Refactor Python publish workflow for releases

Updated the workflow to publish Python packages using Twine and added steps for signing and uploading artifacts to GitHub Releases.

Author: douden

.github/workflows/python-publish.yml

@@ -0,0 +1,132 @@
+# This workflow will upload a Python Package using Twine when a release is created
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python#publishing-to-package-registries
+
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+
+name: Publish This Package to PyPI
+
+on:
+  push
+
+jobs:
+  build:
+    name: Build distribution
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        persist-credentials: false
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: "3.x"
+    - name: Install pypa/build
+      run: >-
+        python3 -m
+        pip install
+        build
+        --user
+    - name: Build a binary wheel and a source tarball
+      run: python3 -m build
+    - name: Store the distribution packages
+      uses: actions/upload-artifact@v4
+      with:
+        name: python-package-distributions
+        path: dist/
+
+  publish-to-pypi:
+    name: >-
+      Publish Python distribution to PyPI
+    if: startsWith(github.ref, 'refs/tags/') # only publish to PyPI on tag pushes
+    needs:
+    - build
+    runs-on: ubuntu-latest
+    environment:
+      name: pypi
+      url: https://pypi.org/p/sphinx-github-alerts
+    permissions:
+      id-token: write  # IMPORTANT: mandatory for trusted publishing
+
+    steps:
+    - name: Download all the dists
+      uses: actions/download-artifact@v4
+      with:
+        name: python-package-distributions
+        path: dist/
+    - name: Publish distribution to PyPI
+      uses: pypa/gh-action-pypi-publish@release/v1
+
+  github-release:
+    name: >-
+      Sign the Python distribution with Sigstore
+      and upload them to GitHub Release
+    needs:
+    - publish-to-pypi
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: write  # IMPORTANT: mandatory for making GitHub Releases
+      id-token: write  # IMPORTANT: mandatory for sigstore
+
+    steps:
+    - name: Download all the dists
+      uses: actions/download-artifact@v4
+      with:
+        name: python-package-distributions
+        path: dist/
+    - name: Sign the dists with Sigstore
+      uses: sigstore/[email protected]
+      with:
+        inputs: >-
+          ./dist/*.tar.gz
+          ./dist/*.whl
+
+    - name: Determine Release Tag
+      id: release_tag
+      run: echo "GITHUB_REF_NAME=${GITHUB_REF#refs/tags/}" >> $GITHUB_ENV
+
+    - name: Check if release exists
+      id: check_release 
+      env:
+        GITHUB_TOKEN: ${{ github.token }}
+      run: |
+        if gh release view "$GITHUB_REF_NAME" --repo "$GITHUB_REPOSITORY"; then
+          echo "RELEASE_EXISTS=true" >> $GITHUB_ENV
+        else 
+          echo "RELEASE_EXISTS=false" >> $GITHUB_ENV
+        fi
+
+    - name: Create GitHub Release (if not exists)
+      if: env.RELEASE_EXISTS == 'false'
+      env:
+        GITHUB_TOKEN: ${{ github.token }}
+      run: >-
+        gh release create
+        "$GITHUB_REF_NAME"
+        --repo "$GITHUB_REPOSITORY"
+        --notes "Release $GITHUB_REF_NAME"
+
+    - name: Mark as Latest Release (if created)
+      if: env.RELEASE_EXISTS == 'false'
+      env:
+        GITHUB_TOKEN: ${{ github.token }}
+      run: >-
+        gh release edit 
+        "$GITHUB_REF_NAME" 
+        --repo "$GITHUB_REPOSITORY" 
+        --latest
+
+    - name: Upload artifact signatures to GitHub Release
+      env:
+        GITHUB_TOKEN: ${{ github.token }}
+      # Upload to GitHub Release using the `gh` CLI.
+      # `dist/` contains the built packages, and the
+      # sigstore-produced signatures and certificates.
+      run: >-
+        gh release upload
+        "$GITHUB_REF_NAME" dist/**
+        --repo "$GITHUB_REPOSITORY"