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