Simplify File artifact implementation (#192)

ixdiagnose/artifacts/items/file.py

@@ -1,5 +1,5 @@
-import contextlib
 import os
+import pathlib
 import shutil
 
 from ixdiagnose.utils.io import truncate_file
@@ -13,38 +13,27 @@ class File(Item):
     def __init__(self, name: str, max_size: Optional[int] = None, truncate: Optional[bool] = True):
         super().__init__(name, max_size)
         self.truncate: bool = truncate
-        self.file_descriptor: Optional[int] = None
-
-    def initialize_context(self, item_path: str):
-        self.file_descriptor = os.open(item_path, os.O_RDONLY | os.O_NOFOLLOW)
 
     def size(self, item_path: str) -> int:
-        return os.fstat(self.file_descriptor).st_size
+        try:
+            return pathlib.Path(item_path).lstat().st_size
+        except Exception:
+            return 0
 
     def copy_impl(self, item_path: str, destination_path: str) -> list:
-        shutil.copy2(self.get_fd_path(), destination_path)
-        return [item_path]
-
-    def get_fd_path(self) -> str:
-        return os.path.join('/proc/self/fd', str(self.file_descriptor))
+        try:
+            shutil.copy2(item_path, destination_path)
+            return [item_path]
+        except Exception:
+            return []
 
     def to_be_copied_checks(self, item_path: str) -> Tuple[bool, Optional[str]]:
         to_copy, error = (True, None) if os.path.isfile(item_path) else (False, f'{item_path!r} is not a file')
         if to_copy and not self.truncate:
             return self.size_check(item_path)
         return to_copy, error
 
-    def close_descriptor(self):
-        if self.file_descriptor:
-            with contextlib.suppress(OSError):
-                os.close(self.file_descriptor)
-                self.file_descriptor = None
-
-    def __del__(self):
-        self.close_descriptor()
-
     def post_copy_hook(self, destination_path: str):
-        self.close_descriptor()
         if self.max_size is None:
             return