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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, {});
}
/*}}}*/
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