python3-nose: translate to python3 code before build

Setuptools has removed support for 2to3 during builds since version
58[1]. But the nose's setup.py relies on use_2to3 option in setuptools,
it is failing an import and building without running 2to3 and generating
valid python3 code. As a workaround, we use command line 2to3 tool to
translate to Python3 code before build it.

Fixes:
$ python3
>>> import nose
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python3.10/site-packages/nose/_init_.py", line 1, in <module>
from nose.core import collector, main, run, run_exit, runmodule
File "/usr/lib/python3.10/site-packages/nose/core.py", line 153
print "%s version %s" % (os.path.basename(sys.argv[0]), _version_)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print(...)?
>>>

[1] pypa/setuptools#2086

(From OE-Core rev: 11214c2de3282acb3a0fd28884d1a9c54c1c284a)

Signed-off-by: Yi Zhao <[email protected]>
Signed-off-by: Richard Purdie <[email protected]>

meta/recipes-devtools/python/python-nose.inc

@@ -6,6 +6,8 @@ SECTION = "devel/python"
 LICENSE = "LGPLv2.1"
 LIC_FILES_CHKSUM = "file://lgpl.txt;md5=a6f89e2100d9b6cdffcea4f398e37343"
 
+SRC_URI += "file://0001-Remove-use_2to3.patch"
+
 SRC_URI[md5sum] = "4d3ad0ff07b61373d2cefc89c5d0b20b"
 SRC_URI[sha256sum] = "f1bffef9cbc82628f6e7d7b40d7e255aefaa1adb6a1b1d26c69a8b79e6208a98"
 
@@ -15,4 +17,8 @@ RDEPENDS:${PN} = "\
   ${PYTHON_PN}-unittest \
   "
 
+do_compile:prepend() {
+    2to3 --write --nobackups --no-diffs ${S}
+}
+
 BBCLASSEXTEND = "native nativesdk"

meta/recipes-devtools/python/python3-nose/0001-Remove-use_2to3.patch

@@ -0,0 +1,71 @@
+From 4307868e31065c56456ddbf03325fc03643cd33f Mon Sep 17 00:00:00 2001
+From: Yi Zhao <[email protected]>
+Date: Fri, 5 Nov 2021 10:12:16 +0800
+Subject: [PATCH] Remove use_2to3
+
+Since version 58, setuptools removed support for 2to3 during builds.
+
+Upstream-Status: Pending
+
+Signed-off-by: Yi Zhao <[email protected]>
+---
+ setup.py     | 3 +--
+ setup3lib.py | 7 +------
+ 2 files changed, 2 insertions(+), 8 deletions(-)
+
+diff --git a/setup.py b/setup.py
+index a2091c0..7e01bba 100644
+--- a/setup.py
++++ b/setup.py
+@@ -13,8 +13,7 @@ if sys.version_info >= (3,):
+         from distribute_setup import use_setuptools
+         use_setuptools()
+
+-    extra = {'use_2to3': True,
+-             'test_dirs': test_dirs,
++    extra = {'test_dirs': test_dirs,
+              'test_build_dir': 'build/tests',
+              'pyversion_patching': True,
+              }
+diff --git a/setup3lib.py b/setup3lib.py
+index 27bdb93..761b74f 100644
+--- a/setup3lib.py
++++ b/setup3lib.py
+@@ -18,7 +18,6 @@ else:
+     import logging
+     from setuptools import Distribution as _Distribution
+     from distutils.core import Command
+-    from setuptools.command.build_py import Mixin2to3
+     from distutils import dir_util, file_util, log
+     import setuptools.command.test
+     from pkg_resources import normalize_path
+@@ -68,7 +67,7 @@ else:
+             self.pyversion_patching = False
+             _Distribution.__init__(self, attrs)
+
+-    class BuildTestsCommand (Command, Mixin2to3):
++    class BuildTestsCommand (Command):
+         # Create mirror copy of tests, convert all .py files using 2to3
+         user_options = []
+
+@@ -83,7 +82,6 @@ else:
+             self.test_base = test_base
+
+         def run(self):
+-            use_2to3 = getattr(self.distribution, 'use_2to3', False)
+             test_dirs = getattr(self.distribution, 'test_dirs', [])
+             test_base = self.test_base
+             bpy_cmd = self.get_finalized_command("build_py")
+@@ -112,9 +110,6 @@ else:
+                             if fn.endswith(ext):
+                                 doc_modified.append(dstfile)
+                                 break
+-            if use_2to3:
+-                self.run_2to3(py_modified)
+-                self.run_2to3(doc_modified, True)
+             if self.distribution.pyversion_patching:
+                 if patch is not None:
+                     for file in modified:
+-- 
+2.17.1
+