def _read_pyproject(self):
# type: () -> None
pyproject = self.path_to("pyproject.toml")
if os.path.exists(pyproject):
self._pyproject = toml.load(pyproject)
build_system = self._pyproject.get("build-system", None)
if not os.path.exists(self.path_to("setup.py")):
if not build_system or not build_system.get("requires"):
build_system = {
"requires": ["setuptools>=40.8.0", "wheel"],
"build-backend": get_default_pyproject_backend(),
}
self._build_system = build_system
def build_backend(self):
# type: () -> str
return self._build_system.get("build-backend",
get_default_pyproject_backend())