[Distutils] Problem with setuptools >=0.5a9 and develop command

[Michael Twomey]

Hi,

I've been busily converting some of my smaller servers to eggs, and
I've hit a problem with the develop command. From setuptools 0.5a9
onwards the develop command barfs with the following traceback:

$ python2.4 setup.py develop --help
Traceback (most recent call last):
  File "setup.py", line 33, in ?
    install_requires = [
  File "/usr/lib/python2.4/site-packages/setuptools-0.5a10-py2.4.egg/setuptools/__init__.py",
line 51, in setup
  File "/usr/lib/python2.4/distutils/core.py", line 135, in setup
    ok = dist.parse_command_line()
  File "/usr/lib/python2.4/site-packages/setuptools-0.5a10-py2.4.egg/setuptools/dist.py",
line 107, in parse_command_line
  File "/usr/lib/python2.4/distutils/dist.py", line 432, in parse_command_line
    args = self._parse_command_opts(parser, args)
  File "/usr/lib/python2.4/site-packages/setuptools-0.5a10-py2.4.egg/setuptools/dist.py",
line 385, in _parse_command_opts
  File "/usr/lib/python2.4/distutils/dist.py", line 530, in _parse_command_opts
    parser.set_negative_aliases(negative_opt)
  File "/usr/lib/python2.4/distutils/fancy_getopt.py", line 143, in
set_negative_aliases
    self._check_alias_dict(negative_alias, "negative alias")
  File "/usr/lib/python2.4/distutils/fancy_getopt.py", line 125, in
_check_alias_dict
    raise DistutilsGetoptError, \
distutils.errors.DistutilsGetoptError: invalid negative alias
'always-unzip': option 'always-unzip' not defined

Looking at commands/develop.py I notice that it's the only command
which sets 'command_consumes_arguments = False', and it also doesn't
override the negative_opt dict. I tried setting 'negative_opt = {}'
and it started working again.

So this patch "fixes" the issue though I don't know the internals of
distutils/setuptools to tell you exactly why:

--- /tmp/setuptools-0.5a10/setuptools/command/develop.py       
2005-07-06 19:15:52.000000000 +0100
+++ setuptools/command/develop.py       2005-07-12 11:50:04.000000000 +0100
@@ -21,6 +21,8 @@
     boolean_options = [
         'multi-version', 'exclude-scripts', 'always-copy', 'uninstall'
     ]
+    
+    negative_opt = {}
 
     command_consumes_arguments = False  # override base
 

Is anyone else seeing this problem? I've reproduced it on a debian
linux box and my apple laptop.

cheers,
  Michael