feat: add relay:tmux:attach to join existing session

src/cli/program.ts

@@ -270,5 +270,18 @@ With Tailscale:
 			}
 		});
 
+	program
+		.command("relay:tmux:attach")
+		.description("Attach to the existing warelay-relay tmux session (no restart)")
+		.action(async () => {
+			try {
+				await spawnRelayTmux("pnpm warelay relay --verbose", true, false);
+				defaultRuntime.log(info("Attached to warelay-relay session."));
+			} catch (err) {
+				defaultRuntime.error(danger(`Failed to attach to warelay-relay: ${String(err)}`));
+				defaultRuntime.exit(1);
+			}
+		});
+
 	return program;
 }

src/cli/relay_tmux.ts

@@ -5,19 +5,22 @@ const SESSION = "warelay-relay";
 export async function spawnRelayTmux(
 	cmd = "pnpm warelay relay --verbose",
 	attach = true,
+	restart = true,
 ) {
-	await killSession(SESSION);
-	await new Promise<void>((resolve, reject) => {
-		const child = spawn("tmux", ["new", "-d", "-s", SESSION, cmd], {
-			stdio: "inherit",
-			shell: false,
+	if (restart) {
+		await killSession(SESSION);
+		await new Promise<void>((resolve, reject) => {
+			const child = spawn("tmux", ["new", "-d", "-s", SESSION, cmd], {
+				stdio: "inherit",
+				shell: false,
+			});
+			child.on("error", reject);
+			child.on("exit", (code) => {
+				if (code === 0) resolve();
+				else reject(new Error(`tmux exited with code ${code}`));
+			});
 		});
-		child.on("error", reject);
-		child.on("exit", (code) => {
-			if (code === 0) resolve();
-			else reject(new Error(`tmux exited with code ${code}`));
-		});
-	});
+	}
 
 	if (attach) {
 		await new Promise<void>((resolve, reject) => {