fixing coverage

.github/workflows/ci.yml

@@ -56,18 +56,18 @@ jobs:
         lcov --remove coverage.info '/usr/*' --output-file coverage.info
         lcov --list coverage.info
   
-    - name: Combine coverage reports
-      run: |
-        lcov --add-tracefile coverage.info --output-file combined.info
-        coverage combine
-        coverage xml -o combined_coverage.xml
+    - name: Upload Python coverage to Codecov
+      uses: codecov/codecov-action@v2
+      with:
+        files: ./coverage.xml
+        flags: python
+        name: python-coverage
+        fail_ci_if_error: true
 
-    - name: Upload coverage to Codecov
+    - name: Upload C++ coverage to Codecov
       uses: codecov/codecov-action@v2
       with:
-        files: |
-          ./coverage.info
-          ./combined_coverage.xml
-        flags: unittests
-        name: codecov-umbrella
+        files: ./coverage.info
+        flags: cpp
+        name: cpp-coverage
         fail_ci_if_error: true

README.md

@@ -4,7 +4,8 @@ GBRL is a Python-based Gradient Boosting Trees (GBT) library, similar to popular
 [![Build Status](https://img.shields.io/github/workflow/status/Nvlabs/gbrl/CI)](https://github.com/NVlabs/gbrl/actions)
 [![License](https://img.shields.io/badge/license-NVIDIA-green.svg)](https://nvlabs.github.io/gbrl/license.htm)
 [![PyPI version](https://badge.fury.io/py/gbrl.svg)](https://badge.fury.io/py/gbrl)
-[![codecov](https://codecov.io/gh/Nvlabs/gbrl/branch/master/graph/badge.svg)](https://codecov.io/gh/Nvlabs/gbrl)
+[![Python Coverage](https://codecov.io/gh/Nvlabs/gbrl/branch/master/graph/badge.svg?flag=python)](https://codecov.io/gh/Nvlabs/gbrl)
+[![C++ Coverage](https://codecov.io/gh/Nvlabs/gbrl/branch/master/graph/badge.svg?flag=cpp)](https://codecov.io/gh/Nvlabs/gbrl)
 
 ## Overview