const sass        = require('gulp-sass');
const prefix      = require('gulp-autoprefixer');
const cleanCSS    = require('gulp-clean-css');

const scssPath    = '_scss/*.scss';
const destPath    = '_site/css';

module.exports = gulp => {

  gulp.task('sass', () => {
    return gulp.src(scssPath)
      .pipe(sass({
        includePaths: ['scss'],
        outputStyle: 'expanded'
      }))
      .pipe(prefix({
        browsers: ['last 2 versions'],
        cascade: false
      }))
      .pipe(cleanCSS({ compatibility: 'ie8' }))
      .pipe(gulp.dest(destPath))
      .pipe(gulp.dest('css'));
  });

};