load_pyproject: Prefer the stdlib's TOML parser when available

bork/filesystem.py

@@ -1,7 +1,10 @@
 from pathlib import Path
 import shutil
 
-import toml  # type: ignore
+try:
+    import tomllib
+except ImportError:
+    import toml as tomllib  # type: ignore
 
 
 def load_pyproject():
@@ -11,7 +14,9 @@ def load_pyproject():
     Will synthesize data if a legacy setuptools project is detected.
     """
     try:
-        return toml.load('pyproject.toml')
+        pyproject = Path.cwd() / 'pyproject.toml'
+        return tomllib.loads(pyproject.read_text())  # Mildly inefficient, but portable
+
     except FileNotFoundError:
         if Path('setup.py').exists() or Path('setup.cfg').exists():
             # Legacy project, use setuptools' legacy backend

pyproject.toml

@@ -28,7 +28,7 @@ dependencies = [
     "wheel~=0.41.2",
     "build~=1.0.3",
     "packaging~=21.3",
-    "toml~=0.10.2",
+    "toml~=0.10.2; python_version < '3.11'",
     "twine==4.0.1",
     "coloredlogs~=15.0.1",
     # pip is used by bork.builder._prepare_zipapp(),