use paper plugin loader to avoid maven central warning

core/build.gradle.kts

@@ -25,6 +25,7 @@ plugins {
 
 val apiVersion = "1.19"
 val main = "com.volmit.iris.Iris"
+val loader = "com.volmit.iris.IrisPluginLoader"
 
 val dynamic: Configuration by configurations.creating
 configurations.compileOnly { extendsFrom(dynamic) }
@@ -69,6 +70,7 @@ dependencies {
     implementation("net.kyori:adventure-platform-bukkit:4.3.4")
     implementation("net.kyori:adventure-api:4.17.0")
     implementation("org.bstats:bstats-bukkit:3.1.0")
+    implementation(project(":core:paper-loader"))
 
     // Dynamically Loaded
     dynamic("commons-io:commons-io:2.13.0")
@@ -118,6 +120,7 @@ tasks {
             "version" to rootProject.version,
             "apiVersion" to apiVersion,
             "main" to main,
+            "loader" to loader,
             "libraries" to dynamic.allDependencies.map { "\n  - $it" }.sorted().joinToString("")
         )
         filesMatching("**/plugin.yml") {

core/paper-loader/build.gradle.kts

@@ -0,0 +1,3 @@
+dependencies {
+    compileOnly("io.papermc.paper:paper-api:1.20.1-R0.1-SNAPSHOT")
+}

core/paper-loader/src/main/java/com/volmit/iris/IrisPluginLoader.java

@@ -0,0 +1,37 @@
+package com.volmit.iris;
+
+import io.papermc.paper.plugin.loader.PluginClasspathBuilder;
+import io.papermc.paper.plugin.loader.PluginLoader;
+import io.papermc.paper.plugin.loader.library.impl.MavenLibraryResolver;
+import lombok.SneakyThrows;
+import org.bukkit.configuration.file.YamlConfiguration;
+import org.eclipse.aether.artifact.DefaultArtifact;
+import org.eclipse.aether.graph.Dependency;
+import org.eclipse.aether.repository.RemoteRepository;
+import org.jetbrains.annotations.NotNull;
+
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.net.URI;
+
+@SuppressWarnings("all")
+public class IrisPluginLoader implements PluginLoader {
+
+    @SneakyThrows
+    @Override
+    public void classloader(@NotNull PluginClasspathBuilder builder) {
+        var pluginUri = URI.create("jar:file:" + builder.getContext().getPluginSource().toAbsolutePath() + "!/plugin.yml");
+        var plugin = YamlConfiguration.loadConfiguration(new BufferedReader(new InputStreamReader(pluginUri.toURL().openStream())));
+        var repository = "https://maven-central.storage-download.googleapis.com/maven2";
+
+        try {
+            var field = MavenLibraryResolver.class.getDeclaredField("MAVEN_CENTRAL_DEFAULT_MIRROR");
+            repository = (String) field.get(null);
+        } catch (Throwable e) {}
+
+        var resolver = new MavenLibraryResolver();
+        resolver.addRepository(new RemoteRepository.Builder("central", "default", repository).build());
+        plugin.getStringList("libraries").forEach(library -> resolver.addDependency(new Dependency(new DefaultArtifact(library), null)));
+        builder.addLibrary(resolver);
+    }
+}

core/src/main/resources/plugin.yml

@@ -11,3 +11,6 @@ commands:
     aliases: [ ir, irs ]
 api-version: '${apiVersion}'
 hotload-dependencies: false
+
+paper-plugin-loader: ${loader}
+paper-skip-libraries: true

settings.gradle.kts

@@ -21,7 +21,7 @@ plugins {
 
 rootProject.name = "Iris"
 
-include(":core", ":core:agent")
+include(":core", ":core:agent", ":core:paper-loader")
 include(
         ":nms:v1_21_R5",
         ":nms:v1_21_R4",