feat: rewrite entirely the modrinth installer and allow to update already installed modpack to a newer version

tests/modrinth-update.test.ts

@@ -0,0 +1,123 @@
+import { test } from "vitest";
+import {
+  Instance,
+  offlineAuth,
+  RuntimeManager,
+  getJavaComponent,
+  importModrinthModpack,
+} from "../dist/index.js";
+import path from "path";
+import fs from "fs/promises";
+
+const gameRoot = path.join(import.meta.dirname, "temp");
+await fs.rm(path.join(gameRoot, "instances", "modrinth_update"), {
+  recursive: true,
+  force: true,
+}); // remove instance dir each start to ensure that first launch works (else files from update will be used to start original)
+
+test(
+  "update modrinth modpack",
+  { timeout: 0, tags: ["modrinth"] },
+  async () => {
+    {
+      const modpack = await importModrinthModpack(
+        "https://cdn.modrinth.com/data/1KVo5zza/versions/JnvfUoIW/Fabulously.Optimized-v13.2.1.mrpack",
+      );
+
+      const javaManager = new RuntimeManager(path.join(gameRoot, "java"));
+      javaManager.on("progress", console.log);
+      const java = await javaManager.use(
+        await getJavaComponent(modpack.version),
+      );
+
+      const instance = new Instance({
+        auth: offlineAuth("player"),
+        paths: {
+          root: gameRoot,
+          instance: path.join(gameRoot, "instances", "modrinth_update"),
+        },
+        javaExecutable: java,
+        ram: { max: "4G", min: "4G" },
+        modrinth: modpack,
+      });
+
+      instance.on("progress", console.log);
+      instance.on("log", (step, msg) => {
+        console.log(`[${step}] ${msg}`);
+      });
+
+      await instance.install();
+      const p = await instance.launch();
+
+      p.stdout.on("data", (d: Buffer) => {
+        console.log(d.toString());
+      });
+
+      p.stderr.on("data", (d: Buffer) => {
+        console.log(d.toString());
+      });
+
+      await new Promise<void>((res) => {
+        p.on("error", (d: Buffer) => {
+          console.log(d.toString());
+          res();
+        });
+        p.on("close", () => {
+          console.log("closed");
+          res();
+        });
+      });
+    }
+
+    /*
+      to test that everything works i try to fully replace fabulously optimized by a completly different modpack
+      but it is intended to be used only to update from one modpack to its update
+    */
+    const modpack = await importModrinthModpack(
+      "https://cdn.modrinth.com/data/l9m9tuPN/versions/M8j2mfGj/Zombie%20Invade%20100%20Days%202.3.mrpack",
+      "https://cdn.modrinth.com/data/1KVo5zza/versions/JnvfUoIW/Fabulously.Optimized-v13.2.1.mrpack",
+    );
+    const javaManager = new RuntimeManager(path.join(gameRoot, "java"));
+    javaManager.on("progress", console.log);
+    const java = await javaManager.use(await getJavaComponent(modpack.version));
+
+    const instance = new Instance({
+      auth: offlineAuth("player"),
+      paths: {
+        root: gameRoot,
+        instance: path.join(gameRoot, "instances", "modrinth_update"),
+      },
+      javaExecutable: java,
+      ram: { max: "4G", min: "4G" },
+      modrinth: modpack,
+    });
+
+    instance.on("progress", console.log);
+    instance.on("log", (step, msg) => {
+      console.log(`[${step}] ${msg}`);
+    });
+
+    await instance.install();
+
+    const p = await instance.launch();
+
+    p.stdout.on("data", (d: Buffer) => {
+      console.log(d.toString());
+    });
+
+    p.stderr.on("data", (d: Buffer) => {
+      console.log(d.toString());
+    });
+
+    await new Promise<void>((res) => {
+      p.on("error", (d: Buffer) => {
+        console.log(d.toString());
+        res();
+      });
+      p.on("close", () => {
+        console.log("closed");
+        res();
+      });
+    });
+  },
+);