Comment 6 for bug 1208028

I ended up rewriting all this exception treatment in the stable branch.
Actually this notion of soft dependencies is not that useful currently (has been made for openerp-command), but it could well turn really useful again on short notice.

The exceptions raised by zc.buildout in case of problem with eggs installations (requirements) can vary, and they also depend on the version of zc.buildout itself. Interesting ranges are ( < 1.7, 1.7, >= 2.0). Could you please give it a try ?
I wrote as much unit-testing as I could.

Thanks !