apt-private/private-source.cc

   1 // Include Files                                                        /*{{{*/
   2 #include <config.h>
   3
   4 #include <apt-pkg/acquire-item.h>
   5 #include <apt-pkg/acquire.h>
   6 #include <apt-pkg/algorithms.h>
   7 #include <apt-pkg/aptconfiguration.h>
   8 #include <apt-pkg/cachefile.h>
   9 #include <apt-pkg/cacheiterators.h>
  10 #include <apt-pkg/cacheset.h>
  11 #include <apt-pkg/cmndline.h>
  12 #include <apt-pkg/configuration.h>
  13 #include <apt-pkg/depcache.h>
  14 #include <apt-pkg/error.h>
  15 #include <apt-pkg/fileutl.h>
  16 #include <apt-pkg/hashes.h>
  17 #include <apt-pkg/indexfile.h>
  18 #include <apt-pkg/metaindex.h>
  19 #include <apt-pkg/pkgcache.h>
  20 #include <apt-pkg/sourcelist.h>
  21 #include <apt-pkg/srcrecords.h>
  22 #include <apt-pkg/strutl.h>
  23 #include <apt-pkg/version.h>
  24
  25 #include <apt-private/private-cachefile.h>
  26 #include <apt-private/private-cacheset.h>
  27 #include <apt-private/private-download.h>
  28 #include <apt-private/private-install.h>
  29 #include <apt-private/private-source.h>
  30
  31 #include <stddef.h>
  32 #include <stdio.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35 #include <sys/stat.h>
  36 #include <unistd.h>
  37
  38 #include <iostream>
  39 #include <set>
  40 #include <string>
  41 #include <vector>
  42
  43 #include <apti18n.h>
  44                                                                         /*}}}*/
  45
  46 // TryToInstallBuildDep - Try to install a single package               /*{{{*/
  47 // ---------------------------------------------------------------------
  48 /* This used to be inlined in DoInstall, but with the advent of regex package
  49    name matching it was split out.. */
  50 static bool TryToInstallBuildDep(pkgCache::PkgIterator Pkg,pkgCacheFile &Cache,
  51                   pkgProblemResolver &Fix,bool Remove,bool BrokenFix,
  52                   bool AllowFail = true)
  53 {
  54    if (Cache[Pkg].CandidateVer == 0 && Pkg->ProvidesList != 0)
  55    {
  56       CacheSetHelperAPTGet helper(c1out);
  57       helper.showErrors(false);
  58       pkgCache::VerIterator Ver = helper.canNotFindNewestVer(Cache, Pkg);
  59       if (Ver.end() == false)
  60          Pkg = Ver.ParentPkg();
  61       else if (helper.showVirtualPackageErrors(Cache) == false)
  62          return AllowFail;
  63    }
  64
  65    if (_config->FindB("Debug::BuildDeps",false) == true)
  66    {
  67       if (Remove == true)
  68          std::cout << "  Trying to remove " << Pkg << std::endl;
  69       else
  70          std::cout << "  Trying to install " << Pkg << std::endl;
  71    }
  72
  73    if (Remove == true)
  74    {
  75       TryToRemove RemoveAction(Cache, &Fix);
  76       RemoveAction(Pkg.VersionList());
  77    } else if (Cache[Pkg].CandidateVer != 0) {
  78       TryToInstall InstallAction(Cache, &Fix, BrokenFix);
  79       InstallAction(Cache[Pkg].CandidateVerIter(Cache));
  80       InstallAction.doAutoInstall();
  81    } else
  82       return AllowFail;
  83
  84    return true;
  85 }
  86                                                                         /*}}}*/
  87 // GetReleaseFileForSourceRecord - Return Suite for the given srcrecord /*{{{*/
  88 static pkgCache::RlsFileIterator GetReleaseFileForSourceRecord(CacheFile &CacheFile,
  89       pkgSourceList *SrcList, pkgSrcRecords::Parser *Parse)
  90 {
  91    // try to find release
  92    const pkgIndexFile& CurrentIndexFile = Parse->Index();
  93
  94    for (pkgSourceList::const_iterator S = SrcList->begin();
  95          S != SrcList->end(); ++S)
  96    {
  97       std::vector<pkgIndexFile *> *Indexes = (*S)->GetIndexFiles();
  98       for (std::vector<pkgIndexFile *>::const_iterator IF = Indexes->begin();
  99             IF != Indexes->end(); ++IF)
 100       {
 101          if (&CurrentIndexFile == (*IF))
 102             return (*S)->FindInCache(CacheFile, false);
 103       }
 104    }
 105    return pkgCache::RlsFileIterator(CacheFile);
 106 }
 107                                                                         /*}}}*/
 108 // FindSrc - Find a source record                                       /*{{{*/
 109 static pkgSrcRecords::Parser *FindSrc(const char *Name,
 110                                pkgSrcRecords &SrcRecs,std::string &Src,
 111                                CacheFile &CacheFile)
 112 {
 113    std::string VerTag, UserRequestedVerTag;
 114    std::string ArchTag = "";
 115    std::string RelTag = _config->Find("APT::Default-Release");
 116    std::string TmpSrc = Name;
 117    pkgDepCache *Cache = CacheFile.GetDepCache();
 118
 119    // extract release
 120    size_t found = TmpSrc.find_last_of("/");
 121    if (found != std::string::npos)
 122    {
 123       RelTag = TmpSrc.substr(found+1);
 124       TmpSrc = TmpSrc.substr(0,found);
 125    }
 126    // extract the version
 127    found = TmpSrc.find_last_of("=");
 128    if (found != std::string::npos)
 129    {
 130       VerTag = UserRequestedVerTag = TmpSrc.substr(found+1);
 131       TmpSrc = TmpSrc.substr(0,found);
 132    }
 133    // extract arch
 134    found = TmpSrc.find_last_of(":");
 135    if (found != std::string::npos)
 136    {
 137       ArchTag = TmpSrc.substr(found+1);
 138       TmpSrc = TmpSrc.substr(0,found);
 139    }
 140
 141    /* Lookup the version of the package we would install if we were to
 142       install a version and determine the source package name, then look
 143       in the archive for a source package of the same name. */
 144    bool MatchSrcOnly = _config->FindB("APT::Get::Only-Source");
 145    pkgCache::PkgIterator Pkg;
 146    if (ArchTag != "")
 147       Pkg = Cache->FindPkg(TmpSrc, ArchTag);
 148    else
 149       Pkg = Cache->FindPkg(TmpSrc);
 150
 151    // if we can't find a package but the user qualified with a arch,
 152    // error out here
 153    if (Pkg.end() && ArchTag != "")
 154    {
 155       Src = Name;
 156       _error->Error(_("Can not find a package for architecture '%s'"),
 157             ArchTag.c_str());
 158       return 0;
 159    }
 160
 161    if (MatchSrcOnly == false && Pkg.end() == false)
 162    {
 163       if(VerTag != "" || RelTag != "" || ArchTag != "")
 164       {
 165          bool fuzzy = false;
 166          // we have a default release, try to locate the pkg. we do it like
 167          // this because GetCandidateVer() will not "downgrade", that means
 168          // "apt-get source -t stable apt" won't work on a unstable system
 169          for (pkgCache::VerIterator Ver = Pkg.VersionList();; ++Ver)
 170          {
 171             // try first only exact matches, later fuzzy matches
 172             if (Ver.end() == true)
 173             {
 174                if (fuzzy == true)
 175                   break;
 176                fuzzy = true;
 177                Ver = Pkg.VersionList();
 178                // exit right away from the Pkg.VersionList() loop if we
 179                // don't have any versions
 180                if (Ver.end() == true)
 181                   break;
 182             }
 183
 184             // ignore arches that are not for us
 185             if (ArchTag != "" && Ver.Arch() != ArchTag)
 186                continue;
 187
 188             // pick highest version for the arch unless the user wants
 189             // something else
 190             if (ArchTag != "" && VerTag == "" && RelTag == "")
 191                if(Cache->VS().CmpVersion(VerTag, Ver.VerStr()) < 0)
 192                   VerTag = Ver.VerStr();
 193
 194             // We match against a concrete version (or a part of this version)
 195             if (VerTag.empty() == false &&
 196                   (fuzzy == true || Cache->VS().CmpVersion(VerTag, Ver.VerStr()) != 0) && // exact match
 197                   (fuzzy == false || strncmp(VerTag.c_str(), Ver.VerStr(), VerTag.size()) != 0)) // fuzzy match
 198                continue;
 199
 200             for (pkgCache::VerFileIterator VF = Ver.FileList();
 201                   VF.end() == false; ++VF)
 202             {
 203                /* If this is the status file, and the current version is not the
 204                   version in the status file (ie it is not installed, or somesuch)
 205                   then it is not a candidate for installation, ever. This weeds
 206                   out bogus entries that may be due to config-file states, or
 207                   other. */
 208                if ((VF.File()->Flags & pkgCache::Flag::NotSource) ==
 209                      pkgCache::Flag::NotSource && Pkg.CurrentVer() != Ver)
 210                   continue;
 211
 212                // or we match against a release
 213                if(VerTag.empty() == false ||
 214                      (VF.File().Archive() != 0 && VF.File().Archive() == RelTag) ||
 215                      (VF.File().Codename() != 0 && VF.File().Codename() == RelTag))
 216                {
 217                   // the Version we have is possibly fuzzy or includes binUploads,
 218                   // so we use the Version of the SourcePkg (empty if same as package)
 219                   Src = Ver.SourcePkgName();
 220                   VerTag = Ver.SourceVerStr();
 221                   break;
 222                }
 223             }
 224             if (Src.empty() == false)
 225                break;
 226          }
 227       }
 228
 229       if (Src == "" && ArchTag != "")
 230       {
 231          if (VerTag != "")
 232             _error->Error(_("Can not find a package '%s' with version '%s'"),
 233                   Pkg.FullName().c_str(), VerTag.c_str());
 234          if (RelTag != "")
 235             _error->Error(_("Can not find a package '%s' with release '%s'"),
 236                   Pkg.FullName().c_str(), RelTag.c_str());
 237          Src = Name;
 238          return 0;
 239       }
 240
 241
 242       if (Src.empty() == true)
 243       {
 244          // if we don't have found a fitting package yet so we will
 245          // choose a good candidate and proceed with that.
 246          // Maybe we will find a source later on with the right VerTag
 247          // or RelTag
 248          pkgCache::VerIterator const Ver = Cache->GetCandidateVersion(Pkg);
 249          if (Ver.end() == false)
 250          {
 251             if (strcmp(Ver.SourcePkgName(),Ver.ParentPkg().Name()) != 0)
 252                Src = Ver.SourcePkgName();
 253             if (VerTag.empty() == true && strcmp(Ver.SourceVerStr(),Ver.VerStr()) != 0)
 254                VerTag = Ver.SourceVerStr();
 255          }
 256       }
 257    }
 258
 259    if (Src.empty() == true)
 260    {
 261       Src = TmpSrc;
 262    }
 263    else
 264    {
 265       /* if we have a source pkg name, make sure to only search
 266          for srcpkg names, otherwise apt gets confused if there
 267          is a binary package "pkg1" and a source package "pkg1"
 268          with the same name but that comes from different packages */
 269       MatchSrcOnly = true;
 270       if (Src != TmpSrc)
 271       {
 272          ioprintf(c1out, _("Picking '%s' as source package instead of '%s'\n"), Src.c_str(), TmpSrc.c_str());
 273       }
 274    }
 275
 276    // The best hit
 277    pkgSrcRecords::Parser *Last = 0;
 278    unsigned long Offset = 0;
 279    std::string Version;
 280    pkgSourceList *SrcList = CacheFile.GetSourceList();
 281
 282    /* Iterate over all of the hits, which includes the resulting
 283       binary packages in the search */
 284                pkgSrcRecords::Parser *Parse;
 285                while (true)
 286                {
 287                   SrcRecs.Restart();
 288                   while ((Parse = SrcRecs.Find(Src.c_str(), MatchSrcOnly)) != 0)
 289                   {
 290                      const std::string Ver = Parse->Version();
 291                      bool CorrectRelTag = false;
 292
 293                      // See if we need to look for a specific release tag
 294                      if (RelTag != "" && UserRequestedVerTag == "")
 295                      {
 296                         pkgCache::RlsFileIterator const Rls = GetReleaseFileForSourceRecord(CacheFile, SrcList, Parse);
 297                         if (Rls.end() == false)
 298                         {
 299                            if ((Rls->Archive != 0 && RelTag == Rls.Archive()) ||
 300                                  (Rls->Codename != 0 && RelTag == Rls.Codename()))
 301                               CorrectRelTag = true;
 302                         }
 303                      } else
 304                         CorrectRelTag = true;
 305
 306                      // Ignore all versions which doesn't fit
 307                      if (VerTag.empty() == false &&
 308                            Cache->VS().CmpVersion(VerTag, Ver) != 0) // exact match
 309                         continue;
 310
 311                      // Newer version or an exact match? Save the hit
 312                      if (CorrectRelTag && (Last == 0 || Cache->VS().CmpVersion(Version,Ver) < 0)) {
 313                         Last = Parse;
 314                         Offset = Parse->Offset();
 315                         Version = Ver;
 316                      }
 317
 318                      // was the version check above an exact match?
 319                      // If so, we don't need to look further
 320                      if (VerTag.empty() == false && (VerTag == Ver))
 321                         break;
 322                   }
 323                   if (UserRequestedVerTag == "" && Version != "" && RelTag != "")
 324                      ioprintf(c1out, "Selected version '%s' (%s) for %s\n",
 325                            Version.c_str(), RelTag.c_str(), Src.c_str());
 326
 327                   if (Last != 0 || VerTag.empty() == true)
 328                      break;
 329                   _error->Error(_("Can not find version '%s' of package '%s'"), VerTag.c_str(), TmpSrc.c_str());
 330                   return 0;
 331                }
 332
 333                if (Last == 0 || Last->Jump(Offset) == false)
 334                   return 0;
 335
 336                return Last;
 337 }
 338                                                                         /*}}}*/
 339 // DoSource - Fetch a source archive                                    /*{{{*/
 340 // ---------------------------------------------------------------------
 341 /* Fetch souce packages */
 342 struct DscFile
 343 {
 344    std::string Package;
 345    std::string Version;
 346    std::string Dsc;
 347 };
 348 bool DoSource(CommandLine &CmdL)
 349 {
 350    CacheFile Cache;
 351    if (Cache.Open(false) == false)
 352       return false;
 353
 354    if (CmdL.FileSize() <= 1)
 355       return _error->Error(_("Must specify at least one package to fetch source for"));
 356
 357    // Read the source list
 358    if (Cache.BuildSourceList() == false)
 359       return false;
 360    pkgSourceList *List = Cache.GetSourceList();
 361
 362    // Create the text record parsers
 363    pkgSrcRecords SrcRecs(*List);
 364    if (_error->PendingError() == true)
 365       return false;
 366
 367    std::unique_ptr<DscFile[]> Dsc(new DscFile[CmdL.FileSize()]);
 368
 369    // insert all downloaded uris into this set to avoid downloading them
 370    // twice
 371    std::set<std::string> queued;
 372
 373    // Diff only mode only fetches .diff files
 374    bool const diffOnly = _config->FindB("APT::Get::Diff-Only", false);
 375    // Tar only mode only fetches .tar files
 376    bool const tarOnly = _config->FindB("APT::Get::Tar-Only", false);
 377    // Dsc only mode only fetches .dsc files
 378    bool const dscOnly = _config->FindB("APT::Get::Dsc-Only", false);
 379
 380    // Load the requestd sources into the fetcher
 381    aptAcquireWithTextStatus Fetcher;
 382    unsigned J = 0;
 383    std::vector<std::string> UntrustedList;
 384    for (const char **I = CmdL.FileList + 1; *I != 0; I++, J++)
 385    {
 386       std::string Src;
 387       pkgSrcRecords::Parser *Last = FindSrc(*I,SrcRecs,Src,Cache);
 388       if (Last == 0) {
 389          return _error->Error(_("Unable to find a source package for %s"),Src.c_str());
 390       }
 391
 392       if (Last->Index().IsTrusted() == false)
 393          UntrustedList.push_back(Src);
 394
 395       std::string srec = Last->AsStr();
 396       std::string::size_type pos = srec.find("\nVcs-");
 397       while (pos != std::string::npos)
 398       {
 399          pos += strlen("\nVcs-");
 400          std::string vcs = srec.substr(pos,srec.find(":",pos)-pos);
 401          if(vcs == "Browser")
 402          {
 403             pos = srec.find("\nVcs-", pos);
 404             continue;
 405          }
 406          pos += vcs.length()+2;
 407          std::string::size_type epos = srec.find("\n", pos);
 408          std::string const uri = srec.substr(pos,epos-pos);
 409          ioprintf(c1out, _("NOTICE: '%s' packaging is maintained in "
 410                   "the '%s' version control system at:\n"
 411                   "%s\n"),
 412                Src.c_str(), vcs.c_str(), uri.c_str());
 413          std::string vcscmd;
 414          if (vcs == "Bzr")
 415             vcscmd = "bzr branch " + uri;
 416          else if (vcs == "Git")
 417             vcscmd = "git clone " + uri;
 418
 419          if (vcscmd.empty() == false)
 420             ioprintf(c1out,_("Please use:\n%s\n"
 421                      "to retrieve the latest (possibly unreleased) "
 422                      "updates to the package.\n"),
 423                   vcscmd.c_str());
 424          break;
 425       }
 426
 427       // Back track
 428       std::vector<pkgSrcRecords::File2> Lst;
 429       if (Last->Files2(Lst) == false) {
 430          return false;
 431       }
 432
 433       // Load them into the fetcher
 434       for (std::vector<pkgSrcRecords::File2>::const_iterator I = Lst.begin();
 435             I != Lst.end(); ++I)
 436       {
 437          // Try to guess what sort of file it is we are getting.
 438          if (I->Type == "dsc")
 439          {
 440             Dsc[J].Package = Last->Package();
 441             Dsc[J].Version = Last->Version();
 442             Dsc[J].Dsc = flNotDir(I->Path);
 443          }
 444
 445          // Handle the only options so that multiple can be used at once
 446          if (diffOnly == true || tarOnly == true || dscOnly == true)
 447          {
 448             if ((diffOnly == true && I->Type == "diff") ||
 449                   (tarOnly == true && I->Type == "tar") ||
 450                   (dscOnly == true && I->Type == "dsc"))
 451                ; // Fine, we want this file downloaded
 452             else
 453                continue;
 454          }
 455
 456          // don't download the same uri twice (should this be moved to
 457          // the fetcher interface itself?)
 458          if(queued.find(Last->Index().ArchiveURI(I->Path)) != queued.end())
 459             continue;
 460          queued.insert(Last->Index().ArchiveURI(I->Path));
 461
 462          // check if we have a file with that md5 sum already localy
 463          std::string localFile = flNotDir(I->Path);
 464          if (FileExists(localFile) == true)
 465             if(I->Hashes.VerifyFile(localFile) == true)
 466             {
 467                ioprintf(c1out,_("Skipping already downloaded file '%s'\n"),
 468                      localFile.c_str());
 469                continue;
 470             }
 471
 472          // see if we have a hash (Acquire::ForceHash is the only way to have none)
 473          if (I->Hashes.usable() == false && _config->FindB("APT::Get::AllowUnauthenticated",false) == false)
 474          {
 475             ioprintf(c1out, "Skipping download of file '%s' as requested hashsum is not available for authentication\n",
 476                   localFile.c_str());
 477             continue;
 478          }
 479
 480          new pkgAcqFile(&Fetcher,Last->Index().ArchiveURI(I->Path),
 481                I->Hashes, I->FileSize, Last->Index().SourceInfo(*Last,*I), Src);
 482       }
 483    }
 484
 485    // Display statistics
 486    unsigned long long FetchBytes = Fetcher.FetchNeeded();
 487    unsigned long long FetchPBytes = Fetcher.PartialPresent();
 488    unsigned long long DebBytes = Fetcher.TotalNeeded();
 489
 490    if (CheckFreeSpaceBeforeDownload(".", (FetchBytes - FetchPBytes)) == false)
 491       return false;
 492
 493    // Number of bytes
 494    if (DebBytes != FetchBytes)
 495       //TRANSLATOR: The required space between number and unit is already included
 496       // in the replacement strings, so %sB will be correctly translate in e.g. 1,5 MB
 497       ioprintf(c1out,_("Need to get %sB/%sB of source archives.\n"),
 498             SizeToStr(FetchBytes).c_str(),SizeToStr(DebBytes).c_str());
 499    else
 500       //TRANSLATOR: The required space between number and unit is already included
 501       // in the replacement string, so %sB will be correctly translate in e.g. 1,5 MB
 502       ioprintf(c1out,_("Need to get %sB of source archives.\n"),
 503             SizeToStr(DebBytes).c_str());
 504
 505    if (_config->FindB("APT::Get::Simulate",false) == true)
 506    {
 507       for (unsigned I = 0; I != J; I++)
 508          ioprintf(std::cout,_("Fetch source %s\n"),Dsc[I].Package.c_str());
 509       return true;
 510    }
 511
 512    // Just print out the uris an exit if the --print-uris flag was used
 513    if (_config->FindB("APT::Get::Print-URIs") == true)
 514    {
 515       pkgAcquire::UriIterator I = Fetcher.UriBegin();
 516       for (; I != Fetcher.UriEnd(); ++I)
 517          std::cout << '\'' << I->URI << "' " << flNotDir(I->Owner->DestFile) << ' ' <<
 518             I->Owner->FileSize << ' ' << I->Owner->HashSum() << std::endl;
 519       return true;
 520    }
 521
 522    // check authentication status of the source as well
 523    if (UntrustedList.empty() == false && AuthPrompt(UntrustedList, false) == false)
 524       return false;
 525
 526    // Run it
 527    bool Failed = false;
 528    if (AcquireRun(Fetcher, 0, &Failed, NULL) == false || Failed == true)
 529    {
 530       return _error->Error(_("Failed to fetch some archives."));
 531    }
 532
 533    if (_config->FindB("APT::Get::Download-only",false) == true)
 534    {
 535       c1out << _("Download complete and in download only mode") << std::endl;
 536       return true;
 537    }
 538
 539    // Unpack the sources
 540    pid_t Process = ExecFork();
 541
 542    if (Process == 0)
 543    {
 544       bool const fixBroken = _config->FindB("APT::Get::Fix-Broken", false);
 545       for (unsigned I = 0; I != J; ++I)
 546       {
 547          std::string Dir = Dsc[I].Package + '-' + Cache->VS().UpstreamVersion(Dsc[I].Version.c_str());
 548
 549          // Diff only mode only fetches .diff files
 550          if (_config->FindB("APT::Get::Diff-Only",false) == true ||
 551                _config->FindB("APT::Get::Tar-Only",false) == true ||
 552                Dsc[I].Dsc.empty() == true)
 553             continue;
 554
 555          // See if the package is already unpacked
 556          struct stat Stat;
 557          if (fixBroken == false && stat(Dir.c_str(),&Stat) == 0 &&
 558                S_ISDIR(Stat.st_mode) != 0)
 559          {
 560             ioprintf(c0out ,_("Skipping unpack of already unpacked source in %s\n"),
 561                   Dir.c_str());
 562          }
 563          else
 564          {
 565             // Call dpkg-source
 566             std::string const sourceopts = _config->Find("DPkg::Source-Options", "-x");
 567             std::string S;
 568             strprintf(S, "%s %s %s",
 569                   _config->Find("Dir::Bin::dpkg-source","dpkg-source").c_str(),
 570                   sourceopts.c_str(), Dsc[I].Dsc.c_str());
 571             if (system(S.c_str()) != 0)
 572             {
 573                fprintf(stderr, _("Unpack command '%s' failed.\n"), S.c_str());
 574                fprintf(stderr, _("Check if the 'dpkg-dev' package is installed.\n"));
 575                _exit(1);
 576             }
 577          }
 578
 579          // Try to compile it with dpkg-buildpackage
 580          if (_config->FindB("APT::Get::Compile",false) == true)
 581          {
 582             std::string buildopts = _config->Find("APT::Get::Host-Architecture");
 583             if (buildopts.empty() == false)
 584                buildopts = "-a" + buildopts + " ";
 585
 586             // get all active build profiles
 587             std::string const profiles = APT::Configuration::getBuildProfilesString();
 588             if (profiles.empty() == false)
 589                buildopts.append(" -P").append(profiles).append(" ");
 590
 591             buildopts.append(_config->Find("DPkg::Build-Options","-b -uc"));
 592
 593             // Call dpkg-buildpackage
 594             std::string S;
 595             strprintf(S, "cd %s && %s %s",
 596                   Dir.c_str(),
 597                   _config->Find("Dir::Bin::dpkg-buildpackage","dpkg-buildpackage").c_str(),
 598                   buildopts.c_str());
 599
 600             if (system(S.c_str()) != 0)
 601             {
 602                fprintf(stderr, _("Build command '%s' failed.\n"), S.c_str());
 603                _exit(1);
 604             }
 605          }
 606       }
 607
 608       _exit(0);
 609    }
 610
 611    return ExecWait(Process, "dpkg-source");
 612 }
 613                                                                         /*}}}*/
 614 // DoBuildDep - Install/removes packages to satisfy build dependencies  /*{{{*/
 615 // ---------------------------------------------------------------------
 616 /* This function will look at the build depends list of the given source
 617    package and install the necessary packages to make it true, or fail. */
 618 bool DoBuildDep(CommandLine &CmdL)
 619 {
 620    CacheFile Cache;
 621
 622    _config->Set("APT::Install-Recommends", false);
 623
 624    bool WantLock = _config->FindB("APT::Get::Print-URIs", false) == false;
 625
 626    if (Cache.Open(WantLock) == false)
 627       return false;
 628
 629    if (CmdL.FileSize() <= 1)
 630       return _error->Error(_("Must specify at least one package to check builddeps for"));
 631
 632    // Read the source list
 633    if (Cache.BuildSourceList() == false)
 634       return false;
 635    pkgSourceList *List = Cache.GetSourceList();
 636
 637    // Create the text record parsers
 638    pkgSrcRecords SrcRecs(*List);
 639    if (_error->PendingError() == true)
 640       return false;
 641
 642    bool StripMultiArch;
 643    std::string hostArch = _config->Find("APT::Get::Host-Architecture");
 644    if (hostArch.empty() == false)
 645    {
 646       std::vector<std::string> archs = APT::Configuration::getArchitectures();
 647       if (std::find(archs.begin(), archs.end(), hostArch) == archs.end())
 648          return _error->Error(_("No architecture information available for %s. See apt.conf(5) APT::Architectures for setup"), hostArch.c_str());
 649       StripMultiArch = false;
 650    }
 651    else
 652       StripMultiArch = true;
 653
 654    unsigned J = 0;
 655    for (const char **I = CmdL.FileList + 1; *I != 0; I++, J++)
 656    {
 657       std::string Src;
 658       pkgSrcRecords::Parser *Last = 0;
 659       std::unique_ptr<pkgSrcRecords::Parser> LastOwner;
 660
 661       // an unpacked debian source tree
 662       using APT::String::Startswith;
 663       if ((Startswith(*I, "./") || Startswith(*I, "/")) &&
 664             DirectoryExists(*I))
 665       {
 666          ioprintf(c1out, _("Note, using directory '%s' to get the build dependencies\n"), *I);
 667          // FIXME: how can we make this more elegant?
 668          std::string TypeName = "Debian control file";
 669          pkgIndexFile::Type *Type = pkgIndexFile::Type::GetType(TypeName.c_str());
 670          if(Type != NULL)
 671             LastOwner.reset(Last = Type->CreateSrcPkgParser(*I));
 672       }
 673       // if its a local file (e.g. .dsc) use this
 674       else if (FileExists(*I))
 675       {
 676          ioprintf(c1out, _("Note, using file '%s' to get the build dependencies\n"), *I);
 677
 678          // see if we can get a parser for this pkgIndexFile type
 679          std::string TypeName = "Debian " + flExtension(*I) + " file";
 680          pkgIndexFile::Type *Type = pkgIndexFile::Type::GetType(TypeName.c_str());
 681          if(Type != NULL)
 682             LastOwner.reset(Last = Type->CreateSrcPkgParser(*I));
 683       } else {
 684          // normal case, search the cache for the source file
 685          Last = FindSrc(*I,SrcRecs,Src,Cache);
 686       }
 687
 688       if (Last == 0)
 689          return _error->Error(_("Unable to find a source package for %s"),Src.c_str());
 690
 691       // Process the build-dependencies
 692       std::vector<pkgSrcRecords::Parser::BuildDepRec> BuildDeps;
 693       // FIXME: Can't specify architecture to use for [wildcard] matching, so switch default arch temporary
 694       if (hostArch.empty() == false)
 695       {
 696          std::string nativeArch = _config->Find("APT::Architecture");
 697          _config->Set("APT::Architecture", hostArch);
 698          bool Success = Last->BuildDepends(BuildDeps, _config->FindB("APT::Get::Arch-Only", false), StripMultiArch);
 699          _config->Set("APT::Architecture", nativeArch);
 700          if (Success == false)
 701             return _error->Error(_("Unable to get build-dependency information for %s"),Src.c_str());
 702       }
 703       else if (Last->BuildDepends(BuildDeps, _config->FindB("APT::Get::Arch-Only", false), StripMultiArch) == false)
 704          return _error->Error(_("Unable to get build-dependency information for %s"),Src.c_str());
 705
 706       // Also ensure that build-essential packages are present
 707       Configuration::Item const *Opts = _config->Tree("APT::Build-Essential");
 708       if (Opts)
 709          Opts = Opts->Child;
 710       for (; Opts; Opts = Opts->Next)
 711       {
 712          if (Opts->Value.empty() == true)
 713             continue;
 714
 715          pkgSrcRecords::Parser::BuildDepRec rec;
 716          rec.Package = Opts->Value;
 717          rec.Type = pkgSrcRecords::Parser::BuildDependIndep;
 718          rec.Op = 0;
 719          BuildDeps.push_back(rec);
 720       }
 721
 722       if (BuildDeps.empty() == true)
 723       {
 724          ioprintf(c1out,_("%s has no build depends.\n"),Src.c_str());
 725          continue;
 726       }
 727
 728       // Install the requested packages
 729       std::vector <pkgSrcRecords::Parser::BuildDepRec>::iterator D;
 730       pkgProblemResolver Fix(Cache);
 731       bool skipAlternatives = false; // skip remaining alternatives in an or group
 732       for (D = BuildDeps.begin(); D != BuildDeps.end(); ++D)
 733       {
 734          bool hasAlternatives = (((*D).Op & pkgCache::Dep::Or) == pkgCache::Dep::Or);
 735
 736          if (skipAlternatives == true)
 737          {
 738             /*
 739              * if there are alternatives, we've already picked one, so skip
 740              * the rest
 741              *
 742              * TODO: this means that if there's a build-dep on A|B and B is
 743              * installed, we'll still try to install A; more importantly,
 744              * if A is currently broken, we cannot go back and try B. To fix
 745              * this would require we do a Resolve cycle for each package we
 746              * add to the install list. Ugh
 747              */
 748             if (!hasAlternatives)
 749                skipAlternatives = false; // end of or group
 750             continue;
 751          }
 752
 753          if ((*D).Type == pkgSrcRecords::Parser::BuildConflict ||
 754                (*D).Type == pkgSrcRecords::Parser::BuildConflictIndep)
 755          {
 756             pkgCache::GrpIterator Grp = Cache->FindGrp((*D).Package);
 757             // Build-conflicts on unknown packages are silently ignored
 758             if (Grp.end() == true)
 759                continue;
 760
 761             for (pkgCache::PkgIterator Pkg = Grp.PackageList(); Pkg.end() == false; Pkg = Grp.NextPkg(Pkg))
 762             {
 763                pkgCache::VerIterator IV = (*Cache)[Pkg].InstVerIter(*Cache);
 764                /*
 765                 * Remove if we have an installed version that satisfies the
 766                 * version criteria
 767                 */
 768                if (IV.end() == false &&
 769                      Cache->VS().CheckDep(IV.VerStr(),(*D).Op,(*D).Version.c_str()) == true)
 770                   TryToInstallBuildDep(Pkg,Cache,Fix,true,false);
 771             }
 772          }
 773          else // BuildDep || BuildDepIndep
 774          {
 775             if (_config->FindB("Debug::BuildDeps",false) == true)
 776                std::cout << "Looking for " << (*D).Package << "...\n";
 777
 778             pkgCache::PkgIterator Pkg;
 779
 780             // Cross-Building?
 781             if (StripMultiArch == false && D->Type != pkgSrcRecords::Parser::BuildDependIndep)
 782             {
 783                size_t const colon = D->Package.find(":");
 784                if (colon != std::string::npos)
 785                {
 786                   if (strcmp(D->Package.c_str() + colon, ":any") == 0 || strcmp(D->Package.c_str() + colon, ":native") == 0)
 787                      Pkg = Cache->FindPkg(D->Package.substr(0,colon));
 788                   else
 789                      Pkg = Cache->FindPkg(D->Package);
 790                }
 791                else
 792                   Pkg = Cache->FindPkg(D->Package, hostArch);
 793
 794                // a bad version either is invalid or doesn't satify dependency
 795 #define BADVER(Ver) (Ver.end() == true || \
 796       (D->Version.empty() == false && \
 797        Cache->VS().CheckDep(Ver.VerStr(),D->Op,D->Version.c_str()) == false))
 798
 799                APT::VersionList verlist;
 800                if (Pkg.end() == false)
 801                {
 802                   pkgCache::VerIterator Ver = (*Cache)[Pkg].InstVerIter(*Cache);
 803                   if (BADVER(Ver) == false)
 804                      verlist.insert(Ver);
 805                   Ver = (*Cache)[Pkg].CandidateVerIter(*Cache);
 806                   if (BADVER(Ver) == false)
 807                      verlist.insert(Ver);
 808                }
 809                if (verlist.empty() == true)
 810                {
 811                   pkgCache::PkgIterator BuildPkg = Cache->FindPkg(D->Package, "native");
 812                   if (BuildPkg.end() == false && Pkg != BuildPkg)
 813                   {
 814                      pkgCache::VerIterator Ver = (*Cache)[BuildPkg].InstVerIter(*Cache);
 815                      if (BADVER(Ver) == false)
 816                         verlist.insert(Ver);
 817                      Ver = (*Cache)[BuildPkg].CandidateVerIter(*Cache);
 818                      if (BADVER(Ver) == false)
 819                         verlist.insert(Ver);
 820                   }
 821                }
 822 #undef BADVER
 823
 824                std::string forbidden;
 825                // We need to decide if host or build arch, so find a version we can look at
 826                APT::VersionList::const_iterator Ver = verlist.begin();
 827                for (; Ver != verlist.end(); ++Ver)
 828                {
 829                   forbidden.clear();
 830                   if (Ver->MultiArch == pkgCache::Version::No || Ver->MultiArch == pkgCache::Version::All)
 831                   {
 832                      if (colon == std::string::npos)
 833                         Pkg = Ver.ParentPkg().Group().FindPkg(hostArch);
 834                      else if (strcmp(D->Package.c_str() + colon, ":any") == 0)
 835                         forbidden = "Multi-Arch: no";
 836                      else if (strcmp(D->Package.c_str() + colon, ":native") == 0)
 837                         Pkg = Ver.ParentPkg().Group().FindPkg("native");
 838                   }
 839                   else if (Ver->MultiArch == pkgCache::Version::Same)
 840                   {
 841                      if (colon == std::string::npos)
 842                         Pkg = Ver.ParentPkg().Group().FindPkg(hostArch);
 843                      else if (strcmp(D->Package.c_str() + colon, ":any") == 0)
 844                         forbidden = "Multi-Arch: same";
 845                      else if (strcmp(D->Package.c_str() + colon, ":native") == 0)
 846                         Pkg = Ver.ParentPkg().Group().FindPkg("native");
 847                   }
 848                   else if ((Ver->MultiArch & pkgCache::Version::Foreign) == pkgCache::Version::Foreign)
 849                   {
 850                      if (colon == std::string::npos)
 851                         Pkg = Ver.ParentPkg().Group().FindPkg("native");
 852                      else if (strcmp(D->Package.c_str() + colon, ":any") == 0 ||
 853                            strcmp(D->Package.c_str() + colon, ":native") == 0)
 854                         forbidden = "Multi-Arch: foreign";
 855                   }
 856                   else if ((Ver->MultiArch & pkgCache::Version::Allowed) == pkgCache::Version::Allowed)
 857                   {
 858                      if (colon == std::string::npos)
 859                         Pkg = Ver.ParentPkg().Group().FindPkg(hostArch);
 860                      else if (strcmp(D->Package.c_str() + colon, ":any") == 0)
 861                      {
 862                         // prefer any installed over preferred non-installed architectures
 863                         pkgCache::GrpIterator Grp = Ver.ParentPkg().Group();
 864                         // we don't check for version here as we are better of with upgrading than remove and install
 865                         for (Pkg = Grp.PackageList(); Pkg.end() == false; Pkg = Grp.NextPkg(Pkg))
 866                            if (Pkg.CurrentVer().end() == false)
 867                               break;
 868                         if (Pkg.end() == true)
 869                            Pkg = Grp.FindPreferredPkg(true);
 870                      }
 871                      else if (strcmp(D->Package.c_str() + colon, ":native") == 0)
 872                         Pkg = Ver.ParentPkg().Group().FindPkg("native");
 873                   }
 874
 875                   if (forbidden.empty() == false)
 876                   {
 877                      if (_config->FindB("Debug::BuildDeps",false) == true)
 878                         std::cout << D->Package.substr(colon, std::string::npos) << " is not allowed from " << forbidden << " package " << (*D).Package << " (" << Ver.VerStr() << ")" << std::endl;
 879                      continue;
 880                   }
 881
 882                   //we found a good version
 883                   break;
 884                }
 885                if (Ver == verlist.end())
 886                {
 887                   if (_config->FindB("Debug::BuildDeps",false) == true)
 888                      std::cout << " No multiarch info as we have no satisfying installed nor candidate for " << D->Package << " on build or host arch" << std::endl;
 889
 890                   if (forbidden.empty() == false)
 891                   {
 892                      if (hasAlternatives)
 893                         continue;
 894                      return _error->Error(_("%s dependency for %s can't be satisfied "
 895                               "because %s is not allowed on '%s' packages"),
 896                            Last->BuildDepType(D->Type), Src.c_str(),
 897                            D->Package.c_str(), forbidden.c_str());
 898                   }
 899                }
 900             }
 901             else
 902                Pkg = Cache->FindPkg(D->Package);
 903
 904             if (Pkg.end() == true || (Pkg->VersionList == 0 && Pkg->ProvidesList == 0))
 905             {
 906                if (_config->FindB("Debug::BuildDeps",false) == true)
 907                   std::cout << " (not found)" << (*D).Package << std::endl;
 908
 909                if (hasAlternatives)
 910                   continue;
 911
 912                return _error->Error(_("%s dependency for %s cannot be satisfied "
 913                         "because the package %s cannot be found"),
 914                      Last->BuildDepType((*D).Type),Src.c_str(),
 915                      (*D).Package.c_str());
 916             }
 917
 918             pkgCache::VerIterator IV = (*Cache)[Pkg].InstVerIter(*Cache);
 919             if (IV.end() == false)
 920             {
 921                if (_config->FindB("Debug::BuildDeps",false) == true)
 922                   std::cout << "  Is installed\n";
 923
 924                if (D->Version.empty() == true ||
 925                      Cache->VS().CheckDep(IV.VerStr(),(*D).Op,(*D).Version.c_str()) == true)
 926                {
 927                   skipAlternatives = hasAlternatives;
 928                   continue;
 929                }
 930
 931                if (_config->FindB("Debug::BuildDeps",false) == true)
 932                   std::cout << "    ...but the installed version doesn't meet the version requirement\n";
 933
 934                if (((*D).Op & pkgCache::Dep::LessEq) == pkgCache::Dep::LessEq)
 935                   return _error->Error(_("Failed to satisfy %s dependency for %s: Installed package %s is too new"),
 936                         Last->BuildDepType((*D).Type), Src.c_str(), Pkg.FullName(true).c_str());
 937             }
 938
 939             // Only consider virtual packages if there is no versioned dependency
 940             if ((*D).Version.empty() == true)
 941             {
 942                /*
 943                 * If this is a virtual package, we need to check the list of
 944                 * packages that provide it and see if any of those are
 945                 * installed
 946                 */
 947                pkgCache::PrvIterator Prv = Pkg.ProvidesList();
 948                for (; Prv.end() != true; ++Prv)
 949                {
 950                   if (_config->FindB("Debug::BuildDeps",false) == true)
 951                      std::cout << "  Checking provider " << Prv.OwnerPkg().FullName() << std::endl;
 952
 953                   if ((*Cache)[Prv.OwnerPkg()].InstVerIter(*Cache).end() == false)
 954                      break;
 955                }
 956
 957                if (Prv.end() == false)
 958                {
 959                   if (_config->FindB("Debug::BuildDeps",false) == true)
 960                      std::cout << "  Is provided by installed package " << Prv.OwnerPkg().FullName() << std::endl;
 961                   skipAlternatives = hasAlternatives;
 962                   continue;
 963                }
 964             }
 965             else // versioned dependency
 966             {
 967                pkgCache::VerIterator CV = (*Cache)[Pkg].CandidateVerIter(*Cache);
 968                if (CV.end() == true ||
 969                      Cache->VS().CheckDep(CV.VerStr(),(*D).Op,(*D).Version.c_str()) == false)
 970                {
 971                   if (hasAlternatives)
 972                      continue;
 973                   else if (CV.end() == false)
 974                      return _error->Error(_("%s dependency for %s cannot be satisfied "
 975                               "because candidate version of package %s "
 976                               "can't satisfy version requirements"),
 977                            Last->BuildDepType(D->Type), Src.c_str(),
 978                            D->Package.c_str());
 979                   else
 980                      return _error->Error(_("%s dependency for %s cannot be satisfied "
 981                               "because package %s has no candidate version"),
 982                            Last->BuildDepType(D->Type), Src.c_str(),
 983                            D->Package.c_str());
 984                }
 985             }
 986
 987             if (TryToInstallBuildDep(Pkg,Cache,Fix,false,false,false) == true)
 988             {
 989                // We successfully installed something; skip remaining alternatives
 990                skipAlternatives = hasAlternatives;
 991                if(_config->FindB("APT::Get::Build-Dep-Automatic", false) == true)
 992                   Cache->MarkAuto(Pkg, true);
 993                continue;
 994             }
 995             else if (hasAlternatives)
 996             {
 997                if (_config->FindB("Debug::BuildDeps",false) == true)
 998                   std::cout << "  Unsatisfiable, trying alternatives\n";
 999                continue;
1000             }
1001             else
1002             {
1003                return _error->Error(_("Failed to satisfy %s dependency for %s: %s"),
1004                      Last->BuildDepType((*D).Type),
1005                      Src.c_str(),
1006                      (*D).Package.c_str());
1007             }
1008          }
1009       }
1010
1011       if (Fix.Resolve(true) == false)
1012          _error->Discard();
1013
1014       // Now we check the state of the packages,
1015       if (Cache->BrokenCount() != 0)
1016       {
1017          ShowBroken(std::cout, Cache, false);
1018          return _error->Error(_("Build-dependencies for %s could not be satisfied."),*I);
1019       }
1020    }
1021
1022    if (InstallPackages(Cache, false, true) == false)
1023       return _error->Error(_("Failed to process build dependencies"));
1024    return true;
1025 }
1026                                                                         /*}}}*/