create TypeScriptToLua Gradle task, and some Gradle cleanup / experiments

buildSrc/src/main/kotlin/dev/adamko/kafkatorio/task/TypescriptToLuaTask.kt

@@ -0,0 +1,43 @@
+package dev.adamko.kafkatorio.task
+
+import com.github.gradle.node.npm.task.NpmTask
+import org.gradle.api.file.DirectoryProperty
+import org.gradle.api.plugins.BasePlugin
+import org.gradle.api.tasks.InputDirectory
+import org.gradle.api.tasks.OutputFile
+import org.gradle.api.tasks.PathSensitive
+import org.gradle.api.tasks.PathSensitivity
+import org.gradle.api.tasks.SkipWhenEmpty
+import org.jetbrains.kotlin.util.parseSpaceSeparatedArgs
+
+abstract class TypescriptToLuaTask : NpmTask() {
+
+  @get:InputDirectory
+  @get:SkipWhenEmpty
+  @get:PathSensitive(PathSensitivity.RELATIVE)
+  abstract val sourceFiles: DirectoryProperty
+
+  @get:OutputFile
+  abstract val outputDirectory: DirectoryProperty
+
+
+  init {
+    super.setGroup(BasePlugin.BUILD_GROUP)
+    super.setDescription("Convert Typescript To Lua")
+    super.execOverrides { standardOutput = System.out }
+    super.npmCommand.set(listOf("run", "build"))
+    super.args.set(parseSpaceSeparatedArgs("-- --outDir $temporaryDir"))
+    super.ignoreExitValue.set(false)
+    super.doFirst("cleanTemporaryDir") {
+      project.delete(temporaryDir)
+      project.mkdir(temporaryDir)
+    }
+    super.doLast("syncTstlOutput") {
+      project.sync {
+        from(temporaryDir)
+        into(outputDirectory)
+      }
+    }
+  }
+
+}