RustyLine

Readline implementation in Rust that is based on Antirez' Linenoise

Supported Platforms

• Unix (tested on FreeBSD, Linux and macOS)
• Windows
  • cmd.exe
  • Powershell

Note:

• Powershell ISE is not supported, check issue #56
• Mintty (Cygwin/MinGW) is not supported
• Highlighting / Colors are not supported on Windows < Windows 10 except with ConEmu and ColorMode::Forced.

Example

use rustyline::error::ReadlineError;
use rustyline::Editor;

fn main() {
    // `()` can be used when no completer is required
    let mut rl = Editor::<()>::new();
    if rl.load_history("history.txt").is_err() {
        println!("No previous history.");
    }
    loop {
        let readline = rl.readline(">> ");
        match readline {
            Ok(line) => {
                rl.add_history_entry(line.as_str());
                println!("Line: {}", line);
            },
            Err(ReadlineError::Interrupted) => {
                println!("CTRL-C");
                break
            },
            Err(ReadlineError::Eof) => {
                println!("CTRL-D");
                break
            },
            Err(err) => {
                println!("Error: {:?}", err);
                break
            }
        }
    }
    rl.save_history("history.txt").unwrap();
}

crates.io

You can use this package in your project by adding the following to your Cargo.toml:

[dependencies]
rustyline = "6.3.0"

Features

• Unicode (UTF-8) (linenoise supports only ASCII)
• Word completion (linenoise supports only line completion)
• Filename completion
• History search (Searching for Commands in the History)
• Kill ring (Killing Commands)
• Multi line support (line wrapping)
• Word commands
• Hints

Actions

For all modes:

Emacs mode (default mode)

Readline Emacs Editing Mode Cheat Sheet

vi command mode

vi insert mode

Readline vi Editing Mode Cheat Sheet

Terminal codes (ANSI/VT100)

Wine

$ cargo run --example example --target 'x86_64-pc-windows-gnu'
...
Error: Io(Error { repr: Os { code: 6, message: "Invalid handle." } })
$ wineconsole --backend=curses target/x86_64-pc-windows-gnu/debug/examples/example.exe
...

Terminal checks

$ # current settings of all terminal attributes:
$ stty -a
$ # key bindings:
$ bind -p
$ # print out a terminfo description:
$ infocmp

Similar projects

Multi line support

This is a very simple feature that simply causes lines that are longer than the current terminal width to be displayed on the next visual line instead of horizontally scrolling as more characters are typed. Currently this feature is always enabled and there is no configuration option to disable it.

This feature does not allow the end user to hit a special key sequence and enter a mode where hitting the return key will cause a literal newline to be added to the input buffer.

The way to achieve multi-line editing is to implement the Validator trait.