Mercurial > hg
annotate hgext/inotify/client.py @ 20279:5b4f963d21cc
merge: refactor initialization of variables in update
There is no code change here but this helps prepare for future commits that
will fix a bare update with obsolete markers.
author | Sean Farley <sean.michael.farley@gmail.com> |
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date | Wed, 06 Nov 2013 17:02:07 -0600 |
parents | 3cb9468535bd |
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rev | line source |
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6239 | 1 # client.py - inotify status client |
2 # | |
3 # Copyright 2006, 2007, 2008 Bryan O'Sullivan <bos@serpentine.com> | |
4 # Copyright 2007, 2008 Brendan Cully <brendan@kublai.com> | |
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5 # Copyright 2009 Nicolas Dumazet <nicdumz@gmail.com> |
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7 # This software may be used and distributed according to the terms of the |
10263 | 8 # GNU General Public License version 2 or any later version. |
6239 | 9 |
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10 from mercurial.i18n import _ |
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11 import common, server |
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12 import errno, os, socket, struct |
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13 |
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14 class QueryFailed(Exception): |
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15 pass |
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16 |
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17 def start_server(function): |
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18 """ |
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19 Decorator. |
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20 Tries to call function, if it fails, try to (re)start inotify server. |
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21 Raise QueryFailed if something went wrong |
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22 """ |
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23 def decorated_function(self, *args): |
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24 try: |
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25 return function(self, *args) |
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26 except (OSError, socket.error), err: |
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27 autostart = self.ui.configbool('inotify', 'autostart', True) |
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28 |
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29 if err.args[0] == errno.ECONNREFUSED: |
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30 self.ui.warn(_('inotify-client: found dead inotify server ' |
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31 'socket; removing it\n')) |
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32 os.unlink(os.path.join(self.root, '.hg', 'inotify.sock')) |
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33 if err.args[0] in (errno.ECONNREFUSED, errno.ENOENT) and autostart: |
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34 try: |
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35 try: |
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36 server.start(self.ui, self.dirstate, self.root, |
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37 dict(daemon=True, daemon_pipefds='')) |
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38 except server.AlreadyStartedException, inst: |
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39 # another process may have started its own |
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40 # inotify server while this one was starting. |
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41 self.ui.debug(str(inst)) |
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42 except Exception, inst: |
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43 self.ui.warn(_('inotify-client: could not start inotify ' |
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44 'server: %s\n') % inst) |
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45 else: |
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46 try: |
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47 return function(self, *args) |
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48 except socket.error, err: |
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49 self.ui.warn(_('inotify-client: could not talk to new ' |
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50 'inotify server: %s\n') % err.args[-1]) |
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51 elif err.args[0] in (errno.ECONNREFUSED, errno.ENOENT): |
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52 # silently ignore normal errors if autostart is False |
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53 self.ui.debug('(inotify server not running)\n') |
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54 else: |
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55 self.ui.warn(_('inotify-client: failed to contact inotify ' |
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56 'server: %s\n') % err.args[-1]) |
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57 |
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58 self.ui.traceback() |
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59 raise QueryFailed('inotify query failed') |
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60 |
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61 return decorated_function |
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62 |
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64 class client(object): |
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65 def __init__(self, ui, repo): |
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66 self.ui = ui |
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67 self.dirstate = repo.dirstate |
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68 self.root = repo.root |
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69 self.sock = socket.socket(socket.AF_UNIX) |
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70 |
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71 def _connect(self): |
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72 sockpath = os.path.join(self.root, '.hg', 'inotify.sock') |
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73 try: |
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74 self.sock.connect(sockpath) |
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75 except socket.error, err: |
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76 if err.args[0] == "AF_UNIX path too long": |
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77 sockpath = os.readlink(sockpath) |
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78 self.sock.connect(sockpath) |
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79 else: |
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80 raise |
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82 def _send(self, type, data): |
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83 """Sends protocol version number, and the data""" |
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84 self.sock.sendall(chr(common.version) + type + data) |
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85 |
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86 self.sock.shutdown(socket.SHUT_WR) |
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88 def _receive(self, type): |
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89 """ |
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90 Read data, check version number, extract headers, |
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91 and returns a tuple (data descriptor, header) |
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92 Raises QueryFailed on error |
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93 """ |
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94 cs = common.recvcs(self.sock) |
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95 try: |
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96 version = ord(cs.read(1)) |
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97 except TypeError: |
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98 # empty answer, assume the server crashed |
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99 self.ui.warn(_('inotify-client: received empty answer from inotify ' |
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100 'server')) |
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101 raise QueryFailed('server crashed') |
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102 |
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103 if version != common.version: |
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104 self.ui.warn(_('(inotify: received response from incompatible ' |
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105 'server version %d)\n') % version) |
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106 raise QueryFailed('incompatible server version') |
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108 readtype = cs.read(4) |
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109 if readtype != type: |
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110 self.ui.warn(_('(inotify: received \'%s\' response when expecting' |
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111 ' \'%s\')\n') % (readtype, type)) |
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112 raise QueryFailed('wrong response type') |
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113 |
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114 hdrfmt = common.resphdrfmts[type] |
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115 hdrsize = common.resphdrsizes[type] |
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116 try: |
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117 resphdr = struct.unpack(hdrfmt, cs.read(hdrsize)) |
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118 except struct.error: |
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119 raise QueryFailed('unable to retrieve query response headers') |
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121 return cs, resphdr |
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122 |
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123 def query(self, type, req): |
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124 self._connect() |
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126 self._send(type, req) |
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127 |
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128 return self._receive(type) |
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129 |
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130 @start_server |
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131 def statusquery(self, names, match, ignored, clean, unknown=True): |
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133 def genquery(): |
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134 for n in names: |
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135 yield n |
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136 states = 'almrx!' |
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137 if ignored: |
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138 raise ValueError('this is insanity') |
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139 if clean: |
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140 states += 'c' |
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141 if unknown: |
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142 states += '?' |
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143 yield states |
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144 |
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145 req = '\0'.join(genquery()) |
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147 cs, resphdr = self.query('STAT', req) |
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148 |
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149 def readnames(nbytes): |
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150 if nbytes: |
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151 names = cs.read(nbytes) |
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152 if names: |
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153 return filter(match, names.split('\0')) |
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154 return [] |
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155 results = tuple(map(readnames, resphdr[:-1])) |
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156 |
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157 if names: |
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158 nbytes = resphdr[-1] |
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159 vdirs = cs.read(nbytes) |
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160 if vdirs: |
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161 for vdir in vdirs.split('\0'): |
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162 if match.explicitdir: |
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163 match.explicitdir(vdir) |
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164 |
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165 return results |
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166 |
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167 @start_server |
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168 def debugquery(self): |
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169 cs, resphdr = self.query('DBUG', '') |
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170 |
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171 nbytes = resphdr[0] |
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172 names = cs.read(nbytes) |
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173 return names.split('\0') |