Swift Android Gradle plugin

This plugin integrates Swift for Android builds using swiftly and Swift Android SDK.

Pre-requirements

This plugin requires swiftly and a Swift Android SDK installed.

1. Install swiftly and Swift 6.2+:

curl -L https://swiftlang.github.io/swiftly/swiftly-install.sh | bash
swiftly install 6.2

2. Install the Swift Android SDK:

swift sdk install <path-to-sdk.artifactbundle>

Setup

Plugin builds Swift code using SwiftPM so you should define your code inside SwiftPM modules. Root module should be located inside app/src/main/swift. See sample.

Adding plugin to gradle scripts

1. Add the following to your root build.gradle

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath 'com.readdle.android.swift:gradle:6.2'
    }
}

2. Add the following to your project build.gradle

apply plugin: 'com.readdle.android.swift'

3. Configure build types and architecture

buildTypes {
    release {
        debuggable false
        // Build Swift in release mode
        jniDebuggable false
        // all 3 architectures: arm64-v8a, armeabi-v7a, x86_64
    }
    debug {
        debuggable true
        // Build Swift in debug mode
        jniDebuggable true
        // limit architectures for faster builds
        ndk {
            abiFilters = ["arm64-v8a"]
        }
    }
}

4. Optionally you can add some extra configuration to your project build.gradle. For example:

swift {
    // Enables swift clean when ./gradlew clean invoked. Default true
    cleanEnabled false
    
    // Android API level. Default 29
    apiLevel 31
    
    // Path to swiftly executable. Default: ~/.swiftly/bin/swiftly
    swiftlyPath "/custom/path/to/swiftly"
    
    // Swift version to use with swiftly. Default: "6.2"
    swiftlyVersion "6.2"
    
    // Path to Swift Android SDK. Default: ~/Library/org.swift.swiftpm/swift-sdks/readdle-swift-6.2.1-RELEASE_android.artifactbundle
    swiftSdkPath "/custom/path/to/sdk.artifactbundle"
    
    // Custom swift flags for debug build
    debug {
        // Set custom preprocessor flags
        extraBuildFlags "-Xswiftc", "-DDEBUG"
    }
    
    // Custom swift flags for release build
    release {
        // enable symbols in release mode
        extraBuildFlags "-Xswiftc", "-g"
    }
}

Supported Architectures

• arm64-v8a (aarch64)
• armeabi-v7a (armv7)
• x86_64

Usage

In simple cases you can just run ./gradlew assembleDebug and everything will work.

Other SwiftPM to gradle mapping:

Gradle	SwiftPM
./gradlew swiftClean	swift package clean
./gradlew swiftBuildDebug	swift build
./gradlew swiftBuildRelease	swift build --configuration release

Sample

See sample app.