use std::{env, fs, path::PathBuf};
fn main() {
    let root = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap())
        .parent()
        .unwrap()
        .to_path_buf();
    let mut bytes = Vec::new();
    for (index, path) in [
        "os-context-switch/src/context.rs",
        "scripts/os-acceptance/k1040-context-handoff.rs",
        "scripts/os-acceptance/k1040-context-completion.rs",
    ]
    .iter()
    .enumerate()
    {
        let path = root.join(path);
        println!("cargo:rerun-if-changed={}", path.display());
        if index != 0 {
            bytes.extend_from_slice(b"\n");
        }
        bytes.extend_from_slice(&fs::read(path).unwrap());
    }
    let out = PathBuf::from(env::var("OUT_DIR").unwrap());
    let output = out.join("context.rs");
    fs::write(&output, bytes).unwrap();
    fs::write(
        out.join("module.rs"),
        format!(
            "#[path = {:?}] pub mod context;\n",
            output.to_str().unwrap()
        ),
    )
    .unwrap();
}