notify when CI job fails

.github/workflows/build_wheels_linux.yml

@@ -56,3 +56,38 @@ jobs:
       upload-to-pypi: cu121
     secrets:
       PYPI_API_TOKEN: ${{ secrets.PYPI_API_TOKEN }}
+  notify:
+    runs-on: ubuntu-latest
+    name: Email notification
+    needs: [generate-matrix, build]
+    if: failure() && github.event_name == 'schedule'
+    steps:
+      - uses: dawidd6/action-send-mail@v4
+        with:
+          server_address: smtp.gmail.com
+          server_port: 465
+          username: torchao.notify
+          password: ${{ secrets.TORCHAO_NOTIFY_PASSWORD }}
+          from: [email protected]
+          to: ${{ secrets.TORCHAO_NOTIFY_RECIPIENT }}
+          subject: breakbutterflyScheduled Build Failure for TorchAO
+          body: |
+            Build Failure Notification for TorchAO
+
+            A failure occurred in the Build Linux Wheels workflow.
+
+            Run Details:
+            - Workflow: ${{ github.workflow }}
+            - Run Type: ${{ github.event_name }}
+            - Repository: ${{ github.repository }}
+            - Branch/PR: ${{ github.ref }}
+            - Commit: ${{ github.sha }}
+
+            You can view the full run details here:
+            ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
+
+            Error Information:
+            ${{ needs.generate-matrix.result == 'failure' && 'Matrix generation failed' || '' }}
+            ${{ needs.build.result == 'failure' && 'Build job failed' || '' }}
+
+            This is an automated notification. Please check the GitHub Actions page for more details about the failure.