algorithms.h
// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
/* ######################################################################
Algorithms - A set of misc algorithms
This simulate class displays what the ordering code has done and
analyses it with a fresh new dependency cache. In this way we can
see all of the effects of an upgrade run.
pkgDistUpgrade computes an upgrade that causes as many packages as
possible to move to the newest version.
pkgApplyStatus sets the target state based on the content of the status
field in the status file. It is important to get proper crash recovery.
pkgFixBroken corrects a broken system so that it is in a sane state.
pkgAllUpgrade attempts to upgrade as many packages as possible but
without installing new packages.
The problem resolver class contains a number of complex algorithms
to try to best-guess an upgrade state. It solves the problem of
maximizing the number of install state packages while having no broken
packages.
##################################################################### */
/*}}}*/
#ifndef PKGLIB_ALGORITHMS_H
#define PKGLIB_ALGORITHMS_H
#include <apt-pkg/cachefilter.h>
#include <apt-pkg/depcache.h>
#include <apt-pkg/packagemanager.h>
#include <apt-pkg/pkgcache.h>
#include <iostream>
#include <memory>
#include <string>
#include <apt-pkg/macros.h>
class pkgSimulatePrivate;
class APT_PUBLIC pkgSimulate : public pkgPackageManager /*{{{*/
{
std::unique_ptr<pkgSimulatePrivate> const d;
protected:
class APT_PUBLIC Policy : public pkgDepCache::Policy
{
pkgDepCache *Cache;
public:
VerIterator GetCandidateVer(PkgIterator const &Pkg) override
{
return (*Cache)[Pkg].CandidateVerIter(*Cache);
}
explicit Policy(pkgDepCache *Cache) : Cache(Cache) {};
};
std::unique_ptr<unsigned char[]> Flags;
Policy iPolicy;
pkgDepCache Sim;
pkgDepCache::ActionGroup group;
// The Actual installation implementation
bool Install(PkgIterator Pkg, std::string File) override;
bool Configure(PkgIterator Pkg) override;
bool Remove(PkgIterator Pkg, bool Purge) override;
public:
bool Go(APT::Progress::PackageManager * progress) override;
private:
APT_HIDDEN void ShortBreaks();
APT_HIDDEN void Describe(PkgIterator iPkg,std::ostream &out,bool Current,bool Candidate);
APT_HIDDEN bool RealInstall(PkgIterator Pkg,std::string File);
APT_HIDDEN bool RealConfigure(PkgIterator Pkg);
APT_HIDDEN bool RealRemove(PkgIterator Pkg,bool Purge);
public:
explicit pkgSimulate(pkgDepCache *Cache);
virtual ~pkgSimulate();
};
/*}}}*/
class APT_PUBLIC pkgProblemResolver /*{{{*/
{
private:
void * const d;
pkgDepCache &Cache;
typedef pkgCache::PkgIterator PkgIterator;
typedef pkgCache::VerIterator VerIterator;
typedef pkgCache::DepIterator DepIterator;
typedef pkgCache::PrvIterator PrvIterator;
typedef pkgCache::Version Version;
typedef pkgCache::Package Package;
enum Flags
{
Protected = (1 << 0),
PreInstalled = (1 << 1),
Upgradable = (1 << 2),
ReInstateTried = (1 << 3),
ToRemove = (1 << 4),
BrokenPolicyAllowed = (1 << 5)
};
std::unique_ptr<int[]> Scores;
std::unique_ptr<unsigned char[]> Flags;
bool Debug;
// Sort stuff
APT_HIDDEN int ScoreSort(Package const *A, Package const *B) APT_PURE;
struct APT_PUBLIC PackageKill
{
PkgIterator Pkg;
DepIterator Dep;
};
APT_HIDDEN void MakeScores();
APT_HIDDEN bool DoUpgrade(pkgCache::PkgIterator Pkg);
protected:
bool InstOrNewPolicyBroken(pkgCache::PkgIterator Pkg);
public:
inline void Protect(pkgCache::PkgIterator Pkg) {Flags[Pkg->ID] |= Protected; Cache.MarkProtected(Pkg);};
inline void Remove(pkgCache::PkgIterator Pkg) {Flags[Pkg->ID] |= ToRemove;};
inline void Clear(pkgCache::PkgIterator Pkg) { Flags[Pkg->ID] &= ~(Protected | ToRemove | BrokenPolicyAllowed); };
#ifdef APT_COMPILING_APT
inline void AllowBrokenPolicy(pkgCache::PkgIterator Pkg) { Flags[Pkg->ID] |= BrokenPolicyAllowed; };
#endif
bool KeepPhasedUpdates();
// Try to intelligently resolve problems by installing and removing packages
bool Resolve(bool BrokenFix = false, OpProgress * const Progress = NULL);
APT_HIDDEN bool ResolveInternal(bool const BrokenFix = false);
// Try to resolve problems only by using keep
bool ResolveByKeep(OpProgress * const Progress = NULL);
APT_HIDDEN bool ResolveByKeepInternal();
explicit pkgProblemResolver(pkgDepCache *Cache);
virtual ~pkgProblemResolver();
};
/*}}}*/
APT_PUBLIC bool pkgApplyStatus(pkgDepCache &Cache);
APT_PUBLIC bool pkgFixBroken(pkgDepCache &Cache);
APT_PUBLIC void pkgPrioSortList(pkgCache &Cache,pkgCache::Version **List);
namespace APT
{
namespace KernelAutoRemoveHelper
{
// Public for linking to apt-private, but no A{P,B}I guarantee.
APT_PUBLIC std::unique_ptr<APT::CacheFilter::Matcher> GetProtectedKernelsFilter(pkgCache *cache, bool returnRemove = false);
std::string GetProtectedKernelsRegex(pkgCache *cache, bool ReturnRemove = false);
std::string getUname(std::string const &packageName);
} // namespace KernelAutoRemoveHelper
} // namespace APT
#endif
cachefilter.h
APT::Progress::PackageManager
Definition install-progress.h:18
OpProgress
Definition progress.h:30
pkgCache::DepIterator
Definition cacheiterators.h:337
pkgCache::PkgIterator
Definition cacheiterators.h:147
pkgCache::PrvIterator
Definition cacheiterators.h:423
pkgCache::VerIterator
Definition cacheiterators.h:218
pkgCache
Definition pkgcache.h:126
pkgDepCache::ActionGroup
Represents an active action group.
Definition depcache.h:142
pkgDepCache::Policy
Definition depcache.h:250
pkgDepCache
Definition depcache.h:63
pkgProblemResolver::ResolveInternal
APT_HIDDEN bool ResolveInternal(bool const BrokenFix=false)
Definition algorithms.cc:755
pkgSimulatePrivate
Definition algorithms.cc:49
pkgSimulate::Policy
Definition algorithms.h:53
pkgcache.h
pkgCache - Structure definitions for the cache file
pkgCache::Package
contains information for a single unique package
Definition pkgcache.h:460
pkgCache::Version
information for a single version of a package
Definition pkgcache.h:652