Better-defined root directory.

- If running from a JAR, the root directory will be the same directory as the JAR (not where it was launched).
- Otherwise, use the current working directory.
- XDG unaffected.

Signed-off-by: Jeffrey Han <itdelatrisu@gmail.com>

src/itdelatrisu/opsu/Utils.java

@@ -41,6 +41,7 @@ import java.net.SocketTimeoutException;
 import java.net.URISyntaxException;
 import java.net.URL;
 import java.nio.ByteBuffer;
+import java.nio.file.Paths;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 import java.security.cert.X509Certificate;
@@ -541,6 +542,14 @@ public class Utils {
 		}
 	}
 
+	/**
+	 * Returns the current working directory.
+	 * @return the directory
+	 */
+	public static File getWorkingDirectory() {
+		return Paths.get(".").toAbsolutePath().normalize().toFile();
+	}
+
 	/**
 	 * Parses the integer string argument as a boolean:
 	 * {@code 1} is {@code true}, and all other values are {@code false}.