ci: Add publishing workflow.

Author: mfmceneaney

.github/workflows/publish.yml

@@ -0,0 +1,118 @@
+name: Publish to PyPI (Tag Release)
+
+on:
+  push:
+    # branches: ["main"]
+    tags:
+      - 'v*'  # Runs when a tag like v1.2.3 is pushed
+
+permissions:
+  contents: read
+
+jobs:
+  build_wheels:
+    name: Build wheels
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.13"
+
+      - name: Install Poetry
+        run: |
+          python -m pip install --upgrade pip
+          pip install poetry
+
+      - name: Configure Poetry
+        run: poetry config virtualenvs.create true && poetry lock
+
+      - name: Install dependencies
+        run: poetry install --no-interaction --no-root --with dev
+
+      - name: Check formatting
+        run: |
+          poetry run black --check $(find hipopy/ -name '*.py') $(find tests/ -name '*.py')
+          poetry run pylint $(find hipopy/ -name '*.py')
+
+      - name: Build package wheel
+        run: |
+          poetry build
+
+      - name: Upload built wheels
+        uses: actions/upload-artifact@v4
+        with:
+          name: wheels
+          path: dist/*.whl
+
+  publish_testpypi:
+    name: Publish to TestPyPI
+    needs: build_wheels
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.13"
+
+      - uses: actions/download-artifact@v4
+        with:
+          path: dist
+      - name: Upload to TestPyPI
+        run: |
+          pip install --upgrade pip poetry
+          ls -lrth dist
+          mkdir -p dist_flat
+          cp dist/**/*.whl dist_flat/
+          rm -rf dist
+          mv dist_flat dist
+          ls -lrth dist
+          poetry config repositories.testpypi https://test.pypi.org/legacy/
+          echo poetry publish -r testpypi -u __token__ -p ${{ secrets.TESTPYPI_API_TOKEN }}
+
+  publish:
+    name: Publish to PyPI
+    needs: publish_testpypi
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.13"
+
+      - name: Download distributions
+        uses: actions/download-artifact@v4
+        with:
+          path: dist
+
+      - uses: actions/download-artifact@v4
+        with:
+          path: dist
+      - name: Upload to PyPI
+        run: |
+          pip install --upgrade pip poetry
+          mkdir -p dist_flat
+          cp dist/**/*.whl dist_flat/
+          rm -rf dist
+          mv dist_flat dist
+          ls -lrth dist
+          echo poetry publish -u __token__ -p ${{ secrets.PYPI_API_TOKEN }}