Re: [gentoo-portage-dev] building dependency tree

[Andrew Gaffney <agaffney@skylineaero.com>]

Jason Stubbs wrote:
> On Saturday 15 May 2004 15:50, Andrew Gaffney wrote:
> 
>>>Jason Stubbs wrote:
>>>
>>>>On Saturday 15 May 2004 13:12, Andrew Gaffney wrote:
>>>>
>>>>>>You've already done a complete rewrite of the dependency resolver?
>>>>
>>>>Yes and no. I started from scratch but used almost exactly the same
>>>>logic. I guess you could almost call it refactoring. Have a look at:
>>>>http://www.gentoo.org/cgi-bin/viewcvs.cgi/portage-mod/portageapi/?root=ge
>>>>ntoo-src
>>>>
>>>>Of interest to you, will probably be dep.py. Even if you do not
>>>>understand python, the logic should be fairly clear (I hope!). The only
>>>>real change from the above logic is that installed packages (including
>>>>their original USE flags and *DEPENDs) are also taken into account.
>>>
>>>I'll have to take a look at it. If anyone wants to take a look at my code
>>>(and maybe give me a few suggestions), the (almost) latest working version
>>>can be accessed at <http://locutus.homeip.net/dev/portage.pl>. It currently
>>>operates the same way 'emerge -ep' would. It doesn't generate the exact
>>>same packages to install as Portage, but it is pretty damn close.
> 
> May I ask what you are writing this for? Once the API I'm working on is 
> completed, tested and integrated (<2 months?) I'll start working on wrappers 
> for other languages. Is that the sort of thing you are after?

I'm not quite sure why I'm doing it. Partly, I wanted to see if I could write a 
program that is faster than Portage. I also like to really understand how things 
work "under the hood". Writing a Perl program that functions like Portage's has 
really helped me do this.

-- 
Andrew Gaffney
Network Administrator
Skyline Aeronautics, LLC.
636-357-1548


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