fix(ci): detect custom widget runtime chunks

scripts/check-custom-widget-bundle.spec.ts

@@ -1,6 +1,9 @@
 // @vitest-environment node
 
 import { spawnSync } from "node:child_process";
+import { mkdir, mkdtemp, rm, writeFile } from "node:fs/promises";
+import { tmpdir } from "node:os";
+import { dirname, join } from "node:path";
 import { describe, expect, test } from "vitest";
 
 describe("Custom Widget bundle budget", () => {
@@ -18,4 +21,37 @@ describe("Custom Widget bundle budget", () => {
       expect(result.stderr).not.toContain("Next.js build output is missing");
     },
   );
+
+  test("finds the dynamic module from its runtime chunk when server metadata is absent", async () => {
+    const nextRoot = await mkdtemp(join(tmpdir(), "homarr-custom-widget-bundle-"));
+    const serverChunk = join(nextRoot, "server/chunks/ssr/packages_widgets_src_custom-api_component_test.js");
+    const manifestPath = join(
+      nextRoot,
+      "standalone/apps/nextjs/.next/server/app/[locale]/(home)/(board)/page/react-loadable-manifest.json",
+    );
+    const runtimeChunk = join(nextRoot, "static/chunks/custom-widget-runtime.js");
+    try {
+      await Promise.all([
+        mkdir(dirname(serverChunk), { recursive: true }),
+        mkdir(dirname(manifestPath), { recursive: true }),
+        mkdir(dirname(runtimeChunk), { recursive: true }),
+      ]);
+      await Promise.all([
+        writeFile(serverChunk, "const generatedWithoutLoadableMetadata = true;"),
+        writeFile(runtimeChunk, 'const runtimeError = "RUNTIME_RENDER_ERROR";'),
+        writeFile(manifestPath, JSON.stringify({ 42: { id: 42, files: ["static/chunks/custom-widget-runtime.js"] } })),
+      ]);
+
+      const result = spawnSync(process.execPath, ["scripts/check-custom-widget-bundle.mjs"], {
+        cwd: process.cwd(),
+        encoding: "utf8",
+        env: { ...process.env, CUSTOM_WIDGET_NEXT_ROOT: nextRoot },
+      });
+
+      expect(result.status).toBe(0);
+      expect(result.stdout).toContain("Custom JSX bundle check passed");
+    } finally {
+      await rm(nextRoot, { force: true, recursive: true });
+    }
+  });
 });