X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/3826564e07eaffb05eca5af34a0e76f6f161b89c..fc5aece9d8600b68cf8d654b379b6d840f2a5524:/apt-pkg/algorithms.cc

diff --git a/apt-pkg/algorithms.cc b/apt-pkg/algorithms.cc
index 479927d65..8626d33dc 100644
--- a/apt-pkg/algorithms.cc
+++ b/apt-pkg/algorithms.cc
@@ -20,10 +20,14 @@
 #include <apt-pkg/algorithms.h>
 #include <apt-pkg/error.h>
 #include <apt-pkg/configuration.h>
+#include <apt-pkg/pkgsystem.h>
+#include <apt-pkg/version.h>
 #include <apt-pkg/sptr.h>
+
     
 #include <apti18n.h>
-    
+#include <sys/types.h>
+#include <regex.h>
 #include <iostream>
 									/*}}}*/
 using namespace std;
@@ -1061,6 +1065,20 @@ bool pkgProblemResolver::Resolve(bool BrokenFix)
       return _error->Error(_("Unable to correct problems, you have held broken packages."));
    }
    
+   // set the auto-flags (mvo: I'm not sure if we _really_ need this, but
+   // I didn't managed 
+   pkgCache::PkgIterator I = Cache.PkgBegin();
+   for (;I.end() != true; I++) {
+      if (Cache[I].NewInstall() && !(Flags[I->ID] & PreInstalled)) {
+	 if(_config->FindI("Debug::pkgAutoRemove",false)) {
+	    std::clog << "Resolve installed new pkg: " << I.Name() 
+		      << " (now marking it as auto)" << std::endl;
+	 }
+	 Cache[I].Flags |= pkgCache::Flag::Auto;
+      }
+   }
+
+
    return true;
 }
 									/*}}}*/
@@ -1232,3 +1250,238 @@ void pkgPrioSortList(pkgCache &Cache,pkgCache::Version **List)
    qsort(List,Count,sizeof(*List),PrioComp);
 }
 									/*}}}*/
+
+
+// mark a single package in Mark-and-Sweep
+void pkgMarkPackage(pkgDepCache &Cache,
+		    const pkgCache::PkgIterator &pkg,
+		    const pkgCache::VerIterator &ver,
+		    bool follow_recommends,
+		    bool follow_suggests)
+{
+   pkgDepCache::StateCache &state=Cache[pkg];
+   pkgCache::VerIterator candver=state.CandidateVerIter(Cache);
+   pkgCache::VerIterator instver=state.InstVerIter(Cache);
+
+#if 0
+   // If a package was garbage-collected but is now being marked, we
+   // should re-select it 
+   // For cases when a pkg is set to upgrade and this trigger the
+   // removal of a no-longer used dependency.  if the pkg is set to
+   // keep again later it will result in broken deps
+   if(state.Delete() && state.RemoveReason=pkgDepCache::Unused) 
+   {
+      if(ver==candver)
+	 mark_install(pkg, false, false, NULL);
+      else if(ver==pkg.CurrentVer())
+	 MarkKeep(pkg);
+      
+      instver=state.InstVerIter(*this);
+   }
+#endif
+
+   // Ignore versions other than the InstVer, and ignore packages
+   // that are already going to be removed or just left uninstalled.
+   if(!(ver==instver && !instver.end()))
+      return;
+
+   // if we are marked already we are done
+   if(state.Marked)
+      return;
+
+   //std::cout << "Setting Marked for: " << pkg.Name() << std::endl;
+   state.Marked=true;
+
+   if(!ver.end())
+   {
+     for(pkgCache::DepIterator d=ver.DependsList(); !d.end(); ++d)
+     {
+	if(d->Type==pkgCache::Dep::Depends ||
+	   d->Type==pkgCache::Dep::PreDepends ||
+	   (follow_recommends &&
+	    d->Type==pkgCache::Dep::Recommends) ||
+	   (follow_suggests &&
+	    d->Type==pkgCache::Dep::Suggests))
+        {
+	   // Try all versions of this package.
+	   for(pkgCache::VerIterator V=d.TargetPkg().VersionList(); 
+	       !V.end(); ++V)
+	   {
+	      if(_system->VS->CheckDep(V.VerStr(),d->CompareOp, d.TargetVer()))
+	      {
+		 pkgMarkPackage(Cache, V.ParentPkg(), V, 
+				follow_recommends, follow_suggests);
+	      }
+	   }
+	   // Now try virtual packages
+	   for(pkgCache::PrvIterator prv=d.TargetPkg().ProvidesList(); 
+	       !prv.end(); ++prv)
+	   {
+	      if(_system->VS->CheckDep(prv.ProvideVersion(), d->CompareOp, 
+				       d.TargetVer()))
+	      {
+		 pkgMarkPackage(Cache, prv.OwnerPkg(), prv.OwnerVer(),
+				follow_recommends, follow_suggests);
+	      }
+	   }
+	}
+     }
+   }
+}
+
+
+// Helper for APT::NeverAutoRemove, always include the packages matching
+// this regexp into the root-set
+inline bool 
+pkgMarkAlwaysInclude(pkgCache::PkgIterator p, vector<regex_t*> alwaysMark)
+{
+   for(unsigned int i=0;i<alwaysMark.size();i++)
+      if (regexec(alwaysMark[i],p.Name(),0,0,0) == 0)
+	 return true;
+
+   return false;
+}
+
+// the main mark algorithm
+bool pkgMarkUsed(pkgDepCache &Cache, InRootSetFunc func)
+{
+   bool follow_recommends;
+   bool follow_suggests;
+
+   // init the states
+   for(pkgCache::PkgIterator p=Cache.PkgBegin(); !p.end(); ++p)
+   {
+      Cache[p].Marked=false;
+      Cache[p].Garbage=false;
+   }
+
+   // init vars
+   follow_recommends=_config->FindB("APT::AutoRemove::RecommendsImportant",false);
+   follow_suggests=_config->FindB("APT::AutoRemove::SuggestsImportant", false);
+
+
+   // init the "NeverAutoRemove" variable
+   vector<regex_t *> neverAutoRemoveRegexp;
+   Configuration::Item const *Opts;
+   Opts = _config->Tree("APT::NeverAutoRemove");
+   if (Opts != 0 && Opts->Child != 0)
+   {
+      Opts = Opts->Child;
+      for (; Opts != 0; Opts = Opts->Next)
+      {
+	 if (Opts->Value.empty() == true)
+	    continue;
+
+	 regex_t *p = new regex_t;
+	 if(regcomp(p,Opts->Value.c_str(),
+		    REG_EXTENDED | REG_ICASE |  REG_NOSUB) != 0)
+	 {
+	    regfree(p);
+	    for(unsigned int i=0;i<neverAutoRemoveRegexp.size();i++)
+	       regfree(neverAutoRemoveRegexp[i]);
+	    return _error->Error("Regex compilation error for APT::NeverAutoRemove");
+	 }
+	 neverAutoRemoveRegexp.push_back(p);
+      }
+   }
+
+
+   // do the mark part, this is the core bit of the algorithm
+   for(pkgCache::PkgIterator p=Cache.PkgBegin(); !p.end(); ++p)
+   {
+      if( (func != NULL ? (*func)(p) : false) ||
+	   pkgMarkAlwaysInclude(p, neverAutoRemoveRegexp) ||
+	 !(Cache[p].Flags & pkgCache::Flag::Auto) ||
+	  (p->Flags & pkgCache::Flag::Essential))
+          
+      {
+	 // the package is installed (and set to keep)
+	 if(Cache[p].Keep() && !p.CurrentVer().end())
+	    pkgMarkPackage(Cache, p, p.CurrentVer(),
+			   follow_recommends, follow_suggests);
+	 // the package is to be installed 
+	 else if(Cache[p].Install())
+	    pkgMarkPackage(Cache, p, Cache[p].InstVerIter(Cache),
+			   follow_recommends, follow_suggests);
+      }
+   }
+
+
+   // do the sweep
+   for(pkgCache::PkgIterator p=Cache.PkgBegin(); !p.end(); ++p)
+  {
+     pkgDepCache::StateCache &state=Cache[p];
+
+     if(!state.Marked)
+     {
+	// mark installed but not yet marked stuff as garbage
+	if(p->CurrentVer != 0) {
+	   state.Garbage=true;
+	   std::cout << "Garbage: " << p.Name() << std::endl;
+	}
+
+#if 0   // mvo: the below bits still needs to be ported
+
+	// Be sure not to re-delete already deleted packages.
+	if(delete_unused && (!p.CurrentVer().end() || state.Install()) &&
+	   !state.Delete())
+	{
+	      bool do_delete=true;
+
+	      // If the package is being upgraded, check if we're
+	      // losing a versioned dep.  If the dependency matches
+	      // the previous version and not the new version, keep
+	      // the package back instead of removing it.
+	      if(!p.CurrentVer().end() && state.Install())
+		{
+		  const char *vs=p.CurrentVer().VerStr();
+
+		  // Check direct revdeps only.  THIS ASSUMES NO
+		  // VERSIONED PROVIDES, but Debian probably won't
+		  // have them for ages if ever.
+		  for(pkgCache::DepIterator revdep=p.RevDependsList();
+		      !revdep.end(); ++revdep)
+		    {
+		      pkgCache::PkgIterator depender=revdep.ParentPkg();
+		      // Find which version of the depending package
+		      // will be installed.
+		      pkgCache::VerIterator instver=(*this)[depender].InstVerIter(*this);
+
+		      // Only pay attention to strong positive
+		      // dependencies whose parents will be installed.
+		      if(revdep.ParentVer()==instver &&
+			 (revdep->Type==pkgCache::Dep::Depends ||
+			  revdep->Type==pkgCache::Dep::PreDepends ||
+			  (revdep->Type==pkgCache::Dep::Recommends &&
+			   follow_recommends)))
+			{
+			  // If the previous version matched, cancel the
+			  // deletion.  (note that I assume that the new
+			  // version does NOT match; otherwise it would
+			  // not be unused!)
+			  if(_system->VS->CheckDep(vs,
+						   revdep->CompareOp,
+						   revdep.TargetVer()))
+			    {
+			      mark_keep(p, false, false, undo);
+			      do_delete=false;
+			      break;
+			    }
+			}
+		    }
+		}
+
+	      if(do_delete)
+		mark_delete(p, false, true, undo);
+	    }
+#endif
+     }
+  }
+
+   // cleanup
+   for(unsigned int i=0;i<neverAutoRemoveRegexp.size();i++)
+      regfree(neverAutoRemoveRegexp[i]);
+   
+
+   return true;
+}