fsmonitor: increase the threshold before we recommend it, when using rust

50k files works just fine with the rust status, and it's annoying to
get told "consider using fsmonitor" when we have another solution to
the status speed.

400k files was not chosen in any rigorous way. I know 200k files is
fine. Twice as many files should still be fine.

Differential Revision: https://phab.mercurial-scm.org/D9021

hgext/fsmonitor/__init__.py

@@ -1,984 +1,986 b''
 # __init__.py - fsmonitor initialization and overrides
 #
 # 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.
 
 '''Faster status operations with the Watchman file monitor (EXPERIMENTAL)
 
 Integrates the file-watching program Watchman with Mercurial to produce faster
 status results.
 
 On a particular Linux system, for a real-world repository with over 400,000
 files hosted on ext4, vanilla `hg status` takes 1.3 seconds. On the same
 system, with fsmonitor it takes about 0.3 seconds.
 
 fsmonitor requires no configuration -- it will tell Watchman about your
 repository as necessary. You'll need to install Watchman from
 https://facebook.github.io/watchman/ and make sure it is in your PATH.
 
 fsmonitor is incompatible with the largefiles and eol extensions, and
 will disable itself if any of those are active.
 
 The following configuration options exist:
 
 ::
 
     [fsmonitor]
     mode = {off, on, paranoid}
 
 When `mode = off`, fsmonitor will disable itself (similar to not loading the
 extension at all). When `mode = on`, fsmonitor will be enabled (the default).
 When `mode = paranoid`, fsmonitor will query both Watchman and the filesystem,
 and ensure that the results are consistent.
 
 ::
 
     [fsmonitor]
     timeout = (float)
 
 A value, in seconds, that determines how long fsmonitor will wait for Watchman
 to return results. Defaults to `2.0`.
 
 ::
 
     [fsmonitor]
     blacklistusers = (list of userids)
 
 A list of usernames for which fsmonitor will disable itself altogether.
 
 ::
 
     [fsmonitor]
     walk_on_invalidate = (boolean)
 
 Whether or not to walk the whole repo ourselves when our cached state has been
 invalidated, for example when Watchman has been restarted or .hgignore rules
 have been changed. Walking the repo in that case can result in competing for
 I/O with Watchman. For large repos it is recommended to set this value to
 false. You may wish to set this to true if you have a very fast filesystem
 that can outpace the IPC overhead of getting the result data for the full repo
 from Watchman. Defaults to false.
 
 ::
 
     [fsmonitor]
     warn_when_unused = (boolean)
 
 Whether to print a warning during certain operations when fsmonitor would be
 beneficial to performance but isn't enabled.
 
 ::
 
     [fsmonitor]
     warn_update_file_count = (integer)
+    # or when mercurial is built with rust support
+    warn_update_file_count_rust = (integer)
 
 If ``warn_when_unused`` is set and fsmonitor isn't enabled, a warning will
 be printed during working directory updates if this many files will be
 created.
 '''
 
 # Platforms Supported
 # ===================
 #
 # **Linux:** *Stable*. Watchman and fsmonitor are both known to work reliably,
 #   even under severe loads.
 #
 # **Mac OS X:** *Stable*. The Mercurial test suite passes with fsmonitor
 #   turned on, on case-insensitive HFS+. There has been a reasonable amount of
 #   user testing under normal loads.
 #
 # **Solaris, BSD:** *Alpha*. watchman and fsmonitor are believed to work, but
 #   very little testing has been done.
 #
 # **Windows:** *Alpha*. Not in a release version of watchman or fsmonitor yet.
 #
 # Known Issues
 # ============
 #
 # * fsmonitor will disable itself if any of the following extensions are
 #   enabled: largefiles, inotify, eol; or if the repository has subrepos.
 # * fsmonitor will produce incorrect results if nested repos that are not
 #   subrepos exist. *Workaround*: add nested repo paths to your `.hgignore`.
 #
 # The issues related to nested repos and subrepos are probably not fundamental
 # ones. Patches to fix them are welcome.
 
 from __future__ import absolute_import
 
 import codecs
 import os
 import stat
 import sys
 import tempfile
 import weakref
 
 from mercurial.i18n import _
 from mercurial.node import hex
 from mercurial.pycompat import open
 from mercurial import (
     context,
     encoding,
     error,
     extensions,
     localrepo,
     merge,
     pathutil,
     pycompat,
     registrar,
     scmutil,
     util,
 )
 from mercurial import match as matchmod
 from mercurial.utils import (
     hashutil,
     stringutil,
 )
 
 from . import (
     pywatchman,
     state,
     watchmanclient,
 )
 
 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
 # be specifying the version(s) of Mercurial they are tested with, or
 # leave the attribute unspecified.
 testedwith = b'ships-with-hg-core'
 
 configtable = {}
 configitem = registrar.configitem(configtable)
 
 configitem(
     b'fsmonitor', b'mode', default=b'on',
 )
 configitem(
     b'fsmonitor', b'walk_on_invalidate', default=False,
 )
 configitem(
     b'fsmonitor', b'timeout', default=b'2',
 )
 configitem(
     b'fsmonitor', b'blacklistusers', default=list,
 )
 configitem(
     b'fsmonitor', b'watchman_exe', default=b'watchman',
 )
 configitem(
     b'fsmonitor', b'verbose', default=True, experimental=True,
 )
 configitem(
     b'experimental', b'fsmonitor.transaction_notify', default=False,
 )
 
 # This extension is incompatible with the following blacklisted extensions
 # and will disable itself when encountering one of these:
 _blacklist = [b'largefiles', b'eol']
 
 
 def debuginstall(ui, fm):
     fm.write(
         b"fsmonitor-watchman",
         _(b"fsmonitor checking for watchman binary... (%s)\n"),
         ui.configpath(b"fsmonitor", b"watchman_exe"),
     )
     root = tempfile.mkdtemp()
     c = watchmanclient.client(ui, root)
     err = None
     try:
         v = c.command(b"version")
         fm.write(
             b"fsmonitor-watchman-version",
             _(b" watchman binary version %s\n"),
             pycompat.bytestr(v["version"]),
         )
     except watchmanclient.Unavailable as e:
         err = stringutil.forcebytestr(e)
     fm.condwrite(
         err,
         b"fsmonitor-watchman-error",
         _(b" watchman binary missing or broken: %s\n"),
         err,
     )
     return 1 if err else 0
 
 
 def _handleunavailable(ui, state, ex):
     """Exception handler for Watchman interaction exceptions"""
     if isinstance(ex, watchmanclient.Unavailable):
         # experimental config: fsmonitor.verbose
         if ex.warn and ui.configbool(b'fsmonitor', b'verbose'):
             if b'illegal_fstypes' not in stringutil.forcebytestr(ex):
                 ui.warn(stringutil.forcebytestr(ex) + b'\n')
         if ex.invalidate:
             state.invalidate()
         # experimental config: fsmonitor.verbose
         if ui.configbool(b'fsmonitor', b'verbose'):
             ui.log(
                 b'fsmonitor',
                 b'Watchman unavailable: %s\n',
                 stringutil.forcebytestr(ex.msg),
             )
     else:
         ui.log(
             b'fsmonitor',
             b'Watchman exception: %s\n',
             stringutil.forcebytestr(ex),
         )
 
 
 def _hashignore(ignore):
     """Calculate hash for ignore patterns and filenames
 
     If this information changes between Mercurial invocations, we can't
     rely on Watchman information anymore and have to re-scan the working
     copy.
 
     """
     sha1 = hashutil.sha1()
     sha1.update(pycompat.byterepr(ignore))
     return pycompat.sysbytes(sha1.hexdigest())
 
 
 _watchmanencoding = pywatchman.encoding.get_local_encoding()
 _fsencoding = sys.getfilesystemencoding() or sys.getdefaultencoding()
 _fixencoding = codecs.lookup(_watchmanencoding) != codecs.lookup(_fsencoding)
 
 
 def _watchmantofsencoding(path):
     """Fix path to match watchman and local filesystem encoding
 
     watchman's paths encoding can differ from filesystem encoding. For example,
     on Windows, it's always utf-8.
     """
     try:
         decoded = path.decode(_watchmanencoding)
     except UnicodeDecodeError as e:
         raise error.Abort(
             stringutil.forcebytestr(e), hint=b'watchman encoding error'
         )
 
     try:
         encoded = decoded.encode(_fsencoding, 'strict')
     except UnicodeEncodeError as e:
         raise error.Abort(stringutil.forcebytestr(e))
 
     return encoded
 
 
 def overridewalk(orig, self, match, subrepos, unknown, ignored, full=True):
     '''Replacement for dirstate.walk, hooking into Watchman.
 
     Whenever full is False, ignored is False, and the Watchman client is
     available, use Watchman combined with saved state to possibly return only a
     subset of files.'''
 
     def bail(reason):
         self._ui.debug(b'fsmonitor: fallback to core status, %s\n' % reason)
         return orig(match, subrepos, unknown, ignored, full=True)
 
     if full:
         return bail(b'full rewalk requested')
     if ignored:
         return bail(b'listing ignored files')
     if not self._watchmanclient.available():
         return bail(b'client unavailable')
     state = self._fsmonitorstate
     clock, ignorehash, notefiles = state.get()
     if not clock:
         if state.walk_on_invalidate:
             return bail(b'no clock')
         # Initial NULL clock value, see
         # https://facebook.github.io/watchman/docs/clockspec.html
         clock = b'c:0:0'
         notefiles = []
 
     ignore = self._ignore
     dirignore = self._dirignore
     if unknown:
         if _hashignore(ignore) != ignorehash and clock != b'c:0:0':
             # ignore list changed -- can't rely on Watchman state any more
             if state.walk_on_invalidate:
                 return bail(b'ignore rules changed')
             notefiles = []
             clock = b'c:0:0'
     else:
         # always ignore
         ignore = util.always
         dirignore = util.always
 
     matchfn = match.matchfn
     matchalways = match.always()
     dmap = self._map
     if util.safehasattr(dmap, b'_map'):
         # for better performance, directly access the inner dirstate map if the
         # standard dirstate implementation is in use.
         dmap = dmap._map
     nonnormalset = self._map.nonnormalset
 
     copymap = self._map.copymap
     getkind = stat.S_IFMT
     dirkind = stat.S_IFDIR
     regkind = stat.S_IFREG
     lnkkind = stat.S_IFLNK
     join = self._join
     normcase = util.normcase
     fresh_instance = False
 
     exact = skipstep3 = False
     if match.isexact():  # match.exact
         exact = True
         dirignore = util.always  # skip step 2
     elif match.prefix():  # match.match, no patterns
         skipstep3 = True
 
     if not exact and self._checkcase:
         # note that even though we could receive directory entries, we're only
         # interested in checking if a file with the same name exists. So only
         # normalize files if possible.
         normalize = self._normalizefile
         skipstep3 = False
     else:
         normalize = None
 
     # step 1: find all explicit files
     results, work, dirsnotfound = self._walkexplicit(match, subrepos)
 
     skipstep3 = skipstep3 and not (work or dirsnotfound)
     work = [d for d in work if not dirignore(d[0])]
 
     if not work and (exact or skipstep3):
         for s in subrepos:
             del results[s]
         del results[b'.hg']
         return results
 
     # step 2: query Watchman
     try:
         # Use the user-configured timeout for the query.
         # Add a little slack over the top of the user query to allow for
         # overheads while transferring the data
         self._watchmanclient.settimeout(state.timeout + 0.1)
         result = self._watchmanclient.command(
             b'query',
             {
                 b'fields': [b'mode', b'mtime', b'size', b'exists', b'name'],
                 b'since': clock,
                 b'expression': [
                     b'not',
                     [
                         b'anyof',
                         [b'dirname', b'.hg'],
                         [b'name', b'.hg', b'wholename'],
                     ],
                 ],
                 b'sync_timeout': int(state.timeout * 1000),
                 b'empty_on_fresh_instance': state.walk_on_invalidate,
             },
         )
     except Exception as ex:
         _handleunavailable(self._ui, state, ex)
         self._watchmanclient.clearconnection()
         return bail(b'exception during run')
     else:
         # We need to propagate the last observed clock up so that we
         # can use it for our next query
         state.setlastclock(pycompat.sysbytes(result[b'clock']))
         if result[b'is_fresh_instance']:
             if state.walk_on_invalidate:
                 state.invalidate()
                 return bail(b'fresh instance')
             fresh_instance = True
             # Ignore any prior noteable files from the state info
             notefiles = []
 
     # for file paths which require normalization and we encounter a case
     # collision, we store our own foldmap
     if normalize:
         foldmap = {normcase(k): k for k in results}
 
     switch_slashes = pycompat.ossep == b'\\'
     # The order of the results is, strictly speaking, undefined.
     # For case changes on a case insensitive filesystem we may receive
     # two entries, one with exists=True and another with exists=False.
     # The exists=True entries in the same response should be interpreted
     # as being happens-after the exists=False entries due to the way that
     # Watchman tracks files.  We use this property to reconcile deletes
     # for name case changes.
     for entry in result[b'files']:
         fname = entry[b'name']
 
         # Watchman always give us a str. Normalize to bytes on Python 3
         # using Watchman's encoding, if needed.
         if not isinstance(fname, bytes):
             fname = fname.encode(_watchmanencoding)
 
         if _fixencoding:
             fname = _watchmantofsencoding(fname)
 
         if switch_slashes:
             fname = fname.replace(b'\\', b'/')
         if normalize:
             normed = normcase(fname)
             fname = normalize(fname, True, True)
             foldmap[normed] = fname
         fmode = entry[b'mode']
         fexists = entry[b'exists']
         kind = getkind(fmode)
 
         if b'/.hg/' in fname or fname.endswith(b'/.hg'):
             return bail(b'nested-repo-detected')
 
         if not fexists:
             # if marked as deleted and we don't already have a change
             # record, mark it as deleted.  If we already have an entry
             # for fname then it was either part of walkexplicit or was
             # an earlier result that was a case change
             if (
                 fname not in results
                 and fname in dmap
                 and (matchalways or matchfn(fname))
             ):
                 results[fname] = None
         elif kind == dirkind:
             if fname in dmap and (matchalways or matchfn(fname)):
                 results[fname] = None
         elif kind == regkind or kind == lnkkind:
             if fname in dmap:
                 if matchalways or matchfn(fname):
                     results[fname] = entry
             elif (matchalways or matchfn(fname)) and not ignore(fname):
                 results[fname] = entry
         elif fname in dmap and (matchalways or matchfn(fname)):
             results[fname] = None
 
     # step 3: query notable files we don't already know about
     # XXX try not to iterate over the entire dmap
     if normalize:
         # any notable files that have changed case will already be handled
         # above, so just check membership in the foldmap
         notefiles = {
             normalize(f, True, True)
             for f in notefiles
             if normcase(f) not in foldmap
         }
     visit = {
         f
         for f in notefiles
         if (f not in results and matchfn(f) and (f in dmap or not ignore(f)))
     }
 
     if not fresh_instance:
         if matchalways:
             visit.update(f for f in nonnormalset if f not in results)
             visit.update(f for f in copymap if f not in results)
         else:
             visit.update(
                 f for f in nonnormalset if f not in results and matchfn(f)
             )
             visit.update(f for f in copymap if f not in results and matchfn(f))
     else:
         if matchalways:
             visit.update(
                 f for f, st in pycompat.iteritems(dmap) if f not in results
             )
             visit.update(f for f in copymap if f not in results)
         else:
             visit.update(
                 f
                 for f, st in pycompat.iteritems(dmap)
                 if f not in results and matchfn(f)
             )
             visit.update(f for f in copymap if f not in results and matchfn(f))
 
     audit = pathutil.pathauditor(self._root, cached=True).check
     auditpass = [f for f in visit if audit(f)]
     auditpass.sort()
     auditfail = visit.difference(auditpass)
     for f in auditfail:
         results[f] = None
 
     nf = iter(auditpass)
     for st in util.statfiles([join(f) for f in auditpass]):
         f = next(nf)
         if st or f in dmap:
             results[f] = st
 
     for s in subrepos:
         del results[s]
     del results[b'.hg']
     return results
 
 
 def overridestatus(
     orig,
     self,
     node1=b'.',
     node2=None,
     match=None,
     ignored=False,
     clean=False,
     unknown=False,
     listsubrepos=False,
 ):
     listignored = ignored
     listclean = clean
     listunknown = unknown
 
     def _cmpsets(l1, l2):
         try:
             if b'FSMONITOR_LOG_FILE' in encoding.environ:
                 fn = encoding.environ[b'FSMONITOR_LOG_FILE']
                 f = open(fn, b'wb')
             else:
                 fn = b'fsmonitorfail.log'
                 f = self.vfs.open(fn, b'wb')
         except (IOError, OSError):
             self.ui.warn(_(b'warning: unable to write to %s\n') % fn)
             return
 
         try:
             for i, (s1, s2) in enumerate(zip(l1, l2)):
                 if set(s1) != set(s2):
                     f.write(b'sets at position %d are unequal\n' % i)
                     f.write(b'watchman returned: %s\n' % s1)
                     f.write(b'stat returned: %s\n' % s2)
         finally:
             f.close()
 
     if isinstance(node1, context.changectx):
         ctx1 = node1
     else:
         ctx1 = self[node1]
     if isinstance(node2, context.changectx):
         ctx2 = node2
     else:
         ctx2 = self[node2]
 
     working = ctx2.rev() is None
     parentworking = working and ctx1 == self[b'.']
     match = match or matchmod.always()
 
     # Maybe we can use this opportunity to update Watchman's state.
     # Mercurial uses workingcommitctx and/or memctx to represent the part of
     # the workingctx that is to be committed. So don't update the state in
     # that case.
     # HG_PENDING is set in the environment when the dirstate is being updated
     # in the middle of a transaction; we must not update our state in that
     # case, or we risk forgetting about changes in the working copy.
     updatestate = (
         parentworking
         and match.always()
         and not isinstance(ctx2, (context.workingcommitctx, context.memctx))
         and b'HG_PENDING' not in encoding.environ
     )
 
     try:
         if self._fsmonitorstate.walk_on_invalidate:
             # Use a short timeout to query the current clock.  If that
             # takes too long then we assume that the service will be slow
             # to answer our query.
             # walk_on_invalidate indicates that we prefer to walk the
             # tree ourselves because we can ignore portions that Watchman
             # cannot and we tend to be faster in the warmer buffer cache
             # cases.
             self._watchmanclient.settimeout(0.1)
         else:
             # Give Watchman more time to potentially complete its walk
             # and return the initial clock.  In this mode we assume that
             # the filesystem will be slower than parsing a potentially
             # very large Watchman result set.
             self._watchmanclient.settimeout(self._fsmonitorstate.timeout + 0.1)
         startclock = self._watchmanclient.getcurrentclock()
     except Exception as ex:
         self._watchmanclient.clearconnection()
         _handleunavailable(self.ui, self._fsmonitorstate, ex)
         # boo, Watchman failed. bail
         return orig(
             node1,
             node2,
             match,
             listignored,
             listclean,
             listunknown,
             listsubrepos,
         )
 
     if updatestate:
         # We need info about unknown files. This may make things slower the
         # first time, but whatever.
         stateunknown = True
     else:
         stateunknown = listunknown
 
     if updatestate:
         ps = poststatus(startclock)
         self.addpostdsstatus(ps)
 
     r = orig(
         node1, node2, match, listignored, listclean, stateunknown, listsubrepos
     )
     modified, added, removed, deleted, unknown, ignored, clean = r
 
     if not listunknown:
         unknown = []
 
     # don't do paranoid checks if we're not going to query Watchman anyway
     full = listclean or match.traversedir is not None
     if self._fsmonitorstate.mode == b'paranoid' and not full:
         # run status again and fall back to the old walk this time
         self.dirstate._fsmonitordisable = True
 
         # shut the UI up
         quiet = self.ui.quiet
         self.ui.quiet = True
         fout, ferr = self.ui.fout, self.ui.ferr
         self.ui.fout = self.ui.ferr = open(os.devnull, b'wb')
 
         try:
             rv2 = orig(
                 node1,
                 node2,
                 match,
                 listignored,
                 listclean,
                 listunknown,
                 listsubrepos,
             )
         finally:
             self.dirstate._fsmonitordisable = False
             self.ui.quiet = quiet
             self.ui.fout, self.ui.ferr = fout, ferr
 
         # clean isn't tested since it's set to True above
         with self.wlock():
             _cmpsets(
                 [modified, added, removed, deleted, unknown, ignored, clean],
                 rv2,
             )
         modified, added, removed, deleted, unknown, ignored, clean = rv2
 
     return scmutil.status(
         modified, added, removed, deleted, unknown, ignored, clean
     )
 
 
 class poststatus(object):
     def __init__(self, startclock):
         self._startclock = pycompat.sysbytes(startclock)
 
     def __call__(self, wctx, status):
         clock = wctx.repo()._fsmonitorstate.getlastclock() or self._startclock
         hashignore = _hashignore(wctx.repo().dirstate._ignore)
         notefiles = (
             status.modified
             + status.added
             + status.removed
             + status.deleted
             + status.unknown
         )
         wctx.repo()._fsmonitorstate.set(clock, hashignore, notefiles)
 
 
 def makedirstate(repo, dirstate):
     class fsmonitordirstate(dirstate.__class__):
         def _fsmonitorinit(self, repo):
             # _fsmonitordisable is used in paranoid mode
             self._fsmonitordisable = False
             self._fsmonitorstate = repo._fsmonitorstate
             self._watchmanclient = repo._watchmanclient
             self._repo = weakref.proxy(repo)
 
         def walk(self, *args, **kwargs):
             orig = super(fsmonitordirstate, self).walk
             if self._fsmonitordisable:
                 return orig(*args, **kwargs)
             return overridewalk(orig, self, *args, **kwargs)
 
         def rebuild(self, *args, **kwargs):
             self._fsmonitorstate.invalidate()
             return super(fsmonitordirstate, self).rebuild(*args, **kwargs)
 
         def invalidate(self, *args, **kwargs):
             self._fsmonitorstate.invalidate()
             return super(fsmonitordirstate, self).invalidate(*args, **kwargs)
 
     dirstate.__class__ = fsmonitordirstate
     dirstate._fsmonitorinit(repo)
 
 
 def wrapdirstate(orig, self):
     ds = orig(self)
     # only override the dirstate when Watchman is available for the repo
     if util.safehasattr(self, b'_fsmonitorstate'):
         makedirstate(self, ds)
     return ds
 
 
 def extsetup(ui):
     extensions.wrapfilecache(
         localrepo.localrepository, b'dirstate', wrapdirstate
     )
     if pycompat.isdarwin:
         # An assist for avoiding the dangling-symlink fsevents bug
         extensions.wrapfunction(os, b'symlink', wrapsymlink)
 
     extensions.wrapfunction(merge, b'update', wrapupdate)
 
 
 def wrapsymlink(orig, source, link_name):
     ''' if we create a dangling symlink, also touch the parent dir
     to encourage fsevents notifications to work more correctly '''
     try:
         return orig(source, link_name)
     finally:
         try:
             os.utime(os.path.dirname(link_name), None)
         except OSError:
             pass
 
 
 class state_update(object):
     ''' This context manager is responsible for dispatching the state-enter
         and state-leave signals to the watchman service. The enter and leave
         methods can be invoked manually (for scenarios where context manager
         semantics are not possible). If parameters oldnode and newnode are None,
         they will be populated based on current working copy in enter and
         leave, respectively. Similarly, if the distance is none, it will be
         calculated based on the oldnode and newnode in the leave method.'''
 
     def __init__(
         self,
         repo,
         name,
         oldnode=None,
         newnode=None,
         distance=None,
         partial=False,
     ):
         self.repo = repo.unfiltered()
         self.name = name
         self.oldnode = oldnode
         self.newnode = newnode
         self.distance = distance
         self.partial = partial
         self._lock = None
         self.need_leave = False
 
     def __enter__(self):
         self.enter()
 
     def enter(self):
         # Make sure we have a wlock prior to sending notifications to watchman.
         # We don't want to race with other actors. In the update case,
         # merge.update is going to take the wlock almost immediately. We are
         # effectively extending the lock around several short sanity checks.
         if self.oldnode is None:
             self.oldnode = self.repo[b'.'].node()
 
         if self.repo.currentwlock() is None:
             if util.safehasattr(self.repo, b'wlocknostateupdate'):
                 self._lock = self.repo.wlocknostateupdate()
             else:
                 self._lock = self.repo.wlock()
         self.need_leave = self._state(b'state-enter', hex(self.oldnode))
         return self
 
     def __exit__(self, type_, value, tb):
         abort = True if type_ else False
         self.exit(abort=abort)
 
     def exit(self, abort=False):
         try:
             if self.need_leave:
                 status = b'failed' if abort else b'ok'
                 if self.newnode is None:
                     self.newnode = self.repo[b'.'].node()
                 if self.distance is None:
                     self.distance = calcdistance(
                         self.repo, self.oldnode, self.newnode
                     )
                 self._state(b'state-leave', hex(self.newnode), status=status)
         finally:
             self.need_leave = False
             if self._lock:
                 self._lock.release()
 
     def _state(self, cmd, commithash, status=b'ok'):
         if not util.safehasattr(self.repo, b'_watchmanclient'):
             return False
         try:
             self.repo._watchmanclient.command(
                 cmd,
                 {
                     b'name': self.name,
                     b'metadata': {
                         # the target revision
                         b'rev': commithash,
                         # approximate number of commits between current and target
                         b'distance': self.distance if self.distance else 0,
                         # success/failure (only really meaningful for state-leave)
                         b'status': status,
                         # whether the working copy parent is changing
                         b'partial': self.partial,
                     },
                 },
             )
             return True
         except Exception as e:
             # Swallow any errors; fire and forget
             self.repo.ui.log(
                 b'watchman', b'Exception %s while running %s\n', e, cmd
             )
             return False
 
 
 # Estimate the distance between two nodes
 def calcdistance(repo, oldnode, newnode):
     anc = repo.changelog.ancestor(oldnode, newnode)
     ancrev = repo[anc].rev()
     distance = abs(repo[oldnode].rev() - ancrev) + abs(
         repo[newnode].rev() - ancrev
     )
     return distance
 
 
 # Bracket working copy updates with calls to the watchman state-enter
 # and state-leave commands.  This allows clients to perform more intelligent
 # settling during bulk file change scenarios
 # https://facebook.github.io/watchman/docs/cmd/subscribe.html#advanced-settling
 def wrapupdate(
     orig,
     repo,
     node,
     branchmerge,
     force,
     ancestor=None,
     mergeancestor=False,
     labels=None,
     matcher=None,
     **kwargs
 ):
 
     distance = 0
     partial = True
     oldnode = repo[b'.'].node()
     newnode = repo[node].node()
     if matcher is None or matcher.always():
         partial = False
         distance = calcdistance(repo.unfiltered(), oldnode, newnode)
 
     with state_update(
         repo,
         name=b"hg.update",
         oldnode=oldnode,
         newnode=newnode,
         distance=distance,
         partial=partial,
     ):
         return orig(
             repo,
             node,
             branchmerge,
             force,
             ancestor,
             mergeancestor,
             labels,
             matcher,
             **kwargs
         )
 
 
 def repo_has_depth_one_nested_repo(repo):
     for f in repo.wvfs.listdir():
         if os.path.isdir(os.path.join(repo.root, f, b'.hg')):
             msg = b'fsmonitor: sub-repository %r detected, fsmonitor disabled\n'
             repo.ui.debug(msg % f)
             return True
     return False
 
 
 def reposetup(ui, repo):
     # We don't work with largefiles or inotify
     exts = extensions.enabled()
     for ext in _blacklist:
         if ext in exts:
             ui.warn(
                 _(
                     b'The fsmonitor extension is incompatible with the %s '
                     b'extension and has been disabled.\n'
                 )
                 % ext
             )
             return
 
     if repo.local():
         # We don't work with subrepos either.
         #
         # if repo[None].substate can cause a dirstate parse, which is too
         # slow. Instead, look for a file called hgsubstate,
         if repo.wvfs.exists(b'.hgsubstate') or repo.wvfs.exists(b'.hgsub'):
             return
 
         if repo_has_depth_one_nested_repo(repo):
             return
 
         fsmonitorstate = state.state(repo)
         if fsmonitorstate.mode == b'off':
             return
 
         try:
             client = watchmanclient.client(repo.ui, repo.root)
         except Exception as ex:
             _handleunavailable(ui, fsmonitorstate, ex)
             return
 
         repo._fsmonitorstate = fsmonitorstate
         repo._watchmanclient = client
 
         dirstate, cached = localrepo.isfilecached(repo, b'dirstate')
         if cached:
             # at this point since fsmonitorstate wasn't present,
             # repo.dirstate is not a fsmonitordirstate
             makedirstate(repo, dirstate)
 
         class fsmonitorrepo(repo.__class__):
             def status(self, *args, **kwargs):
                 orig = super(fsmonitorrepo, self).status
                 return overridestatus(orig, self, *args, **kwargs)
 
             def wlocknostateupdate(self, *args, **kwargs):
                 return super(fsmonitorrepo, self).wlock(*args, **kwargs)
 
             def wlock(self, *args, **kwargs):
                 l = super(fsmonitorrepo, self).wlock(*args, **kwargs)
                 if not ui.configbool(
                     b"experimental", b"fsmonitor.transaction_notify"
                 ):
                     return l
                 if l.held != 1:
                     return l
                 origrelease = l.releasefn
 
                 def staterelease():
                     if origrelease:
                         origrelease()
                     if l.stateupdate:
                         l.stateupdate.exit()
                         l.stateupdate = None
 
                 try:
                     l.stateupdate = None
                     l.stateupdate = state_update(self, name=b"hg.transaction")
                     l.stateupdate.enter()
                     l.releasefn = staterelease
                 except Exception as e:
                     # Swallow any errors; fire and forget
                     self.ui.log(
                         b'watchman', b'Exception in state update %s\n', e
                     )
                 return l
 
         repo.__class__ = fsmonitorrepo

mercurial/configitems.py

@@ -1,1585 +1,1588 b''
 # configitems.py - centralized declaration of configuration option
 #
 #  Copyright 2017 Pierre-Yves David <[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.
 
 from __future__ import absolute_import
 
 import functools
 import re
 
 from . import (
     encoding,
     error,
 )
 
 
 def loadconfigtable(ui, extname, configtable):
     """update config item known to the ui with the extension ones"""
     for section, items in sorted(configtable.items()):
         knownitems = ui._knownconfig.setdefault(section, itemregister())
         knownkeys = set(knownitems)
         newkeys = set(items)
         for key in sorted(knownkeys & newkeys):
             msg = b"extension '%s' overwrite config item '%s.%s'"
             msg %= (extname, section, key)
             ui.develwarn(msg, config=b'warn-config')
 
         knownitems.update(items)
 
 
 class configitem(object):
     """represent a known config item
 
     :section: the official config section where to find this item,
        :name: the official name within the section,
     :default: default value for this item,
     :alias: optional list of tuples as alternatives,
     :generic: this is a generic definition, match name using regular expression.
     """
 
     def __init__(
         self,
         section,
         name,
         default=None,
         alias=(),
         generic=False,
         priority=0,
         experimental=False,
     ):
         self.section = section
         self.name = name
         self.default = default
         self.alias = list(alias)
         self.generic = generic
         self.priority = priority
         self.experimental = experimental
         self._re = None
         if generic:
             self._re = re.compile(self.name)
 
 
 class itemregister(dict):
     """A specialized dictionary that can handle wild-card selection"""
 
     def __init__(self):
         super(itemregister, self).__init__()
         self._generics = set()
 
     def update(self, other):
         super(itemregister, self).update(other)
         self._generics.update(other._generics)
 
     def __setitem__(self, key, item):
         super(itemregister, self).__setitem__(key, item)
         if item.generic:
             self._generics.add(item)
 
     def get(self, key):
         baseitem = super(itemregister, self).get(key)
         if baseitem is not None and not baseitem.generic:
             return baseitem
 
         # search for a matching generic item
         generics = sorted(self._generics, key=(lambda x: (x.priority, x.name)))
         for item in generics:
             # we use 'match' instead of 'search' to make the matching simpler
             # for people unfamiliar with regular expression. Having the match
             # rooted to the start of the string will produce less surprising
             # result for user writing simple regex for sub-attribute.
             #
             # For example using "color\..*" match produces an unsurprising
             # result, while using search could suddenly match apparently
             # unrelated configuration that happens to contains "color."
             # anywhere. This is a tradeoff where we favor requiring ".*" on
             # some match to avoid the need to prefix most pattern with "^".
             # The "^" seems more error prone.
             if item._re.match(key):
                 return item
 
         return None
 
 
 coreitems = {}
 
 
 def _register(configtable, *args, **kwargs):
     item = configitem(*args, **kwargs)
     section = configtable.setdefault(item.section, itemregister())
     if item.name in section:
         msg = b"duplicated config item registration for '%s.%s'"
         raise error.ProgrammingError(msg % (item.section, item.name))
     section[item.name] = item
 
 
 # special value for case where the default is derived from other values
 dynamicdefault = object()
 
 # Registering actual config items
 
 
 def getitemregister(configtable):
     f = functools.partial(_register, configtable)
     # export pseudo enum as configitem.*
     f.dynamicdefault = dynamicdefault
     return f
 
 
 coreconfigitem = getitemregister(coreitems)
 
 
 def _registerdiffopts(section, configprefix=b''):
     coreconfigitem(
         section, configprefix + b'nodates', default=False,
     )
     coreconfigitem(
         section, configprefix + b'showfunc', default=False,
     )
     coreconfigitem(
         section, configprefix + b'unified', default=None,
     )
     coreconfigitem(
         section, configprefix + b'git', default=False,
     )
     coreconfigitem(
         section, configprefix + b'ignorews', default=False,
     )
     coreconfigitem(
         section, configprefix + b'ignorewsamount', default=False,
     )
     coreconfigitem(
         section, configprefix + b'ignoreblanklines', default=False,
     )
     coreconfigitem(
         section, configprefix + b'ignorewseol', default=False,
     )
     coreconfigitem(
         section, configprefix + b'nobinary', default=False,
     )
     coreconfigitem(
         section, configprefix + b'noprefix', default=False,
     )
     coreconfigitem(
         section, configprefix + b'word-diff', default=False,
     )
 
 
 coreconfigitem(
     b'alias', b'.*', default=dynamicdefault, generic=True,
 )
 coreconfigitem(
     b'auth', b'cookiefile', default=None,
 )
 _registerdiffopts(section=b'annotate')
 # bookmarks.pushing: internal hack for discovery
 coreconfigitem(
     b'bookmarks', b'pushing', default=list,
 )
 # bundle.mainreporoot: internal hack for bundlerepo
 coreconfigitem(
     b'bundle', b'mainreporoot', default=b'',
 )
 coreconfigitem(
     b'censor', b'policy', default=b'abort', experimental=True,
 )
 coreconfigitem(
     b'chgserver', b'idletimeout', default=3600,
 )
 coreconfigitem(
     b'chgserver', b'skiphash', default=False,
 )
 coreconfigitem(
     b'cmdserver', b'log', default=None,
 )
 coreconfigitem(
     b'cmdserver', b'max-log-files', default=7,
 )
 coreconfigitem(
     b'cmdserver', b'max-log-size', default=b'1 MB',
 )
 coreconfigitem(
     b'cmdserver', b'max-repo-cache', default=0, experimental=True,
 )
 coreconfigitem(
     b'cmdserver', b'message-encodings', default=list,
 )
 coreconfigitem(
     b'cmdserver',
     b'track-log',
     default=lambda: [b'chgserver', b'cmdserver', b'repocache'],
 )
 coreconfigitem(
     b'cmdserver', b'shutdown-on-interrupt', default=True,
 )
 coreconfigitem(
     b'color', b'.*', default=None, generic=True,
 )
 coreconfigitem(
     b'color', b'mode', default=b'auto',
 )
 coreconfigitem(
     b'color', b'pagermode', default=dynamicdefault,
 )
 _registerdiffopts(section=b'commands', configprefix=b'commit.interactive.')
 coreconfigitem(
     b'commands', b'commit.post-status', default=False,
 )
 coreconfigitem(
     b'commands', b'grep.all-files', default=False, experimental=True,
 )
 coreconfigitem(
     b'commands', b'merge.require-rev', default=False,
 )
 coreconfigitem(
     b'commands', b'push.require-revs', default=False,
 )
 coreconfigitem(
     b'commands', b'resolve.confirm', default=False,
 )
 coreconfigitem(
     b'commands', b'resolve.explicit-re-merge', default=False,
 )
 coreconfigitem(
     b'commands', b'resolve.mark-check', default=b'none',
 )
 _registerdiffopts(section=b'commands', configprefix=b'revert.interactive.')
 coreconfigitem(
     b'commands', b'show.aliasprefix', default=list,
 )
 coreconfigitem(
     b'commands', b'status.relative', default=False,
 )
 coreconfigitem(
     b'commands', b'status.skipstates', default=[], experimental=True,
 )
 coreconfigitem(
     b'commands', b'status.terse', default=b'',
 )
 coreconfigitem(
     b'commands', b'status.verbose', default=False,
 )
 coreconfigitem(
     b'commands', b'update.check', default=None,
 )
 coreconfigitem(
     b'commands', b'update.requiredest', default=False,
 )
 coreconfigitem(
     b'committemplate', b'.*', default=None, generic=True,
 )
 coreconfigitem(
     b'convert', b'bzr.saverev', default=True,
 )
 coreconfigitem(
     b'convert', b'cvsps.cache', default=True,
 )
 coreconfigitem(
     b'convert', b'cvsps.fuzz', default=60,
 )
 coreconfigitem(
     b'convert', b'cvsps.logencoding', default=None,
 )
 coreconfigitem(
     b'convert', b'cvsps.mergefrom', default=None,
 )
 coreconfigitem(
     b'convert', b'cvsps.mergeto', default=None,
 )
 coreconfigitem(
     b'convert', b'git.committeractions', default=lambda: [b'messagedifferent'],
 )
 coreconfigitem(
     b'convert', b'git.extrakeys', default=list,
 )
 coreconfigitem(
     b'convert', b'git.findcopiesharder', default=False,
 )
 coreconfigitem(
     b'convert', b'git.remoteprefix', default=b'remote',
 )
 coreconfigitem(
     b'convert', b'git.renamelimit', default=400,
 )
 coreconfigitem(
     b'convert', b'git.saverev', default=True,
 )
 coreconfigitem(
     b'convert', b'git.similarity', default=50,
 )
 coreconfigitem(
     b'convert', b'git.skipsubmodules', default=False,
 )
 coreconfigitem(
     b'convert', b'hg.clonebranches', default=False,
 )
 coreconfigitem(
     b'convert', b'hg.ignoreerrors', default=False,
 )
 coreconfigitem(
     b'convert', b'hg.preserve-hash', default=False,
 )
 coreconfigitem(
     b'convert', b'hg.revs', default=None,
 )
 coreconfigitem(
     b'convert', b'hg.saverev', default=False,
 )
 coreconfigitem(
     b'convert', b'hg.sourcename', default=None,
 )
 coreconfigitem(
     b'convert', b'hg.startrev', default=None,
 )
 coreconfigitem(
     b'convert', b'hg.tagsbranch', default=b'default',
 )
 coreconfigitem(
     b'convert', b'hg.usebranchnames', default=True,
 )
 coreconfigitem(
     b'convert', b'ignoreancestorcheck', default=False, experimental=True,
 )
 coreconfigitem(
     b'convert', b'localtimezone', default=False,
 )
 coreconfigitem(
     b'convert', b'p4.encoding', default=dynamicdefault,
 )
 coreconfigitem(
     b'convert', b'p4.startrev', default=0,
 )
 coreconfigitem(
     b'convert', b'skiptags', default=False,
 )
 coreconfigitem(
     b'convert', b'svn.debugsvnlog', default=True,
 )
 coreconfigitem(
     b'convert', b'svn.trunk', default=None,
 )
 coreconfigitem(
     b'convert', b'svn.tags', default=None,
 )
 coreconfigitem(
     b'convert', b'svn.branches', default=None,
 )
 coreconfigitem(
     b'convert', b'svn.startrev', default=0,
 )
 coreconfigitem(
     b'debug', b'dirstate.delaywrite', default=0,
 )
 coreconfigitem(
     b'defaults', b'.*', default=None, generic=True,
 )
 coreconfigitem(
     b'devel', b'all-warnings', default=False,
 )
 coreconfigitem(
     b'devel', b'bundle2.debug', default=False,
 )
 coreconfigitem(
     b'devel', b'bundle.delta', default=b'',
 )
 coreconfigitem(
     b'devel', b'cache-vfs', default=None,
 )
 coreconfigitem(
     b'devel', b'check-locks', default=False,
 )
 coreconfigitem(
     b'devel', b'check-relroot', default=False,
 )
 coreconfigitem(
     b'devel', b'default-date', default=None,
 )
 coreconfigitem(
     b'devel', b'deprec-warn', default=False,
 )
 coreconfigitem(
     b'devel', b'disableloaddefaultcerts', default=False,
 )
 coreconfigitem(
     b'devel', b'warn-empty-changegroup', default=False,
 )
 coreconfigitem(
     b'devel', b'legacy.exchange', default=list,
 )
 coreconfigitem(
     b'devel', b'persistent-nodemap', default=False,
 )
 coreconfigitem(
     b'devel', b'servercafile', default=b'',
 )
 coreconfigitem(
     b'devel', b'serverexactprotocol', default=b'',
 )
 coreconfigitem(
     b'devel', b'serverrequirecert', default=False,
 )
 coreconfigitem(
     b'devel', b'strip-obsmarkers', default=True,
 )
 coreconfigitem(
     b'devel', b'warn-config', default=None,
 )
 coreconfigitem(
     b'devel', b'warn-config-default', default=None,
 )
 coreconfigitem(
     b'devel', b'user.obsmarker', default=None,
 )
 coreconfigitem(
     b'devel', b'warn-config-unknown', default=None,
 )
 coreconfigitem(
     b'devel', b'debug.copies', default=False,
 )
 coreconfigitem(
     b'devel', b'debug.extensions', default=False,
 )
 coreconfigitem(
     b'devel', b'debug.repo-filters', default=False,
 )
 coreconfigitem(
     b'devel', b'debug.peer-request', default=False,
 )
 coreconfigitem(
     b'devel', b'discovery.randomize', default=True,
 )
 _registerdiffopts(section=b'diff')
 coreconfigitem(
     b'email', b'bcc', default=None,
 )
 coreconfigitem(
     b'email', b'cc', default=None,
 )
 coreconfigitem(
     b'email', b'charsets', default=list,
 )
 coreconfigitem(
     b'email', b'from', default=None,
 )
 coreconfigitem(
     b'email', b'method', default=b'smtp',
 )
 coreconfigitem(
     b'email', b'reply-to', default=None,
 )
 coreconfigitem(
     b'email', b'to', default=None,
 )
 coreconfigitem(
     b'experimental', b'archivemetatemplate', default=dynamicdefault,
 )
 coreconfigitem(
     b'experimental', b'auto-publish', default=b'publish',
 )
 coreconfigitem(
     b'experimental', b'bundle-phases', default=False,
 )
 coreconfigitem(
     b'experimental', b'bundle2-advertise', default=True,
 )
 coreconfigitem(
     b'experimental', b'bundle2-output-capture', default=False,
 )
 coreconfigitem(
     b'experimental', b'bundle2.pushback', default=False,
 )
 coreconfigitem(
     b'experimental', b'bundle2lazylocking', default=False,
 )
 coreconfigitem(
     b'experimental', b'bundlecomplevel', default=None,
 )
 coreconfigitem(
     b'experimental', b'bundlecomplevel.bzip2', default=None,
 )
 coreconfigitem(
     b'experimental', b'bundlecomplevel.gzip', default=None,
 )
 coreconfigitem(
     b'experimental', b'bundlecomplevel.none', default=None,
 )
 coreconfigitem(
     b'experimental', b'bundlecomplevel.zstd', default=None,
 )
 coreconfigitem(
     b'experimental', b'changegroup3', default=False,
 )
 coreconfigitem(
     b'experimental', b'cleanup-as-archived', default=False,
 )
 coreconfigitem(
     b'experimental', b'clientcompressionengines', default=list,
 )
 coreconfigitem(
     b'experimental', b'copytrace', default=b'on',
 )
 coreconfigitem(
     b'experimental', b'copytrace.movecandidateslimit', default=100,
 )
 coreconfigitem(
     b'experimental', b'copytrace.sourcecommitlimit', default=100,
 )
 coreconfigitem(
     b'experimental', b'copies.read-from', default=b"filelog-only",
 )
 coreconfigitem(
     b'experimental', b'copies.write-to', default=b'filelog-only',
 )
 coreconfigitem(
     b'experimental', b'crecordtest', default=None,
 )
 coreconfigitem(
     b'experimental', b'directaccess', default=False,
 )
 coreconfigitem(
     b'experimental', b'directaccess.revnums', default=False,
 )
 coreconfigitem(
     b'experimental', b'editortmpinhg', default=False,
 )
 coreconfigitem(
     b'experimental', b'evolution', default=list,
 )
 coreconfigitem(
     b'experimental',
     b'evolution.allowdivergence',
     default=False,
     alias=[(b'experimental', b'allowdivergence')],
 )
 coreconfigitem(
     b'experimental', b'evolution.allowunstable', default=None,
 )
 coreconfigitem(
     b'experimental', b'evolution.createmarkers', default=None,
 )
 coreconfigitem(
     b'experimental',
     b'evolution.effect-flags',
     default=True,
     alias=[(b'experimental', b'effect-flags')],
 )
 coreconfigitem(
     b'experimental', b'evolution.exchange', default=None,
 )
 coreconfigitem(
     b'experimental', b'evolution.bundle-obsmarker', default=False,
 )
 coreconfigitem(
     b'experimental', b'log.topo', default=False,
 )
 coreconfigitem(
     b'experimental', b'evolution.report-instabilities', default=True,
 )
 coreconfigitem(
     b'experimental', b'evolution.track-operation', default=True,
 )
 # repo-level config to exclude a revset visibility
 #
 # The target use case is to use `share` to expose different subset of the same
 # repository, especially server side. See also `server.view`.
 coreconfigitem(
     b'experimental', b'extra-filter-revs', default=None,
 )
 coreconfigitem(
     b'experimental', b'maxdeltachainspan', default=-1,
 )
 coreconfigitem(
     b'experimental', b'mergetempdirprefix', default=None,
 )
 coreconfigitem(
     b'experimental', b'mmapindexthreshold', default=None,
 )
 coreconfigitem(
     b'experimental', b'narrow', default=False,
 )
 coreconfigitem(
     b'experimental', b'nonnormalparanoidcheck', default=False,
 )
 coreconfigitem(
     b'experimental', b'exportableenviron', default=list,
 )
 coreconfigitem(
     b'experimental', b'extendedheader.index', default=None,
 )
 coreconfigitem(
     b'experimental', b'extendedheader.similarity', default=False,
 )
 coreconfigitem(
     b'experimental', b'graphshorten', default=False,
 )
 coreconfigitem(
     b'experimental', b'graphstyle.parent', default=dynamicdefault,
 )
 coreconfigitem(
     b'experimental', b'graphstyle.missing', default=dynamicdefault,
 )
 coreconfigitem(
     b'experimental', b'graphstyle.grandparent', default=dynamicdefault,
 )
 coreconfigitem(
     b'experimental', b'hook-track-tags', default=False,
 )
 coreconfigitem(
     b'experimental', b'httppeer.advertise-v2', default=False,
 )
 coreconfigitem(
     b'experimental', b'httppeer.v2-encoder-order', default=None,
 )
 coreconfigitem(
     b'experimental', b'httppostargs', default=False,
 )
 coreconfigitem(
     b'experimental', b'mergedriver', default=None,
 )
 coreconfigitem(b'experimental', b'nointerrupt', default=False)
 coreconfigitem(b'experimental', b'nointerrupt-interactiveonly', default=True)
 
 coreconfigitem(
     b'experimental', b'obsmarkers-exchange-debug', default=False,
 )
 coreconfigitem(
     b'experimental', b'remotenames', default=False,
 )
 coreconfigitem(
     b'experimental', b'removeemptydirs', default=True,
 )
 coreconfigitem(
     b'experimental', b'revert.interactive.select-to-keep', default=False,
 )
 coreconfigitem(
     b'experimental', b'revisions.prefixhexnode', default=False,
 )
 coreconfigitem(
     b'experimental', b'revlogv2', default=None,
 )
 coreconfigitem(
     b'experimental', b'revisions.disambiguatewithin', default=None,
 )
 coreconfigitem(
     b'experimental', b'rust.index', default=False,
 )
 coreconfigitem(
     b'experimental', b'server.filesdata.recommended-batch-size', default=50000,
 )
 coreconfigitem(
     b'experimental',
     b'server.manifestdata.recommended-batch-size',
     default=100000,
 )
 coreconfigitem(
     b'experimental', b'server.stream-narrow-clones', default=False,
 )
 coreconfigitem(
     b'experimental', b'single-head-per-branch', default=False,
 )
 coreconfigitem(
     b'experimental',
     b'single-head-per-branch:account-closed-heads',
     default=False,
 )
 coreconfigitem(
     b'experimental', b'sshserver.support-v2', default=False,
 )
 coreconfigitem(
     b'experimental', b'sparse-read', default=False,
 )
 coreconfigitem(
     b'experimental', b'sparse-read.density-threshold', default=0.50,
 )
 coreconfigitem(
     b'experimental', b'sparse-read.min-gap-size', default=b'65K',
 )
 coreconfigitem(
     b'experimental', b'treemanifest', default=False,
 )
 coreconfigitem(
     b'experimental', b'update.atomic-file', default=False,
 )
 coreconfigitem(
     b'experimental', b'sshpeer.advertise-v2', default=False,
 )
 coreconfigitem(
     b'experimental', b'web.apiserver', default=False,
 )
 coreconfigitem(
     b'experimental', b'web.api.http-v2', default=False,
 )
 coreconfigitem(
     b'experimental', b'web.api.debugreflect', default=False,
 )
 coreconfigitem(
     b'experimental', b'worker.wdir-get-thread-safe', default=False,
 )
 coreconfigitem(
     b'experimental', b'worker.repository-upgrade', default=False,
 )
 coreconfigitem(
     b'experimental', b'xdiff', default=False,
 )
 coreconfigitem(
     b'extensions', b'.*', default=None, generic=True,
 )
 coreconfigitem(
     b'extdata', b'.*', default=None, generic=True,
 )
 coreconfigitem(
     b'format', b'bookmarks-in-store', default=False,
 )
 coreconfigitem(
     b'format', b'chunkcachesize', default=None, experimental=True,
 )
 coreconfigitem(
     b'format', b'dotencode', default=True,
 )
 coreconfigitem(
     b'format', b'generaldelta', default=False, experimental=True,
 )
 coreconfigitem(
     b'format', b'manifestcachesize', default=None, experimental=True,
 )
 coreconfigitem(
     b'format', b'maxchainlen', default=dynamicdefault, experimental=True,
 )
 coreconfigitem(
     b'format', b'obsstore-version', default=None,
 )
 coreconfigitem(
     b'format', b'sparse-revlog', default=True,
 )
 coreconfigitem(
     b'format',
     b'revlog-compression',
     default=lambda: [b'zlib'],
     alias=[(b'experimental', b'format.compression')],
 )
 coreconfigitem(
     b'format', b'usefncache', default=True,
 )
 coreconfigitem(
     b'format', b'usegeneraldelta', default=True,
 )
 coreconfigitem(
     b'format', b'usestore', default=True,
 )
 # Right now, the only efficient implement of the nodemap logic is in Rust, so
 # the persistent nodemap feature needs to stay experimental as long as the Rust
 # extensions are an experimental feature.
 coreconfigitem(
     b'format', b'use-persistent-nodemap', default=False, experimental=True
 )
 coreconfigitem(
     b'format',
     b'exp-use-copies-side-data-changeset',
     default=False,
     experimental=True,
 )
 coreconfigitem(
     b'format', b'exp-use-side-data', default=False, experimental=True,
 )
 coreconfigitem(
     b'format', b'internal-phase', default=False, experimental=True,
 )
 coreconfigitem(
     b'fsmonitor', b'warn_when_unused', default=True,
 )
 coreconfigitem(
     b'fsmonitor', b'warn_update_file_count', default=50000,
 )
 coreconfigitem(
+    b'fsmonitor', b'warn_update_file_count_rust', default=400000,
+)
+coreconfigitem(
     b'help', br'hidden-command\..*', default=False, generic=True,
 )
 coreconfigitem(
     b'help', br'hidden-topic\..*', default=False, generic=True,
 )
 coreconfigitem(
     b'hooks', b'.*', default=dynamicdefault, generic=True,
 )
 coreconfigitem(
     b'hgweb-paths', b'.*', default=list, generic=True,
 )
 coreconfigitem(
     b'hostfingerprints', b'.*', default=list, generic=True,
 )
 coreconfigitem(
     b'hostsecurity', b'ciphers', default=None,
 )
 coreconfigitem(
     b'hostsecurity', b'minimumprotocol', default=dynamicdefault,
 )
 coreconfigitem(
     b'hostsecurity',
     b'.*:minimumprotocol$',
     default=dynamicdefault,
     generic=True,
 )
 coreconfigitem(
     b'hostsecurity', b'.*:ciphers$', default=dynamicdefault, generic=True,
 )
 coreconfigitem(
     b'hostsecurity', b'.*:fingerprints$', default=list, generic=True,
 )
 coreconfigitem(
     b'hostsecurity', b'.*:verifycertsfile$', default=None, generic=True,
 )
 
 coreconfigitem(
     b'http_proxy', b'always', default=False,
 )
 coreconfigitem(
     b'http_proxy', b'host', default=None,
 )
 coreconfigitem(
     b'http_proxy', b'no', default=list,
 )
 coreconfigitem(
     b'http_proxy', b'passwd', default=None,
 )
 coreconfigitem(
     b'http_proxy', b'user', default=None,
 )
 
 coreconfigitem(
     b'http', b'timeout', default=None,
 )
 
 coreconfigitem(
     b'logtoprocess', b'commandexception', default=None,
 )
 coreconfigitem(
     b'logtoprocess', b'commandfinish', default=None,
 )
 coreconfigitem(
     b'logtoprocess', b'command', default=None,
 )
 coreconfigitem(
     b'logtoprocess', b'develwarn', default=None,
 )
 coreconfigitem(
     b'logtoprocess', b'uiblocked', default=None,
 )
 coreconfigitem(
     b'merge', b'checkunknown', default=b'abort',
 )
 coreconfigitem(
     b'merge', b'checkignored', default=b'abort',
 )
 coreconfigitem(
     b'experimental', b'merge.checkpathconflicts', default=False,
 )
 coreconfigitem(
     b'merge', b'followcopies', default=True,
 )
 coreconfigitem(
     b'merge', b'on-failure', default=b'continue',
 )
 coreconfigitem(
     b'merge', b'preferancestor', default=lambda: [b'*'], experimental=True,
 )
 coreconfigitem(
     b'merge', b'strict-capability-check', default=False,
 )
 coreconfigitem(
     b'merge-tools', b'.*', default=None, generic=True,
 )
 coreconfigitem(
     b'merge-tools',
     br'.*\.args$',
     default=b"$local $base $other",
     generic=True,
     priority=-1,
 )
 coreconfigitem(
     b'merge-tools', br'.*\.binary$', default=False, generic=True, priority=-1,
 )
 coreconfigitem(
     b'merge-tools', br'.*\.check$', default=list, generic=True, priority=-1,
 )
 coreconfigitem(
     b'merge-tools',
     br'.*\.checkchanged$',
     default=False,
     generic=True,
     priority=-1,
 )
 coreconfigitem(
     b'merge-tools',
     br'.*\.executable$',
     default=dynamicdefault,
     generic=True,
     priority=-1,
 )
 coreconfigitem(
     b'merge-tools', br'.*\.fixeol$', default=False, generic=True, priority=-1,
 )
 coreconfigitem(
     b'merge-tools', br'.*\.gui$', default=False, generic=True, priority=-1,
 )
 coreconfigitem(
     b'merge-tools',
     br'.*\.mergemarkers$',
     default=b'basic',
     generic=True,
     priority=-1,
 )
 coreconfigitem(
     b'merge-tools',
     br'.*\.mergemarkertemplate$',
     default=dynamicdefault,  # take from ui.mergemarkertemplate
     generic=True,
     priority=-1,
 )
 coreconfigitem(
     b'merge-tools', br'.*\.priority$', default=0, generic=True, priority=-1,
 )
 coreconfigitem(
     b'merge-tools',
     br'.*\.premerge$',
     default=dynamicdefault,
     generic=True,
     priority=-1,
 )
 coreconfigitem(
     b'merge-tools', br'.*\.symlink$', default=False, generic=True, priority=-1,
 )
 coreconfigitem(
     b'pager', b'attend-.*', default=dynamicdefault, generic=True,
 )
 coreconfigitem(
     b'pager', b'ignore', default=list,
 )
 coreconfigitem(
     b'pager', b'pager', default=dynamicdefault,
 )
 coreconfigitem(
     b'patch', b'eol', default=b'strict',
 )
 coreconfigitem(
     b'patch', b'fuzz', default=2,
 )
 coreconfigitem(
     b'paths', b'default', default=None,
 )
 coreconfigitem(
     b'paths', b'default-push', default=None,
 )
 coreconfigitem(
     b'paths', b'.*', default=None, generic=True,
 )
 coreconfigitem(
     b'phases', b'checksubrepos', default=b'follow',
 )
 coreconfigitem(
     b'phases', b'new-commit', default=b'draft',
 )
 coreconfigitem(
     b'phases', b'publish', default=True,
 )
 coreconfigitem(
     b'profiling', b'enabled', default=False,
 )
 coreconfigitem(
     b'profiling', b'format', default=b'text',
 )
 coreconfigitem(
     b'profiling', b'freq', default=1000,
 )
 coreconfigitem(
     b'profiling', b'limit', default=30,
 )
 coreconfigitem(
     b'profiling', b'nested', default=0,
 )
 coreconfigitem(
     b'profiling', b'output', default=None,
 )
 coreconfigitem(
     b'profiling', b'showmax', default=0.999,
 )
 coreconfigitem(
     b'profiling', b'showmin', default=dynamicdefault,
 )
 coreconfigitem(
     b'profiling', b'showtime', default=True,
 )
 coreconfigitem(
     b'profiling', b'sort', default=b'inlinetime',
 )
 coreconfigitem(
     b'profiling', b'statformat', default=b'hotpath',
 )
 coreconfigitem(
     b'profiling', b'time-track', default=dynamicdefault,
 )
 coreconfigitem(
     b'profiling', b'type', default=b'stat',
 )
 coreconfigitem(
     b'progress', b'assume-tty', default=False,
 )
 coreconfigitem(
     b'progress', b'changedelay', default=1,
 )
 coreconfigitem(
     b'progress', b'clear-complete', default=True,
 )
 coreconfigitem(
     b'progress', b'debug', default=False,
 )
 coreconfigitem(
     b'progress', b'delay', default=3,
 )
 coreconfigitem(
     b'progress', b'disable', default=False,
 )
 coreconfigitem(
     b'progress', b'estimateinterval', default=60.0,
 )
 coreconfigitem(
     b'progress',
     b'format',
     default=lambda: [b'topic', b'bar', b'number', b'estimate'],
 )
 coreconfigitem(
     b'progress', b'refresh', default=0.1,
 )
 coreconfigitem(
     b'progress', b'width', default=dynamicdefault,
 )
 coreconfigitem(
     b'pull', b'confirm', default=False,
 )
 coreconfigitem(
     b'push', b'pushvars.server', default=False,
 )
 coreconfigitem(
     b'rewrite',
     b'backup-bundle',
     default=True,
     alias=[(b'ui', b'history-editing-backup')],
 )
 coreconfigitem(
     b'rewrite', b'update-timestamp', default=False,
 )
 coreconfigitem(
     b'rewrite', b'empty-successor', default=b'skip', experimental=True,
 )
 coreconfigitem(
     b'storage', b'new-repo-backend', default=b'revlogv1', experimental=True,
 )
 coreconfigitem(
     b'storage',
     b'revlog.optimize-delta-parent-choice',
     default=True,
     alias=[(b'format', b'aggressivemergedeltas')],
 )
 # experimental as long as rust is experimental (or a C version is implemented)
 coreconfigitem(
     b'storage', b'revlog.nodemap.mmap', default=True, experimental=True
 )
 # experimental as long as format.use-persistent-nodemap is.
 coreconfigitem(
     b'storage', b'revlog.nodemap.mode', default=b'compat', experimental=True
 )
 coreconfigitem(
     b'storage', b'revlog.reuse-external-delta', default=True,
 )
 coreconfigitem(
     b'storage', b'revlog.reuse-external-delta-parent', default=None,
 )
 coreconfigitem(
     b'storage', b'revlog.zlib.level', default=None,
 )
 coreconfigitem(
     b'storage', b'revlog.zstd.level', default=None,
 )
 coreconfigitem(
     b'server', b'bookmarks-pushkey-compat', default=True,
 )
 coreconfigitem(
     b'server', b'bundle1', default=True,
 )
 coreconfigitem(
     b'server', b'bundle1gd', default=None,
 )
 coreconfigitem(
     b'server', b'bundle1.pull', default=None,
 )
 coreconfigitem(
     b'server', b'bundle1gd.pull', default=None,
 )
 coreconfigitem(
     b'server', b'bundle1.push', default=None,
 )
 coreconfigitem(
     b'server', b'bundle1gd.push', default=None,
 )
 coreconfigitem(
     b'server',
     b'bundle2.stream',
     default=True,
     alias=[(b'experimental', b'bundle2.stream')],
 )
 coreconfigitem(
     b'server', b'compressionengines', default=list,
 )
 coreconfigitem(
     b'server', b'concurrent-push-mode', default=b'check-related',
 )
 coreconfigitem(
     b'server', b'disablefullbundle', default=False,
 )
 coreconfigitem(
     b'server', b'maxhttpheaderlen', default=1024,
 )
 coreconfigitem(
     b'server', b'pullbundle', default=False,
 )
 coreconfigitem(
     b'server', b'preferuncompressed', default=False,
 )
 coreconfigitem(
     b'server', b'streamunbundle', default=False,
 )
 coreconfigitem(
     b'server', b'uncompressed', default=True,
 )
 coreconfigitem(
     b'server', b'uncompressedallowsecret', default=False,
 )
 coreconfigitem(
     b'server', b'view', default=b'served',
 )
 coreconfigitem(
     b'server', b'validate', default=False,
 )
 coreconfigitem(
     b'server', b'zliblevel', default=-1,
 )
 coreconfigitem(
     b'server', b'zstdlevel', default=3,
 )
 coreconfigitem(
     b'share', b'pool', default=None,
 )
 coreconfigitem(
     b'share', b'poolnaming', default=b'identity',
 )
 coreconfigitem(
     b'shelve', b'maxbackups', default=10,
 )
 coreconfigitem(
     b'smtp', b'host', default=None,
 )
 coreconfigitem(
     b'smtp', b'local_hostname', default=None,
 )
 coreconfigitem(
     b'smtp', b'password', default=None,
 )
 coreconfigitem(
     b'smtp', b'port', default=dynamicdefault,
 )
 coreconfigitem(
     b'smtp', b'tls', default=b'none',
 )
 coreconfigitem(
     b'smtp', b'username', default=None,
 )
 coreconfigitem(
     b'sparse', b'missingwarning', default=True, experimental=True,
 )
 coreconfigitem(
     b'subrepos',
     b'allowed',
     default=dynamicdefault,  # to make backporting simpler
 )
 coreconfigitem(
     b'subrepos', b'hg:allowed', default=dynamicdefault,
 )
 coreconfigitem(
     b'subrepos', b'git:allowed', default=dynamicdefault,
 )
 coreconfigitem(
     b'subrepos', b'svn:allowed', default=dynamicdefault,
 )
 coreconfigitem(
     b'templates', b'.*', default=None, generic=True,
 )
 coreconfigitem(
     b'templateconfig', b'.*', default=dynamicdefault, generic=True,
 )
 coreconfigitem(
     b'trusted', b'groups', default=list,
 )
 coreconfigitem(
     b'trusted', b'users', default=list,
 )
 coreconfigitem(
     b'ui', b'_usedassubrepo', default=False,
 )
 coreconfigitem(
     b'ui', b'allowemptycommit', default=False,
 )
 coreconfigitem(
     b'ui', b'archivemeta', default=True,
 )
 coreconfigitem(
     b'ui', b'askusername', default=False,
 )
 coreconfigitem(
     b'ui', b'available-memory', default=None,
 )
 
 coreconfigitem(
     b'ui', b'clonebundlefallback', default=False,
 )
 coreconfigitem(
     b'ui', b'clonebundleprefers', default=list,
 )
 coreconfigitem(
     b'ui', b'clonebundles', default=True,
 )
 coreconfigitem(
     b'ui', b'color', default=b'auto',
 )
 coreconfigitem(
     b'ui', b'commitsubrepos', default=False,
 )
 coreconfigitem(
     b'ui', b'debug', default=False,
 )
 coreconfigitem(
     b'ui', b'debugger', default=None,
 )
 coreconfigitem(
     b'ui', b'editor', default=dynamicdefault,
 )
 coreconfigitem(
     b'ui', b'fallbackencoding', default=None,
 )
 coreconfigitem(
     b'ui', b'forcecwd', default=None,
 )
 coreconfigitem(
     b'ui', b'forcemerge', default=None,
 )
 coreconfigitem(
     b'ui', b'formatdebug', default=False,
 )
 coreconfigitem(
     b'ui', b'formatjson', default=False,
 )
 coreconfigitem(
     b'ui', b'formatted', default=None,
 )
 coreconfigitem(
     b'ui', b'graphnodetemplate', default=None,
 )
 coreconfigitem(
     b'ui', b'interactive', default=None,
 )
 coreconfigitem(
     b'ui', b'interface', default=None,
 )
 coreconfigitem(
     b'ui', b'interface.chunkselector', default=None,
 )
 coreconfigitem(
     b'ui', b'large-file-limit', default=10000000,
 )
 coreconfigitem(
     b'ui', b'logblockedtimes', default=False,
 )
 coreconfigitem(
     b'ui', b'logtemplate', default=None,
 )
 coreconfigitem(
     b'ui', b'merge', default=None,
 )
 coreconfigitem(
     b'ui', b'mergemarkers', default=b'basic',
 )
 coreconfigitem(
     b'ui',
     b'mergemarkertemplate',
     default=(
         b'{node|short} '
         b'{ifeq(tags, "tip", "", '
         b'ifeq(tags, "", "", "{tags} "))}'
         b'{if(bookmarks, "{bookmarks} ")}'
         b'{ifeq(branch, "default", "", "{branch} ")}'
         b'- {author|user}: {desc|firstline}'
     ),
 )
 coreconfigitem(
     b'ui', b'message-output', default=b'stdio',
 )
 coreconfigitem(
     b'ui', b'nontty', default=False,
 )
 coreconfigitem(
     b'ui', b'origbackuppath', default=None,
 )
 coreconfigitem(
     b'ui', b'paginate', default=True,
 )
 coreconfigitem(
     b'ui', b'patch', default=None,
 )
 coreconfigitem(
     b'ui', b'pre-merge-tool-output-template', default=None,
 )
 coreconfigitem(
     b'ui', b'portablefilenames', default=b'warn',
 )
 coreconfigitem(
     b'ui', b'promptecho', default=False,
 )
 coreconfigitem(
     b'ui', b'quiet', default=False,
 )
 coreconfigitem(
     b'ui', b'quietbookmarkmove', default=False,
 )
 coreconfigitem(
     b'ui', b'relative-paths', default=b'legacy',
 )
 coreconfigitem(
     b'ui', b'remotecmd', default=b'hg',
 )
 coreconfigitem(
     b'ui', b'report_untrusted', default=True,
 )
 coreconfigitem(
     b'ui', b'rollback', default=True,
 )
 coreconfigitem(
     b'ui', b'signal-safe-lock', default=True,
 )
 coreconfigitem(
     b'ui', b'slash', default=False,
 )
 coreconfigitem(
     b'ui', b'ssh', default=b'ssh',
 )
 coreconfigitem(
     b'ui', b'ssherrorhint', default=None,
 )
 coreconfigitem(
     b'ui', b'statuscopies', default=False,
 )
 coreconfigitem(
     b'ui', b'strict', default=False,
 )
 coreconfigitem(
     b'ui', b'style', default=b'',
 )
 coreconfigitem(
     b'ui', b'supportcontact', default=None,
 )
 coreconfigitem(
     b'ui', b'textwidth', default=78,
 )
 coreconfigitem(
     b'ui', b'timeout', default=b'600',
 )
 coreconfigitem(
     b'ui', b'timeout.warn', default=0,
 )
 coreconfigitem(
     b'ui', b'timestamp-output', default=False,
 )
 coreconfigitem(
     b'ui', b'traceback', default=False,
 )
 coreconfigitem(
     b'ui', b'tweakdefaults', default=False,
 )
 coreconfigitem(b'ui', b'username', alias=[(b'ui', b'user')])
 coreconfigitem(
     b'ui', b'verbose', default=False,
 )
 coreconfigitem(
     b'verify', b'skipflags', default=None,
 )
 coreconfigitem(
     b'web', b'allowbz2', default=False,
 )
 coreconfigitem(
     b'web', b'allowgz', default=False,
 )
 coreconfigitem(
     b'web', b'allow-pull', alias=[(b'web', b'allowpull')], default=True,
 )
 coreconfigitem(
     b'web', b'allow-push', alias=[(b'web', b'allow_push')], default=list,
 )
 coreconfigitem(
     b'web', b'allowzip', default=False,
 )
 coreconfigitem(
     b'web', b'archivesubrepos', default=False,
 )
 coreconfigitem(
     b'web', b'cache', default=True,
 )
 coreconfigitem(
     b'web', b'comparisoncontext', default=5,
 )
 coreconfigitem(
     b'web', b'contact', default=None,
 )
 coreconfigitem(
     b'web', b'deny_push', default=list,
 )
 coreconfigitem(
     b'web', b'guessmime', default=False,
 )
 coreconfigitem(
     b'web', b'hidden', default=False,
 )
 coreconfigitem(
     b'web', b'labels', default=list,
 )
 coreconfigitem(
     b'web', b'logoimg', default=b'hglogo.png',
 )
 coreconfigitem(
     b'web', b'logourl', default=b'https://mercurial-scm.org/',
 )
 coreconfigitem(
     b'web', b'accesslog', default=b'-',
 )
 coreconfigitem(
     b'web', b'address', default=b'',
 )
 coreconfigitem(
     b'web', b'allow-archive', alias=[(b'web', b'allow_archive')], default=list,
 )
 coreconfigitem(
     b'web', b'allow_read', default=list,
 )
 coreconfigitem(
     b'web', b'baseurl', default=None,
 )
 coreconfigitem(
     b'web', b'cacerts', default=None,
 )
 coreconfigitem(
     b'web', b'certificate', default=None,
 )
 coreconfigitem(
     b'web', b'collapse', default=False,
 )
 coreconfigitem(
     b'web', b'csp', default=None,
 )
 coreconfigitem(
     b'web', b'deny_read', default=list,
 )
 coreconfigitem(
     b'web', b'descend', default=True,
 )
 coreconfigitem(
     b'web', b'description', default=b"",
 )
 coreconfigitem(
     b'web', b'encoding', default=lambda: encoding.encoding,
 )
 coreconfigitem(
     b'web', b'errorlog', default=b'-',
 )
 coreconfigitem(
     b'web', b'ipv6', default=False,
 )
 coreconfigitem(
     b'web', b'maxchanges', default=10,
 )
 coreconfigitem(
     b'web', b'maxfiles', default=10,
 )
 coreconfigitem(
     b'web', b'maxshortchanges', default=60,
 )
 coreconfigitem(
     b'web', b'motd', default=b'',
 )
 coreconfigitem(
     b'web', b'name', default=dynamicdefault,
 )
 coreconfigitem(
     b'web', b'port', default=8000,
 )
 coreconfigitem(
     b'web', b'prefix', default=b'',
 )
 coreconfigitem(
     b'web', b'push_ssl', default=True,
 )
 coreconfigitem(
     b'web', b'refreshinterval', default=20,
 )
 coreconfigitem(
     b'web', b'server-header', default=None,
 )
 coreconfigitem(
     b'web', b'static', default=None,
 )
 coreconfigitem(
     b'web', b'staticurl', default=None,
 )
 coreconfigitem(
     b'web', b'stripes', default=1,
 )
 coreconfigitem(
     b'web', b'style', default=b'paper',
 )
 coreconfigitem(
     b'web', b'templates', default=None,
 )
 coreconfigitem(
     b'web', b'view', default=b'served', experimental=True,
 )
 coreconfigitem(
     b'worker', b'backgroundclose', default=dynamicdefault,
 )
 # Windows defaults to a limit of 512 open files. A buffer of 128
 # should give us enough headway.
 coreconfigitem(
     b'worker', b'backgroundclosemaxqueue', default=384,
 )
 coreconfigitem(
     b'worker', b'backgroundcloseminfilecount', default=2048,
 )
 coreconfigitem(
     b'worker', b'backgroundclosethreadcount', default=4,
 )
 coreconfigitem(
     b'worker', b'enabled', default=True,
 )
 coreconfigitem(
     b'worker', b'numcpus', default=None,
 )
 
 # Rebase related configuration moved to core because other extension are doing
 # strange things. For example, shelve import the extensions to reuse some bit
 # without formally loading it.
 coreconfigitem(
     b'commands', b'rebase.requiredest', default=False,
 )
 coreconfigitem(
     b'experimental', b'rebaseskipobsolete', default=True,
 )
 coreconfigitem(
     b'rebase', b'singletransaction', default=False,
 )
 coreconfigitem(
     b'rebase', b'experimental.inmemory', default=False,
 )

mercurial/merge.py

@@ -1,2274 +1,2283 b''
 # merge.py - directory-level update/merge handling for Mercurial
 #
 # Copyright 2006, 2007 Matt Mackall <[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.
 
 from __future__ import absolute_import
 
 import collections
 import errno
 import stat
 import struct
 
 from .i18n import _
 from .node import (
     addednodeid,
     modifiednodeid,
     nullid,
     nullrev,
 )
 from .thirdparty import attr
 from . import (
     copies,
     encoding,
     error,
     filemerge,
     match as matchmod,
     mergestate as mergestatemod,
     obsutil,
     pathutil,
     pycompat,
     scmutil,
     subrepoutil,
     util,
     worker,
 )
 
 _pack = struct.pack
 _unpack = struct.unpack
 
 
 def _getcheckunknownconfig(repo, section, name):
     config = repo.ui.config(section, name)
     valid = [b'abort', b'ignore', b'warn']
     if config not in valid:
         validstr = b', '.join([b"'" + v + b"'" for v in valid])
         raise error.ConfigError(
             _(b"%s.%s not valid ('%s' is none of %s)")
             % (section, name, config, validstr)
         )
     return config
 
 
 def _checkunknownfile(repo, wctx, mctx, f, f2=None):
     if wctx.isinmemory():
         # Nothing to do in IMM because nothing in the "working copy" can be an
         # unknown file.
         #
         # Note that we should bail out here, not in ``_checkunknownfiles()``,
         # because that function does other useful work.
         return False
 
     if f2 is None:
         f2 = f
     return (
         repo.wvfs.audit.check(f)
         and repo.wvfs.isfileorlink(f)
         and repo.dirstate.normalize(f) not in repo.dirstate
         and mctx[f2].cmp(wctx[f])
     )
 
 
 class _unknowndirschecker(object):
     """
     Look for any unknown files or directories that may have a path conflict
     with a file.  If any path prefix of the file exists as a file or link,
     then it conflicts.  If the file itself is a directory that contains any
     file that is not tracked, then it conflicts.
 
     Returns the shortest path at which a conflict occurs, or None if there is
     no conflict.
     """
 
     def __init__(self):
         # A set of paths known to be good.  This prevents repeated checking of
         # dirs.  It will be updated with any new dirs that are checked and found
         # to be safe.
         self._unknowndircache = set()
 
         # A set of paths that are known to be absent.  This prevents repeated
         # checking of subdirectories that are known not to exist. It will be
         # updated with any new dirs that are checked and found to be absent.
         self._missingdircache = set()
 
     def __call__(self, repo, wctx, f):
         if wctx.isinmemory():
             # Nothing to do in IMM for the same reason as ``_checkunknownfile``.
             return False
 
         # Check for path prefixes that exist as unknown files.
         for p in reversed(list(pathutil.finddirs(f))):
             if p in self._missingdircache:
                 return
             if p in self._unknowndircache:
                 continue
             if repo.wvfs.audit.check(p):
                 if (
                     repo.wvfs.isfileorlink(p)
                     and repo.dirstate.normalize(p) not in repo.dirstate
                 ):
                     return p
                 if not repo.wvfs.lexists(p):
                     self._missingdircache.add(p)
                     return
                 self._unknowndircache.add(p)
 
         # Check if the file conflicts with a directory containing unknown files.
         if repo.wvfs.audit.check(f) and repo.wvfs.isdir(f):
             # Does the directory contain any files that are not in the dirstate?
             for p, dirs, files in repo.wvfs.walk(f):
                 for fn in files:
                     relf = util.pconvert(repo.wvfs.reljoin(p, fn))
                     relf = repo.dirstate.normalize(relf, isknown=True)
                     if relf not in repo.dirstate:
                         return f
         return None
 
 
 def _checkunknownfiles(repo, wctx, mctx, force, mresult, mergeforce):
     """
     Considers any actions that care about the presence of conflicting unknown
     files. For some actions, the result is to abort; for others, it is to
     choose a different action.
     """
     fileconflicts = set()
     pathconflicts = set()
     warnconflicts = set()
     abortconflicts = set()
     unknownconfig = _getcheckunknownconfig(repo, b'merge', b'checkunknown')
     ignoredconfig = _getcheckunknownconfig(repo, b'merge', b'checkignored')
     pathconfig = repo.ui.configbool(
         b'experimental', b'merge.checkpathconflicts'
     )
     if not force:
 
         def collectconflicts(conflicts, config):
             if config == b'abort':
                 abortconflicts.update(conflicts)
             elif config == b'warn':
                 warnconflicts.update(conflicts)
 
         checkunknowndirs = _unknowndirschecker()
         for f in mresult.files(
             (
                 mergestatemod.ACTION_CREATED,
                 mergestatemod.ACTION_DELETED_CHANGED,
             )
         ):
             if _checkunknownfile(repo, wctx, mctx, f):
                 fileconflicts.add(f)
             elif pathconfig and f not in wctx:
                 path = checkunknowndirs(repo, wctx, f)
                 if path is not None:
                     pathconflicts.add(path)
         for f, args, msg in mresult.getactions(
             [mergestatemod.ACTION_LOCAL_DIR_RENAME_GET]
         ):
             if _checkunknownfile(repo, wctx, mctx, f, args[0]):
                 fileconflicts.add(f)
 
         allconflicts = fileconflicts | pathconflicts
         ignoredconflicts = {c for c in allconflicts if repo.dirstate._ignore(c)}
         unknownconflicts = allconflicts - ignoredconflicts
         collectconflicts(ignoredconflicts, ignoredconfig)
         collectconflicts(unknownconflicts, unknownconfig)
     else:
         for f, args, msg in list(
             mresult.getactions([mergestatemod.ACTION_CREATED_MERGE])
         ):
             fl2, anc = args
             different = _checkunknownfile(repo, wctx, mctx, f)
             if repo.dirstate._ignore(f):
                 config = ignoredconfig
             else:
                 config = unknownconfig
 
             # The behavior when force is True is described by this table:
             #  config  different  mergeforce  |    action    backup
             #    *         n          *       |      get        n
             #    *         y          y       |     merge       -
             #   abort      y          n       |     merge       -   (1)
             #   warn       y          n       |  warn + get     y
             #  ignore      y          n       |      get        y
             #
             # (1) this is probably the wrong behavior here -- we should
             #     probably abort, but some actions like rebases currently
             #     don't like an abort happening in the middle of
             #     merge.update.
             if not different:
                 mresult.addfile(
                     f,
                     mergestatemod.ACTION_GET,
                     (fl2, False),
                     b'remote created',
                 )
             elif mergeforce or config == b'abort':
                 mresult.addfile(
                     f,
                     mergestatemod.ACTION_MERGE,
                     (f, f, None, False, anc),
                     b'remote differs from untracked local',
                 )
             elif config == b'abort':
                 abortconflicts.add(f)
             else:
                 if config == b'warn':
                     warnconflicts.add(f)
                 mresult.addfile(
                     f, mergestatemod.ACTION_GET, (fl2, True), b'remote created',
                 )
 
     for f in sorted(abortconflicts):
         warn = repo.ui.warn
         if f in pathconflicts:
             if repo.wvfs.isfileorlink(f):
                 warn(_(b"%s: untracked file conflicts with directory\n") % f)
             else:
                 warn(_(b"%s: untracked directory conflicts with file\n") % f)
         else:
             warn(_(b"%s: untracked file differs\n") % f)
     if abortconflicts:
         raise error.Abort(
             _(
                 b"untracked files in working directory "
                 b"differ from files in requested revision"
             )
         )
 
     for f in sorted(warnconflicts):
         if repo.wvfs.isfileorlink(f):
             repo.ui.warn(_(b"%s: replacing untracked file\n") % f)
         else:
             repo.ui.warn(_(b"%s: replacing untracked files in directory\n") % f)
 
     for f, args, msg in list(
         mresult.getactions([mergestatemod.ACTION_CREATED])
     ):
         backup = (
             f in fileconflicts
             or f in pathconflicts
             or any(p in pathconflicts for p in pathutil.finddirs(f))
         )
         (flags,) = args
         mresult.addfile(f, mergestatemod.ACTION_GET, (flags, backup), msg)
 
 
 def _forgetremoved(wctx, mctx, branchmerge, mresult):
     """
     Forget removed files
 
     If we're jumping between revisions (as opposed to merging), and if
     neither the working directory nor the target rev has the file,
     then we need to remove it from the dirstate, to prevent the
     dirstate from listing the file when it is no longer in the
     manifest.
 
     If we're merging, and the other revision has removed a file
     that is not present in the working directory, we need to mark it
     as removed.
     """
 
     m = mergestatemod.ACTION_FORGET
     if branchmerge:
         m = mergestatemod.ACTION_REMOVE
     for f in wctx.deleted():
         if f not in mctx:
             mresult.addfile(f, m, None, b"forget deleted")
 
     if not branchmerge:
         for f in wctx.removed():
             if f not in mctx:
                 mresult.addfile(
                     f, mergestatemod.ACTION_FORGET, None, b"forget removed",
                 )
 
 
 def _checkcollision(repo, wmf, mresult):
     """
     Check for case-folding collisions.
     """
     # If the repo is narrowed, filter out files outside the narrowspec.
     narrowmatch = repo.narrowmatch()
     if not narrowmatch.always():
         pmmf = set(wmf.walk(narrowmatch))
         if mresult:
             for f in list(mresult.files()):
                 if not narrowmatch(f):
                     mresult.removefile(f)
     else:
         # build provisional merged manifest up
         pmmf = set(wmf)
 
     if mresult:
         # KEEP and EXEC are no-op
         for f in mresult.files(
             (
                 mergestatemod.ACTION_ADD,
                 mergestatemod.ACTION_ADD_MODIFIED,
                 mergestatemod.ACTION_FORGET,
                 mergestatemod.ACTION_GET,
                 mergestatemod.ACTION_CHANGED_DELETED,
                 mergestatemod.ACTION_DELETED_CHANGED,
             )
         ):
             pmmf.add(f)
         for f in mresult.files((mergestatemod.ACTION_REMOVE,)):
             pmmf.discard(f)
         for f, args, msg in mresult.getactions(
             [mergestatemod.ACTION_DIR_RENAME_MOVE_LOCAL]
         ):
             f2, flags = args
             pmmf.discard(f2)
             pmmf.add(f)
         for f in mresult.files((mergestatemod.ACTION_LOCAL_DIR_RENAME_GET,)):
             pmmf.add(f)
         for f, args, msg in mresult.getactions([mergestatemod.ACTION_MERGE]):
             f1, f2, fa, move, anc = args
             if move:
                 pmmf.discard(f1)
             pmmf.add(f)
 
     # check case-folding collision in provisional merged manifest
     foldmap = {}
     for f in pmmf:
         fold = util.normcase(f)
         if fold in foldmap:
             raise error.Abort(
                 _(b"case-folding collision between %s and %s")
                 % (f, foldmap[fold])
             )
         foldmap[fold] = f
 
     # check case-folding of directories
     foldprefix = unfoldprefix = lastfull = b''
     for fold, f in sorted(foldmap.items()):
         if fold.startswith(foldprefix) and not f.startswith(unfoldprefix):
             # the folded prefix matches but actual casing is different
             raise error.Abort(
                 _(b"case-folding collision between %s and directory of %s")
                 % (lastfull, f)
             )
         foldprefix = fold + b'/'
         unfoldprefix = f + b'/'
         lastfull = f
 
 
 def driverpreprocess(repo, ms, wctx, labels=None):
     """run the preprocess step of the merge driver, if any
 
     This is currently not implemented -- it's an extension point."""
     return True
 
 
 def driverconclude(repo, ms, wctx, labels=None):
     """run the conclude step of the merge driver, if any
 
     This is currently not implemented -- it's an extension point."""
     return True
 
 
 def _filesindirs(repo, manifest, dirs):
     """
     Generator that yields pairs of all the files in the manifest that are found
     inside the directories listed in dirs, and which directory they are found
     in.
     """
     for f in manifest:
         for p in pathutil.finddirs(f):
             if p in dirs:
                 yield f, p
                 break
 
 
 def checkpathconflicts(repo, wctx, mctx, mresult):
     """
     Check if any actions introduce path conflicts in the repository, updating
     actions to record or handle the path conflict accordingly.
     """
     mf = wctx.manifest()
 
     # The set of local files that conflict with a remote directory.
     localconflicts = set()
 
     # The set of directories that conflict with a remote file, and so may cause
     # conflicts if they still contain any files after the merge.
     remoteconflicts = set()
 
     # The set of directories that appear as both a file and a directory in the
     # remote manifest.  These indicate an invalid remote manifest, which
     # can't be updated to cleanly.
     invalidconflicts = set()
 
     # The set of directories that contain files that are being created.
     createdfiledirs = set()
 
     # The set of files deleted by all the actions.
     deletedfiles = set()
 
     for f in mresult.files(
         (
             mergestatemod.ACTION_CREATED,
             mergestatemod.ACTION_DELETED_CHANGED,
             mergestatemod.ACTION_MERGE,
             mergestatemod.ACTION_CREATED_MERGE,
         )
     ):
         # This action may create a new local file.
         createdfiledirs.update(pathutil.finddirs(f))
         if mf.hasdir(f):
             # The file aliases a local directory.  This might be ok if all
             # the files in the local directory are being deleted.  This
             # will be checked once we know what all the deleted files are.
             remoteconflicts.add(f)
     # Track the names of all deleted files.
     for f in mresult.files((mergestatemod.ACTION_REMOVE,)):
         deletedfiles.add(f)
     for (f, args, msg) in mresult.getactions((mergestatemod.ACTION_MERGE,)):
         f1, f2, fa, move, anc = args
         if move:
             deletedfiles.add(f1)
     for (f, args, msg) in mresult.getactions(
         (mergestatemod.ACTION_DIR_RENAME_MOVE_LOCAL,)
     ):
         f2, flags = args
         deletedfiles.add(f2)
 
     # Check all directories that contain created files for path conflicts.
     for p in createdfiledirs:
         if p in mf:
             if p in mctx:
                 # A file is in a directory which aliases both a local
                 # and a remote file.  This is an internal inconsistency
                 # within the remote manifest.
                 invalidconflicts.add(p)
             else:
                 # A file is in a directory which aliases a local file.
                 # We will need to rename the local file.
                 localconflicts.add(p)
         pd = mresult.getfile(p)
         if pd and pd[0] in (
             mergestatemod.ACTION_CREATED,
             mergestatemod.ACTION_DELETED_CHANGED,
             mergestatemod.ACTION_MERGE,
             mergestatemod.ACTION_CREATED_MERGE,
         ):
             # The file is in a directory which aliases a remote file.
             # This is an internal inconsistency within the remote
             # manifest.
             invalidconflicts.add(p)
 
     # Rename all local conflicting files that have not been deleted.
     for p in localconflicts:
         if p not in deletedfiles:
             ctxname = bytes(wctx).rstrip(b'+')
             pnew = util.safename(p, ctxname, wctx, set(mresult.files()))
             porig = wctx[p].copysource() or p
             mresult.addfile(
                 pnew,
                 mergestatemod.ACTION_PATH_CONFLICT_RESOLVE,
                 (p, porig),
                 b'local path conflict',
             )
             mresult.addfile(
                 p,
                 mergestatemod.ACTION_PATH_CONFLICT,
                 (pnew, b'l'),
                 b'path conflict',
             )
 
     if remoteconflicts:
         # Check if all files in the conflicting directories have been removed.
         ctxname = bytes(mctx).rstrip(b'+')
         for f, p in _filesindirs(repo, mf, remoteconflicts):
             if f not in deletedfiles:
                 m, args, msg = mresult.getfile(p)
                 pnew = util.safename(p, ctxname, wctx, set(mresult.files()))
                 if m in (
                     mergestatemod.ACTION_DELETED_CHANGED,
                     mergestatemod.ACTION_MERGE,
                 ):
                     # Action was merge, just update target.
                     mresult.addfile(pnew, m, args, msg)
                 else:
                     # Action was create, change to renamed get action.
                     fl = args[0]
                     mresult.addfile(
                         pnew,
                         mergestatemod.ACTION_LOCAL_DIR_RENAME_GET,
                         (p, fl),
                         b'remote path conflict',
                     )
                 mresult.addfile(
                     p,
                     mergestatemod.ACTION_PATH_CONFLICT,
                     (pnew, mergestatemod.ACTION_REMOVE),
                     b'path conflict',
                 )
                 remoteconflicts.remove(p)
                 break
 
     if invalidconflicts:
         for p in invalidconflicts:
             repo.ui.warn(_(b"%s: is both a file and a directory\n") % p)
         raise error.Abort(_(b"destination manifest contains path conflicts"))
 
 
 def _filternarrowactions(narrowmatch, branchmerge, mresult):
     """
     Filters out actions that can ignored because the repo is narrowed.
 
     Raise an exception if the merge cannot be completed because the repo is
     narrowed.
     """
     # TODO: handle with nonconflicttypes
     nooptypes = {mergestatemod.ACTION_KEEP}
     nonconflicttypes = {
         mergestatemod.ACTION_ADD,
         mergestatemod.ACTION_ADD_MODIFIED,
         mergestatemod.ACTION_CREATED,
         mergestatemod.ACTION_CREATED_MERGE,
         mergestatemod.ACTION_FORGET,
         mergestatemod.ACTION_GET,
         mergestatemod.ACTION_REMOVE,
         mergestatemod.ACTION_EXEC,
     }
     # We mutate the items in the dict during iteration, so iterate
     # over a copy.
     for f, action in mresult.filemap():
         if narrowmatch(f):
             pass
         elif not branchmerge:
             mresult.removefile(f)  # just updating, ignore changes outside clone
         elif action[0] in nooptypes:
             mresult.removefile(f)  # merge does not affect file
         elif action[0] in nonconflicttypes:
             raise error.Abort(
                 _(
                     b'merge affects file \'%s\' outside narrow, '
                     b'which is not yet supported'
                 )
                 % f,
                 hint=_(b'merging in the other direction may work'),
             )
         else:
             raise error.Abort(
                 _(b'conflict in file \'%s\' is outside narrow clone') % f
             )
 
 
 class mergeresult(object):
     ''''An object representing result of merging manifests.
 
     It has information about what actions need to be performed on dirstate
     mapping of divergent renames and other such cases. '''
 
     def __init__(self):
         """
         filemapping: dict of filename as keys and action related info as values
         diverge: mapping of source name -> list of dest name for
                  divergent renames
         renamedelete: mapping of source name -> list of destinations for files
                       deleted on one side and renamed on other.
         commitinfo: dict containing data which should be used on commit
                     contains a filename -> info mapping
         actionmapping: dict of action names as keys and values are dict of
                        filename as key and related data as values
         """
         self._filemapping = {}
         self._diverge = {}
         self._renamedelete = {}
         self._commitinfo = collections.defaultdict(dict)
         self._actionmapping = collections.defaultdict(dict)
 
     def updatevalues(self, diverge, renamedelete):
         self._diverge = diverge
         self._renamedelete = renamedelete
 
     def addfile(self, filename, action, data, message):
         """ adds a new file to the mergeresult object
 
         filename: file which we are adding
         action: one of mergestatemod.ACTION_*
         data: a tuple of information like fctx and ctx related to this merge
         message: a message about the merge
         """
         # if the file already existed, we need to delete it's old
         # entry form _actionmapping too
         if filename in self._filemapping:
             a, d, m = self._filemapping[filename]
             del self._actionmapping[a][filename]
 
         self._filemapping[filename] = (action, data, message)
         self._actionmapping[action][filename] = (data, message)
 
     def getfile(self, filename, default_return=None):
         """ returns (action, args, msg) about this file
 
         returns default_return if the file is not present """
         if filename in self._filemapping:
             return self._filemapping[filename]
         return default_return
 
     def files(self, actions=None):
         """ returns files on which provided action needs to perfromed
 
         If actions is None, all files are returned
         """
         # TODO: think whether we should return renamedelete and
         # diverge filenames also
         if actions is None:
             for f in self._filemapping:
                 yield f
 
         else:
             for a in actions:
                 for f in self._actionmapping[a]:
                     yield f
 
     def removefile(self, filename):
         """ removes a file from the mergeresult object as the file might
         not merging anymore """
         action, data, message = self._filemapping[filename]
         del self._filemapping[filename]
         del self._actionmapping[action][filename]
 
     def getactions(self, actions, sort=False):
         """ get list of files which are marked with these actions
         if sort is true, files for each action is sorted and then added
 
         Returns a list of tuple of form (filename, data, message)
         """
         for a in actions:
             if sort:
                 for f in sorted(self._actionmapping[a]):
                     args, msg = self._actionmapping[a][f]
                     yield f, args, msg
             else:
                 for f, (args, msg) in pycompat.iteritems(
                     self._actionmapping[a]
                 ):
                     yield f, args, msg
 
     def len(self, actions=None):
         """ returns number of files which needs actions
 
         if actions is passed, total of number of files in that action
         only is returned """
 
         if actions is None:
             return len(self._filemapping)
 
         return sum(len(self._actionmapping[a]) for a in actions)
 
     def filemap(self, sort=False):
         if sorted:
             for key, val in sorted(pycompat.iteritems(self._filemapping)):
                 yield key, val
         else:
             for key, val in pycompat.iteritems(self._filemapping):
                 yield key, val
 
     def addcommitinfo(self, filename, key, value):
         """ adds key-value information about filename which will be required
         while committing this merge """
         self._commitinfo[filename][key] = value
 
     @property
     def diverge(self):
         return self._diverge
 
     @property
     def renamedelete(self):
         return self._renamedelete
 
     @property
     def commitinfo(self):
         return self._commitinfo
 
     @property
     def actionsdict(self):
         """ returns a dictionary of actions to be perfomed with action as key
         and a list of files and related arguments as values """
         res = collections.defaultdict(list)
         for a, d in pycompat.iteritems(self._actionmapping):
             for f, (args, msg) in pycompat.iteritems(d):
                 res[a].append((f, args, msg))
         return res
 
     def setactions(self, actions):
         self._filemapping = actions
         self._actionmapping = collections.defaultdict(dict)
         for f, (act, data, msg) in pycompat.iteritems(self._filemapping):
             self._actionmapping[act][f] = data, msg
 
     def hasconflicts(self):
         """ tells whether this merge resulted in some actions which can
         result in conflicts or not """
         for a in self._actionmapping.keys():
             if (
                 a
                 not in (
                     mergestatemod.ACTION_GET,
                     mergestatemod.ACTION_KEEP,
                     mergestatemod.ACTION_EXEC,
                     mergestatemod.ACTION_REMOVE,
                     mergestatemod.ACTION_PATH_CONFLICT_RESOLVE,
                 )
                 and self._actionmapping[a]
             ):
                 return True
 
         return False
 
 
 def manifestmerge(
     repo,
     wctx,
     p2,
     pa,
     branchmerge,
     force,
     matcher,
     acceptremote,
     followcopies,
     forcefulldiff=False,
 ):
     """
     Merge wctx and p2 with ancestor pa and generate merge action list
 
     branchmerge and force are as passed in to update
     matcher = matcher to filter file lists
     acceptremote = accept the incoming changes without prompting
 
     Returns an object of mergeresult class
     """
     mresult = mergeresult()
     if matcher is not None and matcher.always():
         matcher = None
 
     # manifests fetched in order are going to be faster, so prime the caches
     [
         x.manifest()
         for x in sorted(wctx.parents() + [p2, pa], key=scmutil.intrev)
     ]
 
     branch_copies1 = copies.branch_copies()
     branch_copies2 = copies.branch_copies()
     diverge = {}
     # information from merge which is needed at commit time
     # for example choosing filelog of which parent to commit
     # TODO: use specific constants in future for this mapping
     if followcopies:
         branch_copies1, branch_copies2, diverge = copies.mergecopies(
             repo, wctx, p2, pa
         )
 
     boolbm = pycompat.bytestr(bool(branchmerge))
     boolf = pycompat.bytestr(bool(force))
     boolm = pycompat.bytestr(bool(matcher))
     repo.ui.note(_(b"resolving manifests\n"))
     repo.ui.debug(
         b" branchmerge: %s, force: %s, partial: %s\n" % (boolbm, boolf, boolm)
     )
     repo.ui.debug(b" ancestor: %s, local: %s, remote: %s\n" % (pa, wctx, p2))
 
     m1, m2, ma = wctx.manifest(), p2.manifest(), pa.manifest()
     copied1 = set(branch_copies1.copy.values())
     copied1.update(branch_copies1.movewithdir.values())
     copied2 = set(branch_copies2.copy.values())
     copied2.update(branch_copies2.movewithdir.values())
 
     if b'.hgsubstate' in m1 and wctx.rev() is None:
         # Check whether sub state is modified, and overwrite the manifest
         # to flag the change. If wctx is a committed revision, we shouldn't
         # care for the dirty state of the working directory.
         if any(wctx.sub(s).dirty() for s in wctx.substate):
             m1[b'.hgsubstate'] = modifiednodeid
 
     # Don't use m2-vs-ma optimization if:
     # - ma is the same as m1 or m2, which we're just going to diff again later
     # - The caller specifically asks for a full diff, which is useful during bid
     #   merge.
     if pa not in ([wctx, p2] + wctx.parents()) and not forcefulldiff:
         # Identify which files are relevant to the merge, so we can limit the
         # total m1-vs-m2 diff to just those files. This has significant
         # performance benefits in large repositories.
         relevantfiles = set(ma.diff(m2).keys())
 
         # For copied and moved files, we need to add the source file too.
         for copykey, copyvalue in pycompat.iteritems(branch_copies1.copy):
             if copyvalue in relevantfiles:
                 relevantfiles.add(copykey)
         for movedirkey in branch_copies1.movewithdir:
             relevantfiles.add(movedirkey)
         filesmatcher = scmutil.matchfiles(repo, relevantfiles)
         matcher = matchmod.intersectmatchers(matcher, filesmatcher)
 
     diff = m1.diff(m2, match=matcher)
 
     for f, ((n1, fl1), (n2, fl2)) in pycompat.iteritems(diff):
         if n1 and n2:  # file exists on both local and remote side
             if f not in ma:
                 # TODO: what if they're renamed from different sources?
                 fa = branch_copies1.copy.get(
                     f, None
                 ) or branch_copies2.copy.get(f, None)
                 args, msg = None, None
                 if fa is not None:
                     args = (f, f, fa, False, pa.node())
                     msg = b'both renamed from %s' % fa
                 else:
                     args = (f, f, None, False, pa.node())
                     msg = b'both created'
                 mresult.addfile(f, mergestatemod.ACTION_MERGE, args, msg)
             else:
                 a = ma[f]
                 fla = ma.flags(f)
                 nol = b'l' not in fl1 + fl2 + fla
                 if n2 == a and fl2 == fla:
                     mresult.addfile(
                         f, mergestatemod.ACTION_KEEP, (), b'remote unchanged',
                     )
                 elif n1 == a and fl1 == fla:  # local unchanged - use remote
                     if n1 == n2:  # optimization: keep local content
                         mresult.addfile(
                             f,
                             mergestatemod.ACTION_EXEC,
                             (fl2,),
                             b'update permissions',
                         )
                     else:
                         mresult.addfile(
                             f,
                             mergestatemod.ACTION_GET,
                             (fl2, False),
                             b'remote is newer',
                         )
                         if branchmerge:
                             mresult.addcommitinfo(
                                 f, b'filenode-source', b'other'
                             )
                 elif nol and n2 == a:  # remote only changed 'x'
                     mresult.addfile(
                         f,
                         mergestatemod.ACTION_EXEC,
                         (fl2,),
                         b'update permissions',
                     )
                 elif nol and n1 == a:  # local only changed 'x'
                     mresult.addfile(
                         f,
                         mergestatemod.ACTION_GET,
                         (fl1, False),
                         b'remote is newer',
                     )
                     if branchmerge:
                         mresult.addcommitinfo(f, b'filenode-source', b'other')
                 else:  # both changed something
                     mresult.addfile(
                         f,
                         mergestatemod.ACTION_MERGE,
                         (f, f, f, False, pa.node()),
                         b'versions differ',
                     )
         elif n1:  # file exists only on local side
             if f in copied2:
                 pass  # we'll deal with it on m2 side
             elif (
                 f in branch_copies1.movewithdir
             ):  # directory rename, move local
                 f2 = branch_copies1.movewithdir[f]
                 if f2 in m2:
                     mresult.addfile(
                         f2,
                         mergestatemod.ACTION_MERGE,
                         (f, f2, None, True, pa.node()),
                         b'remote directory rename, both created',
                     )
                 else:
                     mresult.addfile(
                         f2,
                         mergestatemod.ACTION_DIR_RENAME_MOVE_LOCAL,
                         (f, fl1),
                         b'remote directory rename - move from %s' % f,
                     )
             elif f in branch_copies1.copy:
                 f2 = branch_copies1.copy[f]
                 mresult.addfile(
                     f,
                     mergestatemod.ACTION_MERGE,
                     (f, f2, f2, False, pa.node()),
                     b'local copied/moved from %s' % f2,
                 )
             elif f in ma:  # clean, a different, no remote
                 if n1 != ma[f]:
                     if acceptremote:
                         mresult.addfile(
                             f,
                             mergestatemod.ACTION_REMOVE,
                             None,
                             b'remote delete',
                         )
                     else:
                         mresult.addfile(
                             f,
                             mergestatemod.ACTION_CHANGED_DELETED,
                             (f, None, f, False, pa.node()),
                             b'prompt changed/deleted',
                         )
                 elif n1 == addednodeid:
                     # This file was locally added. We should forget it instead of
                     # deleting it.
                     mresult.addfile(
                         f, mergestatemod.ACTION_FORGET, None, b'remote deleted',
                     )
                 else:
                     mresult.addfile(
                         f, mergestatemod.ACTION_REMOVE, None, b'other deleted',
                     )
         elif n2:  # file exists only on remote side
             if f in copied1:
                 pass  # we'll deal with it on m1 side
             elif f in branch_copies2.movewithdir:
                 f2 = branch_copies2.movewithdir[f]
                 if f2 in m1:
                     mresult.addfile(
                         f2,
                         mergestatemod.ACTION_MERGE,
                         (f2, f, None, False, pa.node()),
                         b'local directory rename, both created',
                     )
                 else:
                     mresult.addfile(
                         f2,
                         mergestatemod.ACTION_LOCAL_DIR_RENAME_GET,
                         (f, fl2),
                         b'local directory rename - get from %s' % f,
                     )
             elif f in branch_copies2.copy:
                 f2 = branch_copies2.copy[f]
                 msg, args = None, None
                 if f2 in m2:
                     args = (f2, f, f2, False, pa.node())
                     msg = b'remote copied from %s' % f2
                 else:
                     args = (f2, f, f2, True, pa.node())
                     msg = b'remote moved from %s' % f2
                 mresult.addfile(f, mergestatemod.ACTION_MERGE, args, msg)
             elif f not in ma:
                 # local unknown, remote created: the logic is described by the
                 # following table:
                 #
                 # force  branchmerge  different  |  action
                 #   n         *           *      |   create
                 #   y         n           *      |   create
                 #   y         y           n      |   create
                 #   y         y           y      |   merge
                 #
                 # Checking whether the files are different is expensive, so we
                 # don't do that when we can avoid it.
                 if not force:
                     mresult.addfile(
                         f,
                         mergestatemod.ACTION_CREATED,
                         (fl2,),
                         b'remote created',
                     )
                 elif not branchmerge:
                     mresult.addfile(
                         f,
                         mergestatemod.ACTION_CREATED,
                         (fl2,),
                         b'remote created',
                     )
                 else:
                     mresult.addfile(
                         f,
                         mergestatemod.ACTION_CREATED_MERGE,
                         (fl2, pa.node()),
                         b'remote created, get or merge',
                     )
             elif n2 != ma[f]:
                 df = None
                 for d in branch_copies1.dirmove:
                     if f.startswith(d):
                         # new file added in a directory that was moved
                         df = branch_copies1.dirmove[d] + f[len(d) :]
                         break
                 if df is not None and df in m1:
                     mresult.addfile(
                         df,
                         mergestatemod.ACTION_MERGE,
                         (df, f, f, False, pa.node()),
                         b'local directory rename - respect move '
                         b'from %s' % f,
                     )
                 elif acceptremote:
                     mresult.addfile(
                         f,
                         mergestatemod.ACTION_CREATED,
                         (fl2,),
                         b'remote recreating',
                     )
                 else:
                     mresult.addfile(
                         f,
                         mergestatemod.ACTION_DELETED_CHANGED,
                         (None, f, f, False, pa.node()),
                         b'prompt deleted/changed',
                     )
 
     if repo.ui.configbool(b'experimental', b'merge.checkpathconflicts'):
         # If we are merging, look for path conflicts.
         checkpathconflicts(repo, wctx, p2, mresult)
 
     narrowmatch = repo.narrowmatch()
     if not narrowmatch.always():
         # Updates "actions" in place
         _filternarrowactions(narrowmatch, branchmerge, mresult)
 
     renamedelete = branch_copies1.renamedelete
     renamedelete.update(branch_copies2.renamedelete)
 
     mresult.updatevalues(diverge, renamedelete)
     return mresult
 
 
 def _resolvetrivial(repo, wctx, mctx, ancestor, mresult):
     """Resolves false conflicts where the nodeid changed but the content
        remained the same."""
     # We force a copy of actions.items() because we're going to mutate
     # actions as we resolve trivial conflicts.
     for f in list(mresult.files((mergestatemod.ACTION_CHANGED_DELETED,))):
         if f in ancestor and not wctx[f].cmp(ancestor[f]):
             # local did change but ended up with same content
             mresult.addfile(
                 f, mergestatemod.ACTION_REMOVE, None, b'prompt same'
             )
 
     for f in list(mresult.files((mergestatemod.ACTION_DELETED_CHANGED,))):
         if f in ancestor and not mctx[f].cmp(ancestor[f]):
             # remote did change but ended up with same content
             mresult.removefile(f)  # don't get = keep local deleted
 
 
 def calculateupdates(
     repo,
     wctx,
     mctx,
     ancestors,
     branchmerge,
     force,
     acceptremote,
     followcopies,
     matcher=None,
     mergeforce=False,
 ):
     """
     Calculate the actions needed to merge mctx into wctx using ancestors
 
     Uses manifestmerge() to merge manifest and get list of actions required to
     perform for merging two manifests. If there are multiple ancestors, uses bid
     merge if enabled.
 
     Also filters out actions which are unrequired if repository is sparse.
 
     Returns mergeresult object same as manifestmerge().
     """
     # Avoid cycle.
     from . import sparse
 
     mresult = None
     if len(ancestors) == 1:  # default
         mresult = manifestmerge(
             repo,
             wctx,
             mctx,
             ancestors[0],
             branchmerge,
             force,
             matcher,
             acceptremote,
             followcopies,
         )
         _checkunknownfiles(repo, wctx, mctx, force, mresult, mergeforce)
 
     else:  # only when merge.preferancestor=* - the default
         repo.ui.note(
             _(b"note: merging %s and %s using bids from ancestors %s\n")
             % (
                 wctx,
                 mctx,
                 _(b' and ').join(pycompat.bytestr(anc) for anc in ancestors),
             )
         )
 
         # mapping filename to bids (action method to list af actions)
         # {FILENAME1 : BID1, FILENAME2 : BID2}
         # BID is another dictionary which contains
         # mapping of following form:
         # {ACTION_X : [info, ..], ACTION_Y : [info, ..]}
         fbids = {}
         diverge, renamedelete = None, None
         for ancestor in ancestors:
             repo.ui.note(_(b'\ncalculating bids for ancestor %s\n') % ancestor)
             mresult1 = manifestmerge(
                 repo,
                 wctx,
                 mctx,
                 ancestor,
                 branchmerge,
                 force,
                 matcher,
                 acceptremote,
                 followcopies,
                 forcefulldiff=True,
             )
             _checkunknownfiles(repo, wctx, mctx, force, mresult1, mergeforce)
 
             # Track the shortest set of warning on the theory that bid
             # merge will correctly incorporate more information
             if diverge is None or len(mresult1.diverge) < len(diverge):
                 diverge = mresult1.diverge
             if renamedelete is None or len(renamedelete) < len(
                 mresult1.renamedelete
             ):
                 renamedelete = mresult1.renamedelete
 
             for f, a in mresult1.filemap(sort=True):
                 m, args, msg = a
                 repo.ui.debug(b' %s: %s -> %s\n' % (f, msg, m))
                 if f in fbids:
                     d = fbids[f]
                     if m in d:
                         d[m].append(a)
                     else:
                         d[m] = [a]
                 else:
                     fbids[f] = {m: [a]}
 
         # Call for bids
         # Pick the best bid for each file
         repo.ui.note(
             _(b'\nauction for merging merge bids (%d ancestors)\n')
             % len(ancestors)
         )
         mresult = mergeresult()
         for f, bids in sorted(fbids.items()):
             if repo.ui.debugflag:
                 repo.ui.debug(b" list of bids for %s:\n" % f)
                 for m, l in sorted(bids.items()):
                     for _f, args, msg in l:
                         repo.ui.debug(b'   %s -> %s\n' % (msg, m))
             # bids is a mapping from action method to list af actions
             # Consensus?
             if len(bids) == 1:  # all bids are the same kind of method
                 m, l = list(bids.items())[0]
                 if all(a == l[0] for a in l[1:]):  # len(bids) is > 1
                     repo.ui.note(_(b" %s: consensus for %s\n") % (f, m))
                     mresult.addfile(f, *l[0])
                     continue
             # If keep is an option, just do it.
             if mergestatemod.ACTION_KEEP in bids:
                 repo.ui.note(_(b" %s: picking 'keep' action\n") % f)
                 mresult.addfile(f, *bids[mergestatemod.ACTION_KEEP][0])
                 continue
             # If there are gets and they all agree [how could they not?], do it.
             if mergestatemod.ACTION_GET in bids:
                 ga0 = bids[mergestatemod.ACTION_GET][0]
                 if all(a == ga0 for a in bids[mergestatemod.ACTION_GET][1:]):
                     repo.ui.note(_(b" %s: picking 'get' action\n") % f)
                     mresult.addfile(f, *ga0)
                     continue
             # TODO: Consider other simple actions such as mode changes
             # Handle inefficient democrazy.
             repo.ui.note(_(b' %s: multiple bids for merge action:\n') % f)
             for m, l in sorted(bids.items()):
                 for _f, args, msg in l:
                     repo.ui.note(b'  %s -> %s\n' % (msg, m))
             # Pick random action. TODO: Instead, prompt user when resolving
             m, l = list(bids.items())[0]
             repo.ui.warn(
                 _(b' %s: ambiguous merge - picked %s action\n') % (f, m)
             )
             mresult.addfile(f, *l[0])
             continue
         repo.ui.note(_(b'end of auction\n\n'))
         mresult.updatevalues(diverge, renamedelete)
 
     if wctx.rev() is None:
         _forgetremoved(wctx, mctx, branchmerge, mresult)
 
     sparse.filterupdatesactions(repo, wctx, mctx, branchmerge, mresult)
     _resolvetrivial(repo, wctx, mctx, ancestors[0], mresult)
 
     return mresult
 
 
 def _getcwd():
     try:
         return encoding.getcwd()
     except OSError as err:
         if err.errno == errno.ENOENT:
             return None
         raise
 
 
 def batchremove(repo, wctx, actions):
     """apply removes to the working directory
 
     yields tuples for progress updates
     """
     verbose = repo.ui.verbose
     cwd = _getcwd()
     i = 0
     for f, args, msg in actions:
         repo.ui.debug(b" %s: %s -> r\n" % (f, msg))
         if verbose:
             repo.ui.note(_(b"removing %s\n") % f)
         wctx[f].audit()
         try:
             wctx[f].remove(ignoremissing=True)
         except OSError as inst:
             repo.ui.warn(
                 _(b"update failed to remove %s: %s!\n") % (f, inst.strerror)
             )
         if i == 100:
             yield i, f
             i = 0
         i += 1
     if i > 0:
         yield i, f
 
     if cwd and not _getcwd():
         # cwd was removed in the course of removing files; print a helpful
         # warning.
         repo.ui.warn(
             _(
                 b"current directory was removed\n"
                 b"(consider changing to repo root: %s)\n"
             )
             % repo.root
         )
 
 
 def batchget(repo, mctx, wctx, wantfiledata, actions):
     """apply gets to the working directory
 
     mctx is the context to get from
 
     Yields arbitrarily many (False, tuple) for progress updates, followed by
     exactly one (True, filedata). When wantfiledata is false, filedata is an
     empty dict. When wantfiledata is true, filedata[f] is a triple (mode, size,
     mtime) of the file f written for each action.
     """
     filedata = {}
     verbose = repo.ui.verbose
     fctx = mctx.filectx
     ui = repo.ui
     i = 0
     with repo.wvfs.backgroundclosing(ui, expectedcount=len(actions)):
         for f, (flags, backup), msg in actions:
             repo.ui.debug(b" %s: %s -> g\n" % (f, msg))
             if verbose:
                 repo.ui.note(_(b"getting %s\n") % f)
 
             if backup:
                 # If a file or directory exists with the same name, back that
                 # up.  Otherwise, look to see if there is a file that conflicts
                 # with a directory this file is in, and if so, back that up.
                 conflicting = f
                 if not repo.wvfs.lexists(f):
                     for p in pathutil.finddirs(f):
                         if repo.wvfs.isfileorlink(p):
                             conflicting = p
                             break
                 if repo.wvfs.lexists(conflicting):
                     orig = scmutil.backuppath(ui, repo, conflicting)
                     util.rename(repo.wjoin(conflicting), orig)
             wfctx = wctx[f]
             wfctx.clearunknown()
             atomictemp = ui.configbool(b"experimental", b"update.atomic-file")
             size = wfctx.write(
                 fctx(f).data(),
                 flags,
                 backgroundclose=True,
                 atomictemp=atomictemp,
             )
             if wantfiledata:
                 s = wfctx.lstat()
                 mode = s.st_mode
                 mtime = s[stat.ST_MTIME]
                 filedata[f] = (mode, size, mtime)  # for dirstate.normal
             if i == 100:
                 yield False, (i, f)
                 i = 0
             i += 1
     if i > 0:
         yield False, (i, f)
     yield True, filedata
 
 
 def _prefetchfiles(repo, ctx, mresult):
     """Invoke ``scmutil.prefetchfiles()`` for the files relevant to the dict
     of merge actions.  ``ctx`` is the context being merged in."""
 
     # Skipping 'a', 'am', 'f', 'r', 'dm', 'e', 'k', 'p' and 'pr', because they
     # don't touch the context to be merged in.  'cd' is skipped, because
     # changed/deleted never resolves to something from the remote side.
     files = mresult.files(
         [
             mergestatemod.ACTION_GET,
             mergestatemod.ACTION_DELETED_CHANGED,
             mergestatemod.ACTION_LOCAL_DIR_RENAME_GET,
             mergestatemod.ACTION_MERGE,
         ]
     )
 
     prefetch = scmutil.prefetchfiles
     matchfiles = scmutil.matchfiles
     prefetch(
         repo, [(ctx.rev(), matchfiles(repo, files),)],
     )
 
 
 @attr.s(frozen=True)
 class updateresult(object):
     updatedcount = attr.ib()
     mergedcount = attr.ib()
     removedcount = attr.ib()
     unresolvedcount = attr.ib()
 
     def isempty(self):
         return not (
             self.updatedcount
             or self.mergedcount
             or self.removedcount
             or self.unresolvedcount
         )
 
 
 def applyupdates(
     repo, mresult, wctx, mctx, overwrite, wantfiledata, labels=None,
 ):
     """apply the merge action list to the working directory
 
     mresult is a mergeresult object representing result of the merge
     wctx is the working copy context
     mctx is the context to be merged into the working copy
 
     Return a tuple of (counts, filedata), where counts is a tuple
     (updated, merged, removed, unresolved) that describes how many
     files were affected by the update, and filedata is as described in
     batchget.
     """
 
     _prefetchfiles(repo, mctx, mresult)
 
     updated, merged, removed = 0, 0, 0
     ms = mergestatemod.mergestate.clean(
         repo, wctx.p1().node(), mctx.node(), labels
     )
 
     for f, op in pycompat.iteritems(mresult.commitinfo):
         # the other side of filenode was choosen while merging, store this in
         # mergestate so that it can be reused on commit
         ms.addcommitinfo(f, op)
 
     moves = []
 
     # 'cd' and 'dc' actions are treated like other merge conflicts
     mergeactions = list(
         mresult.getactions(
             [
                 mergestatemod.ACTION_CHANGED_DELETED,
                 mergestatemod.ACTION_DELETED_CHANGED,
                 mergestatemod.ACTION_MERGE,
             ],
             sort=True,
         )
     )
     for f, args, msg in mergeactions:
         f1, f2, fa, move, anc = args
         if f == b'.hgsubstate':  # merged internally
             continue
         if f1 is None:
             fcl = filemerge.absentfilectx(wctx, fa)
         else:
             repo.ui.debug(b" preserving %s for resolve of %s\n" % (f1, f))
             fcl = wctx[f1]
         if f2 is None:
             fco = filemerge.absentfilectx(mctx, fa)
         else:
             fco = mctx[f2]
         actx = repo[anc]
         if fa in actx:
             fca = actx[fa]
         else:
             # TODO: move to absentfilectx
             fca = repo.filectx(f1, fileid=nullrev)
         ms.add(fcl, fco, fca, f)
         if f1 != f and move:
             moves.append(f1)
 
     # remove renamed files after safely stored
     for f in moves:
         if wctx[f].lexists():
             repo.ui.debug(b"removing %s\n" % f)
             wctx[f].audit()
             wctx[f].remove()
 
     numupdates = mresult.len() - mresult.len((mergestatemod.ACTION_KEEP,))
     progress = repo.ui.makeprogress(
         _(b'updating'), unit=_(b'files'), total=numupdates
     )
 
     if b'.hgsubstate' in mresult._actionmapping[mergestatemod.ACTION_REMOVE]:
         subrepoutil.submerge(repo, wctx, mctx, wctx, overwrite, labels)
 
     # record path conflicts
     for f, args, msg in mresult.getactions(
         [mergestatemod.ACTION_PATH_CONFLICT], sort=True
     ):
         f1, fo = args
         s = repo.ui.status
         s(
             _(
                 b"%s: path conflict - a file or link has the same name as a "
                 b"directory\n"
             )
             % f
         )
         if fo == b'l':
             s(_(b"the local file has been renamed to %s\n") % f1)
         else:
             s(_(b"the remote file has been renamed to %s\n") % f1)
         s(_(b"resolve manually then use 'hg resolve --mark %s'\n") % f)
         ms.addpathconflict(f, f1, fo)
         progress.increment(item=f)
 
     # When merging in-memory, we can't support worker processes, so set the
     # per-item cost at 0 in that case.
     cost = 0 if wctx.isinmemory() else 0.001
 
     # remove in parallel (must come before resolving path conflicts and getting)
     prog = worker.worker(
         repo.ui,
         cost,
         batchremove,
         (repo, wctx),
         list(mresult.getactions([mergestatemod.ACTION_REMOVE], sort=True)),
     )
     for i, item in prog:
         progress.increment(step=i, item=item)
     removed = mresult.len((mergestatemod.ACTION_REMOVE,))
 
     # resolve path conflicts (must come before getting)
     for f, args, msg in mresult.getactions(
         [mergestatemod.ACTION_PATH_CONFLICT_RESOLVE], sort=True
     ):
         repo.ui.debug(b" %s: %s -> pr\n" % (f, msg))
         (f0, origf0) = args
         if wctx[f0].lexists():
             repo.ui.note(_(b"moving %s to %s\n") % (f0, f))
             wctx[f].audit()
             wctx[f].write(wctx.filectx(f0).data(), wctx.filectx(f0).flags())
             wctx[f0].remove()
         progress.increment(item=f)
 
     # get in parallel.
     threadsafe = repo.ui.configbool(
         b'experimental', b'worker.wdir-get-thread-safe'
     )
     prog = worker.worker(
         repo.ui,
         cost,
         batchget,
         (repo, mctx, wctx, wantfiledata),
         list(mresult.getactions([mergestatemod.ACTION_GET], sort=True)),
         threadsafe=threadsafe,
         hasretval=True,
     )
     getfiledata = {}
     for final, res in prog:
         if final:
             getfiledata = res
         else:
             i, item = res
             progress.increment(step=i, item=item)
 
     if b'.hgsubstate' in mresult._actionmapping[mergestatemod.ACTION_GET]:
         subrepoutil.submerge(repo, wctx, mctx, wctx, overwrite, labels)
 
     # forget (manifest only, just log it) (must come first)
     for f, args, msg in mresult.getactions(
         (mergestatemod.ACTION_FORGET,), sort=True
     ):
         repo.ui.debug(b" %s: %s -> f\n" % (f, msg))
         progress.increment(item=f)
 
     # re-add (manifest only, just log it)
     for f, args, msg in mresult.getactions(
         (mergestatemod.ACTION_ADD,), sort=True
     ):
         repo.ui.debug(b" %s: %s -> a\n" % (f, msg))
         progress.increment(item=f)
 
     # re-add/mark as modified (manifest only, just log it)
     for f, args, msg in mresult.getactions(
         (mergestatemod.ACTION_ADD_MODIFIED,), sort=True
     ):
         repo.ui.debug(b" %s: %s -> am\n" % (f, msg))
         progress.increment(item=f)
 
     # keep (noop, just log it)
     for f, args, msg in mresult.getactions(
         (mergestatemod.ACTION_KEEP,), sort=True
     ):
         repo.ui.debug(b" %s: %s -> k\n" % (f, msg))
         # no progress
 
     # directory rename, move local
     for f, args, msg in mresult.getactions(
         (mergestatemod.ACTION_DIR_RENAME_MOVE_LOCAL,), sort=True
     ):
         repo.ui.debug(b" %s: %s -> dm\n" % (f, msg))
         progress.increment(item=f)
         f0, flags = args
         repo.ui.note(_(b"moving %s to %s\n") % (f0, f))
         wctx[f].audit()
         wctx[f].write(wctx.filectx(f0).data(), flags)
         wctx[f0].remove()
 
     # local directory rename, get
     for f, args, msg in mresult.getactions(
         (mergestatemod.ACTION_LOCAL_DIR_RENAME_GET,), sort=True
     ):
         repo.ui.debug(b" %s: %s -> dg\n" % (f, msg))
         progress.increment(item=f)
         f0, flags = args
         repo.ui.note(_(b"getting %s to %s\n") % (f0, f))
         wctx[f].write(mctx.filectx(f0).data(), flags)
 
     # exec
     for f, args, msg in mresult.getactions(
         (mergestatemod.ACTION_EXEC,), sort=True
     ):
         repo.ui.debug(b" %s: %s -> e\n" % (f, msg))
         progress.increment(item=f)
         (flags,) = args
         wctx[f].audit()
         wctx[f].setflags(b'l' in flags, b'x' in flags)
 
     # these actions updates the file
     updated = mresult.len(
         (
             mergestatemod.ACTION_GET,
             mergestatemod.ACTION_EXEC,
             mergestatemod.ACTION_LOCAL_DIR_RENAME_GET,
             mergestatemod.ACTION_DIR_RENAME_MOVE_LOCAL,
         )
     )
     # the ordering is important here -- ms.mergedriver will raise if the merge
     # driver has changed, and we want to be able to bypass it when overwrite is
     # True
     usemergedriver = not overwrite and mergeactions and ms.mergedriver
 
     if usemergedriver:
         if wctx.isinmemory():
             raise error.InMemoryMergeConflictsError(
                 b"in-memory merge does not support mergedriver"
             )
         ms.commit()
         proceed = driverpreprocess(repo, ms, wctx, labels=labels)
         # the driver might leave some files unresolved
         unresolvedf = set(ms.unresolved())
         if not proceed:
             # XXX setting unresolved to at least 1 is a hack to make sure we
             # error out
             return updateresult(
                 updated, merged, removed, max(len(unresolvedf), 1)
             )
         newactions = []
         for f, args, msg in mergeactions:
             if f in unresolvedf:
                 newactions.append((f, args, msg))
         mergeactions = newactions
 
     try:
         # premerge
         tocomplete = []
         for f, args, msg in mergeactions:
             repo.ui.debug(b" %s: %s -> m (premerge)\n" % (f, msg))
             progress.increment(item=f)
             if f == b'.hgsubstate':  # subrepo states need updating
                 subrepoutil.submerge(
                     repo, wctx, mctx, wctx.ancestor(mctx), overwrite, labels
                 )
                 continue
             wctx[f].audit()
             complete, r = ms.preresolve(f, wctx)
             if not complete:
                 numupdates += 1
                 tocomplete.append((f, args, msg))
 
         # merge
         for f, args, msg in tocomplete:
             repo.ui.debug(b" %s: %s -> m (merge)\n" % (f, msg))
             progress.increment(item=f, total=numupdates)
             ms.resolve(f, wctx)
 
     finally:
         ms.commit()
 
     unresolved = ms.unresolvedcount()
 
     if (
         usemergedriver
         and not unresolved
         and ms.mdstate() != mergestatemod.MERGE_DRIVER_STATE_SUCCESS
     ):
         if not driverconclude(repo, ms, wctx, labels=labels):
             # XXX setting unresolved to at least 1 is a hack to make sure we
             # error out
             unresolved = max(unresolved, 1)
 
         ms.commit()
 
     msupdated, msmerged, msremoved = ms.counts()
     updated += msupdated
     merged += msmerged
     removed += msremoved
 
     extraactions = ms.actions()
     if extraactions:
         mfiles = {
             a[0] for a in mresult.getactions((mergestatemod.ACTION_MERGE,))
         }
         for k, acts in pycompat.iteritems(extraactions):
             for a in acts:
                 mresult.addfile(a[0], k, *a[1:])
             if k == mergestatemod.ACTION_GET and wantfiledata:
                 # no filedata until mergestate is updated to provide it
                 for a in acts:
                     getfiledata[a[0]] = None
             # Remove these files from actions[ACTION_MERGE] as well. This is
             # important because in recordupdates, files in actions[ACTION_MERGE]
             # are processed after files in other actions, and the merge driver
             # might add files to those actions via extraactions above. This can
             # lead to a file being recorded twice, with poor results. This is
             # especially problematic for actions[ACTION_REMOVE] (currently only
             # possible with the merge driver in the initial merge process;
             # interrupted merges don't go through this flow).
             #
             # The real fix here is to have indexes by both file and action so
             # that when the action for a file is changed it is automatically
             # reflected in the other action lists. But that involves a more
             # complex data structure, so this will do for now.
             #
             # We don't need to do the same operation for 'dc' and 'cd' because
             # those lists aren't consulted again.
             mfiles.difference_update(a[0] for a in acts)
 
         for a in list(mresult.getactions((mergestatemod.ACTION_MERGE,))):
             if a[0] not in mfiles:
                 mresult.removefile(a[0])
 
     progress.complete()
     assert len(getfiledata) == (
         mresult.len((mergestatemod.ACTION_GET,)) if wantfiledata else 0
     )
     return updateresult(updated, merged, removed, unresolved), getfiledata
 
 
 def _advertisefsmonitor(repo, num_gets, p1node):
     # Advertise fsmonitor when its presence could be useful.
     #
     # We only advertise when performing an update from an empty working
     # directory. This typically only occurs during initial clone.
     #
     # We give users a mechanism to disable the warning in case it is
     # annoying.
     #
     # We only allow on Linux and MacOS because that's where fsmonitor is
     # considered stable.
     fsmonitorwarning = repo.ui.configbool(b'fsmonitor', b'warn_when_unused')
     fsmonitorthreshold = repo.ui.configint(
         b'fsmonitor', b'warn_update_file_count'
     )
+    # avoid cycle dirstate -> sparse -> merge -> dirstate
+    from . import dirstate
+
+    if dirstate.rustmod is not None:
+        # When using rust status, fsmonitor becomes necessary at higher sizes
+        fsmonitorthreshold = repo.ui.configint(
+            b'fsmonitor', b'warn_update_file_count_rust',
+        )
+
     try:
         # avoid cycle: extensions -> cmdutil -> merge
         from . import extensions
 
         extensions.find(b'fsmonitor')
         fsmonitorenabled = repo.ui.config(b'fsmonitor', b'mode') != b'off'
         # We intentionally don't look at whether fsmonitor has disabled
         # itself because a) fsmonitor may have already printed a warning
         # b) we only care about the config state here.
     except KeyError:
         fsmonitorenabled = False
 
     if (
         fsmonitorwarning
         and not fsmonitorenabled
         and p1node == nullid
         and num_gets >= fsmonitorthreshold
         and pycompat.sysplatform.startswith((b'linux', b'darwin'))
     ):
         repo.ui.warn(
             _(
                 b'(warning: large working directory being used without '
                 b'fsmonitor enabled; enable fsmonitor to improve performance; '
                 b'see "hg help -e fsmonitor")\n'
             )
         )
 
 
 UPDATECHECK_ABORT = b'abort'  # handled at higher layers
 UPDATECHECK_NONE = b'none'
 UPDATECHECK_LINEAR = b'linear'
 UPDATECHECK_NO_CONFLICT = b'noconflict'
 
 
 def update(
     repo,
     node,
     branchmerge,
     force,
     ancestor=None,
     mergeancestor=False,
     labels=None,
     matcher=None,
     mergeforce=False,
     updatedirstate=True,
     updatecheck=None,
     wc=None,
 ):
     """
     Perform a merge between the working directory and the given node
 
     node = the node to update to
     branchmerge = whether to merge between branches
     force = whether to force branch merging or file overwriting
     matcher = a matcher to filter file lists (dirstate not updated)
     mergeancestor = whether it is merging with an ancestor. If true,
       we should accept the incoming changes for any prompts that occur.
       If false, merging with an ancestor (fast-forward) is only allowed
       between different named branches. This flag is used by rebase extension
       as a temporary fix and should be avoided in general.
     labels = labels to use for base, local and other
     mergeforce = whether the merge was run with 'merge --force' (deprecated): if
       this is True, then 'force' should be True as well.
 
     The table below shows all the behaviors of the update command given the
     -c/--check and -C/--clean or no options, whether the working directory is
     dirty, whether a revision is specified, and the relationship of the parent
     rev to the target rev (linear or not). Match from top first. The -n
     option doesn't exist on the command line, but represents the
     experimental.updatecheck=noconflict option.
 
     This logic is tested by test-update-branches.t.
 
     -c  -C  -n  -m  dirty  rev  linear  |  result
      y   y   *   *    *     *     *     |    (1)
      y   *   y   *    *     *     *     |    (1)
      y   *   *   y    *     *     *     |    (1)
      *   y   y   *    *     *     *     |    (1)
      *   y   *   y    *     *     *     |    (1)
      *   *   y   y    *     *     *     |    (1)
      *   *   *   *    *     n     n     |     x
      *   *   *   *    n     *     *     |    ok
      n   n   n   n    y     *     y     |   merge
      n   n   n   n    y     y     n     |    (2)
      n   n   n   y    y     *     *     |   merge
      n   n   y   n    y     *     *     |  merge if no conflict
      n   y   n   n    y     *     *     |  discard
      y   n   n   n    y     *     *     |    (3)
 
     x = can't happen
     * = don't-care
     1 = incompatible options (checked in commands.py)
     2 = abort: uncommitted changes (commit or update --clean to discard changes)
     3 = abort: uncommitted changes (checked in commands.py)
 
     The merge is performed inside ``wc``, a workingctx-like objects. It defaults
     to repo[None] if None is passed.
 
     Return the same tuple as applyupdates().
     """
     # Avoid cycle.
     from . import sparse
 
     # This function used to find the default destination if node was None, but
     # that's now in destutil.py.
     assert node is not None
     if not branchmerge and not force:
         # TODO: remove the default once all callers that pass branchmerge=False
         # and force=False pass a value for updatecheck. We may want to allow
         # updatecheck='abort' to better suppport some of these callers.
         if updatecheck is None:
             updatecheck = UPDATECHECK_LINEAR
         if updatecheck not in (
             UPDATECHECK_NONE,
             UPDATECHECK_LINEAR,
             UPDATECHECK_NO_CONFLICT,
         ):
             raise ValueError(
                 r'Invalid updatecheck %r (can accept %r)'
                 % (
                     updatecheck,
                     (
                         UPDATECHECK_NONE,
                         UPDATECHECK_LINEAR,
                         UPDATECHECK_NO_CONFLICT,
                     ),
                 )
             )
     if wc is not None and wc.isinmemory():
         maybe_wlock = util.nullcontextmanager()
     else:
         maybe_wlock = repo.wlock()
     with maybe_wlock:
         if wc is None:
             wc = repo[None]
         pl = wc.parents()
         p1 = pl[0]
         p2 = repo[node]
         if ancestor is not None:
             pas = [repo[ancestor]]
         else:
             if repo.ui.configlist(b'merge', b'preferancestor') == [b'*']:
                 cahs = repo.changelog.commonancestorsheads(p1.node(), p2.node())
                 pas = [repo[anc] for anc in (sorted(cahs) or [nullid])]
             else:
                 pas = [p1.ancestor(p2, warn=branchmerge)]
 
         fp1, fp2, xp1, xp2 = p1.node(), p2.node(), bytes(p1), bytes(p2)
 
         overwrite = force and not branchmerge
         ### check phase
         if not overwrite:
             if len(pl) > 1:
                 raise error.Abort(_(b"outstanding uncommitted merge"))
             ms = mergestatemod.mergestate.read(repo)
             if list(ms.unresolved()):
                 raise error.Abort(
                     _(b"outstanding merge conflicts"),
                     hint=_(b"use 'hg resolve' to resolve"),
                 )
         if branchmerge:
             if pas == [p2]:
                 raise error.Abort(
                     _(
                         b"merging with a working directory ancestor"
                         b" has no effect"
                     )
                 )
             elif pas == [p1]:
                 if not mergeancestor and wc.branch() == p2.branch():
                     raise error.Abort(
                         _(b"nothing to merge"),
                         hint=_(b"use 'hg update' or check 'hg heads'"),
                     )
             if not force and (wc.files() or wc.deleted()):
                 raise error.Abort(
                     _(b"uncommitted changes"),
                     hint=_(b"use 'hg status' to list changes"),
                 )
             if not wc.isinmemory():
                 for s in sorted(wc.substate):
                     wc.sub(s).bailifchanged()
 
         elif not overwrite:
             if p1 == p2:  # no-op update
                 # call the hooks and exit early
                 repo.hook(b'preupdate', throw=True, parent1=xp2, parent2=b'')
                 repo.hook(b'update', parent1=xp2, parent2=b'', error=0)
                 return updateresult(0, 0, 0, 0)
 
             if updatecheck == UPDATECHECK_LINEAR and pas not in (
                 [p1],
                 [p2],
             ):  # nonlinear
                 dirty = wc.dirty(missing=True)
                 if dirty:
                     # Branching is a bit strange to ensure we do the minimal
                     # amount of call to obsutil.foreground.
                     foreground = obsutil.foreground(repo, [p1.node()])
                     # note: the <node> variable contains a random identifier
                     if repo[node].node() in foreground:
                         pass  # allow updating to successors
                     else:
                         msg = _(b"uncommitted changes")
                         hint = _(b"commit or update --clean to discard changes")
                         raise error.UpdateAbort(msg, hint=hint)
                 else:
                     # Allow jumping branches if clean and specific rev given
                     pass
 
         if overwrite:
             pas = [wc]
         elif not branchmerge:
             pas = [p1]
 
         # deprecated config: merge.followcopies
         followcopies = repo.ui.configbool(b'merge', b'followcopies')
         if overwrite:
             followcopies = False
         elif not pas[0]:
             followcopies = False
         if not branchmerge and not wc.dirty(missing=True):
             followcopies = False
 
         ### calculate phase
         mresult = calculateupdates(
             repo,
             wc,
             p2,
             pas,
             branchmerge,
             force,
             mergeancestor,
             followcopies,
             matcher=matcher,
             mergeforce=mergeforce,
         )
 
         if updatecheck == UPDATECHECK_NO_CONFLICT:
             if mresult.hasconflicts():
                 msg = _(b"conflicting changes")
                 hint = _(b"commit or update --clean to discard changes")
                 raise error.Abort(msg, hint=hint)
 
         # Prompt and create actions. Most of this is in the resolve phase
         # already, but we can't handle .hgsubstate in filemerge or
         # subrepoutil.submerge yet so we have to keep prompting for it.
         vals = mresult.getfile(b'.hgsubstate')
         if vals:
             f = b'.hgsubstate'
             m, args, msg = vals
             prompts = filemerge.partextras(labels)
             prompts[b'f'] = f
             if m == mergestatemod.ACTION_CHANGED_DELETED:
                 if repo.ui.promptchoice(
                     _(
                         b"local%(l)s changed %(f)s which other%(o)s deleted\n"
                         b"use (c)hanged version or (d)elete?"
                         b"$$ &Changed $$ &Delete"
                     )
                     % prompts,
                     0,
                 ):
                     mresult.addfile(
                         f, mergestatemod.ACTION_REMOVE, None, b'prompt delete',
                     )
                 elif f in p1:
                     mresult.addfile(
                         f,
                         mergestatemod.ACTION_ADD_MODIFIED,
                         None,
                         b'prompt keep',
                     )
                 else:
                     mresult.addfile(
                         f, mergestatemod.ACTION_ADD, None, b'prompt keep',
                     )
             elif m == mergestatemod.ACTION_DELETED_CHANGED:
                 f1, f2, fa, move, anc = args
                 flags = p2[f2].flags()
                 if (
                     repo.ui.promptchoice(
                         _(
                             b"other%(o)s changed %(f)s which local%(l)s deleted\n"
                             b"use (c)hanged version or leave (d)eleted?"
                             b"$$ &Changed $$ &Deleted"
                         )
                         % prompts,
                         0,
                     )
                     == 0
                 ):
                     mresult.addfile(
                         f,
                         mergestatemod.ACTION_GET,
                         (flags, False),
                         b'prompt recreating',
                     )
                 else:
                     mresult.removefile(f)
 
         if not util.fscasesensitive(repo.path):
             # check collision between files only in p2 for clean update
             if not branchmerge and (
                 force or not wc.dirty(missing=True, branch=False)
             ):
                 _checkcollision(repo, p2.manifest(), None)
             else:
                 _checkcollision(repo, wc.manifest(), mresult)
 
         # divergent renames
         for f, fl in sorted(pycompat.iteritems(mresult.diverge)):
             repo.ui.warn(
                 _(
                     b"note: possible conflict - %s was renamed "
                     b"multiple times to:\n"
                 )
                 % f
             )
             for nf in sorted(fl):
                 repo.ui.warn(b" %s\n" % nf)
 
         # rename and delete
         for f, fl in sorted(pycompat.iteritems(mresult.renamedelete)):
             repo.ui.warn(
                 _(
                     b"note: possible conflict - %s was deleted "
                     b"and renamed to:\n"
                 )
                 % f
             )
             for nf in sorted(fl):
                 repo.ui.warn(b" %s\n" % nf)
 
         ### apply phase
         if not branchmerge:  # just jump to the new rev
             fp1, fp2, xp1, xp2 = fp2, nullid, xp2, b''
         # If we're doing a partial update, we need to skip updating
         # the dirstate.
         always = matcher is None or matcher.always()
         updatedirstate = updatedirstate and always and not wc.isinmemory()
         if updatedirstate:
             repo.hook(b'preupdate', throw=True, parent1=xp1, parent2=xp2)
             # note that we're in the middle of an update
             repo.vfs.write(b'updatestate', p2.hex())
 
         _advertisefsmonitor(
             repo, mresult.len((mergestatemod.ACTION_GET,)), p1.node()
         )
 
         wantfiledata = updatedirstate and not branchmerge
         stats, getfiledata = applyupdates(
             repo, mresult, wc, p2, overwrite, wantfiledata, labels=labels,
         )
 
         if updatedirstate:
             with repo.dirstate.parentchange():
                 repo.setparents(fp1, fp2)
                 mergestatemod.recordupdates(
                     repo, mresult.actionsdict, branchmerge, getfiledata
                 )
                 # update completed, clear state
                 util.unlink(repo.vfs.join(b'updatestate'))
 
                 if not branchmerge:
                     repo.dirstate.setbranch(p2.branch())
 
     # If we're updating to a location, clean up any stale temporary includes
     # (ex: this happens during hg rebase --abort).
     if not branchmerge:
         sparse.prunetemporaryincludes(repo)
 
     if updatedirstate:
         repo.hook(
             b'update', parent1=xp1, parent2=xp2, error=stats.unresolvedcount
         )
     return stats
 
 
 def merge(ctx, labels=None, force=False, wc=None):
     """Merge another topological branch into the working copy.
 
     force = whether the merge was run with 'merge --force' (deprecated)
     """
 
     return update(
         ctx.repo(),
         ctx.rev(),
         labels=labels,
         branchmerge=True,
         force=force,
         mergeforce=force,
         wc=wc,
     )
 
 
 def clean_update(ctx, wc=None):
     """Do a clean update to the given commit.
 
     This involves updating to the commit and discarding any changes in the
     working copy.
     """
     return update(ctx.repo(), ctx.rev(), branchmerge=False, force=True, wc=wc)
 
 
 def revert_to(ctx, matcher=None, wc=None):
     """Revert the working copy to the given commit.
 
     The working copy will keep its current parent(s) but its content will
     be the same as in the given commit.
     """
 
     return update(
         ctx.repo(),
         ctx.rev(),
         branchmerge=False,
         force=True,
         updatedirstate=False,
         matcher=matcher,
         wc=wc,
     )
 
 
 def graft(
     repo,
     ctx,
     base=None,
     labels=None,
     keepparent=False,
     keepconflictparent=False,
     wctx=None,
 ):
     """Do a graft-like merge.
 
     This is a merge where the merge ancestor is chosen such that one
     or more changesets are grafted onto the current changeset. In
     addition to the merge, this fixes up the dirstate to include only
     a single parent (if keepparent is False) and tries to duplicate any
     renames/copies appropriately.
 
     ctx - changeset to rebase
     base - merge base, or ctx.p1() if not specified
     labels - merge labels eg ['local', 'graft']
     keepparent - keep second parent if any
     keepconflictparent - if unresolved, keep parent used for the merge
 
     """
     # If we're grafting a descendant onto an ancestor, be sure to pass
     # mergeancestor=True to update. This does two things: 1) allows the merge if
     # the destination is the same as the parent of the ctx (so we can use graft
     # to copy commits), and 2) informs update that the incoming changes are
     # newer than the destination so it doesn't prompt about "remote changed foo
     # which local deleted".
     # We also pass mergeancestor=True when base is the same revision as p1. 2)
     # doesn't matter as there can't possibly be conflicts, but 1) is necessary.
     wctx = wctx or repo[None]
     pctx = wctx.p1()
     base = base or ctx.p1()
     mergeancestor = (
         repo.changelog.isancestor(pctx.node(), ctx.node())
         or pctx.rev() == base.rev()
     )
 
     stats = update(
         repo,
         ctx.node(),
         True,
         True,
         base.node(),
         mergeancestor=mergeancestor,
         labels=labels,
         wc=wctx,
     )
 
     if keepconflictparent and stats.unresolvedcount:
         pother = ctx.node()
     else:
         pother = nullid
         parents = ctx.parents()
         if keepparent and len(parents) == 2 and base in parents:
             parents.remove(base)
             pother = parents[0].node()
     # Never set both parents equal to each other
     if pother == pctx.node():
         pother = nullid
 
     if wctx.isinmemory():
         wctx.setparents(pctx.node(), pother)
         # fix up dirstate for copies and renames
         copies.graftcopies(wctx, ctx, base)
     else:
         with repo.dirstate.parentchange():
             repo.setparents(pctx.node(), pother)
             repo.dirstate.write(repo.currenttransaction())
             # fix up dirstate for copies and renames
             copies.graftcopies(wctx, ctx, base)
     return stats
 
 
 def purge(
     repo,
     matcher,
     unknown=True,
     ignored=False,
     removeemptydirs=True,
     removefiles=True,
     abortonerror=False,
     noop=False,
 ):
     """Purge the working directory of untracked files.
 
     ``matcher`` is a matcher configured to scan the working directory -
     potentially a subset.
 
     ``unknown`` controls whether unknown files should be purged.
 
     ``ignored`` controls whether ignored files should be purged.
 
     ``removeemptydirs`` controls whether empty directories should be removed.
 
     ``removefiles`` controls whether files are removed.
 
     ``abortonerror`` causes an exception to be raised if an error occurs
     deleting a file or directory.
 
     ``noop`` controls whether to actually remove files. If not defined, actions
     will be taken.
 
     Returns an iterable of relative paths in the working directory that were
     or would be removed.
     """
 
     def remove(removefn, path):
         try:
             removefn(path)
         except OSError:
             m = _(b'%s cannot be removed') % path
             if abortonerror:
                 raise error.Abort(m)
             else:
                 repo.ui.warn(_(b'warning: %s\n') % m)
 
     # There's no API to copy a matcher. So mutate the passed matcher and
     # restore it when we're done.
     oldtraversedir = matcher.traversedir
 
     res = []
 
     try:
         if removeemptydirs:
             directories = []
             matcher.traversedir = directories.append
 
         status = repo.status(match=matcher, ignored=ignored, unknown=unknown)
 
         if removefiles:
             for f in sorted(status.unknown + status.ignored):
                 if not noop:
                     repo.ui.note(_(b'removing file %s\n') % f)
                     remove(repo.wvfs.unlink, f)
                 res.append(f)
 
         if removeemptydirs:
             for f in sorted(directories, reverse=True):
                 if matcher(f) and not repo.wvfs.listdir(f):
                     if not noop:
                         repo.ui.note(_(b'removing directory %s\n') % f)
                         remove(repo.wvfs.rmdir, f)
                     res.append(f)
 
         return res
 
     finally:
         matcher.traversedir = oldtraversedir

tests/test-clone.t

@@ -1,1308 +1,1309 b''
 #testcases sshv1 sshv2
 
 #if sshv2
   $ cat >> $HGRCPATH << EOF
   > [experimental]
   > sshpeer.advertise-v2 = true
   > sshserver.support-v2 = true
   > EOF
 #endif
 
 Prepare repo a:
 
   $ hg init a
   $ cd a
   $ echo a > a
   $ hg add a
   $ hg commit -m test
   $ echo first line > b
   $ hg add b
 
 Create a non-inlined filelog:
 
   $ "$PYTHON" -c 'open("data1", "wb").write(b"".join(b"%d\n" % x for x in range(10000)))'
   $ for j in 0 1 2 3 4 5 6 7 8 9; do
   >   cat data1 >> b
   >   hg commit -m test
   > done
 
 List files in store/data (should show a 'b.d'):
 
 #if reporevlogstore
   $ for i in .hg/store/data/*; do
   >   echo $i
   > done
   .hg/store/data/a.i
   .hg/store/data/b.d
   .hg/store/data/b.i
 #endif
 
 Trigger branchcache creation:
 
   $ hg branches
   default                       10:a7949464abda
   $ ls .hg/cache
   branch2-served
   rbc-names-v1
   rbc-revs-v1
 
 Default operation:
 
   $ hg clone . ../b
   updating to branch default
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cd ../b
 
 Ensure branchcache got copied over:
 
   $ ls .hg/cache
   branch2-served
   rbc-names-v1
   rbc-revs-v1
 
   $ cat a
   a
   $ hg verify
   checking changesets
   checking manifests
   crosschecking files in changesets and manifests
   checking files
   checked 11 changesets with 11 changes to 2 files
 
 Invalid dest '' must abort:
 
   $ hg clone . ''
   abort: empty destination path is not valid
   [255]
 
 No update, with debug option:
 
 #if hardlink
   $ hg --debug clone -U . ../c --config progress.debug=true
   linking: 1 files
   linking: 2 files
   linking: 3 files
   linking: 4 files
   linking: 5 files
   linking: 6 files
   linking: 7 files
   linking: 8 files
   linked 8 files (reporevlogstore !)
   linking: 9 files (reposimplestore !)
   linking: 10 files (reposimplestore !)
   linking: 11 files (reposimplestore !)
   linking: 12 files (reposimplestore !)
   linking: 13 files (reposimplestore !)
   linking: 14 files (reposimplestore !)
   linking: 15 files (reposimplestore !)
   linking: 16 files (reposimplestore !)
   linking: 17 files (reposimplestore !)
   linking: 18 files (reposimplestore !)
   linked 18 files (reposimplestore !)
 #else
   $ hg --debug clone -U . ../c --config progress.debug=true
   linking: 1 files
   copying: 2 files
   copying: 3 files
   copying: 4 files
   copying: 5 files
   copying: 6 files
   copying: 7 files
   copying: 8 files
   copied 8 files (reporevlogstore !)
   copying: 9 files (reposimplestore !)
   copying: 10 files (reposimplestore !)
   copying: 11 files (reposimplestore !)
   copying: 12 files (reposimplestore !)
   copying: 13 files (reposimplestore !)
   copying: 14 files (reposimplestore !)
   copying: 15 files (reposimplestore !)
   copying: 16 files (reposimplestore !)
   copying: 17 files (reposimplestore !)
   copying: 18 files (reposimplestore !)
   copied 18 files (reposimplestore !)
 #endif
   $ cd ../c
 
 Ensure branchcache got copied over:
 
   $ ls .hg/cache
   branch2-served
   rbc-names-v1
   rbc-revs-v1
 
   $ cat a 2>/dev/null || echo "a not present"
   a not present
   $ hg verify
   checking changesets
   checking manifests
   crosschecking files in changesets and manifests
   checking files
   checked 11 changesets with 11 changes to 2 files
 
 Default destination:
 
   $ mkdir ../d
   $ cd ../d
   $ hg clone ../a
   destination directory: a
   updating to branch default
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cd a
   $ hg cat a
   a
   $ cd ../..
 
 Check that we drop the 'file:' from the path before writing the .hgrc:
 
   $ hg clone file:a e
   updating to branch default
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ grep 'file:' e/.hg/hgrc
   [1]
 
 Check that path aliases are expanded:
 
   $ hg clone -q -U --config 'paths.foobar=a#0' foobar f
   $ hg -R f showconfig paths.default
   $TESTTMP/a#0
 
 Use --pull:
 
   $ hg clone --pull a g
   requesting all changes
   adding changesets
   adding manifests
   adding file changes
   added 11 changesets with 11 changes to 2 files
   new changesets acb14030fe0a:a7949464abda
   updating to branch default
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg -R g verify
   checking changesets
   checking manifests
   crosschecking files in changesets and manifests
   checking files
   checked 11 changesets with 11 changes to 2 files
 
 Invalid dest '' with --pull must abort (issue2528):
 
   $ hg clone --pull a ''
   abort: empty destination path is not valid
   [255]
 
 Clone to '.':
 
   $ mkdir h
   $ cd h
   $ hg clone ../a .
   updating to branch default
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cd ..
 
 
 *** Tests for option -u ***
 
 Adding some more history to repo a:
 
   $ cd a
   $ hg tag ref1
   $ echo the quick brown fox >a
   $ hg ci -m "hacked default"
   $ hg up ref1
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ hg branch stable
   marked working directory as branch stable
   (branches are permanent and global, did you want a bookmark?)
   $ echo some text >a
   $ hg ci -m "starting branch stable"
   $ hg tag ref2
   $ echo some more text >a
   $ hg ci -m "another change for branch stable"
   $ hg up ref2
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ hg parents
   changeset:   13:e8ece76546a6
   branch:      stable
   tag:         ref2
   parent:      10:a7949464abda
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     starting branch stable
   
 
 Repo a has two heads:
 
   $ hg heads
   changeset:   15:0aae7cf88f0d
   branch:      stable
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     another change for branch stable
   
   changeset:   12:f21241060d6a
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     hacked default
   
 
   $ cd ..
 
 
 Testing --noupdate with --updaterev (must abort):
 
   $ hg clone --noupdate --updaterev 1 a ua
   abort: cannot specify both --noupdate and --updaterev
   [255]
 
 
 Testing clone -u:
 
   $ hg clone -u . a ua
   updating to branch stable
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 Repo ua has both heads:
 
   $ hg -R ua heads
   changeset:   15:0aae7cf88f0d
   branch:      stable
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     another change for branch stable
   
   changeset:   12:f21241060d6a
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     hacked default
   
 
 Same revision checked out in repo a and ua:
 
   $ hg -R a parents --template "{node|short}\n"
   e8ece76546a6
   $ hg -R ua parents --template "{node|short}\n"
   e8ece76546a6
 
   $ rm -r ua
 
 
 Testing clone --pull -u:
 
   $ hg clone --pull -u . a ua
   requesting all changes
   adding changesets
   adding manifests
   adding file changes
   added 16 changesets with 16 changes to 3 files (+1 heads)
   new changesets acb14030fe0a:0aae7cf88f0d
   updating to branch stable
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 Repo ua has both heads:
 
   $ hg -R ua heads
   changeset:   15:0aae7cf88f0d
   branch:      stable
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     another change for branch stable
   
   changeset:   12:f21241060d6a
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     hacked default
   
 
 Same revision checked out in repo a and ua:
 
   $ hg -R a parents --template "{node|short}\n"
   e8ece76546a6
   $ hg -R ua parents --template "{node|short}\n"
   e8ece76546a6
 
   $ rm -r ua
 
 
 Testing clone -u <branch>:
 
   $ hg clone -u stable a ua
   updating to branch stable
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 Repo ua has both heads:
 
   $ hg -R ua heads
   changeset:   15:0aae7cf88f0d
   branch:      stable
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     another change for branch stable
   
   changeset:   12:f21241060d6a
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     hacked default
   
 
 Branch 'stable' is checked out:
 
   $ hg -R ua parents
   changeset:   15:0aae7cf88f0d
   branch:      stable
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     another change for branch stable
   
 
   $ rm -r ua
 
 
 Testing default checkout:
 
   $ hg clone a ua
   updating to branch default
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 Repo ua has both heads:
 
   $ hg -R ua heads
   changeset:   15:0aae7cf88f0d
   branch:      stable
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     another change for branch stable
   
   changeset:   12:f21241060d6a
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     hacked default
   
 
 Branch 'default' is checked out:
 
   $ hg -R ua parents
   changeset:   12:f21241060d6a
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     hacked default
   
 Test clone with a branch named "@" (issue3677)
 
   $ hg -R ua branch @
   marked working directory as branch @
   $ hg -R ua commit -m 'created branch @'
   $ hg clone ua atbranch
   updating to branch default
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg -R atbranch heads
   changeset:   16:798b6d97153e
   branch:      @
   tag:         tip
   parent:      12:f21241060d6a
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     created branch @
   
   changeset:   15:0aae7cf88f0d
   branch:      stable
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     another change for branch stable
   
   changeset:   12:f21241060d6a
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     hacked default
   
   $ hg -R atbranch parents
   changeset:   12:f21241060d6a
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     hacked default
   
 
   $ rm -r ua atbranch
 
 
 Testing #<branch>:
 
   $ hg clone -u . a#stable ua
   adding changesets
   adding manifests
   adding file changes
   added 14 changesets with 14 changes to 3 files
   new changesets acb14030fe0a:0aae7cf88f0d
   updating to branch stable
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 Repo ua has branch 'stable' and 'default' (was changed in fd511e9eeea6):
 
   $ hg -R ua heads
   changeset:   13:0aae7cf88f0d
   branch:      stable
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     another change for branch stable
   
   changeset:   10:a7949464abda
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     test
   
 
 Same revision checked out in repo a and ua:
 
   $ hg -R a parents --template "{node|short}\n"
   e8ece76546a6
   $ hg -R ua parents --template "{node|short}\n"
   e8ece76546a6
 
   $ rm -r ua
 
 
 Testing -u -r <branch>:
 
   $ hg clone -u . -r stable a ua
   adding changesets
   adding manifests
   adding file changes
   added 14 changesets with 14 changes to 3 files
   new changesets acb14030fe0a:0aae7cf88f0d
   updating to branch stable
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 Repo ua has branch 'stable' and 'default' (was changed in fd511e9eeea6):
 
   $ hg -R ua heads
   changeset:   13:0aae7cf88f0d
   branch:      stable
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     another change for branch stable
   
   changeset:   10:a7949464abda
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     test
   
 
 Same revision checked out in repo a and ua:
 
   $ hg -R a parents --template "{node|short}\n"
   e8ece76546a6
   $ hg -R ua parents --template "{node|short}\n"
   e8ece76546a6
 
   $ rm -r ua
 
 
 Testing -r <branch>:
 
   $ hg clone -r stable a ua
   adding changesets
   adding manifests
   adding file changes
   added 14 changesets with 14 changes to 3 files
   new changesets acb14030fe0a:0aae7cf88f0d
   updating to branch stable
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 Repo ua has branch 'stable' and 'default' (was changed in fd511e9eeea6):
 
   $ hg -R ua heads
   changeset:   13:0aae7cf88f0d
   branch:      stable
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     another change for branch stable
   
   changeset:   10:a7949464abda
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     test
   
 
 Branch 'stable' is checked out:
 
   $ hg -R ua parents
   changeset:   13:0aae7cf88f0d
   branch:      stable
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     another change for branch stable
   
 
   $ rm -r ua
 
 
 Issue2267: Error in 1.6 hg.py: TypeError: 'NoneType' object is not
 iterable in addbranchrevs()
 
   $ cat <<EOF > simpleclone.py
   > from mercurial import hg, ui as uimod
   > myui = uimod.ui.load()
   > repo = hg.repository(myui, b'a')
   > hg.clone(myui, {}, repo, dest=b"ua")
   > EOF
 
   $ "$PYTHON" simpleclone.py
   updating to branch default
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
   $ rm -r ua
 
   $ cat <<EOF > branchclone.py
   > from mercurial import extensions, hg, ui as uimod
   > myui = uimod.ui.load()
   > extensions.loadall(myui)
   > extensions.populateui(myui)
   > repo = hg.repository(myui, b'a')
   > hg.clone(myui, {}, repo, dest=b"ua", branch=[b"stable"])
   > EOF
 
   $ "$PYTHON" branchclone.py
   adding changesets
   adding manifests
   adding file changes
   added 14 changesets with 14 changes to 3 files
   new changesets acb14030fe0a:0aae7cf88f0d
   updating to branch stable
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ rm -r ua
 
 
 Test clone with special '@' bookmark:
   $ cd a
   $ hg bookmark -r a7949464abda @  # branch point of stable from default
   $ hg clone . ../i
   updating to bookmark @
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg id -i ../i
   a7949464abda
   $ rm -r ../i
 
   $ hg bookmark -f -r stable @
   $ hg bookmarks
      @                         15:0aae7cf88f0d
   $ hg clone . ../i
   updating to bookmark @ on branch stable
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg id -i ../i
   0aae7cf88f0d
   $ cd "$TESTTMP"
 
 
 Testing failures:
 
   $ mkdir fail
   $ cd fail
 
 No local source
 
   $ hg clone a b
   abort: repository a not found!
   [255]
 
 Invalid URL
 
   $ hg clone http://invalid:url/a b
   abort: error: nonnumeric port: 'url'
   [255]
 
 No remote source
 
 #if windows
   $ hg clone http://$LOCALIP:3121/a b
   abort: error: * (glob)
   [255]
 #else
   $ hg clone http://$LOCALIP:3121/a b
   abort: error: *refused* (glob)
   [255]
 #endif
   $ rm -rf b # work around bug with http clone
 
 
 #if unix-permissions no-root
 
 Inaccessible source
 
   $ mkdir a
   $ chmod 000 a
   $ hg clone a b
   abort: Permission denied: *$TESTTMP/fail/a/.hg* (glob)
   [255]
 
 Inaccessible destination
 
   $ hg init b
   $ cd b
   $ hg clone . ../a
   abort: Permission denied: *../a* (glob)
   [255]
   $ cd ..
   $ chmod 700 a
   $ rm -r a b
 
 #endif
 
 
 #if fifo
 
 Source of wrong type
 
   $ mkfifo a
   $ hg clone a b
   abort: $ENOTDIR$: *$TESTTMP/fail/a/.hg* (glob)
   [255]
   $ rm a
 
 #endif
 
 Default destination, same directory
 
   $ hg init q
   $ hg clone q
   destination directory: q
   abort: destination 'q' is not empty
   [255]
 
 destination directory not empty
 
   $ mkdir a
   $ echo stuff > a/a
   $ hg clone q a
   abort: destination 'a' is not empty
   [255]
 
 
 #if unix-permissions no-root
 
 leave existing directory in place after clone failure
 
   $ hg init c
   $ cd c
   $ echo c > c
   $ hg commit -A -m test
   adding c
   $ chmod -rx .hg/store/data
   $ cd ..
   $ mkdir d
   $ hg clone c d 2> err
   [255]
   $ test -d d
   $ test -d d/.hg
   [1]
 
 re-enable perm to allow deletion
 
   $ chmod +rx c/.hg/store/data
 
 #endif
 
   $ cd ..
 
 Test clone from the repository in (emulated) revlog format 0 (issue4203):
 
   $ mkdir issue4203
   $ mkdir -p src/.hg
   $ echo foo > src/foo
   $ hg -R src add src/foo
   $ hg -R src commit -m '#0'
   $ hg -R src log -q
   0:e1bab28bca43
   $ hg -R src debugrevlog -c | egrep 'format|flags'
   format : 0
   flags  : (none)
   $ hg root -R src -T json | sed 's|\\\\|\\|g'
   [
    {
     "hgpath": "$TESTTMP/src/.hg",
     "reporoot": "$TESTTMP/src",
     "storepath": "$TESTTMP/src/.hg"
    }
   ]
   $ hg clone -U -q src dst
   $ hg -R dst log -q
   0:e1bab28bca43
 
 Create repositories to test auto sharing functionality
 
   $ cat >> $HGRCPATH << EOF
   > [extensions]
   > share=
   > EOF
 
   $ hg init empty
   $ hg init source1a
   $ cd source1a
   $ echo initial1 > foo
   $ hg -q commit -A -m initial
   $ echo second > foo
   $ hg commit -m second
   $ cd ..
 
   $ hg init filteredrev0
   $ cd filteredrev0
   $ cat >> .hg/hgrc << EOF
   > [experimental]
   > evolution.createmarkers=True
   > EOF
   $ echo initial1 > foo
   $ hg -q commit -A -m initial0
   $ hg -q up -r null
   $ echo initial2 > foo
   $ hg -q commit -A -m initial1
   $ hg debugobsolete c05d5c47a5cf81401869999f3d05f7d699d2b29a e082c1832e09a7d1e78b7fd49a592d372de854c8
   1 new obsolescence markers
   obsoleted 1 changesets
   $ cd ..
 
   $ hg -q clone --pull source1a source1b
   $ cd source1a
   $ hg bookmark bookA
   $ echo 1a > foo
   $ hg commit -m 1a
   $ cd ../source1b
   $ hg -q up -r 0
   $ echo head1 > foo
   $ hg commit -m head1
   created new head
   $ hg bookmark head1
   $ hg -q up -r 0
   $ echo head2 > foo
   $ hg commit -m head2
   created new head
   $ hg bookmark head2
   $ hg -q up -r 0
   $ hg branch branch1
   marked working directory as branch branch1
   (branches are permanent and global, did you want a bookmark?)
   $ echo branch1 > foo
   $ hg commit -m branch1
   $ hg -q up -r 0
   $ hg branch branch2
   marked working directory as branch branch2
   $ echo branch2 > foo
   $ hg commit -m branch2
   $ cd ..
   $ hg init source2
   $ cd source2
   $ echo initial2 > foo
   $ hg -q commit -A -m initial2
   $ echo second > foo
   $ hg commit -m second
   $ cd ..
 
 Clone with auto share from an empty repo should not result in share
 
   $ mkdir share
   $ hg --config share.pool=share clone empty share-empty
   (not using pooled storage: remote appears to be empty)
   updating to branch default
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ ls share
   $ test -d share-empty/.hg/store
   $ test -f share-empty/.hg/sharedpath
   [1]
 
 Clone with auto share from a repo with filtered revision 0 should not result in share
 
   $ hg --config share.pool=share clone filteredrev0 share-filtered
   (not using pooled storage: unable to resolve identity of remote)
   requesting all changes
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files
   new changesets e082c1832e09
   updating to branch default
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 Clone from repo with content should result in shared store being created
 
   $ hg --config share.pool=share clone source1a share-dest1a
   (sharing from new pooled repository b5f04eac9d8f7a6a9fcb070243cccea7dc5ea0c1)
   requesting all changes
   adding changesets
   adding manifests
   adding file changes
   added 3 changesets with 3 changes to 1 files
   new changesets b5f04eac9d8f:e5bfe23c0b47
   searching for changes
   no changes found
   adding remote bookmark bookA
   updating working directory
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 The shared repo should have been created
 
   $ ls share
   b5f04eac9d8f7a6a9fcb070243cccea7dc5ea0c1
 
 The destination should point to it
 
   $ cat share-dest1a/.hg/sharedpath; echo
   $TESTTMP/share/b5f04eac9d8f7a6a9fcb070243cccea7dc5ea0c1/.hg
 
 The destination should have bookmarks
 
   $ hg -R share-dest1a bookmarks
      bookA                     2:e5bfe23c0b47
 
 The default path should be the remote, not the share
 
   $ hg -R share-dest1a config paths.default
   $TESTTMP/source1a
 
 Clone with existing share dir should result in pull + share
 
   $ hg --config share.pool=share clone source1b share-dest1b
   (sharing from existing pooled repository b5f04eac9d8f7a6a9fcb070243cccea7dc5ea0c1)
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   adding remote bookmark head1
   adding remote bookmark head2
   added 4 changesets with 4 changes to 1 files (+4 heads)
   new changesets 4a8dc1ab4c13:6bacf4683960
   updating working directory
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
   $ ls share
   b5f04eac9d8f7a6a9fcb070243cccea7dc5ea0c1
 
   $ cat share-dest1b/.hg/sharedpath; echo
   $TESTTMP/share/b5f04eac9d8f7a6a9fcb070243cccea7dc5ea0c1/.hg
 
 We only get bookmarks from the remote, not everything in the share
 
   $ hg -R share-dest1b bookmarks
      head1                     3:4a8dc1ab4c13
      head2                     4:99f71071f117
 
 Default path should be source, not share.
 
   $ hg -R share-dest1b config paths.default
   $TESTTMP/source1b
 
 Checked out revision should be head of default branch
 
   $ hg -R share-dest1b log -r .
   changeset:   4:99f71071f117
   bookmark:    head2
   parent:      0:b5f04eac9d8f
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     head2
   
 
 Clone from unrelated repo should result in new share
 
   $ hg --config share.pool=share clone source2 share-dest2
   (sharing from new pooled repository 22aeff664783fd44c6d9b435618173c118c3448e)
   requesting all changes
   adding changesets
   adding manifests
   adding file changes
   added 2 changesets with 2 changes to 1 files
   new changesets 22aeff664783:63cf6c3dba4a
   searching for changes
   no changes found
   updating working directory
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
   $ ls share
   22aeff664783fd44c6d9b435618173c118c3448e
   b5f04eac9d8f7a6a9fcb070243cccea7dc5ea0c1
 
 remote naming mode works as advertised
 
   $ hg --config share.pool=shareremote --config share.poolnaming=remote clone source1a share-remote1a
   (sharing from new pooled repository 195bb1fcdb595c14a6c13e0269129ed78f6debde)
   requesting all changes
   adding changesets
   adding manifests
   adding file changes
   added 3 changesets with 3 changes to 1 files
   new changesets b5f04eac9d8f:e5bfe23c0b47
   searching for changes
   no changes found
   adding remote bookmark bookA
   updating working directory
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
   $ ls shareremote
   195bb1fcdb595c14a6c13e0269129ed78f6debde
 
   $ hg --config share.pool=shareremote --config share.poolnaming=remote clone source1b share-remote1b
   (sharing from new pooled repository c0d4f83847ca2a873741feb7048a45085fd47c46)
   requesting all changes
   adding changesets
   adding manifests
   adding file changes
   added 6 changesets with 6 changes to 1 files (+4 heads)
   new changesets b5f04eac9d8f:6bacf4683960
   searching for changes
   no changes found
   adding remote bookmark head1
   adding remote bookmark head2
   updating working directory
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
   $ ls shareremote
   195bb1fcdb595c14a6c13e0269129ed78f6debde
   c0d4f83847ca2a873741feb7048a45085fd47c46
 
 request to clone a single revision is respected in sharing mode
 
   $ hg --config share.pool=sharerevs clone -r 4a8dc1ab4c13 source1b share-1arev
   (sharing from new pooled repository b5f04eac9d8f7a6a9fcb070243cccea7dc5ea0c1)
   adding changesets
   adding manifests
   adding file changes
   added 2 changesets with 2 changes to 1 files
   new changesets b5f04eac9d8f:4a8dc1ab4c13
   no changes found
   adding remote bookmark head1
   updating working directory
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
   $ hg -R share-1arev log -G
   @  changeset:   1:4a8dc1ab4c13
   |  bookmark:    head1
   |  tag:         tip
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     head1
   |
   o  changeset:   0:b5f04eac9d8f
      user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     initial
   
 
 making another clone should only pull down requested rev
 
   $ hg --config share.pool=sharerevs clone -r 99f71071f117 source1b share-1brev
   (sharing from existing pooled repository b5f04eac9d8f7a6a9fcb070243cccea7dc5ea0c1)
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   adding remote bookmark head1
   adding remote bookmark head2
   added 1 changesets with 1 changes to 1 files (+1 heads)
   new changesets 99f71071f117
   updating working directory
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
   $ hg -R share-1brev log -G
   @  changeset:   2:99f71071f117
   |  bookmark:    head2
   |  tag:         tip
   |  parent:      0:b5f04eac9d8f
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     head2
   |
   | o  changeset:   1:4a8dc1ab4c13
   |/   bookmark:    head1
   |    user:        test
   |    date:        Thu Jan 01 00:00:00 1970 +0000
   |    summary:     head1
   |
   o  changeset:   0:b5f04eac9d8f
      user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     initial
   
 
 Request to clone a single branch is respected in sharing mode
 
   $ hg --config share.pool=sharebranch clone -b branch1 source1b share-1bbranch1
   (sharing from new pooled repository b5f04eac9d8f7a6a9fcb070243cccea7dc5ea0c1)
   adding changesets
   adding manifests
   adding file changes
   added 2 changesets with 2 changes to 1 files
   new changesets b5f04eac9d8f:5f92a6c1a1b1
   no changes found
   updating working directory
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
   $ hg -R share-1bbranch1 log -G
   o  changeset:   1:5f92a6c1a1b1
   |  branch:      branch1
   |  tag:         tip
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     branch1
   |
   @  changeset:   0:b5f04eac9d8f
      user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     initial
   
 
   $ hg --config share.pool=sharebranch clone -b branch2 source1b share-1bbranch2
   (sharing from existing pooled repository b5f04eac9d8f7a6a9fcb070243cccea7dc5ea0c1)
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files (+1 heads)
   new changesets 6bacf4683960
   updating working directory
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
   $ hg -R share-1bbranch2 log -G
   o  changeset:   2:6bacf4683960
   |  branch:      branch2
   |  tag:         tip
   |  parent:      0:b5f04eac9d8f
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     branch2
   |
   | o  changeset:   1:5f92a6c1a1b1
   |/   branch:      branch1
   |    user:        test
   |    date:        Thu Jan 01 00:00:00 1970 +0000
   |    summary:     branch1
   |
   @  changeset:   0:b5f04eac9d8f
      user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     initial
   
 
 -U is respected in share clone mode
 
   $ hg --config share.pool=share clone -U source1a share-1anowc
   (sharing from existing pooled repository b5f04eac9d8f7a6a9fcb070243cccea7dc5ea0c1)
   searching for changes
   no changes found
   adding remote bookmark bookA
 
   $ ls -A share-1anowc
   .hg
 
 Test that auto sharing doesn't cause failure of "hg clone local remote"
 
   $ cd $TESTTMP
   $ hg -R a id -r 0
   acb14030fe0a
   $ hg id -R remote -r 0
   abort: repository remote not found!
   [255]
   $ hg --config share.pool=share -q clone -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" a ssh://user@dummy/remote
   $ hg -R remote id -r 0
   acb14030fe0a
 
 Cloning into pooled storage doesn't race (issue5104)
 
   $ HGPOSTLOCKDELAY=2.0 hg --config share.pool=racepool --config extensions.lockdelay=$TESTDIR/lockdelay.py clone source1a share-destrace1 > race1.log 2>&1 &
   $ HGPRELOCKDELAY=1.0 hg --config share.pool=racepool --config extensions.lockdelay=$TESTDIR/lockdelay.py clone source1a share-destrace2  > race2.log 2>&1
   $ wait
 
   $ hg -R share-destrace1 log -r tip
   changeset:   2:e5bfe23c0b47
   bookmark:    bookA
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     1a
   
 
   $ hg -R share-destrace2 log -r tip
   changeset:   2:e5bfe23c0b47
   bookmark:    bookA
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     1a
   
 One repo should be new, the other should be shared from the pool. We
 don't care which is which, so we just make sure we always print the
 one containing "new pooled" first, then one one containing "existing
 pooled".
 
   $ (grep 'new pooled' race1.log > /dev/null && cat race1.log || cat race2.log) | grep -v lock
   (sharing from new pooled repository b5f04eac9d8f7a6a9fcb070243cccea7dc5ea0c1)
   requesting all changes
   adding changesets
   adding manifests
   adding file changes
   added 3 changesets with 3 changes to 1 files
   new changesets b5f04eac9d8f:e5bfe23c0b47
   searching for changes
   no changes found
   adding remote bookmark bookA
   updating working directory
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
   $ (grep 'existing pooled' race1.log > /dev/null && cat race1.log || cat race2.log) | grep -v lock
   (sharing from existing pooled repository b5f04eac9d8f7a6a9fcb070243cccea7dc5ea0c1)
   searching for changes
   no changes found
   adding remote bookmark bookA
   updating working directory
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 SEC: check for unsafe ssh url
 
   $ cat >> $HGRCPATH << EOF
   > [ui]
   > ssh = sh -c "read l; read l; read l"
   > EOF
 
   $ hg clone 'ssh://-oProxyCommand=touch${IFS}owned/path'
   abort: potentially unsafe url: 'ssh://-oProxyCommand=touch${IFS}owned/path'
   [255]
   $ hg clone 'ssh://%2DoProxyCommand=touch${IFS}owned/path'
   abort: potentially unsafe url: 'ssh://-oProxyCommand=touch${IFS}owned/path'
   [255]
   $ hg clone 'ssh://fakehost|touch%20owned/path'
   abort: no suitable response from remote hg!
   [255]
   $ hg clone 'ssh://fakehost%7Ctouch%20owned/path'
   abort: no suitable response from remote hg!
   [255]
 
   $ hg clone 'ssh://-oProxyCommand=touch [e-mail]/nonexistent/path'
   abort: potentially unsafe url: 'ssh://-oProxyCommand=touch owned [e-mail]/nonexistent/path'
   [255]
 
 #if windows
   $ hg clone "ssh://%26touch%20owned%20/" --debug
   running sh -c "read l; read l; read l" "&touch owned " "hg -R . serve --stdio"
   sending upgrade request: * proto=exp-ssh-v2-0003 (glob) (sshv2 !)
   sending hello command
   sending between command
   abort: no suitable response from remote hg!
   [255]
   $ hg clone "ssh://example.com:%26touch%20owned%20/" --debug
   running sh -c "read l; read l; read l" -p "&touch owned " example.com "hg -R . serve --stdio"
   sending upgrade request: * proto=exp-ssh-v2-0003 (glob) (sshv2 !)
   sending hello command
   sending between command
   abort: no suitable response from remote hg!
   [255]
 #else
   $ hg clone "ssh://%3btouch%20owned%20/" --debug
   running sh -c "read l; read l; read l" ';touch owned ' 'hg -R . serve --stdio'
   sending upgrade request: * proto=exp-ssh-v2-0003 (glob) (sshv2 !)
   sending hello command
   sending between command
   abort: no suitable response from remote hg!
   [255]
   $ hg clone "ssh://example.com:%3btouch%20owned%20/" --debug
   running sh -c "read l; read l; read l" -p ';touch owned ' example.com 'hg -R . serve --stdio'
   sending upgrade request: * proto=exp-ssh-v2-0003 (glob) (sshv2 !)
   sending hello command
   sending between command
   abort: no suitable response from remote hg!
   [255]
 #endif
 
   $ hg clone "ssh://v-alid.example.com/" --debug
   running sh -c "read l; read l; read l" v-alid\.example\.com ['"]hg -R \. serve --stdio['"] (re)
   sending upgrade request: * proto=exp-ssh-v2-0003 (glob) (sshv2 !)
   sending hello command
   sending between command
   abort: no suitable response from remote hg!
   [255]
 
 We should not have created a file named owned - if it exists, the
 attack succeeded.
   $ if test -f owned; then echo 'you got owned'; fi
 
 Cloning without fsmonitor enabled does not print a warning for small repos
 
   $ hg clone a fsmonitor-default
   updating to bookmark @ on branch stable
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 Lower the warning threshold to simulate a large repo
 
   $ cat >> $HGRCPATH << EOF
   > [fsmonitor]
   > warn_update_file_count = 2
+  > warn_update_file_count_rust = 2
   > EOF
 
 We should see a warning about no fsmonitor on supported platforms
 
 #if linuxormacos no-fsmonitor
   $ hg clone a nofsmonitor
   updating to bookmark @ on branch stable
   (warning: large working directory being used without fsmonitor enabled; enable fsmonitor to improve performance; see "hg help -e fsmonitor")
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
 #else
   $ hg clone a nofsmonitor
   updating to bookmark @ on branch stable
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
 #endif
 
 We should not see warning about fsmonitor when it is enabled
 
 #if fsmonitor
   $ hg clone a fsmonitor-enabled
   updating to bookmark @ on branch stable
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
 #endif
 
 We can disable the fsmonitor warning
 
   $ hg --config fsmonitor.warn_when_unused=false clone a fsmonitor-disable-warning
   updating to bookmark @ on branch stable
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 Loaded fsmonitor but disabled in config should still print warning
 
 #if linuxormacos fsmonitor
   $ hg --config fsmonitor.mode=off clone a fsmonitor-mode-off
   updating to bookmark @ on branch stable
   (warning: large working directory being used without fsmonitor enabled; enable fsmonitor to improve performance; see "hg help -e fsmonitor") (fsmonitor !)
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
 #endif
 
 Warning not printed if working directory isn't empty
 
   $ hg -q clone a fsmonitor-update
   (warning: large working directory being used without fsmonitor enabled; enable fsmonitor to improve performance; see "hg help -e fsmonitor") (?)
   $ cd fsmonitor-update
   $ hg up acb14030fe0a
   1 files updated, 0 files merged, 2 files removed, 0 files unresolved
   (leaving bookmark @)
   $ hg up cf0fe1914066
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 `hg update` from null revision also prints
 
   $ hg up null
   0 files updated, 0 files merged, 2 files removed, 0 files unresolved
 
 #if linuxormacos no-fsmonitor
   $ hg up cf0fe1914066
   (warning: large working directory being used without fsmonitor enabled; enable fsmonitor to improve performance; see "hg help -e fsmonitor")
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
 #else
   $ hg up cf0fe1914066
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
 #endif
 
   $ cd ..