cmdline/apt-internal-solver.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 /* #####################################################################
   4
   5    cover around the internal solver to be able to run it like an external
   6
   7    ##################################################################### */
   8                                                                         /*}}}*/
   9 // Include Files                                                        /*{{{*/
  10 #include <config.h>
  11
  12 #include <apt-pkg/error.h>
  13 #include <apt-pkg/cmndline.h>
  14 #include <apt-pkg/init.h>
  15 #include <apt-pkg/cachefile.h>
  16 #include <apt-pkg/cacheset.h>
  17 #include <apt-pkg/strutl.h>
  18 #include <apt-pkg/edsp.h>
  19 #include <apt-pkg/algorithms.h>
  20 #include <apt-pkg/fileutl.h>
  21 #include <apt-pkg/pkgsystem.h>
  22 #include <apt-pkg/upgrade.h>
  23
  24 #include <unistd.h>
  25 #include <cstdio>
  26
  27 #include <apti18n.h>
  28                                                                         /*}}}*/
  29
  30 // ShowHelp - Show a help screen                                        /*{{{*/
  31 // ---------------------------------------------------------------------
  32 /* */
  33 bool ShowHelp(CommandLine &CmdL) {
  34         ioprintf(std::cout,_("%s %s for %s compiled on %s %s\n"),PACKAGE,PACKAGE_VERSION,
  35                  COMMON_ARCH,__DATE__,__TIME__);
  36
  37         std::cout <<
  38                 _("Usage: apt-internal-solver\n"
  39                 "\n"
  40                 "apt-internal-solver is an interface to use the current internal\n"
  41                 "like an external resolver for the APT family for debugging or alike\n"
  42                 "\n"
  43                 "Options:\n"
  44                 "  -h  This help text.\n"
  45                 "  -q  Loggable output - no progress indicator\n"
  46                 "  -c=? Read this configuration file\n"
  47                 "  -o=? Set an arbitrary configuration option, eg -o dir::cache=/tmp\n");
  48         return true;
  49 }
  50                                                                         /*}}}*/
  51 int main(int argc,const char *argv[])                                   /*{{{*/
  52 {
  53         CommandLine::Args Args[] = {
  54                 {'h',"help","help",0},
  55                 {'v',"version","version",0},
  56                 {'q',"quiet","quiet",CommandLine::IntLevel},
  57                 {'q',"silent","quiet",CommandLine::IntLevel},
  58                 {'c',"config-file",0,CommandLine::ConfigFile},
  59                 {'o',"option",0,CommandLine::ArbItem},
  60                 {0,0,0,0}};
  61
  62         CommandLine CmdL(Args,_config);
  63         if (pkgInitConfig(*_config) == false ||
  64             CmdL.Parse(argc,argv) == false) {
  65                 _error->DumpErrors();
  66                 return 2;
  67         }
  68
  69         // See if the help should be shown
  70         if (_config->FindB("help") == true ||
  71             _config->FindB("version") == true) {
  72                 ShowHelp(CmdL);
  73                 return 1;
  74         }
  75
  76         if (CmdL.FileList[0] != 0 && strcmp(CmdL.FileList[0], "scenario") == 0)
  77         {
  78                 if (pkgInitSystem(*_config,_system) == false) {
  79                         std::cerr << "System could not be initialized!" << std::endl;
  80                         return 1;
  81                 }
  82                 pkgCacheFile CacheFile;
  83                 CacheFile.Open(NULL, false);
  84                 APT::PackageSet pkgset = APT::PackageSet::FromCommandLine(CacheFile, CmdL.FileList + 1);
  85                 FILE* output = stdout;
  86                 if (pkgset.empty() == true)
  87                         EDSP::WriteScenario(CacheFile, output);
  88                 else
  89                         EDSP::WriteLimitedScenario(CacheFile, output, pkgset);
  90                 fclose(output);
  91                 _error->DumpErrors(std::cerr);
  92                 return 0;
  93         }
  94
  95         // Deal with stdout not being a tty
  96         if (!isatty(STDOUT_FILENO) && _config->FindI("quiet", -1) == -1)
  97                 _config->Set("quiet","1");
  98
  99         if (_config->FindI("quiet", 0) < 1)
 100                 _config->Set("Debug::EDSP::WriteSolution", true);
 101
 102         _config->Set("APT::Solver", "internal");
 103         _config->Set("edsp::scenario", "stdin");
 104         int input = STDIN_FILENO;
 105         FILE* output = stdout;
 106         SetNonBlock(input, false);
 107
 108         EDSP::WriteProgress(0, "Start up solver…", output);
 109
 110         if (pkgInitSystem(*_config,_system) == false) {
 111                 std::cerr << "System could not be initialized!" << std::endl;
 112                 return 1;
 113         }
 114
 115         EDSP::WriteProgress(1, "Read request…", output);
 116
 117         if (WaitFd(input, false, 5) == false)
 118                 std::cerr << "WAIT timed out in the resolver" << std::endl;
 119
 120         std::list<std::string> install, remove;
 121         bool upgrade, distUpgrade, autoRemove;
 122         if (EDSP::ReadRequest(input, install, remove, upgrade, distUpgrade, autoRemove) == false) {
 123                 std::cerr << "Parsing the request failed!" << std::endl;
 124                 return 2;
 125         }
 126
 127         EDSP::WriteProgress(5, "Read scenario…", output);
 128
 129         pkgCacheFile CacheFile;
 130         CacheFile.Open(NULL, false);
 131
 132         EDSP::WriteProgress(50, "Apply request on scenario…", output);
 133
 134         if (EDSP::ApplyRequest(install, remove, CacheFile) == false) {
 135                 std::cerr << "Failed to apply request to depcache!" << std::endl;
 136                 return 3;
 137         }
 138
 139         pkgProblemResolver Fix(CacheFile);
 140         for (std::list<std::string>::const_iterator i = remove.begin();
 141              i != remove.end(); ++i) {
 142                 pkgCache::PkgIterator P = CacheFile->FindPkg(*i);
 143                 Fix.Clear(P);
 144                 Fix.Protect(P);
 145                 Fix.Remove(P);
 146         }
 147
 148         for (std::list<std::string>::const_iterator i = install.begin();
 149              i != install.end(); ++i) {
 150                 pkgCache::PkgIterator P = CacheFile->FindPkg(*i);
 151                 Fix.Clear(P);
 152                 Fix.Protect(P);
 153         }
 154
 155         for (std::list<std::string>::const_iterator i = install.begin();
 156              i != install.end(); ++i)
 157                 CacheFile->MarkInstall(CacheFile->FindPkg(*i), true);
 158
 159         EDSP::WriteProgress(60, "Call problemresolver on current scenario…", output);
 160
 161         if (upgrade == true) {
 162                 if (pkgAllUpgrade(CacheFile) == false) {
 163                         EDSP::WriteError("ERR_UNSOLVABLE_UPGRADE", "An upgrade error occurred", output);
 164                         return 0;
 165                 }
 166         } else if (distUpgrade == true) {
 167                 if (pkgDistUpgrade(CacheFile) == false) {
 168                         EDSP::WriteError("ERR_UNSOLVABLE_DIST_UPGRADE", "An dist-upgrade error occurred", output);
 169                         return 0;
 170                 }
 171         } else if (Fix.Resolve() == false) {
 172                 EDSP::WriteError("ERR_UNSOLVABLE", "An error occurred", output);
 173                 return 0;
 174         }
 175
 176         EDSP::WriteProgress(95, "Write solution…", output);
 177
 178         if (EDSP::WriteSolution(CacheFile, output) == false) {
 179                 std::cerr << "Failed to output the solution!" << std::endl;
 180                 return 4;
 181         }
 182
 183         EDSP::WriteProgress(100, "Done", output);
 184
 185         bool const Errors = _error->PendingError();
 186         if (_config->FindI("quiet",0) > 0)
 187                 _error->DumpErrors(std::cerr);
 188         else
 189                 _error->DumpErrors(std::cerr, GlobalError::DEBUG);
 190         return Errors == true ? 100 : 0;
 191 }
 192                                                                         /*}}}*/