Marco Gomiero @marcoGomier Senior Android Developer @ Airalo Google Developer Expert for Kotlin The rollercoaster of releasing an Android, iOS, and macOS app with Kotlin Multiplatform 

@marcoGomier feedflow.dev/ FeedFlow 

@marcoGomier feedflow.dev/ FeedFlow 

@marcoGomier FeedFlow feedflow.dev/ 

@marcoGomier Distribution 

@marcoGomier Android • “Easy” for an Android Developer • Sign the app • Upload to Play Store 

@marcoGomier • Sign the app • Provisioning profiles • Upload to TestFlight • All handled by Xcode (or manually on the CI) iOS 

@marcoGomier 

@marcoGomier • Sign the app • Provisioning profiles • Upload to TestFlight • All handled by Xcode (or manually on the CI) iOS 

@marcoGomier • JAR • “Manual” distribution • App Store macOS - JVM App ❌ 

@marcoGomier No Xcode, need to go manual \o/ 

@marcoGomier macOS - “Manual” distribution • Sign the app • Notarization 

@marcoGomier https://developer.apple.com/documentation/security/notarizing_macos_software_before_distribution 

@marcoGomier 

@marcoGomier Notarization $ xcrun notarytool submit $BINARY_PATH --apple-id $APPLE_ID_NOTARIZATION --password $NOTARIZATION_PWD --team-id $APPSTORE_TEAM_ID --wait $ xcrun stapler staple $BINARY_PATH 

@marcoGomier Notarization ./gradlew notarizeDmg 

@marcoGomier macOS - “Manual” distribution • Sign the app • Notarization • Distribute the app 

@marcoGomier 

@marcoGomier macOS - App Store • Sign the app • Provisioning profiles • Upload to TestFlight 

@marcoGomier Upload to TestFlight: Transporter (or CI) https://apps.apple.com/us/app/transporter/id1450874784?mt=12 

@marcoGomier 

@marcoGomier Fixed with Compose 1.6.10 https://github.com/JetBrains/compose-multiplatform/pull/4271 

@marcoGomier compose { desktop { application { macOS { minimumSystemVersion = "12.0" } } } } } 

@marcoGomier 

@marcoGomier https://developer.apple.com/documentation/security/app_sandbox/protecting_user_data_with_app_sandbox 

@marcoGomier Native libraries on JVM • Native libraries are embedded in the dependencies jar • When needed, they are extracted and loaded 

@marcoGomier Without sandbox $TMPDIR 

@marcoGomier With sandbox 

@marcoGomier https://github.com/xerial/sqlite-jdbc 

@marcoGomier https://github.com/xerial/sqlite-jdbc/tree/master/src/main/resources/org/sqlite/native/Mac/aarch64 

@marcoGomier Packaging resources • /common • / • /- 

@marcoGomier Packaging resources 

@marcoGomier compose.desktop.application.nativeDistributions { appResourcesRootDir.set(project.layout.projectDirectory.dir("resources")) } 

@marcoGomier val isSandboxed = System.getenv("APP_SANDBOX_CONTAINER_ID") != null if (isSandboxed) { val resourcesPath = System.getProperty("compose.application.resources.dir") // sqlite-jdbc System.setProperty("org.sqlite.lib.path", resourcesPath) } 

@marcoGomier https://slack-chats.kotlinlang.org/t/16371916/hey-there-wave-i-m-trying-to-publish-my-app-on-the-mac-app-s#0be57312-7e43-4d30-add9-1cd5a0b7421b 

@marcoGomier 🎉 

@marcoGomier Crash Reporting & Logging 

@marcoGomier Firebase Crashlytics 

@marcoGomier https://github.com/touchlab/CrashKiOS 

@marcoGomier 

@marcoGomier Firebase Crashlytics Sentry Java SDK 

@marcoGomier https://github.com/touchlab/Kermit 

@marcoGomier val logger = Logger( config = StaticConfig( logWriterList = listOf( platformLogWriter(), crashReportingLogWriter(), ), ), tag = "FeedFlow", ) 

@marcoGomier val logger = Logger( config = StaticConfig( logWriterList = listOf( platformLogWriter(), crashReportingLogWriter(), ), ), tag = "FeedFlow", ) 

@marcoGomier val logger = Logger( config = StaticConfig( logWriterList = listOf( platformLogWriter(), crashReportingLogWriter(), ), ), tag = "FeedFlow", ) 

@marcoGomier internal expect fun crashReportingLogWriter(): LogWriter actual fun crashReportingLogWriter(): LogWriter = CrashlyticsLogWriter() actual fun crashReportingLogWriter(): LogWriter = SentryLogWriter() 

@marcoGomier class SentryLogWriter : LogWriter() { override fun isLoggable(tag: String, severity: Severity): Boolean { // .. } override fun log( severity: Severity, message: String, tag: String, throwable: Throwable? ) { // .. } } 

@marcoGomier I18n 

@marcoGomier https://github.com/adrielcafe/lyricist 

@marcoGomier val feedFlowStrings: Map = mapOf( Locales.It to ItFeedFlowStrings, Locales.En to EnFeedFlowStrings, Locales.De to DeFeedFlowStrings, ) 

@marcoGomier val feedFlowStrings: Map = mapOf( Locales.It to ItFeedFlowStrings, Locales.En to EnFeedFlowStrings, Locales.De to DeFeedFlowStrings, ) FeedFlowTheme { val lyricist = rememberFeedFlowStrings() ProvideFeedFlowStrings(lyricist) { MyAppEntrypoint() } } 

@marcoGomier val feedFlowStrings: Map = mapOf( Locales.It to ItFeedFlowStrings, Locales.En to EnFeedFlowStrings, Locales.De to DeFeedFlowStrings, ) FeedFlowTheme { val lyricist = rememberFeedFlowStrings() ProvideFeedFlowStrings(lyricist) { MyAppEntrypoint() } } Text(text = LocalFeedFlowStrings.current.feedUrl) 

@marcoGomier val feedFlowStrings: Map = mapOf( Locales.It to ItFeedFlowStrings, Locales.En to EnFeedFlowStrings, Locales.De to DeFeedFlowStrings, ) 

@marcoGomier val feedFlowStrings: Map = mapOf( Locales.It to ItFeedFlowStrings, Locales.En to EnFeedFlowStrings, Locales.De to DeFeedFlowStrings, ) func startKoin() { let langCode = Locale.current.language.languageCode?.identifier ?? "en" let koinApplication = KoinIOSKt.doInitKoinIos(languageCode: langCode) _feedFlowStrings = KotlinDependencies.shared.getFeedFlowStrings() } private var _feedFlowStrings: FeedFlowStrings? var feedFlowStrings: FeedFlowStrings { return _feedFlowStrings! } 

@marcoGomier val feedFlowStrings: Map = mapOf( Locales.It to ItFeedFlowStrings, Locales.En to EnFeedFlowStrings, Locales.De to DeFeedFlowStrings, ) func startKoin() { let langCode = Locale.current.language.languageCode?.identifier ?? "en" let koinApplication = KoinIOSKt.doInitKoinIos(languageCode: langCode) _feedFlowStrings = KotlinDependencies.shared.getFeedFlowStrings() } private var _feedFlowStrings: FeedFlowStrings? var feedFlowStrings: FeedFlowStrings { return _feedFlowStrings! } 

@marcoGomier val feedFlowStrings: Map = mapOf( Locales.It to ItFeedFlowStrings, Locales.En to EnFeedFlowStrings, Locales.De to DeFeedFlowStrings, ) func startKoin() { let langCode = Locale.current.language.languageCode?.identifier ?? "en" let koinApplication = KoinIOSKt.doInitKoinIos(languageCode: langCode) _feedFlowStrings = KotlinDependencies.shared.getFeedFlowStrings() single { feedFlowStrings[languageCode] ?: EnFeedFlowStrings } 

@marcoGomier val feedFlowStrings: Map = mapOf( Locales.It to ItFeedFlowStrings, Locales.En to EnFeedFlowStrings, Locales.De to DeFeedFlowStrings, ) func startKoin() { let langCode = Locale.current.language.languageCode?.identifier ?? "en" let koinApplication = KoinIOSKt.doInitKoinIos(languageCode: langCode) _feedFlowStrings = KotlinDependencies.shared.getFeedFlowStrings() } private var _feedFlowStrings: FeedFlowStrings? var feedFlowStrings: FeedFlowStrings { return _feedFlowStrings! } 

@marcoGomier val feedFlowStrings: Map = mapOf( Locales.It to ItFeedFlowStrings, Locales.En to EnFeedFlowStrings, Locales.De to DeFeedFlowStrings, ) func startKoin() { let langCode = Locale.current.language.languageCode?.identifier ?? "en" let koinApplication = KoinIOSKt.doInitKoinIos(languageCode: langCode) _feedFlowStrings = KotlinDependencies.shared.getFeedFlowStrings() Text(feedFlowStrings.searchHintTitle) 

@marcoGomier Conclusions 

@marcoGomier Conclusions • Start from things you already know • Go incrementally • Exploring other planets enriches your vision 

@marcoGomier More reading https://www.marcogomiero.com/posts/2024/kmp-app-ci 

@marcoGomier Thank you! > Twitter: @marcoGomier > Github: prof18 > Website: marcogomiero.com > Mastodon: androiddev.social/@marcogom Marco Gomiero Senior Android Developer @ Airalo Google Developer Expert for Kotlin 

Bibliography / Useful Links • https: / / feedflow.dev/ • https: / / developer.apple.com/documentation/security/notarizing_macos_software_before_distribution • https: / / help.apple.com/itc/transporteruserguide/en.lproj/static.html#apd70774093eddb4 • https: / / developer.apple.com/documentation/security/app_sandbox/protecting_user_data_with_app_sandbox • https: / / github.com/JetBrains/compose-multiplatform/blob/master/tutorials/Native_distributions_and_local_execution/README.md#adding-files-to- packaged-application • https: / / slack-chats.kotlinlang.org/t/16371916/hey-there-wave-i-m-trying-to-publish-my-app-on-the-mac-app-s#0be57312-7e43-4d30- add9-1cd5a0b7421b • https: / / firebase.google.com/products/crashlytics • https: / / docs.sentry.io/platforms/java/ • https: / / github.com/touchlab/CrashKiOS • https: / / github.com/touchlab/Kermit • https: / / github.com/adrielcafe/lyricist • https: / / www.jetbrains.com/help/kotlin-multiplatform-dev/compose-images-resources.html#strings • https: / / www.marcogomiero.com/posts/2024/kmp-ci-android • https: / / www.marcogomiero.com/posts/2024/kmp-ci-ios • https: / / www.marcogomiero.com/posts/2024/kmp-ci-macos-github-releases • https: / / www.marcogomiero.com/posts/2024/kmp-ci-macos-appstore • https: / / www.marcogomiero.com/posts/2024/compose-macos-app-store/