rollup.config.js

import babel from "@rollup/plugin-babel";
import resolve from "@rollup/plugin-node-resolve";
import replace from "@rollup/plugin-replace";
import getPath from "platform-folders";
import { terser } from "rollup-plugin-terser";

// Environment variables
const build = process.env.BUILD || "development";
const isDev = build === "development";
const extensions = [".js", ".ts"];

/**
 * Tip: if you change the path here to your personal user folder,
 * you can ignore this change in git with:
 * ```
 * > git update-index --skip-worktree rollup.config.js
 * ```
 * To accept changes on this file again, use:
 * ```
 * > git update-index --no-skip-worktree rollup.config.js
 * ```
 */
function getOutput() {
    if (!isDev) return "./dist/WetPaintPlugin.js";

    const pluginPath = "OpenRCT2/plugin/WetPaintPlugin.js";
    switch (process.platform) {
        case "win32":
            return `${getPath("documents")}/${pluginPath}`;
        default:
            return `${getPath("userData")}/${pluginPath}`; // for both Mac and Linux
    }
}

/**
 * @type {import("rollup").RollupOptions}
 */
const config = {
    input: "./src/registerPlugin.ts",
    output: {
        file: getOutput(),
        format: "iife",
    },
    plugins: [
        resolve({
            extensions,
        }),
        replace({
            extensions,
            include: "./src/environment.ts",
            preventAssignment: true,
            values: {
                __BUILD_CONFIGURATION__: JSON.stringify(build),
            },
        }),
        babel({
            assumptions: {
                constantReexports: true,
                constantSuper: true,
                enumerableModuleMeta: true,
                ignoreFunctionLength: true,
                ignoreToPrimitiveHint: true,
                iterableIsArray: true,
                mutableTemplateObject: true,
                noClassCalls: true,
                noDocumentAll: true,
                noIncompleteNsImportDetection: true,
                noNewArrows: true,
                objectRestNoSymbols: true,
                privateFieldsAsProperties: true,
                pureGetters: true,
                setClassMethods: true,
                setComputedProperties: true,
                setPublicClassFields: true,
                setSpreadProperties: true,
                skipForOfIteratorClosing: true,
                superIsCallableConstructor: true,
            },
            babelHelpers: "bundled",
            babelrc: false,
            extensions,
            presets: ["@babel/preset-env", "@babel/preset-typescript"],
        }),
        terser({
            compress: {
                passes: 5,
                toplevel: true,
                unsafe: true,
            },
            format: {
                comments: false,
                quote_style: 1,
                wrap_iife: true,
                preamble:
                    "// Get the latest version: https://github.com/Basssiiie/OpenRCT2-RideVehicleEditor",

                beautify: isDev,
            },
            mangle: {
                properties: {
                    regex: /^_/,
                },
            },

            // Useful only for stacktraces:
            keep_fnames: isDev,
        }),
    ],
};
export default config;