tyrol 0.0.1

🏔️ tyrol rolls up types into bundles
Documentation 
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use std::{env::VarError, error::Error, ffi::OsString};

use clap::Parser;
use rayon::iter::{IntoParallelIterator, ParallelIterator};
use tracing::info;
use tracing_error::ErrorLayer;
use tracing_subscriber::{EnvFilter, filter::FromEnvError, prelude::*};

use tyrol::Bundler;

#[derive(clap::Parser)]
#[command(about = "🏔️ tyrol rolls up types into bundles")]
struct Options {
    #[arg(value_name = "ENTRYPOINT", required = true)]
    entrypoints: Vec<OsString>,
}

fn main() -> color_eyre::Result<()> {
    setup_tracing()?;
    color_eyre::install()?;

    let opt = Options::parse();
    let bundler = Bundler::new(std::env::current_dir()?);

    let results = opt
        .entrypoints
        .into_par_iter()
        .map(|entrypoint| {
            info!("bundling types for {}", entrypoint.display());
            bundler.bundle(entrypoint)
        })
        .collect::<Vec<_>>();

    for result in results {
        result?;
    }

    Ok(())
}

fn setup_tracing() -> Result<(), FromEnvError> {
    let filter_layer = EnvFilter::try_from_default_env().or_else(|err| {
        fn as_env_error(err: &FromEnvError) -> Option<&VarError> {
            err.source()?.downcast_ref()
        }

        match as_env_error(&err) {
            Some(var_err) if matches!(var_err, VarError::NotPresent) => {
                Ok(EnvFilter::new("warn,tyrol=info"))
            }
            _ => Err(err),
        }
    })?;

    let fmt_layer = tracing_subscriber::fmt::layer().without_time();

    tracing_subscriber::registry()
        .with(filter_layer)
        .with(fmt_layer)
        .with(ErrorLayer::default())
        .init();

    Ok(())
}