Test sdist installs and works on all platforms

Author: coretl

.github/workflows/code.yml

@@ -85,7 +85,7 @@ jobs:
           CIBW_ENVIRONMENT: PIP_USE_DEPRECATED=out-of-tree-build
           CIBW_BUILD: ${{ matrix.python }}*64
           CIBW_TEST_EXTRAS: dev
-          CIBW_TEST_COMMAND: pytest {project}/tests --cov-report xml:${{ matrix.cov_file }} --junit-xml=${{ matrix.results_file }}
+          CIBW_TEST_COMMAND: python -X faulthandler -m pytest -s {project}/tests --cov-report xml:${{ matrix.cov_file }} --junit-xml=${{ matrix.results_file }}
           # Disable auditwheel as it isn't compatible with setuptools_dso approach
           # https://github.com/mdavidsaver/setuptools_dso/issues/17
           CIBW_REPAIR_WHEEL_COMMAND: ""
@@ -129,8 +129,28 @@ jobs:
         with:
           files: artifacts/**/*.xml
 
-  release:
+  sdist:
     needs: [build]
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        python: [cp36, cp37, cp38, cp39, cp310]
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - uses: actions/download-artifact@v2
+        with:
+          name: dist
+          path: dist
+
+      - name: Install sdist in a venv and check cli works
+        run: pipx run --spec dist/*.tar.gz pythonSoftIOC --version
+        shell: bash
+
+  release:
+    needs: [build, sdist]
     runs-on: ubuntu-latest
     # upload to PyPI and make a release on every tag
     if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')