class Bundler::CLI

def init
  opts = options.dup
  if File.exist?("Gemfile")
    Bundler.ui.error "Gemfile already exists at #{Dir.pwd}/Gemfile"
    exit 1
  end
  if opts[:gemspec]
    gemspec = File.expand_path(opts[:gemspec])
    unless File.exist?(gemspec)
      Bundler.ui.error "Gem specification #{gemspec} doesn't exist"
      exit 1
    end
    spec = Gem::Specification.load(gemspec)
    puts "Writing new Gemfile to #{Dir.pwd}/Gemfile"
    File.open('Gemfile', 'wb') do |file|
      file << "# Generated from #{gemspec}\n"
      file << spec.to_gemfile
    end
  else
    puts "Writing new Gemfile to #{Dir.pwd}/Gemfile"
    FileUtils.cp(File.expand_path('../templates/Gemfile', __FILE__), 'Gemfile')
  end
end