install venv

Author: JoeWang1127

.cloudbuild/library_generation/cloudbuild-library-generation-integration-test.yaml

@@ -48,13 +48,15 @@ steps:
       apt-get update
       apt-get -y install \
         docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin \
-        maven python3-pip
+        maven
       # Install python dependencies
-      pip3 install --upgrade pip
-      pip3 install --require-hashes -r hermetic_build/common/requirements.txt
-      pip3 install hermetic_build/common
-      pip3 install --require-hashes -r hermetic_build/library_generation/requirements.txt
-      pip3 install hermetic_build/library_generation
+      python3 -m venv .venv
+      source .venv/bin/activate
+      pip install --upgrade pip
+      pip install --require-hashes -r hermetic_build/common/requirements.txt
+      pip install hermetic_build/common
+      pip install --require-hashes -r hermetic_build/library_generation/requirements.txt
+      pip install hermetic_build/library_generation
       python3 -m unittest hermetic_build/library_generation/tests/integration_tests.py
   waitFor: ["-"]
   id: integration-test