gulpfile.js

sassLint = require('gulp-sass-lint');
 
gulp.task('sass-lint', function () {
    return gulp.src([
        'sass/**/*.scss',
        '!sass/dont-watch-this.scss'
    ])
    .pipe(sasslint())
    .pipe(sasslint.format())
    .pipe(sasslint.failOnError())
});