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 // InstallBuildDepsLoop                                                 /*{{{*/
 615 static bool InstallBuildDepsLoop(CacheFile &Cache, std::string const &Src,
 616       std::vector<pkgSrcRecords::Parser::BuildDepRec> const &BuildDeps,
 617       bool const StripMultiArch, std::string const &hostArch)
 618 {
 619    // Install the requested packages
 620    std::vector <pkgSrcRecords::Parser::BuildDepRec>::const_iterator D;
 621    pkgProblemResolver Fix(Cache);
 622    bool skipAlternatives = false; // skip remaining alternatives in an or group
 623    for (D = BuildDeps.begin(); D != BuildDeps.end(); ++D)
 624    {
 625       bool hasAlternatives = (((*D).Op & pkgCache::Dep::Or) == pkgCache::Dep::Or);
 626
 627       if (skipAlternatives == true)
 628       {
 629          /*
 630           * if there are alternatives, we've already picked one, so skip
 631           * the rest
 632           *
 633           * TODO: this means that if there's a build-dep on A|B and B is
 634           * installed, we'll still try to install A; more importantly,
 635           * if A is currently broken, we cannot go back and try B. To fix
 636           * this would require we do a Resolve cycle for each package we
 637           * add to the install list. Ugh
 638           */
 639          if (!hasAlternatives)
 640             skipAlternatives = false; // end of or group
 641          continue;
 642       }
 643
 644       if ((*D).Type == pkgSrcRecords::Parser::BuildConflict ||
 645             (*D).Type == pkgSrcRecords::Parser::BuildConflictIndep)
 646       {
 647          pkgCache::GrpIterator Grp = Cache->FindGrp((*D).Package);
 648          // Build-conflicts on unknown packages are silently ignored
 649          if (Grp.end() == true)
 650             continue;
 651
 652          for (pkgCache::PkgIterator Pkg = Grp.PackageList(); Pkg.end() == false; Pkg = Grp.NextPkg(Pkg))
 653          {
 654             pkgCache::VerIterator IV = (*Cache)[Pkg].InstVerIter(*Cache);
 655             /*
 656              * Remove if we have an installed version that satisfies the
 657              * version criteria
 658              */
 659             if (IV.end() == false &&
 660                   Cache->VS().CheckDep(IV.VerStr(),(*D).Op,(*D).Version.c_str()) == true)
 661                TryToInstallBuildDep(Pkg,Cache,Fix,true,false);
 662          }
 663       }
 664       else // BuildDep || BuildDepIndep
 665       {
 666          if (_config->FindB("Debug::BuildDeps",false) == true)
 667             std::cout << "Looking for " << (*D).Package << "...\n";
 668
 669          pkgCache::PkgIterator Pkg;
 670
 671          // Cross-Building?
 672          if (StripMultiArch == false && D->Type != pkgSrcRecords::Parser::BuildDependIndep)
 673          {
 674             size_t const colon = D->Package.find(":");
 675             if (colon != std::string::npos)
 676             {
 677                if (strcmp(D->Package.c_str() + colon, ":any") == 0 || strcmp(D->Package.c_str() + colon, ":native") == 0)
 678                   Pkg = Cache->FindPkg(D->Package.substr(0,colon));
 679                else
 680                   Pkg = Cache->FindPkg(D->Package);
 681             }
 682             else
 683                Pkg = Cache->FindPkg(D->Package, hostArch);
 684
 685             // a bad version either is invalid or doesn't satify dependency
 686 #define BADVER(Ver) (Ver.end() == true || \
 687       (D->Version.empty() == false && \
 688        Cache->VS().CheckDep(Ver.VerStr(),D->Op,D->Version.c_str()) == false))
 689
 690             APT::VersionList verlist;
 691             if (Pkg.end() == false)
 692             {
 693                pkgCache::VerIterator Ver = (*Cache)[Pkg].InstVerIter(*Cache);
 694                if (BADVER(Ver) == false)
 695                   verlist.insert(Ver);
 696                Ver = (*Cache)[Pkg].CandidateVerIter(*Cache);
 697                if (BADVER(Ver) == false)
 698                   verlist.insert(Ver);
 699             }
 700             if (verlist.empty() == true)
 701             {
 702                pkgCache::PkgIterator BuildPkg = Cache->FindPkg(D->Package, "native");
 703                if (BuildPkg.end() == false && Pkg != BuildPkg)
 704                {
 705                   pkgCache::VerIterator Ver = (*Cache)[BuildPkg].InstVerIter(*Cache);
 706                   if (BADVER(Ver) == false)
 707                      verlist.insert(Ver);
 708                   Ver = (*Cache)[BuildPkg].CandidateVerIter(*Cache);
 709                   if (BADVER(Ver) == false)
 710                      verlist.insert(Ver);
 711                }
 712             }
 713 #undef BADVER
 714
 715             std::string forbidden;
 716             // We need to decide if host or build arch, so find a version we can look at
 717             APT::VersionList::const_iterator Ver = verlist.begin();
 718             for (; Ver != verlist.end(); ++Ver)
 719             {
 720                forbidden.clear();
 721                if (Ver->MultiArch == pkgCache::Version::No || Ver->MultiArch == pkgCache::Version::All)
 722                {
 723                   if (colon == std::string::npos)
 724                      Pkg = Ver.ParentPkg().Group().FindPkg(hostArch);
 725                   else if (strcmp(D->Package.c_str() + colon, ":any") == 0)
 726                      forbidden = "Multi-Arch: no";
 727                   else if (strcmp(D->Package.c_str() + colon, ":native") == 0)
 728                      Pkg = Ver.ParentPkg().Group().FindPkg("native");
 729                }
 730                else if (Ver->MultiArch == pkgCache::Version::Same)
 731                {
 732                   if (colon == std::string::npos)
 733                      Pkg = Ver.ParentPkg().Group().FindPkg(hostArch);
 734                   else if (strcmp(D->Package.c_str() + colon, ":any") == 0)
 735                      forbidden = "Multi-Arch: same";
 736                   else if (strcmp(D->Package.c_str() + colon, ":native") == 0)
 737                      Pkg = Ver.ParentPkg().Group().FindPkg("native");
 738                }
 739                else if ((Ver->MultiArch & pkgCache::Version::Foreign) == pkgCache::Version::Foreign)
 740                {
 741                   if (colon == std::string::npos)
 742                      Pkg = Ver.ParentPkg().Group().FindPkg("native");
 743                   else if (strcmp(D->Package.c_str() + colon, ":any") == 0 ||
 744                         strcmp(D->Package.c_str() + colon, ":native") == 0)
 745                      forbidden = "Multi-Arch: foreign";
 746                }
 747                else if ((Ver->MultiArch & pkgCache::Version::Allowed) == pkgCache::Version::Allowed)
 748                {
 749                   if (colon == std::string::npos)
 750                      Pkg = Ver.ParentPkg().Group().FindPkg(hostArch);
 751                   else if (strcmp(D->Package.c_str() + colon, ":any") == 0)
 752                   {
 753                      // prefer any installed over preferred non-installed architectures
 754                      pkgCache::GrpIterator Grp = Ver.ParentPkg().Group();
 755                      // we don't check for version here as we are better of with upgrading than remove and install
 756                      for (Pkg = Grp.PackageList(); Pkg.end() == false; Pkg = Grp.NextPkg(Pkg))
 757                         if (Pkg.CurrentVer().end() == false)
 758                            break;
 759                      if (Pkg.end() == true)
 760                         Pkg = Grp.FindPreferredPkg(true);
 761                   }
 762                   else if (strcmp(D->Package.c_str() + colon, ":native") == 0)
 763                      Pkg = Ver.ParentPkg().Group().FindPkg("native");
 764                }
 765
 766                if (forbidden.empty() == false)
 767                {
 768                   if (_config->FindB("Debug::BuildDeps",false) == true)
 769                      std::cout << D->Package.substr(colon, std::string::npos) << " is not allowed from " << forbidden << " package " << (*D).Package << " (" << Ver.VerStr() << ")" << std::endl;
 770                   continue;
 771                }
 772
 773                //we found a good version
 774                break;
 775             }
 776             if (Ver == verlist.end())
 777             {
 778                if (_config->FindB("Debug::BuildDeps",false) == true)
 779                   std::cout << " No multiarch info as we have no satisfying installed nor candidate for " << D->Package << " on build or host arch" << std::endl;
 780
 781                if (forbidden.empty() == false)
 782                {
 783                   if (hasAlternatives)
 784                      continue;
 785                   return _error->Error(_("%s dependency for %s can't be satisfied "
 786                            "because %s is not allowed on '%s' packages"),
 787                         pkgSrcRecords::Parser::BuildDepType(D->Type), Src.c_str(),
 788                         D->Package.c_str(), forbidden.c_str());
 789                }
 790             }
 791          }
 792          else
 793             Pkg = Cache->FindPkg(D->Package);
 794
 795          if (Pkg.end() == true || (Pkg->VersionList == 0 && Pkg->ProvidesList == 0))
 796          {
 797             if (_config->FindB("Debug::BuildDeps",false) == true)
 798                std::cout << " (not found)" << (*D).Package << std::endl;
 799
 800             if (hasAlternatives)
 801                continue;
 802
 803             return _error->Error(_("%s dependency for %s cannot be satisfied "
 804                      "because the package %s cannot be found"),
 805                   pkgSrcRecords::Parser::BuildDepType(D->Type), Src.c_str(),
 806                   (*D).Package.c_str());
 807          }
 808
 809          pkgCache::VerIterator IV = (*Cache)[Pkg].InstVerIter(*Cache);
 810          if (IV.end() == false)
 811          {
 812             if (_config->FindB("Debug::BuildDeps",false) == true)
 813                std::cout << "  Is installed\n";
 814
 815             if (D->Version.empty() == true ||
 816                   Cache->VS().CheckDep(IV.VerStr(),(*D).Op,(*D).Version.c_str()) == true)
 817             {
 818                skipAlternatives = hasAlternatives;
 819                continue;
 820             }
 821
 822             if (_config->FindB("Debug::BuildDeps",false) == true)
 823                std::cout << "    ...but the installed version doesn't meet the version requirement\n";
 824
 825             if (((*D).Op & pkgCache::Dep::LessEq) == pkgCache::Dep::LessEq)
 826                return _error->Error(_("Failed to satisfy %s dependency for %s: Installed package %s is too new"),
 827                      pkgSrcRecords::Parser::BuildDepType(D->Type), Src.c_str(), Pkg.FullName(true).c_str());
 828          }
 829
 830          // Only consider virtual packages if there is no versioned dependency
 831          if ((*D).Version.empty() == true)
 832          {
 833             /*
 834              * If this is a virtual package, we need to check the list of
 835              * packages that provide it and see if any of those are
 836              * installed
 837              */
 838             pkgCache::PrvIterator Prv = Pkg.ProvidesList();
 839             for (; Prv.end() != true; ++Prv)
 840             {
 841                if (_config->FindB("Debug::BuildDeps",false) == true)
 842                   std::cout << "  Checking provider " << Prv.OwnerPkg().FullName() << std::endl;
 843
 844                if ((*Cache)[Prv.OwnerPkg()].InstVerIter(*Cache).end() == false)
 845                   break;
 846             }
 847
 848             if (Prv.end() == false)
 849             {
 850                if (_config->FindB("Debug::BuildDeps",false) == true)
 851                   std::cout << "  Is provided by installed package " << Prv.OwnerPkg().FullName() << std::endl;
 852                skipAlternatives = hasAlternatives;
 853                continue;
 854             }
 855          }
 856          else // versioned dependency
 857          {
 858             pkgCache::VerIterator CV = (*Cache)[Pkg].CandidateVerIter(*Cache);
 859             if (CV.end() == true ||
 860                   Cache->VS().CheckDep(CV.VerStr(),(*D).Op,(*D).Version.c_str()) == false)
 861             {
 862                if (hasAlternatives)
 863                   continue;
 864                else if (CV.end() == false)
 865                   return _error->Error(_("%s dependency for %s cannot be satisfied "
 866                            "because candidate version of package %s "
 867                            "can't satisfy version requirements"),
 868                         pkgSrcRecords::Parser::BuildDepType(D->Type), Src.c_str(),
 869                         D->Package.c_str());
 870                else
 871                   return _error->Error(_("%s dependency for %s cannot be satisfied "
 872                            "because package %s has no candidate version"),
 873                         pkgSrcRecords::Parser::BuildDepType(D->Type), Src.c_str(),
 874                         D->Package.c_str());
 875             }
 876          }
 877
 878          if (TryToInstallBuildDep(Pkg,Cache,Fix,false,false,false) == true)
 879          {
 880             // We successfully installed something; skip remaining alternatives
 881             skipAlternatives = hasAlternatives;
 882             if(_config->FindB("APT::Get::Build-Dep-Automatic", false) == true)
 883                Cache->MarkAuto(Pkg, true);
 884             continue;
 885          }
 886          else if (hasAlternatives)
 887          {
 888             if (_config->FindB("Debug::BuildDeps",false) == true)
 889                std::cout << "  Unsatisfiable, trying alternatives\n";
 890             continue;
 891          }
 892          else
 893          {
 894             return _error->Error(_("Failed to satisfy %s dependency for %s: %s"),
 895                   pkgSrcRecords::Parser::BuildDepType(D->Type),
 896                   Src.c_str(),
 897                   (*D).Package.c_str());
 898          }
 899       }
 900    }
 901
 902    if (Fix.Resolve(true) == false)
 903       _error->Discard();
 904
 905    // Now we check the state of the packages,
 906    if (Cache->BrokenCount() != 0)
 907    {
 908       ShowBroken(std::cout, Cache, false);
 909       return _error->Error(_("Build-dependencies for %s could not be satisfied."), Src.c_str());
 910    }
 911    return true;
 912 }
 913                                                                         /*}}}*/
 914 // DoBuildDep - Install/removes packages to satisfy build dependencies  /*{{{*/
 915 // ---------------------------------------------------------------------
 916 /* This function will look at the build depends list of the given source
 917    package and install the necessary packages to make it true, or fail. */
 918 static std::vector<pkgSrcRecords::Parser::BuildDepRec> GetBuildDeps(pkgSrcRecords::Parser * const Last,
 919       char const * const Src, bool const StripMultiArch, std::string const &hostArch)
 920 {
 921    std::vector<pkgSrcRecords::Parser::BuildDepRec> BuildDeps;
 922    // FIXME: Can't specify architecture to use for [wildcard] matching, so switch default arch temporary
 923    if (hostArch.empty() == false)
 924    {
 925       std::string nativeArch = _config->Find("APT::Architecture");
 926       _config->Set("APT::Architecture", hostArch);
 927       bool Success = Last->BuildDepends(BuildDeps, _config->FindB("APT::Get::Arch-Only", false), StripMultiArch);
 928       _config->Set("APT::Architecture", nativeArch);
 929       if (Success == false)
 930       {
 931          _error->Error(_("Unable to get build-dependency information for %s"), Src);
 932          return {};
 933       }
 934    }
 935    else if (Last->BuildDepends(BuildDeps, _config->FindB("APT::Get::Arch-Only", false), StripMultiArch) == false)
 936    {
 937       _error->Error(_("Unable to get build-dependency information for %s"), Src);
 938       return {};
 939    }
 940
 941    if (BuildDeps.empty() == true)
 942       ioprintf(c1out,_("%s has no build depends.\n"), Src);
 943
 944    return BuildDeps;
 945 }
 946 bool DoBuildDep(CommandLine &CmdL)
 947 {
 948    CacheFile Cache;
 949    std::vector<char const *> VolatileCmdL;
 950    Cache.GetSourceList()->AddVolatileFiles(CmdL, &VolatileCmdL);
 951
 952    _config->Set("APT::Install-Recommends", false);
 953
 954    bool WantLock = _config->FindB("APT::Get::Print-URIs", false) == false;
 955
 956    if (Cache.Open(WantLock) == false)
 957       return false;
 958
 959    if (CmdL.FileSize() <= 1 && VolatileCmdL.empty())
 960       return _error->Error(_("Must specify at least one package to check builddeps for"));
 961
 962    bool StripMultiArch;
 963    std::string hostArch = _config->Find("APT::Get::Host-Architecture");
 964    if (hostArch.empty() == false)
 965    {
 966       std::vector<std::string> archs = APT::Configuration::getArchitectures();
 967       if (std::find(archs.begin(), archs.end(), hostArch) == archs.end())
 968          return _error->Error(_("No architecture information available for %s. See apt.conf(5) APT::Architectures for setup"), hostArch.c_str());
 969       StripMultiArch = false;
 970    }
 971    else
 972       StripMultiArch = true;
 973
 974    // deal with the build essentials first
 975    {
 976       std::vector<pkgSrcRecords::Parser::BuildDepRec> BuildDeps;
 977
 978       Configuration::Item const *Opts = _config->Tree("APT::Build-Essential");
 979       if (Opts)
 980          Opts = Opts->Child;
 981       for (; Opts; Opts = Opts->Next)
 982       {
 983          if (Opts->Value.empty() == true)
 984             continue;
 985
 986          pkgSrcRecords::Parser::BuildDepRec rec;
 987          rec.Package = Opts->Value;
 988          rec.Type = pkgSrcRecords::Parser::BuildDependIndep;
 989          rec.Op = 0;
 990          BuildDeps.push_back(rec);
 991       }
 992
 993       if (InstallBuildDepsLoop(Cache, "APT::Build-Essential", BuildDeps, StripMultiArch, hostArch) == false)
 994          return false;
 995    }
 996
 997    // Read the source list
 998    if (Cache.BuildSourceList() == false)
 999       return false;
1000    pkgSourceList *List = Cache.GetSourceList();
1001
1002    // FIXME: Avoid volatile sources == cmdline assumption
1003    {
1004       auto const VolatileSources = List->GetVolatileFiles();
1005       if (VolatileSources.size() == VolatileCmdL.size())
1006       {
1007          for (size_t i = 0; i < VolatileSources.size(); ++i)
1008          {
1009             char const * const Src = VolatileCmdL[i];
1010             if (DirectoryExists(Src))
1011                ioprintf(c1out, _("Note, using directory '%s' to get the build dependencies\n"), Src);
1012             else
1013                ioprintf(c1out, _("Note, using file '%s' to get the build dependencies\n"), Src);
1014             std::unique_ptr<pkgSrcRecords::Parser> Last(VolatileSources[i]->CreateSrcParser());
1015             if (Last == nullptr)
1016                return _error->Error(_("Unable to find a source package for %s"), Src);
1017
1018             auto const BuildDeps = GetBuildDeps(Last.get(), Src, StripMultiArch, hostArch);
1019             if (InstallBuildDepsLoop(Cache, Src, BuildDeps, StripMultiArch, hostArch) == false)
1020                return false;
1021          }
1022       }
1023       else
1024          _error->Error("Implementation error: Volatile sources (%lu) and commandline elements (%lu) do not match!", VolatileSources.size(), VolatileCmdL.size());
1025    }
1026
1027    if (CmdL.FileList[1] != 0)
1028    {
1029       // Create the text record parsers
1030       pkgSrcRecords SrcRecs(*List);
1031       if (_error->PendingError() == true)
1032          return false;
1033       for (const char **I = CmdL.FileList + 1; *I != 0; ++I)
1034       {
1035          std::string Src;
1036          pkgSrcRecords::Parser * const Last = FindSrc(*I,SrcRecs,Src,Cache);
1037          if (Last == nullptr)
1038             return _error->Error(_("Unable to find a source package for %s"), *I);
1039
1040          auto const BuildDeps = GetBuildDeps(Last, Src.c_str(), StripMultiArch, hostArch);
1041          if (InstallBuildDepsLoop(Cache, Src, BuildDeps, StripMultiArch, hostArch) == false)
1042             return false;
1043       }
1044    }
1045
1046    if (_error->PendingError() || InstallPackages(Cache, false, true) == false)
1047       return _error->Error(_("Failed to process build dependencies"));
1048    return true;
1049 }
1050                                                                         /*}}}*/