use std::env;
use std::fs::File;
use std::io::Write;
use std::path::PathBuf;
use std::process::Command;

fn main() {
    let out = PathBuf::from(env::var("OUT_DIR").unwrap());
    let handle = Command::new("flatc")
        .args(&[
            "--rust",
            "-o",
            out.to_str().unwrap(),
            "flatbuffers/messages.fbs",
        ])
        .spawn()
        .expect("flatc failed");

    let output = handle.wait_with_output().unwrap();
    assert!(
        output.status.success(),
        "{}",
        String::from_utf8_lossy(&output.stdout)
    );

    // HACK: workaround for issue #18810/#18849
    // See: https://hclarke.ca/generated-code-in-rust.html

    let wrapper_path = out.join("messages_generated.mod");
    let mod_path = out.join("messages_generated.rs");

    let mut f = File::create(wrapper_path).unwrap();

    write!(
        f,
        "#[allow(clippy::all, warnings)]\n#[path = \"{}\"]\npub mod messages_generated;\npub use messages_generated::generated;",

        mod_path.to_string_lossy()
    )
    .expect("flatc mod failed");
}