Put setuptools_scm config to pyproject.toml

pyproject.toml

@@ -36,6 +36,9 @@ pyraf = "pyraf:main"
 requires = ["setuptools", "setuptools_scm"]
 build-backend = "setuptools.build_meta"
 
+[tool.setuptools_scm]
+version_file = "pyraf/version.py"
+
 [tool.pytest.ini_options]
 minversion = "6.0"
 addopts = "-s"

setup.py

@@ -4,16 +4,14 @@
 
 from setuptools import setup, Extension
 
-modules = []
+modules = None
 
 # On a Mac, xutil is not required since the graphics is done directly with Aqua.
 # If one still wants to include it, the parameters
 #     library_dirs="/usr/X11/libs"
 #     include_dirs="/usr/X11/include"
 # need to be added to the Extension
-if platform.system() not in ('Darwin', 'Windows'):
-    modules.append(Extension('pyraf.xutil', ['pyraf/xutil.c'],
-                             libraries=['X11']))
+if platform.system() not in ("Darwin", "Windows"):
+    modules = [Extension("pyraf.xutil", ["pyraf/xutil.c"], libraries=["X11"])]
 
-setup(ext_modules=modules,
-      use_scm_version={'write_to': os.path.join('pyraf', 'version.py')})
+setup(ext_modules=modules)