node-red-contrib-uibuilder/templates/svelte-basic/rollup.config.mjs

Easily create data-driven web UI's for Node-RED. Single- & Multi-page. Multiple UI's. Work with existing web development workflows or mix and match with no-code/low-code features.

// @ts-nocheck
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'

// Added for uibuilder - the build output folder
const uibDist = 'dist'

// Assume production mode if not running dev
const production = !process.env.ROLLUP_WATCH
console.log(`Production mode?: ${ production }. Output Folder: ${__dirname}/${uibDist}/build/`) // eslint-disable-line no-undef

/** Define the dev server
 * @returns {Function} writeBundle
 */
function serve() {
    let server

    function toExit() { // eslint-disable-line jsdoc/require-jsdoc
        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: 'iife',
        name: 'app',
        file: `${uibDist}/build/bundle.js`,
    },
    plugins: [
        svelte({
            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' }),

        // 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 `src` directory and refresh the
        // browser on changes when not in production
        !production && livereload(uibDist),

        // If we're building for production (npm run build
        // instead of npm run dev), minify
        production && terser({
            ecma: 2015, // ES6
            mangle: { toplevel: true },
            compress: {
                module: true,
                toplevel: true,
                unsafe_arrows: true,
                drop_console: production,
                drop_debugger: production,
            },
            output: { comments: false } ,
        }),
    ],
    watch: {
        clearScreen: false,
    },
}