Exclude bytecode from skiko-awt-runtime-*.jar files (#608)

* Exclude bytecode from skiko-awt-runtime-*.jar files

Previously, `skiko-awt.jar` and all of `skiko-awt-runtime-*.jar` files
contained the same bytecode. However, this led to duplication
of bytecode in Compose projects:
* `skiko-awt.jar` is a necessary API dependency of Compose/Desktop, which means
it is a runtime dependency as well;
* `skiko-awt-runtime-*.jar` is a necessary RUNTIME dependency of any Compose/Desktop project.

Thus, both `skiko-awt.jar` and `skiko-awt-runtime-*.jar` ended up in a runtime classpath of
any Compose/Desktop project, so the same classes were present in the runtime classpath twice.
This increased a final application image by approximately 1.1 Mb. Also, it led to
excessive ProGuard warnings, e.g. https://github.com/JetBrains/compose-jb/issues/2393

This change excludes bytecode from `skiko-awt-runtime-*.jar` artifacts, and adds
Maven dependency `skiko-awt-runtime-*.jar` -> `skiko-awt.jar`, so
many existing Maven/Gradle usages of `skiko-awt-runtime-*.jar` will continue to work.

skiko/build.gradle.kts

@@ -25,7 +25,7 @@ val skiko = SkikoProperties(rootProject)
 val buildType = skiko.buildType
 
 allprojects {
-    group = "org.jetbrains.skiko"
+    group = SkikoArtifacts.groupId
     version = skiko.deployVersion
 }
 
@@ -621,7 +621,8 @@ val skikoAwtJar by project.tasks.registering(Jar::class) {
     from(kotlin.jvm("awt").compilations["main"].output.allOutputs)
 }
 val skikoAwtRuntimeJar = createSkikoJvmJarTask(hostOs, hostArch, skikoAwtJar)
-val skikoRuntimeDirForTests = skikoRuntimeDirForTestsTask(hostOs, hostArch, skikoAwtRuntimeJar)
+val skikoRuntimeDirForTests = skikoRuntimeDirForTestsTask(hostOs, hostArch, skikoAwtJar, skikoAwtRuntimeJar)
+val skikoJarForTests = skikoJarForTestsTask(skikoRuntimeDirForTests)
 
 if (supportAndroid) {
     val os = OS.Android
@@ -1077,34 +1078,40 @@ fun skikoJvmRuntimeJarTask(
     awtJar: TaskProvider<Jar>,
     nativeFiles: List<Provider<File>>
 ) = project.registerSkikoTask<Jar>("skikoJvmRuntimeJar", targetOs, targetArch) {
+    dependsOn(awtJar)
     val target = targetId(targetOs, targetArch)
     archiveBaseName.set("skiko-$target")
-    from(awtJar.map { zipTree(it.archiveFile) })
     nativeFiles.forEach {  provider -> from(provider) }
 }
 
 fun skikoRuntimeDirForTestsTask(
     targetOs: OS,
     targetArch: Arch,
+    skikoJvmJar: Provider<Jar>,
     skikoJvmRuntimeJar: Provider<Jar>
 ) = project.registerSkikoTask<Copy>("skikoRuntimeDirForTests", targetOs, targetArch) {
-    dependsOn(skikoJvmRuntimeJar)
-    from(zipTree(skikoJvmRuntimeJar.flatMap { it.archiveFile })) {
-        include("*.so")
-        include("*.dylib")
-        include("*.dll")
-        include("icudtl.dat")
-    }
+    dependsOn(skikoJvmJar, skikoJvmRuntimeJar)
+    from(zipTree(skikoJvmJar.flatMap { it.archiveFile }))
+    from(zipTree(skikoJvmRuntimeJar.flatMap { it.archiveFile }))
+    duplicatesStrategy = DuplicatesStrategy.WARN
     destinationDir = project.buildDir.resolve("skiko-runtime-for-tests")
 }
 
+fun skikoJarForTestsTask(
+    runtimeDirForTestsTask: Provider<Copy>
+) = project.registerSkikoTask<Jar>("skikoJvmJarForTests") {
+    dependsOn(runtimeDirForTestsTask)
+    from(runtimeDirForTestsTask.map { it.destinationDir })
+    archiveFileName.set("skiko-runtime-for-tests.jar")
+}
+
 tasks.withType<Test>().configureEach {
     dependsOn(skikoRuntimeDirForTests)
-    dependsOn(skikoAwtRuntimeJar)
+    dependsOn(skikoJarForTests)
     options {
         val dir = skikoRuntimeDirForTests.map { it.destinationDir }.get()
         systemProperty("skiko.library.path", dir)
-        val jar = skikoAwtRuntimeJar.get().outputs.files.files.single { it.name.endsWith(".jar")}
+        val jar = skikoJarForTests.get().outputs.files.files.single { it.name.endsWith(".jar")}
         systemProperty("skiko.jar.path", jar.absolutePath)
 
         systemProperty("skiko.test.screenshots.dir", File(project.projectDir, "src/jvmTest/screenshots").absolutePath)
@@ -1187,7 +1194,7 @@ publishing {
         }
         configureEach {
             this as MavenPublication
-            groupId = "org.jetbrains.skiko"
+            groupId = SkikoArtifacts.groupId
 
             // Necessary for publishing to Maven Central
             artifact(emptyJavadocJar)
@@ -1226,15 +1233,15 @@ publishing {
                 artifactId = SkikoArtifacts.jvmRuntimeArtifactIdFor(os, arch)
                 afterEvaluate {
                     artifact(entry.value.map { it.archiveFile.get() })
-                    var jvmSourcesArtifact: Any? = null
-                    // todo: use correct sources jar for each jvm source set
-                    kotlin.jvm(if (os == OS.Android) "android" else "awt").mavenPublication {
-                        jvmSourcesArtifact = artifacts.find { it.classifier == "sources" }
+                    artifact(emptySourcesJar)
                 }
-                    if (jvmSourcesArtifact == null) {
-                        error("Could not find sources jar artifact for JVM target")
-                    } else {
-                        artifact(jvmSourcesArtifact)
+                pom.withXml {
+                    asNode().appendNode("dependencies")
+                        .appendNode("dependency").apply {
+                            appendNode("groupId", SkikoArtifacts.groupId)
+                            appendNode("artifactId", SkikoArtifacts.jvmArtifactId)
+                            appendNode("version", skiko.deployVersion)
+                            appendNode("scope", "compile")
                         }
                 }
             }

skiko/buildSrc/src/main/kotlin/properties.kt

@@ -177,6 +177,7 @@ class SkikoProperties(private val myProject: Project) {
 }
 
 object SkikoArtifacts {
+    val groupId = "org.jetbrains.skiko"
     // names are also used in samples, e.g. samples/SkijaInjectSample/build.gradle
     val commonArtifactId = "skiko"
     val jvmArtifactId = "skiko-awt"