refactor: build examples via makefile target

.github/workflows/on-pull-request.yml

@@ -67,19 +67,17 @@ jobs:
           distribution: 'corretto'
 
       - name: Build examples
-        uses: gradle/gradle-build-action@v2
         id: validation
         continue-on-error: true
-        with:
-          build-root-directory: ./examples
-          arguments: clean build
-
-      - name: Send CI failure mail
-        if: ${{ steps.validation.outcome == 'failure' }}
-        uses: momentohq/standards-and-practices/github-actions/error-email-action@gh-actions-v1
-        with:
-          username: ${{secrets.MOMENTO_ROBOT_GMAIL_USERNAME}}
-          password: ${{secrets.MOMENTO_ROBOT_GMAIL_PASSWORD}}
+        run: make build-examples
+
+# TODO: set up email secrets
+#      - name: Send CI failure mail
+#        if: ${{ steps.validation.outcome == 'failure' }}
+#        uses: momentohq/standards-and-practices/github-actions/error-email-action@gh-actions-v1
+#        with:
+#          username: ${{secrets.MOMENTO_ROBOT_GMAIL_USERNAME}}
+#          password: ${{secrets.MOMENTO_ROBOT_GMAIL_PASSWORD}}
 
       - name: Flag Job Failure
         if: ${{ steps.validation.outcome == 'failure' }}

Makefile

@@ -11,6 +11,10 @@ clean:
 build:
 	./gradlew assemble
 
+## Build the examples
+build-examples:
+	cd ./examples && ./gradlew assemble
+
 ## Run all the tests
 test: test-momento test-redis