Replace mkstemp with NamedTemporaryFile in build_meta

Author: abravalheri

setuptools/build_meta.py

@@ -99,14 +99,11 @@ def _patch_distutils_exec():
         return
 
     def _exec(code, global_vars):
-        try:
-            _, tmp = tempfile.mkstemp(suffix="setup.py")
-            with open(tmp, "wb") as f:
-                f.write(code)
-            with tokenize.open(tmp) as f:
+        with tempfile.NamedTemporaryFile(suffix="setup.py") as tmp:
+            tmp.write(code)
+            tmp.close()
+            with tokenize.open(tmp.name) as f:
                 code = f.read().replace(r'\r\n', r'\n')
-        finally:
-            os.remove(tmp)
         orig_exec(code, {**global_vars, "__name__": "__main__"})
 
     distutils.core.exec = _exec