gradle-plugin: Set groups and descriptions for building tasks

Issue link: https://github.com/JetBrains/kotlin-native/issues/771

tools/kotlin-native-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KonanCompileTask.kt

@@ -19,6 +19,7 @@ package org.jetbrains.kotlin.gradle.plugin
 import org.gradle.api.Named
 import org.gradle.api.Project
 import org.gradle.api.file.FileCollection
+import org.gradle.api.plugins.BasePlugin
 import org.gradle.api.tasks.*
 import java.io.File
 
@@ -194,8 +195,11 @@ open class KonanCompileConfig(
 
     val compilationTask: KonanCompileTask = project.tasks.create(
             "$taskNamePrefix${configName.capitalize()}",
-            KonanCompileTask::class.java
-    ) { it.init(this@KonanCompileConfig.name) }
+            KonanCompileTask::class.java) {
+        it.init(this@KonanCompileConfig.name)
+        it.group = BasePlugin.BUILD_GROUP
+        it.description = "Compiles the Kotlin/Native artifact '${this@KonanCompileConfig.name}'"
+    }
 
     // DSL methods --------------------------------------------------
 

tools/kotlin-native-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KonanInteropTask.kt

@@ -19,6 +19,7 @@ package org.jetbrains.kotlin.gradle.plugin
 import org.gradle.api.Named
 import org.gradle.api.Project
 import org.gradle.api.file.FileCollection
+import org.gradle.api.plugins.BasePlugin
 import org.gradle.api.tasks.*
 import java.io.File
 
@@ -157,6 +158,8 @@ open class KonanInteropConfig(
             KonanInteropTask::class.java) {
         it.init(name)
         it.manifest = "${it.stubsDir.path}/manifest.properties"
+        it.group = BasePlugin.BUILD_GROUP
+        it.description = "Generates stubs for the Kotlin/Native interop '$name'"
     }
     // Config and task to compile *.kt stubs into a library
     internal val compileStubsConfig = KonanCompileConfig("${name}InteropStubs", project, "compile").apply {
@@ -165,6 +168,8 @@ open class KonanInteropConfig(
         produce("library")
         inputFiles(project.fileTree(generateStubsTask.stubsDir).apply { builtBy(generateStubsTask) })
         manifest("${generateStubsTask.stubsDir.path}/manifest.properties")
+        compilationTask.group = BasePlugin.BUILD_GROUP
+        compilationTask.description = "Compiles stubs for the Kotlin/Native interop '${this@KonanInteropConfig.name}'"
     }
     val compileStubsTask = compileStubsConfig.compilationTask
 

tools/kotlin-native-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KonanPlugin.kt

@@ -18,6 +18,7 @@ package org.jetbrains.kotlin.gradle.plugin
 
 import org.gradle.api.*
 import org.gradle.api.file.FileCollection
+import org.gradle.api.plugins.BasePlugin
 import org.gradle.api.tasks.TaskCollection
 import org.gradle.tooling.provider.model.ToolingModelBuilderRegistry
 import java.util.*
@@ -265,6 +266,8 @@ class KonanPlugin @Inject constructor(private val registry: ToolingModelBuilderR
         // Create and set up aggregate building tasks.
         val compileKonanTask = project.getOrCreateTask("compileKonan").apply {
             dependsOn(project.supportedCompileTasks)
+            group = BasePlugin.BUILD_GROUP
+            description = "Compiles all the Kotlin/Native artifacts supported"
         }
         project.getTask("build").apply {
             dependsOn(compileKonanTask)