pavex_cli_deps 0.1.69

An internal crate to share some dependency management logic between Pavex's CLIs, `pavex` and `pavexc`.
Documentation 
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use anyhow::{anyhow, Context};
use std::io::{BufRead, Write};

/// Prompt the user for confirmation.
pub fn confirm(question: &str, default: bool) -> Result<bool, anyhow::Error> {
    let hint = if default { "[Y/n]" } else { "[y/N]" };
    write!(std::io::stdout().lock(), "{question} {hint} ")?;
    let _ = std::io::stdout().flush();
    let input = read_line()?;

    let r = match &*input.to_lowercase() {
        "y" | "yes" => true,
        "n" | "no" => false,
        "" => default,
        _ => false,
    };

    writeln!(std::io::stdout().lock())?;

    Ok(r)
}

fn read_line() -> Result<String, anyhow::Error> {
    let stdin = std::io::stdin();
    let stdin = stdin.lock();
    let mut lines = stdin.lines();
    let lines = lines.next().transpose()?;
    match lines {
        None => Err(anyhow!("No lines found from stdin")),
        Some(v) => Ok(v),
    }
    .context("Unable to read from stdin for confirmation")
}