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Date: Mon, 18 May 2009 11:00:11 -0700
From: Christopher Larson <clarson@mvista.com>
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Subject: Re: [PATCH] bitbake.conf, freeze.inc: Add version lockdown	implementation and use it by default.
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Denys Dmytriyenko wrote:
> On Wed, May 13, 2009 at 05:25:46PM -0400, Denys Dmytriyenko wrote:
>   
>> On Wed, May 13, 2009 at 01:53:18PM -0700, Chris Larson wrote:
>>     
>>> For each recipe which completes a task successfully, this emits the current
>>> version into ${TMPDIR}/versions.conf as a PREFERRED_VERSION line.
>>> ${TMPDIR}/versions.conf and conf/versions.conf are automatically included,
>>> in that order, in subsequent builds, to provide more deterinistic builds by
>>> default, and to let the user make the lockdown persist via a simple cp
>>> command.
>>>
>>> Assuming that the latest ncurses in the recipes is 5.7, and that 5.7 is
>>> preferred over 5.3 by default given any distro version preferences, if they
>>> exist, the following are examples of its behavior:
>>>
>>> $ rm -rf tmp
>>> $ bitbake ncurses-5.3
>>> $ bitbake -c clean ncurses
>>> $ bitbake ncurses # builds ncurses 5.3
>>>
>>> $ cp tmp/versions.conf conf/
>>> $ rm -rf tmp
>>> $ bitbake ncurses # builds ncurses 5.3
>>>       
>> Very nice! Let me try it here...
>>
>>     
>>> Signed-off-by: Chris Larson <clarson@mvista.com>
>>>       
>
> Chris,
>
> Will you be sending an updated version of the patch, which handles TMPDIR 
> overwritten in local.conf, as we discussed last week? Thanks.
Yep, I'm going to make the thing opt-in rather than default, since 
apparently not everyone wants it as default behavior, and change it to 
use ?= assignments, and leave it at that.

-Chris