Wepy/scripts/build.js

const path = require('path');
const fs = require('fs-extra');
const rollup = require('rollup');
const zlib = require('zlib');
const config = require('./config');

function build(config) {
  let output = config.output;
  let { file } = output;

  return rollup
    .rollup(config)
    .then(bundle => bundle.generate(output))
    .then(rst => {
      write(file, rst.code);
    })
    .catch(e => {
      throw e;
    });
}

function write(dest, code, zip) {
  return new Promise((resolve, reject) => {
    function report(extra) {
      // eslint-disable-next-line
      console.log(blue(path.relative(process.cwd(), dest)) + ' ' + getSize(code) + (extra || ''));
      resolve();
    }

    fs.outputFile(dest, code)
      .then(() => {
        if (zip) {
          zlib.gzip(code, (err, zipped) => {
            if (err) return reject(err);
            report(' (gzipped: ' + getSize(zipped) + ')');
          });
        } else {
          report();
        }
      })
      .catch(reject);
  });
}

function getSize(code) {
  return (code.length / 1024).toFixed(2) + 'kb';
}

function blue(str) {
  return '\x1b[1m\x1b[34m' + str + '\x1b[39m\x1b[22m';
}

let configs = config.getAllBuilds();

configs.forEach(config => {
  build(config);
});