GitHub - ergochat/readline: A readline implementation in pure Go

This is a pure Go implementation of functionality comparable to GNU Readline, i.e. line editing and command history for simple TUI programs.

It is a fork of chzyer/readline.

Relative to the upstream repository, it is actively maintained and has numerous bug fixes
- See our changelog for details on fixes and improvements
- See our migration guide for advice on how to migrate from upstream
Relative to x/term, it has more features (e.g. tab-completion)
In use by multiple projects: gopass, fq, and ircdog

package main

import (
	"fmt"
	"log"

	"github.com/ergochat/readline"
)

func main() {
	// see readline.NewFromConfig for advanced options:
	rl, err := readline.New("> ")
	if err != nil {
		log.Fatal(err)
	}
	defer rl.Close()
	log.SetOutput(rl.Stderr()) // redraw the prompt correctly after log output

	for {
		line, err := rl.ReadLine()
		// `err` is either nil, io.EOF, readline.ErrInterrupt, or an unexpected
		// condition in stdin:
		if err != nil {
			return
		}
		// `line` is returned without the terminating \n or CRLF:
		fmt.Fprintf(rl, "you wrote: %s\n", line)
	}
}