Mercurial > hg
view hgext/fsmonitor/state.py @ 32623:ed566a59f660
strip: also backup obsmarkers
We are about to give 'strip' the ability to remove obsmarkers. Before we start
removing data we must make sure it is preserved somewhere. So the backup bundle
created by 'strip' now contains obsmarkers.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Sat, 20 May 2017 15:06:10 +0200 |
parents | 15c998528c36 |
children | 1b25c648d5b7 |
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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._vfs = repo.vfs 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._vfs('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 if len(state) < 3: self._ui.log( 'fsmonitor', 'fsmonitor: state file truncated (expected ' '3 chunks, found %d), nuking state\n', len(state)) self.invalidate() return None, None, None 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._vfs('fsmonitor.state', 'wb', atomictemp=True) except (IOError, OSError): self._ui.warn(_("warning: unable to write out fsmonitor state\n")) return with file: 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') 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