The queue schedules tasks for the solver
The tasks are (cmd, id) pairs.
A command consists of a job and a selection, both parts ORed together. The following jobs are defined:
- SOLVER_INSTALL Install selection
- SOLVER_ERASE Erase selection
- SOLVER_UPDATE Update selection
- SOLVER_WEAKENDEPS Ignore as many dependencies of the selected solvable as needed to obtain a solution
- SOLVER_NOOBSOLETES ignore obsoles of the selection (multiversion install)
- SOLVER_LOCK lock selection, i.e. keep state
There is also the SOLVER_WEAK flag, which tells the solver that it can ignore the request to create a solution.
The following selection exist:
- SOLVER_SOLVABLE id is a solvable id
- SOLVER_SOLVABLE_NAME id is a solvable name (or a dependency), packages must match with their name/epoch/version/release
- SOLVER_SOLVABLE_PROVIDES id is a dependency, packages must match with one of their provides
- SOLVER_SOLVABLE_ONE_OF id is an offset into the whatprovides index, it points to a set of solvable ids terminated by id 0.
