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