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86 lines
3.3 KiB
EmacsLisp
86 lines
3.3 KiB
EmacsLisp
;;; ninja-mode.el --- Major mode for editing .ninja files -*- lexical-binding: t -*-
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;; Package-Requires: ((emacs "24"))
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;; Copyright 2011 Google Inc. All Rights Reserved.
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;;
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;; Licensed under the Apache License, Version 2.0 (the "License");
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;; you may not use this file except in compliance with the License.
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;; You may obtain a copy of the License at
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;;
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;; http://www.apache.org/licenses/LICENSE-2.0
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;;
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;; Unless required by applicable law or agreed to in writing, software
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;; distributed under the License is distributed on an "AS IS" BASIS,
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;; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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;; See the License for the specific language governing permissions and
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;; limitations under the License.
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;;; Commentary:
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;; Simple emacs mode for editing .ninja files.
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;; Just some syntax highlighting for now.
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;;; Code:
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(defvar ninja-keywords
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`((,(concat "^" (regexp-opt '("rule" "build" "subninja" "include"
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"pool" "default")
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'words))
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. font-lock-keyword-face)
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("\\([[:alnum:]_]+\\) =" 1 font-lock-variable-name-face)
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;; Variable expansion.
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("$[[:alnum:]_]+" . font-lock-variable-name-face)
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("${[[:alnum:]._]+}" . font-lock-variable-name-face)
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;; Rule names
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("rule +\\([[:alnum:]_.-]+\\)" 1 font-lock-function-name-face)
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;; Build Statement - highlight the rule used,
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;; allow for escaped $,: in outputs.
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("build +\\(?:[^:$\n]\\|$[:$]\\)+ *: *\\([[:alnum:]_.-]+\\)"
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1 font-lock-function-name-face)))
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(defvar ninja-mode-syntax-table
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(let ((table (make-syntax-table)))
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(modify-syntax-entry ?\" "." table)
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table)
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"Syntax table used in `ninja-mode'.")
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(defun ninja-syntax-propertize (start end)
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(save-match-data
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(goto-char start)
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(while (search-forward "#" end t)
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(let ((match-pos (match-beginning 0)))
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(when (and
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;; Is it the first non-white character on the line?
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(eq match-pos (save-excursion (back-to-indentation) (point)))
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(save-excursion
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(goto-char (line-end-position 0))
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(or
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;; If we're continuting the previous line, it's not a
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;; comment.
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(not (eq ?$ (char-before)))
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;; Except if the previous line is a comment as well, as the
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;; continuation dollar is ignored then.
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(nth 4 (syntax-ppss)))))
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(put-text-property match-pos (1+ match-pos) 'syntax-table '(11))
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(let ((line-end (line-end-position)))
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;; Avoid putting properties past the end of the buffer.
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;; Otherwise we get an `args-out-of-range' error.
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(unless (= line-end (1+ (buffer-size)))
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(put-text-property line-end (1+ line-end) 'syntax-table '(12)))))))))
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;;;###autoload
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(define-derived-mode ninja-mode prog-mode "ninja"
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(set (make-local-variable 'comment-start) "#")
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(set (make-local-variable 'parse-sexp-lookup-properties) t)
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(set (make-local-variable 'syntax-propertize-function) #'ninja-syntax-propertize)
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(setq font-lock-defaults '(ninja-keywords)))
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;; Run ninja-mode for files ending in .ninja.
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;;;###autoload
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(add-to-list 'auto-mode-alist '("\\.ninja$" . ninja-mode))
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(provide 'ninja-mode)
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;;; ninja-mode.el ends here
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