Recent Emacs (23 and up?)  has this feature called .dir-locals.el.
See also: https://www.gnu.org/software/emacs/manual/html_node/emacs/Directory-Variables.html



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66583 b2dd03c8-39d4-4d8f-98ff-823fe69b080e