diff options
Diffstat (limited to 'apt-pkg/solver3.cc')
| -rw-r--r-- | apt-pkg/solver3.cc | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/apt-pkg/solver3.cc b/apt-pkg/solver3.cc index 620156ac3..abc0af314 100644 --- a/apt-pkg/solver3.cc +++ b/apt-pkg/solver3.cc @@ -1267,3 +1267,23 @@ bool APT::Solver::ToDepCache(pkgDepCache &depcache) const } return true; } + +// Command-line +std::string APT::Solver::InternalCliWhy(pkgDepCache &cache, pkgCache::PkgIterator pkg, bool decision) +{ + APT::Solver solver(cache.GetCache(), cache.GetPolicy(), EDSP::Request::Flags(0)); + // In case nothing has a positive dependency on pkg it may not actually be discovered in a `why-not` + // scenario, so make sure we discover it explicitly. + solver.Discover(Var(pkg)); + if (not solver.FromDepCache(cache) || not solver.Solve()) + return ""; + std::unordered_set<Var> seen; + std::string buf; + if (solver[Var(pkg)].decision == Decision::NONE) + return strprintf(buf, "%s is undecided\n", pkg.FullName().c_str()), buf; + if (decision && solver[Var(pkg)].decision != Decision::MUST) + return strprintf(buf, "%s is not actually marked for install\n", pkg.FullName().c_str()), buf; + if (not decision && solver[Var(pkg)].decision == Decision::MUST) + return strprintf(buf, "%s is actually marked for install\n", pkg.FullName().c_str()), buf; + return solver.LongWhyStr(Var(pkg), decision, solver[Var(pkg)].reason, "", seen); +} |