rollup.config.js

import path from "path";

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 alias from "@rollup/plugin-alias";

const projectRootDir = path.resolve(__dirname);

const aliases = alias({
  entries: [
    { find: "@hdt", replacement: path.resolve(projectRootDir, "src-ui/") },
  ],
});

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);
    },
  };
}

const bundles = [
  {
    input: "src-ui/main.ts",
    jsOutput: "public/build/bundle.js",
    cssOutput: "bundle.css",
    serve: serve,
    liveReload: "public",
  },
  {
    input: "src-ui/trackers/category/main.ts",
    jsOutput: "trackers/build/category/bundle.js",
    cssOutput: "bundle.css",
  },
  {
    input: "src-ui/trackers/session/run.ts",
    jsOutput: "trackers/build/session/run-bundle.js",
    cssOutput: "run-bundle.css",
  },
  {
    input: "src-ui/trackers/session/session.ts",
    jsOutput: "trackers/build/session/session-bundle.js",
    cssOutput: "session-bundle.css",
  },
  {
    input: "src-ui/trackers/pacifist/main.ts",
    jsOutput: "trackers/build/pacifist/bundle.js",
    cssOutput: "bundle.css",
  },
];

export default bundles.map((value) => {
  return {
    input: value.input,
    output: {
      sourcemap: !production,
      format: "iife",
      name: "app",
      file: value.jsOutput,
    },
    plugins: [
      aliases,
      svelte({
        preprocess: sveltePreprocess({
          sourceMap: !production,
        }),
        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: value.cssOutput }),

      // 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
      // Only for the first bundle so we don't start multiple servers
      !production && value.serve && value.serve(),

      // Watch the `public` directory and refresh the
      // browser on changes when not in production
      !production && value.liveReload && livereload(value.liveReload),

      // If we're building for production (npm run build
      // instead of npm run dev), minify
      production && terser(),
    ],
    watch: {
      clearScreen: false,
    },
  };
});