use managed objects, allow caching, require less config

src/main/kotlin/com/openosrs/injector/Inject.kt

@@ -9,40 +9,31 @@ package com.openosrs.injector
 
 import com.openosrs.injector.injection.InjectTaskHandler
 import org.gradle.api.DefaultTask
-import org.gradle.api.tasks.InputFile
+import org.gradle.api.file.RegularFileProperty
+import org.gradle.api.tasks.CacheableTask
+import org.gradle.api.tasks.Nested
 import org.gradle.api.tasks.OutputFile
 import org.gradle.api.tasks.TaskAction
 
-open class Inject: DefaultTask() {
-    @InputFile
-    val vanilla = project.objects.fileProperty()
+@CacheableTask
+abstract class Inject: DefaultTask() {
+    @get:Nested
+    abstract val extension: InjectExtension
 
-    @InputFile
-    val rsclient = project.objects.fileProperty()
-
-    @InputFile
-    val mixins = project.objects.fileProperty()
-
-    @InputFile
-    val rsapi = project.objects.fileProperty()
-
-    @OutputFile
-    val output = project.objects.fileProperty().convention {
-        project.file("${project.buildDir}/libs/${project.name}-${project.version}.jar")
-    }
+    @get:OutputFile
+    abstract val output: RegularFileProperty
 
     @TaskAction
     fun inject() {
-        val vanilla = this.vanilla.get().asFile
-        val rsclient = this.rsclient.get().asFile
-        val mixins = this.mixins.get().asFile
-        val rsapi = project.zipTree(this.rsapi)
-        val output = this.output.asFile
+        val vanilla = extension.vanilla.get().asFile
+        val rsclient = extension.rsclient.get().asFile
+        val mixins = extension.mixins.get().asFile
+        val rsapi = project.zipTree(extension.rsapi)
 
         val injector: InjectTaskHandler = Injection(vanilla, rsclient, mixins, rsapi)
 
         injector.inject()
 
-        injector.save(output.get())
+        injector.save(output.get().asFile)
     }
 }

src/main/kotlin/com/openosrs/injector/InjectExtension.kt

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2019, Lucas <https://github.com/Lucwousin>
+ * All rights reserved.
+ *
+ * This code is licensed under GPL3, see the complete license in
+ * the LICENSE file in the root directory of this source tree.
+ */
+package com.openosrs.injector
+
+import org.gradle.api.file.RegularFileProperty
+import org.gradle.api.tasks.InputFile
+import org.gradle.api.tasks.PathSensitive
+import org.gradle.api.tasks.PathSensitivity
+
+interface InjectExtension {
+    @get:[InputFile PathSensitive(PathSensitivity.NONE)]
+    val vanilla: RegularFileProperty
+    @get:[InputFile PathSensitive(PathSensitivity.NONE)]
+    val rsclient: RegularFileProperty
+    @get:[InputFile PathSensitive(PathSensitivity.NONE)]
+    val mixins: RegularFileProperty
+    @get:[InputFile PathSensitive(PathSensitivity.NONE)]
+    val rsapi: RegularFileProperty
+}
+

src/main/kotlin/com/openosrs/injector/InjectPlugin.kt

@@ -11,17 +11,18 @@ import org.gradle.api.Plugin
 import org.gradle.api.Project
 
 class InjectPlugin: Plugin<Project> {
-    override fun apply(project: Project) {
-        val extension = project.extensions.create("injector", Injextention::class.java, project)
+    override fun apply(project: Project) { with(project) {
+        val task = tasks.create("inject", Inject::class.java)
+        task.output.convention { file("$buildDir/libs/$name-$version.jar") }
 
-        project.tasks.create("inject", Inject::class.java) {
-            it.vanilla.set(extension.vanilla)
-            it.rsclient.set(extension.rsclient)
-            it.mixins.set(extension.mixins)
-            it.rsapi.set(extension.rsapi)
-            if (extension.output.isPresent) {
-                it.output.set(extension.output)
-            }
+        artifacts {
+            it.add("runtimeElements", task.output)
         }
-    }
+
+        tasks.getByName("assemble") {
+            it.finalizedBy("inject")
+        }
+
+        extensions.add(InjectExtension::class.java, "injector", task.extension)
+    }}
 }

src/main/kotlin/com/openosrs/injector/Injextention.kt

@@ -1,19 +0,0 @@
-/*
- * Copyright (c) 2019, Lucas <https://github.com/Lucwousin>
- * All rights reserved.
- *
- * This code is licensed under GPL3, see the complete license in
- * the LICENSE file in the root directory of this source tree.
- */
-package com.openosrs.injector
-
-import org.gradle.api.Project
-
-open class Injextention(project: Project) {
-    val vanilla = project.objects.fileProperty()
-    val rsclient = project.objects.fileProperty()
-    val mixins = project.objects.fileProperty()
-    val rsapi = project.objects.fileProperty()
-    val output = project.objects.fileProperty()
-}
-