Inotify's symlink follow with recursive option

* Using symlink follow now working as intended with recursive (used to
  be shallow only)
* Add test for recursive + follow symlink for Inotify observer
* Improve test for recursive cases : in case of recursive Inotify
  directory open event always triggers

Author: Corentin-pro

src/watchdog/observers/inotify_c.py

@@ -408,7 +408,7 @@ def _add_dir_watch(self, path: bytes, mask: int, *, recursive: bool) -> None:
             raise OSError(errno.ENOTDIR, os.strerror(errno.ENOTDIR), path)
         self._add_watch(path, mask)
         if recursive:
-            for root, dirnames, _ in os.walk(path):
+            for root, dirnames, _ in os.walk(path, followlinks=self._follow_symlink):
                 for dirname in dirnames:
                     full_path = os.path.join(root, dirname)
                     if not self._follow_symlink and os.path.islink(full_path):

tests/test_inotify_buffer.py

@@ -11,7 +11,8 @@
 import random
 import time
 
-from watchdog.observers.inotify_buffer import InotifyBuffer
+from watchdog.observers.inotify_c import InotifyConstants
+from watchdog.observers.inotify_buffer import InotifyBuffer, InotifyEvent
 
 from .shell import mkdir, mount_tmpfs, mv, rm, symlink, touch, unmount
 
@@ -126,7 +127,29 @@ def test_delete_watched_directory_symlink_followed(p):
     rm(p("dir", "dir2"), recursive=True)
 
     # Wait for the event to be picked up
-    inotify.read_event()
+    event = inotify.read_event()
+    while not isinstance(event, InotifyEvent) or (
+            event.mask != (InotifyConstants.IN_DELETE | InotifyConstants.IN_ISDIR)):
+        event = inotify.read_event()
+
+    # Ensure InotifyBuffer shuts down cleanly without raising an exception
+    inotify.close()
+
+
+@pytest.mark.timeout(5)
+def test_delete_watched_directory_symlink_followed_recursive(p):
+    mkdir(p("dir"), parents=True)
+    mkdir(p("dir2", "dir3", "dir4"), parents=True)
+    symlink(p("dir2"), p("dir", "symdir"), target_is_directory=True)
+
+    inotify = InotifyBuffer(p("dir").encode(), follow_symlink=True, recursive=True)
+    rm(p("dir2", "dir3", "dir4"), recursive=True)
+
+    # Wait for the event to be picked up
+    event = inotify.read_event()
+    while not isinstance(event, InotifyEvent) or (
+            event.mask != (InotifyConstants.IN_DELETE | InotifyConstants.IN_ISDIR)):
+        event = inotify.read_event()
 
     # Ensure InotifyBuffer shuts down cleanly without raising an exception
     inotify.close()