fix(ci): use system python to run tests

Author: dairiki

.github/workflows/tests.yml

@@ -27,6 +27,7 @@ jobs:
 
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5
+      id: setup-python
       with:
         python-version: ${{ matrix.python-version }}
         allow-prereleases: true
@@ -35,6 +36,8 @@ jobs:
       uses: pypa/hatch@257e27e51a6a5616ed08a39a408a21c35c9931bc
 
     - run: hatch run full
+      env:
+        HATCH_PYTHON: ${{ steps.setup-python.outputs.python-path }}
 
     - uses: actions/upload-artifact@v4
       with:
@@ -51,16 +54,17 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
-    - uses: actions/setup-python@v5
-      with:
-        python-version: "3.x"
+
     - name: Install hatch
       uses: pypa/hatch@257e27e51a6a5616ed08a39a408a21c35c9931bc
+
     - uses: actions/download-artifact@v4
       with:
           pattern: coverage-*
           merge-multiple: true
+
     - run: hatch run coverage combine
+
     - run: hatch run coverage report --fail-under 100 --show-missing
 
   lint:
@@ -103,9 +107,6 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - uses: actions/setup-python@v5
-        with:
-          python-version: 3.x
 
       - name: Install hatch
         uses: pypa/hatch@257e27e51a6a5616ed08a39a408a21c35c9931bc