Update minimum supported version policy checker

.github/ci/policy.yaml

@@ -0,0 +1,25 @@
+channels:
+  - conda-forge
+platforms:
+  - noarch
+  - linux-64
+policy:
+  # all packages in months
+  packages:
+    python: 30
+    numpy: 18
+  default: 12
+  # overrides for the policy
+  overrides: {}
+  # these packages are completely ignored
+  exclude:
+    - pytest
+    - hypothesis
+    - pytest-html
+    - pytest-cov
+    - nbval
+    - uxarray # undergoes active development
+    - xgcm # undergoes active development
+
+  # these packages don't fail the CI, but will be printed in the report
+  ignored_violations: []

.github/workflows/additional.yml

@@ -8,32 +8,21 @@ jobs:
   min-version-policy:
     name: Minimum Version Policy
     runs-on: "ubuntu-latest"
-    defaults:
-      run:
-        shell: bash -l {0}
-
+    env:
+      COLUMNS: 120
     steps:
       - uses: actions/checkout@v5
-      - name: Setup micromamba
-        uses: mamba-org/setup-micromamba@v2
-        with:
-          environment-name: min-deps
-          create-args: >-
-            python=3.12
-            pyyaml
-            conda
-            python-dateutil
-
-      - name: Core deps minimum versions policy
-        run: |
-          python .github/ci/min_deps_check.py .github/ci/min-core-deps.yml
+      - uses: astral-sh/setup-uv@v7
+      - run: |
+          uv run --with 'minimum-dependency-versions @ git+https://github.com/xarray-contrib/[email protected]' \
+          python -m minimum_versions validate \
+          --policy=.github/ci/policy.yaml \
+          --manifest-path=./pixi.toml \
+          pixi:test-minimum
 
   linkcheck:
     name: pixi run docs-linkcheck
     runs-on: "ubuntu-latest"
-    defaults:
-      run:
-        shell: bash -l {0}
 
     steps:
       - uses: actions/checkout@v5

pixi.toml

@@ -19,7 +19,7 @@ setuptools_scm = "*"
 
 [package.run-dependencies] # keep section in sync with pyproject.toml dependencies
 python = ">=3.11"
-netcdf4 = ">=1.7.2"
+netcdf4 = ">=1.6.0"
 numpy = ">=2.1.0"
 tqdm = ">=4.50.0"
 xarray = ">=2024.5.0"
@@ -35,18 +35,18 @@ pooch = ">=1.8.0"
 parcels = { path = "." }
 
 [feature.minimum.dependencies]
-python = "==3.11"
-netcdf4 = "==1.7.2"
-numpy = "==2.1.0"
-tqdm = "==4.50.0"
-xarray = "==2024.5.0"
-uxarray = "==2025.3.0"
-dask = "==2024.5.1"
-zarr = "==2.15.0"
-xgcm = "==0.9.0"
-cf_xarray = "==0.8.6"
-cftime = "==1.6.3"
-pooch = "==1.8.0"
+python = "3.11.*"
+netcdf4 = "1.6.*"
+numpy = "2.1.*"
+tqdm = "4.50.*"
+xarray = "2024.5.*"
+uxarray = "2025.3.*"
+dask = "2024.5.*"
+zarr = "2.15.*"
+xgcm = "0.9.*"
+cf_xarray = "0.8.*"
+cftime = "1.6.*"
+pooch = "1.8.*"
 
 [feature.py311.dependencies]
 python = "3.11.*"