Move SETUPTOOLS_SHIM to its own file

pip/download.py

@@ -28,10 +28,10 @@ from pip.exceptions import InstallationError, HashMismatch
 from pip.models import PyPI
 from pip.utils import (splitext, rmtree, format_size, display_path,
                        backup_dir, ask_path_exists, unpack_file,
-                       ARCHIVE_EXTENSIONS, consume, call_subprocess,
-                       SETUPTOOLS_SHIM)
+                       ARCHIVE_EXTENSIONS, consume, call_subprocess)
 from pip.utils.filesystem import check_path_owner
 from pip.utils.logging import indent_log
+from pip.utils.setuptools_build import SETUPTOOLS_SHIM
 from pip.utils.ui import DownloadProgressBar, DownloadProgressSpinner
 from pip.locations import write_delete_marker_file
 from pip.vcs import vcs

pip/req/req_install.py

@@ -32,10 +32,11 @@ from pip.utils import (
     display_path, rmtree, ask_path_exists, backup_dir, is_installable_dir,
     dist_in_usersite, dist_in_site_packages, egg_link_path,
     call_subprocess, read_text_file, FakeFile, _make_build_dir, ensure_dir,
-    get_installed_version, canonicalize_name, SETUPTOOLS_SHIM
+    get_installed_version, canonicalize_name
 )
 from pip.utils.hashes import Hashes
 from pip.utils.logging import indent_log
+from pip.utils.setuptools_build import SETUPTOOLS_SHIM
 from pip.utils.ui import open_spinner
 from pip.req.req_uninstall import UninstallPathSet
 from pip.vcs import vcs

pip/utils/__init__.py

@@ -815,11 +815,3 @@ def canonicalize_name(name):
 def consume(iterator):
     """Consume an iterable at C speed."""
     deque(iterator, maxlen=0)
-
-
-# Shim to wrap setup.py invocation with setuptools
-SETUPTOOLS_SHIM = (
-    "import setuptools, tokenize;__file__=%r;"
-    "exec(compile(getattr(tokenize, 'open', open)(__file__).read()"
-    ".replace('\\r\\n', '\\n'), __file__, 'exec'))"
-)

pip/utils/setuptools_build.py

@@ -0,0 +1,6 @@
+# Shim to wrap setup.py invocation with setuptools
+SETUPTOOLS_SHIM = (
+    "import setuptools, tokenize;__file__=%r;"
+    "exec(compile(getattr(tokenize, 'open', open)(__file__).read()"
+    ".replace('\\r\\n', '\\n'), __file__, 'exec'))"
+)

pip/wheel.py

@@ -32,9 +32,10 @@ from pip.locations import distutils_scheme, PIP_DELETE_MARKER_FILENAME
 from pip import pep425tags
 from pip.utils import (
     call_subprocess, ensure_dir, captured_stdout, rmtree, canonicalize_name,
-    read_chunks, SETUPTOOLS_SHIM)
+    read_chunks)
 from pip.utils.ui import open_spinner
 from pip.utils.logging import indent_log
+from pip.utils.setuptools_build import SETUPTOOLS_SHIM
 from pip._vendor.distlib.scripts import ScriptMaker
 from pip._vendor import pkg_resources
 from pip._vendor.six.moves import configparser