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depcache.cc
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// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
// $Id: depcache.cc,v 1.25 2001/05/27 05:36:04 jgg Exp $
/* ######################################################################
Dependency Cache - Caches Dependency information.
##################################################################### */
/*}}}*/
// Include Files /*{{{*/
#include<config.h>
#include <apt-pkg/depcache.h>
#include <apt-pkg/version.h>
#include <apt-pkg/versionmatch.h>
#include <apt-pkg/error.h>
#include <apt-pkg/sptr.h>
#include <apt-pkg/algorithms.h>
#include <apt-pkg/fileutl.h>
#include <apt-pkg/strutl.h>
#include <apt-pkg/configuration.h>
#include <apt-pkg/aptconfiguration.h>
#include <apt-pkg/pkgsystem.h>
#include <apt-pkg/tagfile.h>
#include <apt-pkg/progress.h>
#include <apt-pkg/cacheset.h>
#include <algorithm>
#include <iostream>
#include <sstream>
#include <set>
#include <sys/stat.h>
#include <apti18n.h>
/*}}}*/
using std::string;
// helper for Install-Recommends-Sections and Never-MarkAuto-Sections /*{{{*/
static bool
ConfigValueInSubTree(const char* SubTree, const char *needle)
{
Configuration::Item const *Opts;
Opts = _config->Tree(SubTree);
if (Opts != 0 && Opts->Child != 0)
{
Opts = Opts->Child;
for (; Opts != 0; Opts = Opts->Next)
{
if (Opts->Value.empty() == true)
continue;
if (strcmp(needle, Opts->Value.c_str()) == 0)
return true;
}
}
return false;
}
/*}}}*/
pkgDepCache::ActionGroup::ActionGroup(pkgDepCache &cache) : /*{{{*/
cache(cache), released(false)
{
++cache.group_level;
}
void pkgDepCache::ActionGroup::release()
{
if(!released)
{
if(cache.group_level == 0)
std::cerr << "W: Unbalanced action groups, expect badness" << std::endl;
else
{
--cache.group_level;
if(cache.group_level == 0)
cache.MarkAndSweep();
}
released = true;
}
}
pkgDepCache::ActionGroup::~ActionGroup()
{
release();
}
/*}}}*/
// DepCache::pkgDepCache - Constructors /*{{{*/
// ---------------------------------------------------------------------
/* */
pkgDepCache::pkgDepCache(pkgCache *pCache,Policy *Plcy) :
group_level(0), Cache(pCache), PkgState(0), DepState(0)
{
DebugMarker = _config->FindB("Debug::pkgDepCache::Marker", false);
DebugAutoInstall = _config->FindB("Debug::pkgDepCache::AutoInstall", false);
delLocalPolicy = 0;
LocalPolicy = Plcy;
if (LocalPolicy == 0)
delLocalPolicy = LocalPolicy = new Policy;
}
/*}}}*/
// DepCache::~pkgDepCache - Destructor /*{{{*/
// ---------------------------------------------------------------------
/* */
pkgDepCache::~pkgDepCache()
{
delete [] PkgState;
delete [] DepState;
delete delLocalPolicy;
}
/*}}}*/
// DepCache::Init - Generate the initial extra structures. /*{{{*/
// ---------------------------------------------------------------------
/* This allocats the extension buffers and initializes them. */
bool pkgDepCache::Init(OpProgress *Prog)
{
// Suppress mark updates during this operation (just in case) and
// run a mark operation when Init terminates.
ActionGroup actions(*this);
delete [] PkgState;
delete [] DepState;
PkgState = new StateCache[Head().PackageCount];
DepState = new unsigned char[Head().DependsCount];
memset(PkgState,0,sizeof(*PkgState)*Head().PackageCount);
memset(DepState,0,sizeof(*DepState)*Head().DependsCount);
if (Prog != 0)
{
Prog->OverallProgress(0,2*Head().PackageCount,Head().PackageCount,
_("Building dependency tree"));
Prog->SubProgress(Head().PackageCount,_("Candidate versions"));
}
/* Set the current state of everything. In this state all of the
packages are kept exactly as is. See AllUpgrade */
int Done = 0;
for (PkgIterator I = PkgBegin(); I.end() != true; ++I, ++Done)
{
if (Prog != 0 && Done%20 == 0)
Prog->Progress(Done);
// Find the proper cache slot
StateCache &State = PkgState[I->ID];
State.iFlags = 0;
// Figure out the install version
State.CandidateVer = GetCandidateVer(I);
State.InstallVer = I.CurrentVer();
State.Mode = ModeKeep;
State.Update(I,*this);
}
if (Prog != 0)
{
Prog->OverallProgress(Head().PackageCount,2*Head().PackageCount,
Head().PackageCount,
_("Building dependency tree"));
Prog->SubProgress(Head().PackageCount,_("Dependency generation"));
}
Update(Prog);
if(Prog != 0)
Prog->Done();
return true;
}
/*}}}*/
bool pkgDepCache::readStateFile(OpProgress *Prog) /*{{{*/
{
FileFd state_file;
string const state = _config->FindFile("Dir::State::extended_states");
if(RealFileExists(state)) {
state_file.Open(state, FileFd::ReadOnly);
off_t const file_size = state_file.Size();
if(Prog != NULL)
Prog->OverallProgress(0, file_size, 1,
_("Reading state information"));
pkgTagFile tagfile(&state_file);
pkgTagSection section;
off_t amt = 0;
bool const debug_autoremove = _config->FindB("Debug::pkgAutoRemove",false);
while(tagfile.Step(section)) {
string const pkgname = section.FindS("Package");
string pkgarch = section.FindS("Architecture");
if (pkgarch.empty() == true)
pkgarch = "any";
pkgCache::PkgIterator pkg = Cache->FindPkg(pkgname, pkgarch);
// Silently ignore unknown packages and packages with no actual version.
if(pkg.end() == true || pkg->VersionList == 0)
continue;
short const reason = section.FindI("Auto-Installed", 0);
if(reason > 0)
{
PkgState[pkg->ID].Flags |= Flag::Auto;
if (unlikely(debug_autoremove))
std::clog << "Auto-Installed : " << pkg.FullName() << std::endl;
if (pkgarch == "any")
{
pkgCache::GrpIterator G = pkg.Group();
for (pkg = G.NextPkg(pkg); pkg.end() != true; pkg = G.NextPkg(pkg))
if (pkg->VersionList != 0)
PkgState[pkg->ID].Flags |= Flag::Auto;
}
}
amt += section.size();
if(Prog != NULL)
Prog->OverallProgress(amt, file_size, 1,
_("Reading state information"));
}
if(Prog != NULL)
Prog->OverallProgress(file_size, file_size, 1,
_("Reading state information"));
}
return true;
}
/*}}}*/
bool pkgDepCache::writeStateFile(OpProgress *prog, bool InstalledOnly) /*{{{*/
{
bool const debug_autoremove = _config->FindB("Debug::pkgAutoRemove",false);
if(debug_autoremove)
std::clog << "pkgDepCache::writeStateFile()" << std::endl;
FileFd StateFile;
string const state = _config->FindFile("Dir::State::extended_states");
// if it does not exist, create a empty one
if(!RealFileExists(state))
{
StateFile.Open(state, FileFd::WriteAtomic);
StateFile.Close();
}
// open it
if(!StateFile.Open(state, FileFd::ReadOnly))
return _error->Error(_("Failed to open StateFile %s"),
state.c_str());
FILE *OutFile;
string const outfile = state + ".tmp";
if((OutFile = fopen(outfile.c_str(),"w")) == NULL)
return _error->Error(_("Failed to write temporary StateFile %s"),
outfile.c_str());
// first merge with the existing sections
pkgTagFile tagfile(&StateFile);
pkgTagSection section;
std::set<string> pkgs_seen;
const char *nullreorderlist[] = {0};
while(tagfile.Step(section)) {
string const pkgname = section.FindS("Package");
string pkgarch = section.FindS("Architecture");
if (pkgarch.empty() == true)
pkgarch = "native";
// Silently ignore unknown packages and packages with no actual
// version.
pkgCache::PkgIterator pkg = Cache->FindPkg(pkgname, pkgarch);
if(pkg.end() || pkg.VersionList().end())
continue;
StateCache const &P = PkgState[pkg->ID];
bool newAuto = (P.Flags & Flag::Auto);
// skip not installed or now-removed ones if requested
if (InstalledOnly && (
(pkg->CurrentVer == 0 && P.Mode != ModeInstall) ||
(pkg->CurrentVer != 0 && P.Mode == ModeDelete)))
{
// The section is obsolete if it contains no other tag
unsigned int const count = section.Count();
if (count < 2 ||
(count == 2 && section.Exists("Auto-Installed")) ||
(count == 3 && section.Exists("Auto-Installed") && section.Exists("Architecture")))
continue;
else
newAuto = false;
}
if(_config->FindB("Debug::pkgAutoRemove",false))
std::clog << "Update existing AutoInstall info: "
<< pkg.FullName() << std::endl;
TFRewriteData rewrite[3];
rewrite[0].Tag = "Architecture";
rewrite[0].Rewrite = pkg.Arch();
rewrite[0].NewTag = 0;
rewrite[1].Tag = "Auto-Installed";
rewrite[1].Rewrite = newAuto ? "1" : "0";
rewrite[1].NewTag = 0;
rewrite[2].Tag = 0;
TFRewrite(OutFile, section, nullreorderlist, rewrite);
fprintf(OutFile,"\n");
pkgs_seen.insert(pkg.FullName());
}
// then write the ones we have not seen yet
std::ostringstream ostr;
for(pkgCache::PkgIterator pkg=Cache->PkgBegin(); !pkg.end(); ++pkg) {
StateCache const &P = PkgState[pkg->ID];
if(P.Flags & Flag::Auto) {
if (pkgs_seen.find(pkg.FullName()) != pkgs_seen.end()) {
if(debug_autoremove)
std::clog << "Skipping already written " << pkg.FullName() << std::endl;
continue;
}
// skip not installed ones if requested
if (InstalledOnly && (
(pkg->CurrentVer == 0 && P.Mode != ModeInstall) ||
(pkg->CurrentVer != 0 && P.Mode == ModeDelete)))
continue;
const char* const pkgarch = pkg.Arch();
if (strcmp(pkgarch, "all") == 0)
continue;
if(debug_autoremove)
std::clog << "Writing new AutoInstall: " << pkg.FullName() << std::endl;
ostr.str(string(""));
ostr << "Package: " << pkg.Name()
<< "\nArchitecture: " << pkgarch
<< "\nAuto-Installed: 1\n\n";
fprintf(OutFile,"%s",ostr.str().c_str());
}
}
fclose(OutFile);
// move the outfile over the real file and set permissions
rename(outfile.c_str(), state.c_str());
chmod(state.c_str(), 0644);
return true;
}
/*}}}*/
// DepCache::CheckDep - Checks a single dependency /*{{{*/
// ---------------------------------------------------------------------
/* This first checks the dependency against the main target package and
then walks along the package provides list and checks if each provides
will be installed then checks the provides against the dep. Res will be
set to the package which was used to satisfy the dep. */
bool pkgDepCache::CheckDep(DepIterator Dep,int Type,PkgIterator &Res)
{
Res = Dep.TargetPkg();
/* Check simple depends. A depends -should- never self match but
we allow it anyhow because dpkg does. Technically it is a packaging
bug. Conflicts may never self match */
if (Dep.TargetPkg() != Dep.ParentPkg() || Dep.IsNegative() == false)
{
PkgIterator Pkg = Dep.TargetPkg();
// Check the base package
if (Type == NowVersion && Pkg->CurrentVer != 0)
if (VS().CheckDep(Pkg.CurrentVer().VerStr(),Dep->CompareOp,
Dep.TargetVer()) == true)
return true;
if (Type == InstallVersion && PkgState[Pkg->ID].InstallVer != 0)
if (VS().CheckDep(PkgState[Pkg->ID].InstVerIter(*this).VerStr(),
Dep->CompareOp,Dep.TargetVer()) == true)
return true;
if (Type == CandidateVersion && PkgState[Pkg->ID].CandidateVer != 0)
if (VS().CheckDep(PkgState[Pkg->ID].CandidateVerIter(*this).VerStr(),
Dep->CompareOp,Dep.TargetVer()) == true)
return true;
}
if (Dep->Type == Dep::Obsoletes)
return false;
// Check the providing packages
PrvIterator P = Dep.TargetPkg().ProvidesList();
for (; P.end() != true; ++P)
{
if (Dep.IsIgnorable(P) == true)
continue;
// Check if the provides is a hit
if (Type == NowVersion)
{
if (P.OwnerPkg().CurrentVer() != P.OwnerVer())
continue;
}
if (Type == InstallVersion)
{
StateCache &State = PkgState[P.OwnerPkg()->ID];
if (State.InstallVer != (Version *)P.OwnerVer())
continue;
}
if (Type == CandidateVersion)
{
StateCache &State = PkgState[P.OwnerPkg()->ID];
if (State.CandidateVer != (Version *)P.OwnerVer())
continue;
}
// Compare the versions.
if (VS().CheckDep(P.ProvideVersion(),Dep->CompareOp,Dep.TargetVer()) == true)
{
Res = P.OwnerPkg();
return true;
}
}
return false;
}
/*}}}*/
// DepCache::AddSizes - Add the packages sizes to the counters /*{{{*/
// ---------------------------------------------------------------------
/* Call with Inverse = true to preform the inverse opration */
void pkgDepCache::AddSizes(const PkgIterator &Pkg, bool const Inverse)
{
StateCache &P = PkgState[Pkg->ID];
if (Pkg->VersionList == 0)
return;
if (Pkg.State() == pkgCache::PkgIterator::NeedsConfigure &&
P.Keep() == true)
return;
// Compute the size data
if (P.NewInstall() == true)
{
if (Inverse == false) {
iUsrSize += P.InstVerIter(*this)->InstalledSize;
iDownloadSize += P.InstVerIter(*this)->Size;
} else {
iUsrSize -= P.InstVerIter(*this)->InstalledSize;
iDownloadSize -= P.InstVerIter(*this)->Size;
}
return;
}
// Upgrading
if (Pkg->CurrentVer != 0 &&
(P.InstallVer != (Version *)Pkg.CurrentVer() ||
(P.iFlags & ReInstall) == ReInstall) && P.InstallVer != 0)
{
if (Inverse == false) {
iUsrSize -= Pkg.CurrentVer()->InstalledSize;
iUsrSize += P.InstVerIter(*this)->InstalledSize;
iDownloadSize += P.InstVerIter(*this)->Size;
} else {
iUsrSize -= P.InstVerIter(*this)->InstalledSize;
iUsrSize += Pkg.CurrentVer()->InstalledSize;
iDownloadSize -= P.InstVerIter(*this)->Size;
}
return;
}
// Reinstall
if (Pkg.State() == pkgCache::PkgIterator::NeedsUnpack &&
P.Delete() == false)
{
if (Inverse == false)
iDownloadSize += P.InstVerIter(*this)->Size;
else
iDownloadSize -= P.InstVerIter(*this)->Size;
return;
}
// Removing
if (Pkg->CurrentVer != 0 && P.InstallVer == 0)
{
if (Inverse == false)
iUsrSize -= Pkg.CurrentVer()->InstalledSize;
else
iUsrSize += Pkg.CurrentVer()->InstalledSize;
return;
}
}
/*}}}*/
// DepCache::AddStates - Add the package to the state counter /*{{{*/
// ---------------------------------------------------------------------
/* This routine is tricky to use, you must make sure that it is never
called twice for the same package. This means the Remove/Add section
should be as short as possible and not encompass any code that will
calld Remove/Add itself. Remember, dependencies can be circular so
while processing a dep for Pkg it is possible that Add/Remove
will be called on Pkg */
void pkgDepCache::AddStates(const PkgIterator &Pkg, bool const Invert)
{
signed char const Add = (Invert == false) ? 1 : -1;
StateCache &State = PkgState[Pkg->ID];
// The Package is broken (either minimal dep or policy dep)
if ((State.DepState & DepInstMin) != DepInstMin)
iBrokenCount += Add;
if ((State.DepState & DepInstPolicy) != DepInstPolicy)
iPolicyBrokenCount += Add;
// Bad state
if (Pkg.State() != PkgIterator::NeedsNothing)
iBadCount += Add;
// Not installed
if (Pkg->CurrentVer == 0)
{
if (State.Mode == ModeDelete &&
(State.iFlags & Purge) == Purge && Pkg.Purge() == false)
iDelCount += Add;
if (State.Mode == ModeInstall)
iInstCount += Add;
return;
}
// Installed, no upgrade
if (State.Status == 0)
{
if (State.Mode == ModeDelete)
iDelCount += Add;
else
if ((State.iFlags & ReInstall) == ReInstall)
iInstCount += Add;
return;
}
// Alll 3 are possible
if (State.Mode == ModeDelete)
iDelCount += Add;
if (State.Mode == ModeKeep)
iKeepCount += Add;
if (State.Mode == ModeInstall)
iInstCount += Add;
}
/*}}}*/
// DepCache::BuildGroupOrs - Generate the Or group dep data /*{{{*/
// ---------------------------------------------------------------------
/* The or group results are stored in the last item of the or group. This
allows easy detection of the state of a whole or'd group. */
void pkgDepCache::BuildGroupOrs(VerIterator const &V)
{
unsigned char Group = 0;
for (DepIterator D = V.DependsList(); D.end() != true; ++D)
{
// Build the dependency state.
unsigned char &State = DepState[D->ID];
/* Invert for Conflicts. We have to do this twice to get the
right sense for a conflicts group */
if (D.IsNegative() == true)
State = ~State;
// Add to the group if we are within an or..
State &= 0x7;
Group |= State;
State |= Group << 3;
if ((D->CompareOp & Dep::Or) != Dep::Or)
Group = 0;
// Invert for Conflicts
if (D.IsNegative() == true)
State = ~State;
}
}
/*}}}*/
// DepCache::VersionState - Perform a pass over a dependency list /*{{{*/
// ---------------------------------------------------------------------
/* This is used to run over a dependency list and determine the dep
state of the list, filtering it through both a Min check and a Policy
check. The return result will have SetMin/SetPolicy low if a check
fails. It uses the DepState cache for it's computations. */
unsigned char pkgDepCache::VersionState(DepIterator D,unsigned char Check,
unsigned char SetMin,
unsigned char SetPolicy)
{
unsigned char Dep = 0xFF;
while (D.end() != true)
{
// Compute a single dependency element (glob or)
DepIterator Start = D;
unsigned char State = 0;
for (bool LastOR = true; D.end() == false && LastOR == true; ++D)
{
State |= DepState[D->ID];
LastOR = (D->CompareOp & Dep::Or) == Dep::Or;
}
// Minimum deps that must be satisfied to have a working package
if (Start.IsCritical() == true)
if ((State & Check) != Check)
Dep &= ~SetMin;
// Policy deps that must be satisfied to install the package
if (IsImportantDep(Start) == true &&
(State & Check) != Check)
Dep &= ~SetPolicy;
}
return Dep;
}
/*}}}*/
// DepCache::DependencyState - Compute the 3 results for a dep /*{{{*/
// ---------------------------------------------------------------------
/* This is the main dependency computation bit. It computes the 3 main
results for a dependencys, Now, Install and Candidate. Callers must
invert the result if dealing with conflicts. */
unsigned char pkgDepCache::DependencyState(DepIterator &D)
{
unsigned char State = 0;
if (CheckDep(D,NowVersion) == true)
State |= DepNow;
if (CheckDep(D,InstallVersion) == true)
State |= DepInstall;
if (CheckDep(D,CandidateVersion) == true)
State |= DepCVer;
return State;
}
/*}}}*/
// DepCache::UpdateVerState - Compute the Dep member of the state /*{{{*/
// ---------------------------------------------------------------------
/* This determines the combined dependency representation of a package
for its two states now and install. This is done by using the pre-generated
dependency information. */
void pkgDepCache::UpdateVerState(PkgIterator Pkg)
{
// Empty deps are always true
StateCache &State = PkgState[Pkg->ID];
State.DepState = 0xFF;
// Check the Current state
if (Pkg->CurrentVer != 0)
{
DepIterator D = Pkg.CurrentVer().DependsList();
State.DepState &= VersionState(D,DepNow,DepNowMin,DepNowPolicy);
}
/* Check the candidate state. We do not compare against the whole as
a candidate state but check the candidate version against the
install states */
if (State.CandidateVer != 0)
{
DepIterator D = State.CandidateVerIter(*this).DependsList();
State.DepState &= VersionState(D,DepInstall,DepCandMin,DepCandPolicy);
}
// Check target state which can only be current or installed
if (State.InstallVer != 0)
{
DepIterator D = State.InstVerIter(*this).DependsList();
State.DepState &= VersionState(D,DepInstall,DepInstMin,DepInstPolicy);
}
}
/*}}}*/
// DepCache::Update - Figure out all the state information /*{{{*/
// ---------------------------------------------------------------------
/* This will figure out the state of all the packages and all the
dependencies based on the current policy. */
void pkgDepCache::Update(OpProgress *Prog)
{
iUsrSize = 0;
iDownloadSize = 0;
iDelCount = 0;
iInstCount = 0;
iKeepCount = 0;
iBrokenCount = 0;
iBadCount = 0;
// Perform the depends pass
int Done = 0;
for (PkgIterator I = PkgBegin(); I.end() != true; ++I, ++Done)
{
if (Prog != 0 && Done%20 == 0)
Prog->Progress(Done);
for (VerIterator V = I.VersionList(); V.end() != true; ++V)
{
unsigned char Group = 0;
for (DepIterator D = V.DependsList(); D.end() != true; ++D)
{
// Build the dependency state.
unsigned char &State = DepState[D->ID];
State = DependencyState(D);
// Add to the group if we are within an or..
Group |= State;
State |= Group << 3;
if ((D->CompareOp & Dep::Or) != Dep::Or)
Group = 0;
// Invert for Conflicts
if (D.IsNegative() == true)
State = ~State;
}
}
// Compute the package dependency state and size additions
AddSizes(I);
UpdateVerState(I);
AddStates(I);
}
if (Prog != 0)
Prog->Progress(Done);
readStateFile(Prog);
}
/*}}}*/
// DepCache::Update - Update the deps list of a package /*{{{*/
// ---------------------------------------------------------------------
/* This is a helper for update that only does the dep portion of the scan.
It is mainly meant to scan reverse dependencies. */
void pkgDepCache::Update(DepIterator D)
{
// Update the reverse deps
for (;D.end() != true; ++D)
{
unsigned char &State = DepState[D->ID];
State = DependencyState(D);
// Invert for Conflicts
if (D.IsNegative() == true)
State = ~State;
RemoveStates(D.ParentPkg());
BuildGroupOrs(D.ParentVer());
UpdateVerState(D.ParentPkg());
AddStates(D.ParentPkg());
}
}
/*}}}*/
// DepCache::Update - Update the related deps of a package /*{{{*/
// ---------------------------------------------------------------------
/* This is called whenever the state of a package changes. It updates
all cached dependencies related to this package. */
void pkgDepCache::Update(PkgIterator const &Pkg)
{
// Recompute the dep of the package
RemoveStates(Pkg);
UpdateVerState(Pkg);
AddStates(Pkg);
// Update the reverse deps
Update(Pkg.RevDependsList());
// Update the provides map for the current ver
if (Pkg->CurrentVer != 0)
for (PrvIterator P = Pkg.CurrentVer().ProvidesList();
P.end() != true; ++P)
Update(P.ParentPkg().RevDependsList());
// Update the provides map for the candidate ver
if (PkgState[Pkg->ID].CandidateVer != 0)
for (PrvIterator P = PkgState[Pkg->ID].CandidateVerIter(*this).ProvidesList();
P.end() != true; ++P)
Update(P.ParentPkg().RevDependsList());
}
/*}}}*/
// DepCache::MarkKeep - Put the package in the keep state /*{{{*/
// ---------------------------------------------------------------------
/* */
bool pkgDepCache::MarkKeep(PkgIterator const &Pkg, bool Soft, bool FromUser,
unsigned long Depth)
{
if (IsModeChangeOk(ModeKeep, Pkg, Depth, FromUser) == false)
return false;
/* Reject an attempt to keep a non-source broken installed package, those
must be upgraded */
if (Pkg.State() == PkgIterator::NeedsUnpack &&
Pkg.CurrentVer().Downloadable() == false)
return false;
/* We changed the soft state all the time so the UI is a bit nicer
to use */
StateCache &P = PkgState[Pkg->ID];
// Check that it is not already kept
if (P.Mode == ModeKeep)
return true;
if (Soft == true)
P.iFlags |= AutoKept;
else
P.iFlags &= ~AutoKept;
ActionGroup group(*this);
#if 0 // reseting the autoflag here means we lose the
// auto-mark information if a user selects a package for removal
// but changes his mind then and sets it for keep again
// - this makes sense as default when all Garbage dependencies
// are automatically marked for removal (as aptitude does).
// setting a package for keep then makes it no longer autoinstalled
// for all other use-case this action is rather suprising
if(FromUser && !P.Marked)
P.Flags &= ~Flag::Auto;
#endif
if (DebugMarker == true)
std::clog << OutputInDepth(Depth) << "MarkKeep " << Pkg << " FU=" << FromUser << std::endl;
RemoveSizes(Pkg);
RemoveStates(Pkg);
P.Mode = ModeKeep;
if (Pkg->CurrentVer == 0)
P.InstallVer = 0;
else
P.InstallVer = Pkg.CurrentVer();
AddStates(Pkg);
Update(Pkg);
AddSizes(Pkg);
return true;
}
/*}}}*/
// DepCache::MarkDelete - Put the package in the delete state /*{{{*/
// ---------------------------------------------------------------------
/* */
bool pkgDepCache::MarkDelete(PkgIterator const &Pkg, bool rPurge,
unsigned long Depth, bool FromUser)
{
if (IsModeChangeOk(ModeDelete, Pkg, Depth, FromUser) == false)
return false;
StateCache &P = PkgState[Pkg->ID];
// Check that it is not already marked for delete
if ((P.Mode == ModeDelete || P.InstallVer == 0) &&
(Pkg.Purge() == true || rPurge == false))
return true;
// check if we are allowed to remove the package
if (IsDeleteOk(Pkg,rPurge,Depth,FromUser) == false)
return false;
P.iFlags &= ~(AutoKept | Purge);
if (rPurge == true)
P.iFlags |= Purge;
ActionGroup group(*this);
if (DebugMarker == true)
std::clog << OutputInDepth(Depth) << (rPurge ? "MarkPurge " : "MarkDelete ") << Pkg << " FU=" << FromUser << std::endl;
RemoveSizes(Pkg);
RemoveStates(Pkg);
if (Pkg->CurrentVer == 0 && (Pkg.Purge() == true || rPurge == false))
P.Mode = ModeKeep;
else
P.Mode = ModeDelete;
P.InstallVer = 0;
AddStates(Pkg);
Update(Pkg);
AddSizes(Pkg);
return true;
}
/*}}}*/
// DepCache::IsDeleteOk - check if it is ok to remove this package /*{{{*/
// ---------------------------------------------------------------------
/* The default implementation tries to prevent deletion of install requests.
dpkg holds are enforced by the private IsModeChangeOk */
bool pkgDepCache::IsDeleteOk(PkgIterator const &Pkg,bool rPurge,
unsigned long Depth, bool FromUser)
{
if (FromUser == false && Pkg->CurrentVer == 0)
{
StateCache &P = PkgState[Pkg->ID];
if (P.InstallVer != 0 && P.Status == 2 && (P.Flags & Flag::Auto) != Flag::Auto)
{
if (DebugMarker == true)
std::clog << OutputInDepth(Depth) << "Manual install request prevents MarkDelete of " << Pkg << std::endl;
return false;
}
}
return true;
}
/*}}}*/
// DepCache::IsModeChangeOk - check if it is ok to change the mode /*{{{*/
// ---------------------------------------------------------------------
/* this is used by all Mark methods on the very first line to check sanity
and prevents mode changes for packages on hold for example.
If you want to check Mode specific stuff you can use the virtual public
Is<Mode>Ok methods instead */
char const* PrintMode(char const mode)
{
switch (mode)
{
case pkgDepCache::ModeInstall: return "Install";
case pkgDepCache::ModeKeep: return "Keep";
case pkgDepCache::ModeDelete: return "Delete";
default: return "UNKNOWN";
}
}
bool pkgDepCache::IsModeChangeOk(ModeList const mode, PkgIterator const &Pkg,
unsigned long const Depth, bool const FromUser)
{
// we are not trying to hard…
if (unlikely(Depth > 100))
return false;
// general sanity
if (unlikely(Pkg.end() == true || Pkg->VersionList == 0))
return false;
// the user is always right
if (FromUser == true)
return true;
StateCache &P = PkgState[Pkg->ID];
// if previous state was set by user only user can reset it
if ((P.iFlags & Protected) == Protected)
{
if (unlikely(DebugMarker == true) && P.Mode != mode)
std::clog << OutputInDepth(Depth) << "Ignore Mark" << PrintMode(mode)
<< " of " << Pkg << " as its mode (" << PrintMode(P.Mode)
<< ") is protected" << std::endl;
return false;
}
// enforce dpkg holds
else if (mode != ModeKeep && Pkg->SelectedState == pkgCache::State::Hold &&
_config->FindB("APT::Ignore-Hold",false) == false)
{
if (unlikely(DebugMarker == true) && P.Mode != mode)
std::clog << OutputInDepth(Depth) << "Hold prevents Mark" << PrintMode(mode)
<< " of " << Pkg << std::endl;
return false;
}
return true;
}
/*}}}*/
// DepCache::MarkInstall - Put the package in the install state /*{{{*/
// ---------------------------------------------------------------------
/* */
struct CompareProviders {
pkgCache::PkgIterator const Pkg;
CompareProviders(pkgCache::DepIterator const &Dep) : Pkg(Dep.TargetPkg()) {};
//bool operator() (APT::VersionList::iterator const &AV, APT::VersionList::iterator const &BV)
bool operator() (pkgCache::VerIterator const &AV, pkgCache::VerIterator const &BV)
{
pkgCache::PkgIterator const A = AV.ParentPkg();
pkgCache::PkgIterator const B = BV.ParentPkg();
// Prefer packages in the same group as the target; e.g. foo:i386, foo:amd64
if (A->Group != B->Group)
{
if (A->Group == Pkg->Group && B->Group != Pkg->Group)
return false;
else if (B->Group == Pkg->Group && A->Group != Pkg->Group)
return true;
}
// we like essentials
if ((A->Flags & pkgCache::Flag::Essential) != (B->Flags & pkgCache::Flag::Essential))
{
if ((A->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential)
return false;
else if ((B->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential)
return true;
}
if ((A->Flags & pkgCache::Flag::Important) != (B->Flags & pkgCache::Flag::Important))
{
if ((A->Flags & pkgCache::Flag::Important) == pkgCache::Flag::Important)
return false;
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)
{
if (strcmp(A.Arch(), A.Cache()->NativeArch()) == 0)
return false;
else if (strcmp(B.Arch(), B.Cache()->NativeArch()) == 0)
return true;
std::vector<std::string> archs = APT::Configuration::getArchitectures();
for (std::vector<std::string>::const_iterator a = archs.begin(); a != archs.end(); ++a)
if (*a == A.Arch())
return false;
else if (*a == B.Arch())
return true;
}
// unable to decide…
return A->ID < B->ID;
}
};
bool pkgDepCache::MarkInstall(PkgIterator const &Pkg,bool AutoInst,
unsigned long Depth, bool FromUser,
bool ForceImportantDeps)
{
if (IsModeChangeOk(ModeInstall, Pkg, Depth, FromUser) == false)
return false;