Updates to use pathlib instead of os.path

src/documents/sanity_checker.py

@@ -1,7 +1,8 @@
 import hashlib
 import logging
-import os
 from collections import defaultdict
+from pathlib import Path
+from typing import Final
 
 from django.conf import settings
 from documents.models import Document
@@ -59,38 +60,37 @@ class SanityCheckFailedException(Exception):
 def check_sanity(progress=False) -> SanityCheckMessages:
     messages = SanityCheckMessages()
 
-    present_files = []
+    present_files = {
-    for root, subdirs, files in os.walk(settings.MEDIA_ROOT):
+        x.resolve() for x in Path(settings.MEDIA_ROOT).glob("**/*") if not x.is_dir()
-        for f in files:
+    }
-            present_files.append(os.path.normpath(os.path.join(root, f)))
 
-    lockfile = os.path.normpath(settings.MEDIA_LOCK)
+    lockfile = Path(settings.MEDIA_LOCK).resolve()
     if lockfile in present_files:
         present_files.remove(lockfile)
 
     for doc in tqdm(Document.objects.all(), disable=not progress):
         # Check sanity of the thumbnail
-        if not os.path.isfile(doc.thumbnail_path):
+        thumbnail_path: Final[Path] = Path(doc.thumbnail_path).resolve()
+        if not thumbnail_path.exists() or not thumbnail_path.is_file():
             messages.error(doc.pk, "Thumbnail of document does not exist.")
         else:
-            if os.path.normpath(doc.thumbnail_path) in present_files:
+            if thumbnail_path in present_files:
-                present_files.remove(os.path.normpath(doc.thumbnail_path))
+                present_files.remove(thumbnail_path)
             try:
-                with doc.thumbnail_file as f:
+                _ = thumbnail_path.read_bytes()
-                    f.read()
             except OSError as e:
                 messages.error(doc.pk, f"Cannot read thumbnail file of document: {e}")
 
         # Check sanity of the original file
         # TODO: extract method
-        if not os.path.isfile(doc.source_path):
+        source_path: Final[Path] = Path(doc.source_path).resolve()
+        if not source_path.exists() or not source_path.is_file():
             messages.error(doc.pk, "Original of document does not exist.")
         else:
-            if os.path.normpath(doc.source_path) in present_files:
+            if source_path in present_files:
-                present_files.remove(os.path.normpath(doc.source_path))
+                present_files.remove(source_path)
             try:
-                with doc.source_file as f:
+                checksum = hashlib.md5(source_path.read_bytes()).hexdigest()
-                    checksum = hashlib.md5(f.read()).hexdigest()
             except OSError as e:
                 messages.error(doc.pk, f"Cannot read original file of document: {e}")
             else:
@@ -102,25 +102,25 @@ def check_sanity(progress=False) -> SanityCheckMessages:
                     )
 
         # Check sanity of the archive file.
-        if doc.archive_checksum and not doc.archive_filename:
+        if doc.archive_checksum is not None and doc.archive_filename is None:
             messages.error(
                 doc.pk,
                 "Document has an archive file checksum, but no archive filename.",
             )
-        elif not doc.archive_checksum and doc.archive_filename:
+        elif doc.archive_checksum is None and doc.archive_filename is not None:
             messages.error(
                 doc.pk,
                 "Document has an archive file, but its checksum is missing.",
             )
         elif doc.has_archive_version:
-            if not os.path.isfile(doc.archive_path):
+            archive_path: Final[Path] = Path(doc.archive_path).resolve()
+            if not archive_path.exists() or not archive_path.is_file():
                 messages.error(doc.pk, "Archived version of document does not exist.")
             else:
-                if os.path.normpath(doc.archive_path) in present_files:
+                if archive_path in present_files:
-                    present_files.remove(os.path.normpath(doc.archive_path))
+                    present_files.remove(archive_path)
                 try:
-                    with doc.archive_file as f:
+                    checksum = hashlib.md5(archive_path.read_bytes()).hexdigest()
-                        checksum = hashlib.md5(f.read()).hexdigest()
                 except OSError as e:
                     messages.error(
                         doc.pk,