refactor(gateway): split server runtime

src/gateway/server-tailscale.ts

@@ -0,0 +1,60 @@
+import {
+  disableTailscaleFunnel,
+  disableTailscaleServe,
+  enableTailscaleFunnel,
+  enableTailscaleServe,
+  getTailnetHostname,
+} from "../infra/tailscale.js";
+
+export async function startGatewayTailscaleExposure(params: {
+  tailscaleMode: "off" | "serve" | "funnel";
+  resetOnExit?: boolean;
+  port: number;
+  controlUiBasePath?: string;
+  logTailscale: { info: (msg: string) => void; warn: (msg: string) => void };
+}): Promise<(() => Promise<void>) | null> {
+  if (params.tailscaleMode === "off") {
+    return null;
+  }
+
+  try {
+    if (params.tailscaleMode === "serve") {
+      await enableTailscaleServe(params.port);
+    } else {
+      await enableTailscaleFunnel(params.port);
+    }
+    const host = await getTailnetHostname().catch(() => null);
+    if (host) {
+      const uiPath = params.controlUiBasePath
+        ? `${params.controlUiBasePath}/`
+        : "/";
+      params.logTailscale.info(
+        `${params.tailscaleMode} enabled: https://${host}${uiPath} (WS via wss://${host})`,
+      );
+    } else {
+      params.logTailscale.info(`${params.tailscaleMode} enabled`);
+    }
+  } catch (err) {
+    params.logTailscale.warn(
+      `${params.tailscaleMode} failed: ${err instanceof Error ? err.message : String(err)}`,
+    );
+  }
+
+  if (!params.resetOnExit) {
+    return null;
+  }
+
+  return async () => {
+    try {
+      if (params.tailscaleMode === "serve") {
+        await disableTailscaleServe();
+      } else {
+        await disableTailscaleFunnel();
+      }
+    } catch (err) {
+      params.logTailscale.warn(
+        `${params.tailscaleMode} cleanup failed: ${err instanceof Error ? err.message : String(err)}`,
+      );
+    }
+  };
+}