nicholaskh / go-gnureadline

Go bindings for GNU Readline

Go bindings to the GNU Readline library

This provides command-line entry, editing and command history

Synopsis

package main
import (
    "code.google.com/p/go-gnureadline"
    "fmt"
    "os"
)

const HISTORY_FILE string = "my.history"

func main() {
     var err error
     term := os.Getenv("TERM")
     gnureadline.ReadHistory(HISTORY_FILE)
     gnureadline.StifleHistory(10)  // Maximum 10 history entries
     gnureadline.ReadInitFile(".inputrc")  // Read in a keybinding initialization file
     line := ""
     for i:=1; err == nil && line != "quit"; i++ {
             line, err = gnureadline.Readline(fmt.Sprintf("Enter something [%d]: ", i), true)
             switch line {
                case "vi":
                        gnureadline.Rl_editing_mode_set(Vi)
                case "emacs":
                        gnureadline.Rl_editing_mode_set(Emacs)
                case "insert":
                        gnureadline.Rl_insert_mode_set(true)
                case "overwrite":
                        gnureadline.Rl_insert_mode_set(false)
                }
                fmt.Printf("You typed: %s\n", line)
     }
     fmt.Printf("History length %d\n",  gnureadline.HistoryLength())
     fmt.Printf("History max entries %d\n",  gnureadline.HistoryMaxEntries())
     gnureadline.WriteHistory(gnureadline.HISTORY_FILE)
     gnureadline.Rl_reset_terminal(term)
}

Description

readline will read a line from the terminal and return it, using prompt as a prompt. If prompt he empty string, no prompt is issued. The line returned has the final newline removed, so only the text of the line remains.

readline offers editing capabilities while the user is entering the line. By default, the line editing commands are similar to those of emacs. A vi-style line editing interface is also available.