Minecraft Hashed Assets Remapper

assetsRemapper.mjs

/**
 * ToxicAven's Assets Remapper
 * @author ToxicAven
 * With proofreading by tycrek
 * @version 1.1.0
 * 
 * Remaps Minecraft's stupid hashed assets so you can decipher
 * what the texture parser is actually trying to accomplish
 * 
 * To use this script, simply place it in the .minecraft/assets folder
 * of your Minecraft installation, and run `node assetsRemapper.mjs`.
 * MultiMC users should run `node assetsRemapper.mjs` from the MultiMC assets folder.
 */

 import { readFileSync } from 'fs';
 import { mkdir, copyFile } from 'fs/promises';
 import { join } from 'path';
 const scriptVersion = "1.1.0";
 
 
 let deobfAssetsDir = 'extracted';
 let versionNumber = '1.19';
 
 
 const mappingsFile = join(process.cwd(), 'indexes', `${versionNumber}.json`);
 const mappingJson = JSON.parse(readFileSync(mappingsFile));
 const mapObjects = mappingJson.objects;
 let processingCount = 0;
 
 function main() {
     const keys = Object.keys(mapObjects);
     console.log(`ToxicAven's Assets Remapper ${scriptVersion}`);
     console.log(`Remapping ${keys.length} assets for version ${versionNumber}...`);
     mkdir(join(process.cwd(), deobfAssetsDir), { recursive: true });
     keys.forEach(async (key) => {
         const fileHash = mapObjects[key].hash;
         const sortingChars = fileHash.substring(0, 2);
         const extractedPath = join(process.cwd(), deobfAssetsDir, key.substring(0, key.lastIndexOf('/')));
         const fileName = key.substring(key.lastIndexOf('/') + 1);
         const objectPath = join(process.cwd(), 'objects', sortingChars, fileHash);
         mkdir(extractedPath, { recursive: true }).then(() => {
             copyFile(objectPath, join(extractedPath, fileName)).then(() => {
                 processingCount++;
                 process.stdout.write(`\rConverting obfuscated files... (File ${processingCount}/${keys.length})`);
                 if (processingCount == keys.length) console.log(`\nDone remapping assets for version ${versionNumber}!`);
             });
         });
     });
 };
 
 main();