Always try to open the repository if -R/--repository is specified. This makes 'hg -R something_unknown command' consistently fail for all commands, not only for those who need a repository.

#!/bin/sh

hg
hg -q
hg help
hg -q help
hg add -h
hg add --skjdfks
hg help diff
hg help status
hg -q help status
hg help foo
hg skjdfks

exit 0