Provide a DSL for publication settings (#1869)

* Provide a DSL for publication settings
* Rename DSL method publication -> mavenPublication
* Fix gradle task input/output validation

 #KT-26771 fixed.

libraries/tools/kotlin-gradle-plugin-api/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KotlinTarget.kt

@@ -5,12 +5,15 @@
 
 package org.jetbrains.kotlin.gradle.plugin
 
+import groovy.lang.Closure
+import org.gradle.api.Action
 import org.gradle.api.Named
 import org.gradle.api.NamedDomainObjectContainer
 import org.gradle.api.Project
 import org.gradle.api.attributes.HasAttributes
 import org.gradle.api.component.SoftwareComponent
 import org.gradle.api.internal.component.UsageContext
+import org.gradle.api.publish.maven.MavenPublication
 
 interface KotlinTargetComponent : SoftwareComponent {
     val target: KotlinTarget
@@ -39,5 +42,8 @@ interface KotlinTarget: Named, HasAttributes {
 
     fun createUsageContexts(): Set<UsageContext>
 
+    fun mavenPublication(action: Closure<Unit>)
+    fun mavenPublication(action: Action<MavenPublication>)
+
     override fun getName(): String = targetName
 }

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/NewMultiplatformIT.kt

@@ -58,6 +58,14 @@ class NewMultiplatformIT : BaseGradleIT() {
                     Assert.assertTrue("$it should exist", groupDir.resolve(it).exists())
                 }
 
+                listOf(jvmJarName, jsJarName, metadataJarName, wasmKlibName, nativeKlibName).forEach {
+                    val pom = groupDir.resolve(it.replaceAfterLast('.', "pom"))
+                    Assert.assertTrue(
+                        "$pom should contain a name section.",
+                        pom.readText().contains("<name>Sample MPP library</name>")
+                    )
+                }
+
                 val jvmJarEntries = ZipFile(groupDir.resolve(jvmJarName)).entries().asSequence().map { it.name }.toSet()
                 Assert.assertTrue("com/example/lib/CommonKt.class" in jvmJarEntries)
                 Assert.assertTrue("com/example/lib/MainKt.class" in jvmJarEntries)

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-and-app/sample-lib/build.gradle

@@ -27,7 +27,16 @@ kotlin {
         fromPreset(presets.linuxX64, 'linux64')
         fromPreset(presets.mingwX64, 'mingw64')
         fromPreset(presets.macosX64, 'macos64')
+
+        all {
+            mavenPublication {
+                pom.withXml {
+                    asNode().appendNode('name', 'Sample MPP library')
+                }
+            }
+        }
     }
+
     sourceSets {
         jvm6Main {
             dependencies {

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/KotlinMultiplatformPlugin.kt

@@ -126,6 +126,9 @@ class KotlinMultiplatformPlugin(
                 }
 
                 variant.publicationDelegate = variantPublication
+                (target as AbstractKotlinTarget).publicationConfigureActions.all {
+                    it.execute(variantPublication)
+                }
             }
         }
 

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/kotlinTargets.kt

@@ -4,6 +4,9 @@
  */
 package org.jetbrains.kotlin.gradle.plugin.mpp
 
+import groovy.lang.Closure
+import org.gradle.api.Action
+import org.gradle.api.DomainObjectSet
 import org.gradle.api.NamedDomainObjectContainer
 import org.gradle.api.Project
 import org.gradle.api.artifacts.Dependency
@@ -11,6 +14,9 @@ import org.gradle.api.attributes.Attribute
 import org.gradle.api.attributes.AttributeContainer
 import org.gradle.api.internal.component.UsageContext
 import org.gradle.api.plugins.JavaPlugin
+import org.gradle.api.publish.maven.MavenPublication
+import org.gradle.util.ConfigureUtil
+import org.gradle.util.WrapUtil
 import org.jetbrains.kotlin.gradle.plugin.*
 import org.jetbrains.kotlin.gradle.utils.isGradleVersionAtLeast
 import org.jetbrains.kotlin.gradle.utils.lowerCamelCaseName
@@ -61,6 +67,17 @@ abstract class AbstractKotlinTarget (
                     runtimeElementsConfigurationName
                 )
             ) else emptyList()
+
+    @Suppress("UNCHECKED_CAST")
+    internal val publicationConfigureActions =
+        WrapUtil.toDomainObjectSet(Action::class.java) as DomainObjectSet<Action<MavenPublication>>
+
+    override fun mavenPublication(action: Action<MavenPublication>) {
+        publicationConfigureActions.add(action)
+    }
+
+    override fun mavenPublication(action: Closure<Unit>) =
+        mavenPublication(ConfigureUtil.configureUsing(action))
 }
 
 internal fun KotlinTarget.disambiguateName(simpleName: String) =

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/tasks/KotlinNativeTasks.kt

@@ -108,8 +108,7 @@ open class KotlinNativeCompile : AbstractCompile() {
         @InputFiles get() = compilation.compileDependencyFiles
 
     private val friendModule: FileCollection?
-        // It's already taken into account in libraries
-        @Internal get() = compilation.friendCompilation?.output
+        get() = compilation.friendCompilation?.output
 
     override fun getClasspath(): FileCollection = libraries
     override fun setClasspath(configuration: FileCollection?) {