move minecraft home path retrieval to separate util class

src/main/java/com/falsepattern/lib/config/ConfigurationManager.java

@@ -3,10 +3,13 @@ package com.falsepattern.lib.config;
 import com.falsepattern.lib.StableAPI;
 import com.falsepattern.lib.internal.CoreLoadingPlugin;
 import com.falsepattern.lib.internal.FalsePatternLib;
+import com.falsepattern.lib.util.FileUtil;
 import cpw.mods.fml.client.config.IConfigElement;
 import cpw.mods.fml.client.event.ConfigChangedEvent;
 import cpw.mods.fml.common.FMLCommonHandler;
 import cpw.mods.fml.common.eventhandler.SubscribeEvent;
+
+import java.io.File;
 import java.lang.reflect.Field;
 import java.lang.reflect.InvocationTargetException;
 import java.nio.file.Path;
@@ -24,6 +27,7 @@ import lombok.NoArgsConstructor;
 import lombok.SneakyThrows;
 import lombok.val;
 import lombok.var;
+import net.minecraft.launchwrapper.Launch;
 import net.minecraftforge.common.config.ConfigElement;
 import net.minecraftforge.common.config.Configuration;
 
@@ -49,6 +53,7 @@ public class ConfigurationManager {
      * @param configClass The class to register.
      */
     public static void registerConfig(Class<?> configClass) throws ConfigException {
+        init();
         val cfg = Optional.ofNullable(configClass.getAnnotation(Config.class))
                           .orElseThrow(() -> new ConfigException(
                                   "Class " + configClass.getName() + " does not have a @Config annotation!"));
@@ -192,6 +197,7 @@ public class ConfigurationManager {
      */
     @SuppressWarnings({"rawtypes", "unchecked"})
     public static List<IConfigElement> getConfigElements(Class<?> configClass) throws ConfigException {
+        init();
         val cfg = Optional.ofNullable(configClass.getAnnotation(Config.class))
                           .orElseThrow(() -> new ConfigException(
                                   "Class " + configClass.getName() + " does not have a @Config annotation!"));
@@ -217,14 +223,11 @@ public class ConfigurationManager {
         })).collect(Collectors.toList());
     }
 
-    /**
-     * Internal, do not use.
-     */
-    public static void init() {
+    private static void init() {
         if (initialized) {
             return;
         }
-        configDir = CoreLoadingPlugin.mcDir.toPath().resolve("config");
+        configDir = FileUtil.getMinecraftHome().toPath().resolve("config");
         FMLCommonHandler.instance().bus().register(instance);
         initialized = true;
     }
@@ -236,6 +239,7 @@ public class ConfigurationManager {
      */
     @SubscribeEvent
     public void onConfigChanged(ConfigChangedEvent.OnConfigChangedEvent event) {
+        init();
         val config = configs.get(event.modID);
         if (config == null) {
             return;

src/main/java/com/falsepattern/lib/dependencies/DependencyLoader.java

@@ -14,6 +14,7 @@ import java.util.HashSet;
 import java.util.Map;
 import java.util.Set;
 
+import com.falsepattern.lib.util.FileUtil;
 import lombok.*;
 import net.minecraft.launchwrapper.LaunchClassLoader;
 
@@ -84,7 +85,7 @@ public class DependencyLoader {
             }
             return;
         }
-        val modsDir = new File(CoreLoadingPlugin.mcDir, "mods");
+        val modsDir = new File(FileUtil.getMinecraftHome(), "mods");
         val mavenJarName =
                 String.format("%s-%s%s.jar", artifactId, preferredVersion, (suffix != null) ? ("-" + suffix) : "");
         val jarName = groupId + "-" + mavenJarName;

src/main/java/com/falsepattern/lib/internal/CoreLoadingPlugin.java

@@ -12,7 +12,6 @@ import java.util.Map;
 @Name(Tags.MODID)
 @SortingIndex(500)
 public class CoreLoadingPlugin implements IFMLLoadingPlugin {
-    public static File mcDir;
 
     @Override
     public String[] getASMTransformerClass() {
@@ -31,8 +30,6 @@ public class CoreLoadingPlugin implements IFMLLoadingPlugin {
 
     @Override
     public void injectData(Map<String, Object> data) {
-        mcDir = (File) data.get("mcLocation");
-        ConfigurationManager.init();
     }
 
     @Override

src/main/java/com/falsepattern/lib/mixin/IMixinPlugin.java

@@ -11,6 +11,8 @@ import java.util.Arrays;
 import java.util.List;
 import java.util.Set;
 import java.util.stream.Collectors;
+
+import com.falsepattern.lib.util.FileUtil;
 import lombok.val;
 import net.minecraft.launchwrapper.Launch;
 import org.apache.logging.log4j.LogManager;
@@ -23,7 +25,7 @@ import static java.nio.file.Files.walk;
 
 @StableAPI(since = "0.8.0")
 public interface IMixinPlugin extends IMixinConfigPlugin {
-    Path MODS_DIRECTORY_PATH = CoreLoadingPlugin.mcDir.toPath().resolve("mods");
+    Path MODS_DIRECTORY_PATH = FileUtil.getMinecraftHome().toPath().resolve("mods");
 
     static Logger createLogger(String modName) {
         return LogManager.getLogger(modName + " Mixin Loader");

src/main/java/com/falsepattern/lib/util/FileUtil.java

@@ -0,0 +1,13 @@
+package com.falsepattern.lib.util;
+
+import com.falsepattern.lib.StableAPI;
+import net.minecraft.launchwrapper.Launch;
+
+import java.io.File;
+
+@StableAPI(since = "0.8.2")
+public class FileUtil {
+    public static File getMinecraftHome() {
+        return Launch.minecraftHome == null ? new File(".") : Launch.minecraftHome;
+    }
+}