Koring Launcher

Minecraft launcher built with Tauri 2 + React 19 + TypeScript + Sidecar (Node.js/@xmcl).

Quick Start

pnpm install
pnpm dev:t          # full app (frontend + Rust + sidecar skip in dev)
pnpm dev            # frontend only (vite, port 1420)
cd sidecar && pnpm dev  # sidecar dev (tsx)

Build

pnpm tauri build         # production (auto-switches to run icon)
pnpm build:beta          # beta build
cd sidecar && pnpm compile  # compile sidecar to exe first

Architecture

src/                     Frontend (React 19 + Vite 7 + Tailwind v4 + shadcn/ui + Zustand)
src-tauri/               Backend (Rust/Tauri 2)
sidecar/                 Node.js sidecar (@xmcl/* packages)
public/                  Static assets (icons, fonts, images)
scripts/                 Build scripts

IPC Flow: Frontend → invoke() → Rust commands → sidecar stdin → sidecar stdout → Tauri events → Frontend

Project Structure

src/
├── api/                  # Frontend API layer (sidecar IPC wrappers)
│   ├── sidecar.ts        # Generic request/response
│   ├── background.ts     # Background control
│   ├── install.ts        # Minecraft install
│   ├── launch.ts         # Game launch
│   ├── auth.ts           # Microsoft/offline auth
│   ├── mods.ts           # Modrinth/CurseForge
│   └── instance.ts       # Instance management
├── stores/               # Zustand state stores
├── components/
│   ├── background/       # Background layer (z-0)
│   ├── system/           # Title bar + window controls (z-100)
│   └── ui/               # shadcn/ui components
├── layouts/
│   └── RootLayout.tsx    # Three-layer page structure
├── pages/
│   ├── Home.tsx          # Main page
│   └── Debug.tsx         # Debug tools
├── lib/
│   ├── mode.ts           # Build mode detection (dev/beta/run)
│   └── utils.ts          # cn() helper
└── App.tsx               # Root component with state router

Three-Layer Page Structure

┌──────────────────────────────────────┐
│  z-index: 100  System Layer          │  pointer-events: none
│  ┌──────────────────────────────┐    │
│  │ TitleBar (frosted glass)     │    │  pointer-events: auto
│  │ WindowControls (25px btns)   │    │
│  └──────────────────────────────┘    │
├──────────────────────────────────────┤
│  z-index: 1   Content Layer          │  pointer-events: auto
│  All page content                    │
├──────────────────────────────────────┤
│  z-index: 0   Background Layer       │  pointer-events: none
│  Image / color / gradient / blur     │
└──────────────────────────────────────┘

Splash Screen

• Standalone HTML/CSS (splash.html), no React/Vite dependency
• Loads instantly while Vite dev server starts
• Window: 480×320, no decorations, transparent, locked size
• Auto-adapts to system dark mode (prefers-color-scheme)
• Logo: filter: invert(1) in dark mode

Icon System

Three icon variants in public/:

Mode	File	Use Case
dev	dev.png / dev.ico	Development
beta	beta.png / beta.ico	Testing
run	run.png / run.ico	Production release

Auto-switching: Build scripts automatically copy the correct icon to src-tauri/icons/ before building.

Frontend usage:

import { APP_ICON, BUILD_MODE, isDev } from "@/lib/mode";

<img src={APP_ICON} />
{isDev && <span>Dev Mode</span>}

Manual switch:

pnpm icon:dev    # switch to dev icon
pnpm icon:beta   # switch to beta icon
pnpm icon:run    # switch to release icon

Sidecar

Node.js process communicating with Rust via stdin/stdout JSON protocol.

Handlers:

• install:* — Minecraft install, mod loader, version lists
• launch:* — Game launch, diagnose
• auth:* — Microsoft OAuth, offline login
• mods:* — Modrinth/CurseForge search, install
• instance:* — Instance CRUD
• background:* — Background image/color/blur/animation/theme

Compile:

cd sidecar
pnpm compile        # ARM64 Windows (default)
pnpm compile:x64    # x86_64 Windows

Key Gotchas

• Sidecar binary required: src-tauri/binaries/koring-sidecar-<target-triple>.exe must exist. Skipped in debug mode (#[cfg(debug_assertions)]).
• @xmcl packages are Node.js only: @xmcl/core, @xmcl/installer require fs/child_process. Only @xmcl/user, @xmcl/modrinth, @xmcl/curseforge work in browser.
• Path alias: @/ maps to src/.
• Window dragging: Use appWindow.startDragging() API, not data-tauri-drag-region (unreliable with transparent windows).
• Transparent windows: Require decorations: false + transparent: true in tauri.conf.json.
• Permissions: Window creation needs core:webview:allow-create-webview-window (not core:window).

Tech Stack

Layer	Technology
Frontend	React 19, Vite 7, Tailwind CSS v4, shadcn/ui, Zustand
Backend	Rust, Tauri 2
Sidecar	Node.js, TypeScript, @xmcl/* packages
Build	pnpm, Cargo, bun (sidecar compile)