fix: print warn if user set watchOptions.ignored value as regexp type (#3286)

Author: 2heal1

.changeset/beige-terms-check.md

@@ -0,0 +1,5 @@
+---
+'@module-federation/modern-js': patch
+---
+
+fix: print warn if user set watchOptions.ignored value as regexp type

packages/modernjs/src/cli/utils.ts

@@ -241,29 +241,39 @@ export function patchBundlerConfig<T extends Bundler>(options: {
     bundlerConfig.watchOptions = bundlerConfig.watchOptions || {};
     if (!Array.isArray(bundlerConfig.watchOptions.ignored)) {
       if (bundlerConfig.watchOptions.ignored) {
-        bundlerConfig.watchOptions.ignored = [
-          bundlerConfig.watchOptions.ignored as string,
-        ];
+        if (typeof bundlerConfig.watchOptions.ignored !== 'string') {
+          logger.warn(
+            `Detect you have set watchOptions.ignore as regexp, please transform it to glob string array and add "**/@mf-types/**" to the array.`,
+          );
+        } else {
+          bundlerConfig.watchOptions.ignored = [
+            bundlerConfig.watchOptions.ignored,
+          ];
+        }
       } else {
         bundlerConfig.watchOptions.ignored = [];
       }
     }
-    if (mfConfig.dts !== false) {
-      if (
-        typeof mfConfig.dts === 'object' &&
-        typeof mfConfig.dts.consumeTypes === 'object' &&
-        mfConfig.dts.consumeTypes.remoteTypesFolder
-      ) {
-        bundlerConfig.watchOptions.ignored.push(
-          `**/${mfConfig.dts.consumeTypes.remoteTypesFolder}/**`,
-        );
+
+    if (Array.isArray(bundlerConfig.watchOptions.ignored)) {
+      if (mfConfig.dts !== false) {
+        if (
+          typeof mfConfig.dts === 'object' &&
+          typeof mfConfig.dts.consumeTypes === 'object' &&
+          mfConfig.dts.consumeTypes.remoteTypesFolder
+        ) {
+          bundlerConfig.watchOptions.ignored.push(
+            `**/${mfConfig.dts.consumeTypes.remoteTypesFolder}/**`,
+          );
+        } else {
+          bundlerConfig.watchOptions.ignored.push('**/@mf-types/**');
+        }
       } else {
         bundlerConfig.watchOptions.ignored.push('**/@mf-types/**');
       }
-    } else {
-      bundlerConfig.watchOptions.ignored.push('**/@mf-types/**');
     }
   }
+
   if (bundlerConfig.output) {
     if (!bundlerConfig.output?.chunkLoadingGlobal) {
       bundlerConfig.output.chunkLoadingGlobal = `chunk_${mfConfig.name}`;