Attempt at fixing wrapper on windows

README.md

@@ -26,7 +26,7 @@ Steps:
 # Using a portable JVM
 - Download an [Adoptium JVM build](https://api.adoptium.net/v3/binary/latest/17/ga/windows/x64/jdk/hotspot/normal/eclipse?project=jdk)
 - Extract the directory inside the zip file into your wrappers directory
-- Create a batch script (launch.bat) with the following content, adjust the JVM path if necessary: `.\jdk-17.0.1+12\bin\java -jar latest-windows.jar`
+- Create a batch script (launch.bat) with the following content, adjust the JVM path if necessary: `.\jdk-17.0.1+12\bin\java -jar wrapper.jar`
 - Launch the batch script instead of the jar
 
 ## Licenses

wrapper/src/main/java/io/gitlab/jfronny/inceptum/util/MetaHolder.java

@@ -5,9 +5,12 @@ import io.gitlab.jfronny.inceptum.gson.ComparableVersionAdapter;
 import io.gitlab.jfronny.inceptum.model.ComparableVersion;
 import io.gitlab.jfronny.inceptum.model.inceptum.InceptumVersion;
 
+import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
+import java.net.URISyntaxException;
+import java.net.URL;
 import java.nio.file.Files;
 import java.nio.file.Path;
 
@@ -46,9 +49,15 @@ public class MetaHolder {
     }
 
     private static Path getDir() {
-        String p = MetaHolder.class.getProtectionDomain().getCodeSource().getLocation().getPath();
+        URL url = MetaHolder.class.getProtectionDomain().getCodeSource().getLocation();
+        String p = url.getPath();
         if (p.endsWith(".jar") && !p.endsWith("/build/libs/wrapper-" + VERSION.version + ".jar")) {
-            return Path.of(p).getParent();
+            try {
+                return new File(url.toURI()).toPath().getParent();
+            } catch (URISyntaxException e) {
+                e.printStackTrace();
+                return Path.of(".");
+            }
         } else {
             System.out.println("Not running in a jar, using ./run");
             return Path.of(".");