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On 12/08/15 03:15 PM, Alexis Ballier wrote: |
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> On Wed, 12 Aug 2015 14:24:06 -0400 Ian Stakenvicius |
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> <axs@g.o> wrote: |
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> |
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>> -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 |
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>> |
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>> On 12/08/15 02:19 PM, Alexis Ballier wrote: |
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>>> On Wed, 12 Aug 2015 20:00:42 +0200 Ulrich Mueller |
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>>> <ulm@g.o> wrote: |
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>>> |
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>>>>>>>>> On Wed, 12 Aug 2015, Ciaran McCreesh wrote: |
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>>>> |
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>>>>>> pkg_pretend() { if use qt4; then required_use -qt5 else |
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>>>>>> required_use qt5 fi } |
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>>>> |
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>>>>> And how would the PM understand that -qt5 is conditional |
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>>>>> upon qt4? Such knowledge is required if it's supposed to |
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>>>>> auto-resolve stuff... |
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>>>> |
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>>>> Right, the above was too simple (and wrong). It should |
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>>>> have been: |
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>>>> |
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>>>> pkg_pretend() { use qt4 && use qt5 && required_use -qt5 use |
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>>>> qt4 || use qt5 || required_use qt4 } |
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>>> |
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>>> what is the difference ? |
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>>> |
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>>> pkg_pretend still needs to be executed to guess what |
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>>> useflags are enabled or not, which information is needed |
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>>> before dependency calculation |
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>>> |
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>>> or are we talking about moving pkg_pretend into dependency |
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>>> calculation? |
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>>> |
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>> |
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>> |
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>> pkg_pretend is already executed during dependency calculation |
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>> in portage, although this doesn't seem to actually be specified |
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>> in PMS: "The pkg_pretend function is called some unspecified |
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>> time before a (possibly hypothetical) normal sequence." as per |
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>> PMS sec.9.2 |
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>> |
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> |
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> that's definitely not the impression I've got with emerge -uDNa |
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> world: dep calculation, show result, wait for input, accept, and |
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> then pkg_pretend stuff gets executed. |
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> |
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Apologies if I'm wrong on that; i'm rather sleep deprived and i |
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didn't actually check an emerge -uDN before I posted. I was sure i |
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saw the "checking for sufficient space" messages show up during the |
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dependency-calcs though. |
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Regardless, the role and point of execution of pkg_pretend would |
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definitely need to be clarified in PMS as yes we would be talking |
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about ensuring it happens at a specific point in the dependency |
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calculation process for each package. |
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