@kitten-science/kitten-scientists/lib/devcontainer/entrypoint-devcontainer.js

Add-on for the wonderful incremental browser game: https://kittensgame.com/web/

#!/usr/bin/env node
import { spawn } from "node:child_process";
import { readdirSync } from "node:fs";
import { readFile, writeFile } from "node:fs/promises";
import { join } from "node:path";
import { redirectErrorsToStream } from "@oliversalzburg/js-utils/errors/stream.js";
import * as cheerio from "cheerio";
const main = async () => {
    const indexHtml = await readFile("index.html", { encoding: "utf8" });
    const injectables = readdirSync("overlay")
        .filter(_ => _.endsWith(".inject.js"))
        .map(_ => join("overlay", _));
    const $ = cheerio.load(indexHtml);
    // First script block is NewRelic
    $("script").first().remove();
    // Google stuff
    $("script[src='https://www.googletagmanager.com/gtag/js?id=G-0QBDX221PR'] + script").remove();
    $("script[src='https://www.googletagmanager.com/gtag/js?id=G-0QBDX221PR']").remove();
    // Remove Crowdjet (removed upstream. retained here for legacy support.)
    $("script[src='https://crowdin.com/js/crowdjet/crowdjet.js']").remove();
    $("#crowdjet-container").remove();
    $("#crowdjet-expand-container").remove();
    // Move all JS to external file.
    const cacheBreaker = "1494-8094d2a0f18a0987ea7f08a0cc0d0f50a755d15f";
    const indexJs = $("script:not([src])")
        .text()
        // 1494 is the base version of the game. 8094d2a0f18a0987ea7f08a0cc0d0f50a755d15f is a commit hash from this tree.
        .replaceAll(/Date.now\(\)/g, `"${cacheBreaker}"`);
    await writeFile("index.js", indexJs);
    $("script:not([src])").remove();
    $("html").append('<script type="text/javascript" src="index.js"></script>');
    process.stderr.write(`Injecting ${injectables.join(",")}...\n`);
    $("html").append(`<script type="text/javascript">
      const scripts = ${JSON.stringify(injectables)};
      for (const subject of scripts) {
        const script = document.createElement("script");
        script.src = subject + "?_=${cacheBreaker}";
        script.type = "text/javascript";
        document.body.appendChild(script);
      }
      </script>`);
    // Write result back to file.
    await writeFile("index.html", $.html());
    const httpServer = spawn("yarn", ["run", "watch-http-server", "-p", "8080"], { shell: true });
    httpServer.stdout.on("data", data => {
        process.stderr.write(`stdout: ${data}`);
    });
    httpServer.stderr.on("data", data => {
        process.stderr.write(`stderr: ${data}`);
    });
    httpServer.on("close", code => {
        process.stderr.write(`Child process exited with code ${code}. Exiting.\n`);
        process.exit(code);
    });
    for (const signal of ["SIGINT", "SIGTERM", "SIGQUIT"]) {
        process.on(signal, () => {
            httpServer.kill(signal);
            process.exit();
        });
    }
};
main().catch(redirectErrorsToStream(process.stderr));
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