Run rspec on file in emacs (depends on rake.el and projectile)

rspec_file.el

(defun coder/rspec-file ()
  "Run rspec on the current file and set as the compile target,
   if we have zeus available than run it via zeus otherwise run it
   via bundle exec rspec"
  (interactive)
  (projectile-with-default-dir (projectile-project-root)
    (let ((command-prefix (rake--choose-command-prefix (projectile-project-root) (list :zeus "zeus test "
                                                                                       :bundler "bundle exec rspec "))))
      (compile (concat command-prefix (coder/project-relative-current-file-path))))))