class Redcarpet::CLI

def self.options_parser
  @@options = {
    render_extensions: {},
    parse_extensions: {},
    smarty_pants: false
  }
  OptionParser.new do |opts|
    opts.banner = "Usage: redcarpet [--parse <extension>...] " \
                  "[--render <extension>...] [--smarty] <file>..."
    opts.on("--parse EXTENSION", "Enable a parsing extension") do |ext|
      ext = ext.gsub('-', '_').to_sym
      @@options[:parse_extensions][ext] = true
    end
    opts.on("--render EXTENSION", "Enable a rendering extension") do |ext|
      ext = ext.gsub('-', '_').to_sym
      @@options[:render_extensions][ext] = true
    end
    opts.on("--smarty", "Enable Smarty Pants") do
      @@options[:smarty_pants] = true
    end
    opts.on_tail("-v", "--version", "Display the current version") do
      STDOUT.puts "Redcarpet #{Redcarpet::VERSION}"
      exit
    end
    opts.on_tail("-h", "--help", "Display this help message") do
      puts opts
      exit
    end
  end
end