comparison mercurial/merge.py @ 44856:b7808443ed6a

mergestate: split out merge state handling code from main merge module

There's already some pretty reasonable encapsulation here, but I want
to make the mergestate storage a property of the context so memctx
instances can do a reasonable thing. This is the first step in a
reshuffle to make that easier.

Differential Revision: https://phab.mercurial-scm.org/D8550

44855:1d2d353e5c4a

# GNU General Public License version 2 or any later version.

from __future__ import absolute_import

import errno
import shutil
import stat
import struct

from .i18n import _
from .node import (
    addednodeid,
    bin,
    hex,
    modifiednodeid,
    nullhex,
    nullid,
    nullrev,
)
from .pycompat import delattr
from .thirdparty import attr
from . import (
    copies,
    encoding,
    error,
    filemerge,
    match as matchmod,
    obsutil,
    pathutil,
    pycompat,
    scmutil,
    subrepoutil,
    util,
    worker,
)
from .utils import hashutil

_pack = struct.pack
_unpack = struct.unpack


def _droponode(data):
    # used for compatibility for v1
    bits = data.split(b'\0')
    bits = bits[:-2] + bits[-1:]
    return b'\0'.join(bits)


# Merge state record types. See ``mergestate`` docs for more.
RECORD_LOCAL = b'L'
RECORD_OTHER = b'O'
RECORD_MERGED = b'F'
RECORD_CHANGEDELETE_CONFLICT = b'C'
RECORD_MERGE_DRIVER_MERGE = b'D'
RECORD_PATH_CONFLICT = b'P'
RECORD_MERGE_DRIVER_STATE = b'm'
RECORD_FILE_VALUES = b'f'
RECORD_LABELS = b'l'
RECORD_OVERRIDE = b't'
RECORD_UNSUPPORTED_MANDATORY = b'X'
RECORD_UNSUPPORTED_ADVISORY = b'x'
RECORD_RESOLVED_OTHER = b'R'

MERGE_DRIVER_STATE_UNMARKED = b'u'
MERGE_DRIVER_STATE_MARKED = b'm'
MERGE_DRIVER_STATE_SUCCESS = b's'

MERGE_RECORD_UNRESOLVED = b'u'
MERGE_RECORD_RESOLVED = b'r'
MERGE_RECORD_UNRESOLVED_PATH = b'pu'
MERGE_RECORD_RESOLVED_PATH = b'pr'
MERGE_RECORD_DRIVER_RESOLVED = b'd'
# represents that the file was automatically merged in favor
# of other version. This info is used on commit.
MERGE_RECORD_MERGED_OTHER = b'o'

ACTION_FORGET = b'f'
ACTION_REMOVE = b'r'
ACTION_ADD = b'a'
ACTION_GET = b'g'
ACTION_PATH_CONFLICT = b'p'
ACTION_PATH_CONFLICT_RESOLVE = b'pr'
ACTION_ADD_MODIFIED = b'am'
ACTION_CREATED = b'c'
ACTION_DELETED_CHANGED = b'dc'
ACTION_CHANGED_DELETED = b'cd'
ACTION_MERGE = b'm'
ACTION_LOCAL_DIR_RENAME_GET = b'dg'
ACTION_DIR_RENAME_MOVE_LOCAL = b'dm'
ACTION_KEEP = b'k'
ACTION_EXEC = b'e'
ACTION_CREATED_MERGE = b'cm'
# GET the other/remote side and store this info in mergestate
ACTION_GET_OTHER_AND_STORE = b'gs'


class mergestate(object):
    '''track 3-way merge state of individual files

    The merge state is stored on disk when needed. Two files are used: one with
    an old format (version 1), and one with a new format (version 2). Version 2
    stores a superset of the data in version 1, including new kinds of records
    in the future. For more about the new format, see the documentation for
    `_readrecordsv2`.

    Each record can contain arbitrary content, and has an associated type. This
    `type` should be a letter. If `type` is uppercase, the record is mandatory:
    versions of Mercurial that don't support it should abort. If `type` is
    lowercase, the record can be safely ignored.

    Currently known records:

    L: the node of the "local" part of the merge (hexified version)
    O: the node of the "other" part of the merge (hexified version)
    F: a file to be merged entry
    C: a change/delete or delete/change conflict
    D: a file that the external merge driver will merge internally
       (experimental)
    P: a path conflict (file vs directory)
    m: the external merge driver defined for this merge plus its run state
       (experimental)
    f: a (filename, dictionary) tuple of optional values for a given file
    X: unsupported mandatory record type (used in tests)
    x: unsupported advisory record type (used in tests)
    l: the labels for the parts of the merge.

    Merge driver run states (experimental):
    u: driver-resolved files unmarked -- needs to be run next time we're about
       to resolve or commit
    m: driver-resolved files marked -- only needs to be run before commit
    s: success/skipped -- does not need to be run any more

    Merge record states (stored in self._state, indexed by filename):
    u: unresolved conflict
    r: resolved conflict
    pu: unresolved path conflict (file conflicts with directory)
    pr: resolved path conflict
    d: driver-resolved conflict

    The resolve command transitions between 'u' and 'r' for conflicts and
    'pu' and 'pr' for path conflicts.
    '''

    statepathv1 = b'merge/state'
    statepathv2 = b'merge/state2'

    @staticmethod
    def clean(repo, node=None, other=None, labels=None):
        """Initialize a brand new merge state, removing any existing state on
        disk."""
        ms = mergestate(repo)
        ms.reset(node, other, labels)
        return ms

    @staticmethod
    def read(repo):
        """Initialize the merge state, reading it from disk."""
        ms = mergestate(repo)
        ms._read()
        return ms

    def __init__(self, repo):
        """Initialize the merge state.

        Do not use this directly! Instead call read() or clean()."""
        self._repo = repo
        self._dirty = False
        self._labels = None

    def reset(self, node=None, other=None, labels=None):
        self._state = {}
        self._stateextras = {}
        self._local = None
        self._other = None
        self._labels = labels
        for var in ('localctx', 'otherctx'):
            if var in vars(self):
                delattr(self, var)
        if node:
            self._local = node
            self._other = other
        self._readmergedriver = None
        if self.mergedriver:
            self._mdstate = MERGE_DRIVER_STATE_SUCCESS
        else:
            self._mdstate = MERGE_DRIVER_STATE_UNMARKED
        shutil.rmtree(self._repo.vfs.join(b'merge'), True)
        self._results = {}
        self._dirty = False

    def _read(self):
        """Analyse each record content to restore a serialized state from disk

        This function process "record" entry produced by the de-serialization
        of on disk file.
        """
        self._state = {}
        self._stateextras = {}
        self._local = None
        self._other = None
        for var in ('localctx', 'otherctx'):
            if var in vars(self):
                delattr(self, var)
        self._readmergedriver = None
        self._mdstate = MERGE_DRIVER_STATE_SUCCESS
        unsupported = set()
        records = self._readrecords()
        for rtype, record in records:
            if rtype == RECORD_LOCAL:
                self._local = bin(record)
            elif rtype == RECORD_OTHER:
                self._other = bin(record)
            elif rtype == RECORD_MERGE_DRIVER_STATE:
                bits = record.split(b'\0', 1)
                mdstate = bits[1]
                if len(mdstate) != 1 or mdstate not in (
                    MERGE_DRIVER_STATE_UNMARKED,
                    MERGE_DRIVER_STATE_MARKED,
                    MERGE_DRIVER_STATE_SUCCESS,
                ):
                    # the merge driver should be idempotent, so just rerun it
                    mdstate = MERGE_DRIVER_STATE_UNMARKED

                self._readmergedriver = bits[0]
                self._mdstate = mdstate
            elif rtype in (
                RECORD_MERGED,
                RECORD_CHANGEDELETE_CONFLICT,
                RECORD_PATH_CONFLICT,
                RECORD_MERGE_DRIVER_MERGE,
                RECORD_RESOLVED_OTHER,
            ):
                bits = record.split(b'\0')
                self._state[bits[0]] = bits[1:]
            elif rtype == RECORD_FILE_VALUES:
                filename, rawextras = record.split(b'\0', 1)
                extraparts = rawextras.split(b'\0')
                extras = {}
                i = 0
                while i < len(extraparts):
                    extras[extraparts[i]] = extraparts[i + 1]
                    i += 2

                self._stateextras[filename] = extras
            elif rtype == RECORD_LABELS:
                labels = record.split(b'\0', 2)
                self._labels = [l for l in labels if len(l) > 0]
            elif not rtype.islower():
                unsupported.add(rtype)
        self._results = {}
        self._dirty = False

        if unsupported:
            raise error.UnsupportedMergeRecords(unsupported)

    def _readrecords(self):
        """Read merge state from disk and return a list of record (TYPE, data)

        We read data from both v1 and v2 files and decide which one to use.

        V1 has been used by version prior to 2.9.1 and contains less data than
        v2. We read both versions and check if no data in v2 contradicts
        v1. If there is not contradiction we can safely assume that both v1
        and v2 were written at the same time and use the extract data in v2. If
        there is contradiction we ignore v2 content as we assume an old version
        of Mercurial has overwritten the mergestate file and left an old v2
        file around.

        returns list of record [(TYPE, data), ...]"""
        v1records = self._readrecordsv1()
        v2records = self._readrecordsv2()
        if self._v1v2match(v1records, v2records):
            return v2records
        else:
            # v1 file is newer than v2 file, use it
            # we have to infer the "other" changeset of the merge
            # we cannot do better than that with v1 of the format
            mctx = self._repo[None].parents()[-1]
            v1records.append((RECORD_OTHER, mctx.hex()))
            # add place holder "other" file node information
            # nobody is using it yet so we do no need to fetch the data
            # if mctx was wrong `mctx[bits[-2]]` may fails.
            for idx, r in enumerate(v1records):
                if r[0] == RECORD_MERGED:
                    bits = r[1].split(b'\0')
                    bits.insert(-2, b'')
                    v1records[idx] = (r[0], b'\0'.join(bits))
            return v1records

    def _v1v2match(self, v1records, v2records):
        oldv2 = set()  # old format version of v2 record
        for rec in v2records:
            if rec[0] == RECORD_LOCAL:
                oldv2.add(rec)
            elif rec[0] == RECORD_MERGED:
                # drop the onode data (not contained in v1)
                oldv2.add((RECORD_MERGED, _droponode(rec[1])))
        for rec in v1records:
            if rec not in oldv2:
                return False
        else:
            return True

    def _readrecordsv1(self):
        """read on disk merge state for version 1 file

        returns list of record [(TYPE, data), ...]

        Note: the "F" data from this file are one entry short
              (no "other file node" entry)
        """
        records = []
        try:
            f = self._repo.vfs(self.statepathv1)
            for i, l in enumerate(f):
                if i == 0:
                    records.append((RECORD_LOCAL, l[:-1]))
                else:
                    records.append((RECORD_MERGED, l[:-1]))
            f.close()
        except IOError as err:
            if err.errno != errno.ENOENT:
                raise
        return records

    def _readrecordsv2(self):
        """read on disk merge state for version 2 file

        This format is a list of arbitrary records of the form:

          [type][length][content]

        `type` is a single character, `length` is a 4 byte integer, and
        `content` is an arbitrary byte sequence of length `length`.

        Mercurial versions prior to 3.7 have a bug where if there are
        unsupported mandatory merge records, attempting to clear out the merge
        state with hg update --clean or similar aborts. The 't' record type
        works around that by writing out what those versions treat as an
        advisory record, but later versions interpret as special: the first
        character is the 'real' record type and everything onwards is the data.

        Returns list of records [(TYPE, data), ...]."""
        records = []
        try:
            f = self._repo.vfs(self.statepathv2)
            data = f.read()
            off = 0
            end = len(data)
            while off < end:
                rtype = data[off : off + 1]
                off += 1
                length = _unpack(b'>I', data[off : (off + 4)])[0]
                off += 4
                record = data[off : (off + length)]
                off += length
                if rtype == RECORD_OVERRIDE:
                    rtype, record = record[0:1], record[1:]
                records.append((rtype, record))
            f.close()
        except IOError as err:
            if err.errno != errno.ENOENT:
                raise
        return records

    @util.propertycache
    def mergedriver(self):
        # protect against the following:
        # - A configures a malicious merge driver in their hgrc, then
        #   pauses the merge
        # - A edits their hgrc to remove references to the merge driver
        # - A gives a copy of their entire repo, including .hg, to B
        # - B inspects .hgrc and finds it to be clean
        # - B then continues the merge and the malicious merge driver
        #  gets invoked
        configmergedriver = self._repo.ui.config(
            b'experimental', b'mergedriver'
        )
        if (
            self._readmergedriver is not None
            and self._readmergedriver != configmergedriver
        ):
            raise error.ConfigError(
                _(b"merge driver changed since merge started"),
                hint=_(b"revert merge driver change or abort merge"),
            )

        return configmergedriver

    @util.propertycache
    def local(self):
        if self._local is None:
            msg = b"local accessed but self._local isn't set"
            raise error.ProgrammingError(msg)
        return self._local

    @util.propertycache
    def localctx(self):
        return self._repo[self.local]

    @util.propertycache
    def other(self):
        if self._other is None:
            msg = b"other accessed but self._other isn't set"
            raise error.ProgrammingError(msg)
        return self._other

    @util.propertycache
    def otherctx(self):
        return self._repo[self.other]

    def active(self):
        """Whether mergestate is active.

        Returns True if there appears to be mergestate. This is a rough proxy
        for "is a merge in progress."
        """
        return bool(self._local) or bool(self._state)

    def commit(self):
        """Write current state on disk (if necessary)"""
        if self._dirty:
            records = self._makerecords()
            self._writerecords(records)
            self._dirty = False

    def _makerecords(self):
        records = []
        records.append((RECORD_LOCAL, hex(self._local)))
        records.append((RECORD_OTHER, hex(self._other)))
        if self.mergedriver:
            records.append(
                (
                    RECORD_MERGE_DRIVER_STATE,
                    b'\0'.join([self.mergedriver, self._mdstate]),
                )
            )
        # Write out state items. In all cases, the value of the state map entry
        # is written as the contents of the record. The record type depends on
        # the type of state that is stored, and capital-letter records are used
        # to prevent older versions of Mercurial that do not support the feature
        # from loading them.
        for filename, v in pycompat.iteritems(self._state):
            if v[0] == MERGE_RECORD_DRIVER_RESOLVED:
                # Driver-resolved merge. These are stored in 'D' records.
                records.append(
                    (RECORD_MERGE_DRIVER_MERGE, b'\0'.join([filename] + v))
                )
            elif v[0] in (
                MERGE_RECORD_UNRESOLVED_PATH,
                MERGE_RECORD_RESOLVED_PATH,
            ):
                # Path conflicts. These are stored in 'P' records.  The current
                # resolution state ('pu' or 'pr') is stored within the record.
                records.append(
                    (RECORD_PATH_CONFLICT, b'\0'.join([filename] + v))
                )
            elif v[0] == MERGE_RECORD_MERGED_OTHER:
                records.append(
                    (RECORD_RESOLVED_OTHER, b'\0'.join([filename] + v))
                )
            elif v[1] == nullhex or v[6] == nullhex:
                # Change/Delete or Delete/Change conflicts. These are stored in
                # 'C' records. v[1] is the local file, and is nullhex when the
                # file is deleted locally ('dc'). v[6] is the remote file, and
                # is nullhex when the file is deleted remotely ('cd').
                records.append(
                    (RECORD_CHANGEDELETE_CONFLICT, b'\0'.join([filename] + v))
                )
            else:
                # Normal files.  These are stored in 'F' records.
                records.append((RECORD_MERGED, b'\0'.join([filename] + v)))
        for filename, extras in sorted(pycompat.iteritems(self._stateextras)):
            rawextras = b'\0'.join(
                b'%s\0%s' % (k, v) for k, v in pycompat.iteritems(extras)
            )
            records.append(
                (RECORD_FILE_VALUES, b'%s\0%s' % (filename, rawextras))
            )
        if self._labels is not None:
            labels = b'\0'.join(self._labels)
            records.append((RECORD_LABELS, labels))
        return records

    def _writerecords(self, records):
        """Write current state on disk (both v1 and v2)"""
        self._writerecordsv1(records)
        self._writerecordsv2(records)

    def _writerecordsv1(self, records):
        """Write current state on disk in a version 1 file"""
        f = self._repo.vfs(self.statepathv1, b'wb')
        irecords = iter(records)
        lrecords = next(irecords)
        assert lrecords[0] == RECORD_LOCAL
        f.write(hex(self._local) + b'\n')
        for rtype, data in irecords:
            if rtype == RECORD_MERGED:
                f.write(b'%s\n' % _droponode(data))
        f.close()

    def _writerecordsv2(self, records):
        """Write current state on disk in a version 2 file

        See the docstring for _readrecordsv2 for why we use 't'."""
        # these are the records that all version 2 clients can read
        allowlist = (RECORD_LOCAL, RECORD_OTHER, RECORD_MERGED)
        f = self._repo.vfs(self.statepathv2, b'wb')
        for key, data in records:
            assert len(key) == 1
            if key not in allowlist:
                key, data = RECORD_OVERRIDE, b'%s%s' % (key, data)
            format = b'>sI%is' % len(data)
            f.write(_pack(format, key, len(data), data))
        f.close()

    @staticmethod
    def getlocalkey(path):
        """hash the path of a local file context for storage in the .hg/merge
        directory."""

        return hex(hashutil.sha1(path).digest())

    def add(self, fcl, fco, fca, fd):
        """add a new (potentially?) conflicting file the merge state
        fcl: file context for local,
        fco: file context for remote,
        fca: file context for ancestors,
        fd:  file path of the resulting merge.

        note: also write the local version to the `.hg/merge` directory.
        """
        if fcl.isabsent():
            localkey = nullhex
        else:
            localkey = mergestate.getlocalkey(fcl.path())
            self._repo.vfs.write(b'merge/' + localkey, fcl.data())
        self._state[fd] = [
            MERGE_RECORD_UNRESOLVED,
            localkey,
            fcl.path(),
            fca.path(),
            hex(fca.filenode()),
            fco.path(),
            hex(fco.filenode()),
            fcl.flags(),
        ]
        self._stateextras[fd] = {b'ancestorlinknode': hex(fca.node())}
        self._dirty = True

    def addpath(self, path, frename, forigin):
        """add a new conflicting path to the merge state
        path:    the path that conflicts
        frename: the filename the conflicting file was renamed to
        forigin: origin of the file ('l' or 'r' for local/remote)
        """
        self._state[path] = [MERGE_RECORD_UNRESOLVED_PATH, frename, forigin]
        self._dirty = True

    def addmergedother(self, path):
        self._state[path] = [MERGE_RECORD_MERGED_OTHER, nullhex, nullhex]
        self._dirty = True

    def __contains__(self, dfile):
        return dfile in self._state

    def __getitem__(self, dfile):
        return self._state[dfile][0]

    def __iter__(self):
        return iter(sorted(self._state))

    def files(self):
        return self._state.keys()

    def mark(self, dfile, state):
        self._state[dfile][0] = state
        self._dirty = True

    def mdstate(self):
        return self._mdstate

    def unresolved(self):
        """Obtain the paths of unresolved files."""

        for f, entry in pycompat.iteritems(self._state):
            if entry[0] in (
                MERGE_RECORD_UNRESOLVED,
                MERGE_RECORD_UNRESOLVED_PATH,
            ):
                yield f

    def driverresolved(self):
        """Obtain the paths of driver-resolved files."""

        for f, entry in self._state.items():
            if entry[0] == MERGE_RECORD_DRIVER_RESOLVED:
                yield f

    def extras(self, filename):
        return self._stateextras.setdefault(filename, {})

    def _resolve(self, preresolve, dfile, wctx):
        """rerun merge process for file path `dfile`"""
        if self[dfile] in (MERGE_RECORD_RESOLVED, MERGE_RECORD_DRIVER_RESOLVED):
            return True, 0
        if self._state[dfile][0] == MERGE_RECORD_MERGED_OTHER:
            return True, 0
        stateentry = self._state[dfile]
        state, localkey, lfile, afile, anode, ofile, onode, flags = stateentry
        octx = self._repo[self._other]
        extras = self.extras(dfile)
        anccommitnode = extras.get(b'ancestorlinknode')
        if anccommitnode:
            actx = self._repo[anccommitnode]
        else:
            actx = None
        fcd = self._filectxorabsent(localkey, wctx, dfile)
        fco = self._filectxorabsent(onode, octx, ofile)
        # TODO: move this to filectxorabsent
        fca = self._repo.filectx(afile, fileid=anode, changectx=actx)
        # "premerge" x flags
        flo = fco.flags()
        fla = fca.flags()
        if b'x' in flags + flo + fla and b'l' not in flags + flo + fla:
            if fca.node() == nullid and flags != flo:
                if preresolve:
                    self._repo.ui.warn(
                        _(
                            b'warning: cannot merge flags for %s '
                            b'without common ancestor - keeping local flags\n'
                        )
                        % afile
                    )
            elif flags == fla:
                flags = flo
        if preresolve:
            # restore local
            if localkey != nullhex:
                f = self._repo.vfs(b'merge/' + localkey)
                wctx[dfile].write(f.read(), flags)
                f.close()
            else:
                wctx[dfile].remove(ignoremissing=True)
            complete, r, deleted = filemerge.premerge(
                self._repo,
                wctx,
                self._local,
                lfile,
                fcd,
                fco,
                fca,
                labels=self._labels,
            )
        else:
            complete, r, deleted = filemerge.filemerge(
                self._repo,
                wctx,
                self._local,
                lfile,
                fcd,
                fco,
                fca,
                labels=self._labels,
            )
        if r is None:
            # no real conflict
            del self._state[dfile]
            self._stateextras.pop(dfile, None)
            self._dirty = True
        elif not r:
            self.mark(dfile, MERGE_RECORD_RESOLVED)

        if complete:
            action = None
            if deleted:
                if fcd.isabsent():
                    # dc: local picked. Need to drop if present, which may
                    # happen on re-resolves.
                    action = ACTION_FORGET
                else:
                    # cd: remote picked (or otherwise deleted)
                    action = ACTION_REMOVE
            else:
                if fcd.isabsent():  # dc: remote picked
                    action = ACTION_GET
                elif fco.isabsent():  # cd: local picked
                    if dfile in self.localctx:
                        action = ACTION_ADD_MODIFIED
                    else:
                        action = ACTION_ADD
                # else: regular merges (no action necessary)
            self._results[dfile] = r, action

        return complete, r

    def _filectxorabsent(self, hexnode, ctx, f):
        if hexnode == nullhex:
            return filemerge.absentfilectx(ctx, f)
        else:
            return ctx[f]

    def preresolve(self, dfile, wctx):
        """run premerge process for dfile

        Returns whether the merge is complete, and the exit code."""
        return self._resolve(True, dfile, wctx)

    def resolve(self, dfile, wctx):
        """run merge process (assuming premerge was run) for dfile

        Returns the exit code of the merge."""
        return self._resolve(False, dfile, wctx)[1]

    def counts(self):
        """return counts for updated, merged and removed files in this
        session"""
        updated, merged, removed = 0, 0, 0
        for r, action in pycompat.itervalues(self._results):
            if r is None:
                updated += 1
            elif r == 0:
                if action == ACTION_REMOVE:
                    removed += 1
                else:
                    merged += 1
        return updated, merged, removed

    def unresolvedcount(self):
        """get unresolved count for this merge (persistent)"""
        return len(list(self.unresolved()))

    def actions(self):
        """return lists of actions to perform on the dirstate"""
        actions = {
            ACTION_REMOVE: [],
            ACTION_FORGET: [],
            ACTION_ADD: [],
            ACTION_ADD_MODIFIED: [],
            ACTION_GET: [],
        }
        for f, (r, action) in pycompat.iteritems(self._results):
            if action is not None:
                actions[action].append((f, None, b"merge result"))
        return actions

    def recordactions(self):
        """record remove/add/get actions in the dirstate"""
        branchmerge = self._repo.dirstate.p2() != nullid
        recordupdates(self._repo, self.actions(), branchmerge, None)

    def queueremove(self, f):
        """queues a file to be removed from the dirstate

        Meant for use by custom merge drivers."""
        self._results[f] = 0, ACTION_REMOVE

    def queueadd(self, f):
        """queues a file to be added to the dirstate

        Meant for use by custom merge drivers."""
        self._results[f] = 0, ACTION_ADD

    def queueget(self, f):
        """queues a file to be marked modified in the dirstate

        Meant for use by custom merge drivers."""
        self._results[f] = 0, ACTION_GET


def _getcheckunknownconfig(repo, section, name):
    config = repo.ui.config(section, name)
    valid = [b'abort', b'ignore', b'warn']

            elif config == b'warn':
                warnconflicts.update(conflicts)

        checkunknowndirs = _unknowndirschecker()
        for f, (m, args, msg) in pycompat.iteritems(actions):
            if m in (ACTION_CREATED, ACTION_DELETED_CHANGED):
                if _checkunknownfile(repo, wctx, mctx, f):
                    fileconflicts.add(f)
                elif pathconfig and f not in wctx:
                    path = checkunknowndirs(repo, wctx, f)
                    if path is not None:
                        pathconflicts.add(path)
            elif m == ACTION_LOCAL_DIR_RENAME_GET:
                if _checkunknownfile(repo, wctx, mctx, f, args[0]):
                    fileconflicts.add(f)

        allconflicts = fileconflicts | pathconflicts
        ignoredconflicts = {c for c in allconflicts if repo.dirstate._ignore(c)}
        unknownconflicts = allconflicts - ignoredconflicts
        collectconflicts(ignoredconflicts, ignoredconfig)
        collectconflicts(unknownconflicts, unknownconfig)
    else:
        for f, (m, args, msg) in pycompat.iteritems(actions):
            if m == ACTION_CREATED_MERGE:
                fl2, anc = args
                different = _checkunknownfile(repo, wctx, mctx, f)
                if repo.dirstate._ignore(f):
                    config = ignoredconfig
                else:

                # (1) this is probably the wrong behavior here -- we should
                #     probably abort, but some actions like rebases currently
                #     don't like an abort happening in the middle of
                #     merge.update.
                if not different:
                    actions[f] = (ACTION_GET, (fl2, False), b'remote created')
                elif mergeforce or config == b'abort':
                    actions[f] = (
                        ACTION_MERGE,
                        (f, f, None, False, anc),
                        b'remote differs from untracked local',
                    )
                elif config == b'abort':
                    abortconflicts.add(f)
                else:
                    if config == b'warn':
                        warnconflicts.add(f)
                    actions[f] = (ACTION_GET, (fl2, True), b'remote created')

    for f in sorted(abortconflicts):
        warn = repo.ui.warn
        if f in pathconflicts:
            if repo.wvfs.isfileorlink(f):

            repo.ui.warn(_(b"%s: replacing untracked file\n") % f)
        else:
            repo.ui.warn(_(b"%s: replacing untracked files in directory\n") % f)

    for f, (m, args, msg) in pycompat.iteritems(actions):
        if m == ACTION_CREATED:
            backup = (
                f in fileconflicts
                or f in pathconflicts
                or any(p in pathconflicts for p in pathutil.finddirs(f))
            )
            (flags,) = args
            actions[f] = (ACTION_GET, (flags, backup), msg)


def _forgetremoved(wctx, mctx, branchmerge):
    """
    Forget removed files

    that is not present in the working directory, we need to mark it
    as removed.
    """

    actions = {}
    m = ACTION_FORGET
    if branchmerge:
        m = ACTION_REMOVE
    for f in wctx.deleted():
        if f not in mctx:
            actions[f] = m, None, b"forget deleted"

    if not branchmerge:
        for f in wctx.removed():
            if f not in mctx:
                actions[f] = ACTION_FORGET, None, b"forget removed"

    return actions


def _checkcollision(repo, wmf, actions):

        pmmf = set(wmf)

    if actions:
        # KEEP and EXEC are no-op
        for m in (
            ACTION_ADD,
            ACTION_ADD_MODIFIED,
            ACTION_FORGET,
            ACTION_GET,
            ACTION_CHANGED_DELETED,
            ACTION_DELETED_CHANGED,
        ):
            for f, args, msg in actions[m]:
                pmmf.add(f)
        for f, args, msg in actions[ACTION_REMOVE]:
            pmmf.discard(f)
        for f, args, msg in actions[ACTION_DIR_RENAME_MOVE_LOCAL]:
            f2, flags = args
            pmmf.discard(f2)
            pmmf.add(f)
        for f, args, msg in actions[ACTION_LOCAL_DIR_RENAME_GET]:
            pmmf.add(f)
        for f, args, msg in actions[ACTION_MERGE]:
            f1, f2, fa, move, anc = args
            if move:
                pmmf.discard(f1)
            pmmf.add(f)

    # The set of files deleted by all the actions.
    deletedfiles = set()

    for f, (m, args, msg) in actions.items():
        if m in (
            ACTION_CREATED,
            ACTION_DELETED_CHANGED,
            ACTION_MERGE,
            ACTION_CREATED_MERGE,
        ):
            # This action may create a new local file.
            createdfiledirs.update(pathutil.finddirs(f))
            if mf.hasdir(f):
                # The file aliases a local directory.  This might be ok if all
                # the files in the local directory are being deleted.  This
                # will be checked once we know what all the deleted files are.
                remoteconflicts.add(f)
        # Track the names of all deleted files.
        if m == ACTION_REMOVE:
            deletedfiles.add(f)
        if m == ACTION_MERGE:
            f1, f2, fa, move, anc = args
            if move:
                deletedfiles.add(f1)
        if m == ACTION_DIR_RENAME_MOVE_LOCAL:
            f2, flags = args
            deletedfiles.add(f2)

    # Check all directories that contain created files for path conflicts.
    for p in createdfiledirs:

            else:
                # A file is in a directory which aliases a local file.
                # We will need to rename the local file.
                localconflicts.add(p)
        if p in actions and actions[p][0] in (
            ACTION_CREATED,
            ACTION_DELETED_CHANGED,
            ACTION_MERGE,
            ACTION_CREATED_MERGE,
        ):
            # The file is in a directory which aliases a remote file.
            # This is an internal inconsistency within the remote
            # manifest.
            invalidconflicts.add(p)

    for p in localconflicts:
        if p not in deletedfiles:
            ctxname = bytes(wctx).rstrip(b'+')
            pnew = util.safename(p, ctxname, wctx, set(actions.keys()))
            actions[pnew] = (
                ACTION_PATH_CONFLICT_RESOLVE,
                (p,),
                b'local path conflict',
            )
            actions[p] = (ACTION_PATH_CONFLICT, (pnew, b'l'), b'path conflict')

    if remoteconflicts:
        # Check if all files in the conflicting directories have been removed.
        ctxname = bytes(mctx).rstrip(b'+')
        for f, p in _filesindirs(repo, mf, remoteconflicts):
            if f not in deletedfiles:
                m, args, msg = actions[p]
                pnew = util.safename(p, ctxname, wctx, set(actions.keys()))
                if m in (ACTION_DELETED_CHANGED, ACTION_MERGE):
                    # Action was merge, just update target.
                    actions[pnew] = (m, args, msg)
                else:
                    # Action was create, change to renamed get action.
                    fl = args[0]
                    actions[pnew] = (
                        ACTION_LOCAL_DIR_RENAME_GET,
                        (p, fl),
                        b'remote path conflict',
                    )
                actions[p] = (
                    ACTION_PATH_CONFLICT,
                    (pnew, ACTION_REMOVE),
                    b'path conflict',
                )
                remoteconflicts.remove(p)
                break

                fa = branch_copies1.copy.get(
                    f, None
                ) or branch_copies2.copy.get(f, None)
                if fa is not None:
                    actions[f] = (
                        ACTION_MERGE,
                        (f, f, fa, False, pa.node()),
                        b'both renamed from %s' % fa,
                    )
                else:
                    actions[f] = (
                        ACTION_MERGE,
                        (f, f, None, False, pa.node()),
                        b'both created',
                    )
            else:
                a = ma[f]
                fla = ma.flags(f)
                nol = b'l' not in fl1 + fl2 + fla
                if n2 == a and fl2 == fla:
                    actions[f] = (ACTION_KEEP, (), b'remote unchanged')
                elif n1 == a and fl1 == fla:  # local unchanged - use remote
                    if n1 == n2:  # optimization: keep local content
                        actions[f] = (
                            ACTION_EXEC,
                            (fl2,),
                            b'update permissions',
                        )
                    else:
                        actions[f] = (
                            ACTION_GET_OTHER_AND_STORE
                            if branchmerge
                            else ACTION_GET,
                            (fl2, False),
                            b'remote is newer',
                        )
                elif nol and n2 == a:  # remote only changed 'x'
                    actions[f] = (ACTION_EXEC, (fl2,), b'update permissions')
                elif nol and n1 == a:  # local only changed 'x'
                    actions[f] = (
                        ACTION_GET_OTHER_AND_STORE
                        if branchmerge
                        else ACTION_GET,
                        (fl1, False),
                        b'remote is newer',
                    )
                else:  # both changed something
                    actions[f] = (
                        ACTION_MERGE,
                        (f, f, f, False, pa.node()),
                        b'versions differ',
                    )
        elif n1:  # file exists only on local side
            if f in copied2:

                f in branch_copies1.movewithdir
            ):  # directory rename, move local
                f2 = branch_copies1.movewithdir[f]
                if f2 in m2:
                    actions[f2] = (
                        ACTION_MERGE,
                        (f, f2, None, True, pa.node()),
                        b'remote directory rename, both created',
                    )
                else:
                    actions[f2] = (
                        ACTION_DIR_RENAME_MOVE_LOCAL,
                        (f, fl1),
                        b'remote directory rename - move from %s' % f,
                    )
            elif f in branch_copies1.copy:
                f2 = branch_copies1.copy[f]
                actions[f] = (
                    ACTION_MERGE,
                    (f, f2, f2, False, pa.node()),
                    b'local copied/moved from %s' % f2,
                )
            elif f in ma:  # clean, a different, no remote
                if n1 != ma[f]:
                    if acceptremote:
                        actions[f] = (ACTION_REMOVE, None, b'remote delete')
                    else:
                        actions[f] = (
                            ACTION_CHANGED_DELETED,
                            (f, None, f, False, pa.node()),
                            b'prompt changed/deleted',
                        )
                elif n1 == addednodeid:
                    # This extra 'a' is added by working copy manifest to mark
                    # the file as locally added. We should forget it instead of
                    # deleting it.
                    actions[f] = (ACTION_FORGET, None, b'remote deleted')
                else:
                    actions[f] = (ACTION_REMOVE, None, b'other deleted')
        elif n2:  # file exists only on remote side
            if f in copied1:
                pass  # we'll deal with it on m1 side
            elif f in branch_copies2.movewithdir:
                f2 = branch_copies2.movewithdir[f]
                if f2 in m1:
                    actions[f2] = (
                        ACTION_MERGE,
                        (f2, f, None, False, pa.node()),
                        b'local directory rename, both created',
                    )
                else:
                    actions[f2] = (
                        ACTION_LOCAL_DIR_RENAME_GET,
                        (f, fl2),
                        b'local directory rename - get from %s' % f,
                    )
            elif f in branch_copies2.copy:
                f2 = branch_copies2.copy[f]
                if f2 in m2:
                    actions[f] = (
                        ACTION_MERGE,
                        (f2, f, f2, False, pa.node()),
                        b'remote copied from %s' % f2,
                    )
                else:
                    actions[f] = (
                        ACTION_MERGE,
                        (f2, f, f2, True, pa.node()),
                        b'remote moved from %s' % f2,
                    )
            elif f not in ma:
                # local unknown, remote created: the logic is described by the

                #   y         y           y      |   merge
                #
                # Checking whether the files are different is expensive, so we
                # don't do that when we can avoid it.
                if not force:
                    actions[f] = (ACTION_CREATED, (fl2,), b'remote created')
                elif not branchmerge:
                    actions[f] = (ACTION_CREATED, (fl2,), b'remote created')
                else:
                    actions[f] = (
                        ACTION_CREATED_MERGE,
                        (fl2, pa.node()),
                        b'remote created, get or merge',
                    )
            elif n2 != ma[f]:
                df = None

                        # new file added in a directory that was moved
                        df = branch_copies1.dirmove[d] + f[len(d) :]
                        break
                if df is not None and df in m1:
                    actions[df] = (
                        ACTION_MERGE,
                        (df, f, f, False, pa.node()),
                        b'local directory rename - respect move '
                        b'from %s' % f,
                    )
                elif acceptremote:
                    actions[f] = (ACTION_CREATED, (fl2,), b'remote recreating')
                else:
                    actions[f] = (
                        ACTION_DELETED_CHANGED,
                        (None, f, f, False, pa.node()),
                        b'prompt deleted/changed',
                    )

    if repo.ui.configbool(b'experimental', b'merge.checkpathconflicts'):

       remained the same."""
    # We force a copy of actions.items() because we're going to mutate
    # actions as we resolve trivial conflicts.
    for f, (m, args, msg) in list(actions.items()):
        if (
            m == ACTION_CHANGED_DELETED
            and f in ancestor
            and not wctx[f].cmp(ancestor[f])
        ):
            # local did change but ended up with same content
            actions[f] = ACTION_REMOVE, None, b'prompt same'
        elif (
            m == ACTION_DELETED_CHANGED
            and f in ancestor
            and not mctx[f].cmp(ancestor[f])
        ):
            # remote did change but ended up with same content
            del actions[f]  # don't get = keep local deleted

            if renamedelete is None or len(renamedelete) < len(renamedelete1):
                renamedelete = renamedelete1

            for f, a in sorted(pycompat.iteritems(actions)):
                m, args, msg = a
                if m == ACTION_GET_OTHER_AND_STORE:
                    m = ACTION_GET
                repo.ui.debug(b' %s: %s -> %s\n' % (f, msg, m))
                if f in fbids:
                    d = fbids[f]
                    if m in d:
                        d[m].append(a)

                if all(a == l[0] for a in l[1:]):  # len(bids) is > 1
                    repo.ui.note(_(b" %s: consensus for %s\n") % (f, m))
                    actions[f] = l[0]
                    continue
            # If keep is an option, just do it.
            if ACTION_KEEP in bids:
                repo.ui.note(_(b" %s: picking 'keep' action\n") % f)
                actions[f] = bids[ACTION_KEEP][0]
                continue
            # If there are gets and they all agree [how could they not?], do it.
            if ACTION_GET in bids:
                ga0 = bids[ACTION_GET][0]
                if all(a == ga0 for a in bids[ACTION_GET][1:]):
                    repo.ui.note(_(b" %s: picking 'get' action\n") % f)
                    actions[f] = ga0
                    continue
            # TODO: Consider other simple actions such as mode changes
            # Handle inefficient democrazy.

    # don't touch the context to be merged in.  'cd' is skipped, because
    # changed/deleted never resolves to something from the remote side.
    oplist = [
        actions[a]
        for a in (
            ACTION_GET,
            ACTION_DELETED_CHANGED,
            ACTION_LOCAL_DIR_RENAME_GET,
            ACTION_MERGE,
        )
    ]
    prefetch = scmutil.prefetchfiles
    matchfiles = scmutil.matchfiles
    prefetch(

def emptyactions():
    """create an actions dict, to be populated and passed to applyupdates()"""
    return {
        m: []
        for m in (
            ACTION_ADD,
            ACTION_ADD_MODIFIED,
            ACTION_FORGET,
            ACTION_GET,
            ACTION_CHANGED_DELETED,
            ACTION_DELETED_CHANGED,
            ACTION_REMOVE,
            ACTION_DIR_RENAME_MOVE_LOCAL,
            ACTION_LOCAL_DIR_RENAME_GET,
            ACTION_MERGE,
            ACTION_EXEC,
            ACTION_KEEP,
            ACTION_PATH_CONFLICT,
            ACTION_PATH_CONFLICT_RESOLVE,
            ACTION_GET_OTHER_AND_STORE,
        )
    }


def applyupdates(

    """

    _prefetchfiles(repo, mctx, actions)

    updated, merged, removed = 0, 0, 0
    ms = mergestate.clean(repo, wctx.p1().node(), mctx.node(), labels)

    # add ACTION_GET_OTHER_AND_STORE to mergestate
    for e in actions[ACTION_GET_OTHER_AND_STORE]:
        ms.addmergedother(e[0])

    moves = []
    for m, l in actions.items():
        l.sort()

    # 'cd' and 'dc' actions are treated like other merge conflicts
    mergeactions = sorted(actions[ACTION_CHANGED_DELETED])
    mergeactions.extend(sorted(actions[ACTION_DELETED_CHANGED]))
    mergeactions.extend(actions[ACTION_MERGE])
    for f, args, msg in mergeactions:
        f1, f2, fa, move, anc = args
        if f == b'.hgsubstate':  # merged internally
            continue
        if f1 is None:

        if wctx[f].lexists():
            repo.ui.debug(b"removing %s\n" % f)
            wctx[f].audit()
            wctx[f].remove()

    numupdates = sum(len(l) for m, l in actions.items() if m != ACTION_KEEP)
    progress = repo.ui.makeprogress(
        _(b'updating'), unit=_(b'files'), total=numupdates
    )

    if [a for a in actions[ACTION_REMOVE] if a[0] == b'.hgsubstate']:
        subrepoutil.submerge(repo, wctx, mctx, wctx, overwrite, labels)

    # record path conflicts
    for f, args, msg in actions[ACTION_PATH_CONFLICT]:
        f1, fo = args
        s = repo.ui.status
        s(
            _(
                b"%s: path conflict - a file or link has the same name as a "

    # per-item cost at 0 in that case.
    cost = 0 if wctx.isinmemory() else 0.001

    # remove in parallel (must come before resolving path conflicts and getting)
    prog = worker.worker(
        repo.ui, cost, batchremove, (repo, wctx), actions[ACTION_REMOVE]
    )
    for i, item in prog:
        progress.increment(step=i, item=item)
    removed = len(actions[ACTION_REMOVE])

    # resolve path conflicts (must come before getting)
    for f, args, msg in actions[ACTION_PATH_CONFLICT_RESOLVE]:
        repo.ui.debug(b" %s: %s -> pr\n" % (f, msg))
        (f0,) = args
        if wctx[f0].lexists():
            repo.ui.note(_(b"moving %s to %s\n") % (f0, f))
            wctx[f].audit()

    prog = worker.worker(
        repo.ui,
        cost,
        batchget,
        (repo, mctx, wctx, wantfiledata),
        actions[ACTION_GET],
        threadsafe=threadsafe,
        hasretval=True,
    )
    getfiledata = {}
    for final, res in prog:
        if final:
            getfiledata = res
        else:
            i, item = res
            progress.increment(step=i, item=item)
    updated = len(actions[ACTION_GET])

    if [a for a in actions[ACTION_GET] if a[0] == b'.hgsubstate']:
        subrepoutil.submerge(repo, wctx, mctx, wctx, overwrite, labels)

    # forget (manifest only, just log it) (must come first)
    for f, args, msg in actions[ACTION_FORGET]:
        repo.ui.debug(b" %s: %s -> f\n" % (f, msg))
        progress.increment(item=f)

    # re-add (manifest only, just log it)
    for f, args, msg in actions[ACTION_ADD]:
        repo.ui.debug(b" %s: %s -> a\n" % (f, msg))
        progress.increment(item=f)

    # re-add/mark as modified (manifest only, just log it)
    for f, args, msg in actions[ACTION_ADD_MODIFIED]:
        repo.ui.debug(b" %s: %s -> am\n" % (f, msg))
        progress.increment(item=f)

    # keep (noop, just log it)
    for f, args, msg in actions[ACTION_KEEP]:
        repo.ui.debug(b" %s: %s -> k\n" % (f, msg))
        # no progress

    # directory rename, move local
    for f, args, msg in actions[ACTION_DIR_RENAME_MOVE_LOCAL]:
        repo.ui.debug(b" %s: %s -> dm\n" % (f, msg))
        progress.increment(item=f)
        f0, flags = args
        repo.ui.note(_(b"moving %s to %s\n") % (f0, f))
        wctx[f].audit()
        wctx[f].write(wctx.filectx(f0).data(), flags)
        wctx[f0].remove()
        updated += 1

    # local directory rename, get
    for f, args, msg in actions[ACTION_LOCAL_DIR_RENAME_GET]:
        repo.ui.debug(b" %s: %s -> dg\n" % (f, msg))
        progress.increment(item=f)
        f0, flags = args
        repo.ui.note(_(b"getting %s to %s\n") % (f0, f))
        wctx[f].write(mctx.filectx(f0).data(), flags)
        updated += 1

    # exec
    for f, args, msg in actions[ACTION_EXEC]:
        repo.ui.debug(b" %s: %s -> e\n" % (f, msg))
        progress.increment(item=f)
        (flags,) = args
        wctx[f].audit()
        wctx[f].setflags(b'l' in flags, b'x' in flags)

    unresolved = ms.unresolvedcount()

    if (
        usemergedriver
        and not unresolved
        and ms.mdstate() != MERGE_DRIVER_STATE_SUCCESS
    ):
        if not driverconclude(repo, ms, wctx, labels=labels):
            # XXX setting unresolved to at least 1 is a hack to make sure we
            # error out
            unresolved = max(unresolved, 1)

    merged += msmerged
    removed += msremoved

    extraactions = ms.actions()
    if extraactions:
        mfiles = {a[0] for a in actions[ACTION_MERGE]}
        for k, acts in pycompat.iteritems(extraactions):
            actions[k].extend(acts)
            if k == ACTION_GET and wantfiledata:
                # no filedata until mergestate is updated to provide it
                for a in acts:
                    getfiledata[a[0]] = None
            # Remove these files from actions[ACTION_MERGE] as well. This is
            # important because in recordupdates, files in actions[ACTION_MERGE]

            #
            # We don't need to do the same operation for 'dc' and 'cd' because
            # those lists aren't consulted again.
            mfiles.difference_update(a[0] for a in acts)

        actions[ACTION_MERGE] = [
            a for a in actions[ACTION_MERGE] if a[0] in mfiles
        ]

    progress.complete()
    assert len(getfiledata) == (len(actions[ACTION_GET]) if wantfiledata else 0)
    return updateresult(updated, merged, removed, unresolved), getfiledata


def recordupdates(repo, actions, branchmerge, getfiledata):
    """record merge actions to the dirstate"""
    # remove (must come first)
    for f, args, msg in actions.get(ACTION_REMOVE, []):
        if branchmerge:
            repo.dirstate.remove(f)
        else:
            repo.dirstate.drop(f)

    # forget (must come first)
    for f, args, msg in actions.get(ACTION_FORGET, []):
        repo.dirstate.drop(f)

    # resolve path conflicts
    for f, args, msg in actions.get(ACTION_PATH_CONFLICT_RESOLVE, []):
        (f0,) = args
        origf0 = repo.dirstate.copied(f0) or f0
        repo.dirstate.add(f)
        repo.dirstate.copy(origf0, f)
        if f0 == origf0:
            repo.dirstate.remove(f0)
        else:
            repo.dirstate.drop(f0)

    # re-add
    for f, args, msg in actions.get(ACTION_ADD, []):
        repo.dirstate.add(f)

    # re-add/mark as modified
    for f, args, msg in actions.get(ACTION_ADD_MODIFIED, []):
        if branchmerge:
            repo.dirstate.normallookup(f)
        else:
            repo.dirstate.add(f)

    # exec change
    for f, args, msg in actions.get(ACTION_EXEC, []):
        repo.dirstate.normallookup(f)

    # keep
    for f, args, msg in actions.get(ACTION_KEEP, []):
        pass

    # get
    for f, args, msg in actions.get(ACTION_GET, []):
        if branchmerge:
            repo.dirstate.otherparent(f)
        else:
            parentfiledata = getfiledata[f] if getfiledata else None
            repo.dirstate.normal(f, parentfiledata=parentfiledata)

    # merge
    for f, args, msg in actions.get(ACTION_MERGE, []):
        f1, f2, fa, move, anc = args
        if branchmerge:
            # We've done a branch merge, mark this file as merged
            # so that we properly record the merger later
            repo.dirstate.merge(f)
            if f1 != f2:  # copy/rename
                if move:
                    repo.dirstate.remove(f1)
                if f1 != f:
                    repo.dirstate.copy(f1, f)
                else:
                    repo.dirstate.copy(f2, f)
        else:
            # We've update-merged a locally modified file, so
            # we set the dirstate to emulate a normal checkout
            # of that file some time in the past. Thus our
            # merge will appear as a normal local file
            # modification.
            if f2 == f:  # file not locally copied/moved
                repo.dirstate.normallookup(f)
            if move:
                repo.dirstate.drop(f1)

    # directory rename, move local
    for f, args, msg in actions.get(ACTION_DIR_RENAME_MOVE_LOCAL, []):
        f0, flag = args
        if branchmerge:
            repo.dirstate.add(f)
            repo.dirstate.remove(f0)
            repo.dirstate.copy(f0, f)
        else:
            repo.dirstate.normal(f)
            repo.dirstate.drop(f0)

    # directory rename, get
    for f, args, msg in actions.get(ACTION_LOCAL_DIR_RENAME_GET, []):
        f0, flag = args
        if branchmerge:
            repo.dirstate.add(f)
            repo.dirstate.copy(f0, f)
        else:
            repo.dirstate.normal(f)


UPDATECHECK_ABORT = b'abort'  # handled at higher layers
UPDATECHECK_NONE = b'none'
UPDATECHECK_LINEAR = b'linear'

        overwrite = force and not branchmerge
        ### check phase
        if not overwrite:
            if len(pl) > 1:
                raise error.Abort(_(b"outstanding uncommitted merge"))
            ms = mergestate.read(repo)
            if list(ms.unresolved()):
                raise error.Abort(
                    _(b"outstanding merge conflicts"),
                    hint=_(b"use 'hg resolve' to resolve"),
                )

        )

        if updatecheck == UPDATECHECK_NO_CONFLICT:
            for f, (m, args, msg) in pycompat.iteritems(actionbyfile):
                if m not in (
                    ACTION_GET,
                    ACTION_KEEP,
                    ACTION_EXEC,
                    ACTION_REMOVE,
                    ACTION_PATH_CONFLICT_RESOLVE,
                    ACTION_GET_OTHER_AND_STORE,
                ):
                    msg = _(b"conflicting changes")
                    hint = _(b"commit or update --clean to discard changes")
                    raise error.Abort(msg, hint=hint)

        if b'.hgsubstate' in actionbyfile:
            f = b'.hgsubstate'
            m, args, msg = actionbyfile[f]
            prompts = filemerge.partextras(labels)
            prompts[b'f'] = f
            if m == ACTION_CHANGED_DELETED:
                if repo.ui.promptchoice(
                    _(
                        b"local%(l)s changed %(f)s which other%(o)s deleted\n"
                        b"use (c)hanged version or (d)elete?"
                        b"$$ &Changed $$ &Delete"
                    )
                    % prompts,
                    0,
                ):
                    actionbyfile[f] = (ACTION_REMOVE, None, b'prompt delete')
                elif f in p1:
                    actionbyfile[f] = (
                        ACTION_ADD_MODIFIED,
                        None,
                        b'prompt keep',
                    )
                else:
                    actionbyfile[f] = (ACTION_ADD, None, b'prompt keep')
            elif m == ACTION_DELETED_CHANGED:
                f1, f2, fa, move, anc = args
                flags = p2[f2].flags()
                if (
                    repo.ui.promptchoice(
                        _(

                        0,
                    )
                    == 0
                ):
                    actionbyfile[f] = (
                        ACTION_GET,
                        (flags, False),
                        b'prompt recreating',
                    )
                else:
                    del actionbyfile[f]

        for f, (m, args, msg) in pycompat.iteritems(actionbyfile):
            if m not in actions:
                actions[m] = []
            actions[m].append((f, args, msg))

        # ACTION_GET_OTHER_AND_STORE is a ACTION_GET + store in mergestate
        for e in actions[ACTION_GET_OTHER_AND_STORE]:
            actions[ACTION_GET].append(e)

        if not util.fscasesensitive(repo.path):
            # check collision between files only in p2 for clean update
            if not branchmerge and (
                force or not wc.dirty(missing=True, branch=False)

        if (
            fsmonitorwarning
            and not fsmonitorenabled
            and p1.node() == nullid
            and len(actions[ACTION_GET]) >= fsmonitorthreshold
            and pycompat.sysplatform.startswith((b'linux', b'darwin'))
        ):
            repo.ui.warn(
                _(
                    b'(warning: large working directory being used without '

        )

        if updatedirstate:
            with repo.dirstate.parentchange():
                repo.setparents(fp1, fp2)
                recordupdates(repo, actions, branchmerge, getfiledata)
                # update completed, clear state
                util.unlink(repo.vfs.join(b'updatestate'))

                if not branchmerge:
                    repo.dirstate.setbranch(p2.branch())

44856:b7808443ed6a

# GNU General Public License version 2 or any later version.

from __future__ import absolute_import

import errno
import stat
import struct

from .i18n import _
from .node import (
    addednodeid,
    modifiednodeid,
    nullid,
    nullrev,
)
from .thirdparty import attr
from . import (
    copies,
    encoding,
    error,
    filemerge,
    match as matchmod,
    mergestate as mergestatemod,
    obsutil,
    pathutil,
    pycompat,
    scmutil,
    subrepoutil,
    util,
    worker,
)

_pack = struct.pack
_unpack = struct.unpack


def _getcheckunknownconfig(repo, section, name):
    config = repo.ui.config(section, name)
    valid = [b'abort', b'ignore', b'warn']

            elif config == b'warn':
                warnconflicts.update(conflicts)

        checkunknowndirs = _unknowndirschecker()
        for f, (m, args, msg) in pycompat.iteritems(actions):
            if m in (
                mergestatemod.ACTION_CREATED,
                mergestatemod.ACTION_DELETED_CHANGED,
            ):
                if _checkunknownfile(repo, wctx, mctx, f):
                    fileconflicts.add(f)
                elif pathconfig and f not in wctx:
                    path = checkunknowndirs(repo, wctx, f)
                    if path is not None:
                        pathconflicts.add(path)
            elif m == mergestatemod.ACTION_LOCAL_DIR_RENAME_GET:
                if _checkunknownfile(repo, wctx, mctx, f, args[0]):
                    fileconflicts.add(f)

        allconflicts = fileconflicts | pathconflicts
        ignoredconflicts = {c for c in allconflicts if repo.dirstate._ignore(c)}
        unknownconflicts = allconflicts - ignoredconflicts
        collectconflicts(ignoredconflicts, ignoredconfig)
        collectconflicts(unknownconflicts, unknownconfig)
    else:
        for f, (m, args, msg) in pycompat.iteritems(actions):
            if m == mergestatemod.ACTION_CREATED_MERGE:
                fl2, anc = args
                different = _checkunknownfile(repo, wctx, mctx, f)
                if repo.dirstate._ignore(f):
                    config = ignoredconfig
                else:

                # (1) this is probably the wrong behavior here -- we should
                #     probably abort, but some actions like rebases currently
                #     don't like an abort happening in the middle of
                #     merge.update.
                if not different:
                    actions[f] = (
                        mergestatemod.ACTION_GET,
                        (fl2, False),
                        b'remote created',
                    )
                elif mergeforce or config == b'abort':
                    actions[f] = (
                        mergestatemod.ACTION_MERGE,
                        (f, f, None, False, anc),
                        b'remote differs from untracked local',
                    )
                elif config == b'abort':
                    abortconflicts.add(f)
                else:
                    if config == b'warn':
                        warnconflicts.add(f)
                    actions[f] = (
                        mergestatemod.ACTION_GET,
                        (fl2, True),
                        b'remote created',
                    )

    for f in sorted(abortconflicts):
        warn = repo.ui.warn
        if f in pathconflicts:
            if repo.wvfs.isfileorlink(f):

            repo.ui.warn(_(b"%s: replacing untracked file\n") % f)
        else:
            repo.ui.warn(_(b"%s: replacing untracked files in directory\n") % f)

    for f, (m, args, msg) in pycompat.iteritems(actions):
        if m == mergestatemod.ACTION_CREATED:
            backup = (
                f in fileconflicts
                or f in pathconflicts
                or any(p in pathconflicts for p in pathutil.finddirs(f))
            )
            (flags,) = args
            actions[f] = (mergestatemod.ACTION_GET, (flags, backup), msg)


def _forgetremoved(wctx, mctx, branchmerge):
    """
    Forget removed files

    that is not present in the working directory, we need to mark it
    as removed.
    """

    actions = {}
    m = mergestatemod.ACTION_FORGET
    if branchmerge:
        m = mergestatemod.ACTION_REMOVE
    for f in wctx.deleted():
        if f not in mctx:
            actions[f] = m, None, b"forget deleted"

    if not branchmerge:
        for f in wctx.removed():
            if f not in mctx:
                actions[f] = (
                    mergestatemod.ACTION_FORGET,
                    None,
                    b"forget removed",
                )

    return actions


def _checkcollision(repo, wmf, actions):

        pmmf = set(wmf)

    if actions:
        # KEEP and EXEC are no-op
        for m in (
            mergestatemod.ACTION_ADD,
            mergestatemod.ACTION_ADD_MODIFIED,
            mergestatemod.ACTION_FORGET,
            mergestatemod.ACTION_GET,
            mergestatemod.ACTION_CHANGED_DELETED,
            mergestatemod.ACTION_DELETED_CHANGED,
        ):
            for f, args, msg in actions[m]:
                pmmf.add(f)
        for f, args, msg in actions[mergestatemod.ACTION_REMOVE]:
            pmmf.discard(f)
        for f, args, msg in actions[mergestatemod.ACTION_DIR_RENAME_MOVE_LOCAL]:
            f2, flags = args
            pmmf.discard(f2)
            pmmf.add(f)
        for f, args, msg in actions[mergestatemod.ACTION_LOCAL_DIR_RENAME_GET]:
            pmmf.add(f)
        for f, args, msg in actions[mergestatemod.ACTION_MERGE]:
            f1, f2, fa, move, anc = args
            if move:
                pmmf.discard(f1)
            pmmf.add(f)

    # The set of files deleted by all the actions.
    deletedfiles = set()

    for f, (m, args, msg) in actions.items():
        if m in (
            mergestatemod.ACTION_CREATED,
            mergestatemod.ACTION_DELETED_CHANGED,
            mergestatemod.ACTION_MERGE,
            mergestatemod.ACTION_CREATED_MERGE,
        ):
            # This action may create a new local file.
            createdfiledirs.update(pathutil.finddirs(f))
            if mf.hasdir(f):
                # The file aliases a local directory.  This might be ok if all
                # the files in the local directory are being deleted.  This
                # will be checked once we know what all the deleted files are.
                remoteconflicts.add(f)
        # Track the names of all deleted files.
        if m == mergestatemod.ACTION_REMOVE:
            deletedfiles.add(f)
        if m == mergestatemod.ACTION_MERGE:
            f1, f2, fa, move, anc = args
            if move:
                deletedfiles.add(f1)
        if m == mergestatemod.ACTION_DIR_RENAME_MOVE_LOCAL:
            f2, flags = args
            deletedfiles.add(f2)

    # Check all directories that contain created files for path conflicts.
    for p in createdfiledirs:

            else:
                # A file is in a directory which aliases a local file.
                # We will need to rename the local file.
                localconflicts.add(p)
        if p in actions and actions[p][0] in (
            mergestatemod.ACTION_CREATED,
            mergestatemod.ACTION_DELETED_CHANGED,
            mergestatemod.ACTION_MERGE,
            mergestatemod.ACTION_CREATED_MERGE,
        ):
            # The file is in a directory which aliases a remote file.
            # This is an internal inconsistency within the remote
            # manifest.
            invalidconflicts.add(p)

    for p in localconflicts:
        if p not in deletedfiles:
            ctxname = bytes(wctx).rstrip(b'+')
            pnew = util.safename(p, ctxname, wctx, set(actions.keys()))
            actions[pnew] = (
                mergestatemod.ACTION_PATH_CONFLICT_RESOLVE,
                (p,),
                b'local path conflict',
            )
            actions[p] = (
                mergestatemod.ACTION_PATH_CONFLICT,
                (pnew, b'l'),
                b'path conflict',
            )

    if remoteconflicts:
        # Check if all files in the conflicting directories have been removed.
        ctxname = bytes(mctx).rstrip(b'+')
        for f, p in _filesindirs(repo, mf, remoteconflicts):
            if f not in deletedfiles:
                m, args, msg = actions[p]
                pnew = util.safename(p, ctxname, wctx, set(actions.keys()))
                if m in (
                    mergestatemod.ACTION_DELETED_CHANGED,
                    mergestatemod.ACTION_MERGE,
                ):
                    # Action was merge, just update target.
                    actions[pnew] = (m, args, msg)
                else:
                    # Action was create, change to renamed get action.
                    fl = args[0]
                    actions[pnew] = (
                        mergestatemod.ACTION_LOCAL_DIR_RENAME_GET,
                        (p, fl),
                        b'remote path conflict',
                    )
                actions[p] = (
                    mergestatemod.ACTION_PATH_CONFLICT,
                    (pnew, mergestatemod.ACTION_REMOVE),
                    b'path conflict',
                )
                remoteconflicts.remove(p)
                break

                fa = branch_copies1.copy.get(
                    f, None
                ) or branch_copies2.copy.get(f, None)
                if fa is not None:
                    actions[f] = (
                        mergestatemod.ACTION_MERGE,
                        (f, f, fa, False, pa.node()),
                        b'both renamed from %s' % fa,
                    )
                else:
                    actions[f] = (
                        mergestatemod.ACTION_MERGE,
                        (f, f, None, False, pa.node()),
                        b'both created',
                    )
            else:
                a = ma[f]
                fla = ma.flags(f)
                nol = b'l' not in fl1 + fl2 + fla
                if n2 == a and fl2 == fla:
                    actions[f] = (
                        mergestatemod.ACTION_KEEP,
                        (),
                        b'remote unchanged',
                    )
                elif n1 == a and fl1 == fla:  # local unchanged - use remote
                    if n1 == n2:  # optimization: keep local content
                        actions[f] = (
                            mergestatemod.ACTION_EXEC,
                            (fl2,),
                            b'update permissions',
                        )
                    else:
                        actions[f] = (
                            mergestatemod.ACTION_GET_OTHER_AND_STORE
                            if branchmerge
                            else mergestatemod.ACTION_GET,
                            (fl2, False),
                            b'remote is newer',
                        )
                elif nol and n2 == a:  # remote only changed 'x'
                    actions[f] = (
                        mergestatemod.ACTION_EXEC,
                        (fl2,),
                        b'update permissions',
                    )
                elif nol and n1 == a:  # local only changed 'x'
                    actions[f] = (
                        mergestatemod.ACTION_GET_OTHER_AND_STORE
                        if branchmerge
                        else mergestatemod.ACTION_GET,
                        (fl1, False),
                        b'remote is newer',
                    )
                else:  # both changed something
                    actions[f] = (
                        mergestatemod.ACTION_MERGE,
                        (f, f, f, False, pa.node()),
                        b'versions differ',
                    )
        elif n1:  # file exists only on local side
            if f in copied2:

                f in branch_copies1.movewithdir
            ):  # directory rename, move local
                f2 = branch_copies1.movewithdir[f]
                if f2 in m2:
                    actions[f2] = (
                        mergestatemod.ACTION_MERGE,
                        (f, f2, None, True, pa.node()),
                        b'remote directory rename, both created',
                    )
                else:
                    actions[f2] = (
                        mergestatemod.ACTION_DIR_RENAME_MOVE_LOCAL,
                        (f, fl1),
                        b'remote directory rename - move from %s' % f,
                    )
            elif f in branch_copies1.copy:
                f2 = branch_copies1.copy[f]
                actions[f] = (
                    mergestatemod.ACTION_MERGE,
                    (f, f2, f2, False, pa.node()),
                    b'local copied/moved from %s' % f2,
                )
            elif f in ma:  # clean, a different, no remote
                if n1 != ma[f]:
                    if acceptremote:
                        actions[f] = (
                            mergestatemod.ACTION_REMOVE,
                            None,
                            b'remote delete',
                        )
                    else:
                        actions[f] = (
                            mergestatemod.ACTION_CHANGED_DELETED,
                            (f, None, f, False, pa.node()),
                            b'prompt changed/deleted',
                        )
                elif n1 == addednodeid:
                    # This extra 'a' is added by working copy manifest to mark
                    # the file as locally added. We should forget it instead of
                    # deleting it.
                    actions[f] = (
                        mergestatemod.ACTION_FORGET,
                        None,
                        b'remote deleted',
                    )
                else:
                    actions[f] = (
                        mergestatemod.ACTION_REMOVE,
                        None,
                        b'other deleted',
                    )
        elif n2:  # file exists only on remote side
            if f in copied1:
                pass  # we'll deal with it on m1 side
            elif f in branch_copies2.movewithdir:
                f2 = branch_copies2.movewithdir[f]
                if f2 in m1:
                    actions[f2] = (
                        mergestatemod.ACTION_MERGE,
                        (f2, f, None, False, pa.node()),
                        b'local directory rename, both created',
                    )
                else:
                    actions[f2] = (
                        mergestatemod.ACTION_LOCAL_DIR_RENAME_GET,
                        (f, fl2),
                        b'local directory rename - get from %s' % f,
                    )
            elif f in branch_copies2.copy:
                f2 = branch_copies2.copy[f]
                if f2 in m2:
                    actions[f] = (
                        mergestatemod.ACTION_MERGE,
                        (f2, f, f2, False, pa.node()),
                        b'remote copied from %s' % f2,
                    )
                else:
                    actions[f] = (
                        mergestatemod.ACTION_MERGE,
                        (f2, f, f2, True, pa.node()),
                        b'remote moved from %s' % f2,
                    )
            elif f not in ma:
                # local unknown, remote created: the logic is described by the

                #   y         y           y      |   merge
                #
                # Checking whether the files are different is expensive, so we
                # don't do that when we can avoid it.
                if not force:
                    actions[f] = (
                        mergestatemod.ACTION_CREATED,
                        (fl2,),
                        b'remote created',
                    )
                elif not branchmerge:
                    actions[f] = (
                        mergestatemod.ACTION_CREATED,
                        (fl2,),
                        b'remote created',
                    )
                else:
                    actions[f] = (
                        mergestatemod.ACTION_CREATED_MERGE,
                        (fl2, pa.node()),
                        b'remote created, get or merge',
                    )
            elif n2 != ma[f]:
                df = None

                        # new file added in a directory that was moved
                        df = branch_copies1.dirmove[d] + f[len(d) :]
                        break
                if df is not None and df in m1:
                    actions[df] = (
                        mergestatemod.ACTION_MERGE,
                        (df, f, f, False, pa.node()),
                        b'local directory rename - respect move '
                        b'from %s' % f,
                    )
                elif acceptremote:
                    actions[f] = (
                        mergestatemod.ACTION_CREATED,
                        (fl2,),
                        b'remote recreating',
                    )
                else:
                    actions[f] = (
                        mergestatemod.ACTION_DELETED_CHANGED,
                        (None, f, f, False, pa.node()),
                        b'prompt deleted/changed',
                    )

    if repo.ui.configbool(b'experimental', b'merge.checkpathconflicts'):

       remained the same."""
    # We force a copy of actions.items() because we're going to mutate
    # actions as we resolve trivial conflicts.
    for f, (m, args, msg) in list(actions.items()):
        if (
            m == mergestatemod.ACTION_CHANGED_DELETED
            and f in ancestor
            and not wctx[f].cmp(ancestor[f])
        ):
            # local did change but ended up with same content
            actions[f] = mergestatemod.ACTION_REMOVE, None, b'prompt same'
        elif (
            m == mergestatemod.ACTION_DELETED_CHANGED
            and f in ancestor
            and not mctx[f].cmp(ancestor[f])
        ):
            # remote did change but ended up with same content
            del actions[f]  # don't get = keep local deleted

            if renamedelete is None or len(renamedelete) < len(renamedelete1):
                renamedelete = renamedelete1

            for f, a in sorted(pycompat.iteritems(actions)):
                m, args, msg = a
                if m == mergestatemod.ACTION_GET_OTHER_AND_STORE:
                    m = mergestatemod.ACTION_GET
                repo.ui.debug(b' %s: %s -> %s\n' % (f, msg, m))
                if f in fbids:
                    d = fbids[f]
                    if m in d:
                        d[m].append(a)

                if all(a == l[0] for a in l[1:]):  # len(bids) is > 1
                    repo.ui.note(_(b" %s: consensus for %s\n") % (f, m))
                    actions[f] = l[0]
                    continue
            # If keep is an option, just do it.
            if mergestatemod.ACTION_KEEP in bids:
                repo.ui.note(_(b" %s: picking 'keep' action\n") % f)
                actions[f] = bids[mergestatemod.ACTION_KEEP][0]
                continue
            # If there are gets and they all agree [how could they not?], do it.
            if mergestatemod.ACTION_GET in bids:
                ga0 = bids[mergestatemod.ACTION_GET][0]
                if all(a == ga0 for a in bids[mergestatemod.ACTION_GET][1:]):
                    repo.ui.note(_(b" %s: picking 'get' action\n") % f)
                    actions[f] = ga0
                    continue
            # TODO: Consider other simple actions such as mode changes
            # Handle inefficient democrazy.

    # don't touch the context to be merged in.  'cd' is skipped, because
    # changed/deleted never resolves to something from the remote side.
    oplist = [
        actions[a]
        for a in (
            mergestatemod.ACTION_GET,
            mergestatemod.ACTION_DELETED_CHANGED,
            mergestatemod.ACTION_LOCAL_DIR_RENAME_GET,
            mergestatemod.ACTION_MERGE,
        )
    ]
    prefetch = scmutil.prefetchfiles
    matchfiles = scmutil.matchfiles
    prefetch(

def emptyactions():
    """create an actions dict, to be populated and passed to applyupdates()"""
    return {
        m: []
        for m in (
            mergestatemod.ACTION_ADD,
            mergestatemod.ACTION_ADD_MODIFIED,
            mergestatemod.ACTION_FORGET,
            mergestatemod.ACTION_GET,
            mergestatemod.ACTION_CHANGED_DELETED,
            mergestatemod.ACTION_DELETED_CHANGED,
            mergestatemod.ACTION_REMOVE,
            mergestatemod.ACTION_DIR_RENAME_MOVE_LOCAL,
            mergestatemod.ACTION_LOCAL_DIR_RENAME_GET,
            mergestatemod.ACTION_MERGE,
            mergestatemod.ACTION_EXEC,
            mergestatemod.ACTION_KEEP,
            mergestatemod.ACTION_PATH_CONFLICT,
            mergestatemod.ACTION_PATH_CONFLICT_RESOLVE,
            mergestatemod.ACTION_GET_OTHER_AND_STORE,
        )
    }


def applyupdates(

    """

    _prefetchfiles(repo, mctx, actions)

    updated, merged, removed = 0, 0, 0
    ms = mergestatemod.mergestate.clean(
        repo, wctx.p1().node(), mctx.node(), labels
    )

    # add ACTION_GET_OTHER_AND_STORE to mergestate
    for e in actions[mergestatemod.ACTION_GET_OTHER_AND_STORE]:
        ms.addmergedother(e[0])

    moves = []
    for m, l in actions.items():
        l.sort()

    # 'cd' and 'dc' actions are treated like other merge conflicts
    mergeactions = sorted(actions[mergestatemod.ACTION_CHANGED_DELETED])
    mergeactions.extend(sorted(actions[mergestatemod.ACTION_DELETED_CHANGED]))
    mergeactions.extend(actions[mergestatemod.ACTION_MERGE])
    for f, args, msg in mergeactions:
        f1, f2, fa, move, anc = args
        if f == b'.hgsubstate':  # merged internally
            continue
        if f1 is None:

        if wctx[f].lexists():
            repo.ui.debug(b"removing %s\n" % f)
            wctx[f].audit()
            wctx[f].remove()

    numupdates = sum(
        len(l) for m, l in actions.items() if m != mergestatemod.ACTION_KEEP
    )
    progress = repo.ui.makeprogress(
        _(b'updating'), unit=_(b'files'), total=numupdates
    )

    if [
        a
        for a in actions[mergestatemod.ACTION_REMOVE]
        if a[0] == b'.hgsubstate'
    ]:
        subrepoutil.submerge(repo, wctx, mctx, wctx, overwrite, labels)

    # record path conflicts
    for f, args, msg in actions[mergestatemod.ACTION_PATH_CONFLICT]:
        f1, fo = args
        s = repo.ui.status
        s(
            _(
                b"%s: path conflict - a file or link has the same name as a "

    # per-item cost at 0 in that case.
    cost = 0 if wctx.isinmemory() else 0.001

    # remove in parallel (must come before resolving path conflicts and getting)
    prog = worker.worker(
        repo.ui,
        cost,
        batchremove,
        (repo, wctx),
        actions[mergestatemod.ACTION_REMOVE],
    )
    for i, item in prog:
        progress.increment(step=i, item=item)
    removed = len(actions[mergestatemod.ACTION_REMOVE])

    # resolve path conflicts (must come before getting)
    for f, args, msg in actions[mergestatemod.ACTION_PATH_CONFLICT_RESOLVE]:
        repo.ui.debug(b" %s: %s -> pr\n" % (f, msg))
        (f0,) = args
        if wctx[f0].lexists():
            repo.ui.note(_(b"moving %s to %s\n") % (f0, f))
            wctx[f].audit()

    prog = worker.worker(
        repo.ui,
        cost,
        batchget,
        (repo, mctx, wctx, wantfiledata),
        actions[mergestatemod.ACTION_GET],
        threadsafe=threadsafe,
        hasretval=True,
    )
    getfiledata = {}
    for final, res in prog:
        if final:
            getfiledata = res
        else:
            i, item = res
            progress.increment(step=i, item=item)
    updated = len(actions[mergestatemod.ACTION_GET])

    if [a for a in actions[mergestatemod.ACTION_GET] if a[0] == b'.hgsubstate']:
        subrepoutil.submerge(repo, wctx, mctx, wctx, overwrite, labels)

    # forget (manifest only, just log it) (must come first)
    for f, args, msg in actions[mergestatemod.ACTION_FORGET]:
        repo.ui.debug(b" %s: %s -> f\n" % (f, msg))
        progress.increment(item=f)

    # re-add (manifest only, just log it)
    for f, args, msg in actions[mergestatemod.ACTION_ADD]:
        repo.ui.debug(b" %s: %s -> a\n" % (f, msg))
        progress.increment(item=f)

    # re-add/mark as modified (manifest only, just log it)
    for f, args, msg in actions[mergestatemod.ACTION_ADD_MODIFIED]:
        repo.ui.debug(b" %s: %s -> am\n" % (f, msg))
        progress.increment(item=f)

    # keep (noop, just log it)
    for f, args, msg in actions[mergestatemod.ACTION_KEEP]:
        repo.ui.debug(b" %s: %s -> k\n" % (f, msg))
        # no progress

    # directory rename, move local
    for f, args, msg in actions[mergestatemod.ACTION_DIR_RENAME_MOVE_LOCAL]:
        repo.ui.debug(b" %s: %s -> dm\n" % (f, msg))
        progress.increment(item=f)
        f0, flags = args
        repo.ui.note(_(b"moving %s to %s\n") % (f0, f))
        wctx[f].audit()
        wctx[f].write(wctx.filectx(f0).data(), flags)
        wctx[f0].remove()
        updated += 1

    # local directory rename, get
    for f, args, msg in actions[mergestatemod.ACTION_LOCAL_DIR_RENAME_GET]:
        repo.ui.debug(b" %s: %s -> dg\n" % (f, msg))
        progress.increment(item=f)
        f0, flags = args
        repo.ui.note(_(b"getting %s to %s\n") % (f0, f))
        wctx[f].write(mctx.filectx(f0).data(), flags)
        updated += 1

    # exec
    for f, args, msg in actions[mergestatemod.ACTION_EXEC]:
        repo.ui.debug(b" %s: %s -> e\n" % (f, msg))
        progress.increment(item=f)
        (flags,) = args
        wctx[f].audit()
        wctx[f].setflags(b'l' in flags, b'x' in flags)

    unresolved = ms.unresolvedcount()

    if (
        usemergedriver
        and not unresolved
        and ms.mdstate() != mergestatemod.MERGE_DRIVER_STATE_SUCCESS
    ):
        if not driverconclude(repo, ms, wctx, labels=labels):
            # XXX setting unresolved to at least 1 is a hack to make sure we
            # error out
            unresolved = max(unresolved, 1)

    merged += msmerged
    removed += msremoved

    extraactions = ms.actions()
    if extraactions:
        mfiles = {a[0] for a in actions[mergestatemod.ACTION_MERGE]}
        for k, acts in pycompat.iteritems(extraactions):
            actions[k].extend(acts)
            if k == mergestatemod.ACTION_GET and wantfiledata:
                # no filedata until mergestate is updated to provide it
                for a in acts:
                    getfiledata[a[0]] = None
            # Remove these files from actions[ACTION_MERGE] as well. This is
            # important because in recordupdates, files in actions[ACTION_MERGE]

            #
            # We don't need to do the same operation for 'dc' and 'cd' because
            # those lists aren't consulted again.
            mfiles.difference_update(a[0] for a in acts)

        actions[mergestatemod.ACTION_MERGE] = [
            a for a in actions[mergestatemod.ACTION_MERGE] if a[0] in mfiles
        ]

    progress.complete()
    assert len(getfiledata) == (
        len(actions[mergestatemod.ACTION_GET]) if wantfiledata else 0
    )
    return updateresult(updated, merged, removed, unresolved), getfiledata


UPDATECHECK_ABORT = b'abort'  # handled at higher layers
UPDATECHECK_NONE = b'none'
UPDATECHECK_LINEAR = b'linear'

        overwrite = force and not branchmerge
        ### check phase
        if not overwrite:
            if len(pl) > 1:
                raise error.Abort(_(b"outstanding uncommitted merge"))
            ms = mergestatemod.mergestate.read(repo)
            if list(ms.unresolved()):
                raise error.Abort(
                    _(b"outstanding merge conflicts"),
                    hint=_(b"use 'hg resolve' to resolve"),
                )

        )

        if updatecheck == UPDATECHECK_NO_CONFLICT:
            for f, (m, args, msg) in pycompat.iteritems(actionbyfile):
                if m not in (
                    mergestatemod.ACTION_GET,
                    mergestatemod.ACTION_KEEP,
                    mergestatemod.ACTION_EXEC,
                    mergestatemod.ACTION_REMOVE,
                    mergestatemod.ACTION_PATH_CONFLICT_RESOLVE,
                    mergestatemod.ACTION_GET_OTHER_AND_STORE,
                ):
                    msg = _(b"conflicting changes")
                    hint = _(b"commit or update --clean to discard changes")
                    raise error.Abort(msg, hint=hint)

        if b'.hgsubstate' in actionbyfile:
            f = b'.hgsubstate'
            m, args, msg = actionbyfile[f]
            prompts = filemerge.partextras(labels)
            prompts[b'f'] = f
            if m == mergestatemod.ACTION_CHANGED_DELETED:
                if repo.ui.promptchoice(
                    _(
                        b"local%(l)s changed %(f)s which other%(o)s deleted\n"
                        b"use (c)hanged version or (d)elete?"
                        b"$$ &Changed $$ &Delete"
                    )
                    % prompts,
                    0,
                ):
                    actionbyfile[f] = (
                        mergestatemod.ACTION_REMOVE,
                        None,
                        b'prompt delete',
                    )
                elif f in p1:
                    actionbyfile[f] = (
                        mergestatemod.ACTION_ADD_MODIFIED,
                        None,
                        b'prompt keep',
                    )
                else:
                    actionbyfile[f] = (
                        mergestatemod.ACTION_ADD,
                        None,
                        b'prompt keep',
                    )
            elif m == mergestatemod.ACTION_DELETED_CHANGED:
                f1, f2, fa, move, anc = args
                flags = p2[f2].flags()
                if (
                    repo.ui.promptchoice(
                        _(

                        0,
                    )
                    == 0
                ):
                    actionbyfile[f] = (
                        mergestatemod.ACTION_GET,
                        (flags, False),
                        b'prompt recreating',
                    )
                else:
                    del actionbyfile[f]

        for f, (m, args, msg) in pycompat.iteritems(actionbyfile):
            if m not in actions:
                actions[m] = []
            actions[m].append((f, args, msg))

        # ACTION_GET_OTHER_AND_STORE is a mergestatemod.ACTION_GET + store in mergestate
        for e in actions[mergestatemod.ACTION_GET_OTHER_AND_STORE]:
            actions[mergestatemod.ACTION_GET].append(e)

        if not util.fscasesensitive(repo.path):
            # check collision between files only in p2 for clean update
            if not branchmerge and (
                force or not wc.dirty(missing=True, branch=False)

        if (
            fsmonitorwarning
            and not fsmonitorenabled
            and p1.node() == nullid
            and len(actions[mergestatemod.ACTION_GET]) >= fsmonitorthreshold
            and pycompat.sysplatform.startswith((b'linux', b'darwin'))
        ):
            repo.ui.warn(
                _(
                    b'(warning: large working directory being used without '

        )

        if updatedirstate:
            with repo.dirstate.parentchange():
                repo.setparents(fp1, fp2)
                mergestatemod.recordupdates(
                    repo, actions, branchmerge, getfiledata
                )
                # update completed, clear state
                util.unlink(repo.vfs.join(b'updatestate'))

                if not branchmerge:
                    repo.dirstate.setbranch(p2.branch())