how.rs/src/termination.rs

use std::process::{ExitCode, Termination};

use crate::How;

pub enum TerminationResult {
    Ok,
    Err(How),
}

impl Termination for TerminationResult {
    #[inline]
    fn report(self) -> ExitCode {
        match self {
            Self::Ok => ExitCode::SUCCESS,
            Self::Err(e) => {
                use std::io::Write;
                let _ = writeln!(
                    std::io::stderr(),
                    concat!("\n", ansee::styled!(bold, italic, "But, how?"), "\n{}"),
                    e
                );

                ExitCode::FAILURE
            }
        }
    }
}

impl From<Result<(), How>> for TerminationResult {
    #[inline]
    fn from(value: Result<(), How>) -> Self {
        match value {
            Ok(()) => Self::Ok,
            Err(e) => Self::Err(e),
        }
    }
}