X-Git-Url: http://git.hcoop.net/ntk/apt.git/blobdiff_plain/9f3713fc037ca363b514c8d8f7cbb65fdab2e8b1..0fa3c89c9e5c2c61a70c714ef8e4ac9d2b7d6ae1:/apt-pkg/depcache.cc

diff --git a/apt-pkg/depcache.cc b/apt-pkg/depcache.cc
index 9f8422fe..a06789cd 100644
--- a/apt-pkg/depcache.cc
+++ b/apt-pkg/depcache.cc
@@ -864,6 +864,11 @@ bool pkgDepCache::MarkDelete(PkgIterator const &Pkg, bool rPurge,
    dpkg holds are enforced by the private IsModeChangeOk */
 bool pkgDepCache::IsDeleteOk(PkgIterator const &Pkg,bool rPurge,
 			      unsigned long Depth, bool FromUser)
+{
+   return IsDeleteOkProtectInstallRequests(Pkg, rPurge, Depth, FromUser);
+}
+bool pkgDepCache::IsDeleteOkProtectInstallRequests(PkgIterator const &Pkg,
+      bool const rPurge, unsigned long const Depth, bool const FromUser)
 {
    if (FromUser == false && Pkg->CurrentVer == 0)
    {
@@ -891,6 +896,7 @@ char const* PrintMode(char const mode)
 	 case pkgDepCache::ModeInstall: return "Install";
 	 case pkgDepCache::ModeKeep: return "Keep";
 	 case pkgDepCache::ModeDelete: return "Delete";
+	 case pkgDepCache::ModeGarbage: return "Garbage";
 	 default: return "UNKNOWN";
 	 }
 }
@@ -1002,9 +1008,6 @@ struct CompareProviders {
 	 else if ((B->Flags & pkgCache::Flag::Important) == pkgCache::Flag::Important)
 	    return true;
       }
-      // higher priority seems like a good idea
-      if (AV->Priority != BV->Priority)
-	 return AV->Priority > BV->Priority;
       // prefer native architecture
       if (strcmp(A.Arch(), B.Arch()) != 0)
       {
@@ -1019,6 +1022,9 @@ struct CompareProviders {
 	    else if (*a == B.Arch())
 	       return true;
       }
+      // higher priority seems like a good idea
+      if (AV->Priority != BV->Priority)
+	 return AV->Priority > BV->Priority;
       // unable to decide…
       return A->ID < B->ID;
    }
@@ -1047,9 +1053,10 @@ bool pkgDepCache::MarkInstall(PkgIterator const &Pkg,bool AutoInst,
       return true;
    }
 
-   // check if we are allowed to install the package
-   if (IsInstallOk(Pkg,AutoInst,Depth,FromUser) == false)
-      return false;
+   // check if we are allowed to install the package (if we haven't already)
+   if (P.Mode != ModeInstall || P.InstallVer != P.CandidateVer)
+      if (IsInstallOk(Pkg,AutoInst,Depth,FromUser) == false)
+	 return false;
 
    ActionGroup group(*this);
    P.iFlags &= ~AutoKept;
@@ -1271,11 +1278,50 @@ bool pkgDepCache::MarkInstall(PkgIterator const &Pkg,bool AutoInst,
 									/*}}}*/
 // DepCache::IsInstallOk - check if it is ok to install this package	/*{{{*/
 // ---------------------------------------------------------------------
-/* The default implementation does nothing.
+/* The default implementation checks if the installation of an M-A:same
+   package would lead us into a version-screw and if so forbids it.
    dpkg holds are enforced by the private IsModeChangeOk */
 bool pkgDepCache::IsInstallOk(PkgIterator const &Pkg,bool AutoInst,
 			      unsigned long Depth, bool FromUser)
 {
+   return IsInstallOkMultiArchSameVersionSynced(Pkg,AutoInst, Depth, FromUser);
+}
+bool pkgDepCache::IsInstallOkMultiArchSameVersionSynced(PkgIterator const &Pkg,
+      bool const AutoInst, unsigned long const Depth, bool const FromUser)
+{
+   if (FromUser == true) // as always: user is always right
+      return true;
+
+   // ignore packages with none-M-A:same candidates
+   VerIterator const CandVer = PkgState[Pkg->ID].CandidateVerIter(*this);
+   if (unlikely(CandVer.end() == true) || CandVer == Pkg.CurrentVer() ||
+	 (CandVer->MultiArch & pkgCache::Version::Same) != pkgCache::Version::Same)
+      return true;
+
+   GrpIterator const Grp = Pkg.Group();
+   for (PkgIterator P = Grp.PackageList(); P.end() == false; P = Grp.NextPkg(P))
+   {
+      // not installed or version synced: fine by definition
+      // (simple string-compare as stuff like '1' == '0:1-0' can't happen here)
+      if (P->CurrentVer == 0 || strcmp(Pkg.CandVersion(), P.CandVersion()) == 0)
+	 continue;
+      // packages loosing M-A:same can be out-of-sync
+      VerIterator CV = PkgState[P->ID].CandidateVerIter(*this);
+      if (unlikely(CV.end() == true) ||
+	    (CV->MultiArch & pkgCache::Version::Same) != pkgCache::Version::Same)
+	 continue;
+
+      // not downloadable means the package is obsolete, so allow out-of-sync
+      if (CV.Downloadable() == false)
+	 continue;
+
+      PkgState[Pkg->ID].iFlags |= AutoKept;
+      if (unlikely(DebugMarker == true))
+	 std::clog << OutputInDepth(Depth) << "Ignore MarkInstall of " << Pkg
+	    << " as its M-A:same siblings are not version-synced" << std::endl;
+      return false;
+   }
+
    return true;
 }
 									/*}}}*/
@@ -1681,8 +1727,6 @@ bool pkgDepCache::MarkRequired(InRootSetFunc &userFunc)
    follow_recommends = MarkFollowsRecommends();
    follow_suggests   = MarkFollowsSuggests();
 
-
-
    // do the mark part, this is the core bit of the algorithm
    for(PkgIterator p = PkgBegin(); !p.end(); ++p)
    {
@@ -1693,7 +1737,9 @@ bool pkgDepCache::MarkRequired(InRootSetFunc &userFunc)
 	  // be nice even then a required package violates the policy (#583517)
 	  // and do the full mark process also for required packages
 	  (p.CurrentVer().end() != true &&
-	   p.CurrentVer()->Priority == pkgCache::State::Required))
+	   p.CurrentVer()->Priority == pkgCache::State::Required) ||
+	  // packages which can't be changed (like holds) can't be garbage
+	  (IsModeChangeOk(ModeGarbage, p, 0, false) == false))
       {
 	 // the package is installed (and set to keep)
 	 if(PkgState[p->ID].Keep() && !p.CurrentVer().end())