view hgext/inotify/__init__.py @ 13287:d0e0d3d43e14 stable

subrepo: compare svn subrepo state to last committed revision

A subversion project revisions are a subset of the repository revisions, you
can ask subversion to update a working directory from one revision to another
without changing anything. Unfortunately, Mercurial will think the
subrepository has changed and will commit it again. To avoid useless commits,
we compare the subrepository state to its actual "parent" revision. To ensure
ascending compatibility with existing subrepositories which might reference
fake revisions, we also keep comparing with the subrepo working directory
revision.

NOTE: not sure if this should go in stable or not.

# __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 version 2 or any later version.

'''accelerate status report using Linux's inotify service'''

# todo: socket permissions

from mercurial.i18n import _
import server
from client import client, QueryFailed

def serve(ui, repo, **opts):
    '''start an inotify server for this repository'''
    server.start(ui, repo.dirstate, repo.root, opts)

def debuginotify(ui, repo, **opts):
    '''debugging information for inotify extension

    Prints the list of directories being watched by the inotify server.
    '''
    cli = client(ui, repo)
    response = cli.debugquery()

    ui.write(_('directories being watched:\n'))
    for path in response:
        ui.write(('  %s/\n') % path)

def reposetup(ui, repo):
    if not hasattr(repo, 'dirstate'):
        return

    class inotifydirstate(repo.dirstate.__class__):

        # We'll set this to false after an unsuccessful attempt so that
        # next calls of status() within the same instance don't try again
        # to start an inotify server if it won't start.
        _inotifyon = True

        def status(self, match, subrepos, ignored, clean, unknown):
            files = match.files()
            if '.' in files:
                files = []
            if self._inotifyon and not ignored and not subrepos and not self._dirty:
                cli = client(ui, repo)
                try:
                    result = cli.statusquery(files, match, False,
                                            clean, unknown)
                except QueryFailed, instr:
                    ui.debug(str(instr))
                    # don't retry within the same hg instance
                    inotifydirstate._inotifyon = False
                    pass
                else:
                    if ui.config('inotify', 'debug'):
                        r2 = super(inotifydirstate, self).status(
                            match, [], False, clean, unknown)
                        for c, a, b in zip('LMARDUIC', result, r2):
                            for f in a:
                                if f not in b:
                                    ui.warn('*** inotify: %s +%s\n' % (c, f))
                            for f in b:
                                if f not in a:
                                    ui.warn('*** inotify: %s -%s\n' % (c, f))
                        result = r2
                    return result
            return super(inotifydirstate, self).status(
                match, subrepos, ignored, clean, unknown)

    repo.dirstate.__class__ = inotifydirstate

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