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authorDavid Kalnischkies <kalnischkies@gmail.com>2013-07-10 13:06:05 +0200
committerDavid Kalnischkies <kalnischkies@gmail.com>2013-07-11 18:42:54 +0200
commit486d190d3c66bb7271509dc002f8ec9e9eb0166c (patch)
tree171b341a7caa4c82f47ce007ddb41fccb58f6faa /buildlib/libversion.mak
parent3d1be93dc4242df2b93de632715a8aa7dd34f96f (diff)
prevent MarkInstall of unsynced Multi-Arch:same siblings
Multi-Arch: same packages can be co-installed, but need to have the same version for all installed packages (aka "siblings"). Otherwise the unsynced versions will fight against each other and the auto-install as wel as the problem resolver will later have to decide between holding the packages or to remove one of the siblings (usually a foreign) taking a bunch of packages (like the entire foreign setup) with them. The idea here is now to be more pro-active: MarkInstall will fail for a package if the siblings aren't synced, so we don't allow a situation in which a resolver has to decide if to hold or to remove-upgrade under the assumption that the remove-upgrade decision is always wrong and doesn't deserve to be explored (expect valid out-of-syncs of course). Thats a pretty bold move to take for a library which is used by different solvers so this check is done in IsInstallOk and can be overridden if front-ends want to.
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