puppetlabs/marionette-collective — pull request #90 by bobtfish (2013-06-19 01:58:12+00:00)
Title: Allow --dm flatfile --do - for stdin

This allows me to write something like the following:
nagsrv -s /var/cache/nagios3/status.dat --with-service 'XXXX' --list-hosts --critical | mco puppet runall 12 --dm flatfile --do -

which I think is pretty handy :)