use object::read::macho::DyldCache;
use object::Endianness;
use std::{env, fs, process};

fn main() {
    let arg_len = env::args().len();
    if arg_len <= 1 {
        eprintln!("Usage: {} <file> ...", env::args().next().unwrap());
        process::exit(1);
    }

    for file_path in env::args().skip(1) {
        if arg_len > 2 {
            println!();
            println!("{}:", file_path);
        }

        let file = match fs::File::open(&file_path) {
            Ok(file) => file,
            Err(err) => {
                println!("Failed to open file '{}': {}", file_path, err,);
                continue;
            }
        };
        let file = match unsafe { memmap2::Mmap::map(&file) } {
            Ok(mmap) => mmap,
            Err(err) => {
                println!("Failed to map file '{}': {}", file_path, err,);
                continue;
            }
        };
        let cache = match DyldCache::<Endianness>::parse(&*file) {
            Ok(cache) => cache,
            Err(err) => {
                println!(
                    "Failed to parse Dyld shared cache file '{}': {}",
                    file_path, err,
                );
                continue;
            }
        };

        // Print the list of image paths in this file.
        for image in cache.images() {
            if let Ok(path) = image.path() {
                println!("{}", path);
            }
        }
    }
}