Switch the build system to flit_core

Fixes #72

prebuild.py

@@ -50,16 +50,16 @@ def generate_setup_cfg() -> None:
 		'long_description_content_type': "text/x-rst",
 		'name': config['project']['name'],
 		'url': config['project']['urls']['Source Code'],
-		'version': f"attr: {config['tool']['setuptools']['dynamic']['version']['attr']}",
+		'version': "attr: pathspec._meta.__version__",
 	}
 	output['options'] = {
 		'packages': "find:",
 		'python_requires': config['project']['requires-python'],
-		'setup_requires': ", ".join(config['build-system']['requires']),
+		'setup_requires': "setuptools>=40.8.0",
 		'test_suite': "tests",
 	}
 	output['options.packages.find'] = {
-		'include': ", ".join(config['tool']['setuptools']['packages']['find']['include'])
+		'include': "pathspec, pathspec.*",
 	}
 
 	with open("setup.cfg", 'w', encoding='utf8') as fh:

pyproject.toml

@@ -1,6 +1,6 @@
 [build-system]
-build-backend = "setuptools.build_meta"
-requires = ["setuptools>=40.8.0"]
+build-backend = "flit_core.buildapi"
+requires = ["flit_core >=3.2,<4"]
 
 [project]
 authors = [
@@ -34,9 +34,3 @@ requires-python = ">=3.7"
 "Source Code" = "https://github.com/cpburnz/python-pathspec"
 "Documentation" = "https://python-path-specification.readthedocs.io/en/latest/index.html"
 "Issue Tracker" = "https://github.com/cpburnz/python-pathspec/issues"
-
-[tool.setuptools.dynamic]
-version = {attr = "pathspec._meta.__version__"}
-
-[tool.setuptools.packages.find]
-include = ["pathspec", "pathspec.*"]