Make local maven url configurable

build.gradle

@@ -2,6 +2,7 @@ plugins {
     id 'java'
 	id 'maven-publish'
 	id 'org.cadixdev.licenser' version '0.6.1'
+	id 'eclipse'
 }
 
 group 'net.fabricmc'

src/main/java/net/fabricmc/meta/FabricMeta.java

@@ -16,18 +16,51 @@
 
 package net.fabricmc.meta;
 
-import net.fabricmc.meta.data.VersionDatabase;
-import net.fabricmc.meta.web.WebServer;
-
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.HashMap;
+import java.util.Map;
 import java.util.concurrent.Executors;
 import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.TimeUnit;
 
-public class FabricMeta {
+import com.google.gson.stream.JsonReader;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
+import net.fabricmc.meta.data.VersionDatabase;
+import net.fabricmc.meta.utils.Reference;
+import net.fabricmc.meta.web.WebServer;
+
+public class FabricMeta {
 	public static volatile VersionDatabase database;
 
+	private static final Logger LOGGER = LoggerFactory.getLogger(VersionDatabase.class);
+	private static final Map<String, String> config = new HashMap<>();
+	private static boolean configInitialized;
+
 	public static void main(String[] args) {
+		Path configFile = Paths.get("config.json");
+
+		if (Files.exists(configFile)) {
+			try (JsonReader reader = new JsonReader(Files.newBufferedReader(configFile))) {
+				reader.beginObject();
+
+				while (reader.hasNext()) {
+					config.put(reader.nextName(), reader.nextString());
+				}
+
+				reader.endObject();
+			} catch (IOException | IllegalStateException e) {
+				throw new RuntimeException("malformed config in "+configFile, e);
+			}
+		}
+
+		configInitialized = true;
+
+		LOGGER.info("Starting with local maven {}", Reference.LOCAL_FABRIC_MAVEN_URL);
 
 		update();
 
@@ -49,4 +82,9 @@ private static void update(){
 		}
 	}
 
+	public static Map<String, String> getConfig() {
+		if (!configInitialized) throw new IllegalStateException("accessing config before initialization"); // to catch any accidental early access through <clinit> etc
+
+		return config;
+	}
 }

src/main/java/net/fabricmc/meta/data/VersionDatabase.java

@@ -16,28 +16,33 @@
 
 package net.fabricmc.meta.data;
 
-import net.fabricmc.meta.utils.MinecraftLauncherMeta;
-import net.fabricmc.meta.utils.PomParser;
-import net.fabricmc.meta.web.models.*;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
+import static net.fabricmc.meta.utils.Reference.LOCAL_FABRIC_MAVEN_URL;
 
-import javax.xml.stream.XMLStreamException;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Comparator;
 import java.util.List;
 import java.util.stream.Collectors;
 
-public class VersionDatabase {
+import javax.xml.stream.XMLStreamException;
 
-	public static final String MAVEN_URL = "https://maven.fabricmc.net/";
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
-	public static final PomParser MAPPINGS_PARSER = new PomParser(MAVEN_URL + "net/fabricmc/yarn/maven-metadata.xml");
-	public static final PomParser INTERMEDIARY_PARSER = new PomParser(MAVEN_URL + "net/fabricmc/intermediary/maven-metadata.xml");
-	public static final PomParser LOADER_PARSER = new PomParser(MAVEN_URL + "net/fabricmc/fabric-loader/maven-metadata.xml");
-	public static final PomParser INSTALLER_PARSER = new PomParser(MAVEN_URL + "net/fabricmc/fabric-installer/maven-metadata.xml");
+import net.fabricmc.meta.utils.MinecraftLauncherMeta;
+import net.fabricmc.meta.utils.PomParser;
+import net.fabricmc.meta.web.models.BaseVersion;
+import net.fabricmc.meta.web.models.MavenBuildGameVersion;
+import net.fabricmc.meta.web.models.MavenBuildVersion;
+import net.fabricmc.meta.web.models.MavenUrlVersion;
+import net.fabricmc.meta.web.models.MavenVersion;
+
+public class VersionDatabase {
+	public static final PomParser MAPPINGS_PARSER = new PomParser(LOCAL_FABRIC_MAVEN_URL + "net/fabricmc/yarn/maven-metadata.xml");
+	public static final PomParser INTERMEDIARY_PARSER = new PomParser(LOCAL_FABRIC_MAVEN_URL + "net/fabricmc/intermediary/maven-metadata.xml");
+	public static final PomParser LOADER_PARSER = new PomParser(LOCAL_FABRIC_MAVEN_URL + "net/fabricmc/fabric-loader/maven-metadata.xml");
+	public static final PomParser INSTALLER_PARSER = new PomParser(LOCAL_FABRIC_MAVEN_URL + "net/fabricmc/fabric-installer/maven-metadata.xml");
 
 	private static final ArrayList<String> incorrectVersions = new ArrayList<>();
 	private static final Logger LOGGER = LoggerFactory.getLogger(VersionDatabase.class);
@@ -107,7 +112,7 @@ private void loadMcData() throws IOException {
 	public List<MavenBuildVersion> getLoader() {
 		return loader.stream().filter(VersionDatabase::isPublicLoaderVersion).collect(Collectors.toList());
 	}
-	
+
 	private static boolean isPublicLoaderVersion(BaseVersion version) {
 		return true;
 	}

src/main/java/net/fabricmc/meta/utils/LoaderMeta.java

@@ -16,21 +16,20 @@
 
 package net.fabricmc.meta.utils;
 
-import com.google.gson.JsonObject;
-import net.fabricmc.meta.web.WebServer;
-import net.fabricmc.meta.web.models.LoaderInfoBase;
-import org.apache.commons.io.FileUtils;
-
 import java.io.File;
 import java.io.FileNotFoundException;
 import java.io.FileReader;
 import java.io.IOException;
 import java.net.URL;
 
-public class LoaderMeta {
+import com.google.gson.JsonObject;
+import org.apache.commons.io.FileUtils;
+
+import net.fabricmc.meta.web.WebServer;
+import net.fabricmc.meta.web.models.LoaderInfoBase;
 
+public class LoaderMeta {
 	public static final File BASE_DIR = new File("metadata");
-	public static final String MAVEN_URL = "https://maven.fabricmc.net/";
 
 	public static JsonObject getMeta(LoaderInfoBase loaderInfo){
 		String loaderMaven = loaderInfo.getLoader().getMaven();
@@ -41,7 +40,7 @@ public static JsonObject getMeta(LoaderInfoBase loaderInfo){
 		File launcherMetaFile = new File(BASE_DIR, path + "/" + filename);
 		if(!launcherMetaFile.exists()){
 			try {
-				String url = String.format("%s%s/%s", MAVEN_URL, path, filename);
+				String url = String.format("%s%s/%s", Reference.LOCAL_FABRIC_MAVEN_URL, path, filename);
 				System.out.println("Downloading " + url);
 				FileUtils.copyURLToFile(new URL(url), launcherMetaFile);
 			} catch (IOException e) {

src/main/java/net/fabricmc/meta/utils/MinecraftLauncherMeta.java

@@ -16,17 +16,19 @@
 
 package net.fabricmc.meta.utils;
 
-import com.google.gson.Gson;
-import com.google.gson.GsonBuilder;
-import org.apache.commons.io.IOUtils;
-
 import java.io.IOException;
 import java.net.URL;
 import java.nio.charset.StandardCharsets;
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
 
-public class MinecraftLauncherMeta {
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import org.apache.commons.io.IOUtils;
 
+public class MinecraftLauncherMeta {
 	public static final Gson GSON = new GsonBuilder().create();
 
 	List<Version> versions;
@@ -45,7 +47,7 @@ public static MinecraftLauncherMeta getMeta() throws IOException {
 	}
 
 	public static MinecraftLauncherMeta getExperimentalMeta() throws IOException {
-		String url = "https://maven.fabricmc.net/net/minecraft/experimental_versions.json";
+		String url = Reference.LOCAL_FABRIC_MAVEN_URL+"net/minecraft/experimental_versions.json";
 		String json = IOUtils.toString(new URL(url), StandardCharsets.UTF_8);
 		return GSON.fromJson(json, MinecraftLauncherMeta.class);
 	}

src/main/java/net/fabricmc/meta/utils/Reference.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2019 FabricMC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.fabricmc.meta.utils;
+
+import net.fabricmc.meta.FabricMeta;
+
+public final class Reference {
+	/**
+	 * Fabric maven url to expose to the user.
+	 *
+	 * <p>This shouldn't be directly accessed by this meta server instance!
+	 */
+	public static final String FABRIC_MAVEN_URL = "https://maven.fabricmc.net/";
+
+	/**
+	 * Fabric maven url to access from this meta server instance.
+	 *
+	 * <p>This is not to be included in any output data!
+	 */
+	public static final String LOCAL_FABRIC_MAVEN_URL = FabricMeta.getConfig().getOrDefault("localFabricMavenUrl", FABRIC_MAVEN_URL);
+}

src/main/java/net/fabricmc/meta/web/ProfileHandler.java

@@ -35,7 +35,7 @@
 import com.google.gson.JsonObject;
 import org.apache.commons.io.IOUtils;
 
-import net.fabricmc.meta.utils.LoaderMeta;
+import net.fabricmc.meta.utils.Reference;
 import net.fabricmc.meta.web.models.LoaderInfoV2;
 
 public class ProfileHandler {
@@ -113,8 +113,8 @@ private static JsonObject buildProfileJson(LoaderInfoV2 info, String side) {
 		JsonObject librariesObject = launcherMeta.get("libraries").getAsJsonObject();
 		// Build the libraries array with the existing libs + loader and intermediary
 		JsonArray libraries = (JsonArray) librariesObject.get("common");
-		libraries.add(getLibrary(info.getIntermediary().getMaven(), LoaderMeta.MAVEN_URL));
-		libraries.add(getLibrary(info.getLoader().getMaven(), LoaderMeta.MAVEN_URL));
+		libraries.add(formatLibrary(info.getIntermediary().getMaven(), Reference.FABRIC_MAVEN_URL));
+		libraries.add(formatLibrary(info.getLoader().getMaven(), Reference.FABRIC_MAVEN_URL));
 
 		if (librariesObject.has(side)) {
 			libraries.addAll(librariesObject.get(side).getAsJsonArray());
@@ -159,7 +159,7 @@ private static JsonObject buildProfileJson(LoaderInfoV2 info, String side) {
 		return profile;
 	}
 
-	private static JsonObject getLibrary(String mavenPath, String url) {
+	private static JsonObject formatLibrary(String mavenPath, String url) {
 		JsonObject jsonObject = new JsonObject();
 		jsonObject.addProperty("name", mavenPath);
 		jsonObject.addProperty("url", url);