[Distutils] Proposed bdist_dumb fix

[Thomas Heller]

[Sorry for the previous one, still sometimes having problems with gnus]

Andrew Kuchling <akuchlin@mems-exchange.org> writes:

> Here's a proposed patch to alleviate the bdist_dumb problem.  (Patch
> also attached to bug #410541.)
> 

This code doesn't work unchanged on Windows:

> +            else:
> +                # install_base usually is a full path; we need to
> +                # make it a relative path so it can be the second argument
> +                # to os.path.join().
> +                t = install.install_base
> +                if t[0:1] == os.sep:
> +                    t = t[1:]
> +                archive_root = os.path.join(self.bdist_dir, t)

't[0:1] == os.sep' is not a valid test for an absolute pathname,
those contain drive letters on Windows.
This will work, and should also work on other platforms if I understand
the docs for splitdrive() correctly.

            else:
                # install_base usually is a full path; we need to
                # make it a relative path so it can be the second argument
                # to os.path.join().
                t = install.install_base
                # on systems where a drive letter is used, split it off
                _, t = os.path.splitdrive(t)
                if t[0:1] == os.sep:
                    t = t[1:]
                archive_root = os.path.join(self.bdist_dir, t)

I has to use '--from-root 0' command-line flag, is it supposed to work this way,
needing an argument?

The paths in the zip then start with 'Lib/site-packages' and
'Scripts'.  Haven't yet tried older python versions, where
Lib/site-packages was not yet used, see PEP 250.

Thomas