VertexAI: add support for mock responses versioning system (#6103)

Author: tanzimfh

.github/workflows/check-vertexai-responses.yml

@@ -0,0 +1,40 @@
+name: Check Vertex AI Responses
+
+on: pull_request
+
+jobs:
+  check-version:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Clone mock responses
+        run: firebase-vertexai/update_responses.sh
+      - name: Find cloned and latest versions
+        run: |
+          CLONED=$(git describe --tags)
+          LATEST=$(git tag --sort=v:refname | tail -n1)
+          echo "cloned_tag=$CLONED" >> $GITHUB_ENV
+          echo "latest_tag=$LATEST" >> $GITHUB_ENV
+        working-directory: firebase-vertexai/src/test/resources/vertexai-sdk-test-data
+      - name: Find comment from previous run if exists
+        uses: peter-evans/find-comment@3eae4d37986fb5a8592848f6a574fdf654e61f9e
+        id: fc
+        with:
+          issue-number: ${{github.event.number}}
+          body-includes: Vertex AI Mock Responses Check
+      - name: Comment on PR if newer version is available
+        if: ${{env.cloned_tag != env.latest_tag && !steps.fc.outputs.comment-id}}
+        uses: peter-evans/create-or-update-comment@71345be0265236311c031f5c7866368bd1eff043
+        with:
+          issue-number: ${{github.event.number}}
+          body: >
+            ### Vertex AI Mock Responses Check :warning:
+            
+            A newer major version of the mock responses for Vertex AI unit tests is available.
+            [update_responses.sh](https://github.com/firebase/firebase-android-sdk/blob/main/firebase-vertexai/update_responses.sh)
+            should be updated to clone the latest version of the responses: `${{env.latest_tag}}`
+      - name: Delete comment when version gets updated
+        if: ${{env.cloned_tag == env.latest_tag && steps.fc.outputs.comment-id}}
+        uses: detomarco/delete-comment@850734dd44d8b15fef55b45252613b903ceb06f0
+        with:
+          comment-id: ${{ steps.fc.outputs.comment-id }}

firebase-vertexai/update_responses.sh

@@ -17,6 +17,19 @@
 # This script replaces mock response files for Vertex AI unit tests with a fresh
 # clone of the shared repository of Vertex AI test data.
 
+RESPONSES_VERSION='v1.*' # The major version of mock responses to use
+REPO_NAME="vertexai-sdk-test-data"
+REPO_LINK="https://github.com/FirebaseExtended/$REPO_NAME.git"
+
 cd "$(dirname "$0")/src/test/resources" || exit
-rm -rf vertexai-sdk-test-data
-git clone --depth 1 https://github.com/FirebaseExtended/vertexai-sdk-test-data.git
+rm -rf "$REPO_NAME"
+git clone "$REPO_LINK" --quiet || exit
+cd "$REPO_NAME" || exit
+
+# Find and checkout latest tag matching major version
+TAG=$(git tag -l "$RESPONSES_VERSION" --sort=v:refname | tail -n1)
+if [ -z "$TAG" ]; then
+  echo "Error: No tag matching '$RESPONSES_VERSION' found in $REPO_NAME"
+  exit
+fi
+git checkout "$TAG" --quiet