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 #include <apt-pkg/configuration.h>
  24 #include <apt-pkg/depcache.h>
  25 #include <apt-pkg/pkgcache.h>
  26 #include <apt-pkg/cacheiterators.h>
  27
  28 #include <string.h>
  29 #include <iostream>
  30 #include <list>
  31 #include <string>
  32 #include <unistd.h>
  33 #include <cstdio>
  34 #include <stdlib.h>
  35
  36 #include <apti18n.h>
  37                                                                         /*}}}*/
  38
  39 // ShowHelp - Show a help screen                                        /*{{{*/
  40 // ---------------------------------------------------------------------
  41 /* */
  42 static bool ShowHelp(CommandLine &) {
  43         ioprintf(std::cout,_("%s %s for %s compiled on %s %s\n"),PACKAGE,PACKAGE_VERSION,
  44                  COMMON_ARCH,__DATE__,__TIME__);
  45
  46         std::cout <<
  47                 _("Usage: apt-internal-solver\n"
  48                 "\n"
  49                 "apt-internal-solver is an interface to use the current internal\n"
  50                 "like an external resolver for the APT family for debugging or alike\n"
  51                 "\n"
  52                 "Options:\n"
  53                 "  -h  This help text.\n"
  54                 "  -q  Loggable output - no progress indicator\n"
  55                 "  -c=? Read this configuration file\n"
  56                 "  -o=? Set an arbitrary configuration option, eg -o dir::cache=/tmp\n");
  57         return true;
  58 }
  59                                                                         /*}}}*/
  60 APT_NORETURN static void DIE(std::string const &message) {              /*{{{*/
  61         std::cerr << "ERROR: " << message << std::endl;
  62         _error->DumpErrors(std::cerr);
  63         exit(EXIT_FAILURE);
  64 }
  65                                                                         /*}}}*/
  66 int main(int argc,const char *argv[])                                   /*{{{*/
  67 {
  68         CommandLine::Args Args[] = {
  69                 {'h',"help","help",0},
  70                 {'v',"version","version",0},
  71                 {'q',"quiet","quiet",CommandLine::IntLevel},
  72                 {'q',"silent","quiet",CommandLine::IntLevel},
  73                 {'c',"config-file",0,CommandLine::ConfigFile},
  74                 {'o',"option",0,CommandLine::ArbItem},
  75                 {0,0,0,0}};
  76
  77         CommandLine CmdL(Args,_config);
  78         if (pkgInitConfig(*_config) == false ||
  79             CmdL.Parse(argc,argv) == false) {
  80                 _error->DumpErrors();
  81                 return 2;
  82         }
  83
  84         // See if the help should be shown
  85         if (_config->FindB("help") == true ||
  86             _config->FindB("version") == true) {
  87                 ShowHelp(CmdL);
  88                 return 1;
  89         }
  90
  91         if (CmdL.FileList[0] != 0 && strcmp(CmdL.FileList[0], "scenario") == 0)
  92         {
  93                 if (pkgInitSystem(*_config,_system) == false) {
  94                         std::cerr << "System could not be initialized!" << std::endl;
  95                         return 1;
  96                 }
  97                 pkgCacheFile CacheFile;
  98                 CacheFile.Open(NULL, false);
  99                 APT::PackageSet pkgset = APT::PackageSet::FromCommandLine(CacheFile, CmdL.FileList + 1);
 100                 FILE* output = stdout;
 101                 if (pkgset.empty() == true)
 102                         EDSP::WriteScenario(CacheFile, output);
 103                 else
 104                         EDSP::WriteLimitedScenario(CacheFile, output, pkgset);
 105                 fclose(output);
 106                 _error->DumpErrors(std::cerr);
 107                 return 0;
 108         }
 109
 110         // Deal with stdout not being a tty
 111         if (!isatty(STDOUT_FILENO) && _config->FindI("quiet", -1) == -1)
 112                 _config->Set("quiet","1");
 113
 114         if (_config->FindI("quiet", 0) < 1)
 115                 _config->Set("Debug::EDSP::WriteSolution", true);
 116
 117         _config->Set("APT::Solver", "internal");
 118         _config->Set("edsp::scenario", "stdin");
 119         int input = STDIN_FILENO;
 120         FILE* output = stdout;
 121         SetNonBlock(input, false);
 122
 123         EDSP::WriteProgress(0, "Start up solver…", output);
 124
 125         if (pkgInitSystem(*_config,_system) == false)
 126                 DIE("System could not be initialized!");
 127
 128         EDSP::WriteProgress(1, "Read request…", output);
 129
 130         if (WaitFd(input, false, 5) == false)
 131                 DIE("WAIT timed out in the resolver");
 132
 133         std::list<std::string> install, remove;
 134         bool upgrade, distUpgrade, autoRemove;
 135         if (EDSP::ReadRequest(input, install, remove, upgrade, distUpgrade, autoRemove) == false)
 136                 DIE("Parsing the request failed!");
 137
 138         EDSP::WriteProgress(5, "Read scenario…", output);
 139
 140         pkgCacheFile CacheFile;
 141         if (CacheFile.Open(NULL, false) == false)
 142                 DIE("Failed to open CacheFile!");
 143
 144         EDSP::WriteProgress(50, "Apply request on scenario…", output);
 145
 146         if (EDSP::ApplyRequest(install, remove, CacheFile) == false)
 147                 DIE("Failed to apply request to depcache!");
 148
 149         pkgProblemResolver Fix(CacheFile);
 150         for (std::list<std::string>::const_iterator i = remove.begin();
 151              i != remove.end(); ++i) {
 152                 pkgCache::PkgIterator P = CacheFile->FindPkg(*i);
 153                 Fix.Clear(P);
 154                 Fix.Protect(P);
 155                 Fix.Remove(P);
 156         }
 157
 158         for (std::list<std::string>::const_iterator i = install.begin();
 159              i != install.end(); ++i) {
 160                 pkgCache::PkgIterator P = CacheFile->FindPkg(*i);
 161                 Fix.Clear(P);
 162                 Fix.Protect(P);
 163         }
 164
 165         for (std::list<std::string>::const_iterator i = install.begin();
 166              i != install.end(); ++i)
 167                 CacheFile->MarkInstall(CacheFile->FindPkg(*i), true);
 168
 169         EDSP::WriteProgress(60, "Call problemresolver on current scenario…", output);
 170
 171         if (upgrade == true) {
 172                 if (pkgAllUpgrade(CacheFile) == false) {
 173                         EDSP::WriteError("ERR_UNSOLVABLE_UPGRADE", "An upgrade error occurred", output);
 174                         return 0;
 175                 }
 176         } else if (distUpgrade == true) {
 177                 if (pkgDistUpgrade(CacheFile) == false) {
 178                         EDSP::WriteError("ERR_UNSOLVABLE_DIST_UPGRADE", "An dist-upgrade error occurred", output);
 179                         return 0;
 180                 }
 181         } else if (Fix.Resolve() == false) {
 182                 EDSP::WriteError("ERR_UNSOLVABLE", "An error occurred", output);
 183                 return 0;
 184         }
 185
 186         EDSP::WriteProgress(95, "Write solution…", output);
 187
 188         if (EDSP::WriteSolution(CacheFile, output) == false)
 189                 DIE("Failed to output the solution!");
 190
 191         EDSP::WriteProgress(100, "Done", output);
 192
 193         bool const Errors = _error->PendingError();
 194         if (_config->FindI("quiet",0) > 0)
 195                 _error->DumpErrors(std::cerr);
 196         else
 197                 _error->DumpErrors(std::cerr, GlobalError::DEBUG);
 198         return Errors == true ? 100 : 0;
 199 }
 200                                                                         /*}}}*/