Merge pull request #531 from ngdangtu-vn/core/log-msg

add log msg on missing Site instance

CHANGELOG.md

@@ -6,6 +6,9 @@ and this project try to adheres to [Semantic Versioning](https://semver.org/).
 Go to the `v1` branch to see the changelog of Lume 1.
 
 ## [2.0.3] - Unreleased
+### Added
+- add critical log on rare case where developer forget to export the Site instance in the `_config.ts`
+
 ### Changed
 - `decap_cms` plugin: Add a script in the homepage to redirect to /admin/
   when an invite token or recovery token is detected from netlify identity.

cli/run.ts

@@ -48,6 +48,12 @@ export async function createSite(config?: string): Promise<Site> {
   if (url) {
     log.info(`Loading config file <dim>${url}</dim>`);
     const mod = await import(url);
+    if (!mod.default) {
+      log.critical(
+        `[Lume] Missing Site instance! Ensure your config file does export the Site instance as default.`,
+      );
+      throw new Error("Site instance is not found");
+    }
     return mod.default;
   }