X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/4ef9a929f1cb74f08f764b321cbea62cbfe025a2..cc0a4c82b3c132abba9b9ec35fd61bc8b45a1b80:/apt-pkg/depcache.h diff --git a/apt-pkg/depcache.h b/apt-pkg/depcache.h index 042abb5cc..03a2cb0a8 100644 --- a/apt-pkg/depcache.h +++ b/apt-pkg/depcache.h @@ -1,6 +1,5 @@ -// -*- mode: cpp; mode: fold -*- +// -*- mode: c++; mode: fold -*- // Description /*{{{*/ -// $Id: depcache.h,v 1.14 2001/02/20 07:03:17 jgg Exp $ /* ###################################################################### DepCache - Dependency Extension data for the cache @@ -15,7 +14,7 @@ This structure is important to support the readonly status of the cache file. When the data is saved the cache will be refereshed from our - internal rep and written to disk. Then the actual persistant data + internal rep and written to disk. Then the actual persistent data files will be put on the disk. Each dependency is compared against 3 target versions to produce to @@ -38,16 +37,91 @@ #ifndef PKGLIB_DEPCACHE_H #define PKGLIB_DEPCACHE_H -#ifdef __GNUG__ -#pragma interface "apt-pkg/depcache.h" -#endif - +#include #include +#include +#include + +#include + +#include +#include +#include +#include + +#ifndef APT_8_CLEANER_HEADERS #include +#include +#endif +#ifndef APT_10_CLEANER_HEADERS +#include +#include +#endif + +class OpProgress; +class pkgVersioningSystem; class pkgDepCache : protected pkgCache::Namespace { public: + + /** \brief An arbitrary predicate on packages. */ + class InRootSetFunc + { + public: + virtual bool InRootSet(const pkgCache::PkgIterator &/*pkg*/) {return false;}; + virtual ~InRootSetFunc() {}; + }; + + private: + /** \brief Mark a single package and all its unmarked important + * dependencies during mark-and-sweep. + * + * Recursively invokes itself to mark all dependencies of the + * package. + * + * \param pkg The package to mark. + * + * \param ver The version of the package that is to be marked. + * + * \param follow_recommends If \b true, recommendations of the + * package will be recursively marked. + * + * \param follow_suggests If \b true, suggestions of the package + * will be recursively marked. + */ + APT_HIDDEN void MarkPackage(const pkgCache::PkgIterator &pkg, + const pkgCache::VerIterator &ver, + bool const &follow_recommends, + bool const &follow_suggests); + + /** \brief Update the Marked field of all packages. + * + * Each package's StateCache::Marked field will be set to \b true + * if and only if it can be reached from the root set. By + * default, the root set consists of the set of manually installed + * or essential packages, but it can be extended using the + * parameter #rootFunc. + * + * \param rootFunc A callback that can be used to add extra + * packages to the root set. + * + * \return \b false if an error occurred. + */ + bool MarkRequired(InRootSetFunc &rootFunc); + + /** \brief Set the StateCache::Garbage flag on all packages that + * should be removed. + * + * Packages that were not marked by the last call to #MarkRequired + * are tested to see whether they are actually garbage. If so, + * they are marked as such. + * + * \return \b false if an error occurred. + */ + bool Sweep(); + + public: // These flags are used in DepState enum DepFlags {DepNow = (1 << 0),DepInstall = (1 << 1),DepCVer = (1 << 2), @@ -59,13 +133,83 @@ class pkgDepCache : protected pkgCache::Namespace DepCandPolicy = (1 << 4), DepCandMin = (1 << 5)}; // These flags are used in StateCache::iFlags - enum InternalFlags {AutoKept = (1 << 0), Purge = (1 << 1), ReInstall = (1 << 2)}; + enum InternalFlags {AutoKept = (1 << 0), Purge = (1 << 1), ReInstall = (1 << 2), Protected = (1 << 3)}; enum VersionTypes {NowVersion, InstallVersion, CandidateVersion}; - enum ModeList {ModeDelete = 0, ModeKeep = 1, ModeInstall = 2}; + enum ModeList {ModeDelete = 0, ModeKeep = 1, ModeInstall = 2, ModeGarbage = 3}; + + /** \brief Represents an active action group. + * + * An action group is a group of actions that are currently being + * performed. While an active group is active, certain routine + * clean-up actions that would normally be performed after every + * cache operation are delayed until the action group is + * completed. This is necessary primarily to avoid inefficiencies + * when modifying a large number of packages at once. + * + * This class represents an active action group. Creating an + * instance will create an action group; destroying one will + * destroy the corresponding action group. + * + * The following operations are suppressed by this class: + * + * - Keeping the Marked and Garbage flags up to date. + * + * \note This can be used in the future to easily accumulate + * atomic actions for undo or to display "what apt did anyway"; + * e.g., change the counter of how many action groups are active + * to a std::set of pointers to them and use those to store + * information about what happened in a group in the group. + */ + class ActionGroup + { + void * const d; + pkgDepCache &cache; + + bool released; + + /** Action groups are noncopyable. */ + APT_HIDDEN ActionGroup(const ActionGroup &other); + public: + /** \brief Create a new ActionGroup. + * + * \param cache The cache that this ActionGroup should + * manipulate. + * + * As long as this object exists, no automatic cleanup + * operations will be undertaken. + */ + explicit ActionGroup(pkgDepCache &cache); + + /** \brief Clean up the action group before it is destroyed. + * + * If it is destroyed later, no second cleanup wil be run. + */ + void release(); + + /** \brief Destroy the action group. + * + * If this is the last action group, the automatic cache + * cleanup operations will be undertaken. + */ + virtual ~ActionGroup(); + }; + + /** \brief Returns \b true for packages matching a regular + * expression in APT::NeverAutoRemove. + */ + class DefaultRootSetFunc : public InRootSetFunc, public Configuration::MatchAgainstConfig + { + public: + DefaultRootSetFunc() : Configuration::MatchAgainstConfig("APT::NeverAutoRemove") {}; + virtual ~DefaultRootSetFunc() {}; + + bool InRootSet(const pkgCache::PkgIterator &pkg) APT_OVERRIDE { return pkg.end() == false && Match(pkg.Name()); }; + }; + struct StateCache { - // Epoch stripped text versions of the two version fields + // text versions of the two version fields const char *CandVersion; const char *CurVersion; @@ -79,21 +223,34 @@ class pkgDepCache : protected pkgCache::Namespace unsigned short Flags; unsigned short iFlags; // Internal flags + /** \brief \b true if this package can be reached from the root set. */ + bool Marked; + + /** \brief \b true if this package is unused and should be removed. + * + * This differs from !#Marked, because it is possible that some + * unreachable packages will be protected from becoming + * garbage. + */ + bool Garbage; + // Various tree indicators signed char Status; // -1,0,1,2 unsigned char Mode; // ModeList unsigned char DepState; // DepState Flags // Update of candidate version - const char *StripEpoch(const char *Ver); + APT_DEPRECATED_MSG("Use the method of the same name in contrib/strutl.h instead if you must") const char *StripEpoch(const char *Ver) APT_PURE; void Update(PkgIterator Pkg,pkgCache &Cache); // Various test members for the current status of the package inline bool NewInstall() const {return Status == 2 && Mode == ModeInstall;}; inline bool Delete() const {return Mode == ModeDelete;}; + inline bool Purge() const {return Delete() == true && (iFlags & pkgDepCache::Purge) == pkgDepCache::Purge; }; inline bool Keep() const {return Mode == ModeKeep;}; + inline bool Protect() const {return (iFlags & Protected) == Protected;}; inline bool Upgrade() const {return Status > 0 && Mode == ModeInstall;}; - inline bool Upgradable() const {return Status >= 1;}; + inline bool Upgradable() const {return Status >= 1 && CandidateVer != NULL;}; inline bool Downgrade() const {return Status < 0 && Mode == ModeInstall;}; inline bool Held() const {return Status != 0 && Keep();}; inline bool NowBroken() const {return (DepState & DepNowMin) != DepNowMin;}; @@ -101,6 +258,7 @@ class pkgDepCache : protected pkgCache::Namespace inline bool InstBroken() const {return (DepState & DepInstMin) != DepInstMin;}; inline bool InstPolicyBroken() const {return (DepState & DepInstPolicy) != DepInstPolicy;}; inline bool Install() const {return Mode == ModeInstall;}; + inline bool ReInstall() const {return Delete() == false && (iFlags & pkgDepCache::ReInstall) == pkgDepCache::ReInstall;}; inline VerIterator InstVerIter(pkgCache &Cache) {return VerIterator(Cache,InstallVer);}; inline VerIterator CandidateVerIter(pkgCache &Cache) @@ -109,18 +267,37 @@ class pkgDepCache : protected pkgCache::Namespace // Helper functions void BuildGroupOrs(VerIterator const &V); - void UpdateVerState(PkgIterator Pkg); + void UpdateVerState(PkgIterator const &Pkg); // User Policy control class Policy { public: - - virtual VerIterator GetCandidateVer(PkgIterator Pkg); - virtual bool IsImportantDep(DepIterator Dep); - + Policy() { + InstallRecommends = _config->FindB("APT::Install-Recommends", false); + InstallSuggests = _config->FindB("APT::Install-Suggests", false); + } + + virtual VerIterator GetCandidateVer(PkgIterator const &Pkg); + virtual bool IsImportantDep(DepIterator const &Dep) const; + virtual signed short GetPriority(PkgIterator const &Pkg); + virtual signed short GetPriority(VerIterator const &Ver, bool ConsiderFiles=true); + virtual signed short GetPriority(PkgFileIterator const &File); + virtual ~Policy() {}; + + private: + bool InstallRecommends; + bool InstallSuggests; }; + + private: + /** The number of open "action groups"; certain post-action + * operations are suppressed if this number is > 0. + */ + int group_level; + + friend class ActionGroup; protected: @@ -128,77 +305,191 @@ class pkgDepCache : protected pkgCache::Namespace pkgCache *Cache; StateCache *PkgState; unsigned char *DepState; - - double iUsrSize; - double iDownloadSize; + + /** Stores the space changes after installation */ + signed long long iUsrSize; + /** Stores how much we need to download to get the packages */ + unsigned long long iDownloadSize; unsigned long iInstCount; unsigned long iDelCount; unsigned long iKeepCount; unsigned long iBrokenCount; unsigned long iPolicyBrokenCount; unsigned long iBadCount; - + + bool DebugMarker; + bool DebugAutoInstall; + Policy *delLocalPolicy; // For memory clean up.. Policy *LocalPolicy; // Check for a matching provides - bool CheckDep(DepIterator Dep,int Type,PkgIterator &Res); - inline bool CheckDep(DepIterator Dep,int Type) + bool CheckDep(DepIterator const &Dep,int const Type,PkgIterator &Res); + inline bool CheckDep(DepIterator const &Dep,int const Type) { PkgIterator Res(*this,0); return CheckDep(Dep,Type,Res); } // Computes state information for deps and versions (w/o storing) - unsigned char DependencyState(DepIterator &D); - unsigned char VersionState(DepIterator D,unsigned char Check, - unsigned char SetMin, - unsigned char SetPolicy); + unsigned char DependencyState(DepIterator const &D); + unsigned char VersionState(DepIterator D,unsigned char const Check, + unsigned char const SetMin, + unsigned char const SetPolicy) const; // Recalculates various portions of the cache, call after changing something void Update(DepIterator Dep); // Mostly internal void Update(PkgIterator const &P); // Count manipulators - void AddSizes(const PkgIterator &Pkg,signed long Mult = 1); - inline void RemoveSizes(const PkgIterator &Pkg) {AddSizes(Pkg,-1);}; - void AddStates(const PkgIterator &Pkg,int Add = 1); - inline void RemoveStates(const PkgIterator &Pkg) {AddStates(Pkg,-1);}; + void AddSizes(const PkgIterator &Pkg, bool const Invert = false); + inline void RemoveSizes(const PkgIterator &Pkg) {AddSizes(Pkg, true);}; + void AddStates(const PkgIterator &Pkg, bool const Invert = false); + inline void RemoveStates(const PkgIterator &Pkg) {AddStates(Pkg,true);}; public: // Legacy.. We look like a pkgCache inline operator pkgCache &() {return *Cache;}; inline Header &Head() {return *Cache->HeaderP;}; + inline GrpIterator GrpBegin() {return Cache->GrpBegin();}; inline PkgIterator PkgBegin() {return Cache->PkgBegin();}; - inline PkgIterator FindPkg(string const &Name) {return Cache->FindPkg(Name);}; + inline GrpIterator FindGrp(std::string const &Name) {return Cache->FindGrp(Name);}; + inline PkgIterator FindPkg(std::string const &Name) {return Cache->FindPkg(Name);}; + inline PkgIterator FindPkg(std::string const &Name, std::string const &Arch) {return Cache->FindPkg(Name, Arch);}; inline pkgCache &GetCache() {return *Cache;}; inline pkgVersioningSystem &VS() {return *Cache->VS;}; - + // Policy implementation - inline VerIterator GetCandidateVer(PkgIterator Pkg) {return LocalPolicy->GetCandidateVer(Pkg);}; - inline bool IsImportantDep(DepIterator Dep) {return LocalPolicy->IsImportantDep(Dep);}; + APT_DEPRECATED_MSG("Confusingly named method which returns the candidate as chosen by policy (NOT as chosen via .SetCandidateVersion!). You probably want to use .GetCandidateVersion instead.") inline VerIterator GetCandidateVer(PkgIterator const &Pkg) {return /* GetCandidateVersion(Pkg); but for API compat: */ LocalPolicy->GetCandidateVer(Pkg);}; + + inline bool IsImportantDep(DepIterator Dep) const {return LocalPolicy->IsImportantDep(Dep);}; inline Policy &GetPolicy() {return *LocalPolicy;}; // Accessors inline StateCache &operator [](PkgIterator const &I) {return PkgState[I->ID];}; + inline StateCache &operator [](PkgIterator const &I) const {return PkgState[I->ID];}; inline unsigned char &operator [](DepIterator const &I) {return DepState[I->ID];}; - // Manipulators - void MarkKeep(PkgIterator const &Pkg,bool Soft = false); - void MarkDelete(PkgIterator const &Pkg,bool Purge = false); - void MarkInstall(PkgIterator const &Pkg,bool AutoInst = true, - unsigned long Depth = 0, bool ForceImportantDeps = false); + /** \return A function identifying packages in the root set other + * than manually installed packages and essential packages, or \b + * NULL if an error occurs. + * + * \todo Is this the best place for this function? Perhaps the + * settings for mark-and-sweep should be stored in a single + * external class? + */ + virtual InRootSetFunc *GetRootSetFunc(); + + /** \return \b true if the garbage collector should follow recommendations. + */ + virtual bool MarkFollowsRecommends(); + + /** \return \b true if the garbage collector should follow suggestions. + */ + virtual bool MarkFollowsSuggests(); + + /** \brief Update the Marked and Garbage fields of all packages. + * + * This routine is implicitly invoked after all state manipulators + * and when an ActionGroup is destroyed. It invokes the private + * MarkRequired() and Sweep() to do its dirty work. + * + * \param rootFunc A predicate that returns \b true for packages + * that should be added to the root set. + */ + bool MarkAndSweep(InRootSetFunc &rootFunc); + bool MarkAndSweep(); + + /** \name State Manipulators + */ + // @{ + bool MarkKeep(PkgIterator const &Pkg, bool Soft = false, + bool FromUser = true, unsigned long Depth = 0); + bool MarkDelete(PkgIterator const &Pkg, bool MarkPurge = false, + unsigned long Depth = 0, bool FromUser = true); + bool MarkInstall(PkgIterator const &Pkg,bool AutoInst = true, + unsigned long Depth = 0, bool FromUser = true, + bool ForceImportantDeps = false); + void MarkProtected(PkgIterator const &Pkg) { PkgState[Pkg->ID].iFlags |= Protected; }; + void SetReInstall(PkgIterator const &Pkg,bool To); + + /** @return 'the' candidate version of a package + * + * The version returned is the version previously set explicitly via + * SetCandidate* methods like #SetCandidateVersion or if there wasn't one + * set the version as chosen via #Policy. + * + * @param Pkg is the package to return the candidate for + */ + pkgCache::VerIterator GetCandidateVersion(pkgCache::PkgIterator const &Pkg); void SetCandidateVersion(VerIterator TargetVer); - - // This is for debuging - void Update(OpProgress *Prog = 0); + bool SetCandidateRelease(pkgCache::VerIterator TargetVer, + std::string const &TargetRel); + /** Set the candidate version for dependencies too if needed. + * + * Sets not only the candidate version as SetCandidateVersion does, + * but walks also down the dependency tree and checks if it is required + * to set the candidate of the dependency to a version from the given + * release, too. + * + * \param TargetVer new candidate version of the package + * \param TargetRel try to switch to this release if needed + * \param[out] Changed a list of pairs consisting of the \b old + * version of the changed package and the version which + * required the switch of this dependency + * \return \b true if the switch was successful, \b false otherwise + */ + bool SetCandidateRelease(pkgCache::VerIterator TargetVer, + std::string const &TargetRel, + std::list > &Changed); + + /** Set the "is automatically installed" flag of Pkg. */ + void MarkAuto(const PkgIterator &Pkg, bool Auto); + // @} + + /** \return \b true if it's OK for MarkInstall to install + * the given package. + * + * The default implementation simply calls all IsInstallOk* + * method mentioned below. + * + * Overriding implementations should use the hold-state-flag to + * cache results from previous checks of this package - if possible. + * + * The parameters are the same as in the calling MarkInstall: + * \param Pkg the package that MarkInstall wants to install. + * \param AutoInst install this and all its dependencies + * \param Depth recursive deep of this Marker call + * \param FromUser was the install requested by the user? + */ + virtual bool IsInstallOk(const PkgIterator &Pkg,bool AutoInst = true, + unsigned long Depth = 0, bool FromUser = true); + + /** \return \b true if it's OK for MarkDelete to remove + * the given package. + * + * The default implementation simply calls all IsDeleteOk* + * method mentioned below, see also #IsInstallOk. + * + * The parameters are the same as in the calling MarkDelete: + * \param Pkg the package that MarkDelete wants to remove. + * \param MarkPurge should we purge instead of "only" remove? + * \param Depth recursive deep of this Marker call + * \param FromUser was the remove requested by the user? + */ + virtual bool IsDeleteOk(const PkgIterator &Pkg,bool MarkPurge = false, + unsigned long Depth = 0, bool FromUser = true); + + // read persistent states + bool readStateFile(OpProgress * const prog); + bool writeStateFile(OpProgress * const prog, bool const InstalledOnly=true); // Size queries - inline double UsrSize() {return iUsrSize;}; - inline double DebSize() {return iDownloadSize;}; + inline signed long long UsrSize() {return iUsrSize;}; + inline unsigned long long DebSize() {return iDownloadSize;}; inline unsigned long DelCount() {return iDelCount;}; inline unsigned long KeepCount() {return iKeepCount;}; inline unsigned long InstCount() {return iInstCount;}; @@ -206,10 +497,29 @@ class pkgDepCache : protected pkgCache::Namespace inline unsigned long PolicyBrokenCount() {return iPolicyBrokenCount;}; inline unsigned long BadCount() {return iBadCount;}; - bool Init(OpProgress *Prog); - - pkgDepCache(pkgCache *Cache,Policy *Plcy = 0); + bool Init(OpProgress * const Prog); + // Generate all state information + void Update(OpProgress * const Prog = 0); + + pkgDepCache(pkgCache * const Cache,Policy * const Plcy = 0); virtual ~pkgDepCache(); + + protected: + // methods call by IsInstallOk + bool IsInstallOkMultiArchSameVersionSynced(PkgIterator const &Pkg, + bool const AutoInst, unsigned long const Depth, bool const FromUser); + bool IsInstallOkDependenciesSatisfiableByCandidates(PkgIterator const &Pkg, + bool const AutoInst, unsigned long const Depth, bool const FromUser); + + // methods call by IsDeleteOk + bool IsDeleteOkProtectInstallRequests(PkgIterator const &Pkg, + bool const rPurge, unsigned long const Depth, bool const FromUser); + + private: + void * const d; + + APT_HIDDEN bool IsModeChangeOk(ModeList const mode, PkgIterator const &Pkg, + unsigned long const Depth, bool const FromUser); }; #endif