chore: Separate daemon, client, server, and lib into crates

1 files changed, 86 insertions, 0 deletions

diff --git a/crates/server/src/lib.rs b/crates/server/src/lib.rs
new file mode 100644
index 00000000..a4b10acf
--- /dev/null
+++ b/crates/server/src/lib.rs
@@ -0,0 +1,86 @@
+use std::future::Future;
+use std::net::SocketAddr;
+
+use axum::{Router, serve};
+use database::db::ServerPostgres;
+use eyre::{Context, Result};
+
+pub(crate) mod database;
+mod handlers;
+mod metrics;
+mod router;
+
+pub(crate) use settings::Settings;
+
+pub(crate) mod settings;
+
+use tokio::net::TcpListener;
+use tokio::signal;
+
+#[cfg(target_family = "unix")]
+async fn shutdown_signal() {
+    let mut term = signal::unix::signal(signal::unix::SignalKind::terminate())
+        .expect("failed to register signal handler");
+    let mut interrupt = signal::unix::signal(signal::unix::SignalKind::interrupt())
+        .expect("failed to register signal handler");
+
+    tokio::select! {
+        _ = term.recv() => {},
+        _ = interrupt.recv() => {},
+    };
+    eprintln!("Shutting down gracefully...");
+}
+
+pub(crate) async fn launch(settings: Settings, addr: SocketAddr) -> Result<()> {
+    launch_with_tcp_listener(
+        settings,
+        TcpListener::bind(addr)
+            .await
+            .context("could not connect to socket")?,
+        shutdown_signal(),
+    )
+    .await
+}
+
+pub(crate) async fn launch_with_tcp_listener(
+    settings: Settings,
+    listener: TcpListener,
+    shutdown: impl Future<Output = ()> + Send + 'static,
+) -> Result<()> {
+    let r = make_router(settings).await?;
+
+    serve(listener, r.into_make_service())
+        .with_graceful_shutdown(shutdown)
+        .await?;
+
+    Ok(())
+}
+
+// The separate listener means it's much easier to ensure metrics are not accidentally exposed to
+// the public.
+pub(crate) async fn launch_metrics_server(host: String, port: u16) -> Result<()> {
+    let listener = TcpListener::bind((host, port))
+        .await
+        .context("failed to bind metrics tcp")?;
+
+    let recorder_handle = metrics::setup_metrics_recorder();
+
+    let router = Router::new().route(
+        "/metrics",
+        axum::routing::get(move || std::future::ready(recorder_handle.render())),
+    );
+
+    serve(listener, router.into_make_service())
+        .with_graceful_shutdown(shutdown_signal())
+        .await?;
+
+    Ok(())
+}
+
+async fn make_router(settings: Settings) -> Result<Router, eyre::Error> {
+    let db = ServerPostgres::new(&settings.db_settings)
+        .await
+        .wrap_err_with(|| format!("failed to connect to db: {:?}", settings.db_settings))?;
+    let r = router::router(db, settings);
+    Ok(r)
+}