Bring back numcodecs version check

Author: agriyakhetarpal

.github/workflows/emscripten.yml

@@ -71,16 +71,19 @@ jobs:
         with:
           # See https://github.com/zarr-developers/numcodecs/pull/529
           repository: agriyakhetarpal/numcodecs
-          ref: setup-emscripten-ci
+          # ref: setup-emscripten-ci
           path: numcodecs-wasm
           submodules: recursive
           fetch-depth: 0
           fetch-tags: true
 
       # For some reason fetch-depth: 0 and fetch-tags: true aren't working...
-      - name: Manually fetch tags for numcodecs
-        working-directory: numcodecs-wasm
-        run: git fetch --tags
+      - name: Manually switch branch for numcodecs
+        run: |
+          cd numcodecs-wasm
+          git checkout setup-emscripten-ci
+          git fetch --unshallow || git fetch --all
+          git fetch --tags
 
       - name: Build numcodecs for WASM
         run: pyodide build
@@ -100,13 +103,7 @@ jobs:
           # Install numcodecs
           pip install $(ls numcodecs-wasm/dist/*.whl)"[crc32c]"
 
-          # Install Zarr without dependencies until we can figure out the
-          # numcodecs wheel versioning issue
-          pip install dist/*.whl --no-deps
-          pip install "packaging>=22.0" "numpy>=1.25" "typing_extensions>=4.9" "donfig>=0.8"
-
-          # Install test dependencies
-          pip install "coverage" "pytest" "pytest-asyncio" "pytest-cov" "pytest-accept" "rich" "mypy" "hypothesis"
+          # Install Zarr and test dependencies
+          pip install $(ls dist/*.whl)"[test]"
 
           python -m pytest tests -v --cov=zarr --cov-config=pyproject.toml
-

src/zarr/codecs/zstd.py

@@ -5,7 +5,9 @@
 from functools import cached_property
 from typing import TYPE_CHECKING
 
+import numcodecs
 from numcodecs.zstd import Zstd
+from packaging.version import Version
 
 from zarr.abc.codec import BytesBytesCodec
 from zarr.core.buffer.cpu import as_numpy_array_wrapper
@@ -42,12 +44,12 @@ class ZstdCodec(BytesBytesCodec):
 
     def __init__(self, *, level: int = 0, checksum: bool = False) -> None:
         # numcodecs 0.13.0 introduces the checksum attribute for the zstd codec
-        # _numcodecs_version = Version(numcodecs.__version__)
-        # if _numcodecs_version < Version("0.13.0"):
-        #     raise RuntimeError(
-        #         "numcodecs version >= 0.13.0 is required to use the zstd codec. "
-        #         f"Version {_numcodecs_version} is currently installed."
-        #     )
+        _numcodecs_version = Version(numcodecs.__version__)
+        if _numcodecs_version < Version("0.13.0"):
+            raise RuntimeError(
+                "numcodecs version >= 0.13.0 is required to use the zstd codec. "
+                f"Version {_numcodecs_version} is currently installed."
+            )
 
         level_parsed = parse_zstd_level(level)
         checksum_parsed = parse_checksum(checksum)