// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
-// $Id: orderlist.cc,v 1.9 1999/11/04 06:05:02 jgg Exp $
+// $Id: orderlist.cc,v 1.14 2001/05/07 05:49:43 jgg Exp $
/* ######################################################################
Order List - Represents and Manipulates an ordered list of packages.
A list of packages can be ordered by a number of conflicting criteria
each given a specific priority. Each package also has a set of flags
- indicating some usefull things about it that are derived in the
+ indicating some useful things about it that are derived in the
course of sorting. The pkgPackageManager class uses this class for
all of it's installation ordering needs.
ordering.
Each of the features can be enabled in the sorting routine at an
- arbitary priority to give quite abit of control over the final unpacking
+ arbitrary priority to give quite abit of control over the final unpacking
order.
The rules listed above may never be violated and are called Critical.
When a critical rule is violated then a loop condition is recorded
and will have to be delt with in the caller.
+
+ The ordering keeps two lists, the main list and the 'After List'. The
+ purpose of the after list is to allow packages to be delayed. This is done
+ by setting the after flag on the package. Any package which requires this
+ package to be ordered before will inherit the after flag and so on. This
+ is used for CD swap ordering where all packages on a second CD have the
+ after flag set. This forces them and all their dependents to be ordered
+ toward the end.
+
+ There are complications in this algorithm when presented with cycles.
+ For all known practical cases it works, all cases where it doesn't work
+ is fixable by tweaking the package descriptions. However, it should be
+ possible to impove this further to make some better choices when
+ presented with cycles.
##################################################################### */
/*}}}*/
// Include Files /*{{{*/
-#ifdef __GNUG__
-#pragma implementation "apt-pkg/orderlist.h"
-#endif
#include <apt-pkg/orderlist.h>
#include <apt-pkg/depcache.h>
#include <apt-pkg/error.h>
#include <apt-pkg/version.h>
+#include <apt-pkg/sptr.h>
+#include <apt-pkg/configuration.h>
+
+#include <iostream>
/*}}}*/
+using namespace std;
+
pkgOrderList *pkgOrderList::Me = 0;
// OrderList::pkgOrderList - Constructor /*{{{*/
// ---------------------------------------------------------------------
/* */
-pkgOrderList::pkgOrderList(pkgDepCache &Cache) : Cache(Cache)
+pkgOrderList::pkgOrderList(pkgDepCache *pCache) : Cache(*pCache)
{
FileList = 0;
Primary = 0;
RevDepends = 0;
Remove = 0;
LoopCount = -1;
-
+ Debug = _config->FindB("Debug::pkgOrderList",false);
+
/* Construct the arrays, egcs 1.0.1 bug requires the package count
hack */
- unsigned long Size = Cache.HeaderP->PackageCount;
- Flags = new unsigned char[Size];
+ unsigned long Size = Cache.Head().PackageCount;
+ Flags = new unsigned short[Size];
End = List = new Package *[Size];
memset(Flags,0,sizeof(*Flags)*Size);
}
if (Pkg.State() == pkgCache::PkgIterator::NeedsConfigure &&
Cache[Pkg].Keep() == true)
return false;
+
+ if (FileList == 0)
+ return false;
- if (FileList != 0 && FileList[Pkg->ID].empty() == false)
+ if (FileList[Pkg->ID].empty() == false)
return false;
return true;
}
/*}}}*/
-
// OrderList::DoRun - Does an order run /*{{{*/
// ---------------------------------------------------------------------
/* The caller is expeted to have setup the desired probe state */
bool pkgOrderList::DoRun()
{
// Temp list
- unsigned long Size = Cache.HeaderP->PackageCount;
- Package **NList = new Package *[Size];
-
+ unsigned long Size = Cache.Head().PackageCount;
+ SPtrArray<Package *> NList = new Package *[Size];
+ SPtrArray<Package *> AfterList = new Package *[Size];
+ AfterEnd = AfterList;
+
Depth = 0;
WipeFlags(Added | AddPending | Loop | InList);
for (iterator I = List; I != End; I++)
Flag(*I,InList);
-
+
// Rebuild the main list into the temp list.
iterator OldEnd = End;
End = NList;
if (VisitNode(PkgIterator(Cache,*I)) == false)
{
End = OldEnd;
- delete [] NList;
return false;
}
+ // Copy the after list to the end of the main list
+ for (Package **I = AfterList; I != AfterEnd; I++)
+ *End++ = *I;
+
// Swap the main list to the new list
delete [] List;
- List = NList;
+ List = NList.UnGuard();
return true;
}
/*}}}*/
bool pkgOrderList::OrderCritical()
{
FileList = 0;
-
- Primary = &pkgOrderList::DepUnPackPre;
+
+ Primary = &pkgOrderList::DepUnPackPreD;
Secondary = 0;
RevDepends = 0;
Remove = 0;
LoopCount = 0;
-
+
// Sort
Me = this;
- qsort(List,End - List,sizeof(*List),&OrderCompareB);
-
+ qsort(List,End - List,sizeof(*List),&OrderCompareB);
+
if (DoRun() == false)
return false;
-
+
if (LoopCount != 0)
return _error->Error("Fatal, predepends looping detected");
+
+ if (Debug == true)
+ {
+ clog << "** Critical Unpack ordering done" << endl;
+
+ for (iterator I = List; I != End; I++)
+ {
+ PkgIterator P(Cache,*I);
+ if (IsNow(P) == true)
+ clog << " " << P.Name() << ' ' << IsMissing(P) << ',' << IsFlag(P,After) << endl;
+ }
+ }
+
return true;
}
/*}}}*/
{
this->FileList = FileList;
+ // Setup the after flags
+ if (FileList != 0)
+ {
+ WipeFlags(After);
+
+ // Set the inlist flag
+ for (iterator I = List; I != End; I++)
+ {
+ PkgIterator P(Cache,*I);
+ if (IsMissing(P) == true && IsNow(P) == true)
+ Flag(*I,After);
+ }
+ }
+
Primary = &pkgOrderList::DepUnPackCrit;
Secondary = &pkgOrderList::DepConfigure;
RevDepends = &pkgOrderList::DepUnPackDep;
Me = this;
qsort(List,End - List,sizeof(*List),&OrderCompareA);
+ if (Debug == true)
+ clog << "** Pass A" << endl;
if (DoRun() == false)
return false;
-
+
+ if (Debug == true)
+ clog << "** Pass B" << endl;
Secondary = 0;
if (DoRun() == false)
return false;
+ if (Debug == true)
+ clog << "** Pass C" << endl;
LoopCount = 0;
RevDepends = 0;
Remove = 0; // Otherwise the libreadline remove problem occures
if (DoRun() == false)
return false;
+ if (Debug == true)
+ clog << "** Pass D" << endl;
LoopCount = 0;
Primary = &pkgOrderList::DepUnPackPre;
if (DoRun() == false)
return false;
-/* cout << "----------END" << endl;
-
- for (iterator I = List; I != End; I++)
+ if (Debug == true)
{
- PkgIterator P(Cache,*I);
- cout << P.Name() << endl;
- }*/
+ clog << "** Unpack ordering done" << endl;
+
+ for (iterator I = List; I != End; I++)
+ {
+ PkgIterator P(Cache,*I);
+ if (IsNow(P) == true)
+ clog << " " << P.Name() << ' ' << IsMissing(P) << ',' << IsFlag(P,After) << endl;
+ }
+ }
return true;
}
return DoRun();
}
/*}}}*/
-
// OrderList::Score - Score the package for sorting /*{{{*/
// ---------------------------------------------------------------------
/* Higher scores order earlier */
int pkgOrderList::Score(PkgIterator Pkg)
{
+ static int const ScoreDelete = _config->FindI("OrderList::Score::Delete", 500);
+
// Removal is always done first
if (Cache[Pkg].Delete() == true)
- return 200;
-
+ return ScoreDelete;
+
// This should never happen..
if (Cache[Pkg].InstVerIter(Cache).end() == true)
return -1;
-
+
+ static int const ScoreEssential = _config->FindI("OrderList::Score::Essential", 200);
+ static int const ScoreImmediate = _config->FindI("OrderList::Score::Immediate", 10);
+ static int const ScorePreDepends = _config->FindI("OrderList::Score::PreDepends", 50);
+
int Score = 0;
if ((Pkg->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential)
- Score += 100;
+ Score += ScoreEssential;
- for (DepIterator D = Cache[Pkg].InstVerIter(Cache).DependsList();
+ if (IsFlag(Pkg,Immediate) == true)
+ Score += ScoreImmediate;
+
+ for (DepIterator D = Cache[Pkg].InstVerIter(Cache).DependsList();
D.end() == false; D++)
if (D->Type == pkgCache::Dep::PreDepends)
{
- Score += 50;
+ Score += ScorePreDepends;
break;
}
-
+
// Important Required Standard Optional Extra
signed short PrioMap[] = {0,5,4,3,1,0};
if (Cache[Pkg].InstVerIter(Cache)->Priority <= 5)
// We order packages with a set state toward the front
int Res;
- if ((Res = BoolCompare(Me->IsNow(A),Me->IsNow(B))) == 0)
+ if ((Res = BoolCompare(Me->IsNow(A),Me->IsNow(B))) != 0)
return -1*Res;
// We order missing files to toward the end
- if (Me->FileList != 0)
+/* if (Me->FileList != 0)
{
if ((Res = BoolCompare(Me->IsMissing(A),
- Me->IsMissing(B))) == 0)
+ Me->IsMissing(B))) != 0)
return Res;
- }
+ }*/
if (A.State() != pkgCache::PkgIterator::NeedsNothing &&
B.State() == pkgCache::PkgIterator::NeedsNothing)
int ScoreA = Me->Score(A);
int ScoreB = Me->Score(B);
+
if (ScoreA > ScoreB)
return -1;
/*}}}*/
// OrderList::OrderCompareB - Order the installation by source /*{{{*/
// ---------------------------------------------------------------------
-/* This orders by installation source. This is usefull to handle
+/* This orders by installation source. This is useful to handle
inter-source breaks */
int pkgOrderList::OrderCompareB(const void *a, const void *b)
{
int ScoreA = Me->Score(A);
int ScoreB = Me->Score(B);
+
if (ScoreA > ScoreB)
return -1;
return strcmp(A.Name(),B.Name());
}
/*}}}*/
-
// OrderList::VisitDeps - Visit forward install dependencies /*{{{*/
// ---------------------------------------------------------------------
/* This calls the dependency function for the normal forwards dependencies
/* This routine calls visit on all providing packages. */
bool pkgOrderList::VisitProvides(DepIterator D,bool Critical)
{
- Version **List = D.AllTargets();
+ SPtrArray<Version *> List = D.AllTargets();
for (Version **I = List; *I != 0; I++)
{
VerIterator Ver(Cache,*I);
if (Cache[Pkg].Keep() == true && Pkg.State() == PkgIterator::NeedsNothing)
continue;
- if (D->Type != pkgCache::Dep::Conflicts && Cache[Pkg].InstallVer != *I)
+ if (D->Type != pkgCache::Dep::Conflicts &&
+ D->Type != pkgCache::Dep::DpkgBreaks &&
+ D->Type != pkgCache::Dep::Obsoletes &&
+ Cache[Pkg].InstallVer != *I)
continue;
- if (D->Type == pkgCache::Dep::Conflicts && (Version *)Pkg.CurrentVer() != *I)
+ if ((D->Type == pkgCache::Dep::Conflicts ||
+ D->Type == pkgCache::Dep::DpkgBreaks ||
+ D->Type == pkgCache::Dep::Obsoletes) &&
+ (Version *)Pkg.CurrentVer() != *I)
continue;
// Skip over missing files
continue;
if (VisitNode(Pkg) == false)
- {
- delete [] List;
return false;
- }
}
- delete [] List;
return true;
}
/*}}}*/
IsFlag(Pkg,AddPending) == true || IsFlag(Pkg,InList) == false)
return true;
-/* for (int j = 0; j != Depth; j++) cout << ' ';
- cout << "Visit " << Pkg.Name() << endl;*/
+ if (Debug == true)
+ {
+ for (int j = 0; j != Depth; j++) clog << ' ';
+ clog << "Visit " << Pkg.Name() << endl;
+ }
+
Depth++;
// Color grey
if (IsFlag(Pkg,Added) == false)
{
Flag(Pkg,Added,Added | AddPending);
- *End = Pkg;
- End++;
+ if (IsFlag(Pkg,After) == true)
+ *AfterEnd++ = Pkg;
+ else
+ *End++ = Pkg;
}
Primary = Old;
Depth--;
-
-/* for (int j = 0; j != Depth; j++) cout << ' ';
- cout << "Leave " << Pkg.Name() << ' ' << IsFlag(Pkg,Added) << ',' << IsFlag(Pkg,AddPending) << endl;*/
+ if (Debug == true)
+ {
+ for (int j = 0; j != Depth; j++) clog << ' ';
+ clog << "Leave " << Pkg.Name() << ' ' << IsFlag(Pkg,Added) << ',' << IsFlag(Pkg,AddPending) << endl;
+ }
+
return true;
}
/*}}}*/
-
// OrderList::DepUnPackCrit - Critical UnPacking ordering /*{{{*/
// ---------------------------------------------------------------------
/* Critical unpacking ordering strives to satisfy Conflicts: and
{
/* Reverse depenanices are only interested in conflicts,
predepend breakage is ignored here */
- if (D->Type != pkgCache::Dep::Conflicts)
+ if (D->Type != pkgCache::Dep::Conflicts &&
+ D->Type != pkgCache::Dep::Obsoletes)
continue;
// Duplication elimination, consider only the current version
{
/* Forward critical dependencies MUST be correct before the
package can be unpacked. */
- if (D->Type != pkgCache::Dep::Conflicts && D->Type != pkgCache::Dep::PreDepends)
+ if (D->Type != pkgCache::Dep::Conflicts &&
+ D->Type != pkgCache::Dep::DpkgBreaks &&
+ D->Type != pkgCache::Dep::Obsoletes &&
+ D->Type != pkgCache::Dep::PreDepends)
continue;
/* We wish to check if the dep is okay in the now state of the
// ---------------------------------------------------------------------
/* Critical PreDepends (also configure immediate and essential) strives to
ensure not only that all conflicts+predepends are met but that this
- package will be immediately configurable when it is unpacked.
-
+ package will be immediately configurable when it is unpacked.
Loops are preprocessed and logged. */
bool pkgOrderList::DepUnPackPreD(DepIterator D)
{
else
continue;
}
-
+
/* We wish to check if the dep is okay in the now state of the
target package against the install state of this package. */
if (CheckDep(D) == true)
if (IsFlag(D.TargetPkg(),AddPending) == false)
continue;
}
-
+
// This is the loop detection
if (IsFlag(D.TargetPkg(),Added) == true ||
IsFlag(D.TargetPkg(),AddPending) == true)
return false;
}
else
+ {
if (D->Type == pkgCache::Dep::Depends)
if (VisitProvides(D,false) == false)
return false;
+
+ if (D->Type == pkgCache::Dep::DpkgBreaks)
+ {
+ if (CheckDep(D) == true)
+ continue;
+
+ if (VisitNode(D.TargetPkg()) == false)
+ return false;
+ }
+ }
}
return true;
}
return true;
}
/*}}}*/
-
// OrderList::AddLoop - Add a loop to the loop list /*{{{*/
// ---------------------------------------------------------------------
/* We record the loops. This is a relic since loop breaking is done
/* */
void pkgOrderList::WipeFlags(unsigned long F)
{
- unsigned long Size = Cache.HeaderP->PackageCount;
+ unsigned long Size = Cache.Head().PackageCount;
for (unsigned long I = 0; I != Size; I++)
Flags[I] &= ~F;
}
this fails to produce a suitable result. */
bool pkgOrderList::CheckDep(DepIterator D)
{
- Version **List = D.AllTargets();
+ SPtrArray<Version *> List = D.AllTargets();
+ bool Hit = false;
for (Version **I = List; *I != 0; I++)
{
VerIterator Ver(Cache,*I);
way ordering works Added means the package will be unpacked
before this one and AddPending means after. It is therefore
correct to ignore AddPending in all cases, but that exposes
- reverse-ordering loops which should be ignore. */
- if (IsFlag(Pkg,Added) == true ||
+ reverse-ordering loops which should be ignored. */
+ if (IsFlag(Pkg,Added) == true ||
(IsFlag(Pkg,AddPending) == true && D.Reverse() == true))
{
if (Cache[Pkg].InstallVer != *I)
Pkg.State() != PkgIterator::NeedsNothing)
continue;
- delete [] List;
-
/* Conflicts requires that all versions are not present, depends
just needs one */
- if (D->Type != pkgCache::Dep::Conflicts)
+ if (D->Type != pkgCache::Dep::Conflicts &&
+ D->Type != pkgCache::Dep::DpkgBreaks &&
+ D->Type != pkgCache::Dep::Obsoletes)
+ {
+ /* Try to find something that does not have the after flag set
+ if at all possible */
+ if (IsFlag(Pkg,After) == true)
+ {
+ Hit = true;
+ continue;
+ }
+
return true;
+ }
else
+ {
+ if (IsFlag(Pkg,After) == true)
+ Flag(D.ParentPkg(),After);
+
return false;
+ }
}
- delete [] List;
-
+
+ // We found a hit, but it had the after flag set
+ if (Hit == true && D->Type == pkgCache::Dep::PreDepends)
+ {
+ Flag(D.ParentPkg(),After);
+ return true;
+ }
+
/* Conflicts requires that all versions are not present, depends
just needs one */
- if (D->Type == pkgCache::Dep::Conflicts)
+ if (D->Type == pkgCache::Dep::Conflicts ||
+ D->Type == pkgCache::Dep::Obsoletes)
return true;
return false;
}
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