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rollup.config.js
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rollup.config.js
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import fs from 'fs';
import path from 'path';
import replace from '@rollup/plugin-replace';
import { babel } from '@rollup/plugin-babel';
import { terser } from 'rollup-plugin-terser';
import gzipSize from 'gzip-size';
import * as brotliSize from 'brotli-size';
import pkg from './package.json';
const input = './src/rgm.js';
const external = id =>
id.startsWith('.') === false && path.isAbsolute(id) === false;
const babelOptions = {
configFile: false,
babelrc: false,
babelHelpers: 'bundled',
presets: [
['@babel/preset-env', { bugfixes: true, loose: true }],
'@babel/flow',
'@babel/react',
],
};
export default [
{
input,
output: { file: pkg.main, format: 'cjs' },
external,
plugins: [
babel(babelOptions),
replace({ 'process.env.DOCUMENTATION': 'undefined' }),
],
},
{
input,
output: { file: pkg.module, format: 'esm' },
external,
plugins: [
babel(babelOptions),
replace({ 'process.env.DOCUMENTATION': 'undefined' }),
],
},
// to check esm production size
{
input,
output: { file: 'dist/rgm.esm.production.js', format: 'esm' },
external,
plugins: [
babel(babelOptions),
replace({
'process.env.DOCUMENTATION': 'undefined',
'process.env.NODE_ENV': JSON.stringify('production'),
}),
terser(),
{
generateBundle(outputOptions, bundle) {
let sizeInfo = '';
for (const [name, chunk] of Object.entries(bundle)) {
const parsedSize = chunk.code.length;
const gzippedSize = gzipSize.sync(chunk.code);
const brotliedSize = brotliSize.sync(chunk.code);
sizeInfo += `Size of ${name}
=============================
min: ${parsedSize} b
gzip: ${gzippedSize} b
brotli: ${brotliedSize} b`.replace(/^\s+/gm, '');
}
console.info(sizeInfo);
fs.writeFileSync('size-snapshot.txt', sizeInfo, 'utf-8');
},
},
],
},
];