[ci] Merge coverage reports between pytest runs

.github/workflows/python-package-ci.yml

@@ -68,15 +68,13 @@ jobs:
 
     - name: Test with pytest
       run: |
-        pwd
-        mkdir build && cd build
-        pwd
+        mkdir -p build && cd build
         # Run all unit tests under pymtl3 directory except for those in the
         # yosys backend (we run yosys tests in the second run). This is
         # necessary to avoid using the same component name for different
         # shared libraries (Verilog and Yosys backend translation result).
-        pytest --cov-report xml --cov=pymtl3 .. --ignore=pymtl3/passes/backends/yosys --tb=short --hypothesis-profile CI
-        pytest --cov-report xml --cov=pymtl3 pymtl3/passes/backends/yosys --tb=short --hypothesis-profile CI
+        pytest --cov-report xml --cov=pymtl3 ../pymtl3 --ignore=../pymtl3/passes/backends/yosys --tb=short --hypothesis-profile CI
+        pytest --cov-report xml --cov=pymtl3 --cov-append ../pymtl3/passes/backends/yosys --tb=short --hypothesis-profile CI
 
     - name: Upload code coverage report
       run: |