secp256k1-kmp/build.gradle.kts

plugins {
    kotlin("multiplatform") version "1.4-M2-mt"
}
group = "fr.acinq.phoenix"
version = "1.0-1.4-M2"

repositories {
    jcenter()
    maven(url = "https://dl.bintray.com/kotlin/kotlin-eap")
    maven("https://dl.bintray.com/kotlin/kotlin-eap")
}

val currentOs = org.gradle.internal.os.OperatingSystem.current()

kotlin {
    explicitApi()

    val commonMain by sourceSets.getting {
        dependencies {
            implementation(kotlin("stdlib-common"))
        }
    }
    val commonTest by sourceSets.getting {
        dependencies {
            implementation(kotlin("test-common"))
            implementation(kotlin("test-annotations-common"))
        }
    }

    jvm {
        compilations.all {
            kotlinOptions.jvmTarget = "1.8"
        }
        (tasks[compilations["main"].processResourcesTaskName] as ProcessResources).apply{
            dependsOn("copyJni")
            from(buildDir.resolve("jniResources"))
        }
        compilations["main"].dependencies {
            implementation(kotlin("stdlib-jdk8"))
        }
        compilations["test"].dependencies {
            implementation(kotlin("test-junit"))
        }
    }

    fun org.jetbrains.kotlin.gradle.plugin.mpp.KotlinNativeTarget.secp256k1CInterop() {
        compilations["main"].cinterops {
            val libsecp256k1 by creating {
                includeDirs.headerFilterOnly(project.file("native/secp256k1/include/"))
//                includeDirs("/usr/local/lib")
                tasks[interopProcessingTaskName].dependsOn("buildSecp256k1Ios")
            }
        }
    }

    val nativeMain by sourceSets.creating { dependsOn(commonMain) }

    linuxX64 {
        secp256k1CInterop()
        // https://youtrack.jetbrains.com/issue/KT-39396
        compilations["main"].kotlinOptions.freeCompilerArgs += listOf("-include-binary", "$rootDir/native/build/linux/libsecp256k1.a")
        compilations["main"].defaultSourceSet.dependsOn(nativeMain)
    }

    ios {
        secp256k1CInterop()
        // https://youtrack.jetbrains.com/issue/KT-39396
        compilations["main"].kotlinOptions.freeCompilerArgs += listOf("-include-binary", "$rootDir/native/build/ios/libsecp256k1.a")
        compilations["main"].defaultSourceSet.dependsOn(nativeMain)
    }

    sourceSets.all {
        languageSettings.useExperimentalAnnotation("kotlin.RequiresOptIn")
    }

}

val buildSecp256k1 by tasks.creating { group = "build" }
fun creatingBuildSecp256k1(target: String, cross: String? = null, env: String = "", configuration: Task.() -> Unit = {}) = tasks.creating(Exec::class) {
    group = "build"
    buildSecp256k1.dependsOn(this)

    inputs.files(projectDir.resolve("native/build.sh"))
    outputs.dir(projectDir.resolve("native/build/$target"))

    workingDir = projectDir.resolve("native")
    environment("TARGET", target)
    if (cross == null) commandLine("./build.sh")
    else commandLine("./dockcross-$cross", "bash", "-c", "TARGET=$target ./build.sh")

    configuration()
}

val buildSecp256k1Darwin by creatingBuildSecp256k1("darwin")
val buildSecp256k1Linux by creatingBuildSecp256k1("linux", cross = if (currentOs.isMacOsX) "linux-x64" else null)
val buildSecp256k1Mingw by creatingBuildSecp256k1("mingw", cross = "windows-x64", env = "CONF_OPTS=--host=x86_64-w64-mingw32")

val buildSecp256k1Ios by tasks.creating(Exec::class) {
    group = "build"
    buildSecp256k1.dependsOn(this)

    inputs.files(projectDir.resolve("native/build-ios.sh"))
    outputs.dir(projectDir.resolve("native/build/ios"))

    workingDir = projectDir.resolve("native")
    commandLine("./build-ios.sh")
}

val copyJni by tasks.creating(Sync::class) {
    dependsOn(buildSecp256k1)
    from(projectDir.resolve("native/build/linux/libsecp256k1-jni.so")) { rename { "libsecp256k1-jni-linux-x86_64.so" } }
    from(projectDir.resolve("native/build/darwin/libsecp256k1-jni.dylib")) { rename { "libsecp256k1-jni-darwin-x86_64.dylib" } }
    from(projectDir.resolve("native/build/mingw/secp256k1-jni.dll")) { rename { "secp256k1-jni-mingw-x86_64.dll" } }
    into(buildDir.resolve("jniResources/fr/acinq/secp256k1/native"))
}