* slighly more debug output, renamed "--automatic-remove" to "--auto-remove"

[apt.git] / apt-pkg / algorithms.cc

diff --git a/apt-pkg/algorithms.cc b/apt-pkg/algorithms.cc
index 5167d11eb06ab560dac546ebd12607795d174211..3978e7561a12a0e441ee6d62c9b3d8c126b75787 100644 (file)
--- 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/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 <apt-pkg/sptr.h>

+

     
 #include <apti18n.h>
     
 #include <apti18n.h>

-    
+#include <sys/types.h>
+#include <regex.h>

 #include <iostream>
                                                                        /*}}}*/
 using namespace std;
 #include <iostream>
                                                                        /*}}}*/
 using namespace std;


@@ -1248,106 +1252,240 @@ void pkgPrioSortList(pkgCache &Cache,pkgCache::Version **List)
                                                                        /*}}}*/
 
 
                                                                        /*}}}*/
 
 

-// pkgMarkPkgUsed - Mark used packages as dirty                                /*{{{*/
-// ---------------------------------------------------------------------
-/* Mark all reachable packages as dirty. */
-void pkgMarkPkgUsed(pkgDepCache &Cache, pkgCache::PkgIterator Pkg, 
-                  pkgCache::State::PkgRemoveState DirtLevel)
+// 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)

 {
 {

-   // If it is not installed, and we are in manual mode, ignore it
-   if ((Pkg->CurrentVer == 0 && Cache[Pkg].Install() == false || Cache[Pkg].Delete() == true) &&
-       DirtLevel == pkgCache::State::RemoveManual) 
+   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) 

    {
    {

-//      fprintf(stdout,"This one is not installed/virtual %s %d %d\n", Pkg.Name(), Pkg->AutomaticRemove, DirtLevel);
-      return;
+      if(ver==candver)
+        mark_install(pkg, false, false, NULL);
+      else if(ver==pkg.CurrentVer())
+        MarkKeep(pkg);
+      
+      instver=state.InstVerIter(*this);

    }
    }

+#endif

 
 

-   // If it is not installed, and it is not virtual, ignore it
-   if ((Pkg->CurrentVer == 0 && Cache[Pkg].Install() == false || Cache[Pkg].Delete() == true) &&
-       Pkg->VersionList != 0)
-   {
-//      fprintf(stdout,"This one is not installed %s %d %d\n", Pkg.Name(), Pkg->AutomaticRemove, DirtLevel);
+   // 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;
       return;

-   }

 
 

-   // If it is similar or more dirty than we are ;-), because we've been here already, don't mark it
-   // This is necessary because virtual packages just relay the current level,
-   // so it may be possible e.g. that this was already seen with ::RemoveSuggested, but
-   // we are ::RemoveRequired
-   if (Cache[Pkg].Dirty() >= DirtLevel) 
-   {
-      //fprintf(stdout,"Seen already %s %d %d\n", Pkg.Name(), Pkg->AutomaticRemove, DirtLevel);
+   // if we are marked already we are done
+   if(state.Marked)

       return;
       return;

-   }
-   
-   // If it is less important than the current DirtLevel, don't mark it
-   if (Cache[Pkg].AutomaticRemove != pkgCache::State::RemoveManual && 
-      Cache[Pkg].AutomaticRemove > DirtLevel) 
+
+   //std::cout << "Setting Marked for: " << pkg.Name() << std::endl;
+   state.Marked=true;
+
+   if(!ver.end())

    {
    {

-//       fprintf(stdout,"We don't need %s %d %d %d\n", Pkg.Name(), Pkg->AutomaticRemove, DirtLevel, Cache[Pkg].Dirty());
-       return;
+     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);
+             }
+          }
+       }
+     }

    }
    }

+}
+

 
 

-   // Mark it as used
-   Cache.SetDirty(Pkg, DirtLevel);
-       
-   //fprintf(stdout,"We keep %s %d %d\n", Pkg.Name(), Pkg->AutomaticRemove, DirtLevel);
+// 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;
+}

 
 

-   // We are a virtual package
-   if (Pkg->VersionList == 0)
+// 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)

    {
    {

-//      fprintf(stdout,"We are virtual %s %d %d\n", Pkg.Name(), Pkg->AutomaticRemove, DirtLevel);
-      for (pkgCache::PrvIterator Prv = Pkg.ProvidesList(); ! Prv.end(); ++Prv)
-        pkgMarkPkgUsed (Cache, Prv.OwnerPkg(), DirtLevel);
-      return;
+      Cache[p].Marked=false;
+      Cache[p].Garbage=false;
+
+      // debug output
+      if(_config->FindB("Debug::pkgAutoRemove",false) 
+        && Cache[p].Flags & pkgCache::Flag::Auto)
+        std::clog << "AutoDep: " << p.Name() << std::endl;

    }
 
    }
 

-   // Depending on the type of dependency, follow it
-   for (pkgCache::DepIterator D = Cache[Pkg].InstVerIter(Cache).DependsList(); ! D.end(); ++D) 
+   // 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)

    {
    {

-//      fprintf(stdout,"We depend on %s %s\n", D.TargetPkg().Name(), D.DepType());
+      Opts = Opts->Child;
+      for (; Opts != 0; Opts = Opts->Next)
+      {
+        if (Opts->Value.empty() == true)
+           continue;

 
 

-      switch(D->Type) 
+        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))
+          

       {
       {

-        case pkgCache::Dep::Depends:
-        case pkgCache::Dep::PreDepends:
-           pkgMarkPkgUsed (Cache, D.TargetPkg(), pkgCache::State::RemoveRequired);
-           break;
-        case pkgCache::Dep::Recommends:
-            pkgMarkPkgUsed (Cache, D.TargetPkg(), pkgCache::State::RemoveRecommended);
-           break;
-         case pkgCache::Dep::Suggests:
-            pkgMarkPkgUsed (Cache, D.TargetPkg(), pkgCache::State::RemoveSuggested);
-           break;
-        case pkgCache::Dep::Conflicts:
-        case pkgCache::Dep::Replaces:
-        case pkgCache::Dep::Obsoletes:
-           // We don't handle these here
-           break;
+        // 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);

       }
    }
       }
    }

-//   fprintf(stdout,"We keep %s %d %d <END>\n", Pkg.Name(), Pkg->AutomaticRemove, DirtLevel);
-}
-                                                                       /*}}}*/

 
 

-bool pkgMarkUsed(pkgDepCache &Cache)
-{
-   // debug only
-   if(_config->FindI("Debug::pkgAutoRemove",false) == true)
-     for (pkgCache::PkgIterator Pkg = Cache.PkgBegin(); ! Pkg.end(); ++Pkg)
-        if(!Cache[Pkg].Dirty() && Cache[Pkg].AutomaticRemove > 0)
-          std::clog << "has auto-remove information: " << Pkg.Name() 
-                    << " " << (int)Cache[Pkg].AutomaticRemove 
-                    << std::endl;
-
-   // init with defaults
-   for (pkgCache::PkgIterator Pkg = Cache.PkgBegin(); ! Pkg.end(); ++Pkg)
-      Cache.SetDirty(Pkg, pkgCache::State::RemoveUnknown);
-
-   // go recursive over the cache
-   for (pkgCache::PkgIterator Pkg = Cache.PkgBegin(); ! Pkg.end(); ++Pkg) 
-      pkgMarkPkgUsed (Cache, Pkg, pkgCache::State::RemoveManual);

 
 

+   // do the sweep
+   for(pkgCache::PkgIterator p=Cache.PkgBegin(); !p.end(); ++p)
+  {
+     pkgDepCache::StateCache &state=Cache[p];
+
+     // if it is not marked and it is installed, it's garbage 
+     if(!state.Marked && !p.CurrentVer().end())
+     {
+       state.Garbage=true;
+       if(_config->FindB("Debug::pkgAutoRemove",false))
+          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;
 }
    return true;
 }