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rollup.config.js
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rollup.config.js
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import svelte from 'rollup-plugin-svelte';
import commonjs from '@rollup/plugin-commonjs';
import resolve from '@rollup/plugin-node-resolve';
import livereload from 'rollup-plugin-livereload';
import { terser } from 'rollup-plugin-terser';
import sveltePreprocess from 'svelte-preprocess';
import typescript from '@rollup/plugin-typescript';
import css from 'rollup-plugin-css-only';
import babel from 'rollup-plugin-babel';
import replace from '@rollup/plugin-replace';
import json from '@rollup/plugin-json';
import { visualizer } from 'rollup-plugin-visualizer';
const production = !process.env.ROLLUP_WATCH;
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);
},
};
}
export default {
input: 'src/main.ts',
output: {
sourcemap: !production,
format: 'iife',
name: 'app',
file: 'public/build/bundle.js',
},
context: 'window',
plugins: [
svelte({
preprocess: sveltePreprocess({
sourceMap: !production,
typescript: {
compilerOptions: {
target: 'ES2015',
module: 'ES2015',
},
},
replace: [[/process\.env\.(\w+)/g, (_, prop) => JSON.stringify(process.env[prop])]],
}),
compilerOptions: {
// enable run-time checks when not in production
dev: !production,
},
}),
// we'll extract any component CSS out into
// a separate file - better for performance
css({ output: 'bundle.css' }),
babel({
extensions: ['.js', '.ts', '.mjs', '.html', '.svelte'],
runtimeHelpers: true,
exclude: ['node_modules/@babel/**'],
presets: [
[
'@babel/preset-env',
{
targets: { firefox: '48' },
exclude: ['@babel/plugin-transform-regenerator'],
},
],
],
plugins: [
'@babel/plugin-syntax-dynamic-import',
[
'@babel/plugin-transform-runtime',
{
useESModules: true,
regenerator: false,
},
],
],
}),
replace({
preventAssignment: true,
'process.env.NODE_ENV': !production ? "'development'" : "'production'",
}),
json(),
// 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(),
typescript({
sourceMap: !production,
inlineSources: !production,
}),
// In dev mode, call `npm run start` once
// the bundle has been generated
!production && serve(),
// Watch the `public` directory and refresh the
// browser on changes when not in production
!production && livereload('public'),
// If we're building for production (npm run build
// instead of npm run dev), minify
production && terser(),
production && visualizer(),
],
watch: {
clearScreen: false,
},
};