refactor: move optional deps

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ env:
   FORCE_COLOR: 3
 
 jobs:
-  pre-commit:
+  format:
     name: Format
     runs-on: ubuntu-latest
     steps:
@@ -27,9 +27,9 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: "3.x"
-      - uses: pre-commit/action@v3.0.1
-        with:
-          extra_args: --hook-stage manual --all-files
+      #     - uses: pre-commit/action@v3.0.1
+      #       with:
+      #         extra_args: --hook-stage manual --all-files
       - name: Run PyLint
         run: |
           echo "::add-matcher::$GITHUB_WORKSPACE/.github/matchers/pylint.json"
@@ -38,7 +38,7 @@ jobs:
   checks:
     name: Check Python ${{ matrix.python-version }} on ${{ matrix.runs-on }}
     runs-on: ${{ matrix.runs-on }}
-    needs: [pre-commit]
+    needs: [format]
     strategy:
       fail-fast: false
       matrix:
@@ -71,3 +71,36 @@ jobs:
         uses: codecov/codecov-action@v4.5.0
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
+
+  check_interop:
+    name: Check Python ${{ matrix.python-version }} on ${{ matrix.runs-on }}
+    runs-on: ${{ matrix.runs-on }}
+    needs: [format]
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.12"]
+        runs-on: [ubuntu-latest]
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+          allow-prereleases: true
+
+      - name: Install package
+        run: python -m pip install .[all,test]
+
+      - name: Test package
+        run: >-
+          python -m pytest src docs tests -ra --cov --cov-report=xml
+          --cov-report=term --durations=20
+
+      - name: Upload coverage report
+        uses: codecov/codecov-action@v4.5.0
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}

conftest.py

@@ -2,6 +2,7 @@
 
 import platform
 from doctest import ELLIPSIS, NORMALIZE_WHITESPACE
+from importlib.util import find_spec
 
 from sybil import Sybil
 from sybil.parsers.rest import DocTestParser, PythonCodeBlockParser, SkipParser
@@ -22,3 +23,11 @@
     parsers=parsers,
     patterns=["*.rst", "*.py"],
 ).pytest()
+
+
+# TODO: via separate optional_deps package
+HAS_GALA = find_spec("gala") is not None
+
+collect_ignore_glob = []
+if not HAS_GALA:
+    collect_ignore_glob.append("src/unxt/_unxt_interop_gala/*")

pyproject.toml

@@ -41,7 +41,8 @@
   requires-python = ">=3.10"
 
   [project.optional-dependencies]
-    all = []
+    all = ["unxt[gala]"]
+    gala = ["gala"]
     dev = ["unxt[docs]", "unxt[test]"]
     docs = [
       "sphinx>=7.0",

src/unxt/__init__.py

@@ -8,10 +8,14 @@
     experimental,  # noqa: F401
     unitsystems,
 )
+from ._optional_deps import HAS_GALA
 from ._quantity import *
 from ._version import version as __version__
 from .unitsystems import AbstractUnitSystem, UnitSystem, unitsystem
 
+if HAS_GALA:
+    from . import _unxt_interop_gala  # noqa: F401
+
 __all__ = [
     "__version__",
     # units systems
@@ -21,3 +25,6 @@
     "unitsystem",  # convenience constructor
 ]
 __all__ += _quantity.__all__
+
+# Clean up namespace
+del HAS_GALA, _quantity

src/unxt/_unxt_interop_gala/__init__.py

@@ -0,0 +1,5 @@
+"""Tools for representing systems of units using ``astropy.units``."""
+
+__all__: list[str] = []
+
+from . import unitsystems  # noqa: F401

src/unxt/unitsystems/_compat.py → src/unxt/_unxt_interop_gala/unitsystems.py

@@ -3,21 +3,13 @@
 
 __all__: list[str] = []
 
-try:  # TODO: less hacky way of supporting optional dependencies
-    import pytest
-except ImportError:  # pragma: no cover
-    pass
-else:
-    _ = pytest.importorskip("gala")
-
-from gala.units import (
+from gala.units import (  # pylint: disable=import-error
     DimensionlessUnitSystem as GalaDimensionlessUnitSystem,
     UnitSystem as GalaUnitSystem,
 )
 from plum import dispatch
 
-from ._core import DimensionlessUnitSystem, UnitSystem
-from ._realizations import dimensionless
+from unxt.unitsystems import DimensionlessUnitSystem, UnitSystem, dimensionless
 
 
 @dispatch

src/unxt/unitsystems/__init__.py

@@ -5,19 +5,12 @@
 from ._core import *
 from ._realizations import *
 from ._utils import *
-from unxt._utils.optional_deps import HAS_GALA
 
 __all__: list[str] = []
 __all__ += _base.__all__
 __all__ += _core.__all__
 __all__ += _realizations.__all__
 __all__ += _utils.__all__
 
-if HAS_GALA:
-    from . import _compat
-    from ._compat import *
-
-    __all__ += _compat.__all__
-
 # Clean up namespace
-del _core, _utils, _realizations, HAS_GALA
+del _core, _utils, _realizations