func loadHistory(state *liner.State, historyFileName string) error {
//liner.HistoryLimit = 100 // to limit memory usage
user, err := user.Current()
if err != nil {
return err
}
path := path.Join(user.HomeDir, historyFileName)
f, err := os.Open(path)
if err != nil {
if os.IsNotExist(err) {
return nil
}
return err
}
defer f.Close()
r := bufio.NewReader(f)
_, err = state.ReadHistory(r)
return err
}
func saveHistory(state *liner.State, historyFileName string) error {
user, err := user.Current()
if err != nil {
return err
}
path := path.Join(user.HomeDir, historyFileName)
// append for multi-sessions handling
f, err := os.OpenFile(path, os.O_RDWR|os.O_APPEND|os.O_CREATE, 0600) // os.O_TRUNC
if err != nil {
return err
}
defer f.Close()
w := bufio.NewWriter(f)
_, err = state.WriteHistory(w)
if err != nil {
return err
}
err = w.Flush()
return err
}
func appendHistory(state *liner.State, item string) {
state.AppendHistory(item) // ignore consecutive dups, blank line, space
}