fs: apply nocase to literal glob exclude patterns

On case-insensitive platforms include patterns match entries
regardless of case, but literal (non-magic) exclude patterns were
matched case-sensitively because exclude matchers are created with
nocaseMagicOnly. Exclusion is a pure string match with no filesystem
lookups, so disable nocaseMagicOnly for exclude matchers.

Fixes: #58991
Refs: #63446
Signed-off-by: Yusuke Hayashi <yusuke8h@gmail.com>
PR-URL: #64817
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Stefan Stojanovic <stefan.stojanovic@janeasystems.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>

Author: yhay81

lib/internal/fs/glob.js

@@ -664,7 +664,10 @@ class Glob {
         // consistent comparison before instantiating matchers.
         const matchers = exclude
           .map((pattern) => resolve(this.#root, pattern))
-          .map((pattern) => createMatcher(pattern));
+          // Exclude matching is a pure string comparison with no filesystem
+          // lookups, so unlike include patterns, literal patterns must also
+          // match case-insensitively on case-insensitive platforms.
+          .map((pattern) => createMatcher(pattern, { nocaseMagicOnly: false }));
         this.#isExcluded = (value) =>
           matchers.some((matcher) => matcher.match(value));
         this.#results.setup(this.#root, this.#isExcluded);

test/parallel/test-fs-glob.mjs

@@ -983,3 +983,31 @@ describe('glob - seen cache', function() {
     );
   });
 });
+
+// gh-58991: exclude patterns must apply the same case-sensitivity as include
+// patterns. On case-insensitive filesystems include patterns match entries
+// regardless of case, so literal exclude patterns must match that behavior.
+const skipCaseTests = { skip: !common.isWindows && !common.isMacOS };
+describe('glob - exclude case-insensitive consistency', skipCaseTests, function() {
+  test('literal exclude ignores case (sync)', () => {
+    assert.deepStrictEqual(
+      globSync('a/b', { cwd: fixtureDir, exclude: ['A/B'] }), []);
+  });
+  test('literal exclude matches differently-cased results (sync)', () => {
+    assert.deepStrictEqual(
+      globSync('A/b', { cwd: fixtureDir, exclude: ['a/b'] }), []);
+  });
+  test('literal exclude ignores case (async)', async () => {
+    const promisified = promisify(glob);
+    assert.deepStrictEqual(
+      await promisified('a/b', { cwd: fixtureDir, exclude: ['A/B'] }), []);
+  });
+  test('literal exclude ignores case (promise)', async () => {
+    const actual = [];
+    for await (const entry of asyncGlob(
+      'a/b', { cwd: fixtureDir, exclude: ['A/B'] })) {
+      actual.push(entry);
+    }
+    assert.deepStrictEqual(actual, []);
+  });
+});