add customCudaFile support

backend-golang/file.go

@@ -3,6 +3,7 @@ package backend_golang
 import (
 	"encoding/json"
 	"fmt"
+	"io"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -92,6 +93,26 @@ func (a *App) DeleteFile(path string) error {
 	return nil
 }
 
+func (a *App) CopyFile(src string, dst string) error {
+	sourceFile, err := os.Open(src)
+	if err != nil {
+		return err
+	}
+	defer sourceFile.Close()
+
+	destFile, err := os.Create(dst)
+	if err != nil {
+		return err
+	}
+	defer destFile.Close()
+
+	_, err = io.Copy(sourceFile, destFile)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
 func (a *App) OpenFileFolder(path string) error {
 	absPath, err := filepath.Abs(path)
 	if err != nil {