better-xcloud/build.ts

#!/usr/bin/env bun
import { readFile } from "node:fs/promises";
import { parseArgs } from "node:util";
import { sys } from "typescript";
import txtScriptHeader from "./src/assets/header_script.txt" with { type: "text" };
import txtMetaHeader from "./src/assets/header_meta.txt" with { type: "text" };
import { assert } from "node:console";

enum BuildTarget {
    ALL = 'all',
    ANDROID_APP = 'android-app',
    MOBILE = 'mobile',
    WEBOS = 'webos',
}

const postProcess = (str: string): string => {
    // Unescape unicode charaters
    str = unescape((str.replace(/\\u/g, '%u')));
    // Replace \x00 to normal character
    str = str.replaceAll(/\\x[A-F0-9]{2}/g, (e) => String.fromCharCode(parseInt(e.substring(2), 16)));

    // Replace "globalThis." with "var";
    str = str.replaceAll('globalThis.', 'var ');

    // Add ADDITIONAL CODE block
    str = str.replace('var DEFAULT_FLAGS', '\n/* ADDITIONAL CODE */\n\nvar DEFAULT_FLAGS');

    assert(str.includes('/* ADDITIONAL CODE */'));

    return str;
}

const build = async (target: BuildTarget, version: string, config: any={}) => {
    console.log('-- Target:', target);
    const startTime = performance.now();

    let outputScriptName = 'better-xcloud';
    if (target !== BuildTarget.ALL) {
        outputScriptName += `.${target}`;
    }
    let outputMetaName = outputScriptName;
    outputScriptName += '.user.js';
    outputMetaName += '.meta.js';

    const outDir = './dist';

    let output = await Bun.build({
        entrypoints: ['src/index.ts'],
        outdir: outDir,
        naming: outputScriptName,
        minify: {
            syntax: true,
        },
        define: {
            'Bun.env.BUILD_TARGET': JSON.stringify(target),
            'Bun.env.SCRIPT_VERSION': JSON.stringify(version),
        },
    });

    if (!output.success) {
        console.log(output);
        process.exit(1);
    }

    const {path} = output.outputs[0];
    // Get generated file
    let result = postProcess(await readFile(path, 'utf-8'));

    // Replace [[VERSION]] with real value
    const scriptHeader = txtScriptHeader.replace('[[VERSION]]', version);

    // Save to script
    await Bun.write(path, scriptHeader + result);
    console.log(`---- [${target}] done in ${performance.now() - startTime} ms`);

    // Create meta file
    await Bun.write(outDir + '/' + outputMetaName, txtMetaHeader.replace('[[VERSION]]', version));
}

const buildTargets = [
    BuildTarget.ALL,
    // BuildTarget.ANDROID_APP,
    // BuildTarget.MOBILE,
    // BuildTarget.WEBOS,
];

const { values, positionals } = parseArgs({
    args: Bun.argv,
    options: {
      version: {
        type: 'string',

      },
    },
    strict: true,
    allowPositionals: true,
  });

if (!values['version']) {
    console.log('Missing --version param');
    sys.exit(-1);
}

console.log('Building: ', values['version']);

const config = {};
for (const target of buildTargets) {
    await build(target, values['version']!!, config);
}