Mercurial > hg
annotate hgext/chgserver.py @ 29759:e584c6235500
py3: conditionalize the raise statement
raise E,V,T is not acceptable in Python 3, thats is conditionalized.
Moreover this will result in syntax error so we have to use exec() to
execute this. Related PEP- https://www.python.org/dev/peps/pep-3109/#id14
My implementation is motivated from the six implementation except they are
defining a new function exec_() to prevent adding an extra frame AFAIK :)
https://bitbucket.org/gutworth/six/src/ca4580a5a648/six.py#six.py-680
author | Pulkit Goyal <7895pulkit@gmail.com> |
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date | Mon, 08 Aug 2016 23:51:11 +0530 |
parents | a67398726747 |
children | d5883fd055c6 |
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 |
28325 | 31 Config |
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 errno |
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44 import hashlib |
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45 import inspect |
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46 import os |
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47 import re |
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48 import signal |
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49 import struct |
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50 import sys |
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51 import time |
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52 |
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53 from mercurial.i18n import _ |
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54 |
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55 from mercurial import ( |
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56 cmdutil, |
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57 commands, |
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58 commandserver, |
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59 dispatch, |
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60 error, |
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61 extensions, |
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62 osutil, |
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63 util, |
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64 ) |
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65 |
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66 # Note for extension authors: ONLY specify testedwith = 'internal' for |
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67 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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68 # be specifying the version(s) of Mercurial they are tested with, or |
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69 # leave the attribute unspecified. |
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70 testedwith = 'internal' |
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71 |
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72 _log = commandserver.log |
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73 |
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74 def _hashlist(items): |
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75 """return sha1 hexdigest for a list""" |
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76 return hashlib.sha1(str(items)).hexdigest() |
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77 |
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78 # sensitive config sections affecting confighash |
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79 _configsections = [ |
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80 'alias', # affects global state commands.table |
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81 'extdiff', # uisetup will register new commands |
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82 'extensions', |
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83 ] |
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84 |
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85 # sensitive environment variables affecting confighash |
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86 _envre = re.compile(r'''\A(?: |
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87 CHGHG |
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88 |HG.* |
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89 |LANG(?:UAGE)? |
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90 |LC_.* |
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91 |LD_.* |
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92 |PATH |
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93 |PYTHON.* |
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94 |TERM(?:INFO)? |
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95 |TZ |
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96 )\Z''', re.X) |
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97 |
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98 def _confighash(ui): |
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99 """return a quick hash for detecting config/env changes |
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100 |
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101 confighash is the hash of sensitive config items and environment variables. |
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102 |
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103 for chgserver, it is designed that once confighash changes, the server is |
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104 not qualified to serve its client and should redirect the client to a new |
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105 server. different from mtimehash, confighash change will not mark the |
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106 server outdated and exit since the user can have different configs at the |
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107 same time. |
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108 """ |
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109 sectionitems = [] |
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110 for section in _configsections: |
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111 sectionitems.append(ui.configitems(section)) |
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112 sectionhash = _hashlist(sectionitems) |
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113 envitems = [(k, v) for k, v in os.environ.iteritems() if _envre.match(k)] |
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114 envhash = _hashlist(sorted(envitems)) |
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115 return sectionhash[:6] + envhash[:6] |
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116 |
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117 def _getmtimepaths(ui): |
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118 """get a list of paths that should be checked to detect change |
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119 |
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120 The list will include: |
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121 - extensions (will not cover all files for complex extensions) |
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122 - mercurial/__version__.py |
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123 - python binary |
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124 """ |
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125 modules = [m for n, m in extensions.extensions(ui)] |
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126 try: |
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127 from mercurial import __version__ |
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128 modules.append(__version__) |
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129 except ImportError: |
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130 pass |
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131 files = [sys.executable] |
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132 for m in modules: |
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133 try: |
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134 files.append(inspect.getabsfile(m)) |
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135 except TypeError: |
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136 pass |
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137 return sorted(set(files)) |
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138 |
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139 def _mtimehash(paths): |
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140 """return a quick hash for detecting file changes |
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141 |
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142 mtimehash calls stat on given paths and calculate a hash based on size and |
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143 mtime of each file. mtimehash does not read file content because reading is |
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144 expensive. therefore it's not 100% reliable for detecting content changes. |
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145 it's possible to return different hashes for same file contents. |
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146 it's also possible to return a same hash for different file contents for |
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147 some carefully crafted situation. |
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148 |
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149 for chgserver, it is designed that once mtimehash changes, the server is |
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150 considered outdated immediately and should no longer provide service. |
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151 |
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152 mtimehash is not included in confighash because we only know the paths of |
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153 extensions after importing them (there is imp.find_module but that faces |
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154 race conditions). We need to calculate confighash without importing. |
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155 """ |
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156 def trystat(path): |
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157 try: |
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158 st = os.stat(path) |
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159 return (st.st_mtime, st.st_size) |
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160 except OSError: |
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161 # could be ENOENT, EPERM etc. not fatal in any case |
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162 pass |
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163 return _hashlist(map(trystat, paths))[:12] |
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164 |
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165 class hashstate(object): |
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166 """a structure storing confighash, mtimehash, paths used for mtimehash""" |
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167 def __init__(self, confighash, mtimehash, mtimepaths): |
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168 self.confighash = confighash |
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169 self.mtimehash = mtimehash |
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170 self.mtimepaths = mtimepaths |
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171 |
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172 @staticmethod |
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173 def fromui(ui, mtimepaths=None): |
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174 if mtimepaths is None: |
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175 mtimepaths = _getmtimepaths(ui) |
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176 confighash = _confighash(ui) |
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177 mtimehash = _mtimehash(mtimepaths) |
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178 _log('confighash = %s mtimehash = %s\n' % (confighash, mtimehash)) |
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179 return hashstate(confighash, mtimehash, mtimepaths) |
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180 |
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181 # copied from hgext/pager.py:uisetup() |
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182 def _setuppagercmd(ui, options, cmd): |
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183 if not ui.formatted(): |
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184 return |
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185 |
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186 p = ui.config("pager", "pager", os.environ.get("PAGER")) |
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187 usepager = False |
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188 always = util.parsebool(options['pager']) |
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189 auto = options['pager'] == 'auto' |
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190 |
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191 if not p: |
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192 pass |
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193 elif always: |
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194 usepager = True |
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195 elif not auto: |
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196 usepager = False |
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197 else: |
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198 attended = ['annotate', 'cat', 'diff', 'export', 'glog', 'log', 'qdiff'] |
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199 attend = ui.configlist('pager', 'attend', attended) |
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200 ignore = ui.configlist('pager', 'ignore') |
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201 cmds, _ = cmdutil.findcmd(cmd, commands.table) |
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202 |
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203 for cmd in cmds: |
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204 var = 'attend-%s' % cmd |
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205 if ui.config('pager', var): |
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206 usepager = ui.configbool('pager', var) |
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207 break |
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208 if (cmd in attend or |
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209 (cmd not in ignore and not attend)): |
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210 usepager = True |
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211 break |
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212 |
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213 if usepager: |
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214 ui.setconfig('ui', 'formatted', ui.formatted(), 'pager') |
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215 ui.setconfig('ui', 'interactive', False, 'pager') |
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216 return p |
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217 |
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218 def _newchgui(srcui, csystem): |
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219 class chgui(srcui.__class__): |
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220 def __init__(self, src=None): |
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221 super(chgui, self).__init__(src) |
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222 if src: |
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223 self._csystem = getattr(src, '_csystem', csystem) |
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224 else: |
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225 self._csystem = csystem |
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226 |
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227 def system(self, cmd, environ=None, cwd=None, onerr=None, |
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228 errprefix=None): |
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229 # fallback to the original system method if the output needs to be |
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230 # captured (to self._buffers), or the output stream is not stdout |
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231 # (e.g. stderr, cStringIO), because the chg client is not aware of |
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232 # these situations and will behave differently (write to stdout). |
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233 if (any(s[1] for s in self._bufferstates) |
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234 or not util.safehasattr(self.fout, 'fileno') |
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235 or self.fout.fileno() != sys.stdout.fileno()): |
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236 return super(chgui, self).system(cmd, environ, cwd, onerr, |
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237 errprefix) |
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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 _loadnewui(srcui, args): |
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262 newui = srcui.__class__() |
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263 for a in ['fin', 'fout', 'ferr', 'environ']: |
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264 setattr(newui, a, getattr(srcui, a)) |
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265 if util.safehasattr(srcui, '_csystem'): |
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266 newui._csystem = srcui._csystem |
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267 |
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268 # internal config: extensions.chgserver |
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269 newui.setconfig('extensions', 'chgserver', |
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270 srcui.config('extensions', 'chgserver'), '--config') |
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271 |
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272 # command line args |
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273 args = args[:] |
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274 dispatch._parseconfig(newui, dispatch._earlygetopt(['--config'], args)) |
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275 |
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276 # stolen from tortoisehg.util.copydynamicconfig() |
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277 for section, name, value in srcui.walkconfig(): |
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278 source = srcui.configsource(section, name) |
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279 if ':' in source or source == '--config': |
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280 # path:line or command line |
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281 continue |
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282 if source == 'none': |
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283 # ui.configsource returns 'none' by default |
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284 source = '' |
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285 newui.setconfig(section, name, value, source) |
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286 |
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287 # load wd and repo config, copied from dispatch.py |
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288 cwds = dispatch._earlygetopt(['--cwd'], args) |
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289 cwd = cwds and os.path.realpath(cwds[-1]) or None |
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290 rpath = dispatch._earlygetopt(["-R", "--repository", "--repo"], args) |
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291 path, newlui = dispatch._getlocal(newui, rpath, wd=cwd) |
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292 |
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293 return (newui, newlui) |
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294 |
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295 class channeledsystem(object): |
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296 """Propagate ui.system() request in the following format: |
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297 |
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298 payload length (unsigned int), |
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299 cmd, '\0', |
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300 cwd, '\0', |
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301 envkey, '=', val, '\0', |
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302 ... |
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303 envkey, '=', val |
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304 |
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305 and waits: |
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306 |
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307 exitcode length (unsigned int), |
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308 exitcode (int) |
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309 """ |
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310 def __init__(self, in_, out, channel): |
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311 self.in_ = in_ |
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312 self.out = out |
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313 self.channel = channel |
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314 |
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315 def __call__(self, cmd, environ, cwd): |
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316 args = [util.quotecommand(cmd), os.path.abspath(cwd or '.')] |
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317 args.extend('%s=%s' % (k, v) for k, v in environ.iteritems()) |
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318 data = '\0'.join(args) |
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319 self.out.write(struct.pack('>cI', self.channel, len(data))) |
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320 self.out.write(data) |
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321 self.out.flush() |
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322 |
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323 length = self.in_.read(4) |
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324 length, = struct.unpack('>I', length) |
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325 if length != 4: |
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326 raise error.Abort(_('invalid response')) |
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327 rc, = struct.unpack('>i', self.in_.read(4)) |
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328 return rc |
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329 |
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330 _iochannels = [ |
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331 # server.ch, ui.fp, mode |
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332 ('cin', 'fin', 'rb'), |
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333 ('cout', 'fout', 'wb'), |
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334 ('cerr', 'ferr', 'wb'), |
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335 ] |
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336 |
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337 class chgcmdserver(commandserver.server): |
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338 def __init__(self, ui, repo, fin, fout, sock, hashstate, baseaddress): |
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339 super(chgcmdserver, self).__init__( |
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340 _newchgui(ui, channeledsystem(fin, fout, 'S')), repo, fin, fout) |
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341 self.clientsock = sock |
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342 self._oldios = [] # original (self.ch, ui.fp, fd) before "attachio" |
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343 self.hashstate = hashstate |
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344 self.baseaddress = baseaddress |
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345 if hashstate is not None: |
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346 self.capabilities = self.capabilities.copy() |
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347 self.capabilities['validate'] = chgcmdserver.validate |
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348 |
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349 def cleanup(self): |
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350 super(chgcmdserver, self).cleanup() |
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351 # dispatch._runcatch() does not flush outputs if exception is not |
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352 # handled by dispatch._dispatch() |
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353 self.ui.flush() |
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354 self._restoreio() |
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355 |
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356 def attachio(self): |
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357 """Attach to client's stdio passed via unix domain socket; all |
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358 channels except cresult will no longer be used |
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359 """ |
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360 # tell client to sendmsg() with 1-byte payload, which makes it |
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361 # distinctive from "attachio\n" command consumed by client.read() |
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362 self.clientsock.sendall(struct.pack('>cI', 'I', 1)) |
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363 clientfds = osutil.recvfds(self.clientsock.fileno()) |
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364 _log('received fds: %r\n' % clientfds) |
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365 |
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366 ui = self.ui |
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367 ui.flush() |
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368 first = self._saveio() |
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369 for fd, (cn, fn, mode) in zip(clientfds, _iochannels): |
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370 assert fd > 0 |
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371 fp = getattr(ui, fn) |
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372 os.dup2(fd, fp.fileno()) |
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373 os.close(fd) |
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374 if not first: |
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375 continue |
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376 # reset buffering mode when client is first attached. as we want |
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377 # to see output immediately on pager, the mode stays unchanged |
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378 # when client re-attached. ferr is unchanged because it should |
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379 # be unbuffered no matter if it is a tty or not. |
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380 if fn == 'ferr': |
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381 newfp = fp |
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382 else: |
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383 # make it line buffered explicitly because the default is |
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384 # decided on first write(), where fout could be a pager. |
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385 if fp.isatty(): |
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386 bufsize = 1 # line buffered |
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387 else: |
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388 bufsize = -1 # system default |
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389 newfp = os.fdopen(fp.fileno(), mode, bufsize) |
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390 setattr(ui, fn, newfp) |
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391 setattr(self, cn, newfp) |
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392 |
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393 self.cresult.write(struct.pack('>i', len(clientfds))) |
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394 |
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395 def _saveio(self): |
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396 if self._oldios: |
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397 return False |
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398 ui = self.ui |
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399 for cn, fn, _mode in _iochannels: |
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400 ch = getattr(self, cn) |
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401 fp = getattr(ui, fn) |
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402 fd = os.dup(fp.fileno()) |
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403 self._oldios.append((ch, fp, fd)) |
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404 return True |
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405 |
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406 def _restoreio(self): |
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407 ui = self.ui |
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408 for (ch, fp, fd), (cn, fn, _mode) in zip(self._oldios, _iochannels): |
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409 newfp = getattr(ui, fn) |
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410 # close newfp while it's associated with client; otherwise it |
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411 # would be closed when newfp is deleted |
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412 if newfp is not fp: |
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413 newfp.close() |
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414 # restore original fd: fp is open again |
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415 os.dup2(fd, fp.fileno()) |
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416 os.close(fd) |
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417 setattr(self, cn, ch) |
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418 setattr(ui, fn, fp) |
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419 del self._oldios[:] |
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420 |
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421 def validate(self): |
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422 """Reload the config and check if the server is up to date |
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423 |
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424 Read a list of '\0' separated arguments. |
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425 Write a non-empty list of '\0' separated instruction strings or '\0' |
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426 if the list is empty. |
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427 An instruction string could be either: |
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428 - "unlink $path", the client should unlink the path to stop the |
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429 outdated server. |
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430 - "redirect $path", the client should attempt to connect to $path |
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431 first. If it does not work, start a new server. It implies |
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432 "reconnect". |
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433 - "exit $n", the client should exit directly with code n. |
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434 This may happen if we cannot parse the config. |
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435 - "reconnect", the client should close the connection and |
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436 reconnect. |
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437 If neither "reconnect" nor "redirect" is included in the instruction |
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438 list, the client can continue with this server after completing all |
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439 the instructions. |
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440 """ |
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441 args = self._readlist() |
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442 try: |
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443 self.ui, lui = _loadnewui(self.ui, args) |
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444 except error.ParseError as inst: |
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445 dispatch._formatparse(self.ui.warn, inst) |
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446 self.ui.flush() |
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447 self.cresult.write('exit 255') |
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448 return |
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449 newhash = hashstate.fromui(lui, self.hashstate.mtimepaths) |
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450 insts = [] |
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451 if newhash.mtimehash != self.hashstate.mtimehash: |
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452 addr = _hashaddress(self.baseaddress, self.hashstate.confighash) |
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453 insts.append('unlink %s' % addr) |
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454 # mtimehash is empty if one or more extensions fail to load. |
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455 # to be compatible with hg, still serve the client this time. |
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456 if self.hashstate.mtimehash: |
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457 insts.append('reconnect') |
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458 if newhash.confighash != self.hashstate.confighash: |
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459 addr = _hashaddress(self.baseaddress, newhash.confighash) |
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460 insts.append('redirect %s' % addr) |
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461 _log('validate: %s\n' % insts) |
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462 self.cresult.write('\0'.join(insts) or '\0') |
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463 |
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464 def chdir(self): |
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465 """Change current directory |
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466 |
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467 Note that the behavior of --cwd option is bit different from this. |
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468 It does not affect --config parameter. |
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469 """ |
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470 path = self._readstr() |
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471 if not path: |
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472 return |
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473 _log('chdir to %r\n' % path) |
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474 os.chdir(path) |
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475 |
28159 | 476 def setumask(self): |
477 """Change umask""" | |
478 mask = struct.unpack('>I', self._read(4))[0] | |
479 _log('setumask %r\n' % mask) | |
480 os.umask(mask) | |
481 | |
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482 def getpager(self): |
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483 """Read cmdargs and write pager command to r-channel if enabled |
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484 |
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485 If pager isn't enabled, this writes '\0' because channeledoutput |
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486 does not allow to write empty data. |
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487 """ |
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488 args = self._readlist() |
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489 try: |
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490 cmd, _func, args, options, _cmdoptions = dispatch._parse(self.ui, |
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491 args) |
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492 except (error.Abort, error.AmbiguousCommand, error.CommandError, |
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493 error.UnknownCommand): |
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494 cmd = None |
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495 options = {} |
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496 if not cmd or 'pager' not in options: |
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497 self.cresult.write('\0') |
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498 return |
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499 |
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500 pagercmd = _setuppagercmd(self.ui, options, cmd) |
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501 if pagercmd: |
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502 # Python's SIGPIPE is SIG_IGN by default. change to SIG_DFL so |
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503 # we can exit if the pipe to the pager is closed |
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504 if util.safehasattr(signal, 'SIGPIPE') and \ |
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505 signal.getsignal(signal.SIGPIPE) == signal.SIG_IGN: |
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506 signal.signal(signal.SIGPIPE, signal.SIG_DFL) |
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507 self.cresult.write(pagercmd) |
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508 else: |
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509 self.cresult.write('\0') |
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510 |
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511 def setenv(self): |
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512 """Clear and update os.environ |
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513 |
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|
514 Note that not all variables can make an effect on the running process. |
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|
515 """ |
28158
7cc57a531f0c
chgserver: use _readlist and _readstr
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diff
changeset
|
516 l = self._readlist() |
27792
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|
517 try: |
28158
7cc57a531f0c
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|
518 newenv = dict(s.split('=', 1) for s in l) |
27792
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|
519 except ValueError: |
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|
520 raise ValueError('unexpected value in setenv request') |
28602
83127a9fe76e
chgserver: drop old hack to recreate ui on HGPLAIN change
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diff
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|
521 _log('setenv: %r\n' % sorted(newenv.keys())) |
27792
980957333cfa
chgserver: import background server extension from cHg
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diff
changeset
|
522 os.environ.clear() |
980957333cfa
chgserver: import background server extension from cHg
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changeset
|
523 os.environ.update(newenv) |
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diff
changeset
|
524 |
980957333cfa
chgserver: import background server extension from cHg
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diff
changeset
|
525 capabilities = commandserver.server.capabilities.copy() |
980957333cfa
chgserver: import background server extension from cHg
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diff
changeset
|
526 capabilities.update({'attachio': attachio, |
980957333cfa
chgserver: import background server extension from cHg
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diff
changeset
|
527 'chdir': chdir, |
980957333cfa
chgserver: import background server extension from cHg
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diff
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|
528 'getpager': getpager, |
28159 | 529 'setenv': setenv, |
530 'setumask': setumask}) | |
27792
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chgserver: import background server extension from cHg
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parents:
diff
changeset
|
531 |
28223
0a853dc9b306
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diff
changeset
|
532 def _tempaddress(address): |
0a853dc9b306
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|
533 return '%s.%d.tmp' % (address, os.getpid()) |
0a853dc9b306
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diff
changeset
|
534 |
28326
ea400a4f32e6
chgserver: mangle server address to include confighash
Jun Wu <quark@fb.com>
parents:
28325
diff
changeset
|
535 def _hashaddress(address, hashstr): |
ea400a4f32e6
chgserver: mangle server address to include confighash
Jun Wu <quark@fb.com>
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28325
diff
changeset
|
536 return '%s-%s' % (address, hashstr) |
ea400a4f32e6
chgserver: mangle server address to include confighash
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parents:
28325
diff
changeset
|
537 |
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diff
changeset
|
538 class chgunixservicehandler(object): |
300318b7d66d
chgserver: switch to new forking service
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|
539 """Set of operations for chg services""" |
300318b7d66d
chgserver: switch to new forking service
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|
540 |
300318b7d66d
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|
541 pollinterval = 1 # [sec] |
300318b7d66d
chgserver: switch to new forking service
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|
542 |
300318b7d66d
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|
543 def __init__(self, ui): |
300318b7d66d
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544 self.ui = ui |
29598
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chgserver: rename private functions and variables of chgunixservicehandler
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545 self._idletimeout = ui.configint('chgserver', 'idletimeout', 3600) |
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|
546 self._lastactive = time.time() |
29547
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|
547 |
300318b7d66d
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|
548 def bindsocket(self, sock, address): |
29597
581c0c7cb258
chgserver: refactor initialization of real/base addresses
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diff
changeset
|
549 self._inithashstate(address) |
29545
28aca3fafc2a
chgserver: reorder service classes to make future patches readable
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diff
changeset
|
550 self._checkextensions() |
29547
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|
551 self._bind(sock) |
29545
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|
552 self._createsymlink() |
28aca3fafc2a
chgserver: reorder service classes to make future patches readable
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changeset
|
553 |
29597
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diff
changeset
|
554 def _inithashstate(self, address): |
29598
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changeset
|
555 self._baseaddress = address |
29545
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diff
changeset
|
556 if self.ui.configbool('chgserver', 'skiphash', False): |
29598
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diff
changeset
|
557 self._hashstate = None |
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diff
changeset
|
558 self._realaddress = address |
29545
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diff
changeset
|
559 return |
29598
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diff
changeset
|
560 self._hashstate = hashstate.fromui(self.ui) |
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
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diff
changeset
|
561 self._realaddress = _hashaddress(address, self._hashstate.confighash) |
29545
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chgserver: reorder service classes to make future patches readable
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diff
changeset
|
562 |
28aca3fafc2a
chgserver: reorder service classes to make future patches readable
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diff
changeset
|
563 def _checkextensions(self): |
29598
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chgserver: rename private functions and variables of chgunixservicehandler
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diff
changeset
|
564 if not self._hashstate: |
29545
28aca3fafc2a
chgserver: reorder service classes to make future patches readable
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diff
changeset
|
565 return |
28aca3fafc2a
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diff
changeset
|
566 if extensions.notloaded(): |
28aca3fafc2a
chgserver: reorder service classes to make future patches readable
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diff
changeset
|
567 # one or more extensions failed to load. mtimehash becomes |
28aca3fafc2a
chgserver: reorder service classes to make future patches readable
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parents:
29543
diff
changeset
|
568 # meaningless because we do not know the paths of those extensions. |
28aca3fafc2a
chgserver: reorder service classes to make future patches readable
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parents:
29543
diff
changeset
|
569 # set mtimehash to an illegal hash value to invalidate the server. |
29598
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
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diff
changeset
|
570 self._hashstate.mtimehash = '' |
29545
28aca3fafc2a
chgserver: reorder service classes to make future patches readable
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29543
diff
changeset
|
571 |
29547
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diff
changeset
|
572 def _bind(self, sock): |
28223
0a853dc9b306
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Jun Wu <quark@fb.com>
parents:
28159
diff
changeset
|
573 # use a unique temp address so we can stat the file and do ownership |
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents:
28159
diff
changeset
|
574 # check later |
29598
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
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29597
diff
changeset
|
575 tempaddress = _tempaddress(self._realaddress) |
29547
300318b7d66d
chgserver: switch to new forking service
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parents:
29546
diff
changeset
|
576 util.bindunixsocket(sock, tempaddress) |
29529
02de1dbd4f6e
chgserver: narrow scope of chdir() to socket.bind()
Yuya Nishihara <yuya@tcha.org>
parents:
29513
diff
changeset
|
577 self._socketstat = os.stat(tempaddress) |
02de1dbd4f6e
chgserver: narrow scope of chdir() to socket.bind()
Yuya Nishihara <yuya@tcha.org>
parents:
29513
diff
changeset
|
578 # rename will replace the old socket file if exists atomically. the |
02de1dbd4f6e
chgserver: narrow scope of chdir() to socket.bind()
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parents:
29513
diff
changeset
|
579 # old server will detect ownership change and exit. |
29598
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
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diff
changeset
|
580 util.rename(tempaddress, self._realaddress) |
28223
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
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28159
diff
changeset
|
581 |
29596
71c197d82b7e
chgserver: reorder functions in chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
29595
diff
changeset
|
582 def _createsymlink(self): |
29598
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
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parents:
29597
diff
changeset
|
583 if self._baseaddress == self._realaddress: |
29596
71c197d82b7e
chgserver: reorder functions in chgunixservicehandler
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parents:
29595
diff
changeset
|
584 return |
29598
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
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diff
changeset
|
585 tempaddress = _tempaddress(self._baseaddress) |
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
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diff
changeset
|
586 os.symlink(os.path.basename(self._realaddress), tempaddress) |
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
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diff
changeset
|
587 util.rename(tempaddress, self._baseaddress) |
29596
71c197d82b7e
chgserver: reorder functions in chgunixservicehandler
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parents:
29595
diff
changeset
|
588 |
29598
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
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29597
diff
changeset
|
589 def _issocketowner(self): |
28223
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents:
28159
diff
changeset
|
590 try: |
29598
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
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diff
changeset
|
591 stat = os.stat(self._realaddress) |
28223
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
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parents:
28159
diff
changeset
|
592 return (stat.st_ino == self._socketstat.st_ino and |
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents:
28159
diff
changeset
|
593 stat.st_mtime == self._socketstat.st_mtime) |
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents:
28159
diff
changeset
|
594 except OSError: |
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
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28159
diff
changeset
|
595 return False |
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents:
28159
diff
changeset
|
596 |
29547
300318b7d66d
chgserver: switch to new forking service
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diff
changeset
|
597 def unlinksocket(self, address): |
29598
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diff
changeset
|
598 if not self._issocketowner(): |
28223
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
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28159
diff
changeset
|
599 return |
0a853dc9b306
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Jun Wu <quark@fb.com>
parents:
28159
diff
changeset
|
600 # it is possible to have a race condition here that we may |
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
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28159
diff
changeset
|
601 # remove another server's socket file. but that's okay |
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents:
28159
diff
changeset
|
602 # since that server will detect and exit automatically and |
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents:
28159
diff
changeset
|
603 # the client will start a new server on demand. |
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents:
28159
diff
changeset
|
604 try: |
29598
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
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diff
changeset
|
605 os.unlink(self._realaddress) |
28223
0a853dc9b306
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28159
diff
changeset
|
606 except OSError as exc: |
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
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28159
diff
changeset
|
607 if exc.errno != errno.ENOENT: |
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents:
28159
diff
changeset
|
608 raise |
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents:
28159
diff
changeset
|
609 |
29596
71c197d82b7e
chgserver: reorder functions in chgunixservicehandler
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29595
diff
changeset
|
610 def printbanner(self, address): |
71c197d82b7e
chgserver: reorder functions in chgunixservicehandler
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29595
diff
changeset
|
611 # no "listening at" message should be printed to simulate hg behavior |
71c197d82b7e
chgserver: reorder functions in chgunixservicehandler
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diff
changeset
|
612 pass |
71c197d82b7e
chgserver: reorder functions in chgunixservicehandler
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diff
changeset
|
613 |
71c197d82b7e
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diff
changeset
|
614 def shouldexit(self): |
29598
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diff
changeset
|
615 if not self._issocketowner(): |
a67398726747
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diff
changeset
|
616 self.ui.debug('%s is not owned, exiting.\n' % self._realaddress) |
29596
71c197d82b7e
chgserver: reorder functions in chgunixservicehandler
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diff
changeset
|
617 return True |
29598
a67398726747
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diff
changeset
|
618 if time.time() - self._lastactive > self._idletimeout: |
29596
71c197d82b7e
chgserver: reorder functions in chgunixservicehandler
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diff
changeset
|
619 self.ui.debug('being idle too long. exiting.\n') |
71c197d82b7e
chgserver: reorder functions in chgunixservicehandler
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changeset
|
620 return True |
71c197d82b7e
chgserver: reorder functions in chgunixservicehandler
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diff
changeset
|
621 return False |
71c197d82b7e
chgserver: reorder functions in chgunixservicehandler
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diff
changeset
|
622 |
71c197d82b7e
chgserver: reorder functions in chgunixservicehandler
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diff
changeset
|
623 def newconnection(self): |
29598
a67398726747
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diff
changeset
|
624 self._lastactive = time.time() |
29596
71c197d82b7e
chgserver: reorder functions in chgunixservicehandler
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diff
changeset
|
625 |
29547
300318b7d66d
chgserver: switch to new forking service
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29546
diff
changeset
|
626 def createcmdserver(self, repo, conn, fin, fout): |
300318b7d66d
chgserver: switch to new forking service
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diff
changeset
|
627 return chgcmdserver(self.ui, repo, fin, fout, conn, |
29598
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
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diff
changeset
|
628 self._hashstate, self._baseaddress) |
28223
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chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents:
28159
diff
changeset
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629 |
29546
a7513390a9db
chgserver: extract stub factory of service object
Yuya Nishihara <yuya@tcha.org>
parents:
29545
diff
changeset
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630 def chgunixservice(ui, repo, opts): |
a7513390a9db
chgserver: extract stub factory of service object
Yuya Nishihara <yuya@tcha.org>
parents:
29545
diff
changeset
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631 if repo: |
a7513390a9db
chgserver: extract stub factory of service object
Yuya Nishihara <yuya@tcha.org>
parents:
29545
diff
changeset
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632 # one chgserver can serve multiple repos. drop repo infomation |
a7513390a9db
chgserver: extract stub factory of service object
Yuya Nishihara <yuya@tcha.org>
parents:
29545
diff
changeset
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633 ui.setconfig('bundle', 'mainreporoot', '', 'repo') |
29547
300318b7d66d
chgserver: switch to new forking service
Yuya Nishihara <yuya@tcha.org>
parents:
29546
diff
changeset
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634 h = chgunixservicehandler(ui) |
300318b7d66d
chgserver: switch to new forking service
Yuya Nishihara <yuya@tcha.org>
parents:
29546
diff
changeset
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635 return commandserver.unixforkingservice(ui, repo=None, opts=opts, handler=h) |
29546
a7513390a9db
chgserver: extract stub factory of service object
Yuya Nishihara <yuya@tcha.org>
parents:
29545
diff
changeset
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636 |
27792
980957333cfa
chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff
changeset
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637 def uisetup(ui): |
980957333cfa
chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff
changeset
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638 commandserver._servicemap['chgunix'] = chgunixservice |
28261 | 639 |
640 # CHGINTERNALMARK is temporarily set by chg client to detect if chg will | |
641 # start another chg. drop it to avoid possible side effects. | |
642 if 'CHGINTERNALMARK' in os.environ: | |
643 del os.environ['CHGINTERNALMARK'] |