materio-base-d7/sites/all/themes/gui/materiobasetheme/gulpfile.js

'use strict';

var gulp = require('gulp');
var sass = require('gulp-sass');
var watch = require('gulp-watch');
var autoprefixer = require('gulp-autoprefixer');
var jsmin = require('gulp-jsmin');
var rename = require('gulp-rename');

function handleError(err) {
  console.log(err.toString());
  // this.emit('end');
}

gulp.task('scripts', done => {
  gulp.src('./js/script.js')
      .pipe(jsmin())
      .pipe(rename({suffix: '.min'}))
      .pipe(gulp.dest('./js/'));
  done();
});

gulp.task('styles', done => {
  gulp.src('./scss/styles.scss')
    .pipe(sass().on('error', sass.logError))
    // .pipe(gulp.dest('./css/'));

  // gulp.src('./css/*.css')
    .pipe(autoprefixer({
        cascade: false
    })).on('error', handleError)
    .pipe(gulp.dest('./css/'));
  done();
});

// default gulp task
gulp.task('default', gulp.series('scripts', 'styles', function(done) {
  gulp.watch('./scss/*.scss', gulp.series('styles'));
  gulp.watch('./js/script.js', gulp.series('scripts'));
  done()
}));