void
BPackageManager::Uninstall(const BSolverPackageSpecifierList& packages)
{
Init(B_ADD_INSTALLED_REPOSITORIES);
// find the packages that match the specification
const BSolverPackageSpecifier* unmatchedSpecifier;
PackageList foundPackages;
status_t error = fSolver->FindPackages(packages,
BSolver::B_FIND_INSTALLED_ONLY, foundPackages, &unmatchedSpecifier);
if (error != B_OK) {
if (unmatchedSpecifier != NULL) {
DIE(error, "failed to find a match for \"%s\"",
unmatchedSpecifier->SelectString().String());
} else
DIE(error, "failed to compute packages to uninstall");
}
// determine the inverse base package closure for the found packages
// TODO: Optimize!
InstalledRepository& installationRepository = InstallationRepository();
bool foundAnotherPackage;
do {
foundAnotherPackage = false;
int32 count = installationRepository.CountPackages();
for (int32 i = 0; i < count; i++) {
BSolverPackage* package = installationRepository.PackageAt(i);
if (foundPackages.HasItem(package))
continue;
if (_FindBasePackage(foundPackages, package->Info()) >= 0) {
foundPackages.AddItem(package);
foundAnotherPackage = true;
}
}
} while (foundAnotherPackage);
// remove the packages from the repository
for (int32 i = 0; BSolverPackage* package = foundPackages.ItemAt(i); i++)
installationRepository.DisablePackage(package);
for (;;) {
error = fSolver->VerifyInstallation(BSolver::B_VERIFY_ALLOW_UNINSTALL);
if (error != B_OK)
DIE(error, "failed to compute packages to uninstall");
_HandleProblems();
// (virtually) apply the result to this repository
_AnalyzeResult();
for (int32 i = foundPackages.CountItems() - 1; i >= 0; i--) {
if (!installationRepository.PackagesToDeactivate()
.AddItem(foundPackages.ItemAt(i))) {
throw std::bad_alloc();
}
}
installationRepository.ApplyChanges();
// verify the next specific respository
if (!_NextSpecificInstallationLocation())
break;
foundPackages.MakeEmpty();
// NOTE: In theory, after verifying a more specific location, it would
// be more correct to compute the inverse base package closure for the
// packages we need to uninstall and (if anything changed) verify again.
// In practice, however, base packages are always required with an exact
// version (ATM). If that base package still exist in a more general
// location (the only reason why the package requiring the base package
// wouldn't be marked to be uninstalled as well) there shouldn't have
// been any reason to remove it from the more specific location in the
// first place.
}
_ConfirmChanges(true);
_ApplyPackageChanges(true);
}
