ruby 选项解析器 : hiding help text for a command option

Question

Ruby “OptionParser 将根据此描述自动为您生成帮助屏幕”[http://ruby.about.com/od/advancedruby/a/optionparser.htm]

有没有办法删除命令选项的帮助文本。我可以使用隐藏命令，但有一个命令选项(开关)并隐藏其帮助上下文。

Answer 1

我能够为此拼凑出一个不太优雅的解决方案。它将隐藏主帮助屏幕中的选项，听起来它可能符合您的需要:

require 'optparse'

options = {}

OptionParser.new do |opts|
  opts.banner = "Usage: #{$0} [options]"

  opts.on("-a", "--argument 1,2,3", Array, "Array of arguments") { |a| options[:array] = a  }
  opts.on("-v", "--verbose", "Verbose output") { |v| options[:verbose] = true }
  opts.on("-h", "--help", "Display this help") do
    hidden_switch = "--argument"
    #Typecast opts to a string, split into an array of lines, delete the line 
    #if it contains the argument, and then rejoins them into a string
    puts opts.to_s.split("\n").delete_if { |line| line =~ /#{hidden_switch}/ }.join("\n") 
    exit
  end
end

如果您要运行 --help，您会看到以下输出:

Usage: test.rb [options]
    -v, --verbose                    Verbose output
    -h, --help                       Display this help