Create code coverage during the CI builds

The code coverage is only created for one PHP version (the highest version)
per build as there is no point to have multiple code coverage uploads
for the same code change.

Author: oliverklee

.github/workflows/ci.yml

@@ -39,16 +39,11 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php-version:
-          - 5.3
-          - 5.4
-          - 5.5
-          - 5.6
-          - 7.0
-          - 7.1
-          - 7.2
-          - 7.3
-          - 7.4
+        php-version: [ '5.3', '5.4', '5.5', '5.6', '7.0', '7.1', '7.2', '7.3' ]
+        coverage: [ 'none' ]
+        include:
+          - php-version: 7.4
+            coverage: xdebug
 
     steps:
       - name: Checkout
@@ -59,7 +54,7 @@ jobs:
         with:
           php-version: ${{ matrix.php-version }}
           tools: composer:v2
-          coverage: none
+          coverage: "${{ matrix.coverage }}"
 
       - name: Cache dependencies installed with composer
         uses: actions/cache@v1
@@ -75,4 +70,11 @@ jobs:
           composer show;
 
       - name: Run Tests
-        run: ./vendor/bin/phpunit
+        run: ./vendor/bin/phpunit --coverage-clover build/coverage/xml
+
+      - name: Upload coverage results to Coveralls
+        if: "${{ matrix.coverage != 'none' }}"
+        env:
+          CODACY_PROJECT_TOKEN: ${{ secrets.CODACY_PROJECT_TOKEN }}
+        run: |
+          ./vendor/bin/codacycoverage clover build/coverage/xml