Mercurial > hg
view hgext/fsmonitor/state.py @ 29929:b3845cab4ddc
revset: wrap arguments of 'or' by 'list' node
This makes the number of 'or' arguments deterministic so we can attach
additional ordering flag to all operator nodes. See the next patch.
We rewrite the tree immediately after chained 'or' operations are flattened
by simplifyinfixops(), so we don't need to care if arguments are stored in
x[1] or x[1:].
author | Yuya Nishihara <yuya@tcha.org> |
---|---|
date | Sun, 07 Aug 2016 17:04:05 +0900 |
parents | a0939666b836 |
children | 29b35dac3b1f |
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# state.py - fsmonitor persistent state # # Copyright 2013-2016 Facebook, Inc. # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. from __future__ import absolute_import import errno import os import socket import struct from mercurial.i18n import _ from mercurial import pathutil _version = 4 _versionformat = ">I" class state(object): def __init__(self, repo): self._opener = repo.opener self._ui = repo.ui self._rootdir = pathutil.normasprefix(repo.root) self._lastclock = None self.mode = self._ui.config('fsmonitor', 'mode', default='on') self.walk_on_invalidate = self._ui.configbool( 'fsmonitor', 'walk_on_invalidate', False) self.timeout = float(self._ui.config( 'fsmonitor', 'timeout', default='2')) def get(self): try: file = self._opener('fsmonitor.state', 'rb') except IOError as inst: if inst.errno != errno.ENOENT: raise return None, None, None versionbytes = file.read(4) if len(versionbytes) < 4: self._ui.log( 'fsmonitor', 'fsmonitor: state file only has %d bytes, ' 'nuking state\n' % len(versionbytes)) self.invalidate() return None, None, None try: diskversion = struct.unpack(_versionformat, versionbytes)[0] if diskversion != _version: # different version, nuke state and start over self._ui.log( 'fsmonitor', 'fsmonitor: version switch from %d to ' '%d, nuking state\n' % (diskversion, _version)) self.invalidate() return None, None, None state = file.read().split('\0') # state = hostname\0clock\0ignorehash\0 + list of files, each # followed by a \0 diskhostname = state[0] hostname = socket.gethostname() if diskhostname != hostname: # file got moved to a different host self._ui.log('fsmonitor', 'fsmonitor: stored hostname "%s" ' 'different from current "%s", nuking state\n' % (diskhostname, hostname)) self.invalidate() return None, None, None clock = state[1] ignorehash = state[2] # discard the value after the last \0 notefiles = state[3:-1] finally: file.close() return clock, ignorehash, notefiles def set(self, clock, ignorehash, notefiles): if clock is None: self.invalidate() return try: file = self._opener('fsmonitor.state', 'wb') except (IOError, OSError): self._ui.warn(_("warning: unable to write out fsmonitor state\n")) return try: file.write(struct.pack(_versionformat, _version)) file.write(socket.gethostname() + '\0') file.write(clock + '\0') file.write(ignorehash + '\0') if notefiles: file.write('\0'.join(notefiles)) file.write('\0') finally: file.close() def invalidate(self): try: os.unlink(os.path.join(self._rootdir, '.hg', 'fsmonitor.state')) except OSError as inst: if inst.errno != errno.ENOENT: raise def setlastclock(self, clock): self._lastclock = clock def getlastclock(self): return self._lastclock