rollup.config.js

import resolve from "@rollup/plugin-node-resolve";
import terser from "@rollup/plugin-terser";
import typescript from "@rollup/plugin-typescript";
import { exec } from "child_process";
import { homedir } from "os";
import { promisify } from "util";

const options =
{
  filename: "OpenRct2-Cartographer.js",
  build: process.env.BUILD || "development"
};

async function getOutput() {
  if (options.build !== "development") {
    return `./dist/${options.filename}`;
  }

  const platform = process.platform;
  const pluginPath = `OpenRCT2/plugin/${options.filename}`;

  if (platform === "win32") { // Windows
    const { stdout } = await promisify(exec)("powershell -command \"[Environment]::GetFolderPath('MyDocuments')\"");
    return `${stdout.trim()}/${pluginPath}`;
  }
  else if (platform === "darwin") { // MacOS
    return `${homedir()}/Library/Application Support/${pluginPath}`;
  }
  else { // Linux
    const configFolder = process.env.XDG_CONFIG_HOME || `${homedir()}/.config`;
    return `${configFolder}/${pluginPath}`;
  }
}

/**
 * @type {import("rollup").RollupOptions}
 */
const config = {
  input: "./src/plugin.ts",
  output: {
    file: await getOutput(),
    format: "iife",
    compact: true
  },
  treeshake: "smallest",
  plugins: [
    resolve(),
    typescript(),
    terser({
      compress: {
        passes: 5,
        toplevel: true,
        unsafe: true
      },
      format: {
        comments: false,
        quote_style: 1,
        wrap_iife: true,
        beautify: (options.build === "development"),
      }
    })
  ]
};
export default config;