-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 On 02/09/2016 07:08 PM, Gordon Pettey wrote: > > On Tue, Feb 9, 2016 at 7:19 AM, Kent Fredric > <kentfred...@gmail.com <mailto:kentfred...@gmail.com>> wrote: > > On 10 February 2016 at 02:14, Daniel Campbell <z...@gentoo.org > <mailto:z...@gentoo.org>> wrote: >> Another concern, though, is it'd result in something similar. >> Instead of "cat/foo bar baz" and later removing 'baz', you'd have >> "cat/foo bar ~baz" (with '~baz' as 'enable this if you need to'). >> You'd still have cruft left in your p.use file, and it would >> achieve the same result as a well-commented file. > > > Granted you'd still have the cruft in your config files, but it > would become mostly-harmless cruft, not cruft that caused needless > dependencies to get pulled into the dependency tree as a > side-effect. > > And because it would be "only as needed", you could afford to use > some of those "only if needed" useflags in a more global manner. > > For instance, I really don't want to globally define PYTHON_TARGETS > to include python2_7, because it will simply install a lot of > extra things I know I don't need. > > But if I could globally define something to the effect of > "anything that wants python2.7 support can have it", then that's > acceptable globally, because the effect would still turn things on > automatically on a per-page level, not at a global level. > > So you could achieve the same results with much less syntax and > much less effort. > > > A distinct behavior for +USE (as opposed to -USE and USE) would > fit better than "~USE" IMHO, where the plus means "add if (and only > if) required" and would cascade through dependencies, so if I merge > e.g. app-portage/pfl with USE="+PYTHON_TARGETS_PYTHON2_7" it would > apply that to dependencies as required. ~USE might fit for > something like "~PYTHON_TARGETS_PYTHON3", where it would select the > greatest flag matching that prefix, and would therefore > automatically keep packages that have 3_2, 3_3, 3_4, 3_5 using > whatever is the latest unmasked flag. Could potentially combine the > prefixes, e.g. "~+PYTHON_TARGETS_PYTHON3" to both select the > greatest python version AND cascade to dependencies.
The ~ was just a spitballed idea. It's really not important *what* the symbol is, it's just that one would be required. - -- Daniel Campbell - Gentoo Developer OpenPGP Key: 0x1EA055D6 @ hkp://keys.gnupg.net fpr: AE03 9064 AE00 053C 270C 1DE4 6F7A 9091 1EA0 55D6 -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCAAGBQJWuq6mAAoJEAEkDpRQOeFwiGsQANMRonEdPVxs5wgG2XFB3bMf +jTirnBZX0fH4wwaWy7eN5n1oaivepcup7XjUkiXuoqdyZmvZrb1ttwU/vrjaDZn 82rpP+7s9gNqSphifhGcf/EHTZo49VMZUEOBNElj0YtbEa3bcjG/vCpCgxnPuhVr 7LxuTtT0pDZd1mqMBLi+g5XYmDSfls2T2PWO3formcPYs5B3Xf4Dkc2jWEl7mEsB neDtxkQoXkkuHX3y3uCwXb0KbGKEMenIA+1XiPP9P7nDSaagW+V0DXUWP5aCjTxB csgiOrOdLEO1305eOkk7kxxoZIRoEgvtlSIA5G0R38+23A0Nwo/F0KV3hMjyBcbi S6QuMrvwCgWiUIjgzd0zbI1+81EaHErn5zb6asdj78SaC5nzIbmRdw/zI+s4RIm0 8rw6RBsnDsP4Iah/kJHqMBdtDA7my7ImWKkKuWtAfeJfrYheDMb/NwMfl2L7/hIY jKa0YuZ8P0TnU5xROFlIyXUILXMK/be5KA7RSQe16UMNGLsJLJ/5KBv2KQbJ2fqX DBQG/780jZBNRAVFRimJ4v1S6g/+BJixN6ajZBe2tBjCV70ina7uL5H1K7cenvE5 0U2M0yl/K9QmEOJQoaR2iwTQL4fbRyr1ntbvlHWwE82rMKdQO2FwJxBj2yhEWELh CAlwuL8k7LaFGVoQhQhb =mkla -----END PGP SIGNATURE-----
