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 #include <apt-pkg/policy.h>
  25
  26 #include <apt-private/private-cachefile.h>
  27 #include <apt-private/private-cacheset.h>
  28 #include <apt-private/private-download.h>
  29 #include <apt-private/private-install.h>
  30 #include <apt-private/private-source.h>
  31
  32 #include <apt-pkg/debindexfile.h>
  33
  34 #include <stddef.h>
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37 #include <string.h>
  38 #include <sys/stat.h>
  39 #include <unistd.h>
  40
  41 #include <iostream>
  42 #include <sstream>
  43 #include <set>
  44 #include <string>
  45 #include <vector>
  46
  47 #include <apti18n.h>
  48                                                                         /*}}}*/
  49
  50 // GetReleaseFileForSourceRecord - Return Suite for the given srcrecord /*{{{*/
  51 static pkgCache::RlsFileIterator GetReleaseFileForSourceRecord(CacheFile &CacheFile,
  52       pkgSourceList const * const SrcList, pkgSrcRecords::Parser const * const Parse)
  53 {
  54    // try to find release
  55    const pkgIndexFile& CurrentIndexFile = Parse->Index();
  56
  57    for (pkgSourceList::const_iterator S = SrcList->begin();
  58          S != SrcList->end(); ++S)
  59    {
  60       std::vector<pkgIndexFile *> *Indexes = (*S)->GetIndexFiles();
  61       for (std::vector<pkgIndexFile *>::const_iterator IF = Indexes->begin();
  62             IF != Indexes->end(); ++IF)
  63       {
  64          if (&CurrentIndexFile == (*IF))
  65             return (*S)->FindInCache(CacheFile, false);
  66       }
  67    }
  68    return pkgCache::RlsFileIterator(CacheFile);
  69 }
  70                                                                         /*}}}*/
  71 // FindSrc - Find a source record                                       /*{{{*/
  72 static pkgSrcRecords::Parser *FindSrc(const char *Name,
  73                                pkgSrcRecords &SrcRecs,std::string &Src,
  74                                CacheFile &Cache)
  75 {
  76    if (Cache.BuildCaches(false) == false)
  77       return nullptr;
  78    std::string VerTag, UserRequestedVerTag;
  79    std::string ArchTag = "";
  80    std::string RelTag = _config->Find("APT::Default-Release");
  81    std::string TmpSrc = Name;
  82
  83    // extract release
  84    size_t found = TmpSrc.find_last_of("/");
  85    if (found != std::string::npos)
  86    {
  87       RelTag = TmpSrc.substr(found+1);
  88       TmpSrc = TmpSrc.substr(0,found);
  89    }
  90    // extract the version
  91    found = TmpSrc.find_last_of("=");
  92    if (found != std::string::npos)
  93    {
  94       VerTag = UserRequestedVerTag = TmpSrc.substr(found+1);
  95       TmpSrc = TmpSrc.substr(0,found);
  96    }
  97    // extract arch
  98    found = TmpSrc.find_last_of(":");
  99    if (found != std::string::npos)
 100    {
 101       ArchTag = TmpSrc.substr(found+1);
 102       TmpSrc = TmpSrc.substr(0,found);
 103    }
 104
 105    /* Lookup the version of the package we would install if we were to
 106       install a version and determine the source package name, then look
 107       in the archive for a source package of the same name. */
 108    bool MatchSrcOnly = _config->FindB("APT::Get::Only-Source");
 109    pkgCache::PkgIterator Pkg;
 110    if (ArchTag != "")
 111       Pkg = Cache.GetPkgCache()->FindPkg(TmpSrc, ArchTag);
 112    else
 113       Pkg = Cache.GetPkgCache()->FindPkg(TmpSrc);
 114
 115    // if we can't find a package but the user qualified with a arch,
 116    // error out here
 117    if (Pkg.end() && ArchTag != "")
 118    {
 119       Src = Name;
 120       _error->Error(_("Can not find a package for architecture '%s'"),
 121             ArchTag.c_str());
 122       return 0;
 123    }
 124
 125    if (MatchSrcOnly == false && Pkg.end() == false)
 126    {
 127       if(VerTag != "" || RelTag != "" || ArchTag != "")
 128       {
 129          bool fuzzy = false;
 130          // we have a default release, try to locate the pkg. we do it like
 131          // this because GetCandidateVer() will not "downgrade", that means
 132          // "apt-get source -t stable apt" won't work on a unstable system
 133          for (pkgCache::VerIterator Ver = Pkg.VersionList();; ++Ver)
 134          {
 135             // try first only exact matches, later fuzzy matches
 136             if (Ver.end() == true)
 137             {
 138                if (fuzzy == true)
 139                   break;
 140                fuzzy = true;
 141                Ver = Pkg.VersionList();
 142                // exit right away from the Pkg.VersionList() loop if we
 143                // don't have any versions
 144                if (Ver.end() == true)
 145                   break;
 146             }
 147
 148             // ignore arches that are not for us
 149             if (ArchTag != "" && Ver.Arch() != ArchTag)
 150                continue;
 151
 152             // pick highest version for the arch unless the user wants
 153             // something else
 154             if (ArchTag != "" && VerTag == "" && RelTag == "")
 155                if(Cache->VS().CmpVersion(VerTag, Ver.VerStr()) < 0)
 156                   VerTag = Ver.VerStr();
 157
 158             // We match against a concrete version (or a part of this version)
 159             if (VerTag.empty() == false &&
 160                   (fuzzy == true || Cache->VS().CmpVersion(VerTag, Ver.VerStr()) != 0) && // exact match
 161                   (fuzzy == false || strncmp(VerTag.c_str(), Ver.VerStr(), VerTag.size()) != 0)) // fuzzy match
 162                continue;
 163
 164             for (pkgCache::VerFileIterator VF = Ver.FileList();
 165                   VF.end() == false; ++VF)
 166             {
 167                /* If this is the status file, and the current version is not the
 168                   version in the status file (ie it is not installed, or somesuch)
 169                   then it is not a candidate for installation, ever. This weeds
 170                   out bogus entries that may be due to config-file states, or
 171                   other. */
 172                if ((VF.File()->Flags & pkgCache::Flag::NotSource) ==
 173                      pkgCache::Flag::NotSource && Pkg.CurrentVer() != Ver)
 174                   continue;
 175
 176                // or we match against a release
 177                if(VerTag.empty() == false ||
 178                      (VF.File().Archive() != 0 && VF.File().Archive() == RelTag) ||
 179                      (VF.File().Codename() != 0 && VF.File().Codename() == RelTag))
 180                {
 181                   // the Version we have is possibly fuzzy or includes binUploads,
 182                   // so we use the Version of the SourcePkg (empty if same as package)
 183                   Src = Ver.SourcePkgName();
 184                   VerTag = Ver.SourceVerStr();
 185                   break;
 186                }
 187             }
 188             if (Src.empty() == false)
 189                break;
 190          }
 191       }
 192
 193       if (Src.empty() == true && ArchTag.empty() == false)
 194       {
 195          if (VerTag.empty() == false)
 196             _error->Error(_("Can not find a package '%s' with version '%s'"),
 197                   Pkg.FullName().c_str(), VerTag.c_str());
 198          if (RelTag.empty() == false)
 199             _error->Error(_("Can not find a package '%s' with release '%s'"),
 200                   Pkg.FullName().c_str(), RelTag.c_str());
 201          Src = Name;
 202          return 0;
 203       }
 204
 205
 206       if (Src.empty() == true)
 207       {
 208          // if we don't have found a fitting package yet so we will
 209          // choose a good candidate and proceed with that.
 210          // Maybe we will find a source later on with the right VerTag
 211          // or RelTag
 212          if (Cache.BuildPolicy() == false)
 213             return nullptr;
 214          pkgPolicy * Policy = dynamic_cast<pkgPolicy*>(Cache.GetPolicy());
 215          if (Policy == nullptr)
 216          {
 217             _error->Fatal("Implementation error: dynamic up-casting policy engine failed in FindSrc!");
 218             return nullptr;
 219          }
 220          pkgCache::VerIterator const Ver = Policy->GetCandidateVer(Pkg);
 221          if (Ver.end() == false)
 222          {
 223             if (strcmp(Ver.SourcePkgName(),Ver.ParentPkg().Name()) != 0)
 224                Src = Ver.SourcePkgName();
 225             if (VerTag.empty() == true && strcmp(Ver.SourceVerStr(),Ver.VerStr()) != 0)
 226                VerTag = Ver.SourceVerStr();
 227          }
 228       }
 229    }
 230
 231    if (Src.empty() == true)
 232    {
 233       Src = TmpSrc;
 234    }
 235    else
 236    {
 237       /* if we have a source pkg name, make sure to only search
 238          for srcpkg names, otherwise apt gets confused if there
 239          is a binary package "pkg1" and a source package "pkg1"
 240          with the same name but that comes from different packages */
 241       MatchSrcOnly = true;
 242       if (Src != TmpSrc)
 243       {
 244          ioprintf(c1out, _("Picking '%s' as source package instead of '%s'\n"), Src.c_str(), TmpSrc.c_str());
 245       }
 246    }
 247
 248    // The best hit
 249    pkgSrcRecords::Parser *Last = 0;
 250    unsigned long Offset = 0;
 251    std::string Version;
 252    pkgSourceList const * const SrcList = Cache.GetSourceList();
 253
 254    /* Iterate over all of the hits, which includes the resulting
 255       binary packages in the search */
 256                pkgSrcRecords::Parser *Parse;
 257                while (true)
 258                {
 259                   SrcRecs.Restart();
 260                   while ((Parse = SrcRecs.Find(Src.c_str(), MatchSrcOnly)) != 0)
 261                   {
 262                      const std::string Ver = Parse->Version();
 263
 264                      // See if we need to look for a specific release tag
 265                      if (RelTag.empty() == false && UserRequestedVerTag.empty() == true)
 266                      {
 267                         pkgCache::RlsFileIterator const Rls = GetReleaseFileForSourceRecord(Cache, SrcList, Parse);
 268                         if (Rls.end() == false)
 269                         {
 270                            if ((Rls->Archive != 0 && RelTag != Rls.Archive()) &&
 271                                  (Rls->Codename != 0 && RelTag != Rls.Codename()))
 272                               continue;
 273                         }
 274                      }
 275
 276                      // Ignore all versions which doesn't fit
 277                      if (VerTag.empty() == false &&
 278                            Cache->VS().CmpVersion(VerTag, Ver) != 0) // exact match
 279                         continue;
 280
 281                      // Newer version or an exact match? Save the hit
 282                      if (Last == 0 || Cache->VS().CmpVersion(Version,Ver) < 0) {
 283                         Last = Parse;
 284                         Offset = Parse->Offset();
 285                         Version = Ver;
 286                      }
 287
 288                      // was the version check above an exact match?
 289                      // If so, we don't need to look further
 290                      if (VerTag.empty() == false && (VerTag == Ver))
 291                         break;
 292                   }
 293                   if (UserRequestedVerTag == "" && Version != "" && RelTag != "")
 294                      ioprintf(c1out, "Selected version '%s' (%s) for %s\n",
 295                            Version.c_str(), RelTag.c_str(), Src.c_str());
 296
 297                   if (Last != 0 || VerTag.empty() == true)
 298                      break;
 299                   _error->Error(_("Can not find version '%s' of package '%s'"), VerTag.c_str(), TmpSrc.c_str());
 300                   return 0;
 301                }
 302
 303                if (Last == 0 || Last->Jump(Offset) == false)
 304                   return 0;
 305
 306                return Last;
 307 }
 308                                                                         /*}}}*/
 309 // DoSource - Fetch a source archive                                    /*{{{*/
 310 // ---------------------------------------------------------------------
 311 /* Fetch souce packages */
 312 struct DscFile
 313 {
 314    std::string Package;
 315    std::string Version;
 316    std::string Dsc;
 317 };
 318 bool DoSource(CommandLine &CmdL)
 319 {
 320    CacheFile Cache;
 321    if (Cache.Open(false) == false)
 322       return false;
 323
 324    if (CmdL.FileSize() <= 1)
 325       return _error->Error(_("Must specify at least one package to fetch source for"));
 326
 327    // Read the source list
 328    if (Cache.BuildSourceList() == false)
 329       return false;
 330    pkgSourceList *List = Cache.GetSourceList();
 331
 332    // Create the text record parsers
 333    pkgSrcRecords SrcRecs(*List);
 334    if (_error->PendingError() == true)
 335       return false;
 336
 337    std::unique_ptr<DscFile[]> Dsc(new DscFile[CmdL.FileSize()]);
 338
 339    // insert all downloaded uris into this set to avoid downloading them
 340    // twice
 341    std::set<std::string> queued;
 342
 343    // Diff only mode only fetches .diff files
 344    bool const diffOnly = _config->FindB("APT::Get::Diff-Only", false);
 345    // Tar only mode only fetches .tar files
 346    bool const tarOnly = _config->FindB("APT::Get::Tar-Only", false);
 347    // Dsc only mode only fetches .dsc files
 348    bool const dscOnly = _config->FindB("APT::Get::Dsc-Only", false);
 349
 350    // Load the requestd sources into the fetcher
 351    aptAcquireWithTextStatus Fetcher;
 352    unsigned J = 0;
 353    std::vector<std::string> UntrustedList;
 354    for (const char **I = CmdL.FileList + 1; *I != 0; I++, J++)
 355    {
 356       std::string Src;
 357       pkgSrcRecords::Parser *Last = FindSrc(*I,SrcRecs,Src,Cache);
 358       if (Last == 0) {
 359          return _error->Error(_("Unable to find a source package for %s"),Src.c_str());
 360       }
 361
 362       if (Last->Index().IsTrusted() == false)
 363          UntrustedList.push_back(Src);
 364
 365       std::string srec = Last->AsStr();
 366       std::string::size_type pos = srec.find("\nVcs-");
 367       while (pos != std::string::npos)
 368       {
 369          pos += strlen("\nVcs-");
 370          std::string vcs = srec.substr(pos,srec.find(":",pos)-pos);
 371          if(vcs == "Browser")
 372          {
 373             pos = srec.find("\nVcs-", pos);
 374             continue;
 375          }
 376          pos += vcs.length()+2;
 377          std::string::size_type epos = srec.find("\n", pos);
 378          std::string const uri = srec.substr(pos,epos-pos);
 379          ioprintf(c1out, _("NOTICE: '%s' packaging is maintained in "
 380                   "the '%s' version control system at:\n"
 381                   "%s\n"),
 382                Src.c_str(), vcs.c_str(), uri.c_str());
 383          std::string vcscmd;
 384          if (vcs == "Bzr")
 385             vcscmd = "bzr branch " + uri;
 386          else if (vcs == "Git")
 387             vcscmd = "git clone " + uri;
 388
 389          if (vcscmd.empty() == false)
 390             ioprintf(c1out,_("Please use:\n%s\n"
 391                      "to retrieve the latest (possibly unreleased) "
 392                      "updates to the package.\n"),
 393                   vcscmd.c_str());
 394          break;
 395       }
 396
 397       // Back track
 398       std::vector<pkgSrcRecords::File2> Lst;
 399       if (Last->Files2(Lst) == false) {
 400          return false;
 401       }
 402
 403       // Load them into the fetcher
 404       for (std::vector<pkgSrcRecords::File2>::const_iterator I = Lst.begin();
 405             I != Lst.end(); ++I)
 406       {
 407          // Try to guess what sort of file it is we are getting.
 408          if (I->Type == "dsc")
 409          {
 410             Dsc[J].Package = Last->Package();
 411             Dsc[J].Version = Last->Version();
 412             Dsc[J].Dsc = flNotDir(I->Path);
 413          }
 414
 415          // Handle the only options so that multiple can be used at once
 416          if (diffOnly == true || tarOnly == true || dscOnly == true)
 417          {
 418             if ((diffOnly == true && I->Type == "diff") ||
 419                   (tarOnly == true && I->Type == "tar") ||
 420                   (dscOnly == true && I->Type == "dsc"))
 421                ; // Fine, we want this file downloaded
 422             else
 423                continue;
 424          }
 425
 426          // don't download the same uri twice (should this be moved to
 427          // the fetcher interface itself?)
 428          if(queued.find(Last->Index().ArchiveURI(I->Path)) != queued.end())
 429             continue;
 430          queued.insert(Last->Index().ArchiveURI(I->Path));
 431
 432          // check if we have a file with that md5 sum already localy
 433          std::string localFile = flNotDir(I->Path);
 434          if (FileExists(localFile) == true)
 435             if(I->Hashes.VerifyFile(localFile) == true)
 436             {
 437                ioprintf(c1out,_("Skipping already downloaded file '%s'\n"),
 438                      localFile.c_str());
 439                continue;
 440             }
 441
 442          // see if we have a hash (Acquire::ForceHash is the only way to have none)
 443          if (I->Hashes.usable() == false && _config->FindB("APT::Get::AllowUnauthenticated",false) == false)
 444          {
 445             ioprintf(c1out, "Skipping download of file '%s' as requested hashsum is not available for authentication\n",
 446                   localFile.c_str());
 447             continue;
 448          }
 449
 450          new pkgAcqFile(&Fetcher,Last->Index().ArchiveURI(I->Path),
 451                I->Hashes, I->FileSize, Last->Index().SourceInfo(*Last,*I), Src);
 452       }
 453    }
 454
 455    // Display statistics
 456    unsigned long long FetchBytes = Fetcher.FetchNeeded();
 457    unsigned long long FetchPBytes = Fetcher.PartialPresent();
 458    unsigned long long DebBytes = Fetcher.TotalNeeded();
 459
 460    if (CheckFreeSpaceBeforeDownload(".", (FetchBytes - FetchPBytes)) == false)
 461       return false;
 462
 463    // Number of bytes
 464    if (DebBytes != FetchBytes)
 465       //TRANSLATOR: The required space between number and unit is already included
 466       // in the replacement strings, so %sB will be correctly translate in e.g. 1,5 MB
 467       ioprintf(c1out,_("Need to get %sB/%sB of source archives.\n"),
 468             SizeToStr(FetchBytes).c_str(),SizeToStr(DebBytes).c_str());
 469    else
 470       //TRANSLATOR: The required space between number and unit is already included
 471       // in the replacement string, so %sB will be correctly translate in e.g. 1,5 MB
 472       ioprintf(c1out,_("Need to get %sB of source archives.\n"),
 473             SizeToStr(DebBytes).c_str());
 474
 475    if (_config->FindB("APT::Get::Simulate",false) == true)
 476    {
 477       for (unsigned I = 0; I != J; I++)
 478          ioprintf(std::cout,_("Fetch source %s\n"),Dsc[I].Package.c_str());
 479       return true;
 480    }
 481
 482    // Just print out the uris an exit if the --print-uris flag was used
 483    if (_config->FindB("APT::Get::Print-URIs") == true)
 484    {
 485       pkgAcquire::UriIterator I = Fetcher.UriBegin();
 486       for (; I != Fetcher.UriEnd(); ++I)
 487          std::cout << '\'' << I->URI << "' " << flNotDir(I->Owner->DestFile) << ' ' <<
 488             I->Owner->FileSize << ' ' << I->Owner->HashSum() << std::endl;
 489       return true;
 490    }
 491
 492    // check authentication status of the source as well
 493    if (UntrustedList.empty() == false && AuthPrompt(UntrustedList, false) == false)
 494       return false;
 495
 496    // Run it
 497    bool Failed = false;
 498    if (AcquireRun(Fetcher, 0, &Failed, NULL) == false || Failed == true)
 499    {
 500       return _error->Error(_("Failed to fetch some archives."));
 501    }
 502
 503    if (_config->FindB("APT::Get::Download-only",false) == true)
 504    {
 505       c1out << _("Download complete and in download only mode") << std::endl;
 506       return true;
 507    }
 508
 509    // Unpack the sources
 510    pid_t Process = ExecFork();
 511
 512    if (Process == 0)
 513    {
 514       bool const fixBroken = _config->FindB("APT::Get::Fix-Broken", false);
 515       for (unsigned I = 0; I != J; ++I)
 516       {
 517          std::string Dir = Dsc[I].Package + '-' + Cache->VS().UpstreamVersion(Dsc[I].Version.c_str());
 518
 519          // Diff only mode only fetches .diff files
 520          if (_config->FindB("APT::Get::Diff-Only",false) == true ||
 521                _config->FindB("APT::Get::Tar-Only",false) == true ||
 522                Dsc[I].Dsc.empty() == true)
 523             continue;
 524
 525          // See if the package is already unpacked
 526          struct stat Stat;
 527          if (fixBroken == false && stat(Dir.c_str(),&Stat) == 0 &&
 528                S_ISDIR(Stat.st_mode) != 0)
 529          {
 530             ioprintf(c0out ,_("Skipping unpack of already unpacked source in %s\n"),
 531                   Dir.c_str());
 532          }
 533          else
 534          {
 535             // Call dpkg-source
 536             std::string const sourceopts = _config->Find("DPkg::Source-Options", "-x");
 537             std::string S;
 538             strprintf(S, "%s %s %s",
 539                   _config->Find("Dir::Bin::dpkg-source","dpkg-source").c_str(),
 540                   sourceopts.c_str(), Dsc[I].Dsc.c_str());
 541             if (system(S.c_str()) != 0)
 542             {
 543                fprintf(stderr, _("Unpack command '%s' failed.\n"), S.c_str());
 544                fprintf(stderr, _("Check if the 'dpkg-dev' package is installed.\n"));
 545                _exit(1);
 546             }
 547          }
 548
 549          // Try to compile it with dpkg-buildpackage
 550          if (_config->FindB("APT::Get::Compile",false) == true)
 551          {
 552             std::string buildopts = _config->Find("APT::Get::Host-Architecture");
 553             if (buildopts.empty() == false)
 554                buildopts = "-a" + buildopts + " ";
 555
 556             // get all active build profiles
 557             std::string const profiles = APT::Configuration::getBuildProfilesString();
 558             if (profiles.empty() == false)
 559                buildopts.append(" -P").append(profiles).append(" ");
 560
 561             buildopts.append(_config->Find("DPkg::Build-Options","-b -uc"));
 562
 563             // Call dpkg-buildpackage
 564             std::string S;
 565             strprintf(S, "cd %s && %s %s",
 566                   Dir.c_str(),
 567                   _config->Find("Dir::Bin::dpkg-buildpackage","dpkg-buildpackage").c_str(),
 568                   buildopts.c_str());
 569
 570             if (system(S.c_str()) != 0)
 571             {
 572                fprintf(stderr, _("Build command '%s' failed.\n"), S.c_str());
 573                _exit(1);
 574             }
 575          }
 576       }
 577
 578       _exit(0);
 579    }
 580
 581    return ExecWait(Process, "dpkg-source");
 582 }
 583                                                                         /*}}}*/
 584 // DoBuildDep - Install/removes packages to satisfy build dependencies  /*{{{*/
 585 // ---------------------------------------------------------------------
 586 /* This function will look at the build depends list of the given source
 587    package and install the necessary packages to make it true, or fail. */
 588 static std::vector<pkgSrcRecords::Parser::BuildDepRec> GetBuildDeps(pkgSrcRecords::Parser * const Last,
 589       char const * const Src, bool const StripMultiArch, std::string const &hostArch)
 590 {
 591    std::vector<pkgSrcRecords::Parser::BuildDepRec> BuildDeps;
 592    // FIXME: Can't specify architecture to use for [wildcard] matching, so switch default arch temporary
 593    if (hostArch.empty() == false)
 594    {
 595       std::string nativeArch = _config->Find("APT::Architecture");
 596       _config->Set("APT::Architecture", hostArch);
 597       bool Success = Last->BuildDepends(BuildDeps, _config->FindB("APT::Get::Arch-Only", false), StripMultiArch);
 598       _config->Set("APT::Architecture", nativeArch);
 599       if (Success == false)
 600       {
 601          _error->Error(_("Unable to get build-dependency information for %s"), Src);
 602          return {};
 603       }
 604    }
 605    else if (Last->BuildDepends(BuildDeps, _config->FindB("APT::Get::Arch-Only", false), StripMultiArch) == false)
 606    {
 607       _error->Error(_("Unable to get build-dependency information for %s"), Src);
 608       return {};
 609    }
 610
 611    if (BuildDeps.empty() == true)
 612       ioprintf(c1out,_("%s has no build depends.\n"), Src);
 613
 614    return BuildDeps;
 615 }
 616 static void WriteBuildDependencyPackage(std::ostringstream &buildDepsPkgFile,
 617       std::string const &PkgName, std::string const &Arch,
 618       std::vector<pkgSrcRecords::Parser::BuildDepRec> const &Dependencies)
 619 {
 620    buildDepsPkgFile << "Package: " << PkgName << "\n"
 621       << "Architecture: " << Arch << "\n"
 622       << "Version: 1\n";
 623
 624    std::string depends, conflicts;
 625    for (auto const &dep: Dependencies)
 626    {
 627       std::string * type;
 628       if (dep.Type == pkgSrcRecords::Parser::BuildConflict || dep.Type == pkgSrcRecords::Parser::BuildConflictIndep)
 629          type = &conflicts;
 630       else
 631          type = &depends;
 632
 633       type->append(" ").append(dep.Package);
 634       if (dep.Version.empty() ==  false)
 635          type->append(" (").append(pkgCache::CompTypeDeb(dep.Op)).append(" ").append(dep.Version).append(")");
 636       if ((dep.Op & pkgCache::Dep::Or) == pkgCache::Dep::Or)
 637       {
 638          type->append("\n  |");
 639       }
 640       else
 641          type->append(",\n");
 642    }
 643    if (depends.empty() == false)
 644       buildDepsPkgFile << "Depends:\n" << depends;
 645    if (conflicts.empty() == false)
 646       buildDepsPkgFile << "Conflicts:\n" << conflicts;
 647    buildDepsPkgFile << "\n";
 648 }
 649 bool DoBuildDep(CommandLine &CmdL)
 650 {
 651    CacheFile Cache;
 652    std::vector<char const *> VolatileCmdL;
 653    Cache.GetSourceList()->AddVolatileFiles(CmdL, &VolatileCmdL);
 654
 655    _config->Set("APT::Install-Recommends", false);
 656
 657    if (CmdL.FileSize() <= 1 && VolatileCmdL.empty())
 658       return _error->Error(_("Must specify at least one package to check builddeps for"));
 659
 660    bool StripMultiArch;
 661    std::string hostArch = _config->Find("APT::Get::Host-Architecture");
 662    if (hostArch.empty() == false)
 663    {
 664       std::vector<std::string> archs = APT::Configuration::getArchitectures();
 665       if (std::find(archs.begin(), archs.end(), hostArch) == archs.end())
 666          return _error->Error(_("No architecture information available for %s. See apt.conf(5) APT::Architectures for setup"), hostArch.c_str());
 667       StripMultiArch = false;
 668    }
 669    else
 670       StripMultiArch = true;
 671
 672    std::ostringstream buildDepsPkgFile;
 673    std::vector<std::pair<std::string,std::string>> pseudoPkgs;
 674    // deal with the build essentials first
 675    {
 676       std::vector<pkgSrcRecords::Parser::BuildDepRec> BuildDeps;
 677       Configuration::Item const *Opts = _config->Tree("APT::Build-Essential");
 678       if (Opts)
 679          Opts = Opts->Child;
 680       for (; Opts; Opts = Opts->Next)
 681       {
 682          if (Opts->Value.empty() == true)
 683             continue;
 684
 685          pkgSrcRecords::Parser::BuildDepRec rec;
 686          rec.Package = Opts->Value;
 687          rec.Type = pkgSrcRecords::Parser::BuildDependIndep;
 688          rec.Op = 0;
 689          BuildDeps.push_back(rec);
 690       }
 691       std::string const pseudo = "builddeps:essentials";
 692       std::string const nativeArch = _config->Find("APT::Architecture");
 693       WriteBuildDependencyPackage(buildDepsPkgFile, pseudo, nativeArch, BuildDeps);
 694       pseudoPkgs.emplace_back(pseudo, nativeArch);
 695    }
 696
 697    // Read the source list
 698    if (Cache.BuildSourceList() == false)
 699       return false;
 700    pkgSourceList *List = Cache.GetSourceList();
 701    std::string const pseudoArch = hostArch.empty() ? _config->Find("APT::Architecture") : hostArch;
 702
 703    // FIXME: Avoid volatile sources == cmdline assumption
 704    {
 705       auto const VolatileSources = List->GetVolatileFiles();
 706       if (VolatileSources.size() == VolatileCmdL.size())
 707       {
 708          for (size_t i = 0; i < VolatileSources.size(); ++i)
 709          {
 710             char const * const Src = VolatileCmdL[i];
 711             if (DirectoryExists(Src))
 712                ioprintf(c1out, _("Note, using directory '%s' to get the build dependencies\n"), Src);
 713             else
 714                ioprintf(c1out, _("Note, using file '%s' to get the build dependencies\n"), Src);
 715             std::unique_ptr<pkgSrcRecords::Parser> Last(VolatileSources[i]->CreateSrcParser());
 716             if (Last == nullptr)
 717                return _error->Error(_("Unable to find a source package for %s"), Src);
 718
 719             std::string const pseudo = std::string("builddeps:") + Src;
 720             WriteBuildDependencyPackage(buildDepsPkgFile, pseudo, pseudoArch,
 721                   GetBuildDeps(Last.get(), Src, StripMultiArch, hostArch));
 722             pseudoPkgs.emplace_back(pseudo, pseudoArch);
 723          }
 724       }
 725       else
 726          return _error->Error("Implementation error: Volatile sources (%lu) and"
 727                "commandline elements (%lu) do not match!", VolatileSources.size(),
 728                VolatileCmdL.size());
 729    }
 730
 731    if (CmdL.FileList[1] != 0)
 732    {
 733       // Create the text record parsers
 734       pkgSrcRecords SrcRecs(*List);
 735       if (_error->PendingError() == true)
 736          return false;
 737       for (const char **I = CmdL.FileList + 1; *I != 0; ++I)
 738       {
 739          std::string Src;
 740          pkgSrcRecords::Parser * const Last = FindSrc(*I,SrcRecs,Src,Cache);
 741          if (Last == nullptr)
 742             return _error->Error(_("Unable to find a source package for %s"), *I);
 743
 744          std::string const pseudo = std::string("builddeps:") + Src;
 745          WriteBuildDependencyPackage(buildDepsPkgFile, pseudo, pseudoArch,
 746                GetBuildDeps(Last, Src.c_str(), StripMultiArch, hostArch));
 747          pseudoPkgs.emplace_back(pseudo, pseudoArch);
 748       }
 749    }
 750
 751    Cache.AddIndexFile(new debStringPackageIndex(buildDepsPkgFile.str()));
 752
 753    bool WantLock = _config->FindB("APT::Get::Print-URIs", false) == false;
 754    if (Cache.Open(WantLock) == false)
 755       return false;
 756    pkgProblemResolver Fix(Cache.GetDepCache());
 757
 758    APT::PackageVector removeAgain;
 759    {
 760       pkgDepCache::ActionGroup group(Cache);
 761       TryToInstall InstallAction(Cache, &Fix, false);
 762       for (auto const &pkg: pseudoPkgs)
 763       {
 764          pkgCache::PkgIterator const Pkg = Cache->FindPkg(pkg.first, pkg.second);
 765          if (Pkg.end())
 766             continue;
 767          Cache->SetCandidateVersion(Pkg.VersionList());
 768          InstallAction(Cache[Pkg].CandidateVerIter(Cache));
 769          removeAgain.push_back(Pkg);
 770       }
 771       InstallAction.doAutoInstall();
 772
 773       OpTextProgress Progress(*_config);
 774       bool const resolver_fail = Fix.Resolve(true, &Progress);
 775       if (resolver_fail == false && Cache->BrokenCount() == 0)
 776          return false;
 777       if (CheckNothingBroken(Cache) == false)
 778          return false;
 779    }
 780    if (DoAutomaticRemove(Cache) == false)
 781       return false;
 782    {
 783       pkgDepCache::ActionGroup group(Cache);
 784       for (auto const &pkg: removeAgain)
 785          Cache->MarkDelete(pkg, false, 0, true);
 786    }
 787
 788    pseudoPkgs.clear();
 789    if (_error->PendingError() || InstallPackages(Cache, false, true) == false)
 790       return _error->Error(_("Failed to process build dependencies"));
 791    return true;
 792 }
 793                                                                         /*}}}*/