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On Monday 18 October 2004 08:05, Ciaran McCreesh wrote: |
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> On Sun, 17 Oct 2004 23:39:46 +0200 Francesco Riosa |
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> |
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> <francesco@×××××××××.it> wrote: |
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> | The GLEP specify that: |
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> | Groups should *not* generally contain negative USE flags, as this |
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> | would lead to confusion. |
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> | |
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> | my two cents are to *allow* negative USE flags and parse them |
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> | *before* the additive ones. |
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> |
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> I'm against this, on the grounds that it's totally different from the |
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> way everything else is handled USE-wise. |
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|
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I'm against the two cents (if necessary, I'll go into the 101 pitfalls) but |
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I'm not against the negatives in groups. In fact, I think for USE flags they |
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are actually required. For example, |
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|
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@GAMING="music maps sounds cdinstall -nojoystick" |
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|
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Then on negation, deal with it mathematically. For example, |
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|
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-@GAMING == -music -maps -sounds -cdinstall nojoystick |
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|
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From an implementation perspective, this seems clean and simple. From a |
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maintainer's perspective, all reasonable functionality seems to be available. |
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From a user's perspective, the result seems to intuitively match the intent. |
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Having said that, I can't see negated USE flags every being useful within a |
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group unless the USE flags themselves are negative. |
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|
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As for general processing, I'd think that what would be most intuitive given |
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the current scheme of things is that things are expanded in place. Hence, |
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|
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Given, |
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@KDE="kde qt arts X" |
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@GNOME="gnome gtk esd X" |
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then, |
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USE="-@KDE @GNOME" |
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becomes |
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USE="-kde -qt -arts -X gnome gtk esd X" |
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becomes |
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USE="gnome gtk esd X" |
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|
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Similarly, |
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USE="@KDE -@GNOME" |
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becomes |
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USE="kde qt arts X -gnome -gtk -esd -X" |
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becomes |
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USE="kde qt arts" |
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|
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Sure the second case may seem strange to the new user at first, but I'm sure |
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that documentation and support will handle it just as it does the users that |
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try to USE="-xfree". |
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|
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BTW, may as well keep the grouping discussion here. In fact, it might be best |
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to remove grouping from the ACCEPT_LICENSE GLEP so as to get the rest of it |
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finalized. See how time goes, I guess... |
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|
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Regards, |
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Jason Stubbs |
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|
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-- |
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