hgext/narrow/narrowwirepeer.py

typing: add `from __future__ import annotations` to remaining source files

Most of these look newer than when the original imports referenced in the
previous commit were dropped, so these weren't covered by the backout.  These
were found with:

    hg files mercurial hgext hgext3rd -I '**.py' -X '**/thirdparty' \
        | xargs grep -L 'from __future__ import annotations'

All of the `__init__.py` files that finds are empty, so those were ignored and
the rest manually edited.

# narrowwirepeer.py - passes narrow spec with unbundle command
#
# Copyright 2017 Google, Inc.
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

from __future__ import annotations

from mercurial.i18n import _

from mercurial.utils import stringutil

from mercurial import (
    bundle2,
    error,
    exchange,
    extensions,
    hg,
    narrowspec,
    wireprototypes,
    wireprotov1peer,
    wireprotov1server,
)

from . import narrowbundle2


def uisetup():
    wireprotov1peer.wirepeer.narrow_widen = peernarrowwiden


def reposetup(repo):
    def wirereposetup(ui, peer):
        def wrapped(orig, cmd, *args, **kwargs):
            if cmd == b'unbundle':
                # TODO: don't blindly add include/exclude wireproto
                # arguments to unbundle.
                include, exclude = repo.narrowpats
                kwargs["includepats"] = b','.join(include)
                kwargs["excludepats"] = b','.join(exclude)
            return orig(cmd, *args, **kwargs)

        extensions.wrapfunction(peer, '_calltwowaystream', wrapped)

    hg.wirepeersetupfuncs.append(wirereposetup)


@wireprotov1server.wireprotocommand(
    b'narrow_widen',
    b'oldincludes oldexcludes'
    b' newincludes newexcludes'
    b' commonheads cgversion'
    b' known ellipses',
    permission=b'pull',
)
def narrow_widen(
    repo,
    proto,
    oldincludes,
    oldexcludes,
    newincludes,
    newexcludes,
    commonheads,
    cgversion,
    known,
    ellipses,
):
    """wireprotocol command to send data when a narrow clone is widen. We will
    be sending a changegroup here.

    The current set of arguments which are required:
    oldincludes: the old includes of the narrow copy
    oldexcludes: the old excludes of the narrow copy
    newincludes: the new includes of the narrow copy
    newexcludes: the new excludes of the narrow copy
    commonheads: list of heads which are common between the server and client
    cgversion(maybe): the changegroup version to produce
    known: list of nodes which are known on the client (used in ellipses cases)
    ellipses: whether to send ellipses data or not
    """

    preferuncompressed = False
    try:

        def splitpaths(data):
            # work around ''.split(',') => ['']
            return data.split(b',') if data else []

        oldincludes = set(splitpaths(oldincludes))
        newincludes = set(splitpaths(newincludes))
        oldexcludes = set(splitpaths(oldexcludes))
        newexcludes = set(splitpaths(newexcludes))

        # enforce narrow acl if set
        if repo.ui.has_section(exchange._NARROWACL_SECTION):
            kwargs = exchange.applynarrowacl(
                repo, {'includepats': newincludes, 'excludepats': newexcludes}
            )
            newincludes = kwargs['includepats']
            requiredexcludes = kwargs['excludepats'] - newexcludes
            if requiredexcludes:
                # XXX: The below code to get the username was copied from exchange.py,
                # where it is noted that this is technically a layering violation for
                # assuming the existence of HTTP. Using it anyway to make the error
                # message consistent with the error message for invalid includes.
                ui = repo.ui
                username = ui.shortuser(
                    ui.environ.get(b'REMOTE_USER') or ui.username()
                )
                raise error.Abort(
                    _(b"The following excludes cannot be removed for %s: %s")
                    % (username, stringutil.pprint(list(requiredexcludes)))
                )
            newexcludes = kwargs['excludepats']

        # validate the patterns
        narrowspec.validatepatterns(oldincludes)
        narrowspec.validatepatterns(newincludes)
        narrowspec.validatepatterns(oldexcludes)
        narrowspec.validatepatterns(newexcludes)

        common = wireprototypes.decodelist(commonheads)
        known = wireprototypes.decodelist(known)
        if ellipses == b'0':
            ellipses = False
        else:
            ellipses = bool(ellipses)
        cgversion = cgversion

        bundler = bundle2.bundle20(repo.ui)
        newmatch = narrowspec.match(
            repo.root, include=newincludes, exclude=newexcludes
        )
        oldmatch = narrowspec.match(
            repo.root, include=oldincludes, exclude=oldexcludes
        )
        if not ellipses:
            bundle2.widen_bundle(
                bundler,
                repo,
                oldmatch,
                newmatch,
                common,
                known,
                cgversion,
                ellipses,
            )
        else:
            narrowbundle2.generate_ellipses_bundle2_for_widening(
                bundler,
                repo,
                oldmatch,
                newmatch,
                cgversion,
                common,
                known,
            )
    except error.Abort as exc:
        bundler = bundle2.bundle20(repo.ui)
        manargs = [(b'message', exc.message)]
        advargs = []
        if exc.hint is not None:
            advargs.append((b'hint', exc.hint))
        bundler.addpart(bundle2.bundlepart(b'error:abort', manargs, advargs))
        preferuncompressed = True

    chunks = bundler.getchunks()
    return wireprototypes.streamres(
        gen=chunks, prefer_uncompressed=preferuncompressed
    )


def peernarrowwiden(remote, **kwargs):
    for ch in ('commonheads', 'known'):
        kwargs[ch] = wireprototypes.encodelist(kwargs[ch])

    for ch in ('oldincludes', 'newincludes', 'oldexcludes', 'newexcludes'):
        kwargs[ch] = b','.join(kwargs[ch])

    kwargs['ellipses'] = b'%i' % bool(kwargs['ellipses'])
    f = remote._callcompressable(b'narrow_widen', **kwargs)
    return bundle2.getunbundler(remote.ui, f)