Generating jar file and deploying it to Jenkins Android

Question

been trying to generate Jar file of my existing Jetpack Compose project. I want to:

1. Build jar file
2. Upload that build to Jenkins Server.

I want to know, what is the correct way of doing it. I have been trying with this, but it still fails.

android {
    namespace = "com.xxx.xxx"
    compileSdk = 34

    defaultConfig {
        applicationId = "com.xxx.xxx"
        minSdk = 24
        targetSdk = 34
        versionCode = 1
        versionName = "1.0"
        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"

    }
    tasks.withType<Jar> {
        enabled = true
        manifest {
            attributes["Main-Class"] = namespace
        }
    }
}

dependencies {
    implementation(libs.androidx.core.ktx)
    implementation(libs.androidx.appcompat)
    implementation(libs.androidx.lifecycle.runtime.ktx)
        ...
}
        // Task to create a JAR file
    task createJar(type: Jar) {
        archiveBaseName = 'mycomposeapp'
        archiveVersion = '1.0.0'
        from {
            configurations.runtimeClasspath.collect { it.isDirectory() ? it : zipTree(it) }
        }
        with jar
    }

Any help here, please?

Can set up Jenkins file, but what to do in build.gradle is what making me mad :(