remove lib2to3 usage

1 files changed, 12 insertions, 32 deletions

diff --git a/setuptools/command/build_py.py b/setuptools/command/build_py.py
index df6fd323..6a615433 100644
--- a/setuptools/command/build_py.py
+++ b/setuptools/command/build_py.py
@@ -10,20 +10,12 @@ import itertools
 import stat
 from setuptools.extern.more_itertools import unique_everseen
 
-try:
-    from setuptools.lib2to3_ex import Mixin2to3
-except Exception:
-
-    class Mixin2to3:
-        def run_2to3(self, files, doctests=True):
-            "do nothing"
-
 
 def make_writable(target):
     os.chmod(target, os.stat(target).st_mode | stat.S_IWRITE)
 
 
-class build_py(orig.build_py, Mixin2to3):
+class build_py(orig.build_py):
     """Enhanced 'build_py' command that includes data files with packages
 
     The data files are specified via a 'package_data' argument to 'setup()'.
@@ -36,12 +28,10 @@ class build_py(orig.build_py, Mixin2to3):
     def finalize_options(self):
         orig.build_py.finalize_options(self)
         self.package_data = self.distribution.package_data
-        self.exclude_package_data = (self.distribution.exclude_package_data or
-                                     {})
+        self.exclude_package_data = self.distribution.exclude_package_data or {}
         if 'data_files' in self.__dict__:
             del self.__dict__['data_files']
         self.__updated_files = []
-        self.__doctests_2to3 = []
 
     def run(self):
         """Build modules, packages, and copy data files to build directory"""
@@ -55,10 +45,6 @@ class build_py(orig.build_py, Mixin2to3):
             self.build_packages()
             self.build_package_data()
 
-        self.run_2to3(self.__updated_files, False)
-        self.run_2to3(self.__updated_files, True)
-        self.run_2to3(self.__doctests_2to3, True)
-
         # Only compile actual .py files, using our base class' idea of what our
         # output files are.
         self.byte_compile(orig.build_py.get_outputs(self, include_bytecode=0))
@@ -71,8 +57,7 @@ class build_py(orig.build_py, Mixin2to3):
         return orig.build_py.__getattr__(self, attr)
 
     def build_module(self, module, module_file, package):
-        outfile, copied = orig.build_py.build_module(self, module, module_file,
-                                                     package)
+        outfile, copied = orig.build_py.build_module(self, module, module_file, package)
         if copied:
             self.__updated_files.append(outfile)
         return outfile, copied
@@ -123,9 +108,6 @@ class build_py(orig.build_py, Mixin2to3):
                 outf, copied = self.copy_file(srcfile, target)
                 make_writable(target)
                 srcfile = os.path.abspath(srcfile)
-                if (copied and
-                        srcfile in self.distribution.convert_2to3_doctests):
-                    self.__doctests_2to3.append(outf)
 
     def analyze_manifest(self):
         self.manifest_files = mf = {}
@@ -202,18 +184,11 @@ class build_py(orig.build_py, Mixin2to3):
             package,
             src_dir,
         )
-        match_groups = (
-            fnmatch.filter(files, pattern)
-            for pattern in patterns
-        )
+        match_groups = (fnmatch.filter(files, pattern) for pattern in patterns)
         # flatten the groups of matches into an iterable of matches
         matches = itertools.chain.from_iterable(match_groups)
         bad = set(matches)
-        keepers = (
-            fn
-            for fn in files
-            if fn not in bad
-        )
+        keepers = (fn for fn in files if fn not in bad)
         # ditch dupes
         return list(unique_everseen(keepers))
 
@@ -241,12 +216,17 @@ def assert_relative(path):
         return path
     from distutils.errors import DistutilsSetupError
 
-    msg = textwrap.dedent("""
+    msg = (
+        textwrap.dedent(
+            """
         Error: setup script specifies an absolute path:
 
             %s
 
         setup() arguments must *always* be /-separated paths relative to the
         setup.py directory, *never* absolute paths.
-        """).lstrip() % path
+        """
+        ).lstrip()
+        % path
+    )
     raise DistutilsSetupError(msg)