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-rw-r--r--cmdline/apt-internal-solver.cc214
1 files changed, 214 insertions, 0 deletions
diff --git a/cmdline/apt-internal-solver.cc b/cmdline/apt-internal-solver.cc
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+++ b/cmdline/apt-internal-solver.cc
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+// -*- mode: cpp; mode: fold -*-
+// Description /*{{{*/
+/* #####################################################################
+
+ cover around the internal solver to be able to run it like an external
+
+ ##################################################################### */
+ /*}}}*/
+// Include Files /*{{{*/
+#include <config.h>
+
+#include <apt-pkg/algorithms.h>
+#include <apt-pkg/cachefile.h>
+#include <apt-pkg/cacheset.h>
+#include <apt-pkg/cmndline.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/depcache.h>
+#include <apt-pkg/edsp.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/init.h>
+#include <apt-pkg/pkgcache.h>
+#include <apt-pkg/pkgsystem.h>
+#include <apt-pkg/strutl.h>
+#include <apt-pkg/upgrade.h>
+
+#include <apt-private/private-cmndline.h>
+#include <apt-private/private-main.h>
+#include <apt-private/private-output.h>
+
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <iostream>
+#include <list>
+#include <sstream>
+#include <string>
+#include <unistd.h>
+
+#include <apti18n.h>
+ /*}}}*/
+
+static bool ShowHelp(CommandLine &) /*{{{*/
+{
+ std::cout <<
+ _("Usage: apt-internal-solver\n"
+ "\n"
+ "apt-internal-solver is an interface to use the current internal\n"
+ "resolver for the APT family like an external one, for debugging or\n"
+ "the like.\n");
+ return true;
+}
+ /*}}}*/
+APT_NORETURN static void DIE(std::string const &message) { /*{{{*/
+ std::cerr << "ERROR: " << message << std::endl;
+ _error->DumpErrors(std::cerr);
+ exit(EXIT_FAILURE);
+}
+ /*}}}*/
+static std::vector<aptDispatchWithHelp> GetCommands() /*{{{*/
+{
+ return {};
+}
+ /*}}}*/
+static bool WriteSolution(pkgDepCache &Cache, FileFd &output) /*{{{*/
+{
+ bool Okay = output.Failed() == false;
+ for (pkgCache::PkgIterator Pkg = Cache.PkgBegin(); Pkg.end() == false && likely(Okay); ++Pkg)
+ {
+ if (Cache[Pkg].Delete() == true)
+ Okay &= EDSP::WriteSolutionStanza(output, "Remove", Pkg.CurrentVer());
+ else if (Cache[Pkg].NewInstall() == true || Cache[Pkg].Upgrade() == true)
+ Okay &= EDSP::WriteSolutionStanza(output, "Install", Cache.GetCandidateVersion(Pkg));
+ else if (Cache[Pkg].Garbage == true)
+ Okay &= EDSP::WriteSolutionStanza(output, "Autoremove", Pkg.CurrentVer());
+ }
+ return Okay;
+}
+ /*}}}*/
+int main(int argc,const char *argv[]) /*{{{*/
+{
+ // we really don't need anything
+ DropPrivileges();
+
+ CommandLine CmdL;
+ ParseCommandLine(CmdL, APT_CMD::APT_INTERNAL_SOLVER, &_config, NULL, argc, argv, &ShowHelp, &GetCommands);
+
+ if (CmdL.FileList[0] != 0 && strcmp(CmdL.FileList[0], "scenario") == 0)
+ {
+ if (pkgInitSystem(*_config,_system) == false) {
+ std::cerr << "System could not be initialized!" << std::endl;
+ return 1;
+ }
+ pkgCacheFile CacheFile;
+ CacheFile.Open(NULL, false);
+ APT::PackageSet pkgset = APT::PackageSet::FromCommandLine(CacheFile, CmdL.FileList + 1);
+ FileFd output;
+ if (output.OpenDescriptor(STDOUT_FILENO, FileFd::WriteOnly | FileFd::BufferedWrite, true) == false)
+ return 2;
+ if (pkgset.empty() == true)
+ EDSP::WriteScenario(CacheFile, output);
+ else
+ {
+ std::vector<bool> pkgvec(CacheFile->Head().PackageCount, false);
+ for (auto const &p: pkgset)
+ pkgvec[p->ID] = true;
+ EDSP::WriteLimitedScenario(CacheFile, output, pkgvec);
+ }
+ output.Close();
+ _error->DumpErrors(std::cerr);
+ return 0;
+ }
+
+ // Deal with stdout not being a tty
+ if (!isatty(STDOUT_FILENO) && _config->FindI("quiet", -1) == -1)
+ _config->Set("quiet","1");
+
+ if (_config->FindI("quiet", 0) < 1)
+ _config->Set("Debug::EDSP::WriteSolution", true);
+
+ _config->Set("APT::System", "Debian APT solver interface");
+ _config->Set("APT::Solver", "internal");
+ _config->Set("edsp::scenario", "/nonexistent/stdin");
+ _config->Clear("Dir::Log");
+ FileFd output;
+ if (output.OpenDescriptor(STDOUT_FILENO, FileFd::WriteOnly | FileFd::BufferedWrite, true) == false)
+ DIE("stdout couldn't be opened");
+ int const input = STDIN_FILENO;
+ SetNonBlock(input, false);
+
+ EDSP::WriteProgress(0, "Start up solver…", output);
+
+ if (pkgInitSystem(*_config,_system) == false)
+ DIE("System could not be initialized!");
+
+ EDSP::WriteProgress(1, "Read request…", output);
+
+ if (WaitFd(input, false, 5) == false)
+ DIE("WAIT timed out in the resolver");
+
+ std::list<std::string> install, remove;
+ unsigned int flags;
+ if (EDSP::ReadRequest(input, install, remove, flags) == false)
+ DIE("Parsing the request failed!");
+
+ EDSP::WriteProgress(5, "Read scenario…", output);
+
+ pkgCacheFile CacheFile;
+ CacheFile.InhibitActionGroups(true);
+ if (CacheFile.Open(NULL, false) == false)
+ DIE("Failed to open CacheFile!");
+
+ EDSP::WriteProgress(50, "Apply request on scenario…", output);
+
+ if (EDSP::ApplyRequest(install, remove, CacheFile) == false)
+ DIE("Failed to apply request to depcache!");
+
+ pkgProblemResolver Fix(CacheFile);
+ for (std::list<std::string>::const_iterator i = remove.begin();
+ i != remove.end(); ++i) {
+ pkgCache::PkgIterator P = CacheFile->FindPkg(*i);
+ Fix.Clear(P);
+ Fix.Protect(P);
+ Fix.Remove(P);
+ }
+
+ for (std::list<std::string>::const_iterator i = install.begin();
+ i != install.end(); ++i) {
+ pkgCache::PkgIterator P = CacheFile->FindPkg(*i);
+ Fix.Clear(P);
+ Fix.Protect(P);
+ }
+
+ for (std::list<std::string>::const_iterator i = install.begin();
+ i != install.end(); ++i)
+ CacheFile->MarkInstall(CacheFile->FindPkg(*i), true);
+
+ EDSP::WriteProgress(60, "Call problemresolver on current scenario…", output);
+
+ std::string failure;
+ if (flags & EDSP::Request::UPGRADE_ALL) {
+ int upgrade_flags = APT::Upgrade::ALLOW_EVERYTHING;
+ if (flags & EDSP::Request::FORBID_NEW_INSTALL)
+ upgrade_flags |= APT::Upgrade::FORBID_INSTALL_NEW_PACKAGES;
+ if (flags & EDSP::Request::FORBID_REMOVE)
+ upgrade_flags |= APT::Upgrade::FORBID_REMOVE_PACKAGES;
+
+ if (APT::Upgrade::Upgrade(CacheFile, upgrade_flags))
+ ;
+ else if (upgrade_flags == APT::Upgrade::ALLOW_EVERYTHING)
+ failure = "ERR_UNSOLVABLE_FULL_UPGRADE";
+ else
+ failure = "ERR_UNSOLVABLE_UPGRADE";
+ } else if (Fix.Resolve() == false)
+ failure = "ERR_UNSOLVABLE";
+
+ if (failure.empty() == false) {
+ std::ostringstream broken;
+ ShowBroken(broken, CacheFile, false);
+ EDSP::WriteError(failure.c_str(), broken.str(), output);
+ return 0;
+ }
+
+ EDSP::WriteProgress(95, "Write solution…", output);
+
+ CacheFile->MarkAndSweep();
+ if (WriteSolution(CacheFile, output) == false)
+ DIE("Failed to output the solution!");
+
+ EDSP::WriteProgress(100, "Done", output);
+
+ return DispatchCommandLine(CmdL, {});
+}
+ /*}}}*/