# File lib/chef/mixin/path_sanity.rb, line 23
      def enforce_path_sanity(env=ENV)
        if Chef::Config[:enforce_path_sanity]
          path_separator = Chef::Platform.windows? ? ';' : ':'
          existing_paths = env["PATH"].split(path_separator)
          # ensure the Ruby and Gem bindirs are included
          # mainly for 'full-stack' Chef installs
          paths_to_add = []
          paths_to_add << ruby_bindir unless sane_paths.include?(ruby_bindir)
          paths_to_add << gem_bindir unless sane_paths.include?(gem_bindir)
          paths_to_add << sane_paths if sane_paths
          paths_to_add.flatten!.compact!
          paths_to_add.each do |sane_path|
            unless existing_paths.include?(sane_path)
              env_path = env["PATH"].dup
              env_path << path_separator unless env["PATH"].empty?
              env_path << sane_path
              env["PATH"] = env_path
            end
          end
        end
      end