view hgext/inotify/__init__.py @ 6858:8f256bf98219

Add support for multiple possible bisect results (issue1228, issue1182)

The real reason for both issue is that bisect can not handle cases where there
are multiple possibilities for the result.

Example (from issue1228):
rev 0 -> good
rev 1 -> skipped
rev 2 -> skipped
rev 3 -> skipped
rev 4 -> bad

Note that this patch does not only fix the reported Assertion Error but also
the problem of a non converging bisect:

hg init
for i in `seq 3`; do echo $i > $i; hg add $i; hg ci -m$i; done
hg bisect -b 2
hg bisect -g 0
hg bisect -s

From this state on, you can:
 a) mark as bad forever (non converging!)
 b) mark as good to get an inconsistent state
 c) skip for the Assertion Error

Minor description and code edits by pmezard.

# __init__.py - inotify-based status acceleration for Linux
#
# Copyright 2006, 2007, 2008 Bryan O'Sullivan <[e-mail]>
# Copyright 2007, 2008 Brendan Cully <[e-mail]>
#
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.

'''inotify-based status acceleration for Linux systems
'''

# todo: socket permissions

from mercurial.i18n import gettext as _
from mercurial import cmdutil, util
import client, errno, os, server, socket
from weakref import proxy

def serve(ui, repo, **opts):
    '''start an inotify server for this repository'''
    timeout = opts.get('timeout')
    if timeout:
        timeout = float(timeout) * 1e3

    class service:
        def init(self):
            self.master = server.Master(ui, repo, timeout)

        def run(self):
            try:
                self.master.run()
            finally:
                self.master.shutdown()

    service = service()
    cmdutil.service(opts, initfn=service.init, runfn=service.run)

def reposetup(ui, repo):
    if not repo.local():
        return

    # XXX: weakref until hg stops relying on __del__
    repo = proxy(repo)

    class inotifydirstate(repo.dirstate.__class__):
        # Set to True if we're the inotify server, so we don't attempt
        # to recurse.
        inotifyserver = False

        def status(self, files, match, list_ignored, list_clean,
                   list_unknown=True):
            try:
                if not list_ignored and not self.inotifyserver:
                    result = client.query(ui, repo, files, match, False,
                                          list_clean, list_unknown)
                    if result is not None:
                        return result
            except socket.error, err:
                if err[0] == errno.ECONNREFUSED:
                    ui.warn(_('(found dead inotify server socket; '
                                   'removing it)\n'))
                    os.unlink(repo.join('inotify.sock'))
                elif err[0] != errno.ENOENT:
                    raise
                if ui.configbool('inotify', 'autostart'):
                    query = None
                    ui.debug(_('(starting inotify server)\n'))
                    try:
                        server.start(ui, repo)
                        query = client.query
                    except server.AlreadyStartedException, inst:
                        # another process may have started its own
                        # inotify server while this one was starting.
                        ui.debug(str(inst))
                        query = client.query
                    except Exception, inst:
                        ui.warn(_('could not start inotify server: '
                                       '%s\n') % inst)
                        ui.print_exc()

                    if query:
                        try:
                            return query(ui, repo, files or [], match,
                                         list_ignored, list_clean, list_unknown)
                        except socket.error, err:
                            ui.warn(_('could not talk to new inotify '
                                           'server: %s\n') % err[1])
                            ui.print_exc()

            return super(inotifydirstate, self).status(
                files, match or util.always, list_ignored, list_clean,
                list_unknown)

    repo.dirstate.__class__ = inotifydirstate

cmdtable = {
    '^inserve':
    (serve,
     [('d', 'daemon', None, _('run server in background')),
      ('', 'daemon-pipefds', '', _('used internally by daemon mode')),
      ('t', 'idle-timeout', '', _('minutes to sit idle before exiting')),
      ('', 'pid-file', '', _('name of file to write process ID to'))],
     _('hg inserve [OPT]...')),
    }