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authorDavid Kalnischkies <david@kalnischkies.de>2016-07-28 11:43:36 +0200
committerDavid Kalnischkies <david@kalnischkies.de>2016-08-10 23:51:34 +0200
commit4326680d2ed23d597f45ca8872a7054368560acc (patch)
treed355be7dc120d07771a774da88241f10150cc673 /apt-pkg/cacheset.cc
parent83e5cffc2015aa809acac84737756d292d7bf106 (diff)
simulate all package manager actions explicitly
If a planner lets actions to be figured out by dpkg in pending calls these actions aren't mentioned in a simulation. While that might be a good thing for debugging, it would be a change in behavior and especially if a planner avoids explicit removals could be confusing for users. As such we perform the same 'trick' as in the dpkg implementation by performing explicitly what would be done by the pending calls. To save us some work and avoid desyncs we perform a layer violation by using deb/ code in the generic simulation – and further we perform ugly dynamic_cast to avoid breaking the ABI for nothing; aptitude is the only other user of the simulation class according to codesearch.d.n and for that our little trick works. It just isn't working if you happen to extend pkgSimulate or otherwise manage to call the protected Go methods directly – which isn't very realistic/practical.
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