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From: Martin Vaeth <martin@mvath.de>
Subject: [gentoo-user] Re: dynamic deps, wtf are they exactly
Date: Wed, 30 Sep 2015 09:41:12 +0000 (UTC)
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References: <56080616.5090406@gmail.com> <560826D7.7070307@gentoo.org>
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James <wireless@tampabay.rr.com> wrote:
>[cr
> DAG's
All this can work only if you reflect the complete history
in the DAG. Such approaches had been discussed and eliminated
as unrealistic: You do not want to keep the history forever;
the data will always grow and eventually be too much.
Moreover, there can be overlays which might be added,
perhaps eventually are abondened, replaced by other
overlays, etc. It is not realistic to expect a complete
history from them since you installed once from them.
One must face the fact that at one stage you have the tree you
installed and at another stage you have the current tree with
possibly dramatic changes and no complete history of all changes.
In the lack of such a history, simply there is information
missing to decide the correct proceeding.
You have to choose your poison which is either to take
the old tree or the new tree as a basis (and to fill the
gaps from the other tree).
> Exactly. The current tools are insufficient
The available information is *in principle* insufficient.