class Bundler::CLI

def help(cli = nil)
  case cli
  when "gemfile" then command = "gemfile.5"
  when nil       then command = "bundle"
  else command = "bundle-#{cli}"
  end
  manpages = %w(
      bundle
      bundle-config
      bundle-exec
      bundle-install
      bundle-package
      bundle-update
      gemfile.5)
  if manpages.include?(command)
    root = File.expand_path("../man", __FILE__)
    if have_groff? && root !~ %r{^file:/.+!/META-INF/jruby.home/.+}
      groff   = "groff -Wall -mtty-char -mandoc -Tascii"
      pager   = ENV['MANPAGER'] || ENV['PAGER'] || 'less -R'
      Kernel.exec "#{groff} #{root}/#{command} | #{pager}"
    else
      puts File.read("#{root}/#{command}.txt")
    end
  else
    super
  end
end