tests/notcapable

debugdirstate: deprecate --nodates in favor of --no-dates

We have supported 'no-' prefixes for boolean flag for a few years now,
so I was expecting it to be --no-dates.

I noticed that we have --nodates options for a few more commands
(e.g. `hg diff`), but I'll leave that for another day.

Differential Revision: https://phab.mercurial-scm.org/D4693

# Disable the $CAP wire protocol capability.

if test -z "$CAP"
then
    echo "CAP environment variable not set."
fi

cat > notcapable-$CAP.py << EOF
from mercurial import extensions, localrepo, repository
def extsetup():
    extensions.wrapfunction(repository.peer, 'capable', wrapcapable)
    extensions.wrapfunction(localrepo.localrepository, 'peer', wrappeer)
def wrapcapable(orig, self, name, *args, **kwargs):
    if name in '$CAP'.split(' '):
        return False
    return orig(self, name, *args, **kwargs)
def wrappeer(orig, self):
    # Since we're disabling some newer features, we need to make sure local
    # repos add in the legacy features again.
    return localrepo.locallegacypeer(self)
EOF

echo '[extensions]' >> $HGRCPATH
echo "notcapable-$CAP = `pwd`/notcapable-$CAP.py" >> $HGRCPATH