restic/internal/selfupdate/download_windows.go

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//go:build windows
// +build windows
package selfupdate
import (
"fmt"
"os"
"path/filepath"
"github.com/restic/restic/internal/errors"
)
// Rename (rather than remove) the running version. The running binary will be locked
// on Windows and cannot be removed while still executing.
func removeResticBinary(dir, target string) error {
// nothing to do if the target does not exist
if _, err := os.Stat(target); errors.Is(err, os.ErrNotExist) {
return nil
}
backup := filepath.Join(dir, filepath.Base(target)+".bak")
if _, err := os.Stat(backup); err == nil {
_ = os.Remove(backup)
}
if err := os.Rename(target, backup); err != nil {
return fmt.Errorf("unable to rename target file: %v", err)
}
return nil
}