tauri-latest-json

Generate a latest.json file for Tauri auto-updates, supporting multi-platform builds (Windows, macOS Intel/ARM, Linux).

This crate scans your Tauri bundle directory for installers, signs each one with your Tauri private key, and outputs a valid latest.json for the Tauri Updater.

✨ Features

Supports .msi, .exe, .dmg (Intel & ARM), tar.gz (ARM) and .AppImage
Automatically detects platform from installer filename
Reads version from package.json or Cargo.toml
Outputs a fully valid latest.json with multiple platforms
Easy to integrate into CI/CD pipelines

📦 Installation

Add to Cargo.toml:

[dependencies]
tauri-latest-json = "0.2.0"

📦 Run the example

cargo run --example basic

If the paths are correct, you’ll get:

✅ latest.json generated successfully

And a latest.json file in your project root.

🚀 Usage

// src/bin/latest_json.rs
use tauri_latest_json::generate_latest_json_auto;

fn main() {
    let download_url = "https://example.com/downloads";
    let release_notes = "Initial release";

    match generate_latest_json_auto(download_url, release_notes) {
        Ok(_) => println!("✅ latest.json generated successfully"),
        Err(e) => eprintln!("❌ Failed to generate latest.json: {e}"),
    }
}

// package.json

  "scripts": {
    ...
    "tauri:build": "pnpm tauri build && cd src-tauri && cargo run --bin latest_json"
  },

After running pnpm tauri:build, you'll get:

{
  "version": "1.0.0",
  "notes": "Initial release",
  "pub_date": "2025-08-19T19:44:22Z",
  "platforms": {
    "windows-x86_64": {
      "signature": "base64-signature-here",
      "url": "https://example.com/downloads/app_1.0.0_x64_en-US.msi"
    },
    "darwin-x86_64": {
      "signature": "...",
      "url": "..."
    },
    "linux-x86_64": {
      "signature": "...",
      "url": "..."
    }
  }
}

🔑 Requirements

A valid Tauri updater setup: See on Tauri Updater

A valid Tauri private key:

pnpm tauri signer generate -w ~/.tauri/myapp.key

🛠 Platform detection

File Extension	Platform Key
`.msi`, `.exe`	`windows-x86_64`
`.dmg` (Intel)	`darwin-x86_64`
`.dmg` (ARM)	`darwin-aarch64`
`.tar.gz` (ARM)	`darwin-aarch64`
`.AppImage`	`linux-x86_64`

📄 License

Licensed under the MIT License — see LICENSE for details.

tauri-latest-json 0.2.0