Add workflow to publish to pypi

Author: rmjarvis

.github/workflows/publish.yml

@@ -0,0 +1,42 @@
+name: Build sdist and upload to PyPI
+
+on:
+  workflow_dispatch:
+  release:
+    types:
+      - published
+
+jobs:
+
+  build_sdist:
+    name: Build sdist and upload to PyPI
+    runs-on: ubuntu-latest
+
+    environment:
+      name: pypi
+      url: https://pypi.org/p/Piff
+    permissions:
+      id-token: write  # IMPORTANT: this permission is mandatory for trusted publishing
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.13"
+
+      - name: Install dependencies
+        run: |
+          python -m pip install -U pip
+          pip install -U -r requirements.txt
+
+      - name: Build sdist
+        run: |
+          python setup.py sdist
+          ls -l dist
+          tar tvfz dist/*.tar.gz
+
+      - name: Publish to PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+            verbose: true