Use UTF-8 for writing python stubs

Since Python3 is "UTF-8 first", this change should not cause problems.

Author: abravalheri

setuptools/command/bdist_egg.py

@@ -54,7 +54,7 @@ def __bootstrap__():
         __bootstrap__()
         """
     ).lstrip()
-    with open(pyfile, 'w') as f:
+    with open(pyfile, 'w', encoding="utf-8") as f:
         f.write(_stub_template % resource)
 
 

setuptools/command/build_ext.py

@@ -342,8 +342,7 @@ def _write_stub_file(self, stub_file: str, ext: Extension, compile=False):
         if compile and os.path.exists(stub_file):
             raise BaseError(stub_file + " already exists! Please delete.")
         if not self.dry_run:
-            f = open(stub_file, 'w')
-            f.write(
+            content = (
                 '\n'.join([
                     "def __bootstrap__():",
                     "   global __bootstrap__, __file__, __loader__",
@@ -369,7 +368,8 @@ def _write_stub_file(self, stub_file: str, ext: Extension, compile=False):
                     "",  # terminal \n
                 ])
             )
-            f.close()
+            with open(stub_file, 'w', encoding="utf-8") as f:
+                f.write(content)
         if compile:
             self._compile_and_remove_stub(stub_file)
 

setuptools/package_index.py

@@ -717,7 +717,7 @@ def gen_setup(self, filename, fragment, tmpdir):
                     shutil.copy2(filename, dst)
                     filename = dst
 
-            with open(os.path.join(tmpdir, 'setup.py'), 'w') as file:
+            with open(os.path.join(tmpdir, 'setup.py'), 'w', encoding="utf-8") as file:
                 file.write(
                     "from setuptools import setup\n"
                     "setup(name=%r, version=%r, py_modules=[%r])\n"