feat(hls): Enhance segment retrieval by allowing all file types and clean up empty segment directories. Fixes issues with VTT files from HLS not being found correctly due to new HLS "changes"

unshackle/core/manifests/hls.py

@@ -4,6 +4,7 @@ import base64
 import html
 import json
 import logging
+import os
 import shutil
 import subprocess
 import sys
@@ -590,7 +591,7 @@ class HLS:
 
             # First check direct files in the directory
             if directory.exists():
-                segments.extend([x for x in directory.iterdir() if x.is_file() and x.suffix in {".ts", ".mp4", ".m4s"}])
+                segments.extend([x for x in directory.iterdir() if x.is_file()])
 
                 # If no direct files, recursively search subdirectories
                 if not segments:
@@ -614,8 +615,17 @@ class HLS:
                         discontinuity_data = discontinuity_file.read_bytes()
                         f.write(discontinuity_data)
                         f.flush()
+                        os.fsync(f.fileno())
                         discontinuity_file.unlink()
 
+        # Clean up empty segment directory
+        if save_dir.exists() and save_dir.name.endswith("_segments"):
+            try:
+                save_dir.rmdir()
+            except OSError:
+                # Directory might not be empty, try removing recursively
+                shutil.rmtree(save_dir, ignore_errors=True)
+
         progress(downloaded="Downloaded")
 
         track.path = save_path