rucline

Rucline (Rust CLI line /rɪˈklaɪn/) is a cross-platform, UTF-8 aware, advanced edtigin, autocompletion capable, tab suggestion supporting line reader you can "recline" on.

It provides advanced editing actions for user input and customization of the line reader.

It uses crossterm as a backend to provide cross-platform support, and provides advanced

Basic usage:

use rucline::completion;
use rucline::Prompt;

if let Ok(Some(string)) = Prompt::new()
    // Create a bold prompt
    .prompt("What's you favorite website? ")
    // Add some likely values as completions
    .completer(completion::Basic::new(&[
        "https://www.rust-lang.org/",
        "https://docs.rs/",
        "https://crates.io/",
    ]))
    // Add some tab completions
    .suggester(completion::Basic::new(&[
        "https://www.startpage.com/",
        "https://www.google.com/",
    ]))
    //Block until value is ready
    .read_line()
{
    println!("'{}' seems to be your favorite website", string);
}

Actions

Rucline allow advanced actions for interacting with the Prompt, but it comes built-in with useful behavior. For example, a few of the build-ins:

• Tab: cycle through completions
• Shift + Tab: cycle through completions in reverse
• CTRL + W: delete the current work
• CTRL + J: delete the beginning of the word
• CTRL + K: delete the end of the word
• CTRL + U: delete the line
• CTRL + H: delete the beggining of the line
• CTRL + L: delete the end of the line

See Action for the full default behavior

The behavior can be customized by overriding user events with actions. Which in turn can be serialized, stored, and loaded at run-time.

Overriding key bindings

use rucline::{completion, Prompt};
use rucline::key_bindings::{Action, Event, KeyBindings, Range};
use crossterm::event::KeyCode;

let mut bindings = KeyBindings::new();

// Accept the full suggestions if `right` is pressed
bindings.insert(Event::from(KeyCode::Right), Action::Complete(Range::Line));

if let Ok(Some(string)) = Prompt::new()
    // Create a bold prompt
    .prompt("What's you favorite website? ")
    // Add some likely values as completions
    .completer(completion::Basic::new(&[
        "https://www.rust-lang.org/",
        "https://docs.rs/",
        "https://crates.io/",
    ]))
    // Override the `right` key to always fill the full suggestions line
    .bindings(bindings)
    //Block until value is ready
    .read_line()
{
    println!("'{}' seems to be your favorite website", string);
}