revset: include all non-public phases in _notpublic

We forgot up to update this when new phases were added.

mercurial/phases.py

@@ -1,979 +1,980 b''
 """ Mercurial phases support code
 
     ---
 
     Copyright 2011 Pierre-Yves David <[e-mail]>
                    Logilab SA        <[e-mail]>
                    Augie Fackler     <[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.
 
     ---
 
 This module implements most phase logic in mercurial.
 
 
 Basic Concept
 =============
 
 A 'changeset phase' is an indicator that tells us how a changeset is
 manipulated and communicated. The details of each phase is described
 below, here we describe the properties they have in common.
 
 Like bookmarks, phases are not stored in history and thus are not
 permanent and leave no audit trail.
 
 First, no changeset can be in two phases at once. Phases are ordered,
 so they can be considered from lowest to highest. The default, lowest
 phase is 'public' - this is the normal phase of existing changesets. A
 child changeset can not be in a lower phase than its parents.
 
 These phases share a hierarchy of traits:
 
             immutable shared
     public:     X        X
     draft:               X
     secret:
 
 Local commits are draft by default.
 
 Phase Movement and Exchange
 ===========================
 
 Phase data is exchanged by pushkey on pull and push. Some servers have
 a publish option set, we call such a server a "publishing server".
 Pushing a draft changeset to a publishing server changes the phase to
 public.
 
 A small list of fact/rules define the exchange of phase:
 
 * old client never changes server states
 * pull never changes server states
 * publish and old server changesets are seen as public by client
 * any secret changeset seen in another repository is lowered to at
   least draft
 
 Here is the final table summing up the 49 possible use cases of phase
 exchange:
 
                            server
                   old     publish      non-publish
                  N   X    N   D   P    N   D   P
     old client
     pull
      N           -   X/X  -   X/D X/P  -   X/D X/P
      X           -   X/X  -   X/D X/P  -   X/D X/P
     push
      X           X/X X/X  X/P X/P X/P  X/D X/D X/P
     new client
     pull
      N           -   P/X  -   P/D P/P  -   D/D P/P
      D           -   P/X  -   P/D P/P  -   D/D P/P
      P           -   P/X  -   P/D P/P  -   P/D P/P
     push
      D           P/X P/X  P/P P/P P/P  D/D D/D P/P
      P           P/X P/X  P/P P/P P/P  P/P P/P P/P
 
 Legend:
 
     A/B = final state on client / state on server
 
     * N = new/not present,
     * P = public,
     * D = draft,
     * X = not tracked (i.e., the old client or server has no internal
           way of recording the phase.)
 
     passive = only pushes
 
 
     A cell here can be read like this:
 
     "When a new client pushes a draft changeset (D) to a publishing
     server where it's not present (N), it's marked public on both
     sides (P/P)."
 
 Note: old client behave as a publishing server with draft only content
 - other people see it as public
 - content is pushed as draft
 
 """
 
 
 import struct
 
 from .i18n import _
 from .node import (
     bin,
     hex,
     nullrev,
     short,
     wdirrev,
 )
 from .pycompat import (
     getattr,
     setattr,
 )
 from . import (
     error,
     pycompat,
     requirements,
     smartset,
     txnutil,
     util,
 )
 
 if pycompat.TYPE_CHECKING:
     from typing import (
         Any,
         Callable,
         Dict,
         Iterable,
         List,
         Optional,
         Set,
         Tuple,
     )
     from . import (
         localrepo,
         ui as uimod,
     )
 
     Phaseroots = Dict[int, Set[bytes]]
     Phasedefaults = List[
         Callable[[localrepo.localrepository, Phaseroots], Phaseroots]
     ]
 
 
 _fphasesentry = struct.Struct(b'>i20s')
 
 # record phase index
 public, draft, secret = range(3)  # type: int
 archived = 32  # non-continuous for compatibility
 internal = 96  # non-continuous for compatibility
 allphases = (public, draft, secret, archived, internal)
 trackedphases = (draft, secret, archived, internal)
+not_public_phases = trackedphases
 # record phase names
 cmdphasenames = [b'public', b'draft', b'secret']  # known to `hg phase` command
 phasenames = dict(enumerate(cmdphasenames))
 phasenames[archived] = b'archived'
 phasenames[internal] = b'internal'
 # map phase name to phase number
 phasenumber = {name: phase for phase, name in phasenames.items()}
 # like phasenumber, but also include maps for the numeric and binary
 # phase number to the phase number
 phasenumber2 = phasenumber.copy()
 phasenumber2.update({phase: phase for phase in phasenames})
 phasenumber2.update({b'%i' % phase: phase for phase in phasenames})
 # record phase property
 mutablephases = (draft, secret, archived, internal)
 remotehiddenphases = (secret, archived, internal)
 localhiddenphases = (internal, archived)
 
 
 def supportinternal(repo):
     # type: (localrepo.localrepository) -> bool
     """True if the internal phase can be used on a repository"""
     return requirements.INTERNAL_PHASE_REQUIREMENT in repo.requirements
 
 
 def supportarchived(repo):
     # type: (localrepo.localrepository) -> bool
     """True if the archived phase can be used on a repository"""
     return requirements.ARCHIVED_PHASE_REQUIREMENT in repo.requirements
 
 
 def _readroots(repo, phasedefaults=None):
     # type: (localrepo.localrepository, Optional[Phasedefaults]) -> Tuple[Phaseroots, bool]
     """Read phase roots from disk
 
     phasedefaults is a list of fn(repo, roots) callable, which are
     executed if the phase roots file does not exist. When phases are
     being initialized on an existing repository, this could be used to
     set selected changesets phase to something else than public.
 
     Return (roots, dirty) where dirty is true if roots differ from
     what is being stored.
     """
     repo = repo.unfiltered()
     dirty = False
     roots = {i: set() for i in allphases}
     try:
         f, pending = txnutil.trypending(repo.root, repo.svfs, b'phaseroots')
         try:
             for line in f:
                 phase, nh = line.split()
                 roots[int(phase)].add(bin(nh))
         finally:
             f.close()
     except FileNotFoundError:
         if phasedefaults:
             for f in phasedefaults:
                 roots = f(repo, roots)
         dirty = True
     return roots, dirty
 
 
 def binaryencode(phasemapping):
     # type: (Dict[int, List[bytes]]) -> bytes
     """encode a 'phase -> nodes' mapping into a binary stream
 
     The revision lists are encoded as (phase, root) pairs.
     """
     binarydata = []
     for phase, nodes in phasemapping.items():
         for head in nodes:
             binarydata.append(_fphasesentry.pack(phase, head))
     return b''.join(binarydata)
 
 
 def binarydecode(stream):
     # type: (...) -> Dict[int, List[bytes]]
     """decode a binary stream into a 'phase -> nodes' mapping
 
     The (phase, root) pairs are turned back into a dictionary with
     the phase as index and the aggregated roots of that phase as value."""
     headsbyphase = {i: [] for i in allphases}
     entrysize = _fphasesentry.size
     while True:
         entry = stream.read(entrysize)
         if len(entry) < entrysize:
             if entry:
                 raise error.Abort(_(b'bad phase-heads stream'))
             break
         phase, node = _fphasesentry.unpack(entry)
         headsbyphase[phase].append(node)
     return headsbyphase
 
 
 def _sortedrange_insert(data, idx, rev, t):
     merge_before = False
     if idx:
         r1, t1 = data[idx - 1]
         merge_before = r1[-1] + 1 == rev and t1 == t
     merge_after = False
     if idx < len(data):
         r2, t2 = data[idx]
         merge_after = r2[0] == rev + 1 and t2 == t
 
     if merge_before and merge_after:
         data[idx - 1] = (range(r1[0], r2[-1] + 1), t)
         data.pop(idx)
     elif merge_before:
         data[idx - 1] = (range(r1[0], rev + 1), t)
     elif merge_after:
         data[idx] = (range(rev, r2[-1] + 1), t)
     else:
         data.insert(idx, (range(rev, rev + 1), t))
 
 
 def _sortedrange_split(data, idx, rev, t):
     r1, t1 = data[idx]
     if t == t1:
         return
     t = (t1[0], t[1])
     if len(r1) == 1:
         data.pop(idx)
         _sortedrange_insert(data, idx, rev, t)
     elif r1[0] == rev:
         data[idx] = (range(rev + 1, r1[-1] + 1), t1)
         _sortedrange_insert(data, idx, rev, t)
     elif r1[-1] == rev:
         data[idx] = (range(r1[0], rev), t1)
         _sortedrange_insert(data, idx + 1, rev, t)
     else:
         data[idx : idx + 1] = [
             (range(r1[0], rev), t1),
             (range(rev, rev + 1), t),
             (range(rev + 1, r1[-1] + 1), t1),
         ]
 
 
 def _trackphasechange(data, rev, old, new):
     """add a phase move to the <data> list of ranges
 
     If data is None, nothing happens.
     """
     if data is None:
         return
 
     # If data is empty, create a one-revision range and done
     if not data:
         data.insert(0, (range(rev, rev + 1), (old, new)))
         return
 
     low = 0
     high = len(data)
     t = (old, new)
     while low < high:
         mid = (low + high) // 2
         revs = data[mid][0]
         revs_low = revs[0]
         revs_high = revs[-1]
 
         if rev >= revs_low and rev <= revs_high:
             _sortedrange_split(data, mid, rev, t)
             return
 
         if revs_low == rev + 1:
             if mid and data[mid - 1][0][-1] == rev:
                 _sortedrange_split(data, mid - 1, rev, t)
             else:
                 _sortedrange_insert(data, mid, rev, t)
             return
 
         if revs_high == rev - 1:
             if mid + 1 < len(data) and data[mid + 1][0][0] == rev:
                 _sortedrange_split(data, mid + 1, rev, t)
             else:
                 _sortedrange_insert(data, mid + 1, rev, t)
             return
 
         if revs_low > rev:
             high = mid
         else:
             low = mid + 1
 
     if low == len(data):
         data.append((range(rev, rev + 1), t))
         return
 
     r1, t1 = data[low]
     if r1[0] > rev:
         data.insert(low, (range(rev, rev + 1), t))
     else:
         data.insert(low + 1, (range(rev, rev + 1), t))
 
 
 class phasecache:
     def __init__(self, repo, phasedefaults, _load=True):
         # type: (localrepo.localrepository, Optional[Phasedefaults], bool) -> None
         if _load:
             # Cheap trick to allow shallow-copy without copy module
             self.phaseroots, self.dirty = _readroots(repo, phasedefaults)
             self._loadedrevslen = 0
             self._phasesets = None
             self.filterunknown(repo)
             self.opener = repo.svfs
 
     def hasnonpublicphases(self, repo):
         # type: (localrepo.localrepository) -> bool
         """detect if there are revisions with non-public phase"""
         repo = repo.unfiltered()
         cl = repo.changelog
         if len(cl) >= self._loadedrevslen:
             self.invalidate()
             self.loadphaserevs(repo)
         return any(
             revs for phase, revs in self.phaseroots.items() if phase != public
         )
 
     def nonpublicphaseroots(self, repo):
         # type: (localrepo.localrepository) -> Set[bytes]
         """returns the roots of all non-public phases
 
         The roots are not minimized, so if the secret revisions are
         descendants of draft revisions, their roots will still be present.
         """
         repo = repo.unfiltered()
         cl = repo.changelog
         if len(cl) >= self._loadedrevslen:
             self.invalidate()
             self.loadphaserevs(repo)
         return set().union(
             *[
                 revs
                 for phase, revs in self.phaseroots.items()
                 if phase != public
             ]
         )
 
     def getrevset(self, repo, phases, subset=None):
         # type: (localrepo.localrepository, Iterable[int], Optional[Any]) -> Any
         # TODO: finish typing this
         """return a smartset for the given phases"""
         self.loadphaserevs(repo)  # ensure phase's sets are loaded
         phases = set(phases)
         publicphase = public in phases
 
         if publicphase:
             # In this case, phases keeps all the *other* phases.
             phases = set(allphases).difference(phases)
             if not phases:
                 return smartset.fullreposet(repo)
 
         # fast path: _phasesets contains the interesting sets,
         # might only need a union and post-filtering.
         revsneedscopy = False
         if len(phases) == 1:
             [p] = phases
             revs = self._phasesets[p]
             revsneedscopy = True  # Don't modify _phasesets
         else:
             # revs has the revisions in all *other* phases.
             revs = set.union(*[self._phasesets[p] for p in phases])
 
         def _addwdir(wdirsubset, wdirrevs):
             if wdirrev in wdirsubset and repo[None].phase() in phases:
                 if revsneedscopy:
                     wdirrevs = wdirrevs.copy()
                 # The working dir would never be in the # cache, but it was in
                 # the subset being filtered for its phase (or filtered out,
                 # depending on publicphase), so add it to the output to be
                 # included (or filtered out).
                 wdirrevs.add(wdirrev)
             return wdirrevs
 
         if not publicphase:
             if repo.changelog.filteredrevs:
                 revs = revs - repo.changelog.filteredrevs
 
             if subset is None:
                 return smartset.baseset(revs)
             else:
                 revs = _addwdir(subset, revs)
                 return subset & smartset.baseset(revs)
         else:
             if subset is None:
                 subset = smartset.fullreposet(repo)
 
             revs = _addwdir(subset, revs)
 
             if not revs:
                 return subset
             return subset.filter(lambda r: r not in revs)
 
     def copy(self):
         # Shallow copy meant to ensure isolation in
         # advance/retractboundary(), nothing more.
         ph = self.__class__(None, None, _load=False)
         ph.phaseroots = self.phaseroots.copy()
         ph.dirty = self.dirty
         ph.opener = self.opener
         ph._loadedrevslen = self._loadedrevslen
         ph._phasesets = self._phasesets
         return ph
 
     def replace(self, phcache):
         """replace all values in 'self' with content of phcache"""
         for a in (
             b'phaseroots',
             b'dirty',
             b'opener',
             b'_loadedrevslen',
             b'_phasesets',
         ):
             setattr(self, a, getattr(phcache, a))
 
     def _getphaserevsnative(self, repo):
         repo = repo.unfiltered()
         return repo.changelog.computephases(self.phaseroots)
 
     def _computephaserevspure(self, repo):
         repo = repo.unfiltered()
         cl = repo.changelog
         self._phasesets = {phase: set() for phase in allphases}
         lowerroots = set()
         for phase in reversed(trackedphases):
             roots = pycompat.maplist(cl.rev, self.phaseroots[phase])
             if roots:
                 ps = set(cl.descendants(roots))
                 for root in roots:
                     ps.add(root)
                 ps.difference_update(lowerroots)
                 lowerroots.update(ps)
                 self._phasesets[phase] = ps
         self._loadedrevslen = len(cl)
 
     def loadphaserevs(self, repo):
         # type: (localrepo.localrepository) -> None
         """ensure phase information is loaded in the object"""
         if self._phasesets is None:
             try:
                 res = self._getphaserevsnative(repo)
                 self._loadedrevslen, self._phasesets = res
             except AttributeError:
                 self._computephaserevspure(repo)
 
     def invalidate(self):
         self._loadedrevslen = 0
         self._phasesets = None
 
     def phase(self, repo, rev):
         # type: (localrepo.localrepository, int) -> int
         # We need a repo argument here to be able to build _phasesets
         # if necessary. The repository instance is not stored in
         # phasecache to avoid reference cycles. The changelog instance
         # is not stored because it is a filecache() property and can
         # be replaced without us being notified.
         if rev == nullrev:
             return public
         if rev < nullrev:
             raise ValueError(_(b'cannot lookup negative revision'))
         if rev >= self._loadedrevslen:
             self.invalidate()
             self.loadphaserevs(repo)
         for phase in trackedphases:
             if rev in self._phasesets[phase]:
                 return phase
         return public
 
     def write(self):
         if not self.dirty:
             return
         f = self.opener(b'phaseroots', b'w', atomictemp=True, checkambig=True)
         try:
             self._write(f)
         finally:
             f.close()
 
     def _write(self, fp):
         for phase, roots in self.phaseroots.items():
             for h in sorted(roots):
                 fp.write(b'%i %s\n' % (phase, hex(h)))
         self.dirty = False
 
     def _updateroots(self, phase, newroots, tr):
         self.phaseroots[phase] = newroots
         self.invalidate()
         self.dirty = True
 
         tr.addfilegenerator(b'phase', (b'phaseroots',), self._write)
         tr.hookargs[b'phases_moved'] = b'1'
 
     def registernew(self, repo, tr, targetphase, revs):
         repo = repo.unfiltered()
         self._retractboundary(repo, tr, targetphase, [], revs=revs)
         if tr is not None and b'phases' in tr.changes:
             phasetracking = tr.changes[b'phases']
             phase = self.phase
             for rev in sorted(revs):
                 revphase = phase(repo, rev)
                 _trackphasechange(phasetracking, rev, None, revphase)
         repo.invalidatevolatilesets()
 
     def advanceboundary(
         self, repo, tr, targetphase, nodes, revs=None, dryrun=None
     ):
         """Set all 'nodes' to phase 'targetphase'
 
         Nodes with a phase lower than 'targetphase' are not affected.
 
         If dryrun is True, no actions will be performed
 
         Returns a set of revs whose phase is changed or should be changed
         """
         # Be careful to preserve shallow-copied values: do not update
         # phaseroots values, replace them.
         if revs is None:
             revs = []
         if tr is None:
             phasetracking = None
         else:
             phasetracking = tr.changes.get(b'phases')
 
         repo = repo.unfiltered()
         revs = [repo[n].rev() for n in nodes] + [r for r in revs]
 
         changes = set()  # set of revisions to be changed
         delroots = []  # set of root deleted by this path
         for phase in (phase for phase in allphases if phase > targetphase):
             # filter nodes that are not in a compatible phase already
             revs = [rev for rev in revs if self.phase(repo, rev) >= phase]
             if not revs:
                 break  # no roots to move anymore
 
             olds = self.phaseroots[phase]
 
             affected = repo.revs(b'%ln::%ld', olds, revs)
             changes.update(affected)
             if dryrun:
                 continue
             for r in affected:
                 _trackphasechange(
                     phasetracking, r, self.phase(repo, r), targetphase
                 )
 
             roots = {
                 ctx.node()
                 for ctx in repo.set(b'roots((%ln::) - %ld)', olds, affected)
             }
             if olds != roots:
                 self._updateroots(phase, roots, tr)
                 # some roots may need to be declared for lower phases
                 delroots.extend(olds - roots)
         if not dryrun:
             # declare deleted root in the target phase
             if targetphase != 0:
                 self._retractboundary(repo, tr, targetphase, delroots)
             repo.invalidatevolatilesets()
         return changes
 
     def retractboundary(self, repo, tr, targetphase, nodes):
         oldroots = {
             phase: revs
             for phase, revs in self.phaseroots.items()
             if phase <= targetphase
         }
         if tr is None:
             phasetracking = None
         else:
             phasetracking = tr.changes.get(b'phases')
         repo = repo.unfiltered()
         if (
             self._retractboundary(repo, tr, targetphase, nodes)
             and phasetracking is not None
         ):
 
             # find the affected revisions
             new = self.phaseroots[targetphase]
             old = oldroots[targetphase]
             affected = set(repo.revs(b'(%ln::) - (%ln::)', new, old))
 
             # find the phase of the affected revision
             for phase in range(targetphase, -1, -1):
                 if phase:
                     roots = oldroots.get(phase, [])
                     revs = set(repo.revs(b'%ln::%ld', roots, affected))
                     affected -= revs
                 else:  # public phase
                     revs = affected
                 for r in sorted(revs):
                     _trackphasechange(phasetracking, r, phase, targetphase)
         repo.invalidatevolatilesets()
 
     def _retractboundary(self, repo, tr, targetphase, nodes, revs=None):
         # Be careful to preserve shallow-copied values: do not update
         # phaseroots values, replace them.
         if revs is None:
             revs = []
         if (
             targetphase == internal
             and not supportinternal(repo)
             or targetphase == archived
             and not supportarchived(repo)
         ):
             name = phasenames[targetphase]
             msg = b'this repository does not support the %s phase' % name
             raise error.ProgrammingError(msg)
 
         repo = repo.unfiltered()
         torev = repo.changelog.rev
         tonode = repo.changelog.node
         currentroots = {torev(node) for node in self.phaseroots[targetphase]}
         finalroots = oldroots = set(currentroots)
         newroots = [torev(node) for node in nodes] + [r for r in revs]
         newroots = [
             rev for rev in newroots if self.phase(repo, rev) < targetphase
         ]
 
         if newroots:
             if nullrev in newroots:
                 raise error.Abort(_(b'cannot change null revision phase'))
             currentroots.update(newroots)
 
             # Only compute new roots for revs above the roots that are being
             # retracted.
             minnewroot = min(newroots)
             aboveroots = [rev for rev in currentroots if rev >= minnewroot]
             updatedroots = repo.revs(b'roots(%ld::)', aboveroots)
 
             finalroots = {rev for rev in currentroots if rev < minnewroot}
             finalroots.update(updatedroots)
         if finalroots != oldroots:
             self._updateroots(
                 targetphase, {tonode(rev) for rev in finalroots}, tr
             )
             return True
         return False
 
     def filterunknown(self, repo):
         # type: (localrepo.localrepository) -> None
         """remove unknown nodes from the phase boundary
 
         Nothing is lost as unknown nodes only hold data for their descendants.
         """
         filtered = False
         has_node = repo.changelog.index.has_node  # to filter unknown nodes
         for phase, nodes in self.phaseroots.items():
             missing = sorted(node for node in nodes if not has_node(node))
             if missing:
                 for mnode in missing:
                     repo.ui.debug(
                         b'removing unknown node %s from %i-phase boundary\n'
                         % (short(mnode), phase)
                     )
                 nodes.symmetric_difference_update(missing)
                 filtered = True
         if filtered:
             self.dirty = True
         # filterunknown is called by repo.destroyed, we may have no changes in
         # root but _phasesets contents is certainly invalid (or at least we
         # have not proper way to check that). related to issue 3858.
         #
         # The other caller is __init__ that have no _phasesets initialized
         # anyway. If this change we should consider adding a dedicated
         # "destroyed" function to phasecache or a proper cache key mechanism
         # (see branchmap one)
         self.invalidate()
 
 
 def advanceboundary(repo, tr, targetphase, nodes, revs=None, dryrun=None):
     """Add nodes to a phase changing other nodes phases if necessary.
 
     This function move boundary *forward* this means that all nodes
     are set in the target phase or kept in a *lower* phase.
 
     Simplify boundary to contains phase roots only.
 
     If dryrun is True, no actions will be performed
 
     Returns a set of revs whose phase is changed or should be changed
     """
     if revs is None:
         revs = []
     phcache = repo._phasecache.copy()
     changes = phcache.advanceboundary(
         repo, tr, targetphase, nodes, revs=revs, dryrun=dryrun
     )
     if not dryrun:
         repo._phasecache.replace(phcache)
     return changes
 
 
 def retractboundary(repo, tr, targetphase, nodes):
     """Set nodes back to a phase changing other nodes phases if
     necessary.
 
     This function move boundary *backward* this means that all nodes
     are set in the target phase or kept in a *higher* phase.
 
     Simplify boundary to contains phase roots only."""
     phcache = repo._phasecache.copy()
     phcache.retractboundary(repo, tr, targetphase, nodes)
     repo._phasecache.replace(phcache)
 
 
 def registernew(repo, tr, targetphase, revs):
     """register a new revision and its phase
 
     Code adding revisions to the repository should use this function to
     set new changeset in their target phase (or higher).
     """
     phcache = repo._phasecache.copy()
     phcache.registernew(repo, tr, targetphase, revs)
     repo._phasecache.replace(phcache)
 
 
 def listphases(repo):
     # type: (localrepo.localrepository) -> Dict[bytes, bytes]
     """List phases root for serialization over pushkey"""
     # Use ordered dictionary so behavior is deterministic.
     keys = util.sortdict()
     value = b'%i' % draft
     cl = repo.unfiltered().changelog
     for root in repo._phasecache.phaseroots[draft]:
         if repo._phasecache.phase(repo, cl.rev(root)) <= draft:
             keys[hex(root)] = value
 
     if repo.publishing():
         # Add an extra data to let remote know we are a publishing
         # repo. Publishing repo can't just pretend they are old repo.
         # When pushing to a publishing repo, the client still need to
         # push phase boundary
         #
         # Push do not only push changeset. It also push phase data.
         # New phase data may apply to common changeset which won't be
         # push (as they are common). Here is a very simple example:
         #
         # 1) repo A push changeset X as draft to repo B
         # 2) repo B make changeset X public
         # 3) repo B push to repo A. X is not pushed but the data that
         #    X as now public should
         #
         # The server can't handle it on it's own as it has no idea of
         # client phase data.
         keys[b'publishing'] = b'True'
     return keys
 
 
 def pushphase(repo, nhex, oldphasestr, newphasestr):
     # type: (localrepo.localrepository, bytes, bytes, bytes) -> bool
     """List phases root for serialization over pushkey"""
     repo = repo.unfiltered()
     with repo.lock():
         currentphase = repo[nhex].phase()
         newphase = abs(int(newphasestr))  # let's avoid negative index surprise
         oldphase = abs(int(oldphasestr))  # let's avoid negative index surprise
         if currentphase == oldphase and newphase < oldphase:
             with repo.transaction(b'pushkey-phase') as tr:
                 advanceboundary(repo, tr, newphase, [bin(nhex)])
             return True
         elif currentphase == newphase:
             # raced, but got correct result
             return True
         else:
             return False
 
 
 def subsetphaseheads(repo, subset):
     """Finds the phase heads for a subset of a history
 
     Returns a list indexed by phase number where each item is a list of phase
     head nodes.
     """
     cl = repo.changelog
 
     headsbyphase = {i: [] for i in allphases}
     # No need to keep track of secret phase; any heads in the subset that
     # are not mentioned are implicitly secret.
     for phase in allphases[:secret]:
         revset = b"heads(%%ln & %s())" % phasenames[phase]
         headsbyphase[phase] = [cl.node(r) for r in repo.revs(revset, subset)]
     return headsbyphase
 
 
 def updatephases(repo, trgetter, headsbyphase):
     """Updates the repo with the given phase heads"""
     # Now advance phase boundaries of all phases
     #
     # run the update (and fetch transaction) only if there are actually things
     # to update. This avoid creating empty transaction during no-op operation.
 
     for phase in allphases:
         revset = b'%ln - _phase(%s)'
         heads = [c.node() for c in repo.set(revset, headsbyphase[phase], phase)]
         if heads:
             advanceboundary(repo, trgetter(), phase, heads)
 
 
 def analyzeremotephases(repo, subset, roots):
     """Compute phases heads and root in a subset of node from root dict
 
     * subset is heads of the subset
     * roots is {<nodeid> => phase} mapping. key and value are string.
 
     Accept unknown element input
     """
     repo = repo.unfiltered()
     # build list from dictionary
     draftroots = []
     has_node = repo.changelog.index.has_node  # to filter unknown nodes
     for nhex, phase in roots.items():
         if nhex == b'publishing':  # ignore data related to publish option
             continue
         node = bin(nhex)
         phase = int(phase)
         if phase == public:
             if node != repo.nullid:
                 repo.ui.warn(
                     _(
                         b'ignoring inconsistent public root'
                         b' from remote: %s\n'
                     )
                     % nhex
                 )
         elif phase == draft:
             if has_node(node):
                 draftroots.append(node)
         else:
             repo.ui.warn(
                 _(b'ignoring unexpected root from remote: %i %s\n')
                 % (phase, nhex)
             )
     # compute heads
     publicheads = newheads(repo, subset, draftroots)
     return publicheads, draftroots
 
 
 class remotephasessummary:
     """summarize phase information on the remote side
 
     :publishing: True is the remote is publishing
     :publicheads: list of remote public phase heads (nodes)
     :draftheads: list of remote draft phase heads (nodes)
     :draftroots: list of remote draft phase root (nodes)
     """
 
     def __init__(self, repo, remotesubset, remoteroots):
         unfi = repo.unfiltered()
         self._allremoteroots = remoteroots
 
         self.publishing = remoteroots.get(b'publishing', False)
 
         ana = analyzeremotephases(repo, remotesubset, remoteroots)
         self.publicheads, self.draftroots = ana
         # Get the list of all "heads" revs draft on remote
         dheads = unfi.set(b'heads(%ln::%ln)', self.draftroots, remotesubset)
         self.draftheads = [c.node() for c in dheads]
 
 
 def newheads(repo, heads, roots):
     """compute new head of a subset minus another
 
     * `heads`: define the first subset
     * `roots`: define the second we subtract from the first"""
     # prevent an import cycle
     # phases > dagop > patch > copies > scmutil > obsolete > obsutil > phases
     from . import dagop
 
     repo = repo.unfiltered()
     cl = repo.changelog
     rev = cl.index.get_rev
     if not roots:
         return heads
     if not heads or heads == [repo.nullid]:
         return []
     # The logic operated on revisions, convert arguments early for convenience
     new_heads = {rev(n) for n in heads if n != repo.nullid}
     roots = [rev(n) for n in roots]
     # compute the area we need to remove
     affected_zone = repo.revs(b"(%ld::%ld)", roots, new_heads)
     # heads in the area are no longer heads
     new_heads.difference_update(affected_zone)
     # revisions in the area have children outside of it,
     # They might be new heads
     candidates = repo.revs(
         b"parents(%ld + (%ld and merge())) and not null", roots, affected_zone
     )
     candidates -= affected_zone
     if new_heads or candidates:
         # remove candidate that are ancestors of other heads
         new_heads.update(candidates)
         prunestart = repo.revs(b"parents(%ld) and not null", new_heads)
         pruned = dagop.reachableroots(repo, candidates, prunestart)
         new_heads.difference_update(pruned)
 
     return pycompat.maplist(cl.node, sorted(new_heads))
 
 
 def newcommitphase(ui):
     # type: (uimod.ui) -> int
     """helper to get the target phase of new commit
 
     Handle all possible values for the phases.new-commit options.
 
     """
     v = ui.config(b'phases', b'new-commit')
     try:
         return phasenumber2[v]
     except KeyError:
         raise error.ConfigError(
             _(b"phases.new-commit: not a valid phase name ('%s')") % v
         )
 
 
 def hassecret(repo):
     # type: (localrepo.localrepository) -> bool
     """utility function that check if a repo have any secret changeset."""
     return bool(repo._phasecache.phaseroots[secret])
 
 
 def preparehookargs(node, old, new):
     # type: (bytes, Optional[int], Optional[int]) -> Dict[bytes, bytes]
     if old is None:
         old = b''
     else:
         old = phasenames[old]
     return {b'node': node, b'oldphase': old, b'phase': phasenames[new]}

mercurial/revset.py

@@ -1,2869 +1,2869 b''
 # revset.py - revision set queries for mercurial
 #
 # Copyright 2010 Olivia 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.
 
 
 import binascii
 import functools
 import random
 import re
 
 from .i18n import _
 from .pycompat import getattr
 from .node import (
     bin,
     nullrev,
     wdirrev,
 )
 from . import (
     dagop,
     destutil,
     diffutil,
     encoding,
     error,
     grep as grepmod,
     hbisect,
     match as matchmod,
     obsolete as obsmod,
     obsutil,
     pathutil,
     phases,
     pycompat,
     registrar,
     repoview,
     revsetlang,
     scmutil,
     smartset,
     stack as stackmod,
     util,
 )
 from .utils import (
     dateutil,
     stringutil,
     urlutil,
 )
 
 # helpers for processing parsed tree
 getsymbol = revsetlang.getsymbol
 getstring = revsetlang.getstring
 getinteger = revsetlang.getinteger
 getboolean = revsetlang.getboolean
 getlist = revsetlang.getlist
 getintrange = revsetlang.getintrange
 getargs = revsetlang.getargs
 getargsdict = revsetlang.getargsdict
 
 baseset = smartset.baseset
 generatorset = smartset.generatorset
 spanset = smartset.spanset
 fullreposet = smartset.fullreposet
 
 # revisions not included in all(), but populated if specified
 _virtualrevs = (nullrev, wdirrev)
 
 # Constants for ordering requirement, used in getset():
 #
 # If 'define', any nested functions and operations MAY change the ordering of
 # the entries in the set (but if changes the ordering, it MUST ALWAYS change
 # it). If 'follow', any nested functions and operations MUST take the ordering
 # specified by the first operand to the '&' operator.
 #
 # For instance,
 #
 #   X & (Y | Z)
 #   ^   ^^^^^^^
 #   |   follow
 #   define
 #
 # will be evaluated as 'or(y(x()), z(x()))', where 'x()' can change the order
 # of the entries in the set, but 'y()', 'z()' and 'or()' shouldn't.
 #
 # 'any' means the order doesn't matter. For instance,
 #
 #   (X & !Y) | ancestors(Z)
 #         ^              ^
 #         any            any
 #
 # For 'X & !Y', 'X' decides the order and 'Y' is subtracted from 'X', so the
 # order of 'Y' does not matter. For 'ancestors(Z)', Z's order does not matter
 # since 'ancestors' does not care about the order of its argument.
 #
 # Currently, most revsets do not care about the order, so 'define' is
 # equivalent to 'follow' for them, and the resulting order is based on the
 # 'subset' parameter passed down to them:
 #
 #   m = revset.match(...)
 #   m(repo, subset, order=defineorder)
 #           ^^^^^^
 #      For most revsets, 'define' means using the order this subset provides
 #
 # There are a few revsets that always redefine the order if 'define' is
 # specified: 'sort(X)', 'reverse(X)', 'x:y'.
 anyorder = b'any'  # don't care the order, could be even random-shuffled
 defineorder = b'define'  # ALWAYS redefine, or ALWAYS follow the current order
 followorder = b'follow'  # MUST follow the current order
 
 # helpers
 
 
 def getset(repo, subset, x, order=defineorder):
     if not x:
         raise error.ParseError(_(b"missing argument"))
     return methods[x[0]](repo, subset, *x[1:], order=order)
 
 
 def _getrevsource(repo, r):
     extra = repo[r].extra()
     for label in (b'source', b'transplant_source', b'rebase_source'):
         if label in extra:
             try:
                 return repo[extra[label]].rev()
             except error.RepoLookupError:
                 pass
     return None
 
 
 def _sortedb(xs):
     return sorted(pycompat.rapply(pycompat.maybebytestr, xs))
 
 
 # operator methods
 
 
 def stringset(repo, subset, x, order):
     if not x:
         raise error.ParseError(_(b"empty string is not a valid revision"))
     x = scmutil.intrev(scmutil.revsymbol(repo, x))
     if x in subset or x in _virtualrevs and isinstance(subset, fullreposet):
         return baseset([x])
     return baseset()
 
 
 def rawsmartset(repo, subset, x, order):
     """argument is already a smartset, use that directly"""
     if order == followorder:
         return subset & x
     else:
         return x & subset
 
 
 def rangeset(repo, subset, x, y, order):
     m = getset(repo, fullreposet(repo), x)
     n = getset(repo, fullreposet(repo), y)
 
     if not m or not n:
         return baseset()
     return _makerangeset(repo, subset, m.first(), n.last(), order)
 
 
 def rangeall(repo, subset, x, order):
     assert x is None
     return _makerangeset(repo, subset, 0, repo.changelog.tiprev(), order)
 
 
 def rangepre(repo, subset, y, order):
     # ':y' can't be rewritten to '0:y' since '0' may be hidden
     n = getset(repo, fullreposet(repo), y)
     if not n:
         return baseset()
     return _makerangeset(repo, subset, 0, n.last(), order)
 
 
 def rangepost(repo, subset, x, order):
     m = getset(repo, fullreposet(repo), x)
     if not m:
         return baseset()
     return _makerangeset(
         repo, subset, m.first(), repo.changelog.tiprev(), order
     )
 
 
 def _makerangeset(repo, subset, m, n, order):
     if m == n:
         r = baseset([m])
     elif n == wdirrev:
         r = spanset(repo, m, len(repo)) + baseset([n])
     elif m == wdirrev:
         r = baseset([m]) + spanset(repo, repo.changelog.tiprev(), n - 1)
     elif m < n:
         r = spanset(repo, m, n + 1)
     else:
         r = spanset(repo, m, n - 1)
 
     if order == defineorder:
         return r & subset
     else:
         # carrying the sorting over when possible would be more efficient
         return subset & r
 
 
 def dagrange(repo, subset, x, y, order):
     r = fullreposet(repo)
     xs = dagop.reachableroots(
         repo, getset(repo, r, x), getset(repo, r, y), includepath=True
     )
     return subset & xs
 
 
 def andset(repo, subset, x, y, order):
     if order == anyorder:
         yorder = anyorder
     else:
         yorder = followorder
     return getset(repo, getset(repo, subset, x, order), y, yorder)
 
 
 def andsmallyset(repo, subset, x, y, order):
     # 'andsmally(x, y)' is equivalent to 'and(x, y)', but faster when y is small
     if order == anyorder:
         yorder = anyorder
     else:
         yorder = followorder
     return getset(repo, getset(repo, subset, y, yorder), x, order)
 
 
 def differenceset(repo, subset, x, y, order):
     return getset(repo, subset, x, order) - getset(repo, subset, y, anyorder)
 
 
 def _orsetlist(repo, subset, xs, order):
     assert xs
     if len(xs) == 1:
         return getset(repo, subset, xs[0], order)
     p = len(xs) // 2
     a = _orsetlist(repo, subset, xs[:p], order)
     b = _orsetlist(repo, subset, xs[p:], order)
     return a + b
 
 
 def orset(repo, subset, x, order):
     xs = getlist(x)
     if not xs:
         return baseset()
     if order == followorder:
         # slow path to take the subset order
         return subset & _orsetlist(repo, fullreposet(repo), xs, anyorder)
     else:
         return _orsetlist(repo, subset, xs, order)
 
 
 def notset(repo, subset, x, order):
     return subset - getset(repo, subset, x, anyorder)
 
 
 def relationset(repo, subset, x, y, order):
     # this is pretty basic implementation of 'x#y' operator, still
     # experimental so undocumented. see the wiki for further ideas.
     # https://www.mercurial-scm.org/wiki/RevsetOperatorPlan
     rel = getsymbol(y)
     if rel in relations:
         return relations[rel](repo, subset, x, rel, order)
 
     relnames = [r for r in relations.keys() if len(r) > 1]
     raise error.UnknownIdentifier(rel, relnames)
 
 
 def _splitrange(a, b):
     """Split range with bounds a and b into two ranges at 0 and return two
     tuples of numbers for use as startdepth and stopdepth arguments of
     revancestors and revdescendants.
 
     >>> _splitrange(-10, -5)     # [-10:-5]
     ((5, 11), (None, None))
     >>> _splitrange(5, 10)       # [5:10]
     ((None, None), (5, 11))
     >>> _splitrange(-10, 10)     # [-10:10]
     ((0, 11), (0, 11))
     >>> _splitrange(-10, 0)      # [-10:0]
     ((0, 11), (None, None))
     >>> _splitrange(0, 10)       # [0:10]
     ((None, None), (0, 11))
     >>> _splitrange(0, 0)        # [0:0]
     ((0, 1), (None, None))
     >>> _splitrange(1, -1)       # [1:-1]
     ((None, None), (None, None))
     """
     ancdepths = (None, None)
     descdepths = (None, None)
     if a == b == 0:
         ancdepths = (0, 1)
     if a < 0:
         ancdepths = (-min(b, 0), -a + 1)
     if b > 0:
         descdepths = (max(a, 0), b + 1)
     return ancdepths, descdepths
 
 
 def generationsrel(repo, subset, x, rel, order):
     z = (b'rangeall', None)
     return generationssubrel(repo, subset, x, rel, z, order)
 
 
 def generationssubrel(repo, subset, x, rel, z, order):
     # TODO: rewrite tests, and drop startdepth argument from ancestors() and
     # descendants() predicates
     a, b = getintrange(
         z,
         _(b'relation subscript must be an integer or a range'),
         _(b'relation subscript bounds must be integers'),
         deffirst=-(dagop.maxlogdepth - 1),
         deflast=+(dagop.maxlogdepth - 1),
     )
     (ancstart, ancstop), (descstart, descstop) = _splitrange(a, b)
 
     if ancstart is None and descstart is None:
         return baseset()
 
     revs = getset(repo, fullreposet(repo), x)
     if not revs:
         return baseset()
 
     if ancstart is not None and descstart is not None:
         s = dagop.revancestors(repo, revs, False, ancstart, ancstop)
         s += dagop.revdescendants(repo, revs, False, descstart, descstop)
     elif ancstart is not None:
         s = dagop.revancestors(repo, revs, False, ancstart, ancstop)
     elif descstart is not None:
         s = dagop.revdescendants(repo, revs, False, descstart, descstop)
 
     return subset & s
 
 
 def relsubscriptset(repo, subset, x, y, z, order):
     # this is pretty basic implementation of 'x#y[z]' operator, still
     # experimental so undocumented. see the wiki for further ideas.
     # https://www.mercurial-scm.org/wiki/RevsetOperatorPlan
     rel = getsymbol(y)
     if rel in subscriptrelations:
         return subscriptrelations[rel](repo, subset, x, rel, z, order)
 
     relnames = [r for r in subscriptrelations.keys() if len(r) > 1]
     raise error.UnknownIdentifier(rel, relnames)
 
 
 def subscriptset(repo, subset, x, y, order):
     raise error.ParseError(_(b"can't use a subscript in this context"))
 
 
 def listset(repo, subset, *xs, **opts):
     raise error.ParseError(
         _(b"can't use a list in this context"),
         hint=_(b'see \'hg help "revsets.x or y"\''),
     )
 
 
 def keyvaluepair(repo, subset, k, v, order):
     raise error.ParseError(_(b"can't use a key-value pair in this context"))
 
 
 def func(repo, subset, a, b, order):
     f = getsymbol(a)
     if f in symbols:
         func = symbols[f]
         if getattr(func, '_takeorder', False):
             return func(repo, subset, b, order)
         return func(repo, subset, b)
 
     keep = lambda fn: getattr(fn, '__doc__', None) is not None
 
     syms = [s for (s, fn) in symbols.items() if keep(fn)]
     raise error.UnknownIdentifier(f, syms)
 
 
 # functions
 
 # symbols are callables like:
 #   fn(repo, subset, x)
 # with:
 #   repo - current repository instance
 #   subset - of revisions to be examined
 #   x - argument in tree form
 symbols = revsetlang.symbols
 
 # symbols which can't be used for a DoS attack for any given input
 # (e.g. those which accept regexes as plain strings shouldn't be included)
 # functions that just return a lot of changesets (like all) don't count here
 safesymbols = set()
 
 predicate = registrar.revsetpredicate()
 
 
 @predicate(b'_destupdate')
 def _destupdate(repo, subset, x):
     # experimental revset for update destination
     args = getargsdict(x, b'limit', b'clean')
     return subset & baseset(
         [destutil.destupdate(repo, **pycompat.strkwargs(args))[0]]
     )
 
 
 @predicate(b'_destmerge')
 def _destmerge(repo, subset, x):
     # experimental revset for merge destination
     sourceset = None
     if x is not None:
         sourceset = getset(repo, fullreposet(repo), x)
     return subset & baseset([destutil.destmerge(repo, sourceset=sourceset)])
 
 
 @predicate(b'adds(pattern)', safe=True, weight=30)
 def adds(repo, subset, x):
     """Changesets that add a file matching pattern.
 
     The pattern without explicit kind like ``glob:`` is expected to be
     relative to the current directory and match against a file or a
     directory.
     """
     # i18n: "adds" is a keyword
     pat = getstring(x, _(b"adds requires a pattern"))
     return checkstatus(repo, subset, pat, 'added')
 
 
 @predicate(b'ancestor(*changeset)', safe=True, weight=0.5)
 def ancestor(repo, subset, x):
     """A greatest common ancestor of the changesets.
 
     Accepts 0 or more changesets.
     Will return empty list when passed no args.
     Greatest common ancestor of a single changeset is that changeset.
     """
     reviter = iter(orset(repo, fullreposet(repo), x, order=anyorder))
     try:
         anc = repo[next(reviter)]
     except StopIteration:
         return baseset()
     for r in reviter:
         anc = anc.ancestor(repo[r])
 
     r = scmutil.intrev(anc)
     if r in subset:
         return baseset([r])
     return baseset()
 
 
 def _ancestors(
     repo, subset, x, followfirst=False, startdepth=None, stopdepth=None
 ):
     heads = getset(repo, fullreposet(repo), x)
     if not heads:
         return baseset()
     s = dagop.revancestors(repo, heads, followfirst, startdepth, stopdepth)
     return subset & s
 
 
 @predicate(b'ancestors(set[, depth])', safe=True)
 def ancestors(repo, subset, x):
     """Changesets that are ancestors of changesets in set, including the
     given changesets themselves.
 
     If depth is specified, the result only includes changesets up to
     the specified generation.
     """
     # startdepth is for internal use only until we can decide the UI
     args = getargsdict(x, b'ancestors', b'set depth startdepth')
     if b'set' not in args:
         # i18n: "ancestors" is a keyword
         raise error.ParseError(_(b'ancestors takes at least 1 argument'))
     startdepth = stopdepth = None
     if b'startdepth' in args:
         n = getinteger(
             args[b'startdepth'], b"ancestors expects an integer startdepth"
         )
         if n < 0:
             raise error.ParseError(b"negative startdepth")
         startdepth = n
     if b'depth' in args:
         # i18n: "ancestors" is a keyword
         n = getinteger(args[b'depth'], _(b"ancestors expects an integer depth"))
         if n < 0:
             raise error.ParseError(_(b"negative depth"))
         stopdepth = n + 1
     return _ancestors(
         repo, subset, args[b'set'], startdepth=startdepth, stopdepth=stopdepth
     )
 
 
 @predicate(b'_firstancestors', safe=True)
 def _firstancestors(repo, subset, x):
     # ``_firstancestors(set)``
     # Like ``ancestors(set)`` but follows only the first parents.
     return _ancestors(repo, subset, x, followfirst=True)
 
 
 def _childrenspec(repo, subset, x, n, order):
     """Changesets that are the Nth child of a changeset
     in set.
     """
     cs = set()
     for r in getset(repo, fullreposet(repo), x):
         for i in range(n):
             c = repo[r].children()
             if len(c) == 0:
                 break
             if len(c) > 1:
                 raise error.RepoLookupError(
                     _(b"revision in set has more than one child")
                 )
             r = c[0].rev()
         else:
             cs.add(r)
     return subset & cs
 
 
 def ancestorspec(repo, subset, x, n, order):
     """``set~n``
     Changesets that are the Nth ancestor (first parents only) of a changeset
     in set.
     """
     n = getinteger(n, _(b"~ expects a number"))
     if n < 0:
         # children lookup
         return _childrenspec(repo, subset, x, -n, order)
     ps = set()
     cl = repo.changelog
     for r in getset(repo, fullreposet(repo), x):
         for i in range(n):
             try:
                 r = cl.parentrevs(r)[0]
             except error.WdirUnsupported:
                 r = repo[r].p1().rev()
         ps.add(r)
     return subset & ps
 
 
 @predicate(b'author(string)', safe=True, weight=10)
 def author(repo, subset, x):
     """Alias for ``user(string)``."""
     # i18n: "author" is a keyword
     n = getstring(x, _(b"author requires a string"))
     kind, pattern, matcher = _substringmatcher(n, casesensitive=False)
     return subset.filter(
         lambda x: matcher(repo[x].user()), condrepr=(b'<user %r>', n)
     )
 
 
 @predicate(b'bisect(string)', safe=True)
 def bisect(repo, subset, x):
     """Changesets marked in the specified bisect status:
 
     - ``good``, ``bad``, ``skip``: csets explicitly marked as good/bad/skip
     - ``goods``, ``bads``      : csets topologically good/bad
     - ``range``              : csets taking part in the bisection
     - ``pruned``             : csets that are goods, bads or skipped
     - ``untested``           : csets whose fate is yet unknown
     - ``ignored``            : csets ignored due to DAG topology
     - ``current``            : the cset currently being bisected
     """
     # i18n: "bisect" is a keyword
     status = getstring(x, _(b"bisect requires a string")).lower()
     state = set(hbisect.get(repo, status))
     return subset & state
 
 
 # Backward-compatibility
 # - no help entry so that we do not advertise it any more
 @predicate(b'bisected', safe=True)
 def bisected(repo, subset, x):
     return bisect(repo, subset, x)
 
 
 @predicate(b'bookmark([name])', safe=True)
 def bookmark(repo, subset, x):
     """The named bookmark or all bookmarks.
 
     Pattern matching is supported for `name`. See :hg:`help revisions.patterns`.
     """
     # i18n: "bookmark" is a keyword
     args = getargs(x, 0, 1, _(b'bookmark takes one or no arguments'))
     if args:
         bm = getstring(
             args[0],
             # i18n: "bookmark" is a keyword
             _(b'the argument to bookmark must be a string'),
         )
         kind, pattern, matcher = stringutil.stringmatcher(bm)
         bms = set()
         if kind == b'literal':
             if bm == pattern:
                 pattern = repo._bookmarks.expandname(pattern)
             bmrev = repo._bookmarks.get(pattern, None)
             if not bmrev:
                 raise error.RepoLookupError(
                     _(b"bookmark '%s' does not exist") % pattern
                 )
             bms.add(repo[bmrev].rev())
         else:
             matchrevs = set()
             for name, bmrev in repo._bookmarks.items():
                 if matcher(name):
                     matchrevs.add(bmrev)
             for bmrev in matchrevs:
                 bms.add(repo[bmrev].rev())
     else:
         bms = {repo[r].rev() for r in repo._bookmarks.values()}
     bms -= {nullrev}
     return subset & bms
 
 
 @predicate(b'branch(string or set)', safe=True, weight=10)
 def branch(repo, subset, x):
     """
     All changesets belonging to the given branch or the branches of the given
     changesets.
 
     Pattern matching is supported for `string`. See
     :hg:`help revisions.patterns`.
     """
     getbi = repo.revbranchcache().branchinfo
 
     def getbranch(r):
         try:
             return getbi(r)[0]
         except error.WdirUnsupported:
             return repo[r].branch()
 
     try:
         b = getstring(x, b'')
     except error.ParseError:
         # not a string, but another revspec, e.g. tip()
         pass
     else:
         kind, pattern, matcher = stringutil.stringmatcher(b)
         if kind == b'literal':
             # note: falls through to the revspec case if no branch with
             # this name exists and pattern kind is not specified explicitly
             if repo.branchmap().hasbranch(pattern):
                 return subset.filter(
                     lambda r: matcher(getbranch(r)),
                     condrepr=(b'<branch %r>', b),
                 )
             if b.startswith(b'literal:'):
                 raise error.RepoLookupError(
                     _(b"branch '%s' does not exist") % pattern
                 )
         else:
             return subset.filter(
                 lambda r: matcher(getbranch(r)), condrepr=(b'<branch %r>', b)
             )
 
     s = getset(repo, fullreposet(repo), x)
     b = set()
     for r in s:
         b.add(getbranch(r))
     c = s.__contains__
     return subset.filter(
         lambda r: c(r) or getbranch(r) in b,
         condrepr=lambda: b'<branch %r>' % _sortedb(b),
     )
 
 
 @predicate(b'phasedivergent()', safe=True)
 def phasedivergent(repo, subset, x):
     """Mutable changesets marked as successors of public changesets.
 
     Only non-public and non-obsolete changesets can be `phasedivergent`.
     (EXPERIMENTAL)
     """
     # i18n: "phasedivergent" is a keyword
     getargs(x, 0, 0, _(b"phasedivergent takes no arguments"))
     phasedivergent = obsmod.getrevs(repo, b'phasedivergent')
     return subset & phasedivergent
 
 
 @predicate(b'bundle()', safe=True)
 def bundle(repo, subset, x):
     """Changesets in the bundle.
 
     Bundle must be specified by the -R option."""
 
     try:
         bundlerevs = repo.changelog.bundlerevs
     except AttributeError:
         raise error.Abort(_(b"no bundle provided - specify with -R"))
     return subset & bundlerevs
 
 
 def checkstatus(repo, subset, pat, field):
     """Helper for status-related revsets (adds, removes, modifies).
     The field parameter says which kind is desired.
     """
     hasset = matchmod.patkind(pat) == b'set'
 
     mcache = [None]
 
     def matches(x):
         c = repo[x]
         if not mcache[0] or hasset:
             mcache[0] = matchmod.match(repo.root, repo.getcwd(), [pat], ctx=c)
         m = mcache[0]
         fname = None
 
         assert m is not None  # help pytype
         if not m.anypats() and len(m.files()) == 1:
             fname = m.files()[0]
         if fname is not None:
             if fname not in c.files():
                 return False
         else:
             if not any(m(f) for f in c.files()):
                 return False
         files = getattr(repo.status(c.p1().node(), c.node()), field)
         if fname is not None:
             if fname in files:
                 return True
         else:
             if any(m(f) for f in files):
                 return True
 
     return subset.filter(
         matches, condrepr=(b'<status.%s %r>', pycompat.sysbytes(field), pat)
     )
 
 
 def _children(repo, subset, parentset):
     if not parentset:
         return baseset()
     cs = set()
     pr = repo.changelog.parentrevs
     minrev = parentset.min()
     for r in subset:
         if r <= minrev:
             continue
         p1, p2 = pr(r)
         if p1 in parentset:
             cs.add(r)
         if p2 != nullrev and p2 in parentset:
             cs.add(r)
     return baseset(cs)
 
 
 @predicate(b'children(set)', safe=True)
 def children(repo, subset, x):
     """Child changesets of changesets in set."""
     s = getset(repo, fullreposet(repo), x)
     cs = _children(repo, subset, s)
     return subset & cs
 
 
 @predicate(b'closed()', safe=True, weight=10)
 def closed(repo, subset, x):
     """Changeset is closed."""
     # i18n: "closed" is a keyword
     getargs(x, 0, 0, _(b"closed takes no arguments"))
     return subset.filter(
         lambda r: repo[r].closesbranch(), condrepr=b'<branch closed>'
     )
 
 
 # for internal use
 @predicate(b'_commonancestorheads(set)', safe=True)
 def _commonancestorheads(repo, subset, x):
     # This is an internal method is for quickly calculating "heads(::x and
     # ::y)"
 
     # These greatest common ancestors are the same ones that the consensus bid
     # merge will find.
     startrevs = getset(repo, fullreposet(repo), x, order=anyorder)
 
     ancs = repo.changelog._commonancestorsheads(*list(startrevs))
     return subset & baseset(ancs)
 
 
 @predicate(b'commonancestors(set)', safe=True)
 def commonancestors(repo, subset, x):
     """Changesets that are ancestors of every changeset in set."""
     startrevs = getset(repo, fullreposet(repo), x, order=anyorder)
     if not startrevs:
         return baseset()
     for r in startrevs:
         subset &= dagop.revancestors(repo, baseset([r]))
     return subset
 
 
 @predicate(b'conflictlocal()', safe=True)
 def conflictlocal(repo, subset, x):
     """The local side of the merge, if currently in an unresolved merge.
 
     "merge" here includes merge conflicts from e.g. 'hg rebase' or 'hg graft'.
     """
     getargs(x, 0, 0, _(b"conflictlocal takes no arguments"))
     from . import mergestate as mergestatemod
 
     mergestate = mergestatemod.mergestate.read(repo)
     if mergestate.active() and repo.changelog.hasnode(mergestate.local):
         return subset & {repo.changelog.rev(mergestate.local)}
 
     return baseset()
 
 
 @predicate(b'conflictother()', safe=True)
 def conflictother(repo, subset, x):
     """The other side of the merge, if currently in an unresolved merge.
 
     "merge" here includes merge conflicts from e.g. 'hg rebase' or 'hg graft'.
     """
     getargs(x, 0, 0, _(b"conflictother takes no arguments"))
     from . import mergestate as mergestatemod
 
     mergestate = mergestatemod.mergestate.read(repo)
     if mergestate.active() and repo.changelog.hasnode(mergestate.other):
         return subset & {repo.changelog.rev(mergestate.other)}
 
     return baseset()
 
 
 @predicate(b'contains(pattern)', weight=100)
 def contains(repo, subset, x):
     """The revision's manifest contains a file matching pattern (but might not
     modify it). See :hg:`help patterns` for information about file patterns.
 
     The pattern without explicit kind like ``glob:`` is expected to be
     relative to the current directory and match against a file exactly
     for efficiency.
     """
     # i18n: "contains" is a keyword
     pat = getstring(x, _(b"contains requires a pattern"))
 
     def matches(x):
         if not matchmod.patkind(pat):
             pats = pathutil.canonpath(repo.root, repo.getcwd(), pat)
             if pats in repo[x]:
                 return True
         else:
             c = repo[x]
             m = matchmod.match(repo.root, repo.getcwd(), [pat], ctx=c)
             for f in c.manifest():
                 if m(f):
                     return True
         return False
 
     return subset.filter(matches, condrepr=(b'<contains %r>', pat))
 
 
 @predicate(b'converted([id])', safe=True)
 def converted(repo, subset, x):
     """Changesets converted from the given identifier in the old repository if
     present, or all converted changesets if no identifier is specified.
     """
 
     # There is exactly no chance of resolving the revision, so do a simple
     # string compare and hope for the best
 
     rev = None
     # i18n: "converted" is a keyword
     l = getargs(x, 0, 1, _(b'converted takes one or no arguments'))
     if l:
         # i18n: "converted" is a keyword
         rev = getstring(l[0], _(b'converted requires a revision'))
 
     def _matchvalue(r):
         source = repo[r].extra().get(b'convert_revision', None)
         return source is not None and (rev is None or source.startswith(rev))
 
     return subset.filter(
         lambda r: _matchvalue(r), condrepr=(b'<converted %r>', rev)
     )
 
 
 @predicate(b'date(interval)', safe=True, weight=10)
 def date(repo, subset, x):
     """Changesets within the interval, see :hg:`help dates`."""
     # i18n: "date" is a keyword
     ds = getstring(x, _(b"date requires a string"))
     dm = dateutil.matchdate(ds)
     return subset.filter(
         lambda x: dm(repo[x].date()[0]), condrepr=(b'<date %r>', ds)
     )
 
 
 @predicate(b'desc(string)', safe=True, weight=10)
 def desc(repo, subset, x):
     """Search commit message for string. The match is case-insensitive.
 
     Pattern matching is supported for `string`. See
     :hg:`help revisions.patterns`.
     """
     # i18n: "desc" is a keyword
     ds = getstring(x, _(b"desc requires a string"))
 
     kind, pattern, matcher = _substringmatcher(ds, casesensitive=False)
 
     return subset.filter(
         lambda r: matcher(repo[r].description()), condrepr=(b'<desc %r>', ds)
     )
 
 
 def _descendants(
     repo, subset, x, followfirst=False, startdepth=None, stopdepth=None
 ):
     roots = getset(repo, fullreposet(repo), x)
     if not roots:
         return baseset()
     s = dagop.revdescendants(repo, roots, followfirst, startdepth, stopdepth)
     return subset & s
 
 
 @predicate(b'descendants(set[, depth])', safe=True)
 def descendants(repo, subset, x):
     """Changesets which are descendants of changesets in set, including the
     given changesets themselves.
 
     If depth is specified, the result only includes changesets up to
     the specified generation.
     """
     # startdepth is for internal use only until we can decide the UI
     args = getargsdict(x, b'descendants', b'set depth startdepth')
     if b'set' not in args:
         # i18n: "descendants" is a keyword
         raise error.ParseError(_(b'descendants takes at least 1 argument'))
     startdepth = stopdepth = None
     if b'startdepth' in args:
         n = getinteger(
             args[b'startdepth'], b"descendants expects an integer startdepth"
         )
         if n < 0:
             raise error.ParseError(b"negative startdepth")
         startdepth = n
     if b'depth' in args:
         # i18n: "descendants" is a keyword
         n = getinteger(
             args[b'depth'], _(b"descendants expects an integer depth")
         )
         if n < 0:
             raise error.ParseError(_(b"negative depth"))
         stopdepth = n + 1
     return _descendants(
         repo, subset, args[b'set'], startdepth=startdepth, stopdepth=stopdepth
     )
 
 
 @predicate(b'_firstdescendants', safe=True)
 def _firstdescendants(repo, subset, x):
     # ``_firstdescendants(set)``
     # Like ``descendants(set)`` but follows only the first parents.
     return _descendants(repo, subset, x, followfirst=True)
 
 
 @predicate(b'destination([set])', safe=True, weight=10)
 def destination(repo, subset, x):
     """Changesets that were created by a graft, transplant or rebase operation,
     with the given revisions specified as the source.  Omitting the optional set
     is the same as passing all().
     """
     if x is not None:
         sources = getset(repo, fullreposet(repo), x)
     else:
         sources = fullreposet(repo)
 
     dests = set()
 
     # subset contains all of the possible destinations that can be returned, so
     # iterate over them and see if their source(s) were provided in the arg set.
     # Even if the immediate src of r is not in the arg set, src's source (or
     # further back) may be.  Scanning back further than the immediate src allows
     # transitive transplants and rebases to yield the same results as transitive
     # grafts.
     for r in subset:
         src = _getrevsource(repo, r)
         lineage = None
 
         while src is not None:
             if lineage is None:
                 lineage = list()
 
             lineage.append(r)
 
             # The visited lineage is a match if the current source is in the arg
             # set.  Since every candidate dest is visited by way of iterating
             # subset, any dests further back in the lineage will be tested by a
             # different iteration over subset.  Likewise, if the src was already
             # selected, the current lineage can be selected without going back
             # further.
             if src in sources or src in dests:
                 dests.update(lineage)
                 break
 
             r = src
             src = _getrevsource(repo, r)
 
     return subset.filter(
         dests.__contains__,
         condrepr=lambda: b'<destination %r>' % _sortedb(dests),
     )
 
 
 @predicate(b'diffcontains(pattern)', weight=110)
 def diffcontains(repo, subset, x):
     """Search revision differences for when the pattern was added or removed.
 
     The pattern may be a substring literal or a regular expression. See
     :hg:`help revisions.patterns`.
     """
     args = getargsdict(x, b'diffcontains', b'pattern')
     if b'pattern' not in args:
         # i18n: "diffcontains" is a keyword
         raise error.ParseError(_(b'diffcontains takes at least 1 argument'))
 
     pattern = getstring(
         args[b'pattern'], _(b'diffcontains requires a string pattern')
     )
     regexp = stringutil.substringregexp(pattern, re.M)
 
     # TODO: add support for file pattern and --follow. For example,
     # diffcontains(pattern[, set]) where set may be file(pattern) or
     # follow(pattern), and we'll eventually add a support for narrowing
     # files by revset?
     fmatch = matchmod.always()
 
     def makefilematcher(ctx):
         return fmatch
 
     # TODO: search in a windowed way
     searcher = grepmod.grepsearcher(repo.ui, repo, regexp, diff=True)
 
     def testdiff(rev):
         # consume the generator to discard revfiles/matches cache
         found = False
         for fn, ctx, pstates, states in searcher.searchfiles(
             baseset([rev]), makefilematcher
         ):
             if next(grepmod.difflinestates(pstates, states), None):
                 found = True
         return found
 
     return subset.filter(testdiff, condrepr=(b'<diffcontains %r>', pattern))
 
 
 @predicate(b'contentdivergent()', safe=True)
 def contentdivergent(repo, subset, x):
     """
     Final successors of changesets with an alternative set of final
     successors. (EXPERIMENTAL)
     """
     # i18n: "contentdivergent" is a keyword
     getargs(x, 0, 0, _(b"contentdivergent takes no arguments"))
     contentdivergent = obsmod.getrevs(repo, b'contentdivergent')
     return subset & contentdivergent
 
 
 @predicate(b'expectsize(set[, size])', safe=True, takeorder=True)
 def expectsize(repo, subset, x, order):
     """Return the given revset if size matches the revset size.
     Abort if the revset doesn't expect given size.
     size can either be an integer range or an integer.
 
     For example, ``expectsize(0:1, 3:5)`` will abort as revset size is 2 and
     2 is not between 3 and 5 inclusive."""
 
     args = getargsdict(x, b'expectsize', b'set size')
     minsize = 0
     maxsize = len(repo) + 1
     err = b''
     if b'size' not in args or b'set' not in args:
         raise error.ParseError(_(b'invalid set of arguments'))
     minsize, maxsize = getintrange(
         args[b'size'],
         _(b'expectsize requires a size range or a positive integer'),
         _(b'size range bounds must be integers'),
         minsize,
         maxsize,
     )
     if minsize < 0 or maxsize < 0:
         raise error.ParseError(_(b'negative size'))
     rev = getset(repo, fullreposet(repo), args[b'set'], order=order)
     if minsize != maxsize and (len(rev) < minsize or len(rev) > maxsize):
         err = _(b'revset size mismatch. expected between %d and %d, got %d') % (
             minsize,
             maxsize,
             len(rev),
         )
     elif minsize == maxsize and len(rev) != minsize:
         err = _(b'revset size mismatch. expected %d, got %d') % (
             minsize,
             len(rev),
         )
     if err:
         raise error.RepoLookupError(err)
     if order == followorder:
         return subset & rev
     else:
         return rev & subset
 
 
 @predicate(b'extdata(source)', safe=False, weight=100)
 def extdata(repo, subset, x):
     """Changesets in the specified extdata source. (EXPERIMENTAL)"""
     # i18n: "extdata" is a keyword
     args = getargsdict(x, b'extdata', b'source')
     source = getstring(
         args.get(b'source'),
         # i18n: "extdata" is a keyword
         _(b'extdata takes at least 1 string argument'),
     )
     data = scmutil.extdatasource(repo, source)
     return subset & baseset(data)
 
 
 @predicate(b'extinct()', safe=True)
 def extinct(repo, subset, x):
     """Obsolete changesets with obsolete descendants only. (EXPERIMENTAL)"""
     # i18n: "extinct" is a keyword
     getargs(x, 0, 0, _(b"extinct takes no arguments"))
     extincts = obsmod.getrevs(repo, b'extinct')
     return subset & extincts
 
 
 @predicate(b'extra(label, [value])', safe=True)
 def extra(repo, subset, x):
     """Changesets with the given label in the extra metadata, with the given
     optional value.
 
     Pattern matching is supported for `value`. See
     :hg:`help revisions.patterns`.
     """
     args = getargsdict(x, b'extra', b'label value')
     if b'label' not in args:
         # i18n: "extra" is a keyword
         raise error.ParseError(_(b'extra takes at least 1 argument'))
     # i18n: "extra" is a keyword
     label = getstring(
         args[b'label'], _(b'first argument to extra must be a string')
     )
     value = None
 
     if b'value' in args:
         # i18n: "extra" is a keyword
         value = getstring(
             args[b'value'], _(b'second argument to extra must be a string')
         )
         kind, value, matcher = stringutil.stringmatcher(value)
 
     def _matchvalue(r):
         extra = repo[r].extra()
         return label in extra and (value is None or matcher(extra[label]))
 
     return subset.filter(
         lambda r: _matchvalue(r), condrepr=(b'<extra[%r] %r>', label, value)
     )
 
 
 @predicate(b'filelog(pattern)', safe=True)
 def filelog(repo, subset, x):
     """Changesets connected to the specified filelog.
 
     For performance reasons, visits only revisions mentioned in the file-level
     filelog, rather than filtering through all changesets (much faster, but
     doesn't include deletes or duplicate changes). For a slower, more accurate
     result, use ``file()``.
 
     The pattern without explicit kind like ``glob:`` is expected to be
     relative to the current directory and match against a file exactly
     for efficiency.
     """
 
     # i18n: "filelog" is a keyword
     pat = getstring(x, _(b"filelog requires a pattern"))
     s = set()
     cl = repo.changelog
 
     if not matchmod.patkind(pat):
         f = pathutil.canonpath(repo.root, repo.getcwd(), pat)
         files = [f]
     else:
         m = matchmod.match(repo.root, repo.getcwd(), [pat], ctx=repo[None])
         files = (f for f in repo[None] if m(f))
 
     for f in files:
         fl = repo.file(f)
         known = {}
         scanpos = 0
         for fr in list(fl):
             fn = fl.node(fr)
             if fn in known:
                 s.add(known[fn])
                 continue
 
             lr = fl.linkrev(fr)
             if lr in cl:
                 s.add(lr)
             elif scanpos is not None:
                 # lowest matching changeset is filtered, scan further
                 # ahead in changelog
                 start = max(lr, scanpos) + 1
                 scanpos = None
                 for r in cl.revs(start):
                     # minimize parsing of non-matching entries
                     if f in cl.revision(r) and f in cl.readfiles(r):
                         try:
                             # try to use manifest delta fastpath
                             n = repo[r].filenode(f)
                             if n not in known:
                                 if n == fn:
                                     s.add(r)
                                     scanpos = r
                                     break
                                 else:
                                     known[n] = r
                         except error.ManifestLookupError:
                             # deletion in changelog
                             continue
 
     return subset & s
 
 
 @predicate(b'first(set, [n])', safe=True, takeorder=True, weight=0)
 def first(repo, subset, x, order):
     """An alias for limit()."""
     return limit(repo, subset, x, order)
 
 
 def _follow(repo, subset, x, name, followfirst=False):
     args = getargsdict(x, name, b'file startrev')
     revs = None
     if b'startrev' in args:
         revs = getset(repo, fullreposet(repo), args[b'startrev'])
     if b'file' in args:
         x = getstring(args[b'file'], _(b"%s expected a pattern") % name)
         if revs is None:
             revs = [None]
         fctxs = []
         for r in revs:
             ctx = mctx = repo[r]
             if r is None:
                 ctx = repo[b'.']
             m = matchmod.match(
                 repo.root, repo.getcwd(), [x], ctx=mctx, default=b'path'
             )
             fctxs.extend(ctx[f].introfilectx() for f in ctx.manifest().walk(m))
         s = dagop.filerevancestors(fctxs, followfirst)
     else:
         if revs is None:
             revs = baseset([repo[b'.'].rev()])
         s = dagop.revancestors(repo, revs, followfirst)
 
     return subset & s
 
 
 @predicate(b'follow([file[, startrev]])', safe=True)
 def follow(repo, subset, x):
     """
     An alias for ``::.`` (ancestors of the working directory's first parent).
     If file pattern is specified, the histories of files matching given
     pattern in the revision given by startrev are followed, including copies.
     """
     return _follow(repo, subset, x, b'follow')
 
 
 @predicate(b'_followfirst', safe=True)
 def _followfirst(repo, subset, x):
     # ``followfirst([file[, startrev]])``
     # Like ``follow([file[, startrev]])`` but follows only the first parent
     # of every revisions or files revisions.
     return _follow(repo, subset, x, b'_followfirst', followfirst=True)
 
 
 @predicate(
     b'followlines(file, fromline:toline[, startrev=., descend=False])',
     safe=True,
 )
 def followlines(repo, subset, x):
     """Changesets modifying `file` in line range ('fromline', 'toline').
 
     Line range corresponds to 'file' content at 'startrev' and should hence be
     consistent with file size. If startrev is not specified, working directory's
     parent is used.
 
     By default, ancestors of 'startrev' are returned. If 'descend' is True,
     descendants of 'startrev' are returned though renames are (currently) not
     followed in this direction.
     """
     args = getargsdict(x, b'followlines', b'file *lines startrev descend')
     if len(args[b'lines']) != 1:
         raise error.ParseError(_(b"followlines requires a line range"))
 
     rev = b'.'
     if b'startrev' in args:
         revs = getset(repo, fullreposet(repo), args[b'startrev'])
         if len(revs) != 1:
             raise error.ParseError(
                 # i18n: "followlines" is a keyword
                 _(b"followlines expects exactly one revision")
             )
         rev = revs.last()
 
     pat = getstring(args[b'file'], _(b"followlines requires a pattern"))
     # i18n: "followlines" is a keyword
     msg = _(b"followlines expects exactly one file")
     fname = scmutil.parsefollowlinespattern(repo, rev, pat, msg)
     fromline, toline = util.processlinerange(
         *getintrange(
             args[b'lines'][0],
             # i18n: "followlines" is a keyword
             _(b"followlines expects a line number or a range"),
             _(b"line range bounds must be integers"),
         )
     )
 
     fctx = repo[rev].filectx(fname)
     descend = False
     if b'descend' in args:
         descend = getboolean(
             args[b'descend'],
             # i18n: "descend" is a keyword
             _(b"descend argument must be a boolean"),
         )
     if descend:
         rs = generatorset(
             (
                 c.rev()
                 for c, _linerange in dagop.blockdescendants(
                     fctx, fromline, toline
                 )
             ),
             iterasc=True,
         )
     else:
         rs = generatorset(
             (
                 c.rev()
                 for c, _linerange in dagop.blockancestors(
                     fctx, fromline, toline
                 )
             ),
             iterasc=False,
         )
     return subset & rs
 
 
 @predicate(b'nodefromfile(path)')
 def nodefromfile(repo, subset, x):
     """Read a list of nodes from the file at `path`.
 
     This applies `id(LINE)` to each line of the file.
 
     This is useful when the amount of nodes you need to specify gets too large
     for the command line.
     """
     path = getstring(x, _(b"nodefromfile require a file path"))
     listed_rev = set()
     try:
         with pycompat.open(path, 'rb') as f:
             for line in f:
                 n = line.strip()
                 rn = _node(repo, n)
                 if rn is not None:
                     listed_rev.add(rn)
     except IOError as exc:
         m = _(b'cannot open nodes file "%s": %s')
         m %= (path, encoding.strtolocal(exc.strerror))
         raise error.Abort(m)
     return subset & baseset(listed_rev)
 
 
 @predicate(b'all()', safe=True)
 def getall(repo, subset, x):
     """All changesets, the same as ``0:tip``."""
     # i18n: "all" is a keyword
     getargs(x, 0, 0, _(b"all takes no arguments"))
     return subset & spanset(repo)  # drop "null" if any
 
 
 @predicate(b'grep(regex)', weight=10)
 def grep(repo, subset, x):
     """Like ``keyword(string)`` but accepts a regex. Use ``grep(r'...')``
     to ensure special escape characters are handled correctly. Unlike
     ``keyword(string)``, the match is case-sensitive.
     """
     try:
         # i18n: "grep" is a keyword
         gr = re.compile(getstring(x, _(b"grep requires a string")))
     except re.error as e:
         raise error.ParseError(
             _(b'invalid match pattern: %s') % stringutil.forcebytestr(e)
         )
 
     def matches(x):
         c = repo[x]
         for e in c.files() + [c.user(), c.description()]:
             if gr.search(e):
                 return True
         return False
 
     return subset.filter(matches, condrepr=(b'<grep %r>', gr.pattern))
 
 
 @predicate(b'_matchfiles', safe=True)
 def _matchfiles(repo, subset, x):
     # _matchfiles takes a revset list of prefixed arguments:
     #
     #   [p:foo, i:bar, x:baz]
     #
     # builds a match object from them and filters subset. Allowed
     # prefixes are 'p:' for regular patterns, 'i:' for include
     # patterns and 'x:' for exclude patterns. Use 'r:' prefix to pass
     # a revision identifier, or the empty string to reference the
     # working directory, from which the match object is
     # initialized. Use 'd:' to set the default matching mode, default
     # to 'glob'. At most one 'r:' and 'd:' argument can be passed.
 
     l = getargs(x, 1, -1, b"_matchfiles requires at least one argument")
     pats, inc, exc = [], [], []
     rev, default = None, None
     for arg in l:
         s = getstring(arg, b"_matchfiles requires string arguments")
         prefix, value = s[:2], s[2:]
         if prefix == b'p:':
             pats.append(value)
         elif prefix == b'i:':
             inc.append(value)
         elif prefix == b'x:':
             exc.append(value)
         elif prefix == b'r:':
             if rev is not None:
                 raise error.ParseError(
                     b'_matchfiles expected at most one revision'
                 )
             if value == b'':  # empty means working directory
                 rev = wdirrev
             else:
                 rev = value
         elif prefix == b'd:':
             if default is not None:
                 raise error.ParseError(
                     b'_matchfiles expected at most one default mode'
                 )
             default = value
         else:
             raise error.ParseError(b'invalid _matchfiles prefix: %s' % prefix)
     if not default:
         default = b'glob'
     hasset = any(matchmod.patkind(p) == b'set' for p in pats + inc + exc)
 
     mcache = [None]
 
     # This directly read the changelog data as creating changectx for all
     # revisions is quite expensive.
     getfiles = repo.changelog.readfiles
 
     def matches(x):
         if x == wdirrev:
             files = repo[x].files()
         else:
             files = getfiles(x)
 
         if not mcache[0] or (hasset and rev is None):
             r = x if rev is None else rev
             mcache[0] = matchmod.match(
                 repo.root,
                 repo.getcwd(),
                 pats,
                 include=inc,
                 exclude=exc,
                 ctx=repo[r],
                 default=default,
             )
         m = mcache[0]
 
         for f in files:
             if m(f):
                 return True
         return False
 
     return subset.filter(
         matches,
         condrepr=(
             b'<matchfiles patterns=%r, include=%r '
             b'exclude=%r, default=%r, rev=%r>',
             pats,
             inc,
             exc,
             default,
             rev,
         ),
     )
 
 
 @predicate(b'file(pattern)', safe=True, weight=10)
 def hasfile(repo, subset, x):
     """Changesets affecting files matched by pattern.
 
     For a faster but less accurate result, consider using ``filelog()``
     instead.
 
     This predicate uses ``glob:`` as the default kind of pattern.
     """
     # i18n: "file" is a keyword
     pat = getstring(x, _(b"file requires a pattern"))
     return _matchfiles(repo, subset, (b'string', b'p:' + pat))
 
 
 @predicate(b'head()', safe=True)
 def head(repo, subset, x):
     """Changeset is a named branch head."""
     # i18n: "head" is a keyword
     getargs(x, 0, 0, _(b"head takes no arguments"))
     hs = set()
     cl = repo.changelog
     for ls in repo.branchmap().iterheads():
         hs.update(cl.rev(h) for h in ls)
     return subset & baseset(hs)
 
 
 @predicate(b'heads(set)', safe=True, takeorder=True)
 def heads(repo, subset, x, order):
     """Members of set with no children in set."""
     # argument set should never define order
     if order == defineorder:
         order = followorder
     inputset = getset(repo, fullreposet(repo), x, order=order)
     wdirparents = None
     if wdirrev in inputset:
         # a bit slower, but not common so good enough for now
         wdirparents = [p.rev() for p in repo[None].parents()]
         inputset = set(inputset)
         inputset.discard(wdirrev)
     heads = repo.changelog.headrevs(inputset)
     if wdirparents is not None:
         heads.difference_update(wdirparents)
         heads.add(wdirrev)
     heads = baseset(heads)
     return subset & heads
 
 
 @predicate(b'hidden()', safe=True)
 def hidden(repo, subset, x):
     """Hidden changesets."""
     # i18n: "hidden" is a keyword
     getargs(x, 0, 0, _(b"hidden takes no arguments"))
     hiddenrevs = repoview.filterrevs(repo, b'visible')
     return subset & hiddenrevs
 
 
 @predicate(b'keyword(string)', safe=True, weight=10)
 def keyword(repo, subset, x):
     """Search commit message, user name, and names of changed files for
     string. The match is case-insensitive.
 
     For a regular expression or case sensitive search of these fields, use
     ``grep(regex)``.
     """
     # i18n: "keyword" is a keyword
     kw = encoding.lower(getstring(x, _(b"keyword requires a string")))
 
     def matches(r):
         c = repo[r]
         return any(
             kw in encoding.lower(t)
             for t in c.files() + [c.user(), c.description()]
         )
 
     return subset.filter(matches, condrepr=(b'<keyword %r>', kw))
 
 
 @predicate(b'limit(set[, n[, offset]])', safe=True, takeorder=True, weight=0)
 def limit(repo, subset, x, order):
     """First n members of set, defaulting to 1, starting from offset."""
     args = getargsdict(x, b'limit', b'set n offset')
     if b'set' not in args:
         # i18n: "limit" is a keyword
         raise error.ParseError(_(b"limit requires one to three arguments"))
     # i18n: "limit" is a keyword
     lim = getinteger(args.get(b'n'), _(b"limit expects a number"), default=1)
     if lim < 0:
         raise error.ParseError(_(b"negative number to select"))
     # i18n: "limit" is a keyword
     ofs = getinteger(
         args.get(b'offset'), _(b"limit expects a number"), default=0
     )
     if ofs < 0:
         raise error.ParseError(_(b"negative offset"))
     os = getset(repo, fullreposet(repo), args[b'set'])
     ls = os.slice(ofs, ofs + lim)
     if order == followorder and lim > 1:
         return subset & ls
     return ls & subset
 
 
 @predicate(b'last(set, [n])', safe=True, takeorder=True)
 def last(repo, subset, x, order):
     """Last n members of set, defaulting to 1."""
     # i18n: "last" is a keyword
     l = getargs(x, 1, 2, _(b"last requires one or two arguments"))
     lim = 1
     if len(l) == 2:
         # i18n: "last" is a keyword
         lim = getinteger(l[1], _(b"last expects a number"))
     if lim < 0:
         raise error.ParseError(_(b"negative number to select"))
     os = getset(repo, fullreposet(repo), l[0])
     os.reverse()
     ls = os.slice(0, lim)
     if order == followorder and lim > 1:
         return subset & ls
     ls.reverse()
     return ls & subset
 
 
 @predicate(b'max(set)', safe=True)
 def maxrev(repo, subset, x):
     """Changeset with highest revision number in set."""
     os = getset(repo, fullreposet(repo), x)
     try:
         m = os.max()
         if m in subset:
             return baseset([m], datarepr=(b'<max %r, %r>', subset, os))
     except ValueError:
         # os.max() throws a ValueError when the collection is empty.
         # Same as python's max().
         pass
     return baseset(datarepr=(b'<max %r, %r>', subset, os))
 
 
 @predicate(b'merge()', safe=True)
 def merge(repo, subset, x):
     """Changeset is a merge changeset."""
     # i18n: "merge" is a keyword
     getargs(x, 0, 0, _(b"merge takes no arguments"))
     cl = repo.changelog
 
     def ismerge(r):
         try:
             return cl.parentrevs(r)[1] != nullrev
         except error.WdirUnsupported:
             return bool(repo[r].p2())
 
     return subset.filter(ismerge, condrepr=b'<merge>')
 
 
 @predicate(b'branchpoint()', safe=True)
 def branchpoint(repo, subset, x):
     """Changesets with more than one child."""
     # i18n: "branchpoint" is a keyword
     getargs(x, 0, 0, _(b"branchpoint takes no arguments"))
     cl = repo.changelog
     if not subset:
         return baseset()
     # XXX this should be 'parentset.min()' assuming 'parentset' is a smartset
     # (and if it is not, it should.)
     baserev = min(subset)
     parentscount = [0] * (len(repo) - baserev)
     for r in cl.revs(start=baserev + 1):
         for p in cl.parentrevs(r):
             if p >= baserev:
                 parentscount[p - baserev] += 1
     return subset.filter(
         lambda r: parentscount[r - baserev] > 1, condrepr=b'<branchpoint>'
     )
 
 
 @predicate(b'min(set)', safe=True)
 def minrev(repo, subset, x):
     """Changeset with lowest revision number in set."""
     os = getset(repo, fullreposet(repo), x)
     try:
         m = os.min()
         if m in subset:
             return baseset([m], datarepr=(b'<min %r, %r>', subset, os))
     except ValueError:
         # os.min() throws a ValueError when the collection is empty.
         # Same as python's min().
         pass
     return baseset(datarepr=(b'<min %r, %r>', subset, os))
 
 
 @predicate(b'modifies(pattern)', safe=True, weight=30)
 def modifies(repo, subset, x):
     """Changesets modifying files matched by pattern.
 
     The pattern without explicit kind like ``glob:`` is expected to be
     relative to the current directory and match against a file or a
     directory.
     """
     # i18n: "modifies" is a keyword
     pat = getstring(x, _(b"modifies requires a pattern"))
     return checkstatus(repo, subset, pat, 'modified')
 
 
 @predicate(b'named(namespace)')
 def named(repo, subset, x):
     """The changesets in a given namespace.
 
     Pattern matching is supported for `namespace`. See
     :hg:`help revisions.patterns`.
     """
     # i18n: "named" is a keyword
     args = getargs(x, 1, 1, _(b'named requires a namespace argument'))
 
     ns = getstring(
         args[0],
         # i18n: "named" is a keyword
         _(b'the argument to named must be a string'),
     )
     kind, pattern, matcher = stringutil.stringmatcher(ns)
     namespaces = set()
     if kind == b'literal':
         if pattern not in repo.names:
             raise error.RepoLookupError(
                 _(b"namespace '%s' does not exist") % ns
             )
         namespaces.add(repo.names[pattern])
     else:
         for name, ns in repo.names.items():
             if matcher(name):
                 namespaces.add(ns)
 
     names = set()
     for ns in namespaces:
         for name in ns.listnames(repo):
             if name not in ns.deprecated:
                 names.update(repo[n].rev() for n in ns.nodes(repo, name))
 
     names -= {nullrev}
     return subset & names
 
 
 def _node(repo, n):
     """process a node input"""
     rn = None
     if len(n) == 2 * repo.nodeconstants.nodelen:
         try:
             rn = repo.changelog.rev(bin(n))
         except error.WdirUnsupported:
             rn = wdirrev
         except (binascii.Error, LookupError):
             rn = None
     else:
         try:
             pm = scmutil.resolvehexnodeidprefix(repo, n)
             if pm is not None:
                 rn = repo.changelog.rev(pm)
         except LookupError:
             pass
         except error.WdirUnsupported:
             rn = wdirrev
     return rn
 
 
 @predicate(b'id(string)', safe=True)
 def node_(repo, subset, x):
     """Revision non-ambiguously specified by the given hex string prefix."""
     # i18n: "id" is a keyword
     l = getargs(x, 1, 1, _(b"id requires one argument"))
     # i18n: "id" is a keyword
     n = getstring(l[0], _(b"id requires a string"))
     rn = _node(repo, n)
 
     if rn is None:
         return baseset()
     result = baseset([rn])
     return result & subset
 
 
 @predicate(b'none()', safe=True)
 def none(repo, subset, x):
     """No changesets."""
     # i18n: "none" is a keyword
     getargs(x, 0, 0, _(b"none takes no arguments"))
     return baseset()
 
 
 @predicate(b'obsolete()', safe=True)
 def obsolete(repo, subset, x):
     """Mutable changeset with a newer version. (EXPERIMENTAL)"""
     # i18n: "obsolete" is a keyword
     getargs(x, 0, 0, _(b"obsolete takes no arguments"))
     obsoletes = obsmod.getrevs(repo, b'obsolete')
     return subset & obsoletes
 
 
 @predicate(b'only(set, [set])', safe=True)
 def only(repo, subset, x):
     """Changesets that are ancestors of the first set that are not ancestors
     of any other head in the repo. If a second set is specified, the result
     is ancestors of the first set that are not ancestors of the second set
     (i.e. ::<set1> - ::<set2>).
     """
     cl = repo.changelog
     # i18n: "only" is a keyword
     args = getargs(x, 1, 2, _(b'only takes one or two arguments'))
     include = getset(repo, fullreposet(repo), args[0])
     if len(args) == 1:
         if not include:
             return baseset()
 
         descendants = set(dagop.revdescendants(repo, include, False))
         exclude = [
             rev
             for rev in cl.headrevs()
             if not rev in descendants and not rev in include
         ]
     else:
         exclude = getset(repo, fullreposet(repo), args[1])
 
     results = set(cl.findmissingrevs(common=exclude, heads=include))
     # XXX we should turn this into a baseset instead of a set, smartset may do
     # some optimizations from the fact this is a baseset.
     return subset & results
 
 
 @predicate(b'origin([set])', safe=True)
 def origin(repo, subset, x):
     """
     Changesets that were specified as a source for the grafts, transplants or
     rebases that created the given revisions.  Omitting the optional set is the
     same as passing all().  If a changeset created by these operations is itself
     specified as a source for one of these operations, only the source changeset
     for the first operation is selected.
     """
     if x is not None:
         dests = getset(repo, fullreposet(repo), x)
     else:
         dests = fullreposet(repo)
 
     def _firstsrc(rev):
         src = _getrevsource(repo, rev)
         if src is None:
             return None
 
         while True:
             prev = _getrevsource(repo, src)
 
             if prev is None:
                 return src
             src = prev
 
     o = {_firstsrc(r) for r in dests}
     o -= {None}
     # XXX we should turn this into a baseset instead of a set, smartset may do
     # some optimizations from the fact this is a baseset.
     return subset & o
 
 
 @predicate(b'outgoing([path])', safe=False, weight=10)
 def outgoing(repo, subset, x):
     """Changesets not found in the specified destination repository, or the
     default push location.
 
     If the location resolve to multiple repositories, the union of all
     outgoing changeset will be used.
     """
     # Avoid cycles.
     from . import (
         discovery,
         hg,
     )
 
     # i18n: "outgoing" is a keyword
     l = getargs(x, 0, 1, _(b"outgoing takes one or no arguments"))
     # i18n: "outgoing" is a keyword
     dest = (
         l and getstring(l[0], _(b"outgoing requires a repository path")) or b''
     )
     if dest:
         dests = [dest]
     else:
         dests = []
     missing = set()
     for path in urlutil.get_push_paths(repo, repo.ui, dests):
         branches = path.branch, []
 
         revs, checkout = hg.addbranchrevs(repo, repo, branches, [])
         if revs:
             revs = [repo.lookup(rev) for rev in revs]
         other = hg.peer(repo, {}, path)
         try:
             with repo.ui.silent():
                 outgoing = discovery.findcommonoutgoing(
                     repo, other, onlyheads=revs
                 )
         finally:
             other.close()
         missing.update(outgoing.missing)
     cl = repo.changelog
     o = {cl.rev(r) for r in missing}
     return subset & o
 
 
 @predicate(b'p1([set])', safe=True)
 def p1(repo, subset, x):
     """First parent of changesets in set, or the working directory."""
     if x is None:
         p = repo[x].p1().rev()
         if p >= 0:
             return subset & baseset([p])
         return baseset()
 
     ps = set()
     cl = repo.changelog
     for r in getset(repo, fullreposet(repo), x):
         try:
             ps.add(cl.parentrevs(r)[0])
         except error.WdirUnsupported:
             ps.add(repo[r].p1().rev())
     ps -= {nullrev}
     # XXX we should turn this into a baseset instead of a set, smartset may do
     # some optimizations from the fact this is a baseset.
     return subset & ps
 
 
 @predicate(b'p2([set])', safe=True)
 def p2(repo, subset, x):
     """Second parent of changesets in set, or the working directory."""
     if x is None:
         ps = repo[x].parents()
         try:
             p = ps[1].rev()
             if p >= 0:
                 return subset & baseset([p])
             return baseset()
         except IndexError:
             return baseset()
 
     ps = set()
     cl = repo.changelog
     for r in getset(repo, fullreposet(repo), x):
         try:
             ps.add(cl.parentrevs(r)[1])
         except error.WdirUnsupported:
             parents = repo[r].parents()
             if len(parents) == 2:
                 ps.add(parents[1])
     ps -= {nullrev}
     # XXX we should turn this into a baseset instead of a set, smartset may do
     # some optimizations from the fact this is a baseset.
     return subset & ps
 
 
 def parentpost(repo, subset, x, order):
     return p1(repo, subset, x)
 
 
 @predicate(b'parents([set])', safe=True)
 def parents(repo, subset, x):
     """
     The set of all parents for all changesets in set, or the working directory.
     """
     if x is None:
         ps = {p.rev() for p in repo[x].parents()}
     else:
         ps = set()
         cl = repo.changelog
         up = ps.update
         parentrevs = cl.parentrevs
         for r in getset(repo, fullreposet(repo), x):
             try:
                 up(parentrevs(r))
             except error.WdirUnsupported:
                 up(p.rev() for p in repo[r].parents())
     ps -= {nullrev}
     return subset & ps
 
 
 def _phase(repo, subset, *targets):
     """helper to select all rev in <targets> phases"""
     return repo._phasecache.getrevset(repo, targets, subset)
 
 
 @predicate(b'_phase(idx)', safe=True)
 def phase(repo, subset, x):
     l = getargs(x, 1, 1, b"_phase requires one argument")
     target = getinteger(l[0], b"_phase expects a number")
     return _phase(repo, subset, target)
 
 
 @predicate(b'draft()', safe=True)
 def draft(repo, subset, x):
     """Changeset in draft phase."""
     # i18n: "draft" is a keyword
     getargs(x, 0, 0, _(b"draft takes no arguments"))
     target = phases.draft
     return _phase(repo, subset, target)
 
 
 @predicate(b'secret()', safe=True)
 def secret(repo, subset, x):
     """Changeset in secret phase."""
     # i18n: "secret" is a keyword
     getargs(x, 0, 0, _(b"secret takes no arguments"))
     target = phases.secret
     return _phase(repo, subset, target)
 
 
 @predicate(b'stack([revs])', safe=True)
 def stack(repo, subset, x):
     """Experimental revset for the stack of changesets or working directory
     parent. (EXPERIMENTAL)
     """
     if x is None:
         stacks = stackmod.getstack(repo)
     else:
         stacks = smartset.baseset([])
         for revision in getset(repo, fullreposet(repo), x):
             currentstack = stackmod.getstack(repo, revision)
             stacks = stacks + currentstack
 
     return subset & stacks
 
 
 def parentspec(repo, subset, x, n, order):
     """``set^0``
     The set.
     ``set^1`` (or ``set^``), ``set^2``
     First or second parent, respectively, of all changesets in set.
     """
     try:
         n = int(n[1])
         if n not in (0, 1, 2):
             raise ValueError
     except (TypeError, ValueError):
         raise error.ParseError(_(b"^ expects a number 0, 1, or 2"))
     ps = set()
     cl = repo.changelog
     for r in getset(repo, fullreposet(repo), x):
         if n == 0:
             ps.add(r)
         elif n == 1:
             try:
                 ps.add(cl.parentrevs(r)[0])
             except error.WdirUnsupported:
                 ps.add(repo[r].p1().rev())
         else:
             try:
                 parents = cl.parentrevs(r)
                 if parents[1] != nullrev:
                     ps.add(parents[1])
             except error.WdirUnsupported:
                 parents = repo[r].parents()
                 if len(parents) == 2:
                     ps.add(parents[1].rev())
     return subset & ps
 
 
 @predicate(b'present(set)', safe=True, takeorder=True)
 def present(repo, subset, x, order):
     """An empty set, if any revision in set isn't found; otherwise,
     all revisions in set.
 
     If any of specified revisions is not present in the local repository,
     the query is normally aborted. But this predicate allows the query
     to continue even in such cases.
     """
     try:
         return getset(repo, subset, x, order)
     except error.RepoLookupError:
         return baseset()
 
 
 # for internal use
 @predicate(b'_notpublic', safe=True)
 def _notpublic(repo, subset, x):
     getargs(x, 0, 0, b"_notpublic takes no arguments")
-    return _phase(repo, subset, phases.draft, phases.secret)
+    return _phase(repo, subset, *phases.not_public_phases)
 
 
 # for internal use
 @predicate(b'_phaseandancestors(phasename, set)', safe=True)
 def _phaseandancestors(repo, subset, x):
     # equivalent to (phasename() & ancestors(set)) but more efficient
     # phasename could be one of 'draft', 'secret', or '_notpublic'
     args = getargs(x, 2, 2, b"_phaseandancestors requires two arguments")
     phasename = getsymbol(args[0])
     s = getset(repo, fullreposet(repo), args[1])
 
     draft = phases.draft
     secret = phases.secret
     phasenamemap = {
         b'_notpublic': draft,
         b'draft': draft,  # follow secret's ancestors
         b'secret': secret,
     }
     if phasename not in phasenamemap:
         raise error.ParseError(b'%r is not a valid phasename' % phasename)
 
     minimalphase = phasenamemap[phasename]
     getphase = repo._phasecache.phase
 
     def cutfunc(rev):
         return getphase(repo, rev) < minimalphase
 
     revs = dagop.revancestors(repo, s, cutfunc=cutfunc)
 
     if phasename == b'draft':  # need to remove secret changesets
         revs = revs.filter(lambda r: getphase(repo, r) == draft)
     return subset & revs
 
 
 @predicate(b'public()', safe=True)
 def public(repo, subset, x):
     """Changeset in public phase."""
     # i18n: "public" is a keyword
     getargs(x, 0, 0, _(b"public takes no arguments"))
     return _phase(repo, subset, phases.public)
 
 
 @predicate(b'remote([id [,path]])', safe=False)
 def remote(repo, subset, x):
     """Local revision that corresponds to the given identifier in a
     remote repository, if present. Here, the '.' identifier is a
     synonym for the current local branch.
     """
 
     from . import hg  # avoid start-up nasties
 
     # i18n: "remote" is a keyword
     l = getargs(x, 0, 2, _(b"remote takes zero, one, or two arguments"))
 
     q = b'.'
     if len(l) > 0:
         # i18n: "remote" is a keyword
         q = getstring(l[0], _(b"remote requires a string id"))
     if q == b'.':
         q = repo[b'.'].branch()
 
     dest = b''
     if len(l) > 1:
         # i18n: "remote" is a keyword
         dest = getstring(l[1], _(b"remote requires a repository path"))
     if not dest:
         dest = b'default'
     path = urlutil.get_unique_pull_path_obj(b'remote', repo.ui, dest)
 
     other = hg.peer(repo, {}, path)
     n = other.lookup(q)
     if n in repo:
         r = repo[n].rev()
         if r in subset:
             return baseset([r])
     return baseset()
 
 
 @predicate(b'removes(pattern)', safe=True, weight=30)
 def removes(repo, subset, x):
     """Changesets which remove files matching pattern.
 
     The pattern without explicit kind like ``glob:`` is expected to be
     relative to the current directory and match against a file or a
     directory.
     """
     # i18n: "removes" is a keyword
     pat = getstring(x, _(b"removes requires a pattern"))
     return checkstatus(repo, subset, pat, 'removed')
 
 
 @predicate(b'rev(number)', safe=True)
 def rev(repo, subset, x):
     """Revision with the given numeric identifier."""
     try:
         return _rev(repo, subset, x)
     except error.RepoLookupError:
         return baseset()
 
 
 @predicate(b'_rev(number)', safe=True)
 def _rev(repo, subset, x):
     # internal version of "rev(x)" that raise error if "x" is invalid
     # i18n: "rev" is a keyword
     l = getargs(x, 1, 1, _(b"rev requires one argument"))
     try:
         # i18n: "rev" is a keyword
         l = int(getstring(l[0], _(b"rev requires a number")))
     except (TypeError, ValueError):
         # i18n: "rev" is a keyword
         raise error.ParseError(_(b"rev expects a number"))
     if l not in _virtualrevs:
         try:
             repo.changelog.node(l)  # check that the rev exists
         except IndexError:
             raise error.RepoLookupError(_(b"unknown revision '%d'") % l)
     return subset & baseset([l])
 
 
 @predicate(b'revset(set)', safe=True, takeorder=True)
 def revsetpredicate(repo, subset, x, order):
     """Strictly interpret the content as a revset.
 
     The content of this special predicate will be strictly interpreted as a
     revset. For example, ``revset(id(0))`` will be interpreted as "id(0)"
     without possible ambiguity with a "id(0)" bookmark or tag.
     """
     return getset(repo, subset, x, order)
 
 
 @predicate(b'matching(revision [, field])', safe=True)
 def matching(repo, subset, x):
     """Changesets in which a given set of fields match the set of fields in the
     selected revision or set.
 
     To match more than one field pass the list of fields to match separated
     by spaces (e.g. ``author description``).
 
     Valid fields are most regular revision fields and some special fields.
 
     Regular revision fields are ``description``, ``author``, ``branch``,
     ``date``, ``files``, ``phase``, ``parents``, ``substate``, ``user``
     and ``diff``.
     Note that ``author`` and ``user`` are synonyms. ``diff`` refers to the
     contents of the revision. Two revisions matching their ``diff`` will
     also match their ``files``.
 
     Special fields are ``summary`` and ``metadata``:
     ``summary`` matches the first line of the description.
     ``metadata`` is equivalent to matching ``description user date``
     (i.e. it matches the main metadata fields).
 
     ``metadata`` is the default field which is used when no fields are
     specified. You can match more than one field at a time.
     """
     # i18n: "matching" is a keyword
     l = getargs(x, 1, 2, _(b"matching takes 1 or 2 arguments"))
 
     revs = getset(repo, fullreposet(repo), l[0])
 
     fieldlist = [b'metadata']
     if len(l) > 1:
         fieldlist = getstring(
             l[1],
             # i18n: "matching" is a keyword
             _(b"matching requires a string as its second argument"),
         ).split()
 
     # Make sure that there are no repeated fields,
     # expand the 'special' 'metadata' field type
     # and check the 'files' whenever we check the 'diff'
     fields = []
     for field in fieldlist:
         if field == b'metadata':
             fields += [b'user', b'description', b'date']
         elif field == b'diff':
             # a revision matching the diff must also match the files
             # since matching the diff is very costly, make sure to
             # also match the files first
             fields += [b'files', b'diff']
         else:
             if field == b'author':
                 field = b'user'
             fields.append(field)
     fields = set(fields)
     if b'summary' in fields and b'description' in fields:
         # If a revision matches its description it also matches its summary
         fields.discard(b'summary')
 
     # We may want to match more than one field
     # Not all fields take the same amount of time to be matched
     # Sort the selected fields in order of increasing matching cost
     fieldorder = [
         b'phase',
         b'parents',
         b'user',
         b'date',
         b'branch',
         b'summary',
         b'files',
         b'description',
         b'substate',
         b'diff',
     ]
 
     def fieldkeyfunc(f):
         try:
             return fieldorder.index(f)
         except ValueError:
             # assume an unknown field is very costly
             return len(fieldorder)
 
     fields = list(fields)
     fields.sort(key=fieldkeyfunc)
 
     # Each field will be matched with its own "getfield" function
     # which will be added to the getfieldfuncs array of functions
     getfieldfuncs = []
     _funcs = {
         b'user': lambda r: repo[r].user(),
         b'branch': lambda r: repo[r].branch(),
         b'date': lambda r: repo[r].date(),
         b'description': lambda r: repo[r].description(),
         b'files': lambda r: repo[r].files(),
         b'parents': lambda r: repo[r].parents(),
         b'phase': lambda r: repo[r].phase(),
         b'substate': lambda r: repo[r].substate,
         b'summary': lambda r: repo[r].description().splitlines()[0],
         b'diff': lambda r: list(
             repo[r].diff(opts=diffutil.diffallopts(repo.ui, {b'git': True}))
         ),
     }
     for info in fields:
         getfield = _funcs.get(info, None)
         if getfield is None:
             raise error.ParseError(
                 # i18n: "matching" is a keyword
                 _(b"unexpected field name passed to matching: %s")
                 % info
             )
         getfieldfuncs.append(getfield)
     # convert the getfield array of functions into a "getinfo" function
     # which returns an array of field values (or a single value if there
     # is only one field to match)
     getinfo = lambda r: [f(r) for f in getfieldfuncs]
 
     def matches(x):
         for rev in revs:
             target = getinfo(rev)
             match = True
             for n, f in enumerate(getfieldfuncs):
                 if target[n] != f(x):
                     match = False
             if match:
                 return True
         return False
 
     return subset.filter(matches, condrepr=(b'<matching%r %r>', fields, revs))
 
 
 @predicate(b'reverse(set)', safe=True, takeorder=True, weight=0)
 def reverse(repo, subset, x, order):
     """Reverse order of set."""
     l = getset(repo, subset, x, order)
     if order == defineorder:
         l.reverse()
     return l
 
 
 @predicate(b'roots(set)', safe=True)
 def roots(repo, subset, x):
     """Changesets in set with no parent changeset in set."""
     s = getset(repo, fullreposet(repo), x)
     parents = repo.changelog.parentrevs
 
     def filter(r):
         try:
             for p in parents(r):
                 if 0 <= p and p in s:
                     return False
         except error.WdirUnsupported:
             for p in repo[None].parents():
                 if p.rev() in s:
                     return False
         return True
 
     return subset & s.filter(filter, condrepr=b'<roots>')
 
 
 MAXINT = (1 << 31) - 1
 MININT = -MAXINT - 1
 
 
 def pick_random(c, gen=random):
     # exists as its own function to make it possible to overwrite the seed
     return gen.randint(MININT, MAXINT)
 
 
 _sortkeyfuncs = {
     b'rev': scmutil.intrev,
     b'branch': lambda c: c.branch(),
     b'desc': lambda c: c.description(),
     b'user': lambda c: c.user(),
     b'author': lambda c: c.user(),
     b'date': lambda c: c.date()[0],
     b'node': scmutil.binnode,
     b'random': pick_random,
 }
 
 
 def _getsortargs(x):
     """Parse sort options into (set, [(key, reverse)], opts)"""
     args = getargsdict(
         x,
         b'sort',
         b'set keys topo.firstbranch random.seed',
     )
     if b'set' not in args:
         # i18n: "sort" is a keyword
         raise error.ParseError(_(b'sort requires one or two arguments'))
     keys = b"rev"
     if b'keys' in args:
         # i18n: "sort" is a keyword
         keys = getstring(args[b'keys'], _(b"sort spec must be a string"))
 
     keyflags = []
     for k in keys.split():
         fk = k
         reverse = k.startswith(b'-')
         if reverse:
             k = k[1:]
         if k not in _sortkeyfuncs and k != b'topo':
             raise error.ParseError(
                 _(b"unknown sort key %r") % pycompat.bytestr(fk)
             )
         keyflags.append((k, reverse))
 
     if len(keyflags) > 1 and any(k == b'topo' for k, reverse in keyflags):
         # i18n: "topo" is a keyword
         raise error.ParseError(
             _(b'topo sort order cannot be combined with other sort keys')
         )
 
     opts = {}
     if b'topo.firstbranch' in args:
         if any(k == b'topo' for k, reverse in keyflags):
             opts[b'topo.firstbranch'] = args[b'topo.firstbranch']
         else:
             # i18n: "topo" and "topo.firstbranch" are keywords
             raise error.ParseError(
                 _(
                     b'topo.firstbranch can only be used '
                     b'when using the topo sort key'
                 )
             )
 
     if b'random.seed' in args:
         if any(k == b'random' for k, reverse in keyflags):
             s = args[b'random.seed']
             seed = getstring(s, _(b"random.seed must be a string"))
             opts[b'random.seed'] = seed
         else:
             # i18n: "random" and "random.seed" are keywords
             raise error.ParseError(
                 _(
                     b'random.seed can only be used '
                     b'when using the random sort key'
                 )
             )
 
     return args[b'set'], keyflags, opts
 
 
 @predicate(
     b'sort(set[, [-]key... [, ...]])', safe=True, takeorder=True, weight=10
 )
 def sort(repo, subset, x, order):
     """Sort set by keys. The default sort order is ascending, specify a key
     as ``-key`` to sort in descending order.
 
     The keys can be:
 
     - ``rev`` for the revision number,
     - ``branch`` for the branch name,
     - ``desc`` for the commit message (description),
     - ``user`` for user name (``author`` can be used as an alias),
     - ``date`` for the commit date
     - ``topo`` for a reverse topographical sort
     - ``node`` the nodeid of the revision
     - ``random`` randomly shuffle revisions
 
     The ``topo`` sort order cannot be combined with other sort keys. This sort
     takes one optional argument, ``topo.firstbranch``, which takes a revset that
     specifies what topographical branches to prioritize in the sort.
 
     The ``random`` sort takes one optional ``random.seed`` argument to control
     the pseudo-randomness of the result.
     """
     s, keyflags, opts = _getsortargs(x)
     revs = getset(repo, subset, s, order)
 
     if not keyflags or order != defineorder:
         return revs
     if len(keyflags) == 1 and keyflags[0][0] == b"rev":
         revs.sort(reverse=keyflags[0][1])
         return revs
     elif keyflags[0][0] == b"topo":
         firstbranch = ()
         parentrevs = repo.changelog.parentrevs
         parentsfunc = parentrevs
         if wdirrev in revs:
 
             def parentsfunc(r):
                 try:
                     return parentrevs(r)
                 except error.WdirUnsupported:
                     return [p.rev() for p in repo[None].parents()]
 
         if b'topo.firstbranch' in opts:
             firstbranch = getset(repo, subset, opts[b'topo.firstbranch'])
         revs = baseset(
             dagop.toposort(revs, parentsfunc, firstbranch),
             istopo=True,
         )
         if keyflags[0][1]:
             revs.reverse()
         return revs
 
     # sort() is guaranteed to be stable
     ctxs = [repo[r] for r in revs]
     for k, reverse in reversed(keyflags):
         func = _sortkeyfuncs[k]
         if k == b'random' and b'random.seed' in opts:
             seed = opts[b'random.seed']
             r = random.Random(seed)
             func = functools.partial(func, gen=r)
         ctxs.sort(key=func, reverse=reverse)
     return baseset([c.rev() for c in ctxs])
 
 
 @predicate(b'subrepo([pattern])')
 def subrepo(repo, subset, x):
     """Changesets that add, modify or remove the given subrepo.  If no subrepo
     pattern is named, any subrepo changes are returned.
     """
     # i18n: "subrepo" is a keyword
     args = getargs(x, 0, 1, _(b'subrepo takes at most one argument'))
     pat = None
     if len(args) != 0:
         pat = getstring(args[0], _(b"subrepo requires a pattern"))
 
     m = matchmod.exact([b'.hgsubstate'])
 
     def submatches(names):
         k, p, m = stringutil.stringmatcher(pat)
         for name in names:
             if m(name):
                 yield name
 
     def matches(x):
         c = repo[x]
         s = repo.status(c.p1().node(), c.node(), match=m)
 
         if pat is None:
             return s.added or s.modified or s.removed
 
         if s.added:
             return any(submatches(c.substate.keys()))
 
         if s.modified:
             subs = set(c.p1().substate.keys())
             subs.update(c.substate.keys())
 
             for path in submatches(subs):
                 if c.p1().substate.get(path) != c.substate.get(path):
                     return True
 
         if s.removed:
             return any(submatches(c.p1().substate.keys()))
 
         return False
 
     return subset.filter(matches, condrepr=(b'<subrepo %r>', pat))
 
 
 def _mapbynodefunc(repo, s, f):
     """(repo, smartset, [node] -> [node]) -> smartset
 
     Helper method to map a smartset to another smartset given a function only
     talking about nodes. Handles converting between rev numbers and nodes, and
     filtering.
     """
     cl = repo.unfiltered().changelog
     torev = cl.index.get_rev
     tonode = cl.node
     result = {torev(n) for n in f(tonode(r) for r in s)}
     result.discard(None)
     return smartset.baseset(result - repo.changelog.filteredrevs)
 
 
 @predicate(b'successors(set)', safe=True)
 def successors(repo, subset, x):
     """All successors for set, including the given set themselves.
     (EXPERIMENTAL)"""
     s = getset(repo, fullreposet(repo), x)
     f = lambda nodes: obsutil.allsuccessors(repo.obsstore, nodes)
     d = _mapbynodefunc(repo, s, f)
     return subset & d
 
 
 def _substringmatcher(pattern, casesensitive=True):
     kind, pattern, matcher = stringutil.stringmatcher(
         pattern, casesensitive=casesensitive
     )
     if kind == b'literal':
         if not casesensitive:
             pattern = encoding.lower(pattern)
             matcher = lambda s: pattern in encoding.lower(s)
         else:
             matcher = lambda s: pattern in s
     return kind, pattern, matcher
 
 
 @predicate(b'tag([name])', safe=True)
 def tag(repo, subset, x):
     """The specified tag by name, or all tagged revisions if no name is given.
 
     Pattern matching is supported for `name`. See
     :hg:`help revisions.patterns`.
     """
     # i18n: "tag" is a keyword
     args = getargs(x, 0, 1, _(b"tag takes one or no arguments"))
     cl = repo.changelog
     if args:
         pattern = getstring(
             args[0],
             # i18n: "tag" is a keyword
             _(b'the argument to tag must be a string'),
         )
         kind, pattern, matcher = stringutil.stringmatcher(pattern)
         if kind == b'literal':
             # avoid resolving all tags
             tn = repo._tagscache.tags.get(pattern, None)
             if tn is None:
                 raise error.RepoLookupError(
                     _(b"tag '%s' does not exist") % pattern
                 )
             s = {repo[tn].rev()}
         else:
             s = {cl.rev(n) for t, n in repo.tagslist() if matcher(t)}
     else:
         s = {cl.rev(n) for t, n in repo.tagslist() if t != b'tip'}
     return subset & s
 
 
 @predicate(b'tagged', safe=True)
 def tagged(repo, subset, x):
     return tag(repo, subset, x)
 
 
 @predicate(b'orphan()', safe=True)
 def orphan(repo, subset, x):
     """Non-obsolete changesets with obsolete ancestors. (EXPERIMENTAL)"""
     # i18n: "orphan" is a keyword
     getargs(x, 0, 0, _(b"orphan takes no arguments"))
     orphan = obsmod.getrevs(repo, b'orphan')
     return subset & orphan
 
 
 @predicate(b'unstable()', safe=True)
 def unstable(repo, subset, x):
     """Changesets with instabilities. (EXPERIMENTAL)"""
     # i18n: "unstable" is a keyword
     getargs(x, 0, 0, b'unstable takes no arguments')
     _unstable = set()
     _unstable.update(obsmod.getrevs(repo, b'orphan'))
     _unstable.update(obsmod.getrevs(repo, b'phasedivergent'))
     _unstable.update(obsmod.getrevs(repo, b'contentdivergent'))
     return subset & baseset(_unstable)
 
 
 @predicate(b'user(string)', safe=True, weight=10)
 def user(repo, subset, x):
     """User name contains string. The match is case-insensitive.
 
     Pattern matching is supported for `string`. See
     :hg:`help revisions.patterns`.
     """
     return author(repo, subset, x)
 
 
 @predicate(b'wdir()', safe=True, weight=0)
 def wdir(repo, subset, x):
     """Working directory. (EXPERIMENTAL)"""
     # i18n: "wdir" is a keyword
     getargs(x, 0, 0, _(b"wdir takes no arguments"))
     if wdirrev in subset or isinstance(subset, fullreposet):
         return baseset([wdirrev])
     return baseset()
 
 
 def _orderedlist(repo, subset, x):
     s = getstring(x, b"internal error")
     if not s:
         return baseset()
     # remove duplicates here. it's difficult for caller to deduplicate sets
     # because different symbols can point to the same rev.
     cl = repo.changelog
     ls = []
     seen = set()
     for t in s.split(b'\0'):
         try:
             # fast path for integer revision
             r = int(t)
             if (b'%d' % r) != t or r not in cl:
                 raise ValueError
             revs = [r]
         except ValueError:
             revs = stringset(repo, subset, t, defineorder)
 
         for r in revs:
             if r in seen:
                 continue
             if (
                 r in subset
                 or r in _virtualrevs
                 and isinstance(subset, fullreposet)
             ):
                 ls.append(r)
             seen.add(r)
     return baseset(ls)
 
 
 # for internal use
 @predicate(b'_list', safe=True, takeorder=True)
 def _list(repo, subset, x, order):
     if order == followorder:
         # slow path to take the subset order
         return subset & _orderedlist(repo, fullreposet(repo), x)
     else:
         return _orderedlist(repo, subset, x)
 
 
 def _orderedintlist(repo, subset, x):
     s = getstring(x, b"internal error")
     if not s:
         return baseset()
     ls = [int(r) for r in s.split(b'\0')]
     s = subset
     return baseset([r for r in ls if r in s])
 
 
 # for internal use
 @predicate(b'_intlist', safe=True, takeorder=True, weight=0)
 def _intlist(repo, subset, x, order):
     if order == followorder:
         # slow path to take the subset order
         return subset & _orderedintlist(repo, fullreposet(repo), x)
     else:
         return _orderedintlist(repo, subset, x)
 
 
 def _orderedhexlist(repo, subset, x):
     s = getstring(x, b"internal error")
     if not s:
         return baseset()
     cl = repo.changelog
     ls = [cl.rev(bin(r)) for r in s.split(b'\0')]
     s = subset
     return baseset([r for r in ls if r in s])
 
 
 # for internal use
 @predicate(b'_hexlist', safe=True, takeorder=True)
 def _hexlist(repo, subset, x, order):
     if order == followorder:
         # slow path to take the subset order
         return subset & _orderedhexlist(repo, fullreposet(repo), x)
     else:
         return _orderedhexlist(repo, subset, x)
 
 
 methods = {
     b"range": rangeset,
     b"rangeall": rangeall,
     b"rangepre": rangepre,
     b"rangepost": rangepost,
     b"dagrange": dagrange,
     b"string": stringset,
     b"symbol": stringset,
     b"and": andset,
     b"andsmally": andsmallyset,
     b"or": orset,
     b"not": notset,
     b"difference": differenceset,
     b"relation": relationset,
     b"relsubscript": relsubscriptset,
     b"subscript": subscriptset,
     b"list": listset,
     b"keyvalue": keyvaluepair,
     b"func": func,
     b"ancestor": ancestorspec,
     b"parent": parentspec,
     b"parentpost": parentpost,
     b"smartset": rawsmartset,
 }
 
 relations = {
     b"g": generationsrel,
     b"generations": generationsrel,
 }
 
 subscriptrelations = {
     b"g": generationssubrel,
     b"generations": generationssubrel,
 }
 
 
 def lookupfn(repo):
     def fn(symbol):
         try:
             return scmutil.isrevsymbol(repo, symbol)
         except error.AmbiguousPrefixLookupError:
             raise error.InputError(
                 b'ambiguous revision identifier: %s' % symbol
             )
 
     return fn
 
 
 def match(ui, spec, lookup=None):
     """Create a matcher for a single revision spec"""
     return matchany(ui, [spec], lookup=lookup)
 
 
 def matchany(ui, specs, lookup=None, localalias=None):
     """Create a matcher that will include any revisions matching one of the
     given specs
 
     If lookup function is not None, the parser will first attempt to handle
     old-style ranges, which may contain operator characters.
 
     If localalias is not None, it is a dict {name: definitionstring}. It takes
     precedence over [revsetalias] config section.
     """
     if not specs:
 
         def mfunc(repo, subset=None):
             return baseset()
 
         return mfunc
     if not all(specs):
         raise error.ParseError(_(b"empty query"))
     if len(specs) == 1:
         tree = revsetlang.parse(specs[0], lookup)
     else:
         tree = (
             b'or',
             (b'list',) + tuple(revsetlang.parse(s, lookup) for s in specs),
         )
 
     aliases = []
     warn = None
     if ui:
         aliases.extend(ui.configitems(b'revsetalias'))
         warn = ui.warn
     if localalias:
         aliases.extend(localalias.items())
     if aliases:
         tree = revsetlang.expandaliases(tree, aliases, warn=warn)
     tree = revsetlang.foldconcat(tree)
     tree = revsetlang.analyze(tree)
     tree = revsetlang.optimize(tree)
     return makematcher(tree)
 
 
 def makematcher(tree):
     """Create a matcher from an evaluatable tree"""
 
     def mfunc(repo, subset=None, order=None):
         if order is None:
             if subset is None:
                 order = defineorder  # 'x'
             else:
                 order = followorder  # 'subset & x'
         if subset is None:
             subset = fullreposet(repo)
         return getset(repo, subset, tree, order)
 
     return mfunc
 
 
 def loadpredicate(ui, extname, registrarobj):
     """Load revset predicates from specified registrarobj"""
     for name, func in registrarobj._table.items():
         symbols[name] = func
         if func._safe:
             safesymbols.add(name)
 
 
 # load built-in predicates explicitly to setup safesymbols
 loadpredicate(None, None, predicate)
 
 # tell hggettext to extract docstrings from these functions:
 i18nfunctions = symbols.values()