From: Roger Nordqvist <g00nz@...>
Date: 2007-10-09T18:52:45+09:00
Subject: Re: optparse and required switches

This is what I came up with for required options. Is this the "ruby way" 
of doing it or?

require 'optparse'

options = {}

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

  o.on("-s", "--server s", "Get servername to connect to") do |s|
    options[:server] = s
  end

  o.on("-u", "--username u", "Get username to connect as") do |u|
    options[:username] = u
  end

  o.on("-p", "--password p", "Get password for user username") do |p|
    options[:password] = p
  end

  o.on("-f", "--filename f", "Remote path and filename to tail") do |f|
    options[:filename] = f
  end

  o.on("-F", "--follow", "Use -f/--follow with remote tail command") do 
|follow|
    options[:follow] = follow
  end
end.parse!

# Check to see if we got the required arguments needed?
required_opts = [:server, :username, :password, :filename]

required_opts.each do |opt|
  if options.has_key?(opt)
    next
  else
    puts "Required option --#{opt} missing."
  end
end
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