MNT: migrate requirement files to PEP 735 dependency groups

.github/workflows/test.yml

@@ -24,25 +24,17 @@ jobs:
         os:
         - ubuntu-latest
         - macos-latest
+        - windows-latest
         python-version:
         - '3.10'
         - '3.11'
         - '3.12'
         - '3.13'
-        test-args: [viscm>=0.10]
 
         include:
         - os: ubuntu-20.04
           python-version: '3.10'
           oldestdeps: true
-        - os: windows-latest
-          python-version: '3.10'
-        - os: windows-latest
-          python-version: '3.11'
-        - os: windows-latest
-          python-version: '3.12'
-        - os: windows-latest
-          python-version: '3.13'
 
     concurrency:
       group: ${{ github.ref }}-${{ matrix.os }}-${{ matrix.python-version }}-build
@@ -61,22 +53,18 @@ jobs:
       run: |
         echo "UV_RESOLUTION=lowest-direct" >> $GITHUB_ENV
 
-    - name: Build
-      run: |
-        uv venv
-        uv pip install .
-        uv pip install -r requirements/dev.txt ${{ matrix.test-args }}
-
-    - run: uv pip list
-
     - name: Test package (no coverage)
       if: ${{ !startsWith( matrix.os , 'ubuntu' ) }}
-      run: uv run --no-editable pytest --color=yes --mpl
+      shell: bash # windows compat
+      run: |
+        uv run --no-editable --group test \
+          pytest --color=yes --mpl
 
     - name: Test package (with coverage)
       if: startsWith( matrix.os , 'ubuntu' )
       run: |
-        uv run --no-editable coverage run --parallel-mode -m pytest --color=yes --mpl
+        uv run --no-editable --group test --group covcheck \
+          coverage run --parallel-mode -m pytest --color=yes --mpl
 
     - name: Upload coverage data
       # only using reports from ubuntu because
@@ -98,15 +86,12 @@ jobs:
     steps:
     - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
     - uses: astral-sh/setup-uv@38f3f104447c67c051c4a08e39b64a148898af3a # v4.2.0
-    - run: | # uv sync --only-group covcheck
-        uv venv
-        uv pip install -r requirements/dev.txt
-
     - uses: actions/download-artifact@fa0a91b85d4f404e444e00e005971372dc801d16 # v4.1.8
       with:
         pattern: cmasher_coverage_data-*
         merge-multiple: true
 
+    - run: uv sync --only-group covcheck
     - name: Check coverage
       run: |
         uv run --no-project coverage combine
@@ -144,9 +129,7 @@ jobs:
         cache-dependency-glob: pyproject.toml
 
     - name: Run mypy
-      run: |
-        uvx --with-requirements=requirements/typecheck.txt --with . \
-          mypy src/cmasher
+      run: uv run --no-editable --group typecheck mypy src/cmasher
 
   docs:
     name: Build docs

pyproject.toml

@@ -34,7 +34,7 @@ requires-python = ">=3.10, <4"
 dependencies = [
     "colorspacious>=1.1.0",
     "matplotlib>=3.5",
-    "numpy>=1.21.2",
+    "numpy>=1.21.2, <2.2.0", # upper bound is temporary
 ]
 
 [project.urls]
@@ -45,6 +45,35 @@ Documentation = "https://cmasher.readthedocs.io"
 [project.scripts]
 cmr = "cmasher.cli_tools:main"
 
+[dependency-groups]
+test = [
+  "pyqt5>=5.15.6",
+  "pytest>=8.1.1",
+  "pytest-mpl>=0.13.0",
+
+  # TODO: lift the constraint on python_version:
+  # only tests with minimal requirements fail, but that's probably solved by
+  # requiring a more recent version of other dependencies (colorspacious or numpy)
+  "viscm>=0.10 ; platform_system != 'Windows' and python_version > '3.10'",
+
+  # TODO: move these constraints to a lockfile
+  # or even drop them if possible
+  # context: PyQt5-Qt5 is a required dependency to pyqt5 but
+  # it only comes in wheels. 5.15.2 is the only version with windows wheels,
+  # and *that* version doesn't have macOS arm64 wheels.
+  # 5.15.14 is the first version with wheels for both Linux and MacOS+arm64
+  "PyQt5-Qt5==5.15.2 ; platform_system == 'Windows'",
+  "PyQt5-Qt5>=5.15.14 ; platform_system != 'Windows'",
+]
+covcheck = [
+  "coverage[toml]>=7.6.4 ; python_version < '3.11'",
+  "coverage>=7.6.4 ; python_version >= '3.11'",
+]
+typecheck = [
+    "mypy==1.7.1",
+    "pytest==8.1.1",
+]
+
 [tool.hatch.build.targets.sdist]
 include = [
   "src/cmasher/*.py",
@@ -54,7 +83,6 @@ include = [
   "LICENSE",
   "CITATION",
   "README.rst",
-  "requirements/*.txt",
   "conftest.py",
   "tests",
 ]