taskfile

Mobile App Publishing Example

Publishing mobile applications (Flutter) to App Store and Google Play Store.

Supported Platforms

Platform Internal Testing Production
iOS TestFlight App Store
Android Internal Track, Firebase Play Store

Quick Start

# Initialize project
taskfile run init

# Development
taskfile run dev              # Start dev mode
taskfile run test             # Run tests
taskfile run analyze          # Static analysis

# Build
taskfile --platform ios run build-ios              # iOS IPA
taskfile --platform android run build-android-aab  # Android AAB

# Staging (Internal Testing)
taskfile --env staging run release-staging

# Production (App Store + Play Store)
taskfile --env prod run release-production

Setup

1. Initialize

taskfile run init

Creates .env.local with placeholders:

2. iOS Setup (macOS required)

Install dependencies:

brew install fastlane

Setup certificates:

taskfile run setup-ios-cert

Or manually:

cd ios && fastlane match development
cd ios && fastlane match appstore

Configure .env.prod:

APPLE_ID=your@email.com
APPLE_TEAM_ID=ABCDEF1234
FASTLANE_PASSWORD=your-password

3. Android Setup

Create keystore:

taskfile run setup-android-keystore

Download Play Store key:

  1. Google Play Console → Setup → API Access
  2. Create Service Account → Download JSON key
  3. Save as android/play-store-key.json

Configure .env.prod:

PLAYSTORE_JSON=android/play-store-key.json

4. Firebase (optional, for distribution)

npm install -g firebase-tools
firebase login:ci

Set in .env:

FIREBASE_TOKEN=your-token
FIREBASE_APP_ID=1:123456789:android:abcdef
FIREBASE_DIST=true

Publishing Flow

┌─────────────┐    ┌─────────────────────┐    ┌───────────────────┐
│ Development │───▶│ Internal Testing    │───▶│ Production        │
│             │    │                     │    │                   │
│ • Local dev │    │ • TestFlight (iOS)  │    │ • App Store       │
│ • Tests     │    │ • Internal Track    │    │ • Play Store      │
│ • Build     │    │ • Firebase Dist     │    │ • Public release  │
└─────────────┘    └─────────────────────┘    └───────────────────┘

Task Reference

Development Tasks

Task Description
dev Start Flutter dev mode
test Run unit/widget tests
analyze Static analysis
install Install dependencies

Build Tasks

Task Platform Output
build-ios iOS .ipa for App Store
build-android-apk Android .apk for Firebase
build-android-aab Android .aab for Play Store
build-all Both All artifacts

Setup Tasks

Task Description
setup-ios-cert Setup iOS certificates (Fastlane match)
setup-android-keystore Create Android keystore

Staging Tasks (Internal Testing)

Task Platform Channel
deploy-testflight iOS TestFlight
deploy-play-internal Android Play Store Internal
deploy-firebase Android Firebase App Distribution
release-staging Both All staging channels

Production Tasks

Task Platform Store
release-appstore iOS App Store
release-playstore Android Play Store
release-production Both Both stores

Environment Strategy

Environment Use Case Channels
local Development Local device/simulator
staging QA, Beta testers TestFlight, Internal Track, Firebase
prod Public release App Store, Play Store

CI/CD Integration

GitHub Actions

name: Mobile CI/CD
on:
  push:
    branches: [main]
  workflow_dispatch:

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: subosito/flutter-action@v2
      - run: flutter pub get
      - run: taskfile run test
      - run: taskfile run analyze

  deploy-staging:
    needs: test
    runs-on: macos-latest  # macOS for both iOS and Android
    if: github.ref == 'refs/heads/main'
    steps:
      - uses: actions/checkout@v4
      - uses: subosito/flutter-action@v2
      - run: flutter pub get
      - run: taskfile --env staging run release-staging
        env:
          APPLE_ID: $
          FASTLANE_PASSWORD: $
          PLAYSTORE_JSON: $

  deploy-production:
    needs: deploy-staging
    runs-on: macos-latest
    if: startsWith(github.ref, 'refs/tags/v')
    steps:
      - uses: actions/checkout@v4
      - uses: subosito/flutter-action@v2
      - run: flutter pub get
      - run: taskfile --env prod run release-production
        env:
          APPLE_ID: $
          FASTLANE_PASSWORD: $
          PLAYSTORE_JSON: $

Fastlane Configuration

iOS Fastfile

# ios/fastlane/Fastfile
default_platform(:ios)

platform :ios do
  desc "Push to TestFlight"
  lane :beta do
    build_app(workspace: "Runner.xcworkspace", scheme: "Runner")
    upload_to_testflight
  end

  desc "Release to App Store"
  lane :release do
    build_app(workspace: "Runner.xcworkspace", scheme: "Runner")
    upload_to_app_store
  end
end

Android Fastfile

# android/fastlane/Fastfile
default_platform(:android)

platform :android do
  desc "Internal testing"
  lane :internal do
    gradle(task: "bundleRelease")
    upload_to_play_store(track: 'internal')
  end

  desc "Deploy to Play Store"
  lane :deploy do
    gradle(task: "bundleRelease")
    upload_to_play_store
  end
end

Version & Build Numbers

Flutter uses version: 1.0.0+1 in pubspec.yaml:

Bump with:

# Manual bump
taskfile run bump-build

# Or update pubspec.yaml directly
version: 1.1.0+2

Screenshots & Metadata

Generate Screenshots

# Capture screenshots on all devices
taskfile run screenshots

Uses Fastlane’s snapshot (iOS) and screengrab (Android).

Upload Metadata

# Upload descriptions, screenshots without app
taskfile run metadata

Testing Before Release

iOS

# Install on device via TestFlight
# 1. Build and upload
TASKFILE_PLATFORM=ios taskfile --env staging run deploy-testflight

# 2. Open TestFlight app on device
# 3. Install and test

Android

# Install APK directly
flutter build apk --release
adb install build/app/outputs/flutter-apk/app-release.apk

# Or use Firebase Distribution
TASKFILE_PLATFORM=android taskfile --env staging run deploy-firebase

Troubleshooting

iOS Signing Issues

# Reset certificates
cd ios && fastlane match nuke development
cd ios && fastlane match nuke appstore
taskfile run setup-ios-cert

Android Keystore Issues

# Verify keystore
keytool -list -v -keystore android/app/keystore.jks

# Check signing config
cd android && ./gradlew signingReport

Play Store Rejection

Check:

  1. Privacy policy URL set
  2. Content rating completed
  3. App category selected
  4. Screenshots uploaded

See Also

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