car-parser 0.1.0

Rust parser for Apple .car asset catalog archives
Documentation 
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#[cfg(feature = "image")]
fn main() -> Result<(), Box<dyn std::error::Error>> {
    use std::env;
    use std::path::PathBuf;

    let mut args = env::args().skip(1);
    let path = args
        .next()
        .expect("usage: cargo run -p car-parser --features image --example export_png -- <file.car> <asset-name> <out.png>");
    let name = args.next().unwrap_or_else(|| "Image/png".to_string());
    let out = args
        .map(PathBuf::from)
        .next()
        .unwrap_or_else(|| "asset.png".into());

    let archive = car::Car::new(path)?;
    let variant = archive.best_variant_for_name(&name, &car::VariantQuery::new())?;
    let item = archive
        .item_with_key_values(&variant.key_values)
        .expect("variant should resolve to source item");

    if matches!(item.layout(), car::rendition::LayoutType::InternalReference) {
        let resolved = archive.try_resolve_internal_reference(item)?;
        car::image::save_image_with_crops(resolved.source, &out, &resolved.crops)?;
    } else {
        car::image::save_image(item, &out)?;
    }
    println!("wrote {}", out.display());

    Ok(())
}

#[cfg(not(feature = "image"))]
fn main() {
    eprintln!(
        "enable the `image` feature: cargo run -p car-parser --features image --example export_png -- <file.car>"
    );
}