Configure compilations, multiplatform distribution and code coverage

Author: petertrr

build.gradle.kts

@@ -1,8 +1,12 @@
+import org.jetbrains.kotlin.gradle.targets.jvm.tasks.KotlinJvmTest
+
 plugins {
     kotlin("multiplatform") version "1.4.30"
+    jacoco
+    id("maven-publish")
 }
 
-group = "com.github.petertrr"
+group = "io.github.petertrr"
 version = "0.0.1-SNAPSHOT"
 
 repositories {
@@ -12,10 +16,45 @@ repositories {
 kotlin {
     jvm()
     sourceSets {
-        val commonMain by getting {
+        val commonTest by getting {
             dependencies {
-
+                implementation(kotlin("test-common"))
+                implementation(kotlin("test-annotations-common"))
             }
         }
+        // platform-specific dependencies are needed to use actual test runners
+        val jvmTest by getting {
+            dependencies {
+                implementation(kotlin("test-junit5"))
+            }
+        }
+    }
+}
+
+publishing {
+    repositories {
+        mavenLocal()
+    }
+}
+
+// configure Jacoco-based code coverage reports for JVM tests executions
+jacoco {
+    toolVersion = "0.8.6"
+}
+val jvmTestTask by tasks.named<KotlinJvmTest>("jvmTest") {
+    configure<JacocoTaskExtension> {
+        // this is needed to generate jacoco/jvmTest.exec
+        isEnabled = true
+    }
+}
+val jacocoTestReportTask by tasks.register<JacocoReport>("jacocoTestReport") {
+    executionData(jvmTestTask.extensions.getByType(JacocoTaskExtension::class.java).destinationFile)
+    additionalSourceDirs(kotlin.sourceSets["commonMain"].kotlin.sourceDirectories)
+    classDirectories.setFrom(file("$buildDir/classes/kotlin/jvm"))
+    reports {
+        xml.isEnabled = true
+        html.isEnabled = true
     }
 }
+jvmTestTask.finalizedBy(jacocoTestReportTask)
+jacocoTestReportTask.dependsOn(jvmTestTask)