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rollup.config.js
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rollup.config.js
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import commonjs from '@rollup/plugin-commonjs';
import resolve from '@rollup/plugin-node-resolve';
import { writeFileSync } from 'fs';
import copy from 'rollup-plugin-copy';
import css from 'rollup-plugin-css-only';
import livereload from 'rollup-plugin-livereload';
import svelte from 'rollup-plugin-svelte';
import { terser } from 'rollup-plugin-terser';
import sveltePreprocess from 'svelte-preprocess';
const mode = process.env.NODE_ENV;
const production = mode === 'production';
const preprocess = sveltePreprocess({
postcss: {
plugins: [
require('postcss-import'),
require('tailwindcss'),
require('autoprefixer'),
...(production ? [require('postcss-clean')] : []),
],
},
defaults: {
style: 'postcss',
},
});
export default {
input: 'src/main.js',
output: {
file: 'dist/bundle.js',
sourcemap: !production,
name: 'app',
format: 'iife',
},
plugins: [
copy({
targets: [
{ src: 'src/template.html', dest: 'dist', rename: 'index.html' },
{ src: 'static/**/*', dest: 'dist' },
],
}),
svelte({
compilerOptions: {
// enable run-time checks when not in production
dev: !production,
},
// preprocess svelte files
preprocess,
}),
css({
output: !production ? 'bundle.css' : (styles, styleNodes) => {
for (let filename of Object.keys(styleNodes)) {
if (filename.endsWith('App.css')) {
writeFileSync('./dist/critical.css', styleNodes[filename]);
}
}
writeFileSync('./dist/bundle.css', styles);
},
}),
// If you have external dependencies installed from
// npm, you'll most likely need these plugins. In
// some cases you'll need additional configuration -
// consult the documentation for details:
// https://github.com/rollup/plugins/tree/master/packages/commonjs
resolve({
browser: true,
dedupe: ['svelte'],
}),
commonjs(),
// In dev mode, call `npm run start` once
// the bundle has been generated
!production && serve(),
// Watch the `dist` directory and refresh the
// browser on changes when not in production
!production && livereload({
watch: ['dist/bundle.js', 'dist/bundle.css'],
}),
// If we're building for production (npm run build
// instead of npm run dev), minify
production && terser(),
],
watch: {
clearScreen: false,
},
};
function serve() {
let server;
function toExit() {
if (server) server.kill(0);
}
return {
writeBundle() {
if (server) return;
server = require('child_process').spawn('npm', ['run', 'start', '--', '--dev'], {
stdio: ['ignore', 'inherit', 'inherit'],
shell: true,
});
process.on('SIGTERM', toExit);
process.on('exit', toExit);
},
};
}