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Roy Bamford wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> On 2009.03.09 22:47, Thomas Anderson wrote:
>> Hi,
>>
>> Attached is my comparison of the two proposals for live sources.
>> Sorry about getting it out late, I had to get ahold of a number
>> of
>> people to finish writing it up.
>>
>> Cheers,
>> Thomas
>> --
>> ---------
>> Thomas Anderson
>> Gentoo Developer
>> /////////
>> Areas of responsibility:
>> AMD64, Secretary to the Gentoo Council
>> ---------
>>
>>
>
> - ------quoted attachment "glep54comp.txt"------
> [snip]
>> One important issue is what happens in the following
>> scenario:
>> 1) world update starts at 20090301@2200hrs.
>> 2) this particular update involves 100 packages so it takes
>> quite
>> along time
>> 3) The _live package is not reached until 20090302 at 1AM.
>>
>> Is the package installed as 20090301 or 20090302?
>>
> [snip]
>
> Thomas,
>
> Live has to expand to the date when the sources were fetched, otherwise
> its not 'live' by definition.
> As an illustration, I install KDE 4.2 on my 25MHz 486DX with 64Mb RAM.
> During the time it takes to build, 'live' is likely to have changed
> several times.
It isn't exactly a problem (more will follow)
>
> How do you handle prefetching of sources, or do you forbid
> prefetching ?
live template ebuild require supporting src_fetch among the other stuff.
Keep in mind that once you get an ebuild from the template you can
use&reuse it as a normal ebuild (so it works like the mythtv "not so
live" ebuilds using svn on fixed revision)
> Live infers you fetch the sources at the time you need to build them
> and do the live expansion at that time. Without that you don't know how
> old your live version is.
>
> live can change several times a day. With only one day resolution, how
> do you handle that?
What is in the draft you can find on
http://dev.gentoo.org/~lu_zero/glep/liveebuild.rst
"
Resolution and Version Comparison
---------------------------------
At resolution the live keyword is substituted with a timestamp in the
form of
iso date (``YYYYMMDDhhmm``) and the version comparison follows the normal
version comparison rules.
"
Once you trigger the template -> ebuild generation you are working with
a snapshot for all what concerns portage.
So once you start you are set.
lu
--
Luca Barbato
Gentoo Council Member
Gentoo/linux Gentoo/PPC
http://dev.gentoo.org/~lu_zero
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