Use ChatGPT's code

build.gradle.kts

@@ -1,11 +1,11 @@
 import org.gradle.api.JavaVersion
 import xyz.jpenilla.resourcefactory.bukkit.BukkitPluginYaml
+import java.io.IOException
 
 import java.nio.file.Files
 import java.nio.file.Paths
 import java.nio.file.StandardOpenOption
 import java.nio.file.NoSuchFileException
-import java.nio.file.StandardCopyOption
 
 plugins {
   java
@@ -181,9 +181,18 @@ tasks.register("renameProject") {
     replaceStringInFile(buildFilePath, "val mainProjectAuthor = \"$mainProjectAuthor\"", "val mainProjectAuthor = \"$newAuthorName\"")
     replaceStringInFile(buildFilePath, "val topLevelDomain = \"$topLevelDomain\"", "val topLevelDomain = \"$newTopLevelDomain\"")
 
-    Paths.get("$startPath/$currentGroupPath/$currentMainFileNameWithExtension").toFile().renameTo(
-      Paths.get("$startPath/$newGroupPath/$newMainFileNameWithExtension").toFile()
-    )
+    val currentMainFilePath = javaSourcePath.resolve(currentGroupPath).resolve(currentMainFileNameWithExtension)
+    val newMainFilePath = javaSourcePath.resolve(newGroupPath).resolve(newMainFileNameWithExtension)
+
+    try {
+      Files.move(currentMainFilePath.toPath(), newMainFilePath.toPath())
+      println("Renamed file successfully")
+    } catch (exception: IOException) {
+      exception.printStackTrace()
+      error("Failed to rename file")
+    }
+
+    // Ensure directories are renamed and other replacements are done similarly
 
     renamePackageDirectories("${javaSourcePathString}/${currentGroupPath}", "${javaSourcePathString}/${newGroupPath}")