1;;; ninja-mode.el --- Major mode for editing .ninja files -*- lexical-binding: t -*- 2 3;; Package-Requires: ((emacs "24")) 4 5;; Copyright 2011 Google Inc. All Rights Reserved. 6;; 7;; Licensed under the Apache License, Version 2.0 (the "License"); 8;; you may not use this file except in compliance with the License. 9;; You may obtain a copy of the License at 10;; 11;; http://www.apache.org/licenses/LICENSE-2.0 12;; 13;; Unless required by applicable law or agreed to in writing, software 14;; distributed under the License is distributed on an "AS IS" BASIS, 15;; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 16;; See the License for the specific language governing permissions and 17;; limitations under the License. 18 19;;; Commentary: 20 21;; Simple emacs mode for editing .ninja files. 22;; Just some syntax highlighting for now. 23 24;;; Code: 25 26(defvar ninja-keywords 27 `((,(concat "^" (regexp-opt '("rule" "build" "subninja" "include" 28 "pool" "default") 29 'words)) 30 . font-lock-keyword-face) 31 ("\\([[:alnum:]_]+\\) =" 1 font-lock-variable-name-face) 32 ;; Variable expansion. 33 ("$[[:alnum:]_]+" . font-lock-variable-name-face) 34 ("${[[:alnum:]._]+}" . font-lock-variable-name-face) 35 ;; Rule names 36 ("rule +\\([[:alnum:]_.-]+\\)" 1 font-lock-function-name-face) 37 ;; Build Statement - highlight the rule used, 38 ;; allow for escaped $,: in outputs. 39 ("build +\\(?:[^:$\n]\\|$[:$]\\)+ *: *\\([[:alnum:]_.-]+\\)" 40 1 font-lock-function-name-face))) 41 42(defvar ninja-mode-syntax-table 43 (let ((table (make-syntax-table))) 44 (modify-syntax-entry ?\" "." table) 45 table) 46 "Syntax table used in `ninja-mode'.") 47 48(defun ninja-syntax-propertize (start end) 49 (save-match-data 50 (goto-char start) 51 (while (search-forward "#" end t) 52 (let ((match-pos (match-beginning 0))) 53 (when (and 54 ;; Is it the first non-white character on the line? 55 (eq match-pos (save-excursion (back-to-indentation) (point))) 56 (save-excursion 57 (goto-char (line-end-position 0)) 58 (or 59 ;; If we're continuing the previous line, it's not a 60 ;; comment. 61 (not (eq ?$ (char-before))) 62 ;; Except if the previous line is a comment as well, as the 63 ;; continuation dollar is ignored then. 64 (nth 4 (syntax-ppss))))) 65 (put-text-property match-pos (1+ match-pos) 'syntax-table '(11)) 66 (let ((line-end (line-end-position))) 67 ;; Avoid putting properties past the end of the buffer. 68 ;; Otherwise we get an `args-out-of-range' error. 69 (unless (= line-end (1+ (buffer-size))) 70 (put-text-property line-end (1+ line-end) 'syntax-table '(12))))))))) 71 72;;;###autoload 73(define-derived-mode ninja-mode prog-mode "ninja" 74 (set (make-local-variable 'comment-start) "#") 75 (set (make-local-variable 'parse-sexp-lookup-properties) t) 76 (set (make-local-variable 'syntax-propertize-function) #'ninja-syntax-propertize) 77 (setq font-lock-defaults '(ninja-keywords))) 78 79;; Run ninja-mode for files ending in .ninja. 80;;;###autoload 81(add-to-list 'auto-mode-alist '("\\.ninja$" . ninja-mode)) 82 83(provide 'ninja-mode) 84 85;;; ninja-mode.el ends here 86