From: Holden Glova <dsafari@...>
Date: 2002-03-19T19:40:41+09:00
Subject: Re: Help with getoptlong please TIA :-)

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On Tue, 19 Mar 2002 12:25, Ray.ravinray@hotmail.com wrote:
> I need help with getoptlong .  It does fine when I use an option but if I
> do not use an option it doesn't do anything.  Do I have to pass in an
> option with getoptlong? any help or link would be apprecited.  I am very
> new to ruby but this is frustrating me
>
> Thanks,
>
> Ray

I just played with getoptlong this weekend for the first time and here is 
what worked for me. Here is a snippet of something I am playing with, hope 
this helps somewhat...

OPTION_LIST = [
    ['--query',  '-q',   GetoptLong::REQUIRED_ARGUMENT],
    ['--show',   '-s',   GetoptLong::REQUIRED_ARGUMENT]  
  ]
  
  
  def usage(msg = nil)
    $stderr.puts(msg) if msg
    
    program_name = File.basename($0)
    
    $stderr.puts "
usage:

  #{program_name} [options] [package_name]

options:
  
  --query   query the RAA for a package. Accepts regular expressions and 
partial names.
  --show    show information about a package. The package must be the 
complete name of the
            the package as is in the RAA.
"    
    exit 1
  end
  
  
  def initialize
    @package_name = ''
  
    opt_parser = GetoptLong.new(*OPTION_LIST)
    opt_parser.quiet = true
    
    usage if ARGV.length == 0
    
    opt_parser.each do |opt, arg|
      case opt
      when '--query'
        package_name = arg
        @action = proc { query_raa(package_name) } 
        break
      when '--show'
        package_name = arg
        @action = proc { show_from_raa(package_name) }
        break
      else
        usage
      end
    end
   
  rescue GetoptLong::InvalidOption => error
    usage(error.message)
  rescue GetoptLong::MissingArgument => error
    usage(error.message)
  end

- -- 
Signed,
Holden Glova
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