fvtt-te-deum/gulpfile.js

var gulp = require('gulp');

var postcss = require('gulp-postcss');

var autoprefixer = require('autoprefixer');
var cssnext = require('postcss-preset-env');
var precss = require('precss');

gulp.task('css', function () {

  var processors = [
    autoprefixer,
    cssnext,
    precss
  ];

  return gulp.src('./postcss/*.css')
    .pipe(postcss(processors))
    .pipe(gulp.dest('./styles'));
});


function watchUpdates() {
  gulp.watch('./postcss/*.css', css);
}