class RSpec::Core::Parser

def self.parse!(args)
  new.parse!(args)
end

def parse!(args)
  if args.include?("--formatter")
    args[args.index("--formatter")] = "--format"
    RSpec.deprecate("the --formatter option", "-f or --format")
  end
  options = {}
  parser(options).parse!(args)
  options
end

def parser(options)
  OptionParser.new do |parser|
    parser.banner = "Usage: rspec [options] [files or directories]"
    parser.on('-b', '--backtrace', 'Enable full backtrace') do |o|
      options[:full_backtrace] = true
    end
    parser.on('-c', '--[no-]color', '--[no-]colour', 'Enable color in the output') do |o|
      options[:color_enabled] = o
    end
    parser.on('-d', '--debug', 'Enable debugging') do |o|
      options[:debug] = true
    end
    parser.on('-e', '--example PATTERN', "Run examples whose full descriptions match this pattern",
            "(PATTERN is compiled into a Ruby regular expression)") do |o|
      options[:full_description] = /#{o}/
    end
    parser.on('-f', '--format FORMATTER', 'Choose a formatter',
            '  [p]rogress (default - dots)',
            '  [d]ocumentation (group and example names)',
            '  [h]tml',
            '  [t]extmate',
            '  custom formatter class name') do |o|
      options[:formatter] = o
    end
    parser.on_tail('-h', '--help', "You're looking at it.") do
      puts parser
      exit
    end
    parser.on('-I DIRECTORY', 'specify $LOAD_PATH directory (may be used more than once)') do |dir|
      options[:libs] ||= []
      options[:libs] << dir
    end
    parser.on('-l', '--line_number LINE', 'Specify the line number of a single example to run') do |o|
      options[:line_number] = o
    end
    parser.on('-p', '--profile', 'Enable profiling of examples with output of the top 10 slowest examples') do |o|
      options[:profile_examples] = o
    end
    parser.on('-r', '--require PATH', 'Require a file') do |path|
      options[:requires] ||= []
      options[:requires] << path
    end
    parser.on('-v', '--version', 'Show version') do
      puts RSpec::Core::Version::STRING
      exit
    end
    parser.on('-X', '--drb', 'Run examples via DRb') do |o|
      options[:drb] = true
    end
    parser.on('--configure COMMAND', 'Generate configuration files') do |cmd|
      CommandLineConfiguration.new(cmd).run
      exit
    end
    parser.on('--drb-port [PORT]', 'Port to connect to on the DRb server') do |o|
      options[:drb_port] = o.to_i
    end
  end
end