feat: add update command to CLI, relay, and client

crates/server/src/api.rs

@@ -401,6 +401,91 @@ pub async fn clipboard_set(
     }
 }
 
+/// POST /relay/update — self-update the relay binary and restart the service
+pub async fn relay_update() -> impl IntoResponse {
+    tokio::spawn(async {
+        // Give the HTTP response time to be sent before we restart
+        tokio::time::sleep(Duration::from_millis(800)).await;
+
+        let url = "https://agent-helios.me/downloads/helios-remote/helios-remote-relay-linux";
+        let bytes = match reqwest::get(url).await {
+            Ok(r) => match r.bytes().await {
+                Ok(b) => b,
+                Err(e) => {
+                    error!("relay update: failed to read response body: {e}");
+                    return;
+                }
+            },
+            Err(e) => {
+                error!("relay update: download failed: {e}");
+                return;
+            }
+        };
+
+        let exe = match std::env::current_exe() {
+            Ok(p) => p,
+            Err(e) => {
+                error!("relay update: current_exe: {e}");
+                return;
+            }
+        };
+
+        let tmp = exe.with_extension("new");
+        if let Err(e) = std::fs::write(&tmp, &bytes) {
+            error!("relay update: write tmp failed: {e}");
+            return;
+        }
+
+        #[cfg(unix)]
+        {
+            use std::os::unix::fs::PermissionsExt;
+            let _ = std::fs::set_permissions(&tmp, std::fs::Permissions::from_mode(0o755));
+        }
+
+        if let Err(e) = std::fs::rename(&tmp, &exe) {
+            error!("relay update: rename failed: {e}");
+            return;
+        }
+
+        let _ = std::process::Command::new("systemctl")
+            .args(["restart", "helios-remote"])
+            .spawn();
+    });
+
+    (
+        axum::http::StatusCode::OK,
+        Json(serde_json::json!({ "ok": true, "message": "update triggered, relay restarting..." })),
+    )
+}
+
+/// POST /devices/:label/update — trigger client self-update
+pub async fn client_update(
+    Path(label): Path<String>,
+    State(state): State<AppState>,
+) -> impl IntoResponse {
+    match dispatch_with_timeout(&state, &label, "update", |rid| {
+        ServerMessage::UpdateRequest { request_id: rid }
+    }, Duration::from_secs(60)).await {
+        Ok(ClientMessage::UpdateResponse { success, message, .. }) => (
+            StatusCode::OK,
+            Json(serde_json::json!({ "success": success, "message": message })),
+        ).into_response(),
+        Ok(ClientMessage::Ack { .. }) => (
+            StatusCode::OK,
+            Json(serde_json::json!({ "success": true, "message": "update acknowledged" })),
+        ).into_response(),
+        Ok(ClientMessage::Error { message, .. }) => (
+            StatusCode::INTERNAL_SERVER_ERROR,
+            Json(serde_json::json!({ "success": false, "message": message })),
+        ).into_response(),
+        Ok(_) => (
+            StatusCode::OK,
+            Json(serde_json::json!({ "success": true, "message": "acknowledged" })),
+        ).into_response(),
+        Err(e) => e.into_response(),
+    }
+}
+
 /// POST /devices/:label/inform
 pub async fn inform_user(
     Path(label): Path<String>,