Mercurial > hg
annotate hgext/chgserver.py @ 29039:e3055b46ed1b stable
tags: silence hgtagsfnodes reading failures
tryread() doesn't handle "is a directory" errors and presumably
others. We might not want to globally swallow such tryread errors, so
we replace with our own try/except handling.
An upcoming test will use directories as a portable stand-in for
various bizarre circumstances that cache read/write code should be
robust to.
author | Matt Mackall <mpm@selenic.com> |
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date | Thu, 28 Apr 2016 15:40:43 -0500 |
parents | 97c8da2f89f9 |
children | 983353035cec |
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 |
28325 | 25 'setumask' command |
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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32 ------ | |
33 | |
34 :: | |
35 | |
36 [chgserver] | |
37 idletimeout = 3600 # seconds, after which an idle server will exit | |
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38 skiphash = False # whether to skip config or env change checks |
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39 """ |
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40 |
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41 from __future__ import absolute_import |
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42 |
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43 import SocketServer |
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44 import errno |
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45 import gc |
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46 import inspect |
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47 import os |
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48 import random |
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49 import re |
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50 import struct |
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51 import sys |
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52 import threading |
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53 import time |
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54 import traceback |
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55 |
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56 from mercurial.i18n import _ |
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57 |
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58 from mercurial import ( |
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59 cmdutil, |
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60 commands, |
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61 commandserver, |
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62 dispatch, |
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63 error, |
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64 extensions, |
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65 osutil, |
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66 util, |
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67 ) |
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68 |
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69 # Note for extension authors: ONLY specify testedwith = 'internal' for |
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70 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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71 # be specifying the version(s) of Mercurial they are tested with, or |
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72 # leave the attribute unspecified. |
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73 testedwith = 'internal' |
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74 |
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75 _log = commandserver.log |
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76 |
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77 def _hashlist(items): |
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78 """return sha1 hexdigest for a list""" |
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79 return util.sha1(str(items)).hexdigest() |
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80 |
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81 # sensitive config sections affecting confighash |
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82 _configsections = [ |
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83 'extdiff', # uisetup will register new commands |
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84 'extensions', |
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85 ] |
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86 |
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87 # sensitive environment variables affecting confighash |
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88 _envre = re.compile(r'''\A(?: |
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89 CHGHG |
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90 |HG.* |
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91 |LANG(?:UAGE)? |
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92 |LC_.* |
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93 |LD_.* |
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94 |PATH |
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95 |PYTHON.* |
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96 |TERM(?:INFO)? |
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97 |TZ |
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98 )\Z''', re.X) |
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99 |
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100 def _confighash(ui): |
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101 """return a quick hash for detecting config/env changes |
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102 |
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103 confighash is the hash of sensitive config items and environment variables. |
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104 |
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105 for chgserver, it is designed that once confighash changes, the server is |
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106 not qualified to serve its client and should redirect the client to a new |
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107 server. different from mtimehash, confighash change will not mark the |
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108 server outdated and exit since the user can have different configs at the |
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109 same time. |
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110 """ |
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111 sectionitems = [] |
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112 for section in _configsections: |
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113 sectionitems.append(ui.configitems(section)) |
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114 sectionhash = _hashlist(sectionitems) |
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115 envitems = [(k, v) for k, v in os.environ.iteritems() if _envre.match(k)] |
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116 envhash = _hashlist(sorted(envitems)) |
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117 return sectionhash[:6] + envhash[:6] |
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118 |
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119 def _getmtimepaths(ui): |
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120 """get a list of paths that should be checked to detect change |
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121 |
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122 The list will include: |
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123 - extensions (will not cover all files for complex extensions) |
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124 - mercurial/__version__.py |
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125 - python binary |
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126 """ |
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127 modules = [m for n, m in extensions.extensions(ui)] |
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128 try: |
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129 from mercurial import __version__ |
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130 modules.append(__version__) |
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131 except ImportError: |
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132 pass |
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133 files = [sys.executable] |
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134 for m in modules: |
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135 try: |
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136 files.append(inspect.getabsfile(m)) |
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137 except TypeError: |
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138 pass |
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139 return sorted(set(files)) |
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140 |
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141 def _mtimehash(paths): |
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142 """return a quick hash for detecting file changes |
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143 |
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144 mtimehash calls stat on given paths and calculate a hash based on size and |
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145 mtime of each file. mtimehash does not read file content because reading is |
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146 expensive. therefore it's not 100% reliable for detecting content changes. |
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147 it's possible to return different hashes for same file contents. |
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148 it's also possible to return a same hash for different file contents for |
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149 some carefully crafted situation. |
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150 |
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151 for chgserver, it is designed that once mtimehash changes, the server is |
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152 considered outdated immediately and should no longer provide service. |
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153 """ |
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154 def trystat(path): |
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155 try: |
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156 st = os.stat(path) |
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157 return (st.st_mtime, st.st_size) |
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158 except OSError: |
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159 # could be ENOENT, EPERM etc. not fatal in any case |
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160 pass |
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161 return _hashlist(map(trystat, paths))[:12] |
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162 |
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163 class hashstate(object): |
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164 """a structure storing confighash, mtimehash, paths used for mtimehash""" |
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165 def __init__(self, confighash, mtimehash, mtimepaths): |
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166 self.confighash = confighash |
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167 self.mtimehash = mtimehash |
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168 self.mtimepaths = mtimepaths |
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169 |
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170 @staticmethod |
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171 def fromui(ui, mtimepaths=None): |
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172 if mtimepaths is None: |
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173 mtimepaths = _getmtimepaths(ui) |
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174 confighash = _confighash(ui) |
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175 mtimehash = _mtimehash(mtimepaths) |
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176 _log('confighash = %s mtimehash = %s\n' % (confighash, mtimehash)) |
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177 return hashstate(confighash, mtimehash, mtimepaths) |
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178 |
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179 # copied from hgext/pager.py:uisetup() |
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180 def _setuppagercmd(ui, options, cmd): |
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181 if not ui.formatted(): |
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182 return |
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183 |
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184 p = ui.config("pager", "pager", os.environ.get("PAGER")) |
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185 usepager = False |
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186 always = util.parsebool(options['pager']) |
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187 auto = options['pager'] == 'auto' |
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188 |
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189 if not p: |
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190 pass |
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191 elif always: |
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192 usepager = True |
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193 elif not auto: |
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194 usepager = False |
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195 else: |
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196 attended = ['annotate', 'cat', 'diff', 'export', 'glog', 'log', 'qdiff'] |
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197 attend = ui.configlist('pager', 'attend', attended) |
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198 ignore = ui.configlist('pager', 'ignore') |
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199 cmds, _ = cmdutil.findcmd(cmd, commands.table) |
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200 |
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201 for cmd in cmds: |
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202 var = 'attend-%s' % cmd |
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203 if ui.config('pager', var): |
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204 usepager = ui.configbool('pager', var) |
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205 break |
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206 if (cmd in attend or |
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207 (cmd not in ignore and not attend)): |
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208 usepager = True |
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209 break |
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210 |
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211 if usepager: |
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212 ui.setconfig('ui', 'formatted', ui.formatted(), 'pager') |
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213 ui.setconfig('ui', 'interactive', False, 'pager') |
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214 return p |
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215 |
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216 _envvarre = re.compile(r'\$[a-zA-Z_]+') |
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217 |
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218 def _clearenvaliases(cmdtable): |
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219 """Remove stale command aliases referencing env vars; variable expansion |
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220 is done at dispatch.addaliases()""" |
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221 for name, tab in cmdtable.items(): |
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222 cmddef = tab[0] |
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223 if (isinstance(cmddef, dispatch.cmdalias) and |
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224 not cmddef.definition.startswith('!') and # shell alias |
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225 _envvarre.search(cmddef.definition)): |
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226 del cmdtable[name] |
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227 |
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228 def _newchgui(srcui, csystem): |
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229 class chgui(srcui.__class__): |
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230 def __init__(self, src=None): |
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231 super(chgui, self).__init__(src) |
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232 if src: |
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233 self._csystem = getattr(src, '_csystem', csystem) |
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234 else: |
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235 self._csystem = csystem |
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236 |
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237 def system(self, cmd, environ=None, cwd=None, onerr=None, |
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238 errprefix=None): |
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239 # fallback to the original system method if the output needs to be |
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240 # captured (to self._buffers), or the output stream is not stdout |
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241 # (e.g. stderr, cStringIO), because the chg client is not aware of |
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242 # these situations and will behave differently (write to stdout). |
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243 if (any(s[1] for s in self._bufferstates) |
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244 or not util.safehasattr(self.fout, 'fileno') |
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245 or self.fout.fileno() != sys.stdout.fileno()): |
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246 return super(chgui, self).system(cmd, environ, cwd, onerr, |
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247 errprefix) |
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248 # copied from mercurial/util.py:system() |
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249 self.flush() |
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250 def py2shell(val): |
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251 if val is None or val is False: |
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252 return '0' |
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253 if val is True: |
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254 return '1' |
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255 return str(val) |
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256 env = os.environ.copy() |
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257 if environ: |
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258 env.update((k, py2shell(v)) for k, v in environ.iteritems()) |
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259 env['HG'] = util.hgexecutable() |
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260 rc = self._csystem(cmd, env, cwd) |
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261 if rc and onerr: |
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262 errmsg = '%s %s' % (os.path.basename(cmd.split(None, 1)[0]), |
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263 util.explainexit(rc)[0]) |
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264 if errprefix: |
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265 errmsg = '%s: %s' % (errprefix, errmsg) |
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266 raise onerr(errmsg) |
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267 return rc |
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268 |
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269 return chgui(srcui) |
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270 |
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271 def _loadnewui(srcui, args): |
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272 newui = srcui.__class__() |
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273 for a in ['fin', 'fout', 'ferr', 'environ']: |
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274 setattr(newui, a, getattr(srcui, a)) |
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275 if util.safehasattr(srcui, '_csystem'): |
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276 newui._csystem = srcui._csystem |
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277 |
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278 # internal config: extensions.chgserver |
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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 args = args[:] |
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284 dispatch._parseconfig(newui, dispatch._earlygetopt(['--config'], args)) |
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285 |
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286 # stolen from tortoisehg.util.copydynamicconfig() |
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287 for section, name, value in srcui.walkconfig(): |
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288 source = srcui.configsource(section, name) |
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289 if ':' in source or source == '--config': |
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290 # path:line or command line |
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291 continue |
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292 if source == 'none': |
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293 # ui.configsource returns 'none' by default |
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294 source = '' |
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295 newui.setconfig(section, name, value, source) |
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296 |
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297 # load wd and repo config, copied from dispatch.py |
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298 cwds = dispatch._earlygetopt(['--cwd'], args) |
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299 cwd = cwds and os.path.realpath(cwds[-1]) or None |
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300 rpath = dispatch._earlygetopt(["-R", "--repository", "--repo"], args) |
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301 path, newlui = dispatch._getlocal(newui, rpath, wd=cwd) |
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302 |
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303 return (newui, newlui) |
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304 |
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305 class channeledsystem(object): |
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306 """Propagate ui.system() request in the following format: |
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307 |
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308 payload length (unsigned int), |
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309 cmd, '\0', |
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310 cwd, '\0', |
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311 envkey, '=', val, '\0', |
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312 ... |
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313 envkey, '=', val |
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314 |
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315 and waits: |
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316 |
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317 exitcode length (unsigned int), |
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318 exitcode (int) |
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319 """ |
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320 def __init__(self, in_, out, channel): |
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321 self.in_ = in_ |
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322 self.out = out |
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323 self.channel = channel |
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324 |
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325 def __call__(self, cmd, environ, cwd): |
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326 args = [util.quotecommand(cmd), os.path.abspath(cwd or '.')] |
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327 args.extend('%s=%s' % (k, v) for k, v in environ.iteritems()) |
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328 data = '\0'.join(args) |
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329 self.out.write(struct.pack('>cI', self.channel, len(data))) |
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330 self.out.write(data) |
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331 self.out.flush() |
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332 |
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333 length = self.in_.read(4) |
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334 length, = struct.unpack('>I', length) |
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335 if length != 4: |
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336 raise error.Abort(_('invalid response')) |
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337 rc, = struct.unpack('>i', self.in_.read(4)) |
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338 return rc |
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339 |
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340 _iochannels = [ |
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341 # server.ch, ui.fp, mode |
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342 ('cin', 'fin', 'rb'), |
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343 ('cout', 'fout', 'wb'), |
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344 ('cerr', 'ferr', 'wb'), |
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345 ] |
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346 |
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347 class chgcmdserver(commandserver.server): |
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348 def __init__(self, ui, repo, fin, fout, sock, hashstate, baseaddress): |
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349 super(chgcmdserver, self).__init__( |
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350 _newchgui(ui, channeledsystem(fin, fout, 'S')), repo, fin, fout) |
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351 self.clientsock = sock |
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352 self._oldios = [] # original (self.ch, ui.fp, fd) before "attachio" |
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353 self.hashstate = hashstate |
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354 self.baseaddress = baseaddress |
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355 if hashstate is not None: |
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356 self.capabilities = self.capabilities.copy() |
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357 self.capabilities['validate'] = chgcmdserver.validate |
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358 |
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359 def cleanup(self): |
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360 # dispatch._runcatch() does not flush outputs if exception is not |
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361 # handled by dispatch._dispatch() |
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362 self.ui.flush() |
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363 self._restoreio() |
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364 |
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365 def attachio(self): |
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366 """Attach to client's stdio passed via unix domain socket; all |
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367 channels except cresult will no longer be used |
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368 """ |
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369 # tell client to sendmsg() with 1-byte payload, which makes it |
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370 # distinctive from "attachio\n" command consumed by client.read() |
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371 self.clientsock.sendall(struct.pack('>cI', 'I', 1)) |
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372 clientfds = osutil.recvfds(self.clientsock.fileno()) |
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373 _log('received fds: %r\n' % clientfds) |
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374 |
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375 ui = self.ui |
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376 ui.flush() |
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377 first = self._saveio() |
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378 for fd, (cn, fn, mode) in zip(clientfds, _iochannels): |
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379 assert fd > 0 |
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380 fp = getattr(ui, fn) |
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381 os.dup2(fd, fp.fileno()) |
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382 os.close(fd) |
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383 if not first: |
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384 continue |
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385 # reset buffering mode when client is first attached. as we want |
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386 # to see output immediately on pager, the mode stays unchanged |
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387 # when client re-attached. ferr is unchanged because it should |
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388 # be unbuffered no matter if it is a tty or not. |
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389 if fn == 'ferr': |
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390 newfp = fp |
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391 else: |
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392 # make it line buffered explicitly because the default is |
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393 # decided on first write(), where fout could be a pager. |
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394 if fp.isatty(): |
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395 bufsize = 1 # line buffered |
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396 else: |
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397 bufsize = -1 # system default |
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398 newfp = os.fdopen(fp.fileno(), mode, bufsize) |
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399 setattr(ui, fn, newfp) |
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400 setattr(self, cn, newfp) |
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401 |
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402 self.cresult.write(struct.pack('>i', len(clientfds))) |
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403 |
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404 def _saveio(self): |
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405 if self._oldios: |
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406 return False |
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407 ui = self.ui |
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408 for cn, fn, _mode in _iochannels: |
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409 ch = getattr(self, cn) |
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410 fp = getattr(ui, fn) |
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411 fd = os.dup(fp.fileno()) |
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412 self._oldios.append((ch, fp, fd)) |
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413 return True |
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414 |
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415 def _restoreio(self): |
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416 ui = self.ui |
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417 for (ch, fp, fd), (cn, fn, _mode) in zip(self._oldios, _iochannels): |
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418 newfp = getattr(ui, fn) |
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419 # close newfp while it's associated with client; otherwise it |
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420 # would be closed when newfp is deleted |
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421 if newfp is not fp: |
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422 newfp.close() |
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423 # restore original fd: fp is open again |
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424 os.dup2(fd, fp.fileno()) |
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425 os.close(fd) |
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426 setattr(self, cn, ch) |
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427 setattr(ui, fn, fp) |
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428 del self._oldios[:] |
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429 |
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430 def validate(self): |
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431 """Reload the config and check if the server is up to date |
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432 |
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433 Read a list of '\0' separated arguments. |
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434 Write a non-empty list of '\0' separated instruction strings or '\0' |
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435 if the list is empty. |
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436 An instruction string could be either: |
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437 - "unlink $path", the client should unlink the path to stop the |
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438 outdated server. |
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439 - "redirect $path", the client should attempt to connect to $path |
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440 first. If it does not work, start a new server. It implies |
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441 "reconnect". |
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442 - "exit $n", the client should exit directly with code n. |
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443 This may happen if we cannot parse the config. |
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444 - "reconnect", the client should close the connection and |
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445 reconnect. |
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446 If neither "reconnect" nor "redirect" is included in the instruction |
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447 list, the client can continue with this server after completing all |
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448 the instructions. |
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449 """ |
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450 args = self._readlist() |
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451 try: |
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452 self.ui, lui = _loadnewui(self.ui, args) |
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453 except error.ParseError as inst: |
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454 dispatch._formatparse(self.ui.warn, inst) |
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455 self.ui.flush() |
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456 self.cresult.write('exit 255') |
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457 return |
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458 newhash = hashstate.fromui(lui, self.hashstate.mtimepaths) |
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459 insts = [] |
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460 if newhash.mtimehash != self.hashstate.mtimehash: |
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461 addr = _hashaddress(self.baseaddress, self.hashstate.confighash) |
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462 insts.append('unlink %s' % addr) |
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463 # mtimehash is empty if one or more extensions fail to load. |
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464 # to be compatible with hg, still serve the client this time. |
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465 if self.hashstate.mtimehash: |
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466 insts.append('reconnect') |
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467 if newhash.confighash != self.hashstate.confighash: |
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468 addr = _hashaddress(self.baseaddress, newhash.confighash) |
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469 insts.append('redirect %s' % addr) |
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470 _log('validate: %s\n' % insts) |
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471 self.cresult.write('\0'.join(insts) or '\0') |
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472 |
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473 def chdir(self): |
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474 """Change current directory |
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475 |
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476 Note that the behavior of --cwd option is bit different from this. |
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477 It does not affect --config parameter. |
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478 """ |
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479 path = self._readstr() |
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480 if not path: |
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481 return |
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482 _log('chdir to %r\n' % path) |
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483 os.chdir(path) |
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484 |
28159 | 485 def setumask(self): |
486 """Change umask""" | |
487 mask = struct.unpack('>I', self._read(4))[0] | |
488 _log('setumask %r\n' % mask) | |
489 os.umask(mask) | |
490 | |
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491 def getpager(self): |
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492 """Read cmdargs and write pager command to r-channel if enabled |
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493 |
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494 If pager isn't enabled, this writes '\0' because channeledoutput |
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495 does not allow to write empty data. |
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496 """ |
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497 args = self._readlist() |
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498 try: |
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499 cmd, _func, args, options, _cmdoptions = dispatch._parse(self.ui, |
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500 args) |
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501 except (error.Abort, error.AmbiguousCommand, error.CommandError, |
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502 error.UnknownCommand): |
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503 cmd = None |
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504 options = {} |
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505 if not cmd or 'pager' not in options: |
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506 self.cresult.write('\0') |
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507 return |
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508 |
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509 pagercmd = _setuppagercmd(self.ui, options, cmd) |
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510 if pagercmd: |
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511 self.cresult.write(pagercmd) |
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512 else: |
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513 self.cresult.write('\0') |
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514 |
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515 def setenv(self): |
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516 """Clear and update os.environ |
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517 |
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518 Note that not all variables can make an effect on the running process. |
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519 """ |
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chgserver: use _readlist and _readstr
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520 l = self._readlist() |
27792
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521 try: |
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522 newenv = dict(s.split('=', 1) for s in l) |
27792
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523 except ValueError: |
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|
524 raise ValueError('unexpected value in setenv request') |
28602
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chgserver: drop old hack to recreate ui on HGPLAIN change
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525 _log('setenv: %r\n' % sorted(newenv.keys())) |
27792
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526 os.environ.clear() |
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527 os.environ.update(newenv) |
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528 _clearenvaliases(commands.table) |
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529 |
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530 capabilities = commandserver.server.capabilities.copy() |
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|
531 capabilities.update({'attachio': attachio, |
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532 'chdir': chdir, |
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533 'getpager': getpager, |
28159 | 534 'setenv': setenv, |
535 'setumask': setumask}) | |
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|
536 |
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|
537 # copied from mercurial/commandserver.py |
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538 class _requesthandler(SocketServer.StreamRequestHandler): |
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539 def handle(self): |
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540 # use a different process group from the master process, making this |
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541 # process pass kernel "is_current_pgrp_orphaned" check so signals like |
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542 # SIGTSTP, SIGTTIN, SIGTTOU are not ignored. |
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543 os.setpgid(0, 0) |
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544 # change random state otherwise forked request handlers would have a |
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545 # same state inherited from parent. |
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|
546 random.seed() |
27792
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547 ui = self.server.ui |
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548 repo = self.server.repo |
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cmdserver: write early exception to 'e' channel in 'unix' mode
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549 sv = None |
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550 try: |
28511
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cmdserver: write early exception to 'e' channel in 'unix' mode
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551 sv = chgcmdserver(ui, repo, self.rfile, self.wfile, self.connection, |
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cmdserver: write early exception to 'e' channel in 'unix' mode
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552 self.server.hashstate, self.server.baseaddress) |
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553 try: |
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|
554 sv.serve() |
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555 # handle exceptions that may be raised by command server. most of |
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|
556 # known exceptions are caught by dispatch. |
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|
557 except error.Abort as inst: |
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|
558 ui.warn(_('abort: %s\n') % inst) |
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559 except IOError as inst: |
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|
560 if inst.errno != errno.EPIPE: |
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|
561 raise |
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|
562 except KeyboardInterrupt: |
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|
563 pass |
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|
564 finally: |
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|
565 sv.cleanup() |
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|
566 except: # re-raises |
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|
567 # also write traceback to error channel. otherwise client cannot |
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diff
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|
568 # see it because it is written to server's stderr by default. |
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cmdserver: write early exception to 'e' channel in 'unix' mode
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|
569 if sv: |
ff5f923fca3c
cmdserver: write early exception to 'e' channel in 'unix' mode
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|
570 cerr = sv.cerr |
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|
571 else: |
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572 cerr = commandserver.channeledoutput(self.wfile, 'e') |
ff5f923fca3c
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573 traceback.print_exc(file=cerr) |
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|
574 raise |
28553
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chgserver: add an explicit gc to trigger __del__
Jun Wu <quark@fb.com>
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|
575 finally: |
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|
576 # trigger __del__ since ForkingMixIn uses os._exit |
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Jun Wu <quark@fb.com>
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|
577 gc.collect() |
27792
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|
578 |
28223
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|
579 def _tempaddress(address): |
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580 return '%s.%d.tmp' % (address, os.getpid()) |
0a853dc9b306
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|
581 |
28326
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chgserver: mangle server address to include confighash
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diff
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|
582 def _hashaddress(address, hashstr): |
ea400a4f32e6
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Jun Wu <quark@fb.com>
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|
583 return '%s-%s' % (address, hashstr) |
ea400a4f32e6
chgserver: mangle server address to include confighash
Jun Wu <quark@fb.com>
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|
584 |
28223
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585 class AutoExitMixIn: # use old-style to comply with SocketServer design |
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
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|
586 lastactive = time.time() |
0a853dc9b306
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|
587 idletimeout = 3600 # default 1 hour |
0a853dc9b306
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|
588 |
0a853dc9b306
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|
589 def startautoexitthread(self): |
0a853dc9b306
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590 # note: the auto-exit check here is cheap enough to not use a thread, |
0a853dc9b306
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|
591 # be done in serve_forever. however SocketServer is hook-unfriendly, |
0a853dc9b306
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|
592 # you simply cannot hook serve_forever without copying a lot of code. |
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593 # besides, serve_forever's docstring suggests using thread. |
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
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594 thread = threading.Thread(target=self._autoexitloop) |
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|
595 thread.daemon = True |
0a853dc9b306
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596 thread.start() |
0a853dc9b306
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|
597 |
0a853dc9b306
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|
598 def _autoexitloop(self, interval=1): |
0a853dc9b306
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|
599 while True: |
0a853dc9b306
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|
600 time.sleep(interval) |
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
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|
601 if not self.issocketowner(): |
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
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changeset
|
602 _log('%s is not owned, exiting.\n' % self.server_address) |
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents:
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diff
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|
603 break |
0a853dc9b306
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Jun Wu <quark@fb.com>
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|
604 if time.time() - self.lastactive > self.idletimeout: |
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
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|
605 _log('being idle too long. exiting.\n') |
0a853dc9b306
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|
606 break |
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|
607 self.shutdown() |
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changeset
|
608 |
0a853dc9b306
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|
609 def process_request(self, request, address): |
0a853dc9b306
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|
610 self.lastactive = time.time() |
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|
611 return SocketServer.ForkingMixIn.process_request( |
0a853dc9b306
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|
612 self, request, address) |
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|
613 |
0a853dc9b306
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|
614 def server_bind(self): |
0a853dc9b306
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|
615 # use a unique temp address so we can stat the file and do ownership |
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|
616 # check later |
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|
617 tempaddress = _tempaddress(self.server_address) |
28768
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chgserver: use relative path at socket.bind
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|
618 # use relative path instead of full path at bind() if possible, since |
2461f33c9f97
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|
619 # AF_UNIX path has very small length limit (107 chars) on common |
2461f33c9f97
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|
620 # platforms (see sys/un.h) |
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|
621 dirname, basename = os.path.split(tempaddress) |
2461f33c9f97
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|
622 bakwdfd = None |
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|
623 if dirname: |
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|
624 bakwdfd = os.open('.', os.O_DIRECTORY) |
2461f33c9f97
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|
625 os.chdir(dirname) |
2461f33c9f97
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|
626 self.socket.bind(basename) |
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|
627 self._socketstat = os.stat(basename) |
28223
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diff
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|
628 # rename will replace the old socket file if exists atomically. the |
0a853dc9b306
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|
629 # old server will detect ownership change and exit. |
28768
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|
630 util.rename(basename, self.server_address) |
2461f33c9f97
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|
631 if bakwdfd: |
2461f33c9f97
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|
632 os.fchdir(bakwdfd) |
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|
633 os.close(bakwdfd) |
28223
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changeset
|
634 |
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|
635 def issocketowner(self): |
0a853dc9b306
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diff
changeset
|
636 try: |
0a853dc9b306
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changeset
|
637 stat = os.stat(self.server_address) |
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638 return (stat.st_ino == self._socketstat.st_ino and |
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639 stat.st_mtime == self._socketstat.st_mtime) |
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640 except OSError: |
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641 return False |
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642 |
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643 def unlinksocketfile(self): |
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644 if not self.issocketowner(): |
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645 return |
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646 # it is possible to have a race condition here that we may |
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647 # remove another server's socket file. but that's okay |
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648 # since that server will detect and exit automatically and |
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649 # the client will start a new server on demand. |
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650 try: |
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651 os.unlink(self.server_address) |
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652 except OSError as exc: |
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653 if exc.errno != errno.ENOENT: |
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654 raise |
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655 |
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656 class chgunixservice(commandserver.unixservice): |
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657 def init(self): |
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658 if self.repo: |
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659 # one chgserver can serve multiple repos. drop repo infomation |
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660 self.ui.setconfig('bundle', 'mainreporoot', '', 'repo') |
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661 self.repo = None |
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662 self._inithashstate() |
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663 self._checkextensions() |
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664 class cls(AutoExitMixIn, SocketServer.ForkingMixIn, |
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665 SocketServer.UnixStreamServer): |
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666 ui = self.ui |
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667 repo = self.repo |
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668 hashstate = self.hashstate |
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669 baseaddress = self.baseaddress |
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670 self.server = cls(self.address, _requesthandler) |
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671 self.server.idletimeout = self.ui.configint( |
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672 'chgserver', 'idletimeout', self.server.idletimeout) |
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673 self.server.startautoexitthread() |
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674 self._createsymlink() |
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675 |
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676 def _inithashstate(self): |
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677 self.baseaddress = self.address |
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678 if self.ui.configbool('chgserver', 'skiphash', False): |
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679 self.hashstate = None |
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680 return |
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681 self.hashstate = hashstate.fromui(self.ui) |
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682 self.address = _hashaddress(self.address, self.hashstate.confighash) |
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683 |
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684 def _checkextensions(self): |
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685 if not self.hashstate: |
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686 return |
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687 if extensions.notloaded(): |
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688 # one or more extensions failed to load. mtimehash becomes |
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689 # meaningless because we do not know the paths of those extensions. |
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690 # set mtimehash to an illegal hash value to invalidate the server. |
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691 self.hashstate.mtimehash = '' |
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692 |
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693 def _createsymlink(self): |
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694 if self.baseaddress == self.address: |
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695 return |
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696 tempaddress = _tempaddress(self.baseaddress) |
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697 os.symlink(os.path.basename(self.address), tempaddress) |
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698 util.rename(tempaddress, self.baseaddress) |
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699 |
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700 def run(self): |
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701 try: |
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702 self.server.serve_forever() |
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703 finally: |
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704 self.server.unlinksocketfile() |
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705 |
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706 def uisetup(ui): |
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707 commandserver._servicemap['chgunix'] = chgunixservice |
28261 | 708 |
709 # CHGINTERNALMARK is temporarily set by chg client to detect if chg will | |
710 # start another chg. drop it to avoid possible side effects. | |
711 if 'CHGINTERNALMARK' in os.environ: | |
712 del os.environ['CHGINTERNALMARK'] |