tests/notcapable

test-walk: add more tests for -I/-X

We had very limited testing of -I and -X, especially when combined
with plain file patterns and with each other. This adds some more
protection against regressions as upcoming patches modify the matcher
code. (Originally meant for my own upcoming patches, but now I know
drgott will be sending some patches soon.)

The only noteworthy cases seems to be that both of

  hg debugwalk -Xbeans/black beans/black
  hg debugwalk -Xbeans beans/black

walk the file. I would personally have expected the -X to trump. I
don't care enough to change it, but I also think it's fair if some
future commit changes the behavior.

# Disable the $CAP wire protocol capability.

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

cat > notcapable-$CAP.py << EOF
from mercurial import extensions, peer, localrepo
def extsetup():
    extensions.wrapfunction(peer.peerrepository, 'capable', wrapcapable)
    extensions.wrapfunction(localrepo.localrepository, 'peer', wrappeer)
def wrapcapable(orig, self, name, *args, **kwargs):
    if name in '$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