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-rw-r--r--apt-pkg/orderlist.cc50
1 files changed, 43 insertions, 7 deletions
diff --git a/apt-pkg/orderlist.cc b/apt-pkg/orderlist.cc
index 2fc0b6927..cae5b0a48 100644
--- a/apt-pkg/orderlist.cc
+++ b/apt-pkg/orderlist.cc
@@ -495,33 +495,69 @@ bool pkgOrderList::VisitRProvides(DepFunc F,VerIterator Ver)
/*}}}*/
// OrderList::VisitProvides - Visit all of the providing packages /*{{{*/
// ---------------------------------------------------------------------
-/* This routine calls visit on all providing packages. */
+/* This routine calls visit on all providing packages.
+
+ If the dependency is negative it first visits packages which are
+ intended to be removed and after that all other packages.
+ It does so to avoid situations in which this package is used to
+ satisfy a (or-group/provides) dependency of another package which
+ could have been satisfied also by upgrading another package -
+ otherwise we have more broken packages dpkg needs to auto-
+ deconfigure and in very complicated situations it even decides
+ against it! */
bool pkgOrderList::VisitProvides(DepIterator D,bool Critical)
-{
+{
SPtrArray<Version *> List = D.AllTargets();
- for (Version **I = List; *I != 0; I++)
+ for (Version **I = List; *I != 0; ++I)
{
VerIterator Ver(Cache,*I);
PkgIterator Pkg = Ver.ParentPkg();
+ if (D.IsNegative() == true && Cache[Pkg].Delete() == false)
+ continue;
+
if (Cache[Pkg].Keep() == true && Pkg.State() == PkgIterator::NeedsNothing)
continue;
-
+
if (D.IsNegative() == false &&
Cache[Pkg].InstallVer != *I)
continue;
-
+
if (D.IsNegative() == true &&
(Version *)Pkg.CurrentVer() != *I)
continue;
-
+
+ // Skip over missing files
+ if (Critical == false && IsMissing(D.ParentPkg()) == true)
+ continue;
+
+ if (VisitNode(Pkg, "Provides-1") == false)
+ return false;
+ }
+ if (D.IsNegative() == false)
+ return true;
+ for (Version **I = List; *I != 0; ++I)
+ {
+ VerIterator Ver(Cache,*I);
+ PkgIterator Pkg = Ver.ParentPkg();
+
+ if (Cache[Pkg].Delete() == true)
+ continue;
+
+ if (Cache[Pkg].Keep() == true && Pkg.State() == PkgIterator::NeedsNothing)
+ continue;
+
+ if ((Version *)Pkg.CurrentVer() != *I)
+ continue;
+
// Skip over missing files
if (Critical == false && IsMissing(D.ParentPkg()) == true)
continue;
- if (VisitNode(Pkg, "Provides") == false)
+ if (VisitNode(Pkg, "Provides-2") == false)
return false;
}
+
return true;
}
/*}}}*/