autumn-cli 0.8.0

fn main() {
    println!("cargo:rerun-if-changed=src/");
    println!("cargo:rerun-if-changed=static/css/input.css");
    println!("cargo:rerun-if-changed=tailwind.config.js");

    let Some(tailwind) = find_tailwind_cli() else {
        println!(
            "cargo:warning=Tailwind CSS CLI not found — CSS will not be compiled. \
             Run `autumn setup` or install tailwindcss manually."
        );
        return;
    };

    let status = std::process::Command::new(&tailwind)
        .args([
            "-i",
            "static/css/input.css",
            "-o",
            "static/css/app.css",
            "--content",
            "src/**/*.rs",
            "--minify",
        ])
        .status()
        .expect("Failed to run Tailwind CLI");

    assert!(status.success(), "Tailwind CSS compilation failed");
}

fn find_tailwind_cli() -> Option<std::path::PathBuf> {
    // 1. Workspace target directory (populated by `autumn setup`). OUT_DIR is
    //    <target>/<profile>/build/<pkg>/out — walk up to <target>/autumn.
    if let Ok(out_dir) = std::env::var("OUT_DIR") {
        let out_path = std::path::PathBuf::from(out_dir);
        if let Some(target_dir) = out_path.ancestors().nth(4) {
            let bin_name = if cfg!(windows) {
                "tailwindcss.exe"
            } else {
                "tailwindcss"
            };
            let local = target_dir.join("autumn").join(bin_name);
            if local.exists() {
                return Some(local);
            }
        }
    }

    // 2. PATH
    which("tailwindcss")
}

fn which(binary: &str) -> Option<std::path::PathBuf> {
    let path_var = std::env::var_os("PATH")?;
    for dir in std::env::split_paths(&path_var) {
        let candidate = dir.join(binary);
        if candidate.exists() {
            return Some(candidate);
        }
        #[cfg(target_os = "windows")]
        {
            let candidate_exe = dir.join(format!("{binary}.exe"));
            if candidate_exe.exists() {
                return Some(candidate_exe);
            }
        }
    }
    None
}