#!/usr/bin/env ruby
#
# $Id$

require 'rubyloader'
require 'optparse'

def main
  all = false
  quiet = false
  parser = OptionParser.new
  parser.on('-a', '--all', 'print all candidates.') {
    all = true
  }
  parser.on('-q', '--quiet', 'suppress message.') {
    quiet = true
  }
  parser.on('--help', 'print this message and quit.') {
    puts parser.help
    exit 0
  }
  begin
    parser.parse!
    unless ARGV.size == 1
      $stderr.puts 'wrong number of arguments'
      exit 1
    end
  rescue OptionParser::ParseError => err
    $stderr.puts err.message
    $stderr.puts parser.help
    exit 1
  end

  case
  when quiet
    begin
      RubyLoader.find_feature(ARGV[0])
      exit 0
    rescue ArgumentError
      exit 1
    end
  when all
    RubyLoader.find_feature_all(ARGV[0]).each do |path|
      puts path
    end
  else
    puts RubyLoader.find_feature(ARGV[0])
  end
rescue ArgumentError => err
  $stderr.puts err.message
  exit 1
end

main