view tests/notcapable @ 46448:1a7d12c82057

diff: add experimental support for "merge diffs"

The way this works is it re-runs the merge and "stores" conflicts, and then
diffs against the conflicted result. In a normal merge, you should only see
diffs against conflicted regions or in cases where there was a semantic
conflict but not a textual one. This makes it easier to detect "evil merges"
that contain substantial new work embedded in the merge commit.

Differential Revision: https://phab.mercurial-scm.org/D8504

# Disable the $CAP wire protocol capability.

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

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