promptly

A simple, opinionated prompting library

Features include:

• Re-prompt until valid
• Prompts for several types, and extensible
• Sane handling of escapes via rustyline
• Path completion when prompting for paths
• Dead simple to use. Perhaps too simple.

Usage

Simply call prompt or prompt_default to prompt for any Promptable type:

• prompt(msg) - prompt until input can be parsed as the inferred return type. Re-prompts if input is empty.
• prompt_opt(msg) - prompt until input can be parsed as the inferred return type. Returns None if input is empty.
• prompt_default(msg, default) - prompt until input can be parsed as the inferred return type. Uses default value if input is empty.

use promptly::{prompt, prompt_default, prompt_opt};

// Prompt until a non-empty string is provided
let name: String = prompt("Enter your name")?;

// Prompt for other `FromStr` types
let age: u32 = prompt("Enter your age")?;

// Prompt for optional paths with path completion. Returns `None` if empty input.
let photo: Option<PathBuf> = prompt_opt("Enter a path to a profile picture")?;

// Prompt Y/n with a default value when input is empty
let fallback = prompt_default("Would you like to receive marketing emails", true);

// Prompt for a url using the url crate (requires either 'nightly' or 'url' feature)
let website: Url = prompt("Enter a website URL");

More...

The API surface of this crate is opinionated and experimental, but open to fresh ideas.