One more thing about this. On 10/05/16 15:09, David Kalnischkies wrote: > The preferences string is missing as it isn't sent – and it isn't sent > because it > doesn't apply to the specified solver: You requested 'dump' to resolve it, but > the preferences string is for 'aspcud'.
this works as expected : APT_EDSP_DUMP_FILENAME=/tmp/dump.edsp apt-get -s --solver dump -o 'APT::Solver::Strict-Pinning=false' -o 'APT::Solver::dump::Preferences=-removed,-changed,-new,-count(solution,APT-Release:=/experimental/)' build-dep qgis where now the name of the solver and the preferences matches. However if we read the spec carefully, the Preferences field is associated to APT::Solver::Preferences - **Preferences:** a solver-specific optimization string, usually coming from the `APT::Solver::Preferences` configuration option. Using this command line : APT_EDSP_DUMP_FILENAME=/tmp/dump.edsp apt-get -s --solver dump -o 'APT::Solver::Strict-Pinning=false' -o 'APT::Solver::Preferences=-removed,-changed,-new,-count(solution,APT-Release:=/experimental/)' build-dep qgis nothing is passed in the edsp... I interpret this as APT::Solver::Preferences is a general configuration parameter passed to the edsp doesn't matter the solver used and APT::Solver::$solver::Preferences will be used only for a specific solver.
