@gelight/sml-editor/rollup.config.js

Web component for a simple SML editor

import packageJson from './package.json';
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 css from 'rollup-plugin-css-only';

const production = !process.env.ROLLUP_WATCH;
const BUILD_DIR = 'dist'
const COMPONENT_NAME = packageJson.name.replace('@gelight/', '');
const APP_NAME = COMPONENT_NAME.replace(/-/g, '_');

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.js",
    output: {
        sourcemap: true,
        format: "umd",
        name: APP_NAME,
        file: "public/" + BUILD_DIR + "/" + COMPONENT_NAME + ".min.js",
    },
    plugins: [
        svelte({
            compilerOptions: {
                customElement: true,
                // 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: COMPONENT_NAME + ".min.css" }),

        // 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 `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(),
    ],
    watch: {
        clearScreen: false,
    },
};