feat(ci): Add release workflow

This adds a workflow to build the Python package when a tag matching `feature_artifacts-helper_*` is created. It will upload the build artifacts (`tar.gz` sdist and `.whl` bdist).

There is also the option of automatically creating a release and
attaching the build artifacts to it. See
eebf0a5 and
https://github.com/delilahw/codespace-features/releases/tag/feature_artifacts-helper_1.1-alpha
for an example.

Author: delilahw

.github/workflows/release-keyring.yaml

@@ -0,0 +1,37 @@
+name: Artifacts Helper Keyring Releases
+
+on:
+  push:
+    tags:
+      - "feature_artifacts-helper_*"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    defaults:
+      run:
+        working-directory: src/artifacts-helper/codespaces_artifacts_helper_keyring
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: wntrblm/nox@main
+        with:
+          python-versions: "3.11, 3.12"
+
+      - name: Setup PDM
+        uses: pdm-project/setup-pdm@v4
+        with:
+          version: "2.15.1"
+          python-version-file: "src/artifacts-helper/codespaces_artifacts_helper_keyring/pyproject.toml"
+
+      - name: Run nox release
+        run: pdm release
+
+      - name: Upload build artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: codespaces_artifacts_helper_keyring
+          path: |
+            src/artifacts-helper/codespaces_artifacts_helper_keyring/dist

src/artifacts-helper/codespaces_artifacts_helper_keyring/noxfile.py

@@ -61,3 +61,14 @@ def mypy(session):
     session.run_always("pdm", "install", external=True)
     args = session.posargs or LOCATIONS
     session.run("mypy", *args)
+
+
+@nox.session(py=DEFAULT_PYTHON_VERSION)
+def release(session):
+    """Build the package only.
+
+    Usually, this would also upload the package to PyPI, but we only publish to
+    GitHub Releases in this project. See the `release-keyring.yaml` workflow.
+    """
+    session.run_always("pdm", "install", external=True)
+    session.run("pdm", "build", external=True)