history.go

package main

import (
    "bufio"
    "os"
    "github.com/prataprc/liner"
    "github.com/prataprc/cbsh/api"
)

func LoadHistory(c *api.Context) {
    historyFile := c.Cursh.HistoryFile()
    ReadHistoryFromFile(c.Liner, historyFile)
}

func UpdateHistory(c *api.Context, line string) {
    c.Liner.AppendHistory(line)
    WriteHistoryToFile(c.Liner, c.Cursh.HistoryFile())
}

func WriteHistoryToFile(liner *liner.State, path string) (err error) {
    f, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0600)
    if err != nil {
        return err
    }
    defer f.Close()

    writer := bufio.NewWriter(f)
    if _, err = liner.WriteHistory(writer); err == nil {
        writer.Flush()
    }
    return
}

func ReadHistoryFromFile(liner *liner.State, path string) error {
    if f, err := os.Open(path); err != nil {
        return err
    } else {
        defer f.Close()
        reader := bufio.NewReader(f)
        liner.ReadHistory(reader)
    }
    return nil
}