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On Thu, 22 Jan 2015 02:50:44 -0800 |
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Zac Medico <zmedico@g.o> wrote: |
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> On 01/21/2015 11:25 PM, Alexis Ballier wrote: |
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> > 1. If portage uses crafted depstrings in its depgraph when |
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> > rebuilding a package and nobody is able to give me a good reason |
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> > _why_ this is needed, I really do not want to look at the code :) |
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> |
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> It's the emerge --dynamic-deps option, which is enabled by default. If |
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> you want to use --dynamic-deps=n, then you may need to fix some |
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> dependencies of installed packages, which you can do by running emerge |
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> @changed-deps. There's also a --changed-deps [1] option that can be |
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> applied to @world updates, which will be included in Portage 2.2.16. |
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> |
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> [1] |
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> https://github.com/gentoo/portage/commit/e99fa094ac73514b23509a0f8305b365f114e9a3 |
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This answers 'how' and, as I understand it, changed-deps is also about |
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'how' to trigger rebuild. |
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My question was: _why_ when portage knows what package to rebuild |
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doesn't it use the dep string from the ebuild ? |
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That's what I understand from Michał's comment (quoting him): |
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> 1. if you have dynamic-deps enabled, portage will want to install both |
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> ffmpeg (because of :=) and libav (because of ||). The effective |
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> deps will look like: |
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> |
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> || ( ffmpeg:0/51= libav ) ffmpeg:0/51= |
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As I understand it, portage (correctly) marks this package for rebuild |
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(because ffmpeg:0/51= dep isn't satisfied anymore), but I don't get why |
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it doesn't consider the original '|| ( ffmpeg:= libav:= )' dep for the |
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depgraph and wants to pull ffmpeg in "because of :=". |
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Alexis. |
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