CrabNebula Cloud with Tauri

CrabNebula is an official Tauri partner providing a platform for application distribution that seamlessly integrates with the Tauri updater. The platform offers global CDN distribution, release management, and built-in auto-update support.

Overview

CrabNebula Cloud provides:

• Global CDN: Worldwide distribution of installers and updates
• Release Channels: Support for multiple release tracks (stable, beta, nightly)
• Auto-Updates: Built-in update server compatible with Tauri’s updater plugin
• Download Metrics: Analytics for tracking application downloads
• CI/CD Integration: GitHub Actions support for automated releases

Initial Setup

1. Create CrabNebula Cloud Account

1. Navigate to CrabNebula Cloud
2. Sign in using GitHub or GitLab authentication
3. Create an organization with a unique slug
4. Create an application within your organization

2. Generate API Key

1. Navigate to API Keys section in CrabNebula Cloud
2. Generate a new key with Read/Write permissions
3. Save this key securely (displayed only once)
4. Add as CN_API_KEY repository secret in GitHub

Important: Use repository secrets, not environment secrets, as environment secrets may appear in logs.

CLI Installation

Install the CrabNebula CLI to manage releases locally:

# macOS/Linux
curl -L https://cdn.crabnebula.app/install/cn | sh

# Or via cargo
cargo install cn-cli

Release Workflow

The release process follows four steps: draft, upload, publish, fetch.

Manual CLI Commands

# Create a release draft
cn release draft ORG_SLUG/APP_SLUG VERSION

# Upload assets with Tauri framework detection
cn release upload ORG_SLUG/APP_SLUG RELEASE_ID --framework tauri

# Publish the release
cn release publish ORG_SLUG/APP_SLUG RELEASE_ID

# Fetch latest release info
cn release latest ORG_SLUG/APP_SLUG

Upload Command Options

cn release upload ORG_SLUG/APP_SLUG RELEASE_ID \
  --framework tauri \
  --channel stable \
  --update-platform linux-x86_64 \
  --file path/to/binary \
  --signature path/to/signature

GitHub Actions Workflow

Create .github/workflows/release.yml:

name: Release

on:
  push:
    branches:
      - main
  workflow_dispatch:

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

env:
  CN_APPLICATION: "your-org/your-app"

jobs:
  draft:
    runs-on: ubuntu-latest
    outputs:
      version: ${{ steps.read-version.outputs.version }}
    steps:
      - uses: actions/checkout@v4

      - name: Read version from tauri.conf.json
        id: read-version
        run: |
          VERSION=$(jq -r '.version' src-tauri/tauri.conf.json)
          echo "version=$VERSION" >> $GITHUB_OUTPUT

      - name: Create draft release
        uses: crabnebula-dev/cloud-release@v0
        with:
          command: release draft ${{ env.CN_APPLICATION }} ${{ steps.read-version.outputs.version }} --framework tauri
          api-key: ${{ secrets.CN_API_KEY }}

  build:
    needs: draft
    strategy:
      fail-fast: false
      matrix:
        include:
          - platform: ubuntu-22.04
            args: ""
          - platform: macos-latest
            args: "--target aarch64-apple-darwin"
          - platform: macos-latest
            args: "--target x86_64-apple-darwin"
          - platform: windows-latest
            args: ""
    runs-on: ${{ matrix.platform }}
    steps:
      - uses: actions/checkout@v4

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: lts/*

      - name: Install Rust stable
        uses: dtolnay/rust-action@stable
        with:
          targets: ${{ matrix.platform == 'macos-latest' && 'aarch64-apple-darwin,x86_64-apple-darwin' || '' }}

      - name: Install Linux dependencies
        if: matrix.platform == 'ubuntu-22.04'
        run: |
          sudo apt-get update
          sudo apt-get install -y libwebkit2gtk-4.1-dev libappindicator3-dev librsvg2-dev patchelf

      - name: Install frontend dependencies
        run: npm ci

      - name: Build Tauri app
        uses: tauri-apps/tauri-action@v0
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          TAURI_SIGNING_PRIVATE_KEY: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY }}
          TAURI_SIGNING_PRIVATE_KEY_PASSWORD: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY_PASSWORD }}
        with:
          args: ${{ matrix.args }}

      - name: Upload assets to CrabNebula Cloud
        uses: crabnebula-dev/cloud-release@v0
        with:
          command: release upload ${{ env.CN_APPLICATION }} --framework tauri
          api-key: ${{ secrets.CN_API_KEY }}

  publish:
    needs: [draft, build]
    runs-on: ubuntu-latest
    steps:
      - name: Publish release
        uses: crabnebula-dev/cloud-release@v0
        with:
          command: release publish ${{ env.CN_APPLICATION }} ${{ needs.draft.outputs.version }}
          api-key: ${{ secrets.CN_API_KEY }}

Auto-Updates Configuration

1. Generate Signing Keys

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

This creates:

• ~/.tauri/myapp.key – Private key (keep secret)
• ~/.tauri/myapp.key.pub – Public key (add to config)

Add to GitHub repository secrets:

• TAURI_SIGNING_PRIVATE_KEY: Contents of myapp.key
• TAURI_SIGNING_PRIVATE_KEY_PASSWORD: Your password

2. Configure tauri.conf.json

{
  "version": "0.1.0",
  "bundle": {
    "createUpdaterArtifacts": true
  },
  "plugins": {
    "updater": {
      "active": true,
      "endpoints": [
        "https://cdn.crabnebula.app/update/YOUR_ORG/YOUR_APP/{{target}}-{{arch}}/{{current_version}}"
      ],
      "dialog": true,
      "pubkey": "dW50cnVzdGVkIGNvbW1lbnQ6IG1pbmlzaWduIHB1YmxpYyBrZXk..."
    }
  }
}

Important: Keep the {{target}}, {{arch}}, and {{current_version}} placeholders unchanged. Tauri replaces these dynamically at runtime.

For migrations from Tauri v1, use "createUpdaterArtifacts": "v1Compatible".

3. Configure Capabilities

Update /src-tauri/capabilities/main.json:

{
  "$schema": "../gen/schemas/desktop-schema.json",
  "identifier": "main-capability",
  "description": "Main capability for the application",
  "windows": ["main"],
  "permissions": [
    "core:default",
    "dialog:default",
    "updater:default",
    "process:default",
    "process:allow-restart"
  ]
}

4. Install Dependencies

Add to src-tauri/Cargo.toml:

[dependencies]
tauri-plugin-updater = "2"
tauri-plugin-dialog = "2"
tauri-plugin-process = "2"

Install frontend packages:

npm install @tauri-apps/plugin-updater @tauri-apps/plugin-dialog @tauri-apps/plugin-process

5. Register Plugins (Rust)

Update src-tauri/src/lib.rs:

use tauri::Manager;

#[cfg_attr(mobile, tauri::mobile_entry_point)]
pub fn run() {
    tauri::Builder::default()
        .plugin(tauri_plugin_updater::Builder::new().build())
        .plugin(tauri_plugin_dialog::init())
        .plugin(tauri_plugin_process::init())
        .run(tauri::generate_context!())
        .expect("error while running tauri application");
}

6. Implement Update Check (TypeScript)

Create src/updater.ts:

import { check } from "@tauri-apps/plugin-updater";
import { ask } from "@tauri-apps/plugin-dialog";
import { relaunch } from "@tauri-apps/plugin-process";

export async function checkForAppUpdates(): Promise<void> {
  try {
    const update = await check();

    if (!update?.available) {
      console.log("No update available");
      return;
    }

    const proceed = await ask(
      `Version ${update.version} is available!\n\nRelease notes:\n${update.body}`,
      {
        title: "Update Available",
        kind: "info",
        okLabel: "Update Now",
        cancelLabel: "Later"
      }
    );

    if (proceed) {
      console.log("Downloading and installing update...");
      await update.downloadAndInstall();
      await relaunch();
    }
  } catch (error) {
    console.error("Update check failed:", error);
  }
}

Call early in your app lifecycle:

// React example
import { useEffect } from "react";
import { checkForAppUpdates } from "./updater";

function App() {
  useEffect(() => {
    checkForAppUpdates();
  }, []);

  return <div>Your app content</div>;
}

Release Channels

For multiple distribution channels (beta, stable, nightly):

Option 1: Channel Argument

# Create draft with channel
cn release draft ORG/APP VERSION --channel beta

# Upload must specify same channel
cn release upload ORG/APP RELEASE_ID --framework tauri --channel beta

Option 2: Separate Applications

Create separate applications in CrabNebula Cloud:

• your-org/your-app (stable)
• your-org/your-app-beta (beta)

Configure different update endpoints per channel in your app builds.

Environment Variables Summary

Troubleshooting

Update Check Fails

1. Verify endpoint URL matches your organization and app slugs
2. Ensure public key in config matches the generated key
3. Check that createUpdaterArtifacts is set to true
4. Verify capabilities include required permissions

Build Fails on Upload

1. Ensure CN_API_KEY is set as repository secret (not environment secret)
2. Verify the draft was created successfully before upload
3. Check that signing keys are properly configured

Signature Mismatch

1. Ensure TAURI_SIGNING_PRIVATE_KEY matches the public key in config
2. Verify the same key pair is used across all builds
3. For v1 migrations, use "createUpdaterArtifacts": "v1Compatible"

Resources

• CrabNebula Cloud Documentation
• Tauri Updater Plugin
• CrabNebula Cloud Release Action
• Tauri Distribution Guide