runCommand -package:wai-app-static -package:libmpd -package:structured-cli -package:xmonad-contrib -package:graphviz -package:shake-plus -package:io-streams -package:quickcheck-state-machine -package:pandoc-plot -package:github-release -package:cabal-install -package:process -package:hledger is:exact -package:mongoDB

Run a Command.
Either calls the given continuation, prints help text and calls exitSuccess, or prints an error and calls exitFailure. See runSubcommand for details on subcommand support.