def initialize
@commands = {}
register_command :build
register_command :cert
register_command :check
register_command :cleanup
register_command :contents
register_command :dependency
register_command :environment
register_command :fetch
register_command :generate_index
register_command :help
register_command :install
register_command :list
register_command :lock
register_command :mirror
register_command :outdated
register_command :pristine
register_command :query
register_command :rdoc
register_command :search
register_command :server
register_command :sources
register_command :specification
register_command :stale
register_command :uninstall
register_command :unpack
register_command :update
register_command :which
end