+// copyFile copies a file from src to dst. If dst does not exist, it is created.
+func copyFile(src, dst string) error {
+ sourceFile, err := os.Open(src)
+ if err != nil {
+ return err
+ }
+ defer sourceFile.Close()
+
+ destinationFile, err := os.Create(dst)
+ if err != nil {
+ return err
+ }
+ defer destinationFile.Close()
+
+ _, err = io.Copy(destinationFile, sourceFile)
+ return err
+}
+
+// copyDir recursively copies a directory tree, attempting to preserve permissions.