gentoo/app-emacs/dockerfile-mode/files/50dockerfile-mode-gentoo.el

(add-to-list 'load-path "@SITELISP@")
(autoload 'dockerfile-mode "dockerfile-mode"
  "A major mode to edit Dockerfiles." t)
(add-to-list 'auto-mode-alist
             (cons (concat "[/\\]"
                           "\\(?:Containerfile\\|Dockerfile\\)"
                           "\\(?:\\.[^/\\]*\\)?\\'")
                   'dockerfile-mode))
(add-to-list 'auto-mode-alist '("\\.dockerfile\\'" . dockerfile-mode))