Migrate from Poetry to PDM (3)

Update test.yml

.github/workflows/test.yml

@@ -11,42 +11,26 @@ jobs:
         shell: bash
     steps:
       - name: Check out repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Set up Python ${{ matrix.python_version }}
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         id: setup-python-env
         with:
           python-version: ${{ matrix.python_version }}
-
-      # try to load cached venv
-      - name: Load cached venv
-        id: cached-poetry-dependencies
-        uses: actions/cache@v3
-        with:
-          path: .venv
-          key: venv-${{ runner.os }}-${{ steps.setup-python-env.outputs.python-version }}-${{ hashFiles('poetry.lock') }}
+          cache: "pip"
 
       # install & configure poetry if cache does not exist
-      - name: Install Poetry
-        if: steps.cached-poetry-dependencies.outputs.cache-hit != 'true'
-        uses: snok/install-poetry@v1
-        with:
-          version: 1.7.1
-          virtualenvs-create: true
-          virtualenvs-in-project: true
-          installer-parallel: true
       - name: Install dependencies
-        if: steps.cached-poetry-dependencies.outputs.cache-hit != 'true'
-        run: poetry install --with=dev
+        run: pip install ".[dev]"
 
       # run tests
       - name: Run pytests
         env:
           GITHUB_REPOSITORY: ${{ github.action_repository }}
           GITHUB_ACCESS_TOKEN: ${{ github.token }}
-        run: .venv/bin/python -m pytest tests/ -m "library"
+        run: python -m pytest tests/ -m "library"
 
       - name: Check whether code formatting is correct
         run: |
-          .venv/bin/python -m yapf em27_metadata --recursive --quiet
-          .venv/bin/python -m yapf tests --recursive --quiet
+          python -m yapf em27_metadata --recursive --quiet
+          python -m yapf tests --recursive --quiet

tests/test_static_types.py

@@ -1,17 +1,22 @@
 import os
+import sys
 import pytest
 
+PROJECT_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+
 
 @pytest.mark.library
 def test_static_types() -> None:
     print("removing old mypy cache")
-    r1 = os.system("rm -rf .mypy_cache")
+    r1 = os.system(f"cd {PROJECT_DIR} && rm -rf .mypy_cache")
     assert r1 == 0, "command returned non-zero exit code"
 
     print("checking em27_metadata/")
-    r2 = os.system(".venv/bin/python -m mypy em27_metadata/")
+    r2 = os.system(
+        f"cd {PROJECT_DIR} && {sys.executable} -m mypy em27_metadata/"
+    )
     assert r2 == 0, "command returned non-zero exit code"
 
     print("checking tests/")
-    r3 = os.system(".venv/bin/python -m mypy tests/")
+    r3 = os.system(f"cd {PROJECT_DIR} && {sys.executable} -m mypy tests/")
     assert r3 == 0, "command returned non-zero exit code"