Pass through --fix to stylelint options

Fixes #91

README.md

@@ -60,6 +60,7 @@ grunt.initConfig( {
       failOnError: true,
       outputFile: '',
       reportNeedlessDisables: false,
+      fix: false,
       syntax: ''
     },
     src: [
@@ -104,6 +105,12 @@ Default value: `true`
 
 Whether to fail if stylelint detects an error.
 
+#### syntax
+Type: `boolean`
+Default value: `false`
+
+Automatically fix, where possible, violations reported by rules. If `grunt` is run with `--fix` and this is not explicitly set, it will be set to `true`.
+
 #### syntax
 Type: `string`
 Values: `"scss"`|`"less"`|`"sugarss"`

tasks/grunt-stylelint.js

@@ -25,13 +25,17 @@ module.exports = function ( grunt ) {
 		const options = this.options(),
 			done = this.async(),
 			styleLint = require( 'stylelint' ),
-			verbose = !!grunt.option( 'verbose' );
+			verbose = !!grunt.option( 'verbose' ),
+			fix = !!grunt.option( 'fix' );
 
-		options.failOnError = ( typeof options.failOnError !== 'undefined' ) ? options.failOnError : true;
+		options.failOnError = options.failOnError !== undefined ? options.failOnError : true;
+
+		options.fix = options.fix !== undefined ? options.fix : fix;
 
 		options.files = this.filesSrc.filter( function ( file ) {
 			return grunt.file.isFile( file );
 		} );
+
 		options.formatter = options.formatter || ( verbose ? 'verbose' : 'string' );
 
 		// Explicitly allow no files, as otherwise stylelint itself throws an error.