Mercurial > hg
annotate hgext/inotify/server.py @ 10239:8e4be44a676f
Find right hg command for detached process
On Windows, Mercurial can be run from the python script of from a frozen
executable. In the first case, we have to call the python interpreter since the
script is not executable. Frozen executable can be called directly.
Fix 3/3 for issue421
author | Patrick Mezard <pmezard@gmail.com> |
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date | Wed, 06 Jan 2010 21:11:58 +0100 |
parents | a3ad96ead8f0 |
children | d6512b3e9ac0 |
rev | line source |
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inotify: create a common, OS-independent server entry point
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1 # server.py - common entry point for inotify status server |
6239 | 2 # |
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3 # Copyright 2009 Nicolas Dumazet <nicdumz@gmail.com> |
6239 | 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, incorporated herein by reference. |
6239 | 7 |
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8 from mercurial.i18n import _ |
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9 from mercurial import cmdutil, osutil, util |
6239 | 10 import common |
11 | |
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12 import errno |
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13 import os |
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14 import socket |
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15 import stat |
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16 import struct |
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17 import sys |
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18 import tempfile |
6239 | 19 |
20 class AlreadyStartedException(Exception): pass | |
21 | |
22 def join(a, b): | |
23 if a: | |
24 if a[-1] == '/': | |
25 return a + b | |
26 return a + '/' + b | |
27 return b | |
28 | |
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29 def split(path): |
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30 c = path.rfind('/') |
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31 if c == -1: |
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32 return '', path |
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33 return path[:c], path[c+1:] |
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34 |
6239 | 35 walk_ignored_errors = (errno.ENOENT, errno.ENAMETOOLONG) |
36 | |
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37 def walk(dirstate, absroot, root): |
6239 | 38 '''Like os.walk, but only yields regular files.''' |
39 | |
40 # This function is critical to performance during startup. | |
41 | |
42 def walkit(root, reporoot): | |
43 files, dirs = [], [] | |
44 | |
45 try: | |
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46 fullpath = join(absroot, root) |
6239 | 47 for name, kind in osutil.listdir(fullpath): |
48 if kind == stat.S_IFDIR: | |
49 if name == '.hg': | |
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50 if not reporoot: |
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51 return |
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52 else: |
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53 dirs.append(name) |
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54 path = join(root, name) |
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55 if dirstate._ignore(path): |
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56 continue |
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57 for result in walkit(path, False): |
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58 yield result |
6239 | 59 elif kind in (stat.S_IFREG, stat.S_IFLNK): |
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60 files.append(name) |
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61 yield fullpath, dirs, files |
6239 | 62 |
63 except OSError, err: | |
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64 if err.errno == errno.ENOTDIR: |
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65 # fullpath was a directory, but has since been replaced |
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66 # by a file. |
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67 yield fullpath, dirs, files |
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68 elif err.errno not in walk_ignored_errors: |
6239 | 69 raise |
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70 |
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71 return walkit(root, root == '') |
6239 | 72 |
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73 class directory(object): |
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74 """ |
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75 Representing a directory |
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76 |
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77 * path is the relative path from repo root to this directory |
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78 * files is a dict listing the files in this directory |
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79 - keys are file names |
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80 - values are file status |
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81 * dirs is a dict listing the subdirectories |
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82 - key are subdirectories names |
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83 - values are directory objects |
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84 """ |
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85 def __init__(self, relpath=''): |
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86 self.path = relpath |
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87 self.files = {} |
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88 self.dirs = {} |
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89 |
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90 def dir(self, relpath): |
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91 """ |
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92 Returns the directory contained at the relative path relpath. |
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93 Creates the intermediate directories if necessary. |
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94 """ |
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95 if not relpath: |
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96 return self |
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97 l = relpath.split('/') |
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98 ret = self |
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99 while l: |
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100 next = l.pop(0) |
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101 try: |
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102 ret = ret.dirs[next] |
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103 except KeyError: |
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104 d = directory(join(ret.path, next)) |
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105 ret.dirs[next] = d |
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106 ret = d |
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107 return ret |
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108 |
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109 def walk(self, states, visited=None): |
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110 """ |
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111 yield (filename, status) pairs for items in the trees |
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112 that have status in states. |
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113 filenames are relative to the repo root |
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114 """ |
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115 for file, st in self.files.iteritems(): |
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116 if st in states: |
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117 yield join(self.path, file), st |
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118 for dir in self.dirs.itervalues(): |
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119 if visited is not None: |
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120 visited.add(dir.path) |
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121 for e in dir.walk(states): |
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122 yield e |
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123 |
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124 def lookup(self, states, path, visited): |
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125 """ |
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126 yield root-relative filenames that match path, and whose |
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127 status are in states: |
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128 * if path is a file, yield path |
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129 * if path is a directory, yield directory files |
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130 * if path is not tracked, yield nothing |
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131 """ |
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132 if path[-1] == '/': |
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133 path = path[:-1] |
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134 |
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135 paths = path.split('/') |
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136 |
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137 # we need to check separately for last node |
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138 last = paths.pop() |
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139 |
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140 tree = self |
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141 try: |
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142 for dir in paths: |
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143 tree = tree.dirs[dir] |
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144 except KeyError: |
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145 # path is not tracked |
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146 visited.add(tree.path) |
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147 return |
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148 |
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149 try: |
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150 # if path is a directory, walk it |
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151 target = tree.dirs[last] |
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152 visited.add(target.path) |
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153 for file, st in target.walk(states, visited): |
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154 yield file |
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155 except KeyError: |
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156 try: |
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157 if tree.files[last] in states: |
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158 # path is a file |
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159 visited.add(tree.path) |
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160 yield path |
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161 except KeyError: |
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162 # path is not tracked |
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163 pass |
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164 |
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165 class repowatcher(object): |
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166 """ |
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167 Watches inotify events |
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168 """ |
6239 | 169 statuskeys = 'almr!?' |
170 | |
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171 def __init__(self, ui, dirstate, root): |
6239 | 172 self.ui = ui |
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173 self.dirstate = dirstate |
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174 |
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175 self.wprefix = join(root, '') |
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176 self.prefixlen = len(self.wprefix) |
6239 | 177 |
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178 self.tree = directory() |
6239 | 179 self.statcache = {} |
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180 self.statustrees = dict([(s, directory()) for s in self.statuskeys]) |
6239 | 181 |
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182 self.ds_info = self.dirstate_info() |
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183 |
6239 | 184 self.last_event = None |
185 | |
186 | |
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187 def handle_timeout(self): |
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188 pass |
6239 | 189 |
190 def dirstate_info(self): | |
191 try: | |
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192 st = os.lstat(self.wprefix + '.hg/dirstate') |
6239 | 193 return st.st_mtime, st.st_ino |
194 except OSError, err: | |
195 if err.errno != errno.ENOENT: | |
196 raise | |
197 return 0, 0 | |
198 | |
199 def filestatus(self, fn, st): | |
200 try: | |
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201 type_, mode, size, time = self.dirstate._map[fn][:4] |
6239 | 202 except KeyError: |
203 type_ = '?' | |
204 if type_ == 'n': | |
205 st_mode, st_size, st_mtime = st | |
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206 if size == -1: |
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207 return 'l' |
6239 | 208 if size and (size != st_size or (mode ^ st_mode) & 0100): |
209 return 'm' | |
210 if time != int(st_mtime): | |
211 return 'l' | |
212 return 'n' | |
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213 if type_ == '?' and self.dirstate._ignore(fn): |
6239 | 214 return 'i' |
215 return type_ | |
216 | |
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217 def updatefile(self, wfn, osstat): |
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218 ''' |
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219 update the file entry of an existing file. |
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220 |
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221 osstat: (mode, size, time) tuple, as returned by os.lstat(wfn) |
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222 ''' |
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223 |
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224 self._updatestatus(wfn, self.filestatus(wfn, osstat)) |
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225 |
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226 def deletefile(self, wfn, oldstatus): |
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227 ''' |
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228 update the entry of a file which has been deleted. |
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229 |
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230 oldstatus: char in statuskeys, status of the file before deletion |
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231 ''' |
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232 if oldstatus == 'r': |
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233 newstatus = 'r' |
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234 elif oldstatus in 'almn': |
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235 newstatus = '!' |
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236 else: |
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237 newstatus = None |
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238 |
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239 self.statcache.pop(wfn, None) |
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240 self._updatestatus(wfn, newstatus) |
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241 |
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242 def _updatestatus(self, wfn, newstatus): |
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243 ''' |
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244 Update the stored status of a file. |
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245 |
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246 newstatus: - char in (statuskeys + 'ni'), new status to apply. |
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247 - or None, to stop tracking wfn |
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248 ''' |
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249 root, fn = split(wfn) |
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250 d = self.tree.dir(root) |
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251 |
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252 oldstatus = d.files.get(fn) |
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253 # oldstatus can be either: |
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254 # - None : fn is new |
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255 # - a char in statuskeys: fn is a (tracked) file |
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256 |
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257 if self.ui.debugflag and oldstatus != newstatus: |
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258 self.ui.note(_('status: %r %s -> %s\n') % |
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259 (wfn, oldstatus, newstatus)) |
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260 |
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261 if oldstatus and oldstatus in self.statuskeys \ |
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262 and oldstatus != newstatus: |
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263 del self.statustrees[oldstatus].dir(root).files[fn] |
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264 |
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265 if newstatus in (None, 'i'): |
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266 d.files.pop(fn, None) |
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267 elif oldstatus != newstatus: |
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268 d.files[fn] = newstatus |
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269 if newstatus != 'n': |
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270 self.statustrees[newstatus].dir(root).files[fn] = newstatus |
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271 |
6239 | 272 def check_deleted(self, key): |
273 # Files that had been deleted but were present in the dirstate | |
274 # may have vanished from the dirstate; we must clean them up. | |
275 nuke = [] | |
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276 for wfn, ignore in self.statustrees[key].walk(key): |
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277 if wfn not in self.dirstate: |
6239 | 278 nuke.append(wfn) |
279 for wfn in nuke: | |
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280 root, fn = split(wfn) |
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281 del self.statustrees[key].dir(root).files[fn] |
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282 del self.tree.dir(root).files[fn] |
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283 |
6239 | 284 def update_hgignore(self): |
285 # An update of the ignore file can potentially change the | |
286 # states of all unknown and ignored files. | |
287 | |
288 # XXX If the user has other ignore files outside the repo, or | |
289 # changes their list of ignore files at run time, we'll | |
290 # potentially never see changes to them. We could get the | |
291 # client to report to us what ignore data they're using. | |
292 # But it's easier to do nothing than to open that can of | |
293 # worms. | |
294 | |
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295 if '_ignore' in self.dirstate.__dict__: |
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296 delattr(self.dirstate, '_ignore') |
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297 self.ui.note(_('rescanning due to .hgignore change\n')) |
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298 self.handle_timeout() |
6239 | 299 self.scan() |
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300 |
6239 | 301 def getstat(self, wpath): |
302 try: | |
303 return self.statcache[wpath] | |
304 except KeyError: | |
305 try: | |
306 return self.stat(wpath) | |
307 except OSError, err: | |
308 if err.errno != errno.ENOENT: | |
309 raise | |
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310 |
6239 | 311 def stat(self, wpath): |
312 try: | |
313 st = os.lstat(join(self.wprefix, wpath)) | |
314 ret = st.st_mode, st.st_size, st.st_mtime | |
315 self.statcache[wpath] = ret | |
316 return ret | |
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317 except OSError: |
6239 | 318 self.statcache.pop(wpath, None) |
319 raise | |
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320 |
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321 class socketlistener(object): |
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322 """ |
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323 Listens for client queries on unix socket inotify.sock |
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324 """ |
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325 def __init__(self, ui, root, repowatcher, timeout): |
6239 | 326 self.ui = ui |
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327 self.repowatcher = repowatcher |
6239 | 328 self.sock = socket.socket(socket.AF_UNIX) |
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329 self.sockpath = join(root, '.hg/inotify.sock') |
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330 self.realsockpath = None |
6239 | 331 try: |
332 self.sock.bind(self.sockpath) | |
333 except socket.error, err: | |
334 if err[0] == errno.EADDRINUSE: | |
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335 raise AlreadyStartedException( _('cannot start: socket is ' |
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336 'already bound')) |
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337 if err[0] == "AF_UNIX path too long": |
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338 if os.path.islink(self.sockpath) and \ |
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339 not os.path.exists(self.sockpath): |
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340 raise util.Abort('inotify-server: cannot start: ' |
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341 '.hg/inotify.sock is a broken symlink') |
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342 tempdir = tempfile.mkdtemp(prefix="hg-inotify-") |
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343 self.realsockpath = os.path.join(tempdir, "inotify.sock") |
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344 try: |
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345 self.sock.bind(self.realsockpath) |
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346 os.symlink(self.realsockpath, self.sockpath) |
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347 except (OSError, socket.error), inst: |
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348 try: |
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349 os.unlink(self.realsockpath) |
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350 except: |
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351 pass |
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352 os.rmdir(tempdir) |
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353 if inst.errno == errno.EEXIST: |
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354 raise AlreadyStartedException(_('cannot start: tried ' |
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355 'linking .hg/inotify.sock to a temporary socket but' |
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356 ' .hg/inotify.sock already exists')) |
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357 raise |
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358 else: |
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359 raise |
6239 | 360 self.sock.listen(5) |
361 self.fileno = self.sock.fileno | |
362 | |
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363 def answer_stat_query(self, cs): |
6239 | 364 names = cs.read().split('\0') |
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365 |
6239 | 366 states = names.pop() |
367 | |
368 self.ui.note(_('answering query for %r\n') % states) | |
369 | |
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370 visited = set() |
6239 | 371 if not names: |
372 def genresult(states, tree): | |
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373 for fn, state in tree.walk(states): |
6239 | 374 yield fn |
375 else: | |
376 def genresult(states, tree): | |
377 for fn in names: | |
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|
378 for f in tree.lookup(states, fn, visited): |
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379 yield f |
6239 | 380 |
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381 return ['\0'.join(r) for r in [ |
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382 genresult('l', self.repowatcher.statustrees['l']), |
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383 genresult('m', self.repowatcher.statustrees['m']), |
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384 genresult('a', self.repowatcher.statustrees['a']), |
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385 genresult('r', self.repowatcher.statustrees['r']), |
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386 genresult('!', self.repowatcher.statustrees['!']), |
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387 '?' in states |
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388 and genresult('?', self.repowatcher.statustrees['?']) |
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389 or [], |
6239 | 390 [], |
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391 'c' in states and genresult('n', self.repowatcher.tree) or [], |
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392 visited |
6239 | 393 ]] |
394 | |
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395 def answer_dbug_query(self): |
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396 return ['\0'.join(self.repowatcher.debug())] |
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397 |
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398 def accept_connection(self): |
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399 sock, addr = self.sock.accept() |
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400 |
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401 cs = common.recvcs(sock) |
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402 version = ord(cs.read(1)) |
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403 |
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404 if version != common.version: |
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405 self.ui.warn(_('received query from incompatible client ' |
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406 'version %d\n') % version) |
8952
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407 try: |
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408 # try to send back our version to the client |
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409 # this way, the client too is informed of the mismatch |
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410 sock.sendall(chr(common.version)) |
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411 except: |
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412 pass |
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413 return |
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414 |
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415 type = cs.read(4) |
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416 |
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417 if type == 'STAT': |
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418 results = self.answer_stat_query(cs) |
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419 elif type == 'DBUG': |
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420 results = self.answer_dbug_query() |
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421 else: |
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422 self.ui.warn(_('unrecognized query type: %s\n') % type) |
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423 return |
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424 |
6239 | 425 try: |
426 try: | |
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427 v = chr(common.version) |
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428 |
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429 sock.sendall(v + type + struct.pack(common.resphdrfmts[type], |
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430 *map(len, results))) |
6239 | 431 sock.sendall(''.join(results)) |
432 finally: | |
433 sock.shutdown(socket.SHUT_WR) | |
434 except socket.error, err: | |
435 if err[0] != errno.EPIPE: | |
436 raise | |
437 | |
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438 if sys.platform == 'linux2': |
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439 import linuxserver as _server |
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440 else: |
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441 raise ImportError |
6239 | 442 |
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443 master = _server.master |
6239 | 444 |
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445 def start(ui, dirstate, root, opts): |
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446 timeout = opts.get('timeout') |
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447 if timeout: |
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448 timeout = float(timeout) * 1e3 |
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449 |
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450 class service(object): |
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451 def init(self): |
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452 try: |
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453 self.master = master(ui, dirstate, root, timeout) |
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454 except AlreadyStartedException, inst: |
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455 raise util.Abort("inotify-server: %s" % inst) |
6239 | 456 |
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457 def run(self): |
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458 try: |
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459 self.master.run() |
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460 finally: |
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461 self.master.shutdown() |
6239 | 462 |
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463 if 'inserve' not in sys.argv: |
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464 runargs = util.hgcmd() + ['inserve', '-R', root] |
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465 else: |
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466 runargs = util.hgcmd() + sys.argv[1:] |
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467 |
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468 pidfile = ui.config('inotify', 'pidfile') |
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469 if opts['daemon'] and pidfile is not None and 'pid-file' not in runargs: |
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470 runargs.append("--pid-file=%s" % pidfile) |
6239 | 471 |
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472 service = service() |
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473 logfile = ui.config('inotify', 'log') |
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474 |
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475 appendpid = ui.configbool('inotify', 'appendpid', False) |
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476 |
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477 cmdutil.service(opts, initfn=service.init, runfn=service.run, |
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478 logfile=logfile, runargs=runargs, appendpid=appendpid) |