Add ** glob support for recursive directory matching in excludePath()

Fixes #405. The `*` wildcard now correctly matches within a single
directory level only (not across `/`), while the new `**` wildcard
matches across any number of directory levels. This enables patterns
like `**/Tests/` to exclude test directories at any depth.

https://claude.ai/code/session_01SMWs4ae2xSVr15EwiNcnsH

Author: claude

src/Glob.php

@@ -8,10 +8,11 @@ class Glob
     public static function toRegex(string $glob): string
     {
         $regexp = strtr(preg_quote($glob, '/'), [
-            '\*' => '.*',
-            '\?' => '.',
-            '\[' => '[',
-            '\]' => ']',
+            '\*\*' => '.*',
+            '\*'   => '[^\/]*',
+            '\?'   => '[^\/]',
+            '\['   => '[',
+            '\]'   => ']',
             '\[\!' => '[ˆ',
         ]);
 

tests/Unit/ClassSetTest.php

@@ -86,6 +86,38 @@ public function test_can_exclude_glob_patterns(): void
         self::assertEquals($expected, $actual);
     }
 
+    public function test_can_exclude_using_double_wildcard_glob_pattern(): void
+    {
+        $structure = [
+            'Domain' => [
+                'Product' => [
+                    'Tests' => [
+                        'ProductTest.php' => '',
+                    ],
+                    'Product.php' => '',
+                ],
+                'User' => [
+                    'Tests' => [
+                        'UserTest.php' => '',
+                    ],
+                    'User.php' => '',
+                ],
+            ],
+        ];
+
+        $path = vfsStream::setup('root', null, $structure)->url();
+        $set = ClassSet::fromDir($path)->excludePath('**/Tests/');
+
+        $expected = [
+            'Domain/Product/Product.php',
+            'Domain/User/User.php',
+        ];
+
+        $actual = array_values(array_map(static fn ($item) => $item->getRelativePathname(), iterator_to_array($set)));
+
+        self::assertEquals($expected, $actual);
+    }
+
     protected function createMvcProjectStructure(): string
     {
         $structure = [

tests/Unit/GlobTest.php

@@ -10,19 +10,22 @@ class GlobTest extends TestCase
 {
     public function test_can_exclude_using_glob_pattern(): void
     {
-        // * - Matches zero or more characters.
-        self::assertEquals('/.*Catalog.*/', Glob::toRegex('*Catalog*'));
+        // * - Matches zero or more characters except directory separator.
+        self::assertEquals('/[^\/]*Catalog[^\/]*/', Glob::toRegex('*Catalog*'));
 
-        // * - Matches zero or more characters.
+        // * - Matches zero or more characters except directory separator.
         self::assertEquals('/Cata\.log/', Glob::toRegex('Cata.log'));
 
-        // ? - Matches exactly one character (any character).
-        self::assertEquals('/C.talog/', Glob::toRegex('C?talog'));
+        // ? - Matches exactly one character (any character except directory separator).
+        self::assertEquals('/C[^\/]talog/', Glob::toRegex('C?talog'));
 
         // [...] - Matches one character from a group of characters. If the first character is !, matches any character not in the group.
         self::assertEquals('/prova[123]/', Glob::toRegex('prova[123]'));
 
         // [...] - Matches one character from a group of characters. If the first character is !, matches any character not in the group.
         self::assertEquals('/prova[ˆ123]/', Glob::toRegex('prova[!123]'));
+
+        // ** - Matches zero or more characters including directory separator (recursive).
+        self::assertEquals('/.*\/Tests\//', Glob::toRegex('**/Tests/'));
     }
 }