Abort if earlygetopt fails to detect an option. Otherwise it could happen that a command is used on the wrong repository, because abbreviations of --cwd or --repository were ignored.

#!/bin/sh

echo '[Section]' >> $HGRCPATH
echo 'KeY = Case Sensitive' >> $HGRCPATH
echo 'key = lower case' >> $HGRCPATH

hg showconfig Section