Upload files to "src/utils"

src/utils/daemon.ts

@@ -0,0 +1,45 @@
+import { releaseLock } from "./lock";
+import { logUtil } from "./logger";
+
+/**
+ * Daemonize the current process: spawns a detached child and exits the parent.
+ *
+ * When __IS_DAEMON is already set this is a no-op (the child continues).
+ * Otherwise the parent releases its lock, spawns the child via Bun.spawn,
+ * unrefs it so the child outlives the parent, and exits once the child
+ * process is confirmed running (polls PID existence, 1s max).
+ */
+export function daemonize(): void {
+  if (process.env["__IS_DAEMON"]) return; // child — keep running
+
+  releaseLock();
+
+  const child = Bun.spawn({
+    cmd: [process.execPath, ...process.argv.slice(1)],
+    stdout: "ignore",
+    stderr: "ignore",
+    stdin: "ignore",
+    env: { ...process.env, __IS_DAEMON: "1" },
+    cwd: process.cwd(),
+  });
+
+  child.unref();
+
+  logUtil.log(`Backgrounded with PID ${child.pid}`);
+
+  // Poll until the child process actually exists, then exit the parent.
+  // Falls back to a hard exit after 1 second in case the child fails to start.
+  const start = Date.now();
+  const poll = setInterval(() => {
+    try {
+      process.kill(child.pid, 0); // signal 0 = existence check only
+      clearInterval(poll);
+      process.exit(0);
+    } catch {
+      if (Date.now() - start > 1000) {
+        clearInterval(poll);
+        process.exit(0);
+      }
+    }
+  }, 50);
+}