Add pypi workflow

.github/workflows/pypi-ci.yml

@@ -0,0 +1,82 @@
+name: Python CI/CD
+
+on:
+  push:
+    branches: [ '**' ]
+    tags-ignore: [ '**' ]
+  pull_request:
+  workflow_dispatch:
+  release:
+    types:
+      - published
+  schedule:
+  # * is a special character in YAML so you have to quote this string
+  # Execute a "weekly" build at 2 AM UTC on Thursday
+  - cron:  '0 2 * * *'
+
+jobs:
+
+  build_wheels:
+    name: Build wheels [${{ matrix.os }}]
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version:
+          - 3.8
+        os:
+          - ubuntu-20.04
+          # - macos-latest
+          # - windows-latest
+
+    steps:
+
+      - uses: actions/checkout@master
+      - run: git fetch --prune --unshallow
+
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install cibuildwheel
+        run: pip install cibuildwheel
+
+      - name: Build wheels
+        run: python -m cibuildwheel --output-dir wheelhouse
+        env:
+          CIBW_BUILD_VERBOSITY: 1
+          CIBW_BUILD: cp37-* cp38-* cp39-*
+          CIBW_TEST_COMMAND: "python -c 'import icub_models'"
+
+      - uses: actions/upload-artifact@v2
+        with:
+          name: dist
+          path: ./wheelhouse/*.whl
+
+  upload_pypi:
+    needs:
+      - build_sdist
+      - build_wheels
+    runs-on: ubuntu-latest
+    # Devel branch produces pre-releases.
+    # Master branch produces stable releases linked to GitHub releases.
+
+    steps:
+
+      - uses: actions/download-artifact@v2
+        with:
+          name: dist
+          path: dist
+
+      - name: Inspect dist folder
+        run: ls -lah dist/
+
+      - uses: pypa/gh-action-pypi-publish@master
+        if: |
+          github.repository == 'robotology/icub-models' &&
+          ((github.event_name == 'release' && github.event.action == 'published') ||
+           (github.event_name == 'push' && github.ref == 'refs/heads/devel'))
+        with:
+          user: __token__
+          password: ${{ secrets.PYPI_TOKEN }}