From 391252476d623dc64c020ef08bb6da1bb3717a47 Mon Sep 17 00:00:00 2001
From: Thomas Waldmann <tw@waldmann-edv.de>
Date: Sat, 14 Feb 2026 20:45:09 +0100
Subject: [PATCH] remove API_VERSION check

we now have better build tools and these exceptions have
not been seen since long.
---
 src/borg/archiver/__init__.py   |  3 +--
 src/borg/chunkers/__init__.py   |  2 --
 src/borg/chunkers/buzhash.pyi   |  2 --
 src/borg/chunkers/buzhash.pyx   |  2 +-
 src/borg/chunkers/buzhash64.pyi |  2 --
 src/borg/chunkers/buzhash64.pyx |  2 +-
 src/borg/chunkers/failing.py    |  2 --
 src/borg/chunkers/fixed.py      |  1 -
 src/borg/chunkers/reader.pyi    |  2 --
 src/borg/chunkers/reader.pyx    |  2 +-
 src/borg/compress.pyi           |  2 --
 src/borg/compress.pyx           |  2 +-
 src/borg/crypto/low_level.pyi   |  2 --
 src/borg/crypto/low_level.pyx   |  2 +-
 src/borg/hashindex.pyi          |  2 --
 src/borg/hashindex.pyx          |  2 +-
 src/borg/helpers/__init__.py    |  2 +-
 src/borg/helpers/checks.py      | 19 -------------------
 src/borg/item.pyi               |  2 --
 src/borg/item.pyx               |  2 +-
 src/borg/platform/__init__.py   |  8 +-------
 src/borg/platform/base.py       |  1 -
 src/borg/platform/darwin.pyx    |  2 +-
 src/borg/platform/freebsd.pyx   |  2 +-
 src/borg/platform/linux.pyx     |  2 +-
 src/borg/platform/netbsd.pyx    |  2 +-
 26 files changed, 14 insertions(+), 60 deletions(-)
 delete mode 100644 src/borg/helpers/checks.py

diff --git a/src/borg/archiver/__init__.py b/src/borg/archiver/__init__.py
index 7f7610fae..834bf7b5c 100644
--- a/src/borg/archiver/__init__.py
+++ b/src/borg/archiver/__init__.py
@@ -40,7 +40,7 @@ try:
     from ..helpers import format_file_size
     from ..helpers import remove_surrogates, text_to_json
     from ..helpers import DatetimeWrapper, replace_placeholders
-    from ..helpers import check_extension_modules
+
     from ..helpers import is_slow_msgpack, is_supported_msgpack, sysinfo
     from ..helpers import signal_handler, raising_signal_handler, SigHup, SigTerm
     from ..helpers import ErrorIgnoringTextIOWrapper
@@ -456,7 +456,6 @@ class Archiver(
 
     def prerun_checks(self, logger, is_serve):
 
-        check_extension_modules()
         selftest(logger)
 
     def _setup_implied_logging(self, args):
diff --git a/src/borg/chunkers/__init__.py b/src/borg/chunkers/__init__.py
index 5e3094d03..dd3376985 100644
--- a/src/borg/chunkers/__init__.py
+++ b/src/borg/chunkers/__init__.py
@@ -4,8 +4,6 @@ from .failing import ChunkerFailing
 from .fixed import ChunkerFixed
 from .reader import *  # noqa
 
-API_VERSION = "1.2_01"
-
 
 def get_chunker(algo, *params, **kw):
     key = kw.get("key", None)
diff --git a/src/borg/chunkers/buzhash.pyi b/src/borg/chunkers/buzhash.pyi
index 16f9d46bb..72e1c7005 100644
--- a/src/borg/chunkers/buzhash.pyi
+++ b/src/borg/chunkers/buzhash.pyi
@@ -2,8 +2,6 @@ from typing import List, Iterator, BinaryIO
 
 from .reader import fmap_entry
 
-API_VERSION: str
-
 def buzhash(data: bytes, seed: int) -> int: ...
 def buzhash_update(sum: int, remove: int, add: int, len: int, seed: int) -> int: ...
 
diff --git a/src/borg/chunkers/buzhash.pyx b/src/borg/chunkers/buzhash.pyx
index 627d5ba62..d31ddf8b9 100644
--- a/src/borg/chunkers/buzhash.pyx
+++ b/src/borg/chunkers/buzhash.pyx
@@ -1,6 +1,6 @@
 # cython: language_level=3
 
-API_VERSION = '1.2_01'
+
 
 import cython
 import time
diff --git a/src/borg/chunkers/buzhash64.pyi b/src/borg/chunkers/buzhash64.pyi
index 7ff85b0f8..b5ee1879f 100644
--- a/src/borg/chunkers/buzhash64.pyi
+++ b/src/borg/chunkers/buzhash64.pyi
@@ -2,8 +2,6 @@ from typing import List, Iterator, BinaryIO
 
 from .reader import fmap_entry
 
-API_VERSION: str
-
 def buzhash64(data: bytes, key: bytes) -> int: ...
 def buzhash64_update(sum: int, remove: int, add: int, len: int, key: bytes) -> int: ...
 def buzhash64_get_table(key: bytes) -> List[int]: ...
diff --git a/src/borg/chunkers/buzhash64.pyx b/src/borg/chunkers/buzhash64.pyx
index c241e5845..a03a98829 100644
--- a/src/borg/chunkers/buzhash64.pyx
+++ b/src/borg/chunkers/buzhash64.pyx
@@ -1,6 +1,6 @@
 # cython: language_level=3
 
-API_VERSION = '1.2_01'
+
 
 import cython
 import time
diff --git a/src/borg/chunkers/failing.py b/src/borg/chunkers/failing.py
index 856ff6dee..771320851 100644
--- a/src/borg/chunkers/failing.py
+++ b/src/borg/chunkers/failing.py
@@ -1,5 +1,3 @@
-API_VERSION = "1.2_01"
-
 import os
 import errno
 from typing import BinaryIO, Iterator
diff --git a/src/borg/chunkers/fixed.py b/src/borg/chunkers/fixed.py
index 3cdab7a9f..bedc4df4a 100644
--- a/src/borg/chunkers/fixed.py
+++ b/src/borg/chunkers/fixed.py
@@ -1,6 +1,5 @@
 from typing import Iterator, BinaryIO
 
-API_VERSION = "1.2_01"
 
 import time
 
diff --git a/src/borg/chunkers/reader.pyi b/src/borg/chunkers/reader.pyi
index 76a0f53ec..53e92188e 100644
--- a/src/borg/chunkers/reader.pyi
+++ b/src/borg/chunkers/reader.pyi
@@ -1,7 +1,5 @@
 from typing import NamedTuple, Tuple, Dict, List, Any, Type, BinaryIO, Iterator
 
-API_VERSION: str
-
 has_seek_hole: bool
 
 class _Chunk(NamedTuple):
diff --git a/src/borg/chunkers/reader.pyx b/src/borg/chunkers/reader.pyx
index 26258914b..2a45e55ca 100644
--- a/src/borg/chunkers/reader.pyx
+++ b/src/borg/chunkers/reader.pyx
@@ -1,6 +1,6 @@
 # cython: language_level=3
 
-API_VERSION = '1.2_01'
+
 
 import os
 import errno
diff --git a/src/borg/compress.pyi b/src/borg/compress.pyi
index 64defa372..c8a271a1c 100644
--- a/src/borg/compress.pyi
+++ b/src/borg/compress.pyi
@@ -1,7 +1,5 @@
 from typing import Any, Type, Dict, Tuple
 
-API_VERSION: str
-
 def get_compressor(name: str, **kwargs) -> Any: ...
 
 class CompressionSpec:
diff --git a/src/borg/compress.pyx b/src/borg/compress.pyx
index e78821ec9..3327f4ee1 100644
--- a/src/borg/compress.pyx
+++ b/src/borg/compress.pyx
@@ -29,7 +29,7 @@ except ImportError:
 from .constants import MAX_DATA_SIZE, ROBJ_FILE_STREAM
 from .helpers import Buffer, DecompressionError
 
-API_VERSION = '1.2_02'
+
 
 cdef extern from "lz4.h":
     int LZ4_compress_default(const char* source, char* dest, int inputSize, int maxOutputSize) nogil
diff --git a/src/borg/crypto/low_level.pyi b/src/borg/crypto/low_level.pyi
index 7d5b0f9a7..9f8d61950 100644
--- a/src/borg/crypto/low_level.pyi
+++ b/src/borg/crypto/low_level.pyi
@@ -3,8 +3,6 @@
 
 from typing import Optional, Union
 
-API_VERSION: str
-
 # Module-level functions
 def num_cipher_blocks(length: int, blocksize: int = 16) -> int:
     """Return the number of cipher blocks required to encrypt/decrypt <length> bytes of data."""
diff --git a/src/borg/crypto/low_level.pyx b/src/borg/crypto/low_level.pyx
index f723cde52..074135c62 100644
--- a/src/borg/crypto/low_level.pyx
+++ b/src/borg/crypto/low_level.pyx
@@ -45,7 +45,7 @@ from libc.stdlib cimport malloc, free
 from libc.stdint cimport uint8_t, uint32_t, uint64_t
 from libc.string cimport memset, memcpy
 
-API_VERSION = '1.3_01'
+
 
 cdef extern from "openssl/crypto.h":
     int CRYPTO_memcmp(const void *a, const void *b, size_t len)
diff --git a/src/borg/hashindex.pyi b/src/borg/hashindex.pyi
index 626973319..60c4fa8da 100644
--- a/src/borg/hashindex.pyi
+++ b/src/borg/hashindex.pyi
@@ -1,7 +1,5 @@
 from typing import NamedTuple, Tuple, Type, IO, Iterator, Any
 
-API_VERSION: str
-
 PATH_OR_FILE = str | IO
 
 class ChunkIndexEntry(NamedTuple):
diff --git a/src/borg/hashindex.pyx b/src/borg/hashindex.pyx
index b2c466e15..a62a0491a 100644
--- a/src/borg/hashindex.pyx
+++ b/src/borg/hashindex.pyx
@@ -5,7 +5,7 @@ import struct
 
 from borghash import HashTableNT
 
-API_VERSION = '1.2_01'
+
 
 cdef _NoDefault = object()
 
diff --git a/src/borg/helpers/__init__.py b/src/borg/helpers/__init__.py
index 74800d6a3..7902d5bb6 100644
--- a/src/borg/helpers/__init__.py
+++ b/src/borg/helpers/__init__.py
@@ -10,7 +10,7 @@ import logging
 from collections import namedtuple
 
 from ..constants import *  # NOQA
-from .checks import check_extension_modules
+
 from .datastruct import StableDict, Buffer, EfficientCollectionQueue
 from .errors import Error, ErrorWithTraceback, IntegrityError, DecompressionError, CancelledByUser, CommandError
 from .errors import RTError, modern_ec
diff --git a/src/borg/helpers/checks.py b/src/borg/helpers/checks.py
deleted file mode 100644
index 8c935bee7..000000000
--- a/src/borg/helpers/checks.py
+++ /dev/null
@@ -1,19 +0,0 @@
-from .errors import RTError
-
-
-def check_extension_modules():
-    from .. import platform, compress, crypto, item, hashindex, chunkers
-
-    msg = """The Borg binary extension modules do not seem to be properly installed."""
-    if hashindex.API_VERSION != "1.2_01":
-        raise RTError(msg)
-    if chunkers.API_VERSION != "1.2_01":
-        raise RTError(msg)
-    if compress.API_VERSION != "1.2_02":
-        raise RTError(msg)
-    if crypto.low_level.API_VERSION != "1.3_01":
-        raise RTError(msg)
-    if item.API_VERSION != "1.2_01":
-        raise RTError(msg)
-    if platform.API_VERSION != platform.OS_API_VERSION or platform.API_VERSION != "1.2_05":
-        raise RTError(msg)
diff --git a/src/borg/item.pyi b/src/borg/item.pyi
index 53177394d..a5047da1b 100644
--- a/src/borg/item.pyi
+++ b/src/borg/item.pyi
@@ -2,8 +2,6 @@ from typing import Set, NamedTuple, Tuple, Mapping, Dict, List, Iterator, Callab
 
 from .helpers import StableDict
 
-API_VERSION: str
-
 def want_bytes(v: Any, *, errors: str = ...) -> bytes: ...
 def chunks_contents_equal(chunks1: Iterator, chunks2: Iterator) -> bool: ...
 
diff --git a/src/borg/item.pyx b/src/borg/item.pyx
index 7b1011659..8e39d346a 100644
--- a/src/borg/item.pyx
+++ b/src/borg/item.pyx
@@ -17,7 +17,7 @@ cdef extern from "_item.c":
     object _optr_to_object(object bytes)
 
 
-API_VERSION = '1.2_01'
+
 
 
 def fix_key(data, key, *, errors='strict'):
diff --git a/src/borg/platform/__init__.py b/src/borg/platform/__init__.py
index fed7e2fe9..ea0914fc5 100644
--- a/src/borg/platform/__init__.py
+++ b/src/borg/platform/__init__.py
@@ -8,7 +8,7 @@ from types import ModuleType
 
 from ..platformflags import is_win32, is_linux, is_freebsd, is_netbsd, is_darwin, is_cygwin, is_haiku
 
-from .base import ENOATTR, API_VERSION
+from .base import ENOATTR
 from .base import SaveFile, sync_dir, fdatasync, safe_fadvise
 from .base import get_process_id, fqdn, hostname, hostid, swidth
 
@@ -18,7 +18,6 @@ from . import xattr  # noqa: F401
 platform_ug: ModuleType | None = None  # make mypy happy
 
 if is_linux:  # pragma: linux only
-    from .linux import API_VERSION as OS_API_VERSION
     from .linux import listxattr, getxattr, setxattr
     from .linux import acl_get, acl_set
     from .linux import set_flags, get_flags
@@ -28,7 +27,6 @@ if is_linux:  # pragma: linux only
     from .posix import getosusername
     from . import posix_ug as platform_ug
 elif is_freebsd:  # pragma: freebsd only
-    from .freebsd import API_VERSION as OS_API_VERSION
     from .freebsd import listxattr, getxattr, setxattr
     from .freebsd import acl_get, acl_set
     from .freebsd import set_flags
@@ -39,7 +37,6 @@ elif is_freebsd:  # pragma: freebsd only
     from .posix import getosusername
     from . import posix_ug as platform_ug
 elif is_netbsd:  # pragma: netbsd only
-    from .netbsd import API_VERSION as OS_API_VERSION
     from .netbsd import listxattr, getxattr, setxattr
     from .base import acl_get, acl_set
     from .base import set_flags, get_flags
@@ -49,7 +46,6 @@ elif is_netbsd:  # pragma: netbsd only
     from .posix import getosusername
     from . import posix_ug as platform_ug
 elif is_darwin:  # pragma: darwin only
-    from .darwin import API_VERSION as OS_API_VERSION
     from .darwin import listxattr, getxattr, setxattr
     from .darwin import acl_get, acl_set
     from .darwin import is_darwin_feature_64_bit_inode, _get_birthtime_ns
@@ -62,7 +58,6 @@ elif is_darwin:  # pragma: darwin only
     from . import posix_ug as platform_ug
 elif not is_win32:  # pragma: posix only
     # Generic code for all other POSIX OSes
-    OS_API_VERSION = API_VERSION
     from .base import listxattr, getxattr, setxattr
     from .base import acl_get, acl_set
     from .base import set_flags, get_flags
@@ -73,7 +68,6 @@ elif not is_win32:  # pragma: posix only
     from . import posix_ug as platform_ug
 else:  # pragma: win32 only
     # Win32-specific stuff
-    OS_API_VERSION = API_VERSION
     from .base import listxattr, getxattr, setxattr
     from .base import acl_get, acl_set
     from .base import set_flags, get_flags
diff --git a/src/borg/platform/base.py b/src/borg/platform/base.py
index f4c39561b..53c1a3563 100644
--- a/src/borg/platform/base.py
+++ b/src/borg/platform/base.py
@@ -20,7 +20,6 @@ platform API; in this way, platform APIs provided by the platform-specific suppo
 are correctly composed into the base functionality.
 """
 
-API_VERSION = "1.2_05"
 
 fdatasync = getattr(os, "fdatasync", os.fsync)
 has_posix_fadvise = hasattr(os, "posix_fadvise")
diff --git a/src/borg/platform/darwin.pyx b/src/borg/platform/darwin.pyx
index 4f63607c3..4d73ff531 100644
--- a/src/borg/platform/darwin.pyx
+++ b/src/borg/platform/darwin.pyx
@@ -8,7 +8,7 @@ from . import posix_ug
 from ..helpers import safe_decode, safe_encode
 from .xattr import _listxattr_inner, _getxattr_inner, _setxattr_inner, split_string0
 
-API_VERSION = '1.2_05'
+
 
 cdef extern from *:
     """
diff --git a/src/borg/platform/freebsd.pyx b/src/borg/platform/freebsd.pyx
index d16e25482..83f2a4b28 100644
--- a/src/borg/platform/freebsd.pyx
+++ b/src/borg/platform/freebsd.pyx
@@ -7,7 +7,7 @@ from .posix import posix_acl_use_stored_uid_gid
 from ..helpers import safe_encode, safe_decode
 from .xattr import _listxattr_inner, _getxattr_inner, _setxattr_inner, split_lstring
 
-API_VERSION = '1.2_05'
+
 
 cdef extern from "sys/extattr.h":
     ssize_t c_extattr_list_file "extattr_list_file" (const char *path, int attrnamespace, void *data, size_t nbytes)
diff --git a/src/borg/platform/linux.pyx b/src/borg/platform/linux.pyx
index 138ee7a0f..df9dceff5 100644
--- a/src/borg/platform/linux.pyx
+++ b/src/borg/platform/linux.pyx
@@ -17,7 +17,7 @@ except ImportError:
 
 from libc cimport errno
 
-API_VERSION = '1.2_05'
+
 
 cdef extern from "sys/xattr.h":
     ssize_t c_listxattr "listxattr" (const char *path, char *list, size_t size)
diff --git a/src/borg/platform/netbsd.pyx b/src/borg/platform/netbsd.pyx
index b79c02abc..12c2c0904 100644
--- a/src/borg/platform/netbsd.pyx
+++ b/src/borg/platform/netbsd.pyx
@@ -1,6 +1,6 @@
 from .xattr import _listxattr_inner, _getxattr_inner, _setxattr_inner, split_lstring
 
-API_VERSION = '1.2_05'
+
 
 cdef extern from "sys/extattr.h":
     ssize_t c_extattr_list_file "extattr_list_file" (const char *path, int attrnamespace, void *data, size_t nbytes)