selftest --parallel=fork fails on win32 because os does not have fork()

[Gordon Tyler]

'bzr selftest --no-plugins --parallel=fork' fails on win32 (Win7 64-bit on Core i7) with the following error:

Traceback (most recent call last):
  File "C:\dev\bzr\bzr.dev\bzrlib\commands.py", line 833, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "C:\dev\bzr\bzr.dev\bzrlib\commands.py", line 1036, in run_bzr
    ret = run(*run_argv)
  File "C:\dev\bzr\bzr.dev\bzrlib\commands.py", line 641, in run_argv_aliases
    return self.run_direct(**all_cmd_args)
  File "C:\dev\bzr\bzr.dev\bzrlib\commands.py", line 645, in run_direct
    return self._operation.run_simple(*args, **kwargs)
  File "C:\dev\bzr\bzr.dev\bzrlib\cleanup.py", line 122, in run_simple
    self.cleanups, self.func, *args, **kwargs)
  File "C:\dev\bzr\bzr.dev\bzrlib\cleanup.py", line 156, in _do_with_cleanups
    result = func(*args, **kwargs)
  File "C:\dev\bzr\bzr.dev\bzrlib\builtins.py", line 3594, in run
    result = selftest(**selftest_kwargs)
  File "C:\dev\bzr\bzr.dev\bzrlib\tests\__init__.py", line 3416, in selftest
    result_decorators=result_decorators,
  File "C:\dev\bzr\bzr.dev\bzrlib\tests\__init__.py", line 2950, in run_suite
    result = runner.run(suite)
  File "C:\dev\bzr\bzr.dev\bzrlib\tests\__init__.py", line 648, in run
    test.run(result)
  File "C:\Python26\lib\site-packages\testtools\testsuite.py", line 49, in run
    tests = self.make_tests(self)
  File "C:\dev\bzr\bzr.dev\bzrlib\tests\__init__.py", line 3194, in fork_for_tests
    pid = os.fork()
AttributeError: 'module' object has no attribute 'fork'

Bazaar (bzr) 2.2.0dev1
  from bzr checkout C:/dev/bzr/bzr.dev
    revision: 5059
    revid: <email address hidden>
    branch nick: bzr.dev
  Python interpreter: C:\Python26\python.exe 2.6.4
  Python standard library: C:\Python26\lib
  Platform: Windows-post2008Server-6.1.7600
  bzrlib: C:\dev\bzr\bzr.dev\bzrlib
  Bazaar configuration: C:\Users\Owner\AppData\Roaming\bazaar\2.0
  Bazaar log file: C:\Users\Owner\Documents\.bzr.log

[Robert Collins (lifeless)]

 status invalid

On win32 you can use --parallel=subprocess

cheers,
Rob

[Matt Nordhoff (mnordhoff)]

Should probably have a nice error message instead of a traceback, though. :-\

[Vincent Ladeuil (vila)]

That's what he does.
An error message will be more dev-friendly than a backtrace though.