Mercurial > hg
annotate hgext/inotify/client.py @ 11943:2d3cbcace897
inotify: show the exact command used to start the server
author | Greg Ward <greg-hg@gerg.ca> |
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date | Fri, 13 Aug 2010 13:16:34 -0400 |
parents | 0c23085f051f |
children | 516b000fbb7e |
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 result = None |
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25 try: |
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26 return function(self, *args) |
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27 except (OSError, socket.error), err: |
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28 autostart = self.ui.configbool('inotify', 'autostart', True) |
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29 |
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30 if err.args[0] == errno.ECONNREFUSED: |
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31 self.ui.warn(_('inotify-client: found dead inotify server ' |
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32 'socket; removing it\n')) |
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33 os.unlink(os.path.join(self.root, '.hg', 'inotify.sock')) |
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34 if err.args[0] in (errno.ECONNREFUSED, errno.ENOENT) and autostart: |
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35 try: |
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36 try: |
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37 server.start(self.ui, self.dirstate, self.root, |
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38 dict(daemon=True, daemon_pipefds='')) |
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39 except server.AlreadyStartedException, inst: |
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40 # another process may have started its own |
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41 # inotify server while this one was starting. |
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42 self.ui.debug(str(inst)) |
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43 except Exception, inst: |
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44 self.ui.warn(_('inotify-client: could not start inotify ' |
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45 'server: %s\n') % inst) |
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46 else: |
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47 try: |
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48 return function(self, *args) |
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49 except socket.error, err: |
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50 self.ui.warn(_('inotify-client: could not talk to new ' |
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51 'inotify server: %s\n') % err.args[-1]) |
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52 elif err.args[0] in (errno.ECONNREFUSED, errno.ENOENT): |
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53 # silently ignore normal errors if autostart is False |
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54 self.ui.debug('(inotify server not running)\n') |
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55 else: |
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56 self.ui.warn(_('inotify-client: failed to contact inotify ' |
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57 'server: %s\n') % err.args[-1]) |
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58 |
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59 self.ui.traceback() |
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60 raise QueryFailed('inotify query failed') |
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61 |
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62 return decorated_function |
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63 |
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65 class client(object): |
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66 def __init__(self, ui, repo): |
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67 self.ui = ui |
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68 self.dirstate = repo.dirstate |
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69 self.root = repo.root |
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70 self.sock = socket.socket(socket.AF_UNIX) |
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71 |
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72 def _connect(self): |
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73 sockpath = os.path.join(self.root, '.hg', 'inotify.sock') |
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74 try: |
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75 self.sock.connect(sockpath) |
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76 except socket.error, err: |
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77 if err.args[0] == "AF_UNIX path too long": |
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78 sockpath = os.readlink(sockpath) |
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79 self.sock.connect(sockpath) |
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80 else: |
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81 raise |
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83 def _send(self, type, data): |
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84 """Sends protocol version number, and the data""" |
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85 self.sock.sendall(chr(common.version) + type + data) |
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86 |
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87 self.sock.shutdown(socket.SHUT_WR) |
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89 def _receive(self, type): |
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90 """ |
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91 Read data, check version number, extract headers, |
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92 and returns a tuple (data descriptor, header) |
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93 Raises QueryFailed on error |
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94 """ |
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95 cs = common.recvcs(self.sock) |
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96 try: |
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97 version = ord(cs.read(1)) |
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98 except TypeError: |
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99 # empty answer, assume the server crashed |
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100 self.ui.warn(_('inotify-client: received empty answer from inotify ' |
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101 'server')) |
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102 raise QueryFailed('server crashed') |
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103 |
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104 if version != common.version: |
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105 self.ui.warn(_('(inotify: received response from incompatible ' |
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106 'server version %d)\n') % version) |
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107 raise QueryFailed('incompatible server version') |
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109 readtype = cs.read(4) |
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110 if readtype != type: |
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111 self.ui.warn(_('(inotify: received \'%s\' response when expecting' |
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112 ' \'%s\')\n') % (readtype, type)) |
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113 raise QueryFailed('wrong response type') |
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114 |
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115 hdrfmt = common.resphdrfmts[type] |
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116 hdrsize = common.resphdrsizes[type] |
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117 try: |
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118 resphdr = struct.unpack(hdrfmt, cs.read(hdrsize)) |
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119 except struct.error: |
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120 raise QueryFailed('unable to retrieve query response headers') |
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122 return cs, resphdr |
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123 |
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124 def query(self, type, req): |
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125 self._connect() |
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127 self._send(type, req) |
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128 |
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129 return self._receive(type) |
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130 |
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131 @start_server |
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132 def statusquery(self, names, match, ignored, clean, unknown=True): |
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134 def genquery(): |
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135 for n in names: |
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136 yield n |
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137 states = 'almrx!' |
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138 if ignored: |
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139 raise ValueError('this is insanity') |
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140 if clean: |
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141 states += 'c' |
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142 if unknown: |
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143 states += '?' |
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144 yield states |
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145 |
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146 req = '\0'.join(genquery()) |
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148 cs, resphdr = self.query('STAT', req) |
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149 |
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150 def readnames(nbytes): |
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151 if nbytes: |
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152 names = cs.read(nbytes) |
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153 if names: |
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154 return filter(match, names.split('\0')) |
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155 return [] |
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156 results = tuple(map(readnames, resphdr[:-1])) |
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157 |
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158 if names: |
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159 nbytes = resphdr[-1] |
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160 vdirs = cs.read(nbytes) |
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161 if vdirs: |
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162 for vdir in vdirs.split('\0'): |
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163 match.dir(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') |