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https://git.launchpad.net/~ubuntu-release/britney/+git/britney2-ubuntu
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4030b5cb22
The new Installability Tester (IT) module replaces the remaining C-parts. Unlike C-implementation, it does not give up and emit an "AIEEE" half-way through. In order to determine installability, it uses two sets "musts" and "never". As the names suggest, the sets represents the packages that must be (co-)installable with the package being tested and those that can never be co-installable. For a package to be installable, "musts" and "never" have remain disjoint. These sets are also used to reduce the number of alternatives that are available to satisfy a given dependency. When these sets are unable to remove the choice completely, the new IT defers the choice to later. This occasionally reduces backtracking as a later package may conflict or unconditionally depend on one of the remaining alternatives. Signed-off-by: Niels Thykier <niels@thykier.net>
39 lines
1.1 KiB
Python
39 lines
1.1 KiB
Python
# -*- coding: utf-8 -*-
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# Constants from britney.py
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#
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# Assuming constants are copyrightable, then they are:
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# Copyright (C) 2001-2008 Anthony Towns <ajt@debian.org>
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# Andreas Barth <aba@debian.org>
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# Fabio Tranchitella <kobold@debian.org>
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# Copyright (C) 2010-2012 Adam D. Barratt <adsb@debian.org>
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# source package
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VERSION = 0
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SECTION = 1
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BINARIES = 2
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MAINTAINER = 3
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FAKESRC = 4
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# binary package
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SOURCE = 2
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SOURCEVER = 3
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ARCHITECTURE = 4
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MULTIARCH = 5
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DEPENDS = 6
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CONFLICTS = 7
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PROVIDES = 8
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RDEPENDS = 9
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RCONFLICTS = 10
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ESSENTIAL = 11
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