move compiled addons to run directories

buildSrc/src/main/kotlin/com/dfsek/terra/AddonConfig.kt

@@ -1,19 +1,47 @@
 package com.dfsek.terra
 
 import org.gradle.api.Project
+import org.gradle.api.Task
 import org.gradle.kotlin.dsl.withType
 import org.gradle.language.jvm.tasks.ProcessResources
 import java.io.File
+import java.util.*
+import java.util.function.Predicate
+import kotlin.streams.asStream
 
 
-fun Project.runDir(dir: File) {
-    tasks.withType<ProcessResources> {
-        doFirst {
+/**
+ * Configures a directory where addons will be put.
+ */
+fun Project.addonDir(dir: File, task: Task) {
+    task.doFirst {
+        dir.parentFile.mkdirs()
+        matchingAddons(dir) {
+            it.name.startsWith("Terra-") // Assume everything that starts with Terra- is a core addon.
+        }.forEach {
+            println("Deleting old addon: " + it.absolutePath)
+            it.delete()
+        }
+        project(":common:addons").subprojects.forEach { addonProject ->
+            val jar = (addonProject.tasks.named("jar").get() as org.gradle.jvm.tasks.Jar);
 
+            val target = File(dir, jar.archiveFileName.get())
+
+            val base = "${jar.archiveBaseName.get()}-${project.version}"
+
+            println("Copying addon ${jar.archiveFileName.get()} to ${target.absolutePath}. Base name: $base")
+
+            jar.archiveFile.orNull?.asFile?.copyTo(target)
         }
     }
 }
 
+fun matchingAddons(dir: File, matcher: Predicate<File>): Set<File> {
+    val matching = HashSet<File>();
+    dir.walk().maxDepth(1).asStream().filter(matcher).forEach(matching::add)
+    return matching;
+}
+
 fun Project.configureAddons() {
     tasks.withType<ProcessResources> {
         project(":common:addons").subprojects.forEach {