build: update dependency chokidar to v6

See associated pull request for more information.

Closes #34464 as a pr takeover

Author: angular-robot

packages/angular/build/package.json

@@ -26,7 +26,7 @@
     "@vitejs/plugin-basic-ssl": "2.3.0",
     "beasties": "0.5.5",
     "browserslist": "^4.26.0",
-    "chokidar": "5.0.0",
+    "chokidar": "6.0.0",
     "esbuild": "0.28.2",
     "https-proxy-agent": "9.1.0",
     "jsonc-parser": "3.3.1",

packages/angular/build/src/utils/watcher.ts

@@ -219,16 +219,20 @@ export function getDirectoryPath(posixPath: string): string {
   return dir;
 }
 
+function isNodeModulesSegment(lookupKey: string): boolean {
+  return lookupKey === NODE_MODULES || lookupKey.endsWith(`/${NODE_MODULES}`);
+}
+
 /**
  * Determines whether a file path lookup key or any of its parent directories are present in watchedFiles.
  */
-function isPathWatched(fileLookupKey: string, watchedFiles: Set<string>): boolean {
+function isPathWatched(fileLookupKey: string, watchedFiles: ReadonlySet<string>): boolean {
   if (watchedFiles.has(fileLookupKey)) {
     return true;
   }
 
   let current = fileLookupKey;
-  while (true) {
+  while (!isNodeModulesSegment(current)) {
     const parent = getDirectoryPath(current);
     if (parent === current) {
       break;
@@ -1111,8 +1115,8 @@ function createChokidarIgnored(
       }) ?? [];
 
   // When watching a directory (e.g. projectRoot via NG_BUILD_WATCH_ROOT), prune `node_modules`
-  // directories unless explicitly added to `watchedFiles`. Explicitly added files inside
-  // `node_modules` do not end with `/node_modules` and remain watchable.
+  // directories and any unwatched descendants inside `node_modules` (since Chokidar 6 keeps
+  // ancestor directories of explicitly watched package files un-ignored to traverse to them).
   return [
     ...customIgnored,
     (filePath: string) => {
@@ -1122,11 +1126,15 @@ function createChokidarIgnored(
 
       const posixPath = toPosixPathNormalized(filePath);
       const lookupKey = toLookupKey(posixPath, isCaseSensitive);
+      if (
+        !isNodeModulesSegment(lookupKey) &&
+        !lookupKey.includes(`/${NODE_MODULES}/`) &&
+        !lookupKey.startsWith(`${NODE_MODULES}/`)
+      ) {
+        return false;
+      }
 
-      return (
-        (lookupKey === NODE_MODULES || lookupKey.endsWith(`/${NODE_MODULES}`)) &&
-        !watchedFiles.has(lookupKey)
-      );
+      return !isPathWatched(lookupKey, watchedFiles);
     },
   ];
 }

packages/angular_devkit/core/package.json

@@ -33,10 +33,10 @@
     "source-map": "0.8.0"
   },
   "devDependencies": {
-    "chokidar": "5.0.0"
+    "chokidar": "6.0.0"
   },
   "peerDependencies": {
-    "chokidar": "^5.0.0"
+    "chokidar": "^6.0.0"
   },
   "peerDependenciesMeta": {
     "chokidar": {