4e939c4570
lightning-kmp-app moves 6745d88 -> bbba08b, four commits: 57353cf Minor updates 9f3cd72 Build lightning-kmp from the experimental submodule via a composite build f22c30a Follow the submodule chain onto Gradle 9.7.1 bbba08b Declare the ios targets only on a mac, so the IDE can import the project 9f3cd72 is the substantive one. lightning-kmp no longer comes from maven central: the submodule now carries its own experimental/lightning-kmp submodule on branch `threshold` -- the branch with the FROST/prefractal signers -- and substitutes fr.acinq.lightning:lightning-kmp-core for that build's project. That build includes bitcoin-kmp, which includes secp256k1-kmp, which compiles the C library from a secp256k1-zkp fork. So this repo's build tree is now four levels deep and compiles native code. Cloning therefore needs `git submodule update --init --recursive`, and because each included build resolves the android SDK from its own local.properties rather than inheriting the root's, the three new nested builds each need a (gitignored) local.properties with sdk.dir. 57353cf changed two signatures that MantraApplication implements -- LightningApplication gained getApplicationContext(), and BusinessManager.initialize now takes the application rather than a Context. Neither needed a source change: MantraApplication extends android.app.Application, which already supplies getApplicationContext(), and it was already passing `this`, which satisfies the narrowed parameter type. The rest of this commit is what the update forces on the outer build. gradle-wrapper.properties, 9.3.1 -> 9.7.1: f22c30a moved every build in the chain onto 9.7.1. An included build does not use its own wrapper -- the root build's gradle version runs the whole tree -- so this repo has to follow for the chain to build at all. gradle.properties, configuration cache off: secp256k1-kmp's `:jni:generateHeaders` and `:native:buildSecp256k1<target>` both hold gradle script object references and cannot be serialized. The configuration cache covers a whole build tree and has no per-build opt-out, so an included build's incompatibility is this build's problem. The comment records how to undo this once those tasks are fixed upstream. composeApp/build.gradle.kts, ios targets gated on the host: secp256k1-kmp declares a libsecp256k1 cinterop, which makes gradle switch off klib cross compilation for apple targets. On linux nothing in the tree then offers an ios variant of fr.acinq.phoenix:lightning-kmp-app, and the ios compilations failed with "No matching variant of project ':lightning-kmp-app:library'" -- not a warning, a build failure. The gate covers the target declarations, the iosMain dependencies (the source set only exists when the targets do) and the kspIos* configurations (likewise). This mirrors bbba08b, which applied the same gate inside the submodule for the same reason. secp256k1-frost-kmp d3b294d applies that gate there too. Substitution rules apply across a whole build tree, so that project's own lightning-kmp-core coordinate started resolving to the source project without it asking, and every apple source set stopped resolving. The android build masked it -- ios compilations are not in its task graph -- but kmpPartiallyResolvedDependenciesChecker reported it and compileAppleMainKotlinMetadata failed outright, which would have broken IDE import. Note that `:composeApp:compileCommonMainKotlinMetadata` no longer exists on a linux host. With ios gated off, androidTarget is the only declared target (jvm() is still commented out), and KMP does not generate a commonMain metadata compilation for a single-target project. `:composeApp:compileDebugKotlinAndroid` is the check now; it passes clean, with none of the resolution errors above. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This is a Kotlin Multiplatform project targeting Android, iOS, Desktop (JVM).
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/composeApp is for code that will be shared across your Compose Multiplatform applications. It contains several subfolders:
- commonMain is for code that’s common for all targets.
- Other folders are for Kotlin code that will be compiled for only the platform indicated in the folder name. For example, if you want to use Apple’s CoreCrypto for the iOS part of your Kotlin app, the iosMain folder would be the right place for such calls. Similarly, if you want to edit the Desktop (JVM) specific part, the jvmMain folder is the appropriate location.
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/iosApp contains iOS applications. Even if you’re sharing your UI with Compose Multiplatform, you need this entry point for your iOS app. This is also where you should add SwiftUI code for your project.
Build and Run Android Application
To build and run the development version of the Android app, use the run configuration from the run widget in your IDE’s toolbar or build it directly from the terminal:
- on macOS/Linux
./gradlew :composeApp:assembleDebug - on Windows
.\gradlew.bat :composeApp:assembleDebug
Build and Run Desktop (JVM) Application
To build and run the development version of the desktop app, use the run configuration from the run widget in your IDE’s toolbar or run it directly from the terminal:
- on macOS/Linux
./gradlew :composeApp:run - on Windows
.\gradlew.bat :composeApp:run
Build and Run iOS Application
To build and run the development version of the iOS app, use the run configuration from the run widget in your IDE’s toolbar or open the /iosApp directory in Xcode and run it from there.
Learn more about Kotlin Multiplatform…