Fix regression of snippets nested deeply under specified base path (#…

…2039)

Fixes #2038

docs/src/markdown/about/changelog.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## 10.0.1
+
+- **FIX**: Regression related to snippets nested deeply under specified base path.
+
 ## 10.0
 
 - **Break**: Snippets: snippets will restrict snippets to ensure they are under the `base_path` preventing snippets

pymdownx/__meta__.py

@@ -185,5 +185,5 @@ def parse_version(ver, pre=False):
     return Version(major, minor, micro, release, pre, post, dev)
 
 
-__version_info__ = Version(10, 0, 0, "final")
+__version_info__ = Version(10, 0, 1, "final")
 __version__ = __version_info__._get_canonical()

pymdownx/snippets.py

@@ -163,7 +163,7 @@ def get_snippet_path(self, path):
                     if self.restrict_base_path:
                         filename = os.path.abspath(os.path.join(base, path))
                         # If the absolute path is no longer under the specified base path, reject the file
-                        if not os.path.samefile(base, os.path.dirname(filename)):
+                        if not filename.startswith(base):
                             continue
                     else:
                         filename = os.path.join(base, path)

tests/test_extensions/test_snippets.py

@@ -510,6 +510,34 @@ def test_restricted(self):
             )
 
 
+class TestSnippetsMultiNested(util.MdCase):
+    """Test multi-nested restriction."""
+
+    extension = [
+        'pymdownx.snippets',
+    ]
+
+    extension_configs = {
+        'pymdownx.snippets': {
+            'base_path': os.path.join(BASE),
+            'check_paths': True
+        }
+    }
+
+    def test_restricted_multi_nested(self):
+        """Test file restriction."""
+
+        self.check_markdown(
+            R'''
+            --8<-- "_snippets/b.txt"
+            ''',
+            '''
+            <p>Snippet</p>
+            ''',
+            True
+        )
+
+
 class TestSnippetsNestedUnrestricted(util.MdCase):
     """Test nested no bounds."""