chore: use stdlib typing instead of typing_extensions (#5149)

py-shared requires Python >= 3.12 and s3hash 3.13, so `assert_never` (stdlib since 3.11) and `ParamSpec` (since 3.10) no longer need the backport.

s3hash was importing `typing_extensions` without declaring it, relying on `quilt-shared[pydantic]` to pull it in.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: sir-sigurd

lambdas/s3hash/src/t4_lambda_s3hash/__init__.py

@@ -14,7 +14,6 @@
 import aiobotocore.session
 import botocore.exceptions
 import pydantic.v1
-import typing_extensions as TX
 
 from quilt3.data_transfer import get_checksum_chunksize, is_mpu
 from quilt_shared.aws import AWSCredentials
@@ -351,7 +350,7 @@ async def compute_checksum(
     elif algorithm is ChecksumAlgorithm.SHA256_CHUNKED:
         checksum = Checksum.sha256_chunked_from_parts(part_checksums)
     else:
-        TX.assert_never(algorithm)
+        T.assert_never(algorithm)
 
     logger.info(f"[PERF] compute_checksum END: {location} -> {checksum.type}")
     return ChecksumResult(checksum=checksum)

py-shared/CHANGELOG.md

@@ -17,6 +17,7 @@ where verb is one of
 
 ## Changes
 
+- [Removed] Drop the `typing-extensions` dependency from the `pydantic` extra ([#5149](https://github.com/quiltdata/quilt/pull/5149))
 - [Changed] **BREAKING**: Raise minimum Python to 3.12 ([#5018](https://github.com/quiltdata/quilt/pull/5018))
 - [Changed] **BREAKING**: Retarget `QueryMaker` to per-bucket Iceberg tables (`{bucket}_{table}`) ([#4930](https://github.com/quiltdata/quilt/pull/4930))
 - [Added] Add CRC64NVME checksum type support ([#4623](https://github.com/quiltdata/quilt/pull/4623))

py-shared/pyproject.toml

@@ -13,7 +13,6 @@ dependencies = [
 [project.optional-dependencies]
 pydantic = [
   "pydantic ~= 2.10",
-  "typing-extensions ~= 4.9",
 ]
 boto = [
   "boto3 ~= 1.34",

py-shared/src/quilt_shared/pkgpush.py

@@ -8,7 +8,6 @@
 import typing as T
 
 import pydantic.v1
-import typing_extensions as TX
 
 from .aws import AWSCredentials
 from .crc64 import combine_crc64nvme
@@ -83,15 +82,15 @@ def s3_checksum_algorithm(self):
             return "SHA256"
         if self is self.CRC64NVME:
             return "CRC64NVME"
-        TX.assert_never(self)
+        T.assert_never(self)
 
     @property
     def s3_checksum_field(self):
         if self is self.SHA256_CHUNKED:
             return "ChecksumSHA256"
         if self is self.CRC64NVME:
             return "ChecksumCRC64NVME"
-        TX.assert_never(self)
+        T.assert_never(self)
 
 
 class ChecksumType(str, enum.Enum):

py-shared/src/quilt_shared/types.py

@@ -2,15 +2,14 @@
 import typing as T
 
 import pydantic.v1
-import typing_extensions as TX
 
 
 class NonEmptyStr(pydantic.v1.ConstrainedStr):
     min_length = 1
     strip_whitespace = True
 
 
-ConsParams = TX.ParamSpec("ConsParams")
+ConsParams = T.ParamSpec("ConsParams")
 ConsReturn = T.TypeVar("ConsReturn")
 FnReturn = T.TypeVar("FnReturn")