Gentoo Archives: gentoo-dev

From: Zac Medico <zmedico@g.o>
To: Gentoo Dev <gentoo-dev@l.g.o>
Cc: gentoo-portage-dev@l.g.o
Subject: [gentoo-dev] [RFC] Label profiles with EAPI for compatibility checks
Date: Sat, 04 Oct 2008 00:10:05
Message-Id: 48E6B447.3030203@gentoo.org
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4 Hi everyone,
5
6 Please consider a new "eapi" profile configuration file that will
7 designate the EAPI to which any package atoms within a given layer
8 of the profile stack must conform. This will allow package managers
9 to bail out with an informative error message if the user
10 accidentally selects a profile containing an EAPI that is not
11 supported by the currently installed package manager.
12
13 In order to allow mixed EAPIs in the profiles, and to avoid having
14 to configure the EAPI in every single layer, each directory of the
15 profile stack should be able to either override or inherit the EAPI
16 value that may have been defined in a previous layer of the profile
17 stack. If no EAPI has been previously defined then it can be assumed
18 to be 0.
19
20 The format of the configuration file can be very simple, containing
21 only the EAPI value and nothing more. For example, a file containing
22 just a single "0" character, followed by a newline, could be
23 created at profiles/base/eapi in order to explicitly declare that
24 atoms in the base profile conform to EAPI 0. However, this
25 particular declaration would be redundant since the base profile
26 does not inherit from any other profile and therefore it's EAPI
27 would be assumed to be 0 anyway.
28
29 Does this seem like a good approach? Are there any suggestions for
30 improvements or alternative approaches?
31 - --
32 Thanks,
33 Zac
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