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Diffstat (limited to 'apt-pkg/algorithms.h')
| -rw-r--r-- | apt-pkg/algorithms.h | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/apt-pkg/algorithms.h b/apt-pkg/algorithms.h new file mode 100644 index 0000000..12a77d4 --- /dev/null +++ b/apt-pkg/algorithms.h @@ -0,0 +1,164 @@ +// -*- 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 /*{{{*/ +{ + pkgSimulatePrivate * const d; + protected: + + class APT_PUBLIC Policy : public pkgDepCache::Policy + { + pkgDepCache *Cache; + public: + + virtual VerIterator GetCandidateVer(PkgIterator const &Pkg) APT_OVERRIDE + { + return (*Cache)[Pkg].CandidateVerIter(*Cache); + } + + explicit Policy(pkgDepCache *Cache) : Cache(Cache) {}; + }; + + unsigned char *Flags; + + Policy iPolicy; + pkgDepCache Sim; + pkgDepCache::ActionGroup group; + + // The Actual installation implementation + virtual bool Install(PkgIterator Pkg,std::string File) APT_OVERRIDE; + virtual bool Configure(PkgIterator Pkg) APT_OVERRIDE; + virtual bool Remove(PkgIterator Pkg,bool Purge) APT_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: + /** \brief dpointer placeholder (for later in case we need it) */ + 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)}; + int *Scores; + 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);}; + + // 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 |