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+;;; cil-mode.el --- major mode for selinux cil       -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2025  John Turner
+
+;; Author: John Turner <jturner.usa@gmail.com>
+;; Keywords: 
+
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Code:
+
+(require 'rx)
+
+(put 'block 'lisp-indent-function 4)
+
+(defvar cil-mode--font-lock-defaults
+  `((,(rx (group (or "in" "block" "macro")) eow)
+     0 font-lock-keyword-face)))
+
+(define-derived-mode cil-mode lisp-data-mode "cil"
+  (setq-local font-lock-defaults cil-mode--font-lock-defaults))
+
+(add-to-list 'auto-mode-alist '("\\.cil\\'" . cil-mode))
+
+(provide 'cil-mode)
+;;; cil-mode.el ends here