[RFC] depend on testtools for testing?

John Arbash Meinel john at arbash-meinel.com
Fri Oct 30 01:45:56 GMT 2009


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Robert Collins wrote:
> On Thu, 2009-10-29 at 17:08 -0400, Francis J. Lacoste wrote:
> 
> 
>> buildout is a great tool to manage such dependencies automatically. Both 
>> Launchpad and Lanscape are now using it. It's great for development, but it 
>> won't solve the additional complexity in packaging. (bzr requires testtools < 
>> 0.5, but the system .deb has 0.6 and you can't install both in parallel.)
> 
> I've been mulling on this sort of thing for a while; I'm coming to the
> conclusion that buildout - like config-manager, which is its moral
> equivalent but using VCS rather than eggs - is an adaptation that should
> be avoided. Its better to build a deb of the needed dependency and
> install it.
> 
> Then when you have conflicting library requirements there are a number
> of ways to address it:
>  - use a chroot
>  - fix the project to use a newer library version
>  - fix the packaging to support older libraries being coinstalled (which
> eggs can support I believe, but the python packaging rules on Ubuntu
> don't [yet]). The C library rules *do* support multiple sonames being
> installed, so there is prior art on what the packaging system needs to
> see.
> 
> Using packages is desirable because it leverages the [significant]
> investment made in producting things on Ubuntu rather than creating a
> new environment with its own [significant - I've been watching :)]
> quirks.
> 
> Sadly MacOSX, Sand Windows don't have quite so polished packaging
> systems - but we're quite a ways up the learning curve for making
> installers for MacOSX and Windows :)
> 
> -Rob

Make bdist_msi works reasonably well for a pure-python package. And is
available in standard 'disutils' for newer versions of python. (May be
2.5+, I don't know what 'newer' really means.)

John
=:->
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