Modernize build system using PEP621 semantics (#97)

For more details, see https://peps.python.org/pep-0621/

Author: zoj613

.flake8

@@ -0,0 +1,6 @@
+[flake8]
+max-line-length = 88
+select = C,E,F,W
+ignore = E203,E231,E501,E741,W503,W504,C901
+per-file-ignores =
+    **/__init__.py:F401,E402,F403

.github/workflows/pypi.yml

@@ -27,20 +27,22 @@ jobs:
       - uses: actions/setup-python@v4
         with:
           python-version: "3.8"
-      - name: Build the sdist
+      - name: Build the sdist and wheel
         run: |
-          python setup.py sdist
+          python -m pip install --upgrade pip build
+          python -m build
       - name: Check the sdist installs and imports
         run: |
-          mkdir -p test-sdist
-          cd test-sdist
           python -m venv venv-sdist
-          venv-sdist/bin/python -m pip install ../dist/aehmc-*.tar.gz
+          # Since the whl distribution is build using sdist, it suffices
+          # to only test the wheel installation to ensure both function as expected.
+          venv-sdist/bin/python -m pip install dist/aehmc-*.whl
           venv-sdist/bin/python -c "import aehmc;print(aehmc.__version__)"
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v3
         with:
           name: artifact
-          path: dist/*
+          path: dist
+          if-no-files-found: error
 
   upload_pypi:
     name: Upload to PyPI on release

MANIFEST.in

@@ -1,2 +1,8 @@
-include versioneer.py
-include aehmc/_version.py
+prune .github
+prune examples
+exclude *.yaml
+exclude *.yml
+exclude .git*
+exclude *.py
+exclude *rc
+exclude .flake8

aehmc/__init__.py

@@ -1,3 +1,8 @@
-from . import _version
-
-__version__ = _version.get_versions()["version"]
+try:
+    from ._version import __version__, __version_tuple__
+except ImportError:  # pragma: no cover
+    raise RuntimeError(
+        "Unable to find the version number that is generated when either building or "
+        "installing from source. Please make sure that `aehmc` has been properly "
+        "installed, e.g. with\n\n  pip install -e .\n"
+    )