add jvm flag to dump generated lang keys to file

src/main/java/com/gtnewhorizon/gtnhlib/CommonProxy.java

@@ -24,6 +24,7 @@ public void preInit(FMLPreInitializationEvent event) {
 
  public void init(FMLInitializationEvent event) {
  NetworkHandler.init();
+ ConfigurationManager.onInit();
  }
 
  public void postInit(FMLPostInitializationEvent event) {}

src/main/java/com/gtnewhorizon/gtnhlib/config/Config.java

@@ -50,7 +50,8 @@
  * </p>
  * Default pattern: {@code %mod.%cat.%field}. Categories use the pattern without {@code %field}. Can be overridden
  * for fields with {@link Config.LangKey}. <br>
- * The generated keys can be printed to log by setting the {@code -Dgtnhlib.printkeys=true} JVM flag.
+ * The generated keys can be printed to log by setting the {@code -Dgtnhlib.printkeys=true} JVM flag or dumped to a
+ * file in the base minecraft directory by setting the {@code -Dgtnhlib.dumpkeys=true} JVM flag.
  */
  @Retention(RetentionPolicy.RUNTIME)
  @Target(ElementType.TYPE)

src/main/java/com/gtnewhorizon/gtnhlib/config/ConfigurationManager.java

@@ -1,6 +1,7 @@
 package com.gtnewhorizon.gtnhlib.config;
 
 import java.io.File;
+import java.io.IOException;
 import java.lang.annotation.Annotation;
 import java.lang.reflect.Field;
 import java.lang.reflect.InvocationTargetException;
@@ -23,6 +24,7 @@
 import net.minecraftforge.common.config.ConfigElement;
 import net.minecraftforge.common.config.Configuration;
 
+import org.apache.commons.io.FileUtils;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.jetbrains.annotations.NotNull;
@@ -43,6 +45,8 @@ public class ConfigurationManager {
  private static final Map<Configuration, Map<String, Set<Class<?>>>> configToCategoryClassMap = new HashMap<>();
  private static final String[] langKeyPlaceholders = new String[] { "%mod", "%file", "%cat", "%field" };
  private static final Boolean PRINT_KEYS = Boolean.getBoolean("gtnhlib.printkeys");
+ private static final Boolean DUMP_KEYS = Boolean.getBoolean("gtnhlib.dumpkeys");
+ private static final Map<String, List<String>> generatedLangKeys = new HashMap<>();
 
  private static final ConfigurationManager instance = new ConfigurationManager();
 
@@ -51,7 +55,7 @@ public class ConfigurationManager {
  private static Path configDir;
 
  /**
- * Registers a configuration class to be loaded. This should be done in preInit.
+ * Registers a configuration class to be loaded. This should be done before or during preInit.
  *
  * @param configClass The class to register.
  */
@@ -377,6 +381,10 @@ private static String getLangKey(Class<?> configClass, @Nullable Config.LangKey
  LOGGER.info("Lang key for category {}: {}", category.getName(), key);
  }
  }
+
+ if (DUMP_KEYS) {
+ generatedLangKeys.computeIfAbsent(cfg.modid(), k -> new ArrayList<>()).add(key + "=");
+ }
  return key;
  }
 
@@ -439,4 +447,25 @@ private static void init() {
  configDir = minecraftHome().toPath().resolve("config");
  initialized = true;
  }
+
+ public static void onInit() {
+ if (DUMP_KEYS) {
+ writeLangKeysToFile();
+ }
+ }
+
+ private static void writeLangKeysToFile() {
+ for (Map.Entry<String, List<String>> entry : generatedLangKeys.entrySet()) {
+ val langFile = new File("generated_keys_" + entry.getKey() + ".txt");
+ try {
+ FileUtils.writeLines(langFile, entry.getValue());
+ } catch (IOException e) {
+ LOGGER.error(
+ "Failed to write lang keys for {} to file {}",
+ entry.getKey(),
+ langFile.getAbsolutePath(),
+ e);
+ }
+ }
+ }
 }