On Sun, 13 Sep 2009 22:17:19 +0200 Sebastian Pipping <webmas...@hartwork.org> wrote: > Ciaran McCreesh wrote: > > Not quite. If both an overlay and the main tree provide foo-1.2, > > masking foo-1.2::overlay in Portage would end up masking every > > foo-1.2. > > Why?
Because an overlay model has only a single foo-1.2. Think of it like stacks of paper. You've got your main repository: ::gentoo foo-1.1 foo-1.2 foo-1.3 and on top of that you put your overlay: ::extras foo-1.2 foo-1.4 ::gentoo foo-1.1 foo-1.2 foo-1.3 and then looking down from the top, all an overlay model package manager sees is the foo-1.2 from the overlay. There's no foo-1.2::gentoo and foo-1.2::extras, there's just a single foo-1.2 that's made from (gentoo + extras). There's a different way of looking at it that focuses more on the repository level view at [1]. [1]: http://ciaranm.wordpress.com/2009/04/16/distributed-distribution-development-and-why-git-and-or-funtoo-is-not-it/ -- Ciaran McCreesh
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