file_system.rb

require 'pathname'

module Muxie
  module FileSystem
    extend self

    def symlink_data_files
      p 'Saving configuration files to ' + ENV['HOME']
      symlink_files(get_conf_files)
    end

    private

    def symlink_files(data_folder)
      scan_data_folder(data_folder).each do |file|
        renamed_file_path = set_file_to_home_path(file)
        orig_file_path = file.to_s
        link_file(orig_file_path, renamed_file_path)
      end
    end

    def get_conf_files
      ::Pathname.new(File.expand_path(File.join("..", "..", "data"), __FILE__))
    end

    def scan_data_folder(data_folder)
      ::Pathname.glob(data_folder.to_s + "/*")
    end

    def set_file_to_home_path(file)
      ENV['HOME'] + '/' + '.' + file.basename.to_s.gsub(".example", ".foo")
    end

    def link_file(orig_file_path, renamed_file_path)
      ::FileUtils.ln_s orig_file_path, renamed_file_path, force: true
      p "Symlinked #{file.basename} to #{renamed_file_path}"
    end
  end
end

probably returning an empty array on line 23, will have to test it out.