fix: avoid file not found err when remove old offset file

- add check before remove offset file

Closes #221

internal/utils/files.go

@@ -41,7 +41,7 @@ func FileReadAll(path string) ([]byte, error) {
  return data, nil
 }
 
-func MakeFileIfNotExist(path string) error {
+func ensureDir(path string) error {
  info, err := os.Stat(path)
  if err != nil {
  if os.IsNotExist(err) {
@@ -56,7 +56,7 @@ func MakeFileIfNotExist(path string) error {
 }
 
 func WriteToFile(path string, data []byte) error {
- if err := MakeFileIfNotExist(filepath.Dir(path)); err != nil {
+ if err := ensureDir(filepath.Dir(path)); err != nil {
  return err
  }
  tmpFile, err := os.Create(path + ".tmp")
@@ -80,6 +80,10 @@ func WriteToFile(path string, data []byte) error {
  }
  CheckError(fmt.Sprintf("close %s", bakFile.Name()), bakFile.Close())
  }
- CheckError(fmt.Sprintf("remove %s", path), os.Remove(path))
+
+ _, err = os.Stat(path)
+ if err == nil {
+ CheckError(fmt.Sprintf("remove %s", path), os.Remove(path))
+ }
  return os.Rename(path+".tmp", path)
 }