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On 20/09/12 10:26 AM, Ciaran McCreesh wrote: |
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> On Thu, 20 Sep 2012 10:14:32 -0400 Ian Stakenvicius |
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> <axs@g.o> wrote: |
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>> And, for support to be official for ebuilds or eclasses to query |
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>> IUSE (or other globals) within phase functions, then the 'spec' |
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>> (PMS) is probably all that needs to be 'fixed'. Right? |
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> |
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> First someone would have to check very very carefully that it's |
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> now supported everywhere, including when using binaries, when doing |
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> VDB loading, etc. We'd also have to make sure we're not going to be |
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> hit by bash changing the behaviour of 'source' again... |
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> |
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>> So, in EAPI=6, we propose something that'll make it official (ie |
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>> a querying function; or ensure that PMs can provide these |
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>> variables along with their proper 'effective' values, or their |
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>> in-ebuild 'explicit' values, or whatever it is we want to say can |
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>> be relied upon, to the environment). |
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> |
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> You'll have to be very very specific about where it will and won't |
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> work. It definitely won't work everywhere in global scope, for |
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> example. |
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> |
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> There's also the question of whether we effectively want to force |
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> merging and normalising of variables to be done on the bash side, |
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> rather than inside the package mangler. |
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> |
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*nod* |
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I'm not tied to a particular implementation, rather just that the |
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values of some of these global vars (IUSE, for instance) do seem to |
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have a need to be available for querying during phase functions (and |
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PMS will need to be updated to make this legal, via i assume a future |
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EAPI) |
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That said, since some vars are and must be made available from global |
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scope (ie, "${S}"), I expect that it shouldn't be difficult to enforce |
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effective ${IUSE} no matter what possible things bash might change. |
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