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To: gentoo-pms@g.o
From: Ciaran McCreesh <ciaran.mccreesh@...>
Subject: Re: EAPI specification in ebuilds
Date: Fri, 6 Apr 2012 19:08:49 +0100
On Fri, 6 Apr 2012 09:40:16 +0200
Ulrich Mueller <ulm@g.o> wrote:
> The plan would be to allow optional parsing now, and make it mandatory
> in future, when EAPI 5 is introduced (i.e. EAPI 5 aware package
> managers would have to implement it).

What does this do, if EAPI 5 includes per-package eclasses?

    inherit foo
    EAPI=5

Where 'foo' would be found per-package for EAPI 5, and globally
otherwise. (This is a general problem, and inherit is just an example,
so it needs to be addressed even if you say "well we won't allow that".
The same kind of thing happens if we stick versionator into the package
mangler, or anything else global scopeish.)

What about this, if the package manager does not support the new
behaviour yet?

    EAPI=5
    # 20 lines
    EAPI=4

The proposal as worded doesn't seem to outlaw this, and moving to
"mandatory for EAPI 5" doesn't help either, since under current rules
that ebuild isn't EAPI 5.

What about this?

    cat <<END
    EAPI=5
    END >/dev/null
    EAPI=4

That's also not EAPI 5, so it's not affected by the rules as written.

What about this?

    if [[ $EAPI = 5 ]] ; then
        blah
    fi

    EAPI=5

Also relevant: https://bugs.gentoo.org/show_bug.cgi?id=411069

The solution the Council decided upon doesn't do away with the whole
"pre-source" vs "post-source" EAPI problem.

-- 
Ciaran McCreesh
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EAPI specification in ebuilds
-- Ulrich Mueller
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Updated Jul 18, 2012

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