python-setuptools/remove-more-itertools-dependency-cycle.patch

From: Antonio Larrosa <alarrosa@suse.com>
Subject: Remove dependency on more_itertools which generates a dependency cycle

setuptools buildrequires more_itertools just for one simple function
(unique_everseen) and more_itertools buildrequires setuptools, so
in order to remove the cycle, the unique_everseen function is copied
here so that it can be used without buildrequiring the external package.

Index: setuptools-58.3.0/setuptools/extern/__init__.py
===================================================================
--- setuptools-58.3.0.orig/setuptools/extern/__init__.py
+++ setuptools-58.3.0/setuptools/extern/__init__.py
@@ -69,5 +69,5 @@ class VendorImporter:
             sys.meta_path.append(self)
 
 
-names = 'packaging', 'pyparsing', 'ordered_set', 'more_itertools',
+names = 'packaging', 'pyparsing', 'ordered_set'
 VendorImporter(__name__, names, 'setuptools._vendor').install()
Index: setuptools-58.3.0/setuptools/dist.py
===================================================================
--- setuptools-58.3.0.orig/setuptools/dist.py
+++ setuptools-58.3.0/setuptools/dist.py
@@ -29,7 +29,7 @@ from distutils.version import StrictVers
 
 from setuptools.extern import packaging
 from setuptools.extern import ordered_set
-from setuptools.extern.more_itertools import unique_everseen
+from setuptools.more_itertools import unique_everseen
 
 from . import SetuptoolsDeprecationWarning
 
Index: setuptools-58.3.0/setuptools/more_itertools.py
===================================================================
--- /dev/null
+++ setuptools-58.3.0/setuptools/more_itertools.py
@@ -0,0 +1,19 @@
+def unique_everseen(iterable, key=None):
+    """Yield unique elements, preserving order."""
+
+    seenset = set()
+    seenset_add = seenset.add
+    seenlist = []
+    seenlist_add = seenlist.append
+    use_key = key is not None
+
+    for element in iterable:
+        k = key(element) if use_key else element
+        try:
+            if k not in seenset:
+                seenset_add(k)
+                yield element
+        except TypeError:
+            if k not in seenlist:
+                seenlist_add(k)
+                yield element
Index: setuptools-58.3.0/setuptools/command/build_py.py
===================================================================
--- setuptools-58.3.0.orig/setuptools/command/build_py.py
+++ setuptools-58.3.0/setuptools/command/build_py.py
@@ -8,7 +8,7 @@ import io
 import distutils.errors
 import itertools
 import stat
-from setuptools.extern.more_itertools import unique_everseen
+from setuptools.more_itertools import unique_everseen
 
 
 def make_writable(target):
Index: setuptools-58.3.0/setuptools/msvc.py
===================================================================
--- setuptools-58.3.0.orig/setuptools/msvc.py
+++ setuptools-58.3.0/setuptools/msvc.py
@@ -30,7 +30,7 @@ import itertools
 import subprocess
 import distutils.errors
 from setuptools.extern.packaging.version import LegacyVersion
-from setuptools.extern.more_itertools import unique_everseen
+from setuptools.more_itertools import unique_everseen
 
 from .monkey import get_unpatched
 
Index: setuptools-58.3.0/setuptools/package_index.py
===================================================================
--- setuptools-58.3.0.orig/setuptools/package_index.py
+++ setuptools-58.3.0/setuptools/package_index.py
@@ -27,7 +27,7 @@ from distutils import log
 from distutils.errors import DistutilsError
 from fnmatch import translate
 from setuptools.wheel import Wheel
-from setuptools.extern.more_itertools import unique_everseen
+from setuptools.more_itertools import unique_everseen
 
 
 EGG_FRAGMENT = re.compile(r'^egg=([-A-Za-z0-9_.+!]+)$')
Index: setuptools-58.3.0/setuptools/command/test.py
===================================================================
--- setuptools-58.3.0.orig/setuptools/command/test.py
+++ setuptools-58.3.0/setuptools/command/test.py
@@ -19,7 +19,7 @@ from pkg_resources import (
     EntryPoint,
 )
 from setuptools import Command
-from setuptools.extern.more_itertools import unique_everseen
+from setuptools.more_itertools import unique_everseen
 
 
 class ScanningLoader(TestLoader):