Initial boilerplate scaffold for continuum-proxy

src/go2rtc.rs

@@ -0,0 +1,33 @@
+use std::process::Stdio;
+use std::time::Duration;
+
+use tokio::process::Command;
+use tracing::{error, info, warn};
+
+/// Supervises the go2rtc subprocess used for camera restreaming (RTSP/USB -> WebRTC).
+/// Restarts it with a fixed backoff whenever it exits, for as long as the daemon runs.
+pub async fn watchdog(bin: String, config_path: String) {
+    loop {
+        info!(%bin, %config_path, "starting go2rtc");
+
+        let spawned = Command::new(&bin)
+            .arg("-config")
+            .arg(&config_path)
+            .stdout(Stdio::null())
+            .stderr(Stdio::inherit())
+            .kill_on_drop(true)
+            .spawn();
+
+        match spawned {
+            Ok(mut child) => match child.wait().await {
+                Ok(status) => warn!(%status, "go2rtc exited, restarting after backoff"),
+                Err(err) => error!(?err, "failed to wait on go2rtc process"),
+            },
+            Err(err) => {
+                error!(?err, "failed to spawn go2rtc, is it installed and on PATH?");
+            }
+        }
+
+        tokio::time::sleep(Duration::from_secs(5)).await;
+    }
+}