peerman 0.2.1

DN42 peer manager with WireGuard, BIRD, and cluster support
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use std::path::Path;
use std::process::Command;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    // Only re-run if these files change
    println!("cargo:rerun-if-changed=proto/peerman.proto");
    println!("cargo:rerun-if-changed=build.rs");
    println!("cargo:rerun-if-changed=frontend/src");
    println!("cargo:rerun-if-changed=frontend/package.json");
    println!("cargo:rerun-if-changed=frontend/vite.config.ts");

    // 1. Compile proto → Rust (tonic + prost)
    tonic_build::configure()
        .build_server(true)
        .build_client(true)
        .compile_protos(&["proto/peerman.proto"], &["proto"])?;

    // 2. Build frontend if dist/ doesn't exist
    let frontend_dir = Path::new("frontend");
    let dist_dir = frontend_dir.join("dist");

    if std::env::var("SKIP_FRONTEND_BUILD").is_ok() {
        println!("cargo:warning=SKIP_FRONTEND_BUILD set, skipping frontend build");
        return Ok(());
    }

    if dist_dir.exists() {
        println!("cargo:warning=frontend/dist/ already exists, skipping frontend build");
        return Ok(());
    }

    if !frontend_dir.join("package.json").exists() {
        println!("cargo:warning=No frontend/package.json found, skipping frontend build");
        return Ok(());
    }

    println!("cargo:warning=frontend/dist/ missing, building frontend...");

    // Install dependencies
    let install = Command::new("pnpm")
        .args(["install", "--frozen-lockfile"])
        .current_dir(frontend_dir)
        .status();
    if install.is_err() {
        panic!(
            "pnpm not available and frontend/dist/ does not exist. Install pnpm or run: cd frontend && pnpm install && pnpm run build"
        );
    }

    // Build
    let status = Command::new("pnpm")
        .args(["run", "build"])
        .current_dir(frontend_dir)
        .status();

    match status {
        Ok(s) if s.success() => println!("cargo:warning=Frontend build succeeded"),
        Ok(s) => panic!("Frontend build failed with exit code: {:?}", s.code()),
        Err(_) => panic!("pnpm build command failed"),
    }

    Ok(())
}