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-resolver\n"
  38                 "\n"
  39                 "apt-internal-resolver 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                 "apt.conf(5) manual pages for more information and options.\n"
  48                 "                       This APT has Super Cow Powers.\n");
  49         return true;
  50 }
  51                                                                         /*}}}*/
  52 int main(int argc,const char *argv[])                                   /*{{{*/
  53 {
  54         CommandLine::Args Args[] = {
  55                 {'h',"help","help",0},
  56                 {'v',"version","version",0},
  57                 {'q',"quiet","quiet",CommandLine::IntLevel},
  58                 {'q',"silent","quiet",CommandLine::IntLevel},
  59                 {'c',"config-file",0,CommandLine::ConfigFile},
  60                 {'o',"option",0,CommandLine::ArbItem},
  61                 {0,0,0,0}};
  62
  63         CommandLine CmdL(Args,_config);
  64         if (pkgInitConfig(*_config) == false ||
  65             CmdL.Parse(argc,argv) == false) {
  66                 _error->DumpErrors();
  67                 return 2;
  68         }
  69
  70         // See if the help should be shown
  71         if (_config->FindB("help") == true ||
  72             _config->FindB("version") == true) {
  73                 ShowHelp(CmdL);
  74                 return 1;
  75         }
  76
  77         if (CmdL.FileList[0] != 0 && strcmp(CmdL.FileList[0], "scenario") == 0)
  78         {
  79                 if (pkgInitSystem(*_config,_system) == false) {
  80                         std::cerr << "System could not be initialized!" << std::endl;
  81                         return 1;
  82                 }
  83                 pkgCacheFile CacheFile;
  84                 CacheFile.Open(NULL, false);
  85                 APT::PackageSet pkgset = APT::PackageSet::FromCommandLine(CacheFile, CmdL.FileList + 1);
  86                 FILE* output = stdout;
  87                 if (pkgset.empty() == true)
  88                         EDSP::WriteScenario(CacheFile, output);
  89                 else
  90                         EDSP::WriteLimitedScenario(CacheFile, output, pkgset);
  91                 fclose(output);
  92                 _error->DumpErrors(std::cerr);
  93                 return 0;
  94         }
  95
  96         // Deal with stdout not being a tty
  97         if (!isatty(STDOUT_FILENO) && _config->FindI("quiet", -1) == -1)
  98                 _config->Set("quiet","1");
  99
 100         if (_config->FindI("quiet", 0) < 1)
 101                 _config->Set("Debug::EDSP::WriteSolution", true);
 102
 103         _config->Set("APT::Solver", "internal");
 104         _config->Set("edsp::scenario", "stdin");
 105         int input = STDIN_FILENO;
 106         FILE* output = stdout;
 107         SetNonBlock(input, false);
 108
 109         EDSP::WriteProgress(0, "Start up solver…", output);
 110
 111         if (pkgInitSystem(*_config,_system) == false) {
 112                 std::cerr << "System could not be initialized!" << std::endl;
 113                 return 1;
 114         }
 115
 116         EDSP::WriteProgress(1, "Read request…", output);
 117
 118         if (WaitFd(input, false, 5) == false)
 119                 std::cerr << "WAIT timed out in the resolver" << std::endl;
 120
 121         std::list<std::string> install, remove;
 122         bool upgrade, distUpgrade, autoRemove;
 123         if (EDSP::ReadRequest(input, install, remove, upgrade, distUpgrade, autoRemove) == false) {
 124                 std::cerr << "Parsing the request failed!" << std::endl;
 125                 return 2;
 126         }
 127
 128         EDSP::WriteProgress(5, "Read scenario…", output);
 129
 130         pkgCacheFile CacheFile;
 131         CacheFile.Open(NULL, false);
 132
 133         EDSP::WriteProgress(50, "Apply request on scenario…", output);
 134
 135         if (EDSP::ApplyRequest(install, remove, CacheFile) == false) {
 136                 std::cerr << "Failed to apply request to depcache!" << std::endl;
 137                 return 3;
 138         }
 139
 140         pkgProblemResolver Fix(CacheFile);
 141         for (std::list<std::string>::const_iterator i = remove.begin();
 142              i != remove.end(); ++i) {
 143                 pkgCache::PkgIterator P = CacheFile->FindPkg(*i);
 144                 Fix.Clear(P);
 145                 Fix.Protect(P);
 146                 Fix.Remove(P);
 147         }
 148
 149         for (std::list<std::string>::const_iterator i = install.begin();
 150              i != install.end(); ++i) {
 151                 pkgCache::PkgIterator P = CacheFile->FindPkg(*i);
 152                 Fix.Clear(P);
 153                 Fix.Protect(P);
 154         }
 155
 156         for (std::list<std::string>::const_iterator i = install.begin();
 157              i != install.end(); ++i)
 158                 CacheFile->MarkInstall(CacheFile->FindPkg(*i), true);
 159
 160         EDSP::WriteProgress(60, "Call problemresolver on current scenario…", output);
 161
 162         if (upgrade == true) {
 163                 if (pkgAllUpgrade(CacheFile) == false) {
 164                         EDSP::WriteError("ERR_UNSOLVABLE_UPGRADE", "An upgrade error occured", output);
 165                         return 0;
 166                 }
 167         } else if (distUpgrade == true) {
 168                 if (pkgDistUpgrade(CacheFile) == false) {
 169                         EDSP::WriteError("ERR_UNSOLVABLE_DIST_UPGRADE", "An dist-upgrade error occured", output);
 170                         return 0;
 171                 }
 172         } else if (Fix.Resolve() == false) {
 173                 EDSP::WriteError("ERR_UNSOLVABLE", "An error occured", output);
 174                 return 0;
 175         }
 176
 177         EDSP::WriteProgress(95, "Write solution…", output);
 178
 179         if (EDSP::WriteSolution(CacheFile, output) == false) {
 180                 std::cerr << "Failed to output the solution!" << std::endl;
 181                 return 4;
 182         }
 183
 184         EDSP::WriteProgress(100, "Done", output);
 185
 186         bool const Errors = _error->PendingError();
 187         if (_config->FindI("quiet",0) > 0)
 188                 _error->DumpErrors(std::cerr);
 189         else
 190                 _error->DumpErrors(std::cerr, GlobalError::DEBUG);
 191         return Errors == true ? 100 : 0;
 192 }
 193                                                                         /*}}}*/