[oe] Bitbaking while modifying recipes

[Chris Larson]

On Thu, Oct 14, 2010 at 11:40 PM, Frans Meulenbroeks <
fransmeulenbroeks at gmail.com> wrote:

> 2010/10/14 Chris Larson <clarson at kergoth.com>:
> > On Thu, Oct 14, 2010 at 1:14 PM, Ash Charles <ashcharles at gmail.com>
> wrote:
> >
> >> Hi,
> >>
> >> At what point in bitbaking a recipe is it safe to start modifying the
> >> recipe without risk of messing up the current bitbake build?  I often
> >> find myself kicking off a bitbake and then wanting to do some git
> >> operations in my openembedded recipes tree.  Previously I've resisted
> >> the urge to mess around until whatever is being bitbaked is done but I
> >> suspect that I'd be fine to make changes as soon as the parse step is
> >> completed.  Is this correct?
> >
> >
> > Unfortunately not.  As things stand today, the upfront parsing phase is
> only
> > used to populate the cache / obtain the info necessary to construct the
> > runqueue.  The recipes are actually *reparsed* when each task is
> executed.
> >  The time taken by the parse is rather trivial, so its not much of an
> issue,
> > but I do have a patch in queue from a coworker to make it cache the
> parsed
> > recipe until the last task for that recipe is run.
> >
> > So, basically, continue to resist the urge :)
> >
> As far as I see it (and this seems not to contradict with what Chris
> wrote) it is ok to work on a recipe after the parsing has finished if
> it is a recipe that is not being build (either directly or indirectly
> through depends).
> E.g. if you are building busybox I feel you could still work on a qt
> recipe while the busybox build is in progress ((or even on another
> version of the busybox recipe (e.g. one with DEFAULT_PREFERENCE =
> "-1"))
>
> Chris, can you confirm?


Yeah, that's correct.  After the initial parse, the only recipes which get
parsed again are those involved in the build.
-- 
Christopher Larson
clarson at kergoth dot com
Founder - BitBake, OpenEmbedded, OpenZaurus
Maintainer - Tslib
Senior Software Engineer, Mentor Graphics