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;;; scss-mode.el --- Major mode for editing SCSS files
;; Author: Anton Johansson <> -
;; URL:
;; Created: Sep 1 23:11:26 2010
;; Version: 0.5.0
;; Keywords: scss css mode
;; 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 2 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
;; PURPOSE. See the GNU General Public License for more details.
;;; Commentary:
;; Command line utility sass is required, see
;; To install sass (haml):
;; gem install haml
;; Also make sure sass location is in emacs PATH, example:
;; (setq exec-path (cons (expand-file-name "~/.gem/ruby/1.8/bin") exec-path))
;; or customize `scss-sass-command' to point to your sass executable.
;;; Code:
(require 'derived)
(require 'compile)
(require 'flymake)
(defgroup scss nil
"Scss mode"
:prefix "scss-"
:group 'css)
(defcustom scss-sass-command "sass"
"Command used to compile SCSS files, should be sass or the
complete path to your sass runnable example:
:group 'scss)
(defcustom scss-compile-at-save t
"If not nil the SCSS buffers will be compiled after each save"
:type 'boolean
:group 'scss)
(defcustom scss-sass-options '()
"Command line Options for sass executable, for example:
'(\"--cache-location\" \"'/tmp/.sass-cache'\")"
:group 'scss)
(defcustom scss-output-directory nil
"Output directory for compiled files, for example:
:group 'scss)
(defcustom scss-compile-error-regex '("\\(Syntax error:\s*.*\\)\n\s*on line\s*\\([0-9]+\\) of \\([^, \n]+\\)" 3 2 nil nil 1)
"Regex for finding line number file and error message in
compilation buffers, syntax from
`compilation-error-regexp-alist' (REGEXP FILE LINE COLUMN TYPE
:group 'scss)
(defconst scss-font-lock-keywords
;; Variables
'(("$[a-z_-][a-z-_0-9]*" . font-lock-constant-face)))
(defun scss-compile-maybe()
"Runs `scss-compile' on if `scss-compile-at-save' is t"
(if scss-compile-at-save
(defun scss-compile()
"Compiles the directory belonging to the current buffer, using the --update option"
(compile (concat scss-sass-command " " (mapconcat 'identity scss-sass-options " ") " --update "
(when (string-match ".*/" buffer-file-name)
(concat "'" (match-string 0 buffer-file-name) "'"))
(when scss-output-directory
(concat ":'" scss-output-directory "'")))))
(define-derived-mode scss-mode css-mode "SCSS"
"Major mode for editing SCSS files,
Special commands:
(font-lock-add-keywords nil scss-font-lock-keywords)
;; Add the single-line comment syntax ('//', ends with newline)
;; as comment style 'b' (see "Syntax Flags" in elisp manual)
(modify-syntax-entry ?/ ". 124b" css-mode-syntax-table)
(modify-syntax-entry ?\n "> b" css-mode-syntax-table)
(add-to-list 'compilation-error-regexp-alist scss-compile-error-regex)
(add-hook 'after-save-hook 'scss-compile-maybe nil t))
(define-key scss-mode-map "\C-c\C-c" 'scss-compile)
(defun flymake-scss-init ()
"Flymake support for SCSS files"
(let* ((temp-file (flymake-init-create-temp-buffer-copy
(local-file (file-relative-name
(file-name-directory buffer-file-name))))
(list scss-sass-command (append scss-sass-options (list "--scss" "--check" local-file)))))
(push '(".+\\.scss$" flymake-scss-init) flymake-allowed-file-name-masks)
;;;; TODO: Not possible to use multiline regexs flymake? flymake-err-[line]-patterns
;; '("Syntax error:\s*\\(.*\\)\n\s*on line\s*\\([0-9]+\\) of \\([^ ]+\\)$" 3 2 nil 1)
(push '("on line \\([0-9]+\\) of \\([^ ]+\\)$" 2 1 nil 2) flymake-err-line-patterns)
(add-to-list 'auto-mode-alist '("\\.scss\\'" . scss-mode))
(provide 'scss-mode)
;;; scss-mode.el ends here