def initialize
@commands = {}
register_command BuildCommand.new
register_command CertCommand.new
register_command CheckCommand.new
register_command CleanupCommand.new
register_command ContentsCommand.new
register_command DependencyCommand.new
register_command EnvironmentCommand.new
register_command HelpCommand.new
register_command InstallCommand.new
register_command ListCommand.new
register_command OutdatedCommand.new
register_command PristineCommand.new
register_command QueryCommand.new
register_command RDocCommand.new
register_command SearchCommand.new
register_command SourcesCommand.new
register_command SpecificationCommand.new
register_command UninstallCommand.new
register_command UnpackCommand.new
register_command UpdateCommand.new
end