chore: build primary sample app

.github/workflows/reusable_build_sample_apps.yml

@@ -37,6 +37,29 @@ jobs:
         with:
           fetch-depth: 0 # Workaround for bug https://github.com/actions/checkout/issues/1471
 
+      - name: Set Default Firebase Distribution Groups
+        run: |
+          # Define all the possible distribution groups
+          ALL_BUILDS_GROUP="all-builds"
+          FEATURE_BUILDS_GROUP="feature-branch"
+          STABLE_BUILDS_GROUP="next"
+          
+          # Initialize with the default distribution group
+          distribution_groups=("$ALL_BUILDS_GROUP")
+          
+          # Determine current app type and Git context
+          is_primary_app=$([[ "${{ matrix.sample-app }}" == "java_layout" ]] && echo "true" || echo "false")
+          current_branch="${GITHUB_REF}"
+          
+          # Append distribution groups based on branch and context if the app is primary
+          if [[ "$is_primary_app" == "true" ]]; then
+            [[ "$current_branch" == "refs/heads/feature/"* ]] && distribution_groups+=("$FEATURE_BUILDS_GROUP")
+            [[ "$current_branch" == "refs/heads/main" ]] && distribution_groups+=("$STABLE_BUILDS_GROUP")
+          fi
+          
+          # Export the groups as an environment variable
+          echo "firebase_distribution_groups=$(IFS=','; echo "${distribution_groups[*]}")" >> $GITHUB_ENV
+
       - name: Get latest SDK version
         if: ${{ inputs.use_latest_sdk_version == true }}
         id: latest-sdk-version-step

samples/fastlane/Fastfile

@@ -65,7 +65,7 @@ platform :android do
     name_of_sample_app_module = File.basename(path_to_root_directory_sample_app) # just get the name of the directory I am in now. `samples/N`
 
     new_app_version = get_new_app_version().gsub("/", ".")
-    test_groups = get_build_test_groups()
+    test_groups = get_build_test_groups(distribution_groups: arguments[:distribution_groups])
     app_package_name = CredentialsManager::AppfileConfig.try_fetch_value(:package_name) # get package_name from Appfile
 
     build_sample_app(