python bindings: fix builds for pre-pyproject setuptools

openSUSE Leap only has setuptools 44, which predates support for pyproject. This is fine, we just need to add the relevant metadata to the setuptools invocation. To reduce the amount of places we duplicate this information, just load pyproject.toml and read the values out (this does add a dependency on toml for pre-3.11 Python versions but that's fine). Signed-off-by: Aleksa Sarai <[email protected]>
openSUSE · Sep 17, 2024 · dc51be7 · dc51be7
1 parent 2d7324b
commit dc51be7
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diff --git a/contrib/bindings/python/pyproject.toml b/contrib/bindings/python/pyproject.toml
@@ -17,7 +17,7 @@
 
 [build-system]
 requires = [
-	"setuptools>=68",
+	"setuptools>=61",
 	"wheel",
 	"cffi>=1.10.0"
 ]

diff --git a/contrib/bindings/python/setup.py b/contrib/bindings/python/setup.py
@@ -17,7 +17,27 @@
 
 import setuptools
 
+# This is only needed for backwards compatibility with older versions.
+def parse_pyproject():
+	try:
+		import tomllib
+		openmode = "rb"
+	except ImportError:
+		# For pre-3.11 Python support.
+		import toml as tomllib
+		openmode = "r"
+
+	with open("pyproject.toml", openmode) as f:
+		return tomllib.load(f)
+
+pyproject = parse_pyproject()
+
 setuptools.setup(
+	# For backwards-compatibility with pre-pyproject setuptools.
+	name=pyproject["project"]["name"],
+	version=pyproject["project"]["version"],
+	install_requires=pyproject["project"]["dependencies"],
+	# Configure cffi building.
 	ext_package="pathrs",
 	platforms=["Linux"],
 	cffi_modules=["pathrs/pathrs_build.py:ffibuilder"],