Extract widener definition into a widener.gradle.kts plugin

SpigotCore/SpigotCore_Main/build.gradle.kts

@@ -19,6 +19,7 @@
 
 plugins {
     steamwar.java
+    widener
 }
 
 tasks.compileJava {
@@ -42,45 +43,6 @@ tasks.withType<Test>().configureEach {
     jvmArgs("--add-exports", "java.base/jdk.internal.misc=ALL-UNNAMED")
 }
 
-// ─── Collect all .accesswidener files from this plugin's resources ────────────
-val accessWidenerFiles: FileCollection = fileTree("src/") {
-    include("**/*.accesswidener")
-}
-
-val paperJarProvider: Provider<File> = provider {
-    val dep = libs.nms.get()
-    configurations["compileClasspath"].resolvedConfiguration.resolvedArtifacts.first { artifact ->
-        artifact.moduleVersion.id.module.group == dep.module.group && artifact.moduleVersion.id.module.name == dep.module.name
-    }.file
-}
-
-// ─── Widen the Paper dev JAR so the IDE / javac see the patched access ────────
-val widenedJar by tasks.registering(JavaExec::class) {
-    description = "Produces a widened copy of the Paper dev JAR for compile-time use."
-    group = "widener"
-
-    // Re-run whenever the .accesswidener files change
-    inputs.file(paperJarProvider)
-    inputs.files(accessWidenerFiles)
-
-    val output = layout.buildDirectory.file("widened/paper-widened.jar")
-    outputs.file(output)
-
-    classpath = project(":AccessWidener").tasks.named<com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar>("shadowJar").get().outputs.files
-
-    mainClass.set("de.steamwar.Main")
-
-    doFirst {
-        args = buildList {
-            add(paperJarProvider.get().absolutePath)
-            add(output.get().asFile.absolutePath)
-            addAll(accessWidenerFiles.map { it.absolutePath })
-        }
-    }
-
-    dependsOn(":AccessWidener:shadowJar")
-}
-
 dependencies {
     compileOnly(libs.classindex)
     annotationProcessor(libs.classindex)
@@ -92,7 +54,6 @@ dependencies {
 
     compileOnly(libs.paperapi)
     compileOnly(libs.nms)
-    compileOnly(files(widenedJar))
     compileOnly(libs.authlib)
     compileOnly(libs.datafixer)
     compileOnly(libs.netty)
@@ -102,6 +63,6 @@ dependencies {
     implementation(libs.anvilgui)
 }
 
-tasks.compileJava {
-    dependsOn(widenedJar)
+widener {
+    fromCatalog(libs.nms)
 }