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On 10/28/15 7:16 AM, hasufell wrote: |
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> On 10/28/2015 07:23 AM, Ryan Hill wrote: |
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>> Agreed. If there's one choice then "ssl" should be used. openssl/libressl/etc |
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>> should really be considered sub-flags of ssl. |
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This is what I did with curl. USE=ssl means one and exactly one ssl |
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provider must be specified. I suggested making it a model gentoo wide, |
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but there were criticisms, I forget what, but the made sense to me at |
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teh time. |
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|
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>> |
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>> I really wish we had some way of specifying this to make things clearer to the |
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>> user, so they could see exactly how these flags interact with each other. |
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>> Something like (emerge -pv): |
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>> |
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> The problem here is that we introduced REQUIRED_USE foo for these cases |
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> which is again highly ambigous instead of making the PM aware that this |
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> is an actual sub-USE flag. |
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|
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A properly designed sub-USE flag would be useful here and clearly better |
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than our REQUIRED_USE. I think REQUIRED_USE is fine for heterogeneous |
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cases, but not when you have something like curl where you can either |
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turn ssl on or off. If it is off, nothing more needs to be specified, |
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if it is on, then you must further specify one and exactly one ssl provider. |
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|
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> |
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> This is outside of the scope of this thread, but there are already |
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> distros that have fixed this: |
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> 1. NixOS [0] with truly declarative configuration format, e.g. something |
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> like: |
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> packages.ssl.provider = openssl; |
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> |
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> or somesuch (just an example) |
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> |
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> 2. Exherbo partly [1] with providers syntax: |
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> */* providers: -openssl libressl |
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> |
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> and the exheres would then do something like: |
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> DEPENDENCIES=" |
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> build+run: |
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> providers:openssl? ( dev-libs/openssl:0 ) |
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> providers:libressl? ( dev-libs/libressl ) |
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> " |
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> |
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> which is a lot cleaner than USE_EXPAND + REQUIRED_USE, which still can |
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> have arbitrary meanings. |
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> |
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> But NIH will prevent us from learning here I guess. |
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> |
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> |
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> [0] https://nixos.org/nixos/manual/ |
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> [1] http://exherbo.org/docs/eapi/providers-and-virtuals.html |
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> |
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-- |
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Anthony G. Basile, Ph.D. |
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Gentoo Linux Developer [Hardened] |
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E-Mail : blueness@g.o |
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GnuPG FP : 1FED FAD9 D82C 52A5 3BAB DC79 9384 FA6E F52D 4BBA |
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GnuPG ID : F52D4BBA |
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