module Rock::CLI

# File lib/rock/cli.rb, line 5
def self.choose_orocos_task_and_port(name_service: Orocos.name_service, task_name: nil, port_name: nil)
    prompt = TTY::Prompt.new

    if task_name
        begin
            selected_task = Orocos.get(task_name)
        rescue Orocos::NotFound
        end
        candidates = name_service.names.grep(/(^|\/)#{task_name}/)
        if candidates.empty?
            STDERR.puts "No task matches #{task_name}, and none start with #{task_name}"
            return
        end
        if candidates.size == 1
            task_name = candidates.first
        else
            task_name = prompt.select("Select a task", candidates)
        end
    end

    if !task_name
        tasks = name_service.names
        if tasks.empty?
            STDERR.puts "No tasks available"
            return
        end
        task_name = prompt.select("Select a task", tasks)
    end
    selected_task ||= Orocos.get(task_name)

    if !port_name
        ports = selected_task.each_port.
            find_all { |p| p.respond_to?(:reader) }
        ports = Hash[ports.map { |p| [p.name, p] }]
        prompt.select("Select a port", ports)
    else
        selected_task.port(port_name)
    end
end