rollup.config.js

const path = require('path');
const alias = require('@rollup/plugin-alias');
const typescript = require('rollup-plugin-typescript');
const { nodeResolve } = require('@rollup/plugin-node-resolve');
const commonjs = require('@rollup/plugin-commonjs');
const { babel } = require('@rollup/plugin-babel');
const json = require('@rollup/plugin-json');
const { terser } = require('rollup-plugin-terser');

module.exports = function (config) {
  // const extensions = ['.ts', '.js'];

  config.forEach(v => {
    // just keep the reference for third-party libs
    v.external = ['plugin-error', 'through2', 'vue-template-compiler', '@vue/component-compiler', 'vinyl-sourcemaps-apply'];

    v.plugins.push(
      alias({
        entries: [
          { find: '@utils', replacement: path.resolve(__dirname, 'src/utils') }
        ]
      })
    )
  });

  // umd
  // config.push({
  //   input: 'src/index.ts',
  //   output: {
  //     file: 'umd/gulp-plugin-vue-sfc.min.js',
  //     format: 'umd',
  //     name: '$gulp-plugin-vue-sfc',
  //     exports: 'named',
  //     compact: true
  //   },
  //   plugins: [
  //     nodeResolve({
  //       extensions,
  //       preferBuiltins: true,
  //       browser: true
  //     }),
  //     commonjs(),
  //     typescript({
  //       target: 'es2015',
  //       module: 'ESNext',
  //       lib: ['es5', 'es6', 'es2015', 'es2016', 'dom'],
  //       declaration: false
  //     }),
  //     babel({
  //       exclude: 'node_modules/**',
  //       plugins: [['@babel/plugin-transform-runtime', { corejs: 3 }]],
  //       babelHelpers: 'runtime',
  //       extensions
  //     }),
  //     json(),
  //     terser()
  //   ]
  // });

  return config;
}