Make the setup.py runnable by Python 3 and run 2to3 automatically.

Conflicts:
	sandbox/run_2to3.sh
	setup.py

2to3/run.py

@@ -1,6 +1,32 @@
-#! /usr/bin/python2.7
+#!/usr/bin/env python
+import os
 import sys
+import shutil
+from glob import glob
+try:
     from lib2to3.main import main
+except ImportError:
+    print('Error: you need the 2to3 tool to run this script.')
+os.chdir(os.path.join(os.path.dirname(__file__), '..'))
+try:
+    os.unlink('src/version.py')
+except OSError:
+    pass
+try:
+    shutil.rmtree('py3k')
+except OSError:
+    pass
+os.mkdir('py3k')
+for dirname in ('locales', 'docs', 'plugins'):
+    shutil.copytree(dirname, os.path.join('py3k', dirname))
+
+files = ['run.py', 'src', 'plugins', 'test', 'setup.py'] + glob('scripts/*')
+args = ['-wWno', 'py3k']
+fixers = []
+for fix in ['all', 'def_iteritems', 'def_itervalues', 'def_iterkeys', 'reload']:
+    fixers += ['-f', fix]
+sys.argv = files + args + fixers + sys.argv
+sys.argc = len(sys.argv)
 
 import fix_def_iteritems, fix_def_itervalues, fix_def_iterkeys, fix_reload
 

sandbox/run_2to3.sh

@@ -1,5 +0,0 @@
-rm -f src/version.py # Prevent 2to3 from copying it, since py3k/src/version.py was probably written by root.
-cp locale/ py3k/ -R
-cp docs/ py3k/ -R
-cp plugins/ py3k/ -R # copy plugins data
-python 2to3/run.py src/ plugins/ test/ scripts/* setup.py -wWno py3k -f all -f def_iteritems -f def_itervalues -f def_iterkeys -f reload "$@"

setup.py

@@ -31,27 +31,8 @@
 ###
 
 import sys
-
-if sys.version_info < (2, 6, 0):
-    sys.stderr.write("Supybot requires Python 2.6 or newer.\n")
-    sys.exit(-1)
-
-import textwrap
-
-clean = False
-while '--clean' in sys.argv:
-    clean = True
-    sys.argv.remove('--clean')
-
-import glob
-import shutil
-import os
 import subprocess
 
-
-plugins = [s for s in os.listdir('plugins') if
-           os.path.exists(os.path.join('plugins', s, 'plugin.py'))]
-
 version = None
 try:
     proc = subprocess.Popen('git show HEAD --format=%ci', shell=True,
@@ -60,7 +41,6 @@ try:
             .strip() \
             .replace(' +', '+') \
             .replace(' ', 'T')
-
 except:
     pass
 if not version:
@@ -75,13 +55,40 @@ open(os.path.join('src', 'version.py'), 'a').write(
 
 from src.version import version
 
+if sys.version_info < (2, 6, 0):
+    sys.stderr.write("Supybot requires Python 2.6 or newer.")
+    sys.stderr.write(os.linesep)
+    sys.exit(-1)
+elif sys.version_info[0] >= 3 and \
+        not os.path.split(os.path.abspath(os.path.dirname(__file__)))[-1] == 'py3k':
+    # The second condition is used to prevent this script to run recursively
+    subprocess.Popen([sys.executable, os.path.join('2to3', 'run.py')]).wait()
+    os.chdir('py3k')
+    subprocess.Popen([sys.executable] + sys.argv).wait()
+
+
+import textwrap
+
+clean = False
+while '--clean' in sys.argv:
+    clean = True
+    sys.argv.remove('--clean')
+
+import glob
+import shutil
+import os
+
+
+plugins = [s for s in os.listdir('plugins') if
+           os.path.exists(os.path.join('plugins', s, 'plugin.py'))]
+
 def normalizeWhitespace(s):
     return ' '.join(s.split())
 
 try:
     from distutils.core import setup
     from distutils.sysconfig import get_python_lib
-except ImportError, e:
+except ImportError as e:
     s = normalizeWhitespace("""Supybot requires the distutils package to
     install. This package is normally included with Python, but for some
     unfathomable reason, many distributions to take it out of standard Python
@@ -102,10 +109,10 @@ if clean:
     previousInstall = os.path.join(get_python_lib(), 'supybot')
     if os.path.exists(previousInstall):
         try:
-            print 'Removing current installation.'
+            print('Removing current installation.')
             shutil.rmtree(previousInstall)
-        except Exception, e:
-            print 'Couldn\'t remove former installation: %s' % e
+        except Exception as e:
+            print('Couldn\'t remove former installation: %s' % e)
             sys.exit(-1)
 
 packages = ['supybot',