Github actions mobile release

GitHub Actions for Mobile Release

Instructions

GitHub Actions is the default CI for many mobile teams because the workflows live next to the code. This skill gives you a production-ready setup for iOS + Android with proper secret handling, caching, and tag-triggered releases.

1. Workflow Layout

.github/workflows/
  pr.yml                # lint + test on every PR
  main.yml              # internal/TestFlight on every merge to main
  release.yml           # production release on v*.*.* tags

Keep each file single-purpose; avoid one mega-workflow with 20 jobs.

2. PR Workflow

name: PR
on:
  pull_request:
    branches: [main]

concurrency:
  group: pr-${{ github.event.pull_request.number }}
  cancel-in-progress: true

jobs:
  lint-test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-java@v4
        with: { distribution: temurin, java-version: '17' }
      - uses: ruby/setup-ruby@v1
        with: { bundler-cache: true }
      - name: Gradle lint + test
        run: ./gradlew :app:lintRelease :app:testReleaseUnitTest

3. iOS Release Workflow

name: Release iOS
on:
  push:
    tags: ['v*.*.*']

jobs:
  ios:
    runs-on: macos-14
    environment: production     # requires manual approval
    timeout-minutes: 60
    steps:
      - uses: actions/checkout@v4
      - uses: ruby/setup-ruby@v1
        with: { bundler-cache: true, working-directory: ios }
      - name: Select Xcode 15.4
        run: sudo xcode-select -s /Applications/Xcode_15.4.app
      - name: Cache CocoaPods
        uses: actions/cache@v4
        with:
          path: ios/Pods
          key: pods-${{ hashFiles('ios/Podfile.lock') }}
      - run: cd ios && pod install --repo-update
      - name: Fastlane release
        working-directory: ios
        env:
          APP_STORE_CONNECT_KEY_ID: ${{ secrets.APP_STORE_CONNECT_KEY_ID }}
          APP_STORE_CONNECT_ISSUER_ID: ${{ secrets.APP_STORE_CONNECT_ISSUER_ID }}
          APP_STORE_CONNECT_KEY_CONTENT: ${{ secrets.APP_STORE_CONNECT_KEY_CONTENT }}
          MATCH_PASSWORD: ${{ secrets.MATCH_PASSWORD }}
          MATCH_GIT_BASIC_AUTHORIZATION: ${{ secrets.MATCH_GIT_BASIC_AUTHORIZATION }}
          VERSION_NAME: ${{ github.ref_name }}
          VERSION_CODE: ${{ github.run_number }}
        run: |
          bundle exec fastlane beta
          bundle exec fastlane release
      - uses: actions/upload-artifact@v4
        with:
          name: ios-ipa
          path: ios/build/ios/ipa/*.ipa
          retention-days: 30

4. Android Release Workflow

name: Release Android
on:
  push:
    tags: ['v*.*.*']

jobs:
  android:
    runs-on: ubuntu-latest
    environment: production
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-java@v4
        with: { distribution: temurin, java-version: '17' }
      - uses: ruby/setup-ruby@v1
        with: { bundler-cache: true, working-directory: android }
      - uses: gradle/actions/setup-gradle@v3
      - name: Decode keystore
        run: |
          echo "${{ secrets.ANDROID_KEYSTORE_BASE64 }}" | base64 -d \
            > android/upload-keystore.jks
          cat > android/key.properties <<EOF
          storeFile=../upload-keystore.jks
          storePassword=${{ secrets.KEYSTORE_PASSWORD }}
          keyAlias=${{ secrets.KEY_ALIAS }}
          keyPassword=${{ secrets.KEY_PASSWORD }}
          EOF
      - name: Fastlane internal
        working-directory: android
        env:
          PLAY_SERVICE_ACCOUNT_JSON: ${{ secrets.PLAY_SERVICE_ACCOUNT_JSON }}
          VERSION_NAME: ${{ github.ref_name }}
        run: bundle exec fastlane internal
      - uses: actions/upload-artifact@v4
        with:
          name: android-aab
          path: android/app/build/outputs/bundle/release/*.aab

5. Environment Protection

Settings → Environments → production:

• Required reviewers: 1 release manager.
• Wait timer: 0 minutes (or 15 for extra caution).
• Deployment branches: only main and release/* tags.

This gates the release workflow behind a manual click.

6. Secret Naming Convention

• Platform prefix: ANDROID_*, IOS_*, PLAY_*, APP_STORE_CONNECT_*.
• Encoding suffix: *_BASE64 when the value is binary-encoded.
• Never: generic names like API_KEY or PASSWORD.

7. Caching Strategy

Cache	Key
Ruby gems	hashFiles('**/Gemfile.lock')
CocoaPods	hashFiles('**/Podfile.lock')
Gradle	hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') via gradle/actions/setup-gradle
Pub	hashFiles('**/pubspec.lock')
node_modules	hashFiles('**/package-lock.json', '**/yarn.lock')

Prefer the official setup actions' built-in caching over hand-rolled actions/cache where available.

8. Artefact Retention

Keep signed AABs and IPAs for 30–90 days. Enough time to re-upload if a release is pulled, short enough to control storage costs. Never store secrets in artefacts.

9. Cost Management

• macOS runners are ~10× Linux. Run iOS on macOS only; run Android on Linux.
• Use path filters so docs-only PRs don't spin up mobile CI.
• Cancel in-progress runs on new pushes (concurrency.cancel-in-progress).

10. Release-Please Integration

# .github/workflows/release-please.yml
on: { push: { branches: [main] } }
jobs:
  release:
    runs-on: ubuntu-latest
    steps:
      - uses: googleapis/release-please-action@v4
        with:
          release-type: simple

When the PR merges, a tag is created and the release.yml workflow fires. Zero manual steps.

11. Anti-Patterns

• Checking signing secrets into .env files.
• Triggering release builds on push to any branch.
• Running iOS + Android in one job (serialising them wastes macOS time).
• Storing .p8 or .jks files in the repo, even encrypted with git-crypt.

12. Checklist

• Three workflows: PR, main, release — single-purpose each.
• production environment requires manual approval.
• Secrets named with platform prefix and encoding suffix.
• macOS runners pinned to a specific Xcode via xcode-select.
• Caches hashed off lockfiles.
• Fastlane lanes run unchanged; CI YAML only sets env vars.
• Release-please (or equivalent) closes the loop from merge → tag → release.