class Bundler::Runtime

def setup_manpath
  # Store original MANPATH for restoration later in with_clean_env()
  ENV['BUNDLE_ORIG_MANPATH'] = ENV['MANPATH']
  # Add man/ subdirectories from activated bundles to MANPATH for man(1)
  manuals = $LOAD_PATH.map do |path|
    man_subdir = path.sub(/lib$/, 'man')
    man_subdir unless Dir[man_subdir + '/man?/'].empty?
  end.compact
  unless manuals.empty?
    ENV['MANPATH'] = manuals.concat(
      ENV['MANPATH'].to_s.split(File::PATH_SEPARATOR)
    ).uniq.join(File::PATH_SEPARATOR)
  end
end