ci: report pytest coverage in PR via codecov

Fixes: #1915

.github/workflows/_python.yml

@@ -77,3 +77,9 @@ jobs:
       - name: Test
         run: make test
         working-directory: ${{ inputs.context }}
+
+      - name: Report coverage
+        uses: codecov/codecov-action@v3
+        with:
+          files: ${{ inputs.context }}/coverage.xml
+          name: ${{ inputs.context }}

tools/python.mk

@@ -63,7 +63,7 @@ install: $(VENV)
 .PHONY: .pytest
 .pytest: $(VENV)
 	source $(VENV)/bin/activate
-	pytest -n $(CPU_CORES) --color=yes -v $(PYTEST_ARG)
+	pytest -n $(CPU_CORES) --color=yes -v --cov-report term --cov-report xml:./coverage.xml $(PYTEST_ARG)
 
 .PHONY: .clean
 .clean: