DevOps & CI/CDHard50 XP5 min read
How do you use Fastlane to automate Flutter deployments?
TL;DR: Fastlane automates app store deployments. Use the flutter action in a Fastfile to build the app bundle, then supply to upload to Google Play or deliver to upload to App Store Connect. Combine with GitHub Actions for full CI/CD.
Full Answer
Fastlane is a Ruby-based automation tool that handles screenshots, code signing, beta distribution (TestFlight, Firebase App Distribution), and app store uploads.
Key Fastlane Actions for Flutter
- ▸supply: Upload AAB to Google Play (alpha, beta, or production tracks)
- ▸deliver: Upload IPA to App Store Connect
- ▸firebase_app_distribution: Beta distribution via Firebase
- ▸match: iOS code signing certificate management
- ▸increment_build_number: Auto-increment version codes
Code Examples
rubyandroid/fastlane/Fastfile
Output
# fastlane deploy # → builds prod AAB → uploads to Google Play production
Common Mistakes
- ✗Storing the google-play-key.json in the repository — use environment variables or CI secrets
- ✗Not incrementing the version code before upload — Play Store rejects duplicate version codes
Interview Tip
💡
Show the full deploy pipeline: test → build → sign → upload. Fastlane is the industry standard for mobile CI/CD. Knowing it puts you ahead of candidates who only know manual uploads.
#fastlane#deployment#automation#app-store#google-play