Forge Support

components/handler.js

@@ -143,31 +143,45 @@ module.exports.getForgeDependencies = async function(root, version, forgeJarPath
     }
     await new zip(forgeJarPath).extractEntryTo('version.json', path.join(root, 'forge', `${version.id}`), false, true)
 
-    const forgeLibs = require(path.join(root, 'forge', `${version.id}`, 'version.json')).libraries;
-    const marvenUrl = 'http://files.minecraftforge.net/maven/';
+    const forge = require(path.join(root, 'forge', `${version.id}`, 'version.json'));
+    const forgeLibs = forge.libraries;
+    const mavenUrl = 'http://files.minecraftforge.net/maven/';
+    const defaultRepo = 'https://libraries.minecraft.net/';
     const paths = [];
 
     const download = forgeLibs.map(async library => {
         const lib = library.name.split(':');
 
         if(lib[0] === 'net.minecraftforge' && lib[1].includes('forge')) return;
-        if(!library.url) return;
 
-        const url = `${marvenUrl}${lib[0].replace(/\./g, '/')}/${lib[1]}/${lib[2]}/${lib[1]}-${lib[2]}.jar`;
+        let url = mavenUrl;
         const jarPath = path.join(root, 'libraries', `${lib[0].replace(/\./g, '/')}/${lib[1]}/${lib[2]}`);
         const name = `${lib[1]}-${lib[2]}.jar`;
 
-        if(fs.existsSync(path.join(jarPath, name))) return;
+        if(!library.url) {
+            if(library.serverreq || library.clientreq) {
+                url = defaultRepo;
+            } else {
+                return
+            }
+        }
+
+        const downloadLink = `${url}${lib[0].replace(/\./g, '/')}/${lib[1]}/${lib[2]}/${lib[1]}-${lib[2]}.jar`;
+
+        if(fs.existsSync(path.join(jarPath, name))) {
+            paths.push(`${jarPath}\\${name}`);
+            return;
+        }
         if(!fs.existsSync(jarPath)) shelljs.mkdir('-p', jarPath);
 
-        await downloadAsync(url, jarPath, name);
+        await downloadAsync(downloadLink, jarPath, name);
 
-        paths.push(`${jarPath}//${name}`);
+        paths.push(`${jarPath}\\${name}`);
     })
 
     await Promise.all(download);
 
-    return paths;
+    return {paths, forge};
 };
 
 module.exports.getClasses = function (root, version) {

components/launcher.js

@@ -22,13 +22,12 @@ module.exports = async function (options) {
         await handler.getJar(versionFile, options.version.number, directory);
     }
 
-    const args = [];
+    let forge = null;
+    if(options.forge) {
+        forge = await handler.getForgeDependencies(options.root, versionFile, options.forge.path);
+    }
 
-    // CGC
-    args.push('-Xincgc');
-
-    // Memory
-    const memory = [`-Xmx${options.memory.max}M`];
+    const args = []
 
     // Jvm
     let jvm = [
@@ -36,24 +35,36 @@ module.exports = async function (options) {
         '-XX:-OmitStackTraceInFastThrow',
         '-Dfml.ignorePatchDiscrepancies=true',
         '-Dfml.ignoreInvalidMinecraftCertificates=true',
-        `-Djava.library.path=${nativePath}`
+        `-Djava.library.path=${nativePath}`,
+        `-Xmx${options.memory.max}M`,
+        '-Xincgc'
     ];
     jvm.push(await handler.getJVM(versionFile, options));
 
     const classes = await handler.getClasses(options.root, versionFile);
-    const classPaths = ['-cp'];
+    let mainClass;
+    const classPaths = [];
+    if(forge) {
+        classPaths.push(`${options.forge.path};${forge.paths.join(';')};${classes.join(';')};${mcPath}`);
+        mainClass = forge.forge.mainClass
+    } else {
+        classPaths.push('-cp');
         classPaths.push(`${mcPath};${classes.join(";")}`);
         classPaths.push(versionFile.mainClass);
+    }
 
     // Download version's assets
     await handler.getAssets(options.root, versionFile);
 
     // Launch options
     const launchOptions = await handler.getLaunchOptions(versionFile, options);
+    if(forge) launchOptions.push('--tweakClass net.minecraftforge.fml.common.launcher.FMLTweaker');
 
-    const arguments = args.concat(memory, jvm, classPaths, launchOptions);
-    const minecraft = child.spawn("java", arguments);
+    // NOTE: Hacky way of setting up launch options, will rework this next update.
+    let launchArguments = args.concat(jvm, classPaths, launchOptions);
+    if(forge) launchArguments = `${jvm.join(' ')} -cp ${classPaths} ${mainClass} ${launchOptions.join(' ')}`.split(' ');
 
+    const minecraft = child.spawn(`java`, launchArguments)
     event.emit('start', null);
     minecraft.stdout.on('data', (data) => event.emit('data', data));
     minecraft.stderr.on('data', (data) => event.emit('error', data));

package.json

@@ -1,7 +1,7 @@
 {
   "name": "minecraft-launcher-core",
-  "version": "1.2.1",
-  "description": "Module that downloads Minecraft assets and runs Minecraft.",
+  "version": "2.0.0",
+  "description": "Module that downloads Minecraft assets and runs Minecraft. Also Supports Forge",
   "main": "index.js",
   "dependencies": {
     "adm-zip": "^0.4.13",