Use mypy from pixi environment

.pre-commit-config.yaml

@@ -31,14 +31,20 @@ repos:
       - id: ruff-check
         args: [--fix]
       - id: ruff-format
-  - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: "v2.1.0"
+  - repo: local
     hooks:
-      - id: mypy
-        additional_dependencies:
-          - "types-PyYAML"
-          - "types-requests"
-          - "numpy"
+      - id: type-check
+        name: type-check
+        entry: "pixi run --locked type-check"
+        # This uses local pixi installation
+        language: system
+        types:
+          - python
+        pass_filenames: false
+        # use require_serial so that script is only called once per commit
+        require_serial: true
+        verbose: false
+        always_run: false
   - repo: https://github.com/adrienverge/yamllint
     rev: "v1.38.0"
     hooks:

esmvalcore/cmor/_fixes/cordex/cordex_fixes.py

@@ -311,7 +311,7 @@ def _use_standard_lambert_conformal_grid(
         lon_coord.units = "degrees_east"
         lat_coord.units = "degrees_north"
         lon_coord.points, lat_coord.points = transformer.transform(
-            *np.meshgrid(x_coord.points, y_coord.points),
+            *np.meshgrid(x_coord.points, y_coord.points),  # type: ignore[call-overload]
             errcheck=True,
         )
 

esmvalcore/io/intake_esgf.py

@@ -38,6 +38,8 @@
 from esmvalcore.iris_helpers import dataset_to_iris
 
 if TYPE_CHECKING:
+    from collections.abc import Mapping
+
     import iris.cube
 
     from esmvalcore.typing import Facets, FacetValue
@@ -85,7 +87,7 @@ def to_path_dict(
         quiet: bool = False,
     ) -> dict[str, list[str | Path]]:
         """Return the current search as a dictionary of paths to files."""
-        kwargs = {
+        kwargs: Mapping[str, Any] = {
             "prefer_streaming": prefer_streaming,
             "globus_endpoint": globus_endpoint,
             "globus_path": globus_path,
@@ -250,7 +252,7 @@ def find_data(self, **facets: FacetValue) -> list[IntakeESGFDataset]:
             if not any(_isglob(v) for v in values)
         }
         # Translate "our" facets to ESGF facets and "our" values to ESGF values.
-        query = {
+        query: dict[str, Any] = {
             their_facet: [
                 self.values.get(our_facet, {}).get(v, v)
                 for v in non_glob_facets[our_facet]

esmvalcore/preprocessor/_io.py

@@ -25,7 +25,7 @@
 from esmvalcore.iris_helpers import dataset_to_iris
 
 if TYPE_CHECKING:
-    from collections.abc import Sequence
+    from collections.abc import Mapping, MutableMapping, Sequence
 
     from dask.delayed import Delayed
 
@@ -163,7 +163,7 @@ def load(
 def _load_zarr(
     file: str | Path,
     ignore_warnings: list[dict[str, Any]] | None = None,
-    backend_kwargs: dict[str, Any] | None = None,
+    backend_kwargs: Mapping[str, Any] | None = None,
 ) -> CubeList:
     # note on ``chunks`` kwarg to ``xr.open_dataset()``
     # docs.xarray.dev/en/stable/generated/xarray.open_dataset.html
@@ -177,7 +177,7 @@ def _load_zarr(
     # https://github.com/pp-mo/ncdata/issues/139
 
     time_coder = xr.coders.CFDatetimeCoder(use_cftime=True)
-    open_kwargs = {
+    open_kwargs: MutableMapping[str, Any] = {
         "consolidated": False,
         "decode_times": time_coder,
         "engine": "zarr",

pyproject.toml

@@ -141,6 +141,10 @@ ignore_missing_imports = true
 enable_error_code = [
     "truthy-bool",
 ]
+exclude = [
+  "^doc/conf.py$",
+  "esmvalcore/cmor/tables/",
+]
 
 # Configure linters
 
@@ -296,6 +300,7 @@ test-r = { features = ["test-r"], solve-group = "test-r" }
 # Other development tools.
 [tool.pixi.feature.dev.dependencies]
 "jupyterlab" = "*"
+"mypy" = "*"
 "pre-commit" = "*"
 "py-spy" = "*"
 
@@ -314,4 +319,5 @@ test-r = { features = ["test-r"], solve-group = "test-r" }
 # Tasks for use with `pixi run <task>`.
 [tool.pixi.tasks]
 test = {cmd = "pytest", description = "Run the tests"}
+type-check = {cmd = "mypy esmvalcore", description = "Run the type checks"}
 doc = {cmd = "sphinx-build doc html", description = "Build the documentation"}