Support pyproject.toml features with older python

.github/workflows/pytest.yaml

@@ -10,12 +10,17 @@ env:
 jobs:
   pytest:
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        version: ["3.10", "3.11", "3.12"]
+
     steps:
       - uses: actions/checkout@v4
 
       - uses: actions/setup-python@v5
         with:
-          python-version-file: .python-version
+          python-version: ${{ matrix.version }}
 
       - name: Install Dependencies
         run: make install

paracelsus/pyproject.py

@@ -1,8 +1,12 @@
 import os
-import tomllib
 from pathlib import Path
 from typing import Any, Dict
 
+try:
+    import tomllib
+except:  # noqa: E722
+    import toml as tomllib  # type: ignore
+
 
 def get_pyproject_settings(dir: Path = Path(os.getcwd())) -> Dict[str, Any] | None:
     pyproject = dir / "pyproject.toml"
@@ -11,6 +15,6 @@ def get_pyproject_settings(dir: Path = Path(os.getcwd())) -> Dict[str, Any] | No
         return None
 
     with open(pyproject, "rb") as f:
-        data = tomllib.load(f)
+        data = tomllib.loads(f.read().decode())
 
     return data.get("tool", {}).get("paracelsus", None)

pyproject.toml

@@ -7,7 +7,8 @@ authors = [{"name" = "Robert Hafner"}]
 dependencies = [
   "pydot",
   "sqlalchemy",
-  "typer"
+  "typer",
+  "toml; python_version < '3.11'"
 ]
 description = ""
 dynamic = ["version"]

tests/assets/example/models.py

@@ -1,11 +1,13 @@
-from datetime import UTC, datetime
+from datetime import datetime, timezone
 from uuid import uuid4
 
 from sqlalchemy import Boolean, DateTime, ForeignKey, String, Text, Uuid
 from sqlalchemy.orm import mapped_column
 
 from .base import Base
 
+UTC = timezone.utc
+
 
 class User(Base):
     __tablename__ = "users"

tests/conftest.py

@@ -1,14 +1,16 @@
 import os
 import shutil
 import tempfile
-from datetime import UTC, datetime
+from datetime import datetime, timezone
 from pathlib import Path
 from uuid import uuid4
 
 import pytest
 from sqlalchemy import Boolean, DateTime, ForeignKey, String, Text, Uuid
 from sqlalchemy.orm import declarative_base, mapped_column
 
+UTC = timezone.utc
+
 
 @pytest.fixture
 def metaclass():