Using Fastlane in Flutter and CI Prerequisites: Understand what Fastlane is and how it works Project builds correctly following these docs Android app setup in Google Play Console iOS app setup in AppStore Connect Flutter is installed and your project is created Steps Open your Flutter project Run: cd ios Run: fastlane init and follow the prompts Replace the Fastfile contents with this:

!/bin/bash

echo "App Release Automator by @rodydavis" action="$1" red=tput setaf 1 green=tput setaf 2 reset=tput sgr0 if [ ${action} = "build" ]; then echo "${green}Generating built files.. ${reset}" flutter packages pub run build_runner clean flutter packages pub run build_runner build --delete-conflicting-outputs pub global activate pubspec_version git commit -a -m "Build $(pubver bump patch)" echo "${green}Building Project...${reset}" find . -name "-e" -type f -delete flutter format . flutter clean echo "${green}Project Size: $(find . -name ".dart" | xargs cat | wc -c)${reset}" echo "${green}Building APK...${reset}" flutter build apk echo "${green}Builing IPA..${reset}" cd ./ios && pod install && pod repo update && cd .. flutter build ios git commit -a -m "Project Rebuilt" elif [ ${action} = "beta" ]; then echo "${green}Generating built files..${reset}" flutter packages pub run build_runner clean flutter packages pub run build_runner build --delete-conflicting-outputs pub global activate pubspec_version git commit -a -m "Beta $(pubver bump patch)" echo "${green}Building Project...${reset}" find . -name "-e" -type f -delete flutter format . flutter clean echo "${green}Project Size: $(find . -name ".dart" | xargs cat | wc -c)${reset}" echo "${green}Building APK...${reset}" flutter build apk echo "${green}Sending Android to Beta...${reset}" cd ./android && fastlane beta && cd .. echo "${green}Builing IPA..${reset}" flutter build ios echo "${green}Sending iOS to Beta..${reset}" cd ./ios && fastlane beta && cd .. git commit -a -m "Sent to Beta" elif [ ${action} = "release" ]; then echo "${green}Generating built files..${reset}" flutter packages pub run build_runner clean flutter packages pub run build_runner build --delete-conflicting-outputs pub global activate pubspec_version git commit -a -m "Production $(pubver bump minor)" echo "${green}Building Project...${reset}" find . -name "-e" -type f -delete flutter format . flutter clean echo "${green}Project Size: $(find . -name ".dart" | xargs cat | wc -c)${reset}" echo "${green}Building APK...${reset}" flutter build apk echo "${green}Sending Android to Production...${reset}" cd ./android && fastlane release && cd .. echo "${green}Builing IPA..${reset}" flutter build ios echo "${green}Sending iOS to Production...${reset}" cd ./ios && fastlane release && cd .. git commit -a -m "Sent to Production" fi echo "${green}Successfully completed${reset}" Run: cd .. && cd android Run: fastlane init and follow the prompts Replace the Fastfile contents with this:

Uncomment the line if you want fastlane to automatically update itself

update_fastlane

default_platform(:android) platform :android do desc "Prepare and archive app" lane :prepare do |options|

bundle_install

Dir.chdir "../.." do sh("flutter", "packages", "get") sh("flutter", "clean") sh("flutter", "build", "appbundle", "--release") end end desc "Push a new beta build to Google Play" lane :beta do prepare(release: false) upload_to_play_store( track: 'beta', aab: "../build/app/outputs/bundle/release/app.aab" ) add_git_tag( grouping: "fastlane-builds", prefix: "v", build_number: android_get_version_code ) push_to_git_remote end desc "Push a new release build to the Google Play" lane :release do prepare(release: true) upload_to_play_store( track: 'production', aab: "../build/app/outputs/bundle/release/app.aab" ) add_git_tag( grouping: "release", prefix: "v", build_number: android_get_version_name ) push_to_git_remote end end Run: fastlane add_plugin versioning_android and enter your password if needed Run: cd .. Now you are ready to launch your app to beta! For ios run: cd ios && fastlane beta For android run: cd android && fastlane beta Stay tuned for an article soon where we use these fastlane sub folders for automating the releases on Github Actions CI