test building from the tarball

FUTURE_COPYBARA_INTEGRATE_REVIEW=#1073 from anthrotype:py-long-description 4541387
PiperOrigin-RevId: 563749441

.github/workflows/build_test.yml

@@ -357,3 +357,28 @@ jobs:
         python -VV
         python -c "import sys; sys.exit('Invalid python version') if '.'.join(map(str,sys.version_info[0:2])) != '${{ matrix.python_version }}' else True"
         python setup.py ${{ matrix.py_setuptools_cmd || 'test'}}
+
+  archive_build:
+    name: Build and test from archive
+    runs-on: 'ubuntu-latest'
+    defaults:
+      run:
+        shell: bash
+    steps:
+
+    - name: Checkout the source
+      uses: actions/checkout@v3
+      with:
+        submodules: false
+        fetch-depth: 1
+
+    - name: Archive
+      run: |
+        git archive HEAD -o archive.tgz
+
+    - name: Extract
+      run: |
+        mkdir archive
+        cd archive
+        tar xvzf ../archive.tgz
+        ls