fs: apply exclude function to root path

lib/internal/fs/glob.js

@@ -9,6 +9,7 @@ const {
   ArrayPrototypePop,
   ArrayPrototypePush,
   ArrayPrototypeSome,
+  Promise,
   PromisePrototypeThen,
   SafeMap,
   SafeSet,
@@ -125,7 +126,8 @@ class Cache {
   }
   statSync(path) {
     const cached = this.#statsCache.get(path);
-    if (cached) {
+    // Do not return a promise from a sync function.
+    if (cached && !(cached instanceof Promise)) {
       return cached;
     }
     const val = getDirentSync(path);
@@ -326,6 +328,28 @@ class Glob {
     if (this.#isExcluded(path)) {
       return;
     }
+    const fullpath = resolve(this.#root, path);
+
+    // If path is a directory, add trailing slash and test patterns again.
+    // TODO(Trott): Would running #isExcluded() first and checking isDirectory() only
+    // if it matches be more performant in the typical use case? #isExcluded()
+    // is often ()=>false which is about as optimizable as a function gets.
+    if (this.#cache.statSync(fullpath).isDirectory() && this.#isExcluded(`${fullpath}/`)) {
+      return;
+    }
+
+    if (this.#exclude) {
+      if (this.#withFileTypes) {
+        const stat = this.#cache.statSync(path);
+        if (stat !== null) {
+          if (this.#exclude(stat)) {
+            return;
+          }
+        }
+      } else if (this.#exclude(path)) {
+        return;
+      }
+    }
     if (!this.#subpatterns.has(path)) {
       this.#subpatterns.set(path, [pattern]);
     } else {

test/parallel/test-fs-glob.mjs

@@ -388,7 +388,7 @@ describe('fsPromises glob - withFileTypes', function() {
 });
 
 // [pattern, exclude option, expected result]
-const pattern2 = [
+const patterns2 = [
   ['a/{b,c}*', ['a/*c'], ['a/b', 'a/cb']],
   ['a/{a,b,c}*', ['a/*bc*', 'a/cb'], ['a/b', 'a/c']],
   ['a/**/[cg]', ['**/c'], ['a/abcdef/g', 'a/abcfed/g']],
@@ -427,6 +427,10 @@ const pattern2 = [
     [`${absDir}/*{a,q}*`, './a/*{c,b}*/*'],
     [`${absDir}/foo`, 'a/c', ...(common.isWindows ? [] : ['a/symlink/a/b/c'])],
   ],
+  [ 'a/**', () => true, [] ],
+  [ 'a/**', [ '*' ], [] ],
+  [ 'a/**', [ '**' ], [] ],
+  [ 'a/**', [ 'a/**' ], [] ],
 ];
 
 describe('globSync - exclude', function() {
@@ -436,7 +440,7 @@ describe('globSync - exclude', function() {
       assert.strictEqual(actual.length, 0);
     });
   }
-  for (const [pattern, exclude, expected] of pattern2) {
+  for (const [pattern, exclude, expected] of patterns2) {
     test(`${pattern} - exclude: ${exclude}`, () => {
       const actual = globSync(pattern, { cwd: fixtureDir, exclude }).sort();
       const normalized = expected.filter(Boolean).map((item) => item.replaceAll('/', sep)).sort();
@@ -453,7 +457,7 @@ describe('glob - exclude', function() {
       assert.strictEqual(actual.length, 0);
     });
   }
-  for (const [pattern, exclude, expected] of pattern2) {
+  for (const [pattern, exclude, expected] of patterns2) {
     test(`${pattern} - exclude: ${exclude}`, async () => {
       const actual = (await promisified(pattern, { cwd: fixtureDir, exclude })).sort();
       const normalized = expected.filter(Boolean).map((item) => item.replaceAll('/', sep)).sort();
@@ -471,7 +475,7 @@ describe('fsPromises glob - exclude', function() {
       assert.strictEqual(actual.length, 0);
     });
   }
-  for (const [pattern, exclude, expected] of pattern2) {
+  for (const [pattern, exclude, expected] of patterns2) {
     test(`${pattern} - exclude: ${exclude}`, async () => {
       const actual = [];
       for await (const item of asyncGlob(pattern, { cwd: fixtureDir, exclude })) actual.push(item);