Obtained from:	https://github.com/pimutils/vdirsyncer/commit/8b063c39cb3e26a2beef5b6beed7e99c9e9641ac

--- setup.py.orig	2024-09-11 15:26:58 UTC
+++ setup.py
@@ -16,8 +16,6 @@ requirements = [
     "click>=5.0,<9.0",
     "click-log>=0.3.0, <0.5.0",
     "requests >=2.20.0",
-    # https://github.com/untitaker/python-atomicwrites/commit/4d12f23227b6a944ab1d99c507a69fdbc7c9ed6d  # noqa
-    "atomicwrites>=0.1.7",
     "aiohttp>=3.8.0,<4.0.0",
     "aiostream>=0.4.3,<0.5.0",
 ]
--- vdirsyncer/cli/utils.py.orig	2024-09-11 15:26:58 UTC
+++ vdirsyncer/cli/utils.py
@@ -10,7 +10,6 @@ import click
 
 import aiohttp
 import click
-from atomicwrites import atomic_write
 
 from .. import BUGTRACKER_HOME
 from .. import DOCS_HOME
@@ -21,6 +20,7 @@ from ..sync.status import SqliteStatus
 from ..sync.exceptions import StorageEmpty
 from ..sync.exceptions import SyncConflict
 from ..sync.status import SqliteStatus
+from ..utils import atomic_write
 from ..utils import expand_path
 from ..utils import get_storage_init_args
 from . import cli_logger
--- vdirsyncer/storage/filesystem.py.orig	2024-09-11 15:26:58 UTC
+++ vdirsyncer/storage/filesystem.py
@@ -5,9 +5,8 @@ import subprocess
 import os
 import subprocess
 
-from atomicwrites import atomic_write
-
 from .. import exceptions
+from ..utils import atomic_write
 from ..utils import checkdir
 from ..utils import expand_path
 from ..utils import generate_href
--- vdirsyncer/storage/google.py.orig	2024-09-11 15:26:58 UTC
+++ vdirsyncer/storage/google.py
@@ -11,9 +11,9 @@ import click
 
 import aiohttp
 import click
-from atomicwrites import atomic_write
 
 from .. import exceptions
+from ..utils import atomic_write
 from ..utils import checkdir
 from ..utils import expand_path
 from ..utils import open_graphical_browser
--- vdirsyncer/storage/singlefile.py.orig	2024-09-11 15:26:58 UTC
+++ vdirsyncer/storage/singlefile.py
@@ -8,9 +8,8 @@ from typing import Iterable
 import os
 from typing import Iterable
 
-from atomicwrites import atomic_write
-
 from .. import exceptions
+from ..utils import atomic_write
 from ..utils import checkfile
 from ..utils import expand_path
 from ..utils import get_etag_from_file
--- vdirsyncer/utils.py.orig	2024-09-11 15:26:58 UTC
+++ vdirsyncer/utils.py
@@ -1,8 +1,10 @@ from __future__ import annotations
 from __future__ import annotations
 
+import contextlib
 import functools
 import os
 import sys
+import tempfile
 import uuid
 from inspect import getfullargspec
 from typing import Callable
@@ -220,3 +222,27 @@ def open_graphical_browser(url, new=0, autoraise=True)
             return
 
     raise RuntimeError("No graphical browser found. Please open the URL " "manually.")
+
+
+@contextlib.contextmanager
+def atomic_write(dest, mode="wb", overwrite=False):
+    if "w" not in mode:
+        raise RuntimeError("`atomic_write` requires write access")
+
+    fd, src = tempfile.mkstemp(prefix=os.path.basename(dest), dir=os.path.dirname(dest))
+    file = os.fdopen(fd, mode=mode)
+
+    try:
+        yield file
+    except Exception:
+        os.unlink(src)
+        raise
+    else:
+        file.flush()
+        file.close()
+
+        if overwrite:
+            os.rename(src, dest)
+        else:
+            os.link(src, dest)
+            os.unlink(src)