func copyFile()

in version_helper.go [110:140]

• 28 lines of code
• 9 McCabe index (conditional complexity)

func copyFile(src, dst string) error {
	cleanedSrc := filepath.Clean(src)
	cleanedDst := filepath.Clean(dst)
	if _, err := os.Stat(cleanedSrc); os.IsNotExist(err) {
		return fmt.Errorf("source file does not exist: %s", src)
	}

	dstDir := filepath.Dir(cleanedDst)
	if _, err := os.Stat(dstDir); os.IsNotExist(err) && os.MkdirAll(dstDir, 0750) != nil {
		return fmt.Errorf("failed to create destination folder: %s", dstDir)
	}
	if _, err := os.Stat(cleanedDst); !os.IsNotExist(err) && os.Remove(cleanedDst) != nil {
		return fmt.Errorf("failed to delete destination file: %s", dst)
	}
	srcFile, err := os.Open(cleanedSrc)
	if err != nil {
		return fmt.Errorf("failed to open source file: %s", src)
	}
	defer func() { _ = srcFile.Close() }()

	dstFile, err := os.Create(cleanedDst)
	if err != nil {
		return fmt.Errorf("failed to create destination file: %s", dst)
	}
	defer func() { _ = dstFile.Close() }()

	if _, err = io.Copy(dstFile, srcFile); err != nil {
		return fmt.Errorf("failed to copy file: %s", err)
	}
	return nil
}