grunt-sass-lint/tasks/sass-lint.js

Lint your sass using Node Sass Lint

'use strict';
var path = require('path'),
	lint = require('sass-lint');

module.exports = function (grunt) {
	grunt.verbose.writeln('\n' + lint.info + '\n');

	grunt.registerMultiTask('sasslint', 'Lint your Sass', function () {
		var opts = this.options({
				configFile: ''
			});
		var results = [];

		this.filesSrc.forEach(function (file) {
			results = results.concat(lint.lintFiles(file, opts, opts.configFile));
		});

		var resultCount = lint.resultCount(results),
        errorCount = lint.errorCount(results),
		    resultFormat = lint.format(results, { options: opts });

		if (resultCount > 0) {
			if(opts['outputFile']) {
				opts['output-file'] = opts['outputFile'];
				lint.outputResults(results, { options: opts });
			} else {
				grunt.log.writeln(resultFormat);
			}
      if (errorCount.count > 0) grunt.fail.warn('');
		}
	});
};