如何让Thor显示选项？

Question

这是我的Ruby代码:

require 'thor'
require 'thor/group'

module CLI

    class Greet < Thor
        desc 'hi', 'Say hi!'
        method_option :name, :type => :string, :description => 'Name to greet', :default => 'there'
        def hi
            puts "Hi, #{options[:name]}!"
        end

        desc 'bye', 'say bye!'
        def bye
            puts "Bye!"
        end
    end


    class Root < Thor
        register CLI::Greet, 'greet', 'greet [COMMAND]', 'Greet with a command'
    end
end


CLI::Root.start

这是输出:

C:\temp>ruby greet.rb help greet
Usage:
  greet.rb greet [COMMAND]

Greet with a command

如何让它看起来像这样？

C:\temp>ruby greet.rb help greet
Usage:
  greet.rb greet [COMMAND]
    --name Name to greet

Greet with a command

Answer 1

你有两件事在这里发生.首先,您已经为方法分配了--name,而不是整个CLI::Greet类.所以如果你使用命令:

ruby greet.rb greet help hi

你得到

Usage:
  greet.rb hi

Options:
  [--name=NAME]  
                 # Default: there

Say hi!

哪个,是的,是错的 - 它在帮助中没有子命令.Thor中有一个错误提交.但是,它正确显示方法选项.

然而,您正在寻找的是一种类方法.这是为整个CLI::Greet类定义的方法,而不仅仅是#hi方法.

你这样做是这样的:

require 'thor'
require 'thor/group'

module CLI

    class Greet < Thor
        desc 'hi', 'Say hi!'
        class_option :number, :type => :string, :description => 'Number to call', :default => '555-1212'
        method_option :name, :type => :string, :description => 'Name to greet', :default => 'there'
        def hi
            puts "Hi, #{options[:name]}! Call me at #{options[:number]}"
        end

        desc 'bye', 'say bye!'
        def bye
            puts "Bye! Call me at #{options[:number]}"
        end
    end

    class Root < Thor
        register CLI::Greet, 'greet', 'greet [COMMAND]', 'Greet with a command'        
        tasks["greet"].options = CLI::Greet.class_options
    end
end

CLI::Root.start

有了这个,ruby greet.rb help greet回报

Usage:
  greet.rb greet [COMMAND]

Options:
  [--number=NUMBER]  
                     # Default: 555-1212

Greet with a command

注意这里还需要一个黑客攻击:tasks["greet"].options = CLI::Greet.class_options线路输入CLI::Root.雷神也有一个错误.