Change log folder to ~/.hmcl

HMCLCore/src/main/java/org/jackhuang/hmcl/util/Logging.java

@@ -18,6 +18,7 @@
 package org.jackhuang.hmcl.util;
 
 import java.io.ByteArrayOutputStream;
+import java.io.File;
 import java.io.IOException;
 import java.io.PrintWriter;
 import java.text.SimpleDateFormat;
@@ -37,12 +38,12 @@ public final class Logging {
         LOG = Logger.getLogger("HMCL");
     }
 
-    public static void start() {
+    public static void start(File logFolder) {
         LOG.setLevel(Level.FINER);
         LOG.setUseParentHandlers(false);
 
         try {
-            FileHandler fileHandler = new FileHandler("hmcl.log");
+            FileHandler fileHandler = new FileHandler(new File(logFolder, "hmcl.log").getAbsolutePath());
             fileHandler.setLevel(Level.FINEST);
             fileHandler.setFormatter(DefaultFormatter.INSTANCE);
             LOG.addHandler(fileHandler);

HMCLCore/src/main/java/org/jackhuang/hmcl/util/OperatingSystem.java

@@ -143,4 +143,19 @@ public enum OperatingSystem {
         System.runFinalization();
         System.gc();
     }
+
+    public static File getWorkingDirectory(String folder) {
+        String home = System.getProperty("user.home", ".");
+        switch (OperatingSystem.CURRENT_OS) {
+            case LINUX:
+                return new File(home, "." + folder + "/");
+            case WINDOWS:
+                String appdata = System.getenv("APPDATA");
+                return new File(Lang.nonNull(appdata, home), "." + folder + "/");
+            case OSX:
+                return new File(home, "Library/Application Support/" + folder);
+            default:
+                return new File(home, folder + "/");
+        }
+    }
 }