challenge-prompt

challenge-prompt makes the user pause before doing something dangerous.

Command line tool

Install:

$ cargo install challenge-prompt # with cargo $ nix profile install 'git+https://gitlab.com/abstract-binary/challenge-prompt' # with nix

Run:

$ challenge-prompt Solve: (5 + 15) mod 5 = ?

Usage

``` Usage: challenge-prompt [-a] [-p] [--phrase ] [-y] [-v] [--retries ]

Make the user pause before doing something dangerous.

Options: -a, --arithmetic prompt the user to solve a simple arithmetic problem (default challenge) -p, --mistake prompt the user to type in "I am probably making a mistake." --phrase prompt the user to type in exactly the given phrase -y, --yes prompt the user to type in 'y' or 'yes' -v, --version print version information --retries how many retries to allow before failing (default: 1) --help display usage information

Notes: Set environment variable CHALLENGEPROMPTSEED to an u32 to fix the RNG seed.

Error codes: 0 User passed the challenge. 1 User failed the challenge or an error was encountered. ```

Library example

Add this to your Cargo.toml:

[dependencies]
challenge-prompt = "0.3"

and this to your crate root:

rust extern crate challenge_prompt;

Basic example:

```rust extern crate challenge_prompt;

let mut rng = challengeprompt::Rng::newfromtime().unwrap(); if !challengeprompt::Challenge::Arithmetic.prompt(&mut rng) { panic!("user failed the challenge") } ```