add check-pypi job to build workflow (#188)

.github/workflows/grapl-build.yml

@@ -19,6 +19,58 @@ jobs:
           docker build -f .github/etc/cargo-audit/Dockerfile -t grapl/grapl-cargo-audit:latest src/rust
           docker run -t grapl/grapl-cargo-audit:latest cargo audit
 
+  check-pypi:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        python-version: [3.7]
+
+    steps:
+
+      - uses: actions/checkout@v2
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install pypi-simple
+        run: |
+          python3 -mvenv venv && . venv/bin/activate
+          pip install pypi-simple
+          deactivate
+
+      - name: Check whether grapl_graph_descriptions version has been bumped
+        run: |
+          . venv/bin/activate
+          if [[ "$CHANNEL" == "latest" ]]; then
+              python etc/build_scripts/check_pypi_version.py \
+                grapl_graph_descriptions \
+                $(cat src/rust/graph-descriptions/VERSION)
+          else
+              python etc/build_scripts/check_pypi_version.py \
+                grapl_graph_descriptions \
+                $(cat src/rust/graph-descriptions/VERSION) \
+                true
+          fi
+          deactivate
+
+      - name: Check whether grapl_analyzerlib version has been bumped
+        run: |
+          . venv/bin/activate
+          if [[ "$CHANNEL" == "latest" ]]; then
+              python etc/build_scripts/check_pypi_version.py \
+                grapl_analyzerlib \
+                $(cat src/python/grapl_analyzerlib/VERSION)
+          else
+              python etc/build_scripts/check_pypi_version.py \
+                grapl_analyzerlib \
+                $(cat src/python/grapl_analyzerlib/VERSION) \
+                true
+          fi
+          deactivate
+
   rust-unit-tests:
     runs-on: ubuntu-latest