Really Cheap Command-Line Option Parsing in Ruby

Question

EDIT: Please, please, please read the two requirements listed at the bottom of this post before replying. People keep posting their new gems and li

Answer 1

This is very similar to the accepted answer, but using ARGV.delete_if which is what I use in my simple parser. The only real difference is that options with arguments must be together (e.g. -l=file).

def usage
  "usage: #{File.basename($0)}: [-l=] [-q] file ..."
end

$quiet = false
$logfile = nil

ARGV.delete_if do |cur|
  next false if cur[0] != '-'
  case cur
  when '-q'
    $quiet = true
  when /^-l=(.+)$/
    $logfile = $1
  else
    $stderr.puts "Unknown option: #{cur}"
    $stderr.puts usage
    exit 1
  end
end

puts "quiet: #{$quiet} logfile: #{$logfile.inspect} args: #{ARGV.inspect}"