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On Sun, 24 Oct 2004, Ciaran McCreesh wrote: |
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> On Sun, 24 Oct 2004 18:31:19 +0200 Maurice van der Pot |
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> <griffon26@g.o> wrote: |
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>| Whether a use flag is specifically turned off for a group or it is |
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>| just not present in the group should make no difference for the |
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>| meaning of GROUP. The same holds for -@GROUP. In other words, -use and |
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>| -@GROUP should only be used in the definition of a group to filter |
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>| flags out. |
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>| |
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>| Assume MYGNOME="@GNOME -gtk", then USE="... -@MYGNOME ..." should |
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>| *not* be equivalent to USE="... -@GNOME gtk ...", instead it should |
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>| not influence the state of gtk at all. |
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> |
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> Interesting idea. This then brings us back to one of the original |
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> objections, which was that there should be some way to turn off flags |
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> from within a group. Only way to do that would be to introduce yet |
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> another modifier, which is inconsistent with the rest of portage and |
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> will confuse the heck out of anyone who hasn't studied set theory... |
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How about the following: |
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We add a + operator, to specify settings which are fundamentally part of |
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the group. Negating the group strips all negations, strips all simply |
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present flags, and negates those with a +. |
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So, we then have |
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KDE=+kde +qt X |
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GNOME=+gtk +gtk2 +gnome X |
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USE="@KDE -@GNOME" |
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results in |
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USE="kde qt X -gtk -gtk2 -gnome" |
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This could make some groups be only useful in the positive, for example: |
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MINIMALIST=-kde -qt -X -gtk -gtk2 -gnome -this -that -theotherthing |
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SERVER=@MINIMALIST hardened crypt ncurses pam readline snmp ssl tcpd |
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|
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Ed |
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-- |
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