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On 07/21/2018 03:01 AM, Dennis Schridde wrote: |
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> |
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> What about adding a third operator, e.g. `^`, that resets a use flag to the |
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> unset state? |
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> |
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The behavior of USE (in profiles) is documented in the PMS, so I don't |
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think we can add a new operator so easily. But, this is what the PMS has |
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to say [0]... |
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Incremental variables must stack between parent and child profiles in |
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the following manner: Beginning with the highest parent profile, |
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tokenise the variable’s value based on whitespace and concatenate the |
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lists. Then, for any token T beginning with a hyphen, remove it and |
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any previous tokens whose value is equal to T with the hyphen removed, |
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or, if T is equal to -*, remove all previous values. |
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It looks to me like *within (sub)profiles*, a USE="-foo" should undo |
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USE=foo, rather than adding "-foo" to the list of tokens that get pushed |
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down via USE_ORDER. |
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[0] https://projects.gentoo.org/pms/7/pms.html#x1-560005.3.1 |
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