gradle-plugin: Make the 'target' property of tasks internal

* Rename target -> konanTarget
 * Make konanTarget internal
 * Add public property 'target: String'
 * Add methods for task access by its target

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

@@ -20,7 +20,7 @@ abstract class KonanBuildingConfig<T: KonanBuildingTask>(private val name_: Stri
                                                          type: Class<T>,
                                                          val project: ProjectInternal,
                                                          instantiator: Instantiator)
-    : KonanBuildingSpec, Named, DefaultNamedDomainObjectSet<T>(type, instantiator, { it.target.userName }) {
+    : KonanBuildingSpec, Named, DefaultNamedDomainObjectSet<T>(type, instantiator, { it.konanTarget.userName }) {
 
     override fun getName() = name_
 
@@ -60,8 +60,8 @@ abstract class KonanBuildingConfig<T: KonanBuildingTask>(private val name_: Stri
     override fun didAdd(toAdd: T) {
         super.didAdd(toAdd)
 
-        assert(toAdd.target !in targetToTask)
-        targetToTask[toAdd.target] = toAdd
+        assert(toAdd.konanTarget !in targetToTask)
+        targetToTask[toAdd.konanTarget] = toAdd
     }
 
     protected fun createTask(target: KonanTarget): T =
@@ -76,7 +76,7 @@ abstract class KonanBuildingConfig<T: KonanBuildingTask>(private val name_: Stri
                 task.group = BasePlugin.BUILD_GROUP
                 task.description = generateAggregateTaskDescription(task)
                 this.filter {
-                    project.targetIsRequested(it.target)
+                    project.targetIsRequested(it.konanTarget)
                 }.forEach {
                     task.dependsOn(it)
                 }
@@ -87,18 +87,24 @@ abstract class KonanBuildingConfig<T: KonanBuildingTask>(private val name_: Stri
             this[TargetManager.host]?.let { hostBuild ->
                 project.tasks.create(generateHostTaskName()) {
                     it.group = BasePlugin.BUILD_GROUP
-                    it.description = generateHostTaskDescription(it, hostBuild.target)
+                    it.description = generateHostTaskDescription(it, hostBuild.konanTarget)
                     it.dependsOn(hostBuild)
                 }
             }
 
-    operator fun get(target: KonanTarget) = targetToTask[target]
+    internal operator fun get(target: KonanTarget) = targetToTask[target]
+
+    fun getByTarget(target: String) = findByTarget(target) ?: throw NoSuchElementException("No such target for artifact $name: ${target}")
+    fun findByTarget(target: String) = this[TargetManager(target).target]
+
+    fun getArtifactByTarget(target: String) = getByTarget(target).artifact
+    fun findArtifactByTarget(target: String) = findByTarget(target)?.artifact
 
     // Common building DSL.
 
     override fun artifactName(name: String)  = forEach { it.artifactName(name) }
 
-    fun baseDir(dir: Any) = forEach { it.destinationDir(project.file(dir).targetSubdir(it.target)) }
+    fun baseDir(dir: Any) = forEach { it.destinationDir(project.file(dir).targetSubdir(it.konanTarget)) }
 
     override fun libraries(closure: Closure<Unit>) = forEach { it.libraries(closure) }
     override fun libraries(action: Action<KonanLibrariesSpec>) = forEach { it.libraries(action) }

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

@@ -20,7 +20,7 @@ abstract class KonanCompileConfig<T: KonanCompileTask>(name: String,
     protected abstract val typeForDescription: String
 
     override fun generateTaskDescription(task: T) =
-            "Build the Kotlin/Native $typeForDescription '${task.name}' for target '${task.target}'"
+            "Build the Kotlin/Native $typeForDescription '${task.name}' for target '${task.konanTarget}'"
 
     override fun generateAggregateTaskDescription(task: Task) =
             "Build the Kotlin/Native $typeForDescription '${task.name}' for all supported and declared targets"
@@ -74,7 +74,7 @@ open class KonanBitcode(name: String, project: ProjectInternal, instantiator: In
         get() = "bitcode"
 
     override fun generateTaskDescription(task: KonanCompileBitcodeTask) =
-            "Generates bitcode for the artifact '${task.name}' and target '${task.target}'"
+            "Generates bitcode for the artifact '${task.name}' and target '${task.konanTarget}'"
 
     override fun generateAggregateTaskDescription(task: Task) =
             "Generates bitcode for the artifact '${task.name}' for all supported and declared targets'"

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

@@ -12,7 +12,7 @@ open class KonanInteropLibrary(name: String, project: ProjectInternal, instantia
     : KonanBuildingConfig<KonanInteropTask>(name, KonanInteropTask::class.java, project, instantiator), KonanInteropSpec {
 
     override fun generateTaskDescription(task: KonanInteropTask) =
-            "Build the Kotlin/Native interop library '${task.name}' for target '${task.target}'"
+            "Build the Kotlin/Native interop library '${task.name}' for target '${task.konanTarget}'"
 
     override fun generateAggregateTaskDescription(task: Task) =
             "Build the Kotlin/Native interop library '${task.name}' for all supported and declared targets'"

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

@@ -33,7 +33,7 @@ open class KonanLibrariesSpec(val task: KonanArtifactWithLibrariesTask, val proj
         }
 
     val target: KonanTarget
-        @Internal get() = task.target
+        @Internal get() = task.konanTarget
 
     // DSL Methods
 

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

@@ -27,7 +27,7 @@ object KonanToolingModelBuilder : ToolingModelBuilder {
     override fun buildAll(modelName: String, project: Project): KonanModel {
         val artifacts = project.konanArtifactsContainer.flatten()
                 .toList()
-                .map { KonanArtifactImpl("${it.artifact.name}-${it.target.userName}", it.artifact.canonicalPath) }
+                .map { KonanArtifactImpl("${it.artifact.name}-${it.konanTarget.userName}", it.artifact.canonicalPath) }
         return KonanModelImpl(project.konanVersion, artifacts)
     }
 }

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

@@ -41,18 +41,20 @@ internal val Project.simpleOsName
 /** A task with a KonanTarget specified. */
 abstract class KonanTargetableTask: DefaultTask() {
 
-    @Input lateinit var target: KonanTarget
-        internal set
+    @Input internal lateinit var konanTarget: KonanTarget
 
     internal open fun init(target: KonanTarget) {
-        this.target = target
+        this.konanTarget = target
     }
 
     val targetIsSupported: Boolean
-        @Internal get() = target.enabled
+        @Internal get() = konanTarget.enabled
 
     val isCrossCompile: Boolean
-        @Internal get() = (target != TargetManager.host)
+        @Internal get() = (konanTarget != TargetManager.host)
+
+    val target: String
+        @Internal get() = konanTarget.userName
 }
 
 /** A task building an artifact. */

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

@@ -41,7 +41,7 @@ abstract class KonanCompileTask: KonanBuildingTask(), KonanCompileSpec {
     // Output artifact --------------------------------------------------------
 
     override val artifactSuffix: String
-        @Internal get() = produce.kind.suffix(target)
+        @Internal get() = produce.kind.suffix(konanTarget)
 
     // Other compilation parameters -------------------------------------------
 
@@ -84,7 +84,7 @@ abstract class KonanCompileTask: KonanBuildingTask(), KonanCompileSpec {
 
         addListArg("-linkerOpts", linkerOpts)
 
-        addArgIfNotNull("-target", target.userName)
+        addArgIfNotNull("-target", konanTarget.userName)
         addArgIfNotNull("-language-version", languageVersion)
         addArgIfNotNull("-api-version", apiVersion)
 

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

@@ -56,7 +56,7 @@ open class KonanInteropTask: KonanBuildingTask(), KonanInteropSpec {
 
         addArg("-o", artifact.canonicalPath)
 
-        addArgIfNotNull("-target", target.userName)
+        addArgIfNotNull("-target", konanTarget.userName)
         addArgIfNotNull("-def", defFile.canonicalPath)
         addArgIfNotNull("-pkg", packageName)