ci: combine coverage from the run

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

.github/workflows/test.yml

@@ -51,6 +51,8 @@ jobs:
 
     steps:
       - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
 
       - name: Setup python for test ${{ matrix.py }}
         uses: actions/setup-python@v4
@@ -95,10 +97,9 @@ jobs:
         if: matrix.tox-target == 'tox' && matrix.py == '3.10'
         run: tox -e path
 
-      - name: Rename coverage report file
-        if: matrix.tox-target == 'tox'
-        run: mv ".tox/coverage.${BASE}.xml" .tox/coverage.xml
-        shell: bash
+      - name: Combine coverage files
+        if: always()
+        run: tox -e coverage
 
       - uses: codecov/codecov-action@v3
         if: always()

tox.ini

@@ -47,6 +47,7 @@ commands =
 description = verify build can run from source (bootstrap)
 setenv =
     PYTHONPATH = {toxinidir}/src
+    COVERAGE_FILE = {toxworkdir}/.coverage.{envname}
 commands_pre =
     python -E -m pip uninstall -y build colorama
 
@@ -59,9 +60,8 @@ commands =
 [testenv:{py311, py310, py39, py38, py37, py36, pypy37, pypy38, pypy39}-min]
 description = check minimum versions required of all dependencies
 skip_install = true
-commands =
+commands_pre =
     pip install .[test] -c tests/constraints.txt
-    pytest -ra {posargs:-n auto}
 
 [testenv:docs]
 description = build documentations
@@ -88,11 +88,9 @@ commands =
 description = combine coverage from test environments
 passenv =
     DIFF_AGAINST
-setenv =
-    COVERAGE_FILE = {toxworkdir}/.coverage
 skip_install = true
 deps =
-    coverage>=5.1
+    coverage[toml]>=5.1
     diff_cover>=3
 parallel_show_output = true
 commands =