build: fix code coverage aggregate upload

Author: dougwilson

.github/workflows/ci.yml

@@ -162,6 +162,7 @@ jobs:
       run: |
         if npm -ps ls nyc | grep -q nyc; then
           npm run test-ci
+          cp coverage/lcov.info "coverage/${{ matrix.name }}.lcov"
         else
           npm test
         fi
@@ -171,19 +172,43 @@ jobs:
       run: npm run lint
 
     - name: Collect code coverage
-      uses: coverallsapp/github-action@master
+      if: steps.list_env.outputs.nyc != ''
+      run: |
+        if [[ -d ./coverage ]]; then
+          mv ./coverage "./${{ matrix.name }}"
+          mkdir ./coverage
+          mv "./${{ matrix.name }}" "./coverage/${{ matrix.name }}"
+        fi
+
+    - name: Upload code coverage
+      uses: actions/upload-artifact@v2
       if: steps.list_env.outputs.nyc != ''
       with:
-        github-token: ${{ secrets.GITHUB_TOKEN }}
-        flag-name: run-${{ matrix.test_number }}
-        parallel: true
+        name: coverage
+        path: ./coverage
+        retention-days: 1
 
   coverage:
     needs: test
     runs-on: ubuntu-latest
     steps:
-    - name: Uploade code coverage
+    - uses: actions/checkout@v2
+
+    - name: Install lcov
+      shell: bash
+      run: sudo apt-get -y install lcov
+
+    - name: Collect coverage reports
+      uses: actions/download-artifact@v2
+      with:
+        name: coverage
+        path: ./coverage
+
+    - name: Merge coverage reports
+      shell: bash
+      run: find ./coverage -name lcov.info -exec printf '-a %q\n' {} \; | xargs lcov -o ./coverage/lcov.info
+
+    - name: Upload coverage report
       uses: coverallsapp/github-action@master
       with:
-        github-token: ${{ secrets.github_token }}
-        parallel-finished: true
+        github-token: ${{ secrets.GITHUB_TOKEN }}