diff options
Diffstat (limited to 'apt-pkg/edsp.cc')
| -rw-r--r-- | apt-pkg/edsp.cc | 1195 |
1 files changed, 1195 insertions, 0 deletions
diff --git a/apt-pkg/edsp.cc b/apt-pkg/edsp.cc new file mode 100644 index 0000000..b0ac4ae --- /dev/null +++ b/apt-pkg/edsp.cc @@ -0,0 +1,1195 @@ +// -*- mode: cpp; mode: fold -*- +// Description /*{{{*/ +/* ###################################################################### + Set of methods to help writing and reading everything needed for EDSP + ##################################################################### */ + /*}}}*/ +// Include Files /*{{{*/ +#include <config.h> + +#include <apt-pkg/algorithms.h> +#include <apt-pkg/aptconfiguration.h> +#include <apt-pkg/cacheset.h> +#include <apt-pkg/depcache.h> +#include <apt-pkg/edsp.h> +#include <apt-pkg/error.h> +#include <apt-pkg/fileutl.h> +#include <apt-pkg/packagemanager.h> +#include <apt-pkg/pkgcache.h> +#include <apt-pkg/pkgsystem.h> +#include <apt-pkg/prettyprinters.h> +#include <apt-pkg/progress.h> +#include <apt-pkg/string_view.h> +#include <apt-pkg/strutl.h> +#include <apt-pkg/tagfile.h> + +#include <cctype> +#include <cstddef> +#include <cstdio> +#include <cstring> +#include <sys/stat.h> +#include <unistd.h> + +#include <algorithm> +#include <array> +#include <limits> +#include <sstream> +#include <string> + +#include <apti18n.h> + /*}}}*/ + +using std::string; + +// we could use pkgCache::DepType and ::Priority, but these would be localized strings… +constexpr char const * const PrioMap[] = { + nullptr, "important", "required", "standard", + "optional", "extra" +}; +constexpr char const * const DepMap[] = { + nullptr, "Depends", "Pre-Depends", "Suggests", + "Recommends" , "Conflicts", "Replaces", + "Obsoletes", "Breaks", "Enhances" +}; + +// WriteOkay - varaidic helper to easily Write to a FileFd /*{{{*/ +static bool WriteOkay_fn(FileFd &) { return true; } +template<typename... Tail> static bool WriteOkay_fn(FileFd &output, APT::StringView data, Tail... more_data) +{ + return likely(output.Write(data.data(), data.length()) && WriteOkay_fn(output, more_data...)); +} +template<typename... Tail> static bool WriteOkay_fn(FileFd &output, unsigned int data, Tail... more_data) +{ + std::string number; + strprintf(number, "%d", data); + return likely(output.Write(number.data(), number.length()) && WriteOkay_fn(output, more_data...)); +} +template<typename... Data> static bool WriteOkay(bool &Okay, FileFd &output, Data&&... data) +{ + Okay = likely(Okay && WriteOkay_fn(output, std::forward<Data>(data)...)); + return Okay; +} +template<typename... Data> static bool WriteOkay(FileFd &output, Data&&... data) +{ + bool Okay = likely(output.Failed() == false); + return WriteOkay(Okay, output, std::forward<Data>(data)...); +} + /*}}}*/ +// WriteScenarioVersion /*{{{*/ +static bool WriteScenarioVersion(FileFd &output, pkgCache::PkgIterator const &Pkg, + pkgCache::VerIterator const &Ver) +{ + bool Okay = WriteOkay(output, "Package: ", Pkg.Name(), + "\nArchitecture: ", Ver.Arch(), + "\nVersion: ", Ver.VerStr()); + WriteOkay(Okay, output, "\nAPT-ID: ", Ver->ID); + if (Ver.PhasedUpdatePercentage() != 100) + WriteOkay(Okay, output, "\nPhased-Update-Percentage: ", Ver.PhasedUpdatePercentage()); + if ((Pkg->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential) + WriteOkay(Okay, output, "\nEssential: yes"); + if ((Ver->MultiArch & pkgCache::Version::Allowed) == pkgCache::Version::Allowed) + WriteOkay(Okay, output, "\nMulti-Arch: allowed"); + else if ((Ver->MultiArch & pkgCache::Version::Foreign) == pkgCache::Version::Foreign) + WriteOkay(Okay, output, "\nMulti-Arch: foreign"); + else if ((Ver->MultiArch & pkgCache::Version::Same) == pkgCache::Version::Same) + WriteOkay(Okay, output, "\nMulti-Arch: same"); + return Okay; +} + /*}}}*/ +// WriteScenarioDependency /*{{{*/ +static bool WriteScenarioDependency(FileFd &output, pkgCache::VerIterator const &Ver, bool const OnlyCritical) +{ + std::array<std::string, APT_ARRAY_SIZE(DepMap)> dependencies; + bool orGroup = false; + for (pkgCache::DepIterator Dep = Ver.DependsList(); Dep.end() == false; ++Dep) + { + if (Dep.IsImplicit() == true) + continue; + if (OnlyCritical && Dep.IsCritical() == false) + continue; + if (orGroup == false && dependencies[Dep->Type].empty() == false) + dependencies[Dep->Type].append(", "); + dependencies[Dep->Type].append(Dep.TargetPkg().Name()); + if (Dep->Version != 0) + dependencies[Dep->Type].append(" (").append(pkgCache::CompTypeDeb(Dep->CompareOp)).append(" ").append(Dep.TargetVer()).append(")"); + if ((Dep->CompareOp & pkgCache::Dep::Or) == pkgCache::Dep::Or) + { + dependencies[Dep->Type].append(" | "); + orGroup = true; + } + else + orGroup = false; + } + bool Okay = output.Failed() == false; + for (size_t i = 1; i < dependencies.size(); ++i) + if (dependencies[i].empty() == false) + WriteOkay(Okay, output, "\n", DepMap[i], ": ", dependencies[i]); + std::vector<std::string> provides; + for (auto Prv = Ver.ProvidesList(); not Prv.end(); ++Prv) + { + if (Prv.IsMultiArchImplicit()) + continue; + std::string provide = Prv.Name(); + if (Prv->ProvideVersion != 0) + provide.append(" (= ").append(Prv.ProvideVersion()).append(")"); + if ((Ver->MultiArch & pkgCache::Version::Foreign) != 0 && std::find(provides.cbegin(), provides.cend(), provide) != provides.cend()) + continue; + provides.emplace_back(std::move(provide)); + } + if (not provides.empty()) + { + std::ostringstream out; + std::copy(provides.begin(), provides.end() - 1, std::ostream_iterator<std::string>(out, ", ")); + out << provides.back(); + WriteOkay(Okay, output, "\nProvides: ", out.str()); + } + return WriteOkay(Okay, output, "\n"); +} + /*}}}*/ +// WriteScenarioLimitedDependency /*{{{*/ +static bool WriteScenarioLimitedDependency(FileFd &output, + pkgCache::VerIterator const &Ver, + std::vector<bool> const &pkgset, + bool const OnlyCritical) +{ + std::array<std::string, APT_ARRAY_SIZE(DepMap)> dependencies; + bool orGroup = false; + for (pkgCache::DepIterator Dep = Ver.DependsList(); Dep.end() == false; ++Dep) + { + if (Dep.IsImplicit() == true) + continue; + if (OnlyCritical && Dep.IsCritical() == false) + continue; + if (orGroup == false) + { + if (pkgset[Dep.TargetPkg()->ID] == false) + continue; + if (dependencies[Dep->Type].empty() == false) + dependencies[Dep->Type].append(", "); + } + else if (pkgset[Dep.TargetPkg()->ID] == false) + { + if ((Dep->CompareOp & pkgCache::Dep::Or) == pkgCache::Dep::Or) + continue; + dependencies[Dep->Type].erase(dependencies[Dep->Type].end()-3, dependencies[Dep->Type].end()); + orGroup = false; + continue; + } + dependencies[Dep->Type].append(Dep.TargetPkg().Name()); + if (Dep->Version != 0) + dependencies[Dep->Type].append(" (").append(pkgCache::CompTypeDeb(Dep->CompareOp)).append(" ").append(Dep.TargetVer()).append(")"); + if ((Dep->CompareOp & pkgCache::Dep::Or) == pkgCache::Dep::Or) + { + dependencies[Dep->Type].append(" | "); + orGroup = true; + } + else + orGroup = false; + } + bool Okay = output.Failed() == false; + for (size_t i = 1; i < dependencies.size(); ++i) + if (dependencies[i].empty() == false) + WriteOkay(Okay, output, "\n", DepMap[i], ": ", dependencies[i]); + string provides; + for (pkgCache::PrvIterator Prv = Ver.ProvidesList(); Prv.end() == false; ++Prv) + { + if (Prv.IsMultiArchImplicit() == true) + continue; + if (pkgset[Prv.ParentPkg()->ID] == false) + continue; + if (provides.empty() == false) + provides.append(", "); + provides.append(Prv.Name()); + if (Prv->ProvideVersion != 0) + provides.append(" (= ").append(Prv.ProvideVersion()).append(")"); + } + if (provides.empty() == false) + WriteOkay(Okay, output, "\nProvides: ", provides); + return WriteOkay(Okay, output, "\n"); +} + /*}}}*/ +static bool checkKnownArchitecture(std::string const &arch) /*{{{*/ +{ + if (APT::Configuration::checkArchitecture(arch)) + return true; + static auto const veryforeign = _config->FindVector("APT::BarbarianArchitectures"); + return std::find(veryforeign.begin(), veryforeign.end(), arch) != veryforeign.end(); +} + /*}}}*/ +static bool WriteGenericRequestHeaders(FileFd &output, APT::StringView const head)/*{{{*/ +{ + bool Okay = WriteOkay(output, head, "Architecture: ", _config->Find("APT::Architecture"), "\n", + "Architectures:"); + for (auto const &a : APT::Configuration::getArchitectures()) + WriteOkay(Okay, output, " ", a); + for (auto const &a : _config->FindVector("APT::BarbarianArchitectures")) + WriteOkay(Okay, output, " ", a); + return WriteOkay(Okay, output, "\n"); +} + /*}}}*/ +static bool SkipUnavailableVersions(pkgDepCache &Cache, pkgCache::PkgIterator const &Pkg, pkgCache::VerIterator const &Ver)/*{{{*/ +{ + /* versions which aren't current and aren't available in + any "online" source file are bad, expect if they are the chosen + candidate: The exception is for build-dep implementation as it creates + such pseudo (package) versions and removes them later on again. + We filter out versions at all so packages in 'rc' state only available + in dpkg/status aren't passed to solvers as they can't be installed. */ + if (Pkg->CurrentVer != 0) + return false; + if (Cache.GetCandidateVersion(Pkg) == Ver) + return false; + for (pkgCache::VerFileIterator I = Ver.FileList(); I.end() == false; ++I) + if (I.File().Flagged(pkgCache::Flag::NotSource) == false) + return false; + return true; +} + /*}}}*/ +static bool WriteScenarioEDSPVersion(pkgDepCache &Cache, FileFd &output, pkgCache::PkgIterator const &Pkg,/*{{{*/ + pkgCache::VerIterator const &Ver) +{ + bool Okay = WriteOkay(output, "\nSource: ", Ver.SourcePkgName(), + "\nSource-Version: ", Ver.SourceVerStr()); + if (PrioMap[Ver->Priority] != nullptr) + WriteOkay(Okay, output, "\nPriority: ", PrioMap[Ver->Priority]); + if (Ver->Section != 0) + WriteOkay(Okay, output, "\nSection: ", Ver.Section()); + if (Pkg.CurrentVer() == Ver) + WriteOkay(Okay, output, "\nInstalled: yes"); + if (Pkg->SelectedState == pkgCache::State::Hold || + (Cache[Pkg].Keep() == true && Cache[Pkg].Protect() == true)) + WriteOkay(Okay, output, "\nHold: yes"); + std::set<string> Releases; + for (pkgCache::VerFileIterator I = Ver.FileList(); I.end() == false; ++I) { + pkgCache::PkgFileIterator File = I.File(); + if (File.Flagged(pkgCache::Flag::NotSource) == false) { + string Release = File.RelStr(); + if (!Release.empty()) + Releases.insert(Release); + } + } + if (!Releases.empty()) { + WriteOkay(Okay, output, "\nAPT-Release:"); + for (std::set<string>::iterator R = Releases.begin(); R != Releases.end(); ++R) + WriteOkay(Okay, output, "\n ", *R); + } + WriteOkay(Okay, output, "\nAPT-Pin: ", Cache.GetPolicy().GetPriority(Ver)); + if (Cache.GetCandidateVersion(Pkg) == Ver) + WriteOkay(Okay, output, "\nAPT-Candidate: yes"); + if ((Cache[Pkg].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto) + WriteOkay(Okay, output, "\nAPT-Automatic: yes"); + return Okay; +} + /*}}}*/ +// EDSP::WriteScenario - to the given file descriptor /*{{{*/ +bool EDSP::WriteScenario(pkgDepCache &Cache, FileFd &output, OpProgress *Progress) +{ + if (Progress != NULL) + Progress->SubProgress(Cache.Head().VersionCount, _("Send scenario to solver")); + decltype(Cache.Head().VersionCount) p = 0; + bool Okay = output.Failed() == false; + for (pkgCache::PkgIterator Pkg = Cache.PkgBegin(); Pkg.end() == false && likely(Okay); ++Pkg) + { + if (Pkg->CurrentVer == 0 && not checkKnownArchitecture(Pkg.Arch())) + continue; + for (pkgCache::VerIterator Ver = Pkg.VersionList(); Ver.end() == false && likely(Okay); ++Ver, ++p) + { + if (SkipUnavailableVersions(Cache, Pkg, Ver)) + continue; + Okay &= WriteScenarioVersion(output, Pkg, Ver); + Okay &= WriteScenarioEDSPVersion(Cache, output, Pkg, Ver); + Okay &= WriteScenarioDependency(output, Ver, false); + WriteOkay(Okay, output, "\n"); + if (Progress != NULL && p % 100 == 0) + Progress->Progress(p); + } + } + return Okay; +} + /*}}}*/ +// EDSP::WriteLimitedScenario - to the given file descriptor /*{{{*/ +bool EDSP::WriteLimitedScenario(pkgDepCache &Cache, FileFd &output, + std::vector<bool> const &pkgset, + OpProgress *Progress) +{ + if (Progress != NULL) + Progress->SubProgress(Cache.Head().VersionCount, _("Send scenario to solver")); + decltype(Cache.Head().PackageCount) p = 0; + bool Okay = output.Failed() == false; + for (auto Pkg = Cache.PkgBegin(); Pkg.end() == false && likely(Okay); ++Pkg, ++p) + { + if (pkgset[Pkg->ID] == false) + continue; + for (pkgCache::VerIterator Ver = Pkg.VersionList(); Ver.end() == false && likely(Okay); ++Ver) + { + if (SkipUnavailableVersions(Cache, Pkg, Ver)) + continue; + Okay &= WriteScenarioVersion(output, Pkg, Ver); + Okay &= WriteScenarioEDSPVersion(Cache, output, Pkg, Ver); + Okay &= WriteScenarioLimitedDependency(output, Ver, pkgset, false); + WriteOkay(Okay, output, "\n"); + if (Progress != NULL && p % 100 == 0) + Progress->Progress(p); + } + } + if (Progress != NULL) + Progress->Done(); + return Okay; +} + /*}}}*/ +// EDSP::WriteRequest - to the given file descriptor /*{{{*/ +bool EDSP::WriteRequest(pkgDepCache &Cache, FileFd &output, + unsigned int const flags, + OpProgress *Progress) +{ + if (Progress != NULL) + Progress->SubProgress(Cache.Head().PackageCount, _("Send request to solver")); + decltype(Cache.Head().PackageCount) p = 0; + string del, inst; + for (pkgCache::PkgIterator Pkg = Cache.PkgBegin(); Pkg.end() == false; ++Pkg, ++p) + { + if (Progress != NULL && p % 100 == 0) + Progress->Progress(p); + string* req; + pkgDepCache::StateCache &P = Cache[Pkg]; + if (P.Delete() == true) + req = &del; + else if (P.NewInstall() == true || P.Upgrade() == true || P.ReInstall() == true || + (P.Mode == pkgDepCache::ModeKeep && (P.iFlags & pkgDepCache::Protected) == pkgDepCache::Protected)) + req = &inst; + else + continue; + req->append(" ").append(Pkg.FullName()); + } + + bool Okay = WriteGenericRequestHeaders(output, "Request: EDSP 0.5\n"); + string machineID = APT::Configuration::getMachineID(); + if (not machineID.empty()) + WriteOkay(Okay, output, "Machine-ID: ", machineID, "\n"); + if (del.empty() == false) + WriteOkay(Okay, output, "Remove:", del, "\n"); + if (inst.empty() == false) + WriteOkay(Okay, output, "Install:", inst, "\n"); + if (flags & Request::AUTOREMOVE) + WriteOkay(Okay, output, "Autoremove: yes\n"); + if (flags & Request::UPGRADE_ALL) + { + WriteOkay(Okay, output, "Upgrade-All: yes\n"); + if (flags & (Request::FORBID_NEW_INSTALL | Request::FORBID_REMOVE)) + WriteOkay(Okay, output, "Upgrade: yes\n"); + else + WriteOkay(Okay, output, "Dist-Upgrade: yes\n"); + } + if (flags & Request::FORBID_NEW_INSTALL) + WriteOkay(Okay, output, "Forbid-New-Install: yes\n"); + if (flags & Request::FORBID_REMOVE) + WriteOkay(Okay, output, "Forbid-Remove: yes\n"); + auto const solver = _config->Find("APT::Solver", "internal"); + WriteOkay(Okay, output, "Solver: ", solver, "\n"); + if (_config->FindB("APT::Solver::Strict-Pinning", true) == false) + WriteOkay(Okay, output, "Strict-Pinning: no\n"); + string solverpref("APT::Solver::"); + solverpref.append(solver).append("::Preferences"); + if (_config->Exists(solverpref) == true) + WriteOkay(Okay, output, "Preferences: ", _config->Find(solverpref,""), "\n"); + return WriteOkay(Okay, output, "\n"); +} + /*}}}*/ +// EDSP::ReadResponse - from the given file descriptor /*{{{*/ +bool EDSP::ReadResponse(int const input, pkgDepCache &Cache, OpProgress *Progress) { + /* We build an map id to mmap offset here + In theory we could use the offset as ID, but then VersionCount + couldn't be used to create other versionmappings anymore and it + would be too easy for a (buggy) solver to segfault APT… */ + auto VersionCount = Cache.Head().VersionCount; + decltype(VersionCount) VerIdx[VersionCount]; + for (pkgCache::PkgIterator P = Cache.PkgBegin(); P.end() == false; ++P) { + for (pkgCache::VerIterator V = P.VersionList(); V.end() == false; ++V) + VerIdx[V->ID] = V.Index(); + Cache[P].Marked = true; + Cache[P].Garbage = false; + } + + FileFd in; + in.OpenDescriptor(input, FileFd::ReadOnly, true); + pkgTagFile response(&in, 100); + pkgTagSection section; + + std::set<decltype(Cache.PkgBegin()->ID)> seenOnce; + while (response.Step(section) == true) { + std::string type; + if (section.Exists("Install") == true) + type = "Install"; + else if (section.Exists("Remove") == true) + type = "Remove"; + else if (section.Exists("Progress") == true) { + if (Progress != NULL) { + string msg = section.FindS("Message"); + if (msg.empty() == true) + msg = _("Prepare for receiving solution"); + Progress->SubProgress(100, msg, section.FindI("Percentage", 0)); + } + continue; + } else if (section.Exists("Error") == true) { + if (_error->PendingError()) { + if (Progress != nullptr) + Progress->Done(); + Progress = nullptr; + _error->DumpErrors(std::cerr, GlobalError::DEBUG, false); + } + std::string msg = SubstVar(SubstVar(section.FindS("Message"), "\n .\n", "\n\n"), "\n ", "\n"); + if (msg.empty() == true) { + msg = _("External solver failed without a proper error message"); + _error->Error("%s", msg.c_str()); + } else + _error->Error("External solver failed with: %s", msg.substr(0,msg.find('\n')).c_str()); + if (Progress != nullptr) + Progress->Done(); + std::cerr << "The solver encountered an error of type: " << section.FindS("Error") << std::endl; + std::cerr << "The following information might help you to understand what is wrong:" << std::endl; + std::cerr << msg << std::endl << std::endl; + return false; + } else if (section.Exists("Autoremove") == true) + type = "Autoremove"; + else { + char const *Start, *End; + section.GetSection(Start, End); + _error->Warning("Encountered an unexpected section with %d fields: %s", section.Count(), std::string(Start, End).c_str()); + continue; + } + + decltype(VersionCount) const id = section.FindULL(type, VersionCount); + if (id == VersionCount) { + _error->Warning("Unable to parse %s request with id value '%s'!", type.c_str(), section.FindS(type.c_str()).c_str()); + continue; + } else if (id > VersionCount) { + _error->Warning("ID value '%s' in %s request stanza is to high to refer to a known version!", section.FindS(type.c_str()).c_str(), type.c_str()); + continue; + } + + pkgCache::VerIterator Ver(Cache.GetCache(), Cache.GetCache().VerP + VerIdx[id]); + auto const Pkg = Ver.ParentPkg(); + if (type == "Autoremove") { + Cache[Pkg].Marked = false; + Cache[Pkg].Garbage = true; + } else if (seenOnce.emplace(Pkg->ID).second == false) { + _error->Warning("Ignoring %s stanza received for package %s which already had a previous stanza effecting it!", type.c_str(), Pkg.FullName(false).c_str()); + } else if (type == "Install") { + if (Pkg.CurrentVer() == Ver) { + _error->Warning("Ignoring Install stanza received for version %s of package %s which is already installed!", + Ver.VerStr(), Pkg.FullName(false).c_str()); + } else { + Cache.SetCandidateVersion(Ver); + Cache.MarkInstall(Pkg, false, 0, false); + } + } else if (type == "Remove") { + if (Pkg->CurrentVer == 0) + _error->Warning("Ignoring Remove stanza received for version %s of package %s which isn't installed!", + Ver.VerStr(), Pkg.FullName(false).c_str()); + else if (Pkg.CurrentVer() != Ver) + _error->Warning("Ignoring Remove stanza received for version %s of package %s which isn't the installed version %s!", + Ver.VerStr(), Pkg.FullName(false).c_str(), Pkg.CurrentVer().VerStr()); + else + Cache.MarkDelete(Ver.ParentPkg(), false); + } + } + return true; +} + /*}}}*/ +// ReadLine - first line from the given file descriptor /*{{{*/ +// --------------------------------------------------------------------- +/* Little helper method to read a complete line into a string. Similar to + fgets but we need to use the low-level read() here as otherwise the + listparser will be confused later on as mixing of fgets and read isn't + a supported action according to the manpages and results are undefined */ +static bool ReadLine(int const input, std::string &line) { + char one; + ssize_t data = 0; + line.erase(); + line.reserve(100); + while ((data = read(input, &one, sizeof(one))) != -1) { + if (data != 1) + continue; + if (one == '\n') + return true; + if (one == '\r') + continue; + if (line.empty() == true && isblank(one) != 0) + continue; + line += one; + } + return false; +} + /*}}}*/ +// StringToBool - convert yes/no to bool /*{{{*/ +// --------------------------------------------------------------------- +/* we are not as lazy as we are in the global StringToBool as we really + only accept yes/no here */ +static bool localStringToBool(std::string answer, bool const defValue) { + std::transform(answer.begin(), answer.end(), answer.begin(), ::tolower); + if (answer == "yes") + return true; + else if (answer == "no") + return false; + else + _error->Warning("Value '%s' is not a boolean 'yes' or 'no'!", answer.c_str()); + return defValue; +} + /*}}}*/ +static bool LineStartsWithAndStrip(std::string &line, APT::StringView const with)/*{{{*/ +{ + if (line.compare(0, with.size(), with.data()) != 0) + return false; + line = APT::String::Strip(line.substr(with.length())); + return true; +} + /*}}}*/ +static bool ReadFlag(unsigned int &flags, std::string &line, APT::StringView const name, unsigned int const setflag)/*{{{*/ +{ + if (LineStartsWithAndStrip(line, name) == false) + return false; + if (localStringToBool(line, false)) + flags |= setflag; + else + flags &= ~setflag; + return true; +} + /*}}}*/ +// EDSP::ReadRequest - first stanza from the given file descriptor /*{{{*/ +bool EDSP::ReadRequest(int const input, std::list<std::string> &install, + std::list<std::string> &remove, unsigned int &flags) +{ + install.clear(); + remove.clear(); + flags = 0; + std::string line; + while (ReadLine(input, line) == true) + { + // Skip empty lines before request + if (line.empty() == true) + continue; + // The first Tag must be a request, so search for it + if (LineStartsWithAndStrip(line, "Request:")) + continue; + + while (ReadLine(input, line) == true) + { + // empty lines are the end of the request + if (line.empty() == true) + return true; + + std::list<std::string> *request = NULL; + if (LineStartsWithAndStrip(line, "Install:")) + request = &install; + else if (LineStartsWithAndStrip(line, "Remove:")) + request = &remove; + else if (ReadFlag(flags, line, "Upgrade:", (Request::UPGRADE_ALL | Request::FORBID_REMOVE | Request::FORBID_NEW_INSTALL)) || + ReadFlag(flags, line, "Dist-Upgrade:", Request::UPGRADE_ALL) || + ReadFlag(flags, line, "Upgrade-All:", Request::UPGRADE_ALL) || + ReadFlag(flags, line, "Forbid-New-Install:", Request::FORBID_NEW_INSTALL) || + ReadFlag(flags, line, "Forbid-Remove:", Request::FORBID_REMOVE) || + ReadFlag(flags, line, "Autoremove:", Request::AUTOREMOVE)) + ; + else if (LineStartsWithAndStrip(line, "Architecture:")) + _config->Set("APT::Architecture", line); + else if (LineStartsWithAndStrip(line, "Architectures:")) + _config->Set("APT::Architectures", SubstVar(line, " ", ",")); + else if (LineStartsWithAndStrip(line, "Machine-ID")) + _config->Set("APT::Machine-ID", line); + else if (LineStartsWithAndStrip(line, "Solver:")) + ; // purely informational line + else + _error->Warning("Unknown line in EDSP Request stanza: %s", line.c_str()); + + if (request == NULL) + continue; + auto const pkgs = VectorizeString(line, ' '); + std::move(pkgs.begin(), pkgs.end(), std::back_inserter(*request)); + } + } + return false; +} /*}}}*/ +// EDSP::ApplyRequest - first stanza from the given file descriptor /*{{{*/ +bool EDSP::ApplyRequest(std::list<std::string> const &install, + std::list<std::string> const &remove, + pkgDepCache &Cache) +{ + for (std::list<std::string>::const_iterator i = install.begin(); + i != install.end(); ++i) { + pkgCache::PkgIterator P = Cache.FindPkg(*i); + if (P.end() == true) + _error->Warning("Package %s is not known, so can't be installed", i->c_str()); + else + Cache.MarkInstall(P, false); + } + + for (std::list<std::string>::const_iterator i = remove.begin(); + i != remove.end(); ++i) { + pkgCache::PkgIterator P = Cache.FindPkg(*i); + if (P.end() == true) + _error->Warning("Package %s is not known, so can't be installed", i->c_str()); + else + Cache.MarkDelete(P); + } + return true; +} + /*}}}*/ +// EDSP::WriteSolutionStanza - to the given file descriptor /*{{{*/ +bool EDSP::WriteSolutionStanza(FileFd &output, char const * const Type, pkgCache::VerIterator const &Ver) +{ + bool Okay = output.Failed() == false; + WriteOkay(Okay, output, Type, ": ", _system->GetVersionMapping(Ver->ID)); + if (_config->FindB("Debug::EDSP::WriteSolution", false) == true) + WriteOkay(Okay, output, "\nPackage: ", Ver.ParentPkg().FullName(), "\nVersion: ", Ver.VerStr()); + return WriteOkay(Okay, output, "\n\n"); +} + /*}}}*/ +// EDSP::WriteProgess - pulse to the given file descriptor /*{{{*/ +bool EDSP::WriteProgress(unsigned short const percent, const char* const message, FileFd &output) { + return WriteOkay(output, "Progress: ", TimeRFC1123(time(NULL), true), "\n", + "Percentage: ", percent, "\n", + "Message: ", message, "\n\n") && output.Flush(); +} + /*}}}*/ +// EDSP::WriteError - format an error message to be send to file descriptor /*{{{*/ +static std::string formatMessage(std::string const &msg) +{ + return SubstVar(SubstVar(APT::String::Strip(msg), "\n\n", "\n.\n"), "\n", "\n "); +} +bool EDSP::WriteError(char const * const uuid, std::string const &message, FileFd &output) { + return WriteOkay(output, "Error: ", uuid, "\n", + "Message: ", formatMessage(message), + "\n\n"); +} + /*}}}*/ +static std::string findExecutable(std::vector<std::string> const &dirs, char const * const binary) {/*{{{*/ + for (auto && dir : dirs) { + std::string const file = flCombine(dir, binary); + if (RealFileExists(file) == true) + return file; + } + return ""; +} + /*}}}*/ +static pid_t ExecuteExternal(char const* const type, char const * const binary, char const * const configdir, int * const solver_in, int * const solver_out) {/*{{{*/ + auto const solverDirs = _config->FindVector(configdir); + auto const file = findExecutable(solverDirs, binary); + std::string dumper; + { + dumper = findExecutable(solverDirs, "apt-dump-solver"); + if (dumper.empty()) + dumper = findExecutable(solverDirs, "dump"); + } + + if (file.empty() == true) + { + _error->Error("Can't call external %s '%s' as it is not in a configured directory!", type, binary); + return 0; + } + int external[4] = {-1, -1, -1, -1}; + if (pipe(external) != 0 || pipe(external + 2) != 0) + { + _error->Errno("Resolve", "Can't create needed IPC pipes for EDSP"); + return 0; + } + for (int i = 0; i < 4; ++i) + SetCloseExec(external[i], true); + + pid_t Solver = ExecFork(); + if (Solver == 0) { + dup2(external[0], STDIN_FILENO); + dup2(external[3], STDOUT_FILENO); + auto const dumpfile = _config->FindFile((std::string("Dir::Log::") + type).c_str()); + auto const dumpdir = flNotFile(dumpfile); + auto const runasuser = _config->Find(std::string("APT::") + type + "::" + binary + "::RunAsUser", + _config->Find(std::string("APT::") + type + "::RunAsUser", + _config->Find("APT::Sandbox::User"))); + if (dumper.empty() || dumpfile.empty() || dumper == file || CreateAPTDirectoryIfNeeded(dumpdir, dumpdir) == false) + { + _config->Set("APT::Sandbox::User", runasuser); + DropPrivileges(); + char const * const calling[] = { file.c_str(), nullptr }; + execv(calling[0], const_cast<char**>(calling)); + } + else + { + char const * const calling[] = { dumper.c_str(), "--user", runasuser.c_str(), dumpfile.c_str(), file.c_str(), nullptr }; + execv(calling[0], const_cast<char**>(calling)); + } + std::cerr << "Failed to execute " << type << " '" << binary << "'!" << std::endl; + _exit(100); + } + close(external[0]); + close(external[3]); + + if (WaitFd(external[1], true, 5) == false) + { + _error->Errno("Resolve", "Timed out while Waiting on availability of %s stdin", type); + return 0; + } + + *solver_in = external[1]; + *solver_out = external[2]; + return Solver; +} + /*}}}*/ +// EDSP::ExecuteSolver - fork requested solver and setup ipc pipes {{{*/ +pid_t EDSP::ExecuteSolver(const char* const solver, int * const solver_in, int * const solver_out, bool) { + return ExecuteExternal("solver", solver, "Dir::Bin::Solvers", solver_in, solver_out); +} + /*}}}*/ +static bool CreateDumpFile(char const * const id, char const * const type, FileFd &output)/*{{{*/ +{ + auto const dumpfile = _config->FindFile((std::string("Dir::Log::") + type).c_str()); + if (dumpfile.empty()) + return false; + auto const dumpdir = flNotFile(dumpfile); + _error->PushToStack(); + bool errored_out = CreateAPTDirectoryIfNeeded(dumpdir, dumpdir) == false || + output.Open(dumpfile, FileFd::WriteOnly | FileFd::Exclusive | FileFd::Create, FileFd::Extension, 0644) == false; + std::vector<std::string> downgrademsgs; + while (_error->empty() == false) + { + std::string msg; + _error->PopMessage(msg); + downgrademsgs.emplace_back(std::move(msg)); + } + _error->RevertToStack(); + for (auto && msg : downgrademsgs) + _error->Warning("%s", msg.c_str()); + if (errored_out) + return _error->WarningE(id, _("Could not open file '%s'"), dumpfile.c_str()); + return true; +} + /*}}}*/ +// EDSP::ResolveExternal - resolve problems by asking external for help {{{*/ +bool EDSP::ResolveExternal(const char* const solver, pkgDepCache &Cache, + unsigned int const flags, OpProgress *Progress) { + if (strcmp(solver, "internal") == 0) + { + FileFd output; + bool Okay = CreateDumpFile("EDSP::Resolve", "solver", output); + Okay &= EDSP::WriteRequest(Cache, output, flags, nullptr); + return Okay && EDSP::WriteScenario(Cache, output, nullptr); + } + _error->PushToStack(); + int solver_in, solver_out; + pid_t const solver_pid = ExecuteSolver(solver, &solver_in, &solver_out, true); + if (solver_pid == 0) + return false; + + FileFd output; + if (output.OpenDescriptor(solver_in, FileFd::WriteOnly | FileFd::BufferedWrite, true) == false) + return _error->Errno("ResolveExternal", "Opening solver %s stdin on fd %d for writing failed", solver, solver_in); + + bool Okay = output.Failed() == false; + if (Okay && Progress != NULL) + Progress->OverallProgress(0, 100, 5, _("Execute external solver")); + Okay &= EDSP::WriteRequest(Cache, output, flags, Progress); + if (Okay && Progress != NULL) + Progress->OverallProgress(5, 100, 20, _("Execute external solver")); + Okay &= EDSP::WriteScenario(Cache, output, Progress); + output.Close(); + + if (Okay && Progress != NULL) + Progress->OverallProgress(25, 100, 75, _("Execute external solver")); + bool const ret = EDSP::ReadResponse(solver_out, Cache, Progress); + _error->MergeWithStack(); + if (ExecWait(solver_pid, solver)) + return ret; + return false; +} /*}}}*/ + +bool EIPP::OrderInstall(char const * const solver, pkgPackageManager * const PM, /*{{{*/ + unsigned int const flags, OpProgress * const Progress) +{ + if (strcmp(solver, "internal") == 0) + { + FileFd output; + _error->PushToStack(); + bool Okay = CreateDumpFile("EIPP::OrderInstall", "planner", output); + if (Okay == false && dynamic_cast<pkgSimulate*>(PM) != nullptr) + { + _error->RevertToStack(); + return false; + } + _error->MergeWithStack(); + Okay &= EIPP::WriteRequest(PM->Cache, output, flags, nullptr); + return Okay && EIPP::WriteScenario(PM->Cache, output, nullptr); + } + _error->PushToStack(); + int solver_in, solver_out; + pid_t const solver_pid = ExecuteExternal("planner", solver, "Dir::Bin::Planners", &solver_in, &solver_out); + if (solver_pid == 0) + return false; + + FileFd output; + if (output.OpenDescriptor(solver_in, FileFd::WriteOnly | FileFd::BufferedWrite, true) == false) + return _error->Errno("EIPP::OrderInstall", "Opening planner %s stdin on fd %d for writing failed", solver, solver_in); + + bool Okay = output.Failed() == false; + if (Okay && Progress != NULL) + Progress->OverallProgress(0, 100, 5, _("Execute external planner")); + Okay &= EIPP::WriteRequest(PM->Cache, output, flags, Progress); + if (Okay && Progress != NULL) + Progress->OverallProgress(5, 100, 20, _("Execute external planner")); + Okay &= EIPP::WriteScenario(PM->Cache, output, Progress); + output.Close(); + + if (Okay) + { + if (Progress != nullptr) + Progress->OverallProgress(25, 100, 75, _("Execute external planner")); + + // we don't tell the external planners about boring things + for (auto Pkg = PM->Cache.PkgBegin(); Pkg.end() == false; ++Pkg) + { + if (Pkg->CurrentState == pkgCache::State::ConfigFiles && PM->Cache[Pkg].Purge() == true) + PM->Remove(Pkg, true); + } + } + bool const ret = EIPP::ReadResponse(solver_out, PM, Progress); + _error->MergeWithStack(); + if (ExecWait(solver_pid, solver)) + return ret; + return false; +} + /*}}}*/ +bool EIPP::WriteRequest(pkgDepCache &Cache, FileFd &output, /*{{{*/ + unsigned int const flags, + OpProgress * const Progress) +{ + if (Progress != NULL) + Progress->SubProgress(Cache.Head().PackageCount, _("Send request to planner")); + decltype(Cache.Head().PackageCount) p = 0; + string del, inst, reinst; + for (pkgCache::PkgIterator Pkg = Cache.PkgBegin(); Pkg.end() == false; ++Pkg, ++p) + { + if (Progress != NULL && p % 100 == 0) + Progress->Progress(p); + string* req; + pkgDepCache::StateCache &P = Cache[Pkg]; + if (P.Purge() == true && Pkg->CurrentState == pkgCache::State::ConfigFiles) + continue; + if (P.Delete() == true) + req = &del; + else if (P.NewInstall() == true || P.Upgrade() == true || P.Downgrade() == true) + req = &inst; + else if (P.ReInstall() == true) + req = &reinst; + else + continue; + req->append(" ").append(Pkg.FullName()); + } + + bool Okay = WriteGenericRequestHeaders(output, "Request: EIPP 0.1\n"); + if (del.empty() == false) + WriteOkay(Okay, output, "Remove:", del, "\n"); + if (inst.empty() == false) + WriteOkay(Okay, output, "Install:", inst, "\n"); + if (reinst.empty() == false) + WriteOkay(Okay, output, "ReInstall:", reinst, "\n"); + WriteOkay(Okay, output, "Planner: ", _config->Find("APT::Planner", "internal"), "\n"); + if ((flags & Request::IMMEDIATE_CONFIGURATION_ALL) != 0) + WriteOkay(Okay, output, "Immediate-Configuration: yes\n"); + else if ((flags & Request::NO_IMMEDIATE_CONFIGURATION) != 0) + WriteOkay(Okay, output, "Immediate-Configuration: no\n"); + else if ((flags & Request::ALLOW_TEMPORARY_REMOVE_OF_ESSENTIALS) != 0) + WriteOkay(Okay, output, "Allow-Temporary-Remove-of-Essentials: yes\n"); + return WriteOkay(Okay, output, "\n"); +} + /*}}}*/ +static bool WriteScenarioEIPPVersion(pkgDepCache &, FileFd &output, pkgCache::PkgIterator const &Pkg,/*{{{*/ + pkgCache::VerIterator const &Ver) +{ + bool Okay = true; + if (Pkg.CurrentVer() == Ver) + switch (Pkg->CurrentState) + { + case pkgCache::State::NotInstalled: WriteOkay(Okay, output, "\nStatus: not-installed"); break; + case pkgCache::State::ConfigFiles: WriteOkay(Okay, output, "\nStatus: config-files"); break; + case pkgCache::State::HalfInstalled: WriteOkay(Okay, output, "\nStatus: half-installed"); break; + case pkgCache::State::UnPacked: WriteOkay(Okay, output, "\nStatus: unpacked"); break; + case pkgCache::State::HalfConfigured: WriteOkay(Okay, output, "\nStatus: half-configured"); break; + case pkgCache::State::TriggersAwaited: WriteOkay(Okay, output, "\nStatus: triggers-awaited"); break; + case pkgCache::State::TriggersPending: WriteOkay(Okay, output, "\nStatus: triggers-pending"); break; + case pkgCache::State::Installed: WriteOkay(Okay, output, "\nStatus: installed"); break; + } + return Okay; +} + /*}}}*/ +// EIPP::WriteScenario - to the given file descriptor /*{{{*/ +template<typename forVersion> void forAllInterestingVersions(pkgDepCache &Cache, pkgCache::PkgIterator const &Pkg, forVersion const &func) +{ + if (Pkg->CurrentState == pkgCache::State::NotInstalled) + { + auto P = Cache[Pkg]; + if (P.Install() == false) + return; + func(Pkg, P.InstVerIter(Cache)); + } + else + { + if (Pkg->CurrentVer != 0) + func(Pkg, Pkg.CurrentVer()); + auto P = Cache[Pkg]; + auto const V = P.InstVerIter(Cache); + if (P.Delete() == false && Pkg.CurrentVer() != V) + func(Pkg, V); + } +} + +bool EIPP::WriteScenario(pkgDepCache &Cache, FileFd &output, OpProgress * const Progress) +{ + if (Progress != NULL) + Progress->SubProgress(Cache.Head().PackageCount, _("Send scenario to planner")); + decltype(Cache.Head().PackageCount) p = 0; + bool Okay = output.Failed() == false; + std::vector<bool> pkgset(Cache.Head().PackageCount, false); + auto const MarkVersion = [&](pkgCache::PkgIterator const &Pkg, pkgCache::VerIterator const &Ver) { + pkgset[Pkg->ID] = true; + for (auto D = Ver.DependsList(); D.end() == false; ++D) + { + if (D.IsCritical() == false) + continue; + auto const P = D.TargetPkg(); + for (auto Prv = P.ProvidesList(); Prv.end() == false; ++Prv) + { + auto const V = Prv.OwnerVer(); + auto const PV = V.ParentPkg(); + if (V == PV.CurrentVer() || V == Cache[PV].InstVerIter(Cache)) + pkgset[PV->ID] = true; + } + pkgset[P->ID] = true; + if (strcmp(P.Arch(), "any") == 0) + { + APT::StringView const pkgname(P.Name()); + auto const idxColon = pkgname.find(':'); + if (idxColon != APT::StringView::npos) + { + pkgCache::PkgIterator PA; + if (pkgname.substr(idxColon + 1) == "any") + { + auto const GA = Cache.FindGrp(pkgname.substr(0, idxColon).to_string()); + for (auto PA = GA.PackageList(); PA.end() == false; PA = GA.NextPkg(PA)) + { + pkgset[PA->ID] = true; + } + } + else + { + auto const PA = Cache.FindPkg(pkgname.to_string()); + if (PA.end() == false) + pkgset[PA->ID] = true; + } + } + } + else + { + auto const PA = Cache.FindPkg(P.FullName(false), "any"); + if (PA.end() == false) + pkgset[PA->ID] = true; + } + } + }; + for (pkgCache::PkgIterator Pkg = Cache.PkgBegin(); Pkg.end() == false; ++Pkg) + forAllInterestingVersions(Cache, Pkg, MarkVersion); + auto const WriteVersion = [&](pkgCache::PkgIterator const &Pkg, pkgCache::VerIterator const &Ver) { + Okay &= WriteScenarioVersion(output, Pkg, Ver); + Okay &= WriteScenarioEIPPVersion(Cache, output, Pkg, Ver); + Okay &= WriteScenarioLimitedDependency(output, Ver, pkgset, true); + WriteOkay(Okay, output, "\n"); + if (Progress != NULL && p % 100 == 0) + Progress->Progress(p); + }; + for (pkgCache::PkgIterator Pkg = Cache.PkgBegin(); Pkg.end() == false && likely(Okay); ++Pkg, ++p) + { + if (pkgset[Pkg->ID] == false || Pkg->VersionList == 0) + continue; + forAllInterestingVersions(Cache, Pkg, WriteVersion); + } + return Okay; +} + /*}}}*/ +// EIPP::ReadResponse - from the given file descriptor /*{{{*/ +bool EIPP::ReadResponse(int const input, pkgPackageManager * const PM, OpProgress *Progress) { + /* We build an map id to mmap offset here + In theory we could use the offset as ID, but then VersionCount + couldn't be used to create other versionmappings anymore and it + would be too easy for a (buggy) solver to segfault APT… */ + auto VersionCount = PM->Cache.Head().VersionCount; + decltype(VersionCount) VerIdx[VersionCount]; + for (pkgCache::PkgIterator P = PM->Cache.PkgBegin(); P.end() == false; ++P) { + for (pkgCache::VerIterator V = P.VersionList(); V.end() == false; ++V) + VerIdx[V->ID] = V.Index(); + } + + FileFd in; + in.OpenDescriptor(input, FileFd::ReadOnly); + pkgTagFile response(&in, 100); + pkgTagSection section; + + while (response.Step(section) == true) { + char const * type = nullptr; + if (section.Exists("Progress") == true) { + if (Progress != NULL) { + string msg = section.FindS("Message"); + if (msg.empty() == true) + msg = _("Prepare for receiving solution"); + Progress->SubProgress(100, msg, section.FindI("Percentage", 0)); + } + continue; + } else if (section.Exists("Error") == true) { + if (_error->PendingError()) { + if (Progress != nullptr) + Progress->Done(); + Progress = nullptr; + _error->DumpErrors(std::cerr, GlobalError::DEBUG, false); + } + std::string msg = SubstVar(SubstVar(section.FindS("Message"), "\n .\n", "\n\n"), "\n ", "\n"); + if (msg.empty() == true) { + msg = _("External planner failed without a proper error message"); + _error->Error("%s", msg.c_str()); + } else + _error->Error("External planner failed with: %s", msg.substr(0,msg.find('\n')).c_str()); + if (Progress != nullptr) + Progress->Done(); + std::cerr << "The planner encountered an error of type: " << section.FindS("Error") << std::endl; + std::cerr << "The following information might help you to understand what is wrong:" << std::endl; + std::cerr << msg << std::endl << std::endl; + return false; + } else if (section.Exists("Unpack") == true) + type = "Unpack"; + else if (section.Exists("Configure") == true) + type = "Configure"; + else if (section.Exists("Remove") == true) + type = "Remove"; + else { + char const *Start, *End; + section.GetSection(Start, End); + _error->Warning("Encountered an unexpected section with %d fields: %s", section.Count(), std::string(Start, End).c_str()); + continue; + } + + if (type == nullptr) + continue; + decltype(VersionCount) const id = section.FindULL(type, VersionCount); + if (id == VersionCount) { + _error->Warning("Unable to parse %s request with id value '%s'!", type, section.FindS(type).c_str()); + continue; + } else if (id > VersionCount) { + _error->Warning("ID value '%s' in %s request stanza is to high to refer to a known version!", section.FindS(type).c_str(), type); + continue; + } + + pkgCache::VerIterator Ver(PM->Cache.GetCache(), PM->Cache.GetCache().VerP + VerIdx[id]); + auto const Pkg = Ver.ParentPkg(); + if (strcmp(type, "Unpack") == 0) + PM->Install(Pkg, PM->FileNames[Pkg->ID]); + else if (strcmp(type, "Configure") == 0) + PM->Configure(Pkg); + else if (strcmp(type, "Remove") == 0) + PM->Remove(Pkg, PM->Cache[Pkg].Purge()); + } + return in.Failed() == false; +} + /*}}}*/ +bool EIPP::ReadRequest(int const input, std::list<std::pair<std::string,PKG_ACTION>> &actions,/*{{{*/ + unsigned int &flags) +{ + actions.clear(); + flags = 0; + std::string line; + while (ReadLine(input, line) == true) + { + // Skip empty lines before request + if (line.empty() == true) + continue; + // The first Tag must be a request, so search for it + if (line.compare(0, 8, "Request:") != 0) + continue; + + while (ReadLine(input, line) == true) + { + // empty lines are the end of the request + if (line.empty() == true) + return true; + + PKG_ACTION pkgact = PKG_ACTION::NOOP; + if (LineStartsWithAndStrip(line, "Install:")) + pkgact = PKG_ACTION::INSTALL; + else if (LineStartsWithAndStrip(line, "ReInstall:")) + pkgact = PKG_ACTION::REINSTALL; + else if (LineStartsWithAndStrip(line, "Remove:")) + pkgact = PKG_ACTION::REMOVE; + else if (LineStartsWithAndStrip(line, "Architecture:")) + _config->Set("APT::Architecture", line); + else if (LineStartsWithAndStrip(line, "Architectures:")) + _config->Set("APT::Architectures", SubstVar(line, " ", ",")); + else if (LineStartsWithAndStrip(line, "Planner:")) + ; // purely informational line + else if (LineStartsWithAndStrip(line, "Immediate-Configuration:")) + { + if (localStringToBool(line, true)) + flags |= Request::IMMEDIATE_CONFIGURATION_ALL; + else + flags |= Request::NO_IMMEDIATE_CONFIGURATION; + } + else if (ReadFlag(flags, line, "Allow-Temporary-Remove-of-Essentials:", Request::ALLOW_TEMPORARY_REMOVE_OF_ESSENTIALS)) + ; + else + _error->Warning("Unknown line in EIPP Request stanza: %s", line.c_str()); + + if (pkgact == PKG_ACTION::NOOP) + continue; + for (auto && p: VectorizeString(line, ' ')) + actions.emplace_back(std::move(p), pkgact); + } + } + return false; +} + /*}}}*/ +bool EIPP::ApplyRequest(std::list<std::pair<std::string,PKG_ACTION>> &actions,/*{{{*/ + pkgDepCache &Cache) +{ + for (auto Pkg = Cache.PkgBegin(); Pkg.end() == false; ++Pkg) + { + short versions = 0; + for (auto Ver = Pkg.VersionList(); Ver.end() == false; ++Ver) + { + ++versions; + if (Pkg.CurrentVer() == Ver) + continue; + Cache.SetCandidateVersion(Ver); + } + if (unlikely(versions > 2)) + _error->Warning("Package %s has %d versions, but should have at most 2!", Pkg.FullName().c_str(), versions); + } + for (auto && a: actions) + { + pkgCache::PkgIterator P = Cache.FindPkg(a.first); + if (P.end() == true) + { + _error->Warning("Package %s is not known, so can't be acted on", a.first.c_str()); + continue; + } + switch (a.second) + { + case PKG_ACTION::NOOP: + _error->Warning("Package %s has NOOP as action?!?", a.first.c_str()); + break; + case PKG_ACTION::INSTALL: + Cache.MarkInstall(P, false); + break; + case PKG_ACTION::REINSTALL: + Cache.MarkInstall(P, false); + Cache.SetReInstall(P, true); + break; + case PKG_ACTION::REMOVE: + Cache.MarkDelete(P); + break; + } + } + return true; +} + /*}}}*/ |