg.util.copydynamicconfig() |
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286 for section, name, value in srcui.walkconfig(): |
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287 source = srcui.configsource(section, name) |
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288 if ':' in source or source == '--config': |
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289 # path:line or command line |
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290 continue |
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291 if source == 'none': |
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292 # ui.configsource returns 'none' by default |
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293 source = '' |
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294 newui.setconfig(section, name, value, source) |
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295 return newui |
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296 |
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297 class channeledsystem(object): |
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298 """Propagate ui.system() request in the following format: |
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299 |
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300 payload length (unsigned int), |
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301 cmd, '\0', |
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302 cwd, '\0', |
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303 envkey, '=', val, '\0', |
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304 ... |
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305 envkey, '=', val |
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306 |
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307 and waits: |
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308 |
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309 exitcode length (unsigned int), |
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310 exitcode (int) |
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311 """ |
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312 def __init__(self, in_, out, channel): |
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313 self.in_ = in_ |
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314 self.out = out |
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315 self.channel = channel |
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316 |
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317 def __call__(self, cmd, environ, cwd): |
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318 args = [util.quotecommand(cmd), cwd or '.'] |
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319 args.extend('%s=%s' % (k, v) for k, v in environ.iteritems()) |
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320 data = '\0'.join(args) |
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321 self.out.write(struct.pack('>cI', self.channel, len(data))) |
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322 self.out.write(data) |
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323 self.out.flush() |
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324 |
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325 length = self.in_.read(4) |
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326 length, = struct.unpack('>I', length) |
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327 if length != 4: |
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328 raise error.Abort(_('invalid response')) |
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329 rc, = struct.unpack('>i', self.in_.read(4)) |
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330 return rc |
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331 |
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332 _iochannels = [ |
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333 # server.ch, ui.fp, mode |
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334 ('cin', 'fin', 'rb'), |
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335 ('cout', 'fout', 'wb'), |
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336 ('cerr', 'ferr', 'wb'), |
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337 ] |
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338 |
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339 class chgcmdserver(commandserver.server): |
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340 def __init__(self, ui, repo, fin, fout, sock, hashstate, baseaddress): |
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341 super(chgcmdserver, self).__init__( |
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342 _newchgui(ui, channeledsystem(fin, fout, 'S')), repo, fin, fout) |
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343 self.clientsock = sock |
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344 self._oldios = [] # original (self.ch, ui.fp, fd) before "attachio" |
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345 self.hashstate = hashstate |
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346 self.baseaddress = baseaddress |
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347 if hashstate is not None: |
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348 self.capabilities = self.capabilities.copy() |
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349 self.capabilities['validate'] = chgcmdserver.validate |
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350 |
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351 def cleanup(self): |
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352 # dispatch._runcatch() does not flush outputs if exception is not |
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353 # handled by dispatch._dispatch() |
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354 self.ui.flush() |
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355 self._restoreio() |
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356 |
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357 def attachio(self): |
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358 """Attach to client's stdio passed via unix domain socket; all |
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359 channels except cresult will no longer be used |
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360 """ |
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361 # tell client to sendmsg() with 1-byte payload, which makes it |
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362 # distinctive from "attachio\n" command consumed by client.read() |
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363 self.clientsock.sendall(struct.pack('>cI', 'I', 1)) |
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364 clientfds = osutil.recvfds(self.clientsock.fileno()) |
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365 _log('received fds: %r\n' % clientfds) |
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366 |
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367 ui = self.ui |
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368 ui.flush() |
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369 first = self._saveio() |
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370 for fd, (cn, fn, mode) in zip(clientfds, _iochannels): |
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371 assert fd > 0 |
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372 fp = getattr(ui, fn) |
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373 os.dup2(fd, fp.fileno()) |
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374 os.close(fd) |
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375 if not first: |
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376 continue |
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377 # reset buffering mode when client is first attached. as we want |
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378 # to see output immediately on pager, the mode stays unchanged |
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379 # when client re-attached. ferr is unchanged because it should |
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380 # be unbuffered no matter if it is a tty or not. |
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381 if fn == 'ferr': |
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382 newfp = fp |
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383 else: |
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384 # make it line buffered explicitly because the default is |
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385 # decided on first write(), where fout could be a pager. |
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386 if fp.isatty(): |
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387 bufsize = 1 # line buffered |
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388 else: |
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389 bufsize = -1 # system default |
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390 newfp = os.fdopen(fp.fileno(), mode, bufsize) |
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391 setattr(ui, fn, newfp) |
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392 setattr(self, cn, newfp) |
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393 |
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394 self.cresult.write(struct.pack('>i', len(clientfds))) |
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395 |
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396 def _saveio(self): |
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397 if self._oldios: |
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398 return False |
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399 ui = self.ui |
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400 for cn, fn, _mode in _iochannels: |
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401 ch = getattr(self, cn) |
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402 fp = getattr(ui, fn) |
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403 fd = os.dup(fp.fileno()) |
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404 self._oldios.append((ch, fp, fd)) |
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405 return True |
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406 |
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407 def _restoreio(self): |
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408 ui = self.ui |
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409 for (ch, fp, fd), (cn, fn, _mode) in zip(self._oldios, _iochannels): |
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410 newfp = getattr(ui, fn) |
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411 # close newfp while it's associated with client; otherwise it |
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412 # would be closed when newfp is deleted |
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413 if newfp is not fp: |
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414 newfp.close() |
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415 # restore original fd: fp is open again |
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416 os.dup2(fd, fp.fileno()) |
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417 os.close(fd) |
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418 setattr(self, cn, ch) |
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419 setattr(ui, fn, fp) |
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420 del self._oldios[:] |
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421 |
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422 def validate(self): |
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423 """Reload the config and check if the server is up to date |
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424 |
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425 Read a list of '\0' separated arguments. |
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426 Write a non-empty list of '\0' separated instruction strings or '\0' |
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427 if the list is empty. |
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428 An instruction string could be either: |
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429 - "unlink $path", the client should unlink the path to stop the |
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430 outdated server. |
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431 - "redirect $path", the client should try to connect to another |
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432 server instead. |
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433 """ |
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434 args = self._readlist() |
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435 self.ui = _renewui(self.ui, args) |
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436 newhash = hashstate.fromui(self.ui, self.hashstate.mtimepaths) |
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437 insts = [] |
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438 if newhash.mtimehash != self.hashstate.mtimehash: |
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439 addr = _hashaddress(self.baseaddress, self.hashstate.confighash) |
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440 insts.append('unlink %s' % addr) |
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441 if newhash.confighash != self.hashstate.confighash: |
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442 addr = _hashaddress(self.baseaddress, newhash.confighash) |
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443 insts.append('redirect %s' % addr) |
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444 _log('validate: %s\n' % insts) |
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445 self.cresult.write('\0'.join(insts) or '\0') |
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446 |
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447 def chdir(self): |
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448 """Change current directory |
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449 |
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450 Note that the behavior of --cwd option is bit different from this. |
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451 It does not affect --config parameter. |
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452 """ |
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453 path = self._readstr() |
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454 if not path: |
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455 return |
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456 _log('chdir to %r\n' % path) |
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457 os.chdir(path) |
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458 |
28159 | 459 def setumask(self): |
460 """Change umask""" | |
461 mask = struct.unpack('>I', self._read(4))[0] | |
462 _log('setumask %r\n' % mask) | |
463 os.umask(mask) | |
464 | |
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465 def getpager(self): |
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466 """Read cmdargs and write pager command to r-channel if enabled |
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467 |
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468 If pager isn't enabled, this writes '\0' because channeledoutput |
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469 does not allow to write empty data. |
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470 """ |
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471 args = self._readlist() |
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472 try: |
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473 cmd, _func, args, options, _cmdoptions = dispatch._parse(self.ui, |
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474 args) |
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475 except (error.Abort, error.AmbiguousCommand, error.CommandError, |
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476 error.UnknownCommand): |
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477 cmd = None |
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478 options = {} |
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479 if not cmd or 'pager' not in options: |
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480 self.cresult.write('\0') |
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481 return |
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482 |
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483 pagercmd = _setuppagercmd(self.ui, options, cmd) |
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484 if pagercmd: |
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485 self.cresult.write(pagercmd) |
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486 else: |
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487 self.cresult.write('\0') |
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488 |
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489 def setenv(self): |
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490 """Clear and update os.environ |
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491 |
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492 Note that not all variables can make an effect on the running process. |
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493 """ |
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494 l = self._readlist() |
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495 try: |
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496 newenv = dict(s.split('=', 1) for s in l) |
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497 except ValueError: |
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498 raise ValueError('unexpected value in setenv request') |
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499 |
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500 diffkeys = set(k for k in set(os.environ.keys() + newenv.keys()) |
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501 if os.environ.get(k) != newenv.get(k)) |
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502 _log('change env: %r\n' % sorted(diffkeys)) |
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503 |
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504 os.environ.clear() |
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505 os.environ.update(newenv) |
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506 |
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507 if set(['HGPLAIN', 'HGPLAINEXCEPT']) & diffkeys: |
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508 # reload config so that ui.plain() takes effect |
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509 self.ui = _renewui(self.ui) |
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510 |
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511 _clearenvaliases(commands.table) |
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512 |
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513 capabilities = commandserver.server.capabilities.copy() |
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514 capabilities.update({'attachio': attachio, |
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515 'chdir': chdir, |
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516 'getpager': getpager, |
28159 | 517 'setenv': setenv, |
518 'setumask': setumask}) | |
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519 |
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520 # copied from mercurial/commandserver.py |
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521 class _requesthandler(SocketServer.StreamRequestHandler): |
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522 def handle(self): |
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523 # use a different process group from the master process, making this |
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524 # process pass kernel "is_current_pgrp_orphaned" check so signals like |
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525 # SIGTSTP, SIGTTIN, SIGTTOU are not ignored. |
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526 os.setpgid(0, 0) |
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527 ui = self.server.ui |
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528 repo = self.server.repo |
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529 sv = chgcmdserver(ui, repo, self.rfile, self.wfile, self.connection, |
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530 self.server.hashstate, self.server.baseaddress) |
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531 try: |
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532 try: |
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533 sv.serve() |
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534 # handle exceptions that may be raised by command server. most of |
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535 # known exceptions are caught by dispatch. |
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536 except error.Abort as inst: |
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537 ui.warn(_('abort: %s\n') % inst) |
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538 except IOError as inst: |
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539 if inst.errno != errno.EPIPE: |
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540 raise |
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541 except KeyboardInterrupt: |
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542 pass |
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543 finally: |
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544 sv.cleanup() |
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545 except: # re-raises |
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546 # also write traceback to error channel. otherwise client cannot |
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547 # see it because it is written to server's stderr by default. |
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548 traceback.print_exc(file=sv.cerr) |
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549 raise |
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550 |
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551 def _tempaddress(address): |
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552 return '%s.%d.tmp' % (address, os.getpid()) |
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553 |
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554 def _hashaddress(address, hashstr): |
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555 return '%s-%s' % (address, hashstr) |
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556 |
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557 class AutoExitMixIn: # use old-style to comply with SocketServer design |
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558 lastactive = time.time() |
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559 idletimeout = 3600 # default 1 hour |
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560 |
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561 def startautoexitthread(self): |
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562 # note: the auto-exit check here is cheap enough to not use a thread, |
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563 # be done in serve_forever. however SocketServer is hook-unfriendly, |
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564 # you simply cannot hook serve_forever without copying a lot of code. |
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565 # besides, serve_forever's docstring suggests using thread. |
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566 thread = threading.Thread(target=self._autoexitloop) |
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567 thread.daemon = True |
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568 thread.start() |
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569 |
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570 def _autoexitloop(self, interval=1): |
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571 while True: |
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572 time.sleep(interval) |
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573 if not self.issocketowner(): |
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574 _log('%s is not owned, exiting.\n' % self.server_address) |
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575 break |
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576 if time.time() - self.lastactive > self.idletimeout: |
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577 _log('being idle too long. exiting.\n') |
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578 break |
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579 self.shutdown() |
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580 |
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581 def process_request(self, request, address): |
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582 self.lastactive = time.time() |
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583 return SocketServer.ForkingMixIn.process_request( |
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584 self, request, address) |
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585 |
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586 def server_bind(self): |
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587 # use a unique temp address so we can stat the file and do ownership |
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588 # check later |
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589 tempaddress = _tempaddress(self.server_address) |
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590 self.socket.bind(tempaddress) |
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591 self._socketstat = os.stat(tempaddress) |
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592 # rename will replace the old socket file if exists atomically. the |
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593 # old server will detect ownership change and exit. |
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|
594 util.rename(tempaddress, self.server_address) |
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|
595 |
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|
596 def issocketowner(self): |
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|
597 try: |
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|
598 stat = os.stat(self.server_address) |
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599 return (stat.st_ino == self._socketstat.st_ino and |
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600 stat.st_mtime == self._socketstat.st_mtime) |
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|
601 except OSError: |
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|
602 return False |
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|
603 |
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|
604 def unlinksocketfile(self): |
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|
605 if not self.issocketowner(): |
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|
606 return |
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|
607 # it is possible to have a race condition here that we may |
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608 # remove another server's socket file. but that's okay |
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609 # since that server will detect and exit automatically and |
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610 # the client will start a new server on demand. |
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|
611 try: |
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|
612 os.unlink(self.server_address) |
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|
613 except OSError as exc: |
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|
614 if exc.errno != errno.ENOENT: |
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|
615 raise |
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|
616 |
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|
617 class chgunixservice(commandserver.unixservice): |
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|
618 def init(self): |
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|
619 signal.signal(signal.SIGHUP, self._reloadconfig) |
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620 self._inithashstate() |
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|
621 class cls(AutoExitMixIn, SocketServer.ForkingMixIn, |
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|
622 SocketServer.UnixStreamServer): |
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|
623 ui = self.ui |
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|
624 repo = self.repo |
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|
625 hashstate = self.hashstate |
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|
626 baseaddress = self.baseaddress |
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627 self.server = cls(self.address, _requesthandler) |
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|
628 self.server.idletimeout = self.ui.configint( |
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|
629 'chgserver', 'idletimeout', self.server.idletimeout) |
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|
630 self.server.startautoexitthread() |
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|
631 self._createsymlink() |
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|
632 # avoid writing "listening at" message to stdout before attachio |
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|
633 # request, which calls setvbuf() |
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|
634 |
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|
635 def _inithashstate(self): |
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|
636 self.baseaddress = self.address |
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|
637 if self.ui.configbool('chgserver', 'skiphash', False): |
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|
638 self.hashstate = None |
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|
639 return |
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|
640 self.hashstate = hashstate.fromui(self.ui) |
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|
641 self.address = _hashaddress(self.address, self.hashstate.confighash) |
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|
642 |
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|
643 def _createsymlink(self): |
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644 if self.baseaddress == self.address: |
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645 return |
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646 tempaddress = _tempaddress(self.baseaddress) |
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647 os.symlink(os.path.basename(self.address), tempaddress) |
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648 util.rename(tempaddress, self.baseaddress) |
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649 |
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650 def _reloadconfig(self, signum, frame): |
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651 self.ui = self.server.ui = _renewui(self.ui) |
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652 |
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653 def run(self): |
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654 try: |
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655 self.server.serve_forever() |
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656 finally: |
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657 self.server.unlinksocketfile() |
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658 |
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659 def uisetup(ui): |
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660 commandserver._servicemap['chgunix'] = chgunixservice |
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662 # CHGINTERNALMARK is temporarily set by chg client to detect if chg will | |
663 # start another chg. drop it to avoid possible side effects. | |
664 if 'CHGINTERNALMARK' in os.environ: | |
665 del os.environ['CHGINTERNALMARK'] |