fix(NA): add normalizePath in order to fix watch optimizer when running on windows. (#26486)

src/optimize/watch/watch_cache.ts

@@ -25,6 +25,7 @@ import { promisify } from 'util';
 import del from 'del';
 import deleteEmpty from 'delete-empty';
 import globby from 'globby';
+import normalizePosixPath from 'normalize-path';
 
 const readAsync = promisify(readFile);
 const writeAsync = promisify(writeFile);
@@ -92,7 +93,15 @@ export class WatchCache {
 
     // delete everything in optimize/.cache directory
     // except ts-node
-    await del(await globby([this.cachePath, `!${this.cachePath}/ts-node/**`], { dot: true }));
+    await del(
+      await globby(
+        [
+          normalizePosixPath(this.cachePath),
+          `${normalizePosixPath(`!${this.cachePath}/ts-node/**`)}`,
+        ],
+        { dot: true }
+      )
+    );
 
     // delete some empty folder that could be left
     // from the previous cache path reset action

typings/normalize_path/index.d.ts

@@ -0,0 +1,24 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+declare function NormalizePath(path: string, stripTrailing?: boolean): string;
+
+declare module 'normalize-path' {
+  export = NormalizePath;
+}