Add workflow to publish to PyPi

.github/workflows/cd.yml

@@ -0,0 +1,84 @@
+name: CD
+
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - '*'
+  release:
+    types: [published]
+
+jobs:
+  packaging:
+    if: github.repository_owner == 'sgkit-dev'
+    name: Packaging
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install build twine validate-pyproject[all]
+      - name: Check and install package
+        run: |
+          validate-pyproject pyproject.toml
+          python -m build
+          python -m twine check --strict dist/*
+          python -m pip install dist/*.whl
+      - name: Check vcztools CLI
+        run: |
+          vcztools --help
+          # Make sure we don't have ``vcztools`` in the CWD
+          cd tests
+          python -m vcztools --help
+      - name: Store the distribution packages
+        uses: actions/upload-artifact@v4
+        with:
+          name: python-package-distributions
+          path: dist/
+
+  publish-to-pypi:
+    if: github.repository_owner == 'sgkit-dev' && github.event_name == 'release'
+    needs:
+      - packaging
+    runs-on: ubuntu-latest
+
+    environment:
+      name: pypi
+      url: https://pypi.org/p/vcztools
+    permissions:
+      id-token: write  # IMPORTANT: mandatory for trusted publishing
+
+    steps:
+    - uses: actions/download-artifact@v4
+      with:
+        name: python-package-distributions
+        path: dist/
+    - uses: pypa/gh-action-pypi-publish@release/v1
+
+
+  publish-to-testpypi:
+    if: github.repository_owner == 'sgkit-dev' && github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
+    needs:
+      - packaging
+    runs-on: ubuntu-latest
+
+    environment:
+      name: testpypi
+      url: https://test.pypi.org/p/vcztools
+
+    permissions:
+      id-token: write  # IMPORTANT: mandatory for trusted publishing
+
+    steps:
+    - uses: actions/download-artifact@v4
+      with:
+        name: python-package-distributions
+        path: dist/
+    - uses: pypa/gh-action-pypi-publish@release/v1
+      with:
+        repository-url: https://test.pypi.org/legacy/

pyproject.toml

@@ -18,8 +18,27 @@ dependencies = [
   "pyparsing"
 ]
 requires-python = ">=3.9"
+classifiers = [
+  "Development Status :: 4 - Beta",
+  "License :: OSI Approved :: Apache Software License",
+  "Operating System :: POSIX",
+  "Operating System :: POSIX :: Linux",
+  "Operating System :: MacOS",
+  "Operating System :: MacOS :: MacOS X",
+  "Intended Audience :: Science/Research",
+  "Programming Language :: Python",
+  "Programming Language :: Python :: 3",
+  "Programming Language :: Python :: 3.9",
+  "Programming Language :: Python :: 3.10",
+  "Programming Language :: Python :: 3.11",
+  "Programming Language :: Python :: 3.12",
+  "Topic :: Scientific/Engineering"
+]
 dynamic = ["version"]
 
+[project.urls]
+repository = "https://github.com/sgkit-dev/vcztools"
+
 [project.scripts]
 vcztools = "vcztools.cli:vcztools_main"