From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Dreeam <61569423+Dreeam-qwq@users.noreply.github.com>
Date: Sat, 3 Feb 2024 18:45:53 -0500
Subject: [PATCH] Configurable LibraryLoader maven repos

Add JVM flag `-DLeaf.library-download-repo=link` to choose library download repo link.
e.g. `-DLeaf.library-download-repo=https://maven.aliyun.com/repository/public`

diff --git a/src/main/java/io/papermc/paper/plugin/loader/library/impl/MavenLibraryResolver.java b/src/main/java/io/papermc/paper/plugin/loader/library/impl/MavenLibraryResolver.java
index 0c0c14936bf5a45ac7e2bf486cdb82da31b33b46..68400696343ab0846d3a4c9bb29c98e1f0d83584 100644
--- a/src/main/java/io/papermc/paper/plugin/loader/library/impl/MavenLibraryResolver.java
+++ b/src/main/java/io/papermc/paper/plugin/loader/library/impl/MavenLibraryResolver.java
@@ -59,12 +59,25 @@ public class MavenLibraryResolver implements ClassPathLibrary {
      * <p>This repository is also used by the legacy {@link org.bukkit.plugin.java.LibraryLoader}.</p>
      */
     public static final String MAVEN_CENTRAL_DEFAULT_MIRROR = getDefaultMavenCentralMirror();
-    private static final List<String> MAVEN_CENTRAL_URLS = List.of(
+    // Leaf start - Configurable LibraryLoader maven repos
+    @org.jspecify.annotations.Nullable
+    public static final RemoteRepository CUSTOM_MAVEN_CENTRAL_MIRROR_REPO = getCustomCentralMirrorRepo();
+    private static final String[] MAVEN_CENTRAL_URLS = new String[]{
         "https://repo1.maven.org/maven2",
         "http://repo1.maven.org/maven2",
         "https://repo.maven.apache.org/maven2",
         "http://repo.maven.apache.org/maven2"
-    );
+    };
+    // From https://storage-download.googleapis.com/maven-central/index.html
+    private static final String[] MAVEN_CENTRAL_GOOGLE_MIRROR_URLS = new String[]{
+        "https://maven-central.storage-download.googleapis.com/maven2",
+        "http://maven-central.storage-download.googleapis.com/maven2",
+        "https://maven-central-eu.storage-download.googleapis.com/maven2",
+        "http://maven-central-eu.storage-download.googleapis.com/maven2",
+        "https://maven-central-asia.storage-download.googleapis.com/maven2",
+        "http://maven-central-asia.storage-download.googleapis.com/maven2"
+    };
+    // Leaf end - Configurable LibraryLoader maven repos
     private static final Logger LOGGER = LoggerFactory.getLogger("MavenLibraryResolver");
 
     private final RepositorySystem repository;
@@ -120,12 +133,33 @@ public class MavenLibraryResolver implements ClassPathLibrary {
      * dependencies from
      */
     public void addRepository(final RemoteRepository remoteRepository) {
-        if (MAVEN_CENTRAL_URLS.stream().anyMatch(remoteRepository.getUrl()::startsWith)) {
+        // Leaf start - Configurable LibraryLoader maven repos
+        for (String url : MAVEN_CENTRAL_URLS) {
+            if (remoteRepository.getUrl().startsWith(url)) {
+                RemoteRepository mirrorRepo = CUSTOM_MAVEN_CENTRAL_MIRROR_REPO;
+                if (mirrorRepo != null) {
+                    this.repositories.add(mirrorRepo);
+                    return;
+                }
+                // Leaf end - Configurable LibraryLoader maven repos
             LOGGER.warn(
                 "Use of Maven Central as a CDN is against the Maven Central Terms of Service. Use MavenLibraryResolver.MAVEN_CENTRAL_DEFAULT_MIRROR instead. DO NOT report this to Paper or Leaf! Please contact plugin's support to adapt this change.", // Leaf - Better warning message for discouraging Maven Central as CDN
                 new RuntimeException("Plugin used Maven Central for library resolution")
             );
+                // Leaf start - Configurable LibraryLoader maven repos
+            }
+        }
+        // Match google api maven central mirror urls
+        for (String url : MAVEN_CENTRAL_GOOGLE_MIRROR_URLS) {
+            if (remoteRepository.getUrl().startsWith(url)) {
+                RemoteRepository mirrorRepo = CUSTOM_MAVEN_CENTRAL_MIRROR_REPO;
+                if (mirrorRepo != null) {
+                    this.repositories.add(mirrorRepo);
+                    return;
+                }
+            }
         }
+        // Leaf end - Configurable LibraryLoader maven repos
         this.repositories.add(remoteRepository);
     }
 
@@ -162,4 +196,15 @@ public class MavenLibraryResolver implements ClassPathLibrary {
         }
         return central;
     }
+
+    // Leaf start - Configurable LibraryLoader maven repos
+    @org.jspecify.annotations.Nullable
+    private static RemoteRepository getCustomCentralMirrorRepo() {
+        String mirrorAddr = System.getProperty("Leaf.library-download-repo");
+        if (mirrorAddr != null) {
+            return new RemoteRepository.Builder("central", "default", mirrorAddr).build();
+        }
+        return null;
+    }
+    // Leaf end - Configurable LibraryLoader maven repos
 }
diff --git a/src/main/java/org/bukkit/plugin/java/LibraryLoader.java b/src/main/java/org/bukkit/plugin/java/LibraryLoader.java
index 70d57e6abbd876d7f3087905d5277777162d317c..15992c275ae143af5b140a787f921658de58e05a 100644
--- a/src/main/java/org/bukkit/plugin/java/LibraryLoader.java
+++ b/src/main/java/org/bukkit/plugin/java/LibraryLoader.java
@@ -47,6 +47,7 @@ public class LibraryLoader {
     public static java.util.function.Function<List<java.nio.file.Path>, List<java.nio.file.Path>> REMAPPER; // Paper - remap libraries
 
     private static List<RemoteRepository> getRepositories() {
+        if (io.papermc.paper.plugin.loader.library.impl.MavenLibraryResolver.CUSTOM_MAVEN_CENTRAL_MIRROR_REPO  != null) return List.of(io.papermc.paper.plugin.loader.library.impl.MavenLibraryResolver.CUSTOM_MAVEN_CENTRAL_MIRROR_REPO ); // Leaf - Configurable LibraryLoader maven repos
         return List.of(new RemoteRepository.Builder("central", "default", MavenLibraryResolver.MAVEN_CENTRAL_DEFAULT_MIRROR).build());
     }