[Zope-dev] zc.recipe.cmmi shared builds

[Ross Patterson]

Wolfgang Schnerring <ws at gocept.com> writes:

> I'd like to extend zc.recipe.cmmi to support shared build directories.
>
> Use case example: we use lxml in a lot of our projects, which
> currently means having to build libxml and libxslt over and over
> again, since the buildout needs to be standalone and thus can't depend
> on them being installed on the system. But while that's a necessity
> for deployment, it's really annoying for development.
>
> Plan of attack:
> Introduce an option "shared" (defaults to False). If that is set,
> a) calculate HASH as a hash of the recipe's current options (e. g.
> configure parameters, environment variables)
> b) perform the cmmi in ${buildout:download-cache}/cmmi/build/<HASH>,
> if that directory is not present yet. (Probably needs a little thought
> about how to differentiate between "present and has a complete build"
> and "present but we errored out")

This would be great.  I'm always happy when a build recipe provides this
option so I think generalizing it is a good idea.

Ross