+// TryToInstall - Try to install a single package /*{{{*/
+// ---------------------------------------------------------------------
+/* This used to be inlined in DoInstall, but with the advent of regex package
+ name matching it was split out.. */
+bool TryToInstall(pkgCache::PkgIterator Pkg,pkgDepCache &Cache,
+ pkgProblemResolver &Fix,bool Remove,bool BrokenFix,
+ unsigned int &ExpectedInst,bool AllowFail = true)
+{
+ /* This is a pure virtual package and there is a single available
+ provides */
+ if (Cache[Pkg].CandidateVer == 0 && Pkg->ProvidesList != 0 &&
+ Pkg.ProvidesList()->NextProvides == 0)
+ {
+ pkgCache::PkgIterator Tmp = Pkg.ProvidesList().OwnerPkg();
+ c1out << "Note, selecting " << Tmp.Name() << " instead of " << Pkg.Name() << endl;
+ Pkg = Tmp;
+ }
+
+ // Handle the no-upgrade case
+ if (_config->FindB("APT::Get::no-upgrade",false) == true &&
+ Pkg->CurrentVer != 0)
+ {
+ if (AllowFail == true)
+ c1out << "Skipping " << Pkg.Name() << ", it is already installed and no-upgrade is set." << endl;
+ return true;
+ }
+
+ // Check if there is something at all to install
+ pkgDepCache::StateCache &State = Cache[Pkg];
+ if (Remove == true && Pkg->CurrentVer == 0)
+ {
+ if (AllowFail == false)
+ return false;
+ return _error->Error("Package %s is not installed",Pkg.Name());
+ }
+
+ if (State.CandidateVer == 0 && Remove == false)
+ {
+ if (AllowFail == false)
+ return false;
+
+ if (Pkg->ProvidesList != 0)
+ {
+ c1out << "Package " << Pkg.Name() << " is a virtual package provided by:" << endl;
+
+ pkgCache::PrvIterator I = Pkg.ProvidesList();
+ for (; I.end() == false; I++)
+ {
+ pkgCache::PkgIterator Pkg = I.OwnerPkg();
+
+ if (Cache[Pkg].CandidateVerIter(Cache) == I.OwnerVer())
+ {
+ if (Cache[Pkg].Install() == true && Cache[Pkg].NewInstall() == false)
+ c1out << " " << Pkg.Name() << " " << I.OwnerVer().VerStr() <<
+ " [Installed]"<< endl;
+ else
+ c1out << " " << Pkg.Name() << " " << I.OwnerVer().VerStr() << endl;
+ }
+ }
+ c1out << "You should explicitly select one to install." << endl;
+ }
+ else
+ {
+ c1out << "Package " << Pkg.Name() << " has no available version, but exists in the database." << endl;
+ c1out << "This typically means that the package was mentioned in a dependency and " << endl;
+ c1out << "never uploaded, has been obsoleted or is not available with the contents " << endl;
+ c1out << "of sources.list" << endl;
+
+ string List;
+ pkgCache::DepIterator Dep = Pkg.RevDependsList();
+ for (; Dep.end() == false; Dep++)
+ {
+ if (Dep->Type != pkgCache::Dep::Replaces)
+ continue;
+ List += string(Dep.ParentPkg().Name()) + " ";
+ }
+ ShowList(c1out,"However the following packages replace it:",List);
+ }
+
+ _error->Error("Package %s has no installation candidate",Pkg.Name());
+ return false;
+ }
+
+ Fix.Clear(Pkg);
+ Fix.Protect(Pkg);
+ if (Remove == true)
+ {
+ Fix.Remove(Pkg);
+ Cache.MarkDelete(Pkg,_config->FindB("APT::Get::Purge",false));
+ return true;
+ }
+
+ // Install it
+ Cache.MarkInstall(Pkg,false);
+ if (State.Install() == false)
+ {
+ if (_config->FindB("APT::Get::ReInstall",false) == true)
+ {
+ if (Pkg->CurrentVer == 0 || Pkg.CurrentVer().Downloadable() == false)
+ c1out << "Sorry, re-installation of " << Pkg.Name() << " is not possible, it cannot be downloaded" << endl;
+ else
+ Cache.SetReInstall(Pkg,true);
+ }
+ else
+ {
+ if (AllowFail == true)
+ c1out << "Sorry, " << Pkg.Name() << " is already the newest version" << endl;
+ }
+ }
+ else
+ ExpectedInst++;
+
+ // Install it with autoinstalling enabled.
+ if (State.InstBroken() == true && BrokenFix == false)
+ Cache.MarkInstall(Pkg,true);
+ return true;
+}
+ /*}}}*/
projects / apt.git / blobdiff