re
/
readline
forked from mirror/readline
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
readline/README.md

309 lines
18 KiB
Markdown
Raw Blame History

# readline
[![Software License](https://img.shields.io/badge/license-MIT-brightgreen.svg)](LICENSE.md)
[![Build Status](https://travis-ci.org/chzyer/readline.svg?branch=master)](https://travis-ci.org/chzyer/readline)
[![GoDoc](https://godoc.org/github.com/chzyer/readline?status.svg)](https://godoc.org/github.com/chzyer/readline)
[![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/chzyer/readline?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
[![OpenCollective](https://opencollective.com/readline/badge/backers.svg)](#backers)
[![OpenCollective](https://opencollective.com/readline/badge/sponsors.svg)](#sponsors)
Readline is A Pure Go Implementation of a libreadline-style Library.
The goal is to be a powerful alternater for GNU-Readline.
**WHY:**
Readline will support most of features which GNU Readline is supported, and provide a pure go environment and a MIT license.
It can also provides shell-like interactives by using [flagly](https://github.com/chzyer/flagly) (demo: [flagly-shell](https://github.com/chzyer/flagly/blob/master/demo/flagly-shell/flagly-shell.go))
# Demo
![demo](https://raw.githubusercontent.com/chzyer/readline/assets/demo.gif)
Also works fine in windows
![demo windows](https://raw.githubusercontent.com/chzyer/readline/assets/windows.gif)
* [example/readline-demo](https://github.com/chzyer/readline/blob/master/example/readline-demo/readline-demo.go) The source code about the demo above
* [example/readline-im](https://github.com/chzyer/readline/blob/master/example/readline-im/readline-im.go) Example for how to write a IM program.
* [example/readline-multiline](https://github.com/chzyer/readline/blob/master/example/readline-multiline/readline-multiline.go) Example for how to parse command which can submit by multiple time.
* [example/readline-pass-strength](https://github.com/chzyer/readline/blob/master/example/readline-pass-strength/readline-pass-strength.go) A example about checking password strength, written by [@sahib](https://github.com/sahib)
# Todo
* Vi Mode is not completely finish
* More funny examples
* Support dumb/eterm-color terminal in emacs
# Features
* Support emacs/vi mode, almost all basic features that GNU-Readline is supported
* zsh-style backward/forward history search
* zsh-style completion
* Readline auto refresh when others write to Stdout while editing (it needs specify the Stdout/Stderr provided by *readline.Instance to others).
* Support colourful prompt in all platforms.
# Usage
* Import package
```
go get gopkg.in/readline.v1
```
or
```
go get github.com/chzyer/readline
```
* Simplest example
```go
import "gopkg.in/readline.v1"
rl, err := readline.New("> ")
if err != nil {
panic(err)
}
defer rl.Close()
for {
line, err := rl.Readline()
if err != nil { // io.EOF, readline.ErrInterrupt
break
}
println(line)
}
```
* Example with durable history
```go
rl, err := readline.NewEx(&readline.Config{
Prompt: "> ",
HistoryFile: "/tmp/readline.tmp",
})
if err != nil {
panic(err)
}
defer rl.Close()
for {
line, err := rl.Readline()
if err != nil { // io.EOF, readline.ErrInterrupt
break
}
println(line)
}
```
* Example with auto completion
```go
import (
"gopkg.in/readline.v1"
)
var completer = readline.NewPrefixCompleter(
readline.PcItem("say",
readline.PcItem("hello"),
readline.PcItem("bye"),
),
readline.PcItem("help"),
)
rl, err := readline.NewEx(&readline.Config{
Prompt: "> ",
AutoComplete: completer,
})
if err != nil {
panic(err)
}
defer rl.Close()
for {
line, err := rl.Readline()
if err != nil { // io.EOF, readline.ErrInterrupt
break
}
println(line)
}
```
# Shortcut
`Meta`+`B` means press `Esc` and `n` separately.
Users can change that in terminal simulator(i.e. iTerm2) to `Alt`+`B`
Notice: `Meta`+`B` is equals with `Alt`+`B` in windows.
* Shortcut in normal mode
| Shortcut | Comment |
|--------------------|------------------------------------------|
| `Ctrl`+`A` | Beginning of line |
| `Ctrl`+`B` / `←` | Backward one character |
| `Meta`+`B` | Backward one word |
| `Ctrl`+`C` | Send io.EOF |
| `Ctrl`+`D` | Delete one character |
| `Meta`+`D` | Delete one word |
| `Ctrl`+`E` | End of line |
| `Ctrl`+`F` / `→` | Forward one character |
| `Meta`+`F` | Forward one word |
| `Ctrl`+`G` | Cancel |
| `Ctrl`+`H` | Delete previous character |
| `Ctrl`+`I` / `Tab` | Command line completion |
| `Ctrl`+`J` | Line feed |
| `Ctrl`+`K` | Cut text to the end of line |
| `Ctrl`+`L` | Clear screen |
| `Ctrl`+`M` | Same as Enter key |
| `Ctrl`+`N` / `↓` | Next line (in history) |
| `Ctrl`+`P` / `↑` | Prev line (in history) |
| `Ctrl`+`R` | Search backwards in history |
| `Ctrl`+`S` | Search forwards in history |
| `Ctrl`+`T` | Transpose characters |
| `Meta`+`T` | Transpose words (TODO) |
| `Ctrl`+`U` | Cut text to the beginning of line |
| `Ctrl`+`W` | Cut previous word |
| `Backspace` | Delete previous character |
| `Meta`+`Backspace` | Cut previous word |
| `Enter` | Line feed |
* Shortcut in Search Mode (`Ctrl`+`S` or `Ctrl`+`r` to enter this mode)
| Shortcut | Comment |
|-------------------------|---------------------------------------------|
| `Ctrl`+`S` | Search forwards in history |
| `Ctrl`+`R` | Search backwards in history |
| `Ctrl`+`C` / `Ctrl`+`G` | Exit Search Mode and revert the history |
| `Backspace` | Delete previous character |
| Other | Exit Search Mode |
* Shortcut in Complete Select Mode (double `Tab` to enter this mode)
| Shortcut | Comment |
|-------------------------|---------------------------------------------|
| `Ctrl`+`F` | Move Forward |
| `Ctrl`+`B` | Move Backward |
| `Ctrl`+`N` | Move to next line |
| `Ctrl`+`P` | Move to previous line |
| `Ctrl`+`A` | Move to the first candicate in current line |
| `Ctrl`+`E` | Move to the last candicate in current line |
| `Tab` / `Enter` | Use the word on cursor to complete |
| `Ctrl`+`C` / `Ctrl`+`G` | Exit Complete Select Mode |
| Other | Exit Complete Select Mode |
# Tested with
| Environment | $TERM |
|-------------------------------|--------|
| Mac OS X iTerm2 | xterm |
| Mac OS X default Terminal.app | xterm |
| Mac OS X iTerm2 Screen | screen |
| Mac OS X iTerm2 Tmux | screen |
| Ubuntu Server 14.04 LTS | linux |
| Centos 7 | linux |
| Windows 10 | - |
### Notice:
* `Ctrl`+`A` is not working in `screen` because it used as a control command by default
If you test it otherwhere, whether it works fine or not, please let me know!
## Who is using Readline
* [cockroachdb/cockroach](https://github.com/cockroachdb/cockroach)
* [remind101/empire](https://github.com/remind101/empire)
* [youtube/doorman](https://github.com/youtube/doorman)
* [bom-d-van/harp](https://github.com/bom-d-van/harp)
* [abiosoft/ishell](https://github.com/abiosoft/ishell)
* [robertkrimen/otto](https://github.com/robertkrimen/otto)
* [Netflix/hal-9001](https://github.com/Netflix/hal-9001)
* [docker/go-p9p](https://github.com/docker/go-p9p)
* [mehrdadrad/mylg](https://github.com/mehrdadrad/mylg)
# Feedback
If you have any questions, please submit a github issue and any pull requests is welcomed :)
* [https://twitter.com/chzyer](https://twitter.com/chzyer)
* [http://weibo.com/2145262190](http://weibo.com/2145262190)
# Backers
Love Readline? Help me keep it alive by donating funds to cover project expenses!<br />
[[Become a backer](https://opencollective.com/readline#backer)]
<a href="https://opencollective.com/readline/backer/0/website" target="_blank"><img src="https://opencollective.com/readline/backer/0/avatar.svg"></a>
<a href="https://opencollective.com/readline/backer/1/website" target="_blank"><img src="https://opencollective.com/readline/backer/1/avatar.svg"></a>
<a href="https://opencollective.com/readline/backer/2/website" target="_blank"><img src="https://opencollective.com/readline/backer/2/avatar.svg"></a>
<a href="https://opencollective.com/readline/backer/3/website" target="_blank"><img src="https://opencollective.com/readline/backer/3/avatar.svg"></a>
<a href="https://opencollective.com/readline/backer/4/website" target="_blank"><img src="https://opencollective.com/readline/backer/4/avatar.svg"></a>
<a href="https://opencollective.com/readline/backer/5/website" target="_blank"><img src="https://opencollective.com/readline/backer/5/avatar.svg"></a>
<a href="https://opencollective.com/readline/backer/6/website" target="_blank"><img src="https://opencollective.com/readline/backer/6/avatar.svg"></a>
<a href="https://opencollective.com/readline/backer/7/website" target="_blank"><img src="https://opencollective.com/readline/backer/7/avatar.svg"></a>
<a href="https://opencollective.com/readline/backer/8/website" target="_blank"><img src="https://opencollective.com/readline/backer/8/avatar.svg"></a>
<a href="https://opencollective.com/readline/backer/9/website" target="_blank"><img src="https://opencollective.com/readline/backer/9/avatar.svg"></a>
<a href="https://opencollective.com/readline/backer/10/website" target="_blank"><img src="https://opencollective.com/readline/backer/10/avatar.svg"></a>
<a href="https://opencollective.com/readline/backer/11/website" target="_blank"><img src="https://opencollective.com/readline/backer/11/avatar.svg"></a>
<a href="https://opencollective.com/readline/backer/12/website" target="_blank"><img src="https://opencollective.com/readline/backer/12/avatar.svg"></a>
<a href="https://opencollective.com/readline/backer/13/website" target="_blank"><img src="https://opencollective.com/readline/backer/13/avatar.svg"></a>
<a href="https://opencollective.com/readline/backer/14/website" target="_blank"><img src="https://opencollective.com/readline/backer/14/avatar.svg"></a>
<a href="https://opencollective.com/readline/backer/15/website" target="_blank"><img src="https://opencollective.com/readline/backer/15/avatar.svg"></a>
<a href="https://opencollective.com/readline/backer/16/website" target="_blank"><img src="https://opencollective.com/readline/backer/16/avatar.svg"></a>
<a href="https://opencollective.com/readline/backer/17/website" target="_blank"><img src="https://opencollective.com/readline/backer/17/avatar.svg"></a>
<a href="https://opencollective.com/readline/backer/18/website" target="_blank"><img src="https://opencollective.com/readline/backer/18/avatar.svg"></a>
<a href="https://opencollective.com/readline/backer/19/website" target="_blank"><img src="https://opencollective.com/readline/backer/19/avatar.svg"></a>
<a href="https://opencollective.com/readline/backer/20/website" target="_blank"><img src="https://opencollective.com/readline/backer/20/avatar.svg"></a>
<a href="https://opencollective.com/readline/backer/21/website" target="_blank"><img src="https://opencollective.com/readline/backer/21/avatar.svg"></a>
<a href="https://opencollective.com/readline/backer/22/website" target="_blank"><img src="https://opencollective.com/readline/backer/22/avatar.svg"></a>
<a href="https://opencollective.com/readline/backer/23/website" target="_blank"><img src="https://opencollective.com/readline/backer/23/avatar.svg"></a>
<a href="https://opencollective.com/readline/backer/24/website" target="_blank"><img src="https://opencollective.com/readline/backer/24/avatar.svg"></a>
<a href="https://opencollective.com/readline/backer/25/website" target="_blank"><img src="https://opencollective.com/readline/backer/25/avatar.svg"></a>
<a href="https://opencollective.com/readline/backer/26/website" target="_blank"><img src="https://opencollective.com/readline/backer/26/avatar.svg"></a>
<a href="https://opencollective.com/readline/backer/27/website" target="_blank"><img src="https://opencollective.com/readline/backer/27/avatar.svg"></a>
<a href="https://opencollective.com/readline/backer/28/website" target="_blank"><img src="https://opencollective.com/readline/backer/28/avatar.svg"></a>
<a href="https://opencollective.com/readline/backer/29/website" target="_blank"><img src="https://opencollective.com/readline/backer/29/avatar.svg"></a>
# Sponsors
Become a sponsor and get your logo here on our Github page. [[Become a sponsor](https://opencollective.com/readline#sponsor)]
<a href="https://opencollective.com/readline/sponsor/0/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/0/avatar.svg"></a>
<a href="https://opencollective.com/readline/sponsor/1/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/1/avatar.svg"></a>
<a href="https://opencollective.com/readline/sponsor/2/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/2/avatar.svg"></a>
<a href="https://opencollective.com/readline/sponsor/3/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/3/avatar.svg"></a>
<a href="https://opencollective.com/readline/sponsor/4/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/4/avatar.svg"></a>
<a href="https://opencollective.com/readline/sponsor/5/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/5/avatar.svg"></a>
<a href="https://opencollective.com/readline/sponsor/6/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/6/avatar.svg"></a>
<a href="https://opencollective.com/readline/sponsor/7/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/7/avatar.svg"></a>
<a href="https://opencollective.com/readline/sponsor/8/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/8/avatar.svg"></a>
<a href="https://opencollective.com/readline/sponsor/9/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/9/avatar.svg"></a>
<a href="https://opencollective.com/readline/sponsor/10/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/10/avatar.svg"></a>
<a href="https://opencollective.com/readline/sponsor/11/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/11/avatar.svg"></a>
<a href="https://opencollective.com/readline/sponsor/12/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/12/avatar.svg"></a>
<a href="https://opencollective.com/readline/sponsor/13/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/13/avatar.svg"></a>
<a href="https://opencollective.com/readline/sponsor/14/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/14/avatar.svg"></a>
<a href="https://opencollective.com/readline/sponsor/15/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/15/avatar.svg"></a>
<a href="https://opencollective.com/readline/sponsor/16/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/16/avatar.svg"></a>
<a href="https://opencollective.com/readline/sponsor/17/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/17/avatar.svg"></a>
<a href="https://opencollective.com/readline/sponsor/18/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/18/avatar.svg"></a>
<a href="https://opencollective.com/readline/sponsor/19/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/19/avatar.svg"></a>
<a href="https://opencollective.com/readline/sponsor/20/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/20/avatar.svg"></a>
<a href="https://opencollective.com/readline/sponsor/21/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/21/avatar.svg"></a>
<a href="https://opencollective.com/readline/sponsor/22/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/22/avatar.svg"></a>
<a href="https://opencollective.com/readline/sponsor/23/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/23/avatar.svg"></a>
<a href="https://opencollective.com/readline/sponsor/24/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/24/avatar.svg"></a>
<a href="https://opencollective.com/readline/sponsor/25/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/25/avatar.svg"></a>
<a href="https://opencollective.com/readline/sponsor/26/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/26/avatar.svg"></a>
<a href="https://opencollective.com/readline/sponsor/27/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/27/avatar.svg"></a>
<a href="https://opencollective.com/readline/sponsor/28/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/28/avatar.svg"></a>
<a href="https://opencollective.com/readline/sponsor/29/website" target="_blank"><img src="https://opencollective.com/readline/sponsor/29/avatar.svg"></a>
Reference in New Issue View Git Blame Copy Permalink