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.GetPkgCache()->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.GetPkgCache()->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.GetPkgCache()->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.GetPkgCache()->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    if (CmdL.FileSize() <= 1)
 321       return _error->Error(_("Must specify at least one package to fetch source for"));
 322
 323    CacheFile Cache;
 324    // Read the source list
 325    if (Cache.BuildSourceList() == false)
 326       return false;
 327    pkgSourceList *List = Cache.GetSourceList();
 328
 329    // Create the text record parsers
 330    pkgSrcRecords SrcRecs(*List);
 331    if (_error->PendingError() == true)
 332       return false;
 333
 334    std::unique_ptr<DscFile[]> Dsc(new DscFile[CmdL.FileSize()]);
 335
 336    // insert all downloaded uris into this set to avoid downloading them
 337    // twice
 338    std::set<std::string> queued;
 339
 340    // Diff only mode only fetches .diff files
 341    bool const diffOnly = _config->FindB("APT::Get::Diff-Only", false);
 342    // Tar only mode only fetches .tar files
 343    bool const tarOnly = _config->FindB("APT::Get::Tar-Only", false);
 344    // Dsc only mode only fetches .dsc files
 345    bool const dscOnly = _config->FindB("APT::Get::Dsc-Only", false);
 346
 347    // Load the requestd sources into the fetcher
 348    aptAcquireWithTextStatus Fetcher;
 349    unsigned J = 0;
 350    std::vector<std::string> UntrustedList;
 351    for (const char **I = CmdL.FileList + 1; *I != 0; I++, J++)
 352    {
 353       std::string Src;
 354       pkgSrcRecords::Parser *Last = FindSrc(*I,SrcRecs,Src,Cache);
 355       if (Last == 0) {
 356          return _error->Error(_("Unable to find a source package for %s"),Src.c_str());
 357       }
 358
 359       if (Last->Index().IsTrusted() == false)
 360          UntrustedList.push_back(Src);
 361
 362       std::string srec = Last->AsStr();
 363       std::string::size_type pos = srec.find("\nVcs-");
 364       while (pos != std::string::npos)
 365       {
 366          pos += strlen("\nVcs-");
 367          std::string vcs = srec.substr(pos,srec.find(":",pos)-pos);
 368          if(vcs == "Browser")
 369          {
 370             pos = srec.find("\nVcs-", pos);
 371             continue;
 372          }
 373          pos += vcs.length()+2;
 374          std::string::size_type epos = srec.find("\n", pos);
 375          std::string const uri = srec.substr(pos,epos-pos);
 376          ioprintf(c1out, _("NOTICE: '%s' packaging is maintained in "
 377                   "the '%s' version control system at:\n"
 378                   "%s\n"),
 379                Src.c_str(), vcs.c_str(), uri.c_str());
 380          std::string vcscmd;
 381          if (vcs == "Bzr")
 382             vcscmd = "bzr branch " + uri;
 383          else if (vcs == "Git")
 384             vcscmd = "git clone " + uri;
 385
 386          if (vcscmd.empty() == false)
 387             ioprintf(c1out,_("Please use:\n%s\n"
 388                      "to retrieve the latest (possibly unreleased) "
 389                      "updates to the package.\n"),
 390                   vcscmd.c_str());
 391          break;
 392       }
 393
 394       // Back track
 395       std::vector<pkgSrcRecords::File2> Lst;
 396       if (Last->Files2(Lst) == false) {
 397          return false;
 398       }
 399
 400       // Load them into the fetcher
 401       for (std::vector<pkgSrcRecords::File2>::const_iterator I = Lst.begin();
 402             I != Lst.end(); ++I)
 403       {
 404          // Try to guess what sort of file it is we are getting.
 405          if (I->Type == "dsc")
 406          {
 407             Dsc[J].Package = Last->Package();
 408             Dsc[J].Version = Last->Version();
 409             Dsc[J].Dsc = flNotDir(I->Path);
 410          }
 411
 412          // Handle the only options so that multiple can be used at once
 413          if (diffOnly == true || tarOnly == true || dscOnly == true)
 414          {
 415             if ((diffOnly == true && I->Type == "diff") ||
 416                   (tarOnly == true && I->Type == "tar") ||
 417                   (dscOnly == true && I->Type == "dsc"))
 418                ; // Fine, we want this file downloaded
 419             else
 420                continue;
 421          }
 422
 423          // don't download the same uri twice (should this be moved to
 424          // the fetcher interface itself?)
 425          if(queued.find(Last->Index().ArchiveURI(I->Path)) != queued.end())
 426             continue;
 427          queued.insert(Last->Index().ArchiveURI(I->Path));
 428
 429          // check if we have a file with that md5 sum already localy
 430          std::string localFile = flNotDir(I->Path);
 431          if (FileExists(localFile) == true)
 432             if(I->Hashes.VerifyFile(localFile) == true)
 433             {
 434                ioprintf(c1out,_("Skipping already downloaded file '%s'\n"),
 435                      localFile.c_str());
 436                continue;
 437             }
 438
 439          // see if we have a hash (Acquire::ForceHash is the only way to have none)
 440          if (I->Hashes.usable() == false && _config->FindB("APT::Get::AllowUnauthenticated",false) == false)
 441          {
 442             ioprintf(c1out, "Skipping download of file '%s' as requested hashsum is not available for authentication\n",
 443                   localFile.c_str());
 444             continue;
 445          }
 446
 447          new pkgAcqFile(&Fetcher,Last->Index().ArchiveURI(I->Path),
 448                I->Hashes, I->FileSize, Last->Index().SourceInfo(*Last,*I), Src);
 449       }
 450    }
 451
 452    // Display statistics
 453    unsigned long long FetchBytes = Fetcher.FetchNeeded();
 454    unsigned long long FetchPBytes = Fetcher.PartialPresent();
 455    unsigned long long DebBytes = Fetcher.TotalNeeded();
 456
 457    if (CheckFreeSpaceBeforeDownload(".", (FetchBytes - FetchPBytes)) == false)
 458       return false;
 459
 460    // Number of bytes
 461    if (DebBytes != FetchBytes)
 462       //TRANSLATOR: The required space between number and unit is already included
 463       // in the replacement strings, so %sB will be correctly translate in e.g. 1,5 MB
 464       ioprintf(c1out,_("Need to get %sB/%sB of source archives.\n"),
 465             SizeToStr(FetchBytes).c_str(),SizeToStr(DebBytes).c_str());
 466    else
 467       //TRANSLATOR: The required space between number and unit is already included
 468       // in the replacement string, so %sB will be correctly translate in e.g. 1,5 MB
 469       ioprintf(c1out,_("Need to get %sB of source archives.\n"),
 470             SizeToStr(DebBytes).c_str());
 471
 472    if (_config->FindB("APT::Get::Simulate",false) == true)
 473    {
 474       for (unsigned I = 0; I != J; I++)
 475          ioprintf(std::cout,_("Fetch source %s\n"),Dsc[I].Package.c_str());
 476       return true;
 477    }
 478
 479    // Just print out the uris an exit if the --print-uris flag was used
 480    if (_config->FindB("APT::Get::Print-URIs") == true)
 481    {
 482       pkgAcquire::UriIterator I = Fetcher.UriBegin();
 483       for (; I != Fetcher.UriEnd(); ++I)
 484          std::cout << '\'' << I->URI << "' " << flNotDir(I->Owner->DestFile) << ' ' <<
 485             I->Owner->FileSize << ' ' << I->Owner->HashSum() << std::endl;
 486       return true;
 487    }
 488
 489    // check authentication status of the source as well
 490    if (UntrustedList.empty() == false && AuthPrompt(UntrustedList, false) == false)
 491       return false;
 492
 493    // Run it
 494    bool Failed = false;
 495    if (AcquireRun(Fetcher, 0, &Failed, NULL) == false || Failed == true)
 496    {
 497       return _error->Error(_("Failed to fetch some archives."));
 498    }
 499
 500    if (_config->FindB("APT::Get::Download-only",false) == true)
 501    {
 502       c1out << _("Download complete and in download only mode") << std::endl;
 503       return true;
 504    }
 505
 506    // Unpack the sources
 507    pid_t Process = ExecFork();
 508
 509    if (Process == 0)
 510    {
 511       bool const fixBroken = _config->FindB("APT::Get::Fix-Broken", false);
 512       for (unsigned I = 0; I != J; ++I)
 513       {
 514          std::string Dir = Dsc[I].Package + '-' + Cache.GetPkgCache()->VS->UpstreamVersion(Dsc[I].Version.c_str());
 515
 516          // Diff only mode only fetches .diff files
 517          if (_config->FindB("APT::Get::Diff-Only",false) == true ||
 518                _config->FindB("APT::Get::Tar-Only",false) == true ||
 519                Dsc[I].Dsc.empty() == true)
 520             continue;
 521
 522          // See if the package is already unpacked
 523          struct stat Stat;
 524          if (fixBroken == false && stat(Dir.c_str(),&Stat) == 0 &&
 525                S_ISDIR(Stat.st_mode) != 0)
 526          {
 527             ioprintf(c0out ,_("Skipping unpack of already unpacked source in %s\n"),
 528                   Dir.c_str());
 529          }
 530          else
 531          {
 532             // Call dpkg-source
 533             std::string const sourceopts = _config->Find("DPkg::Source-Options", "-x");
 534             std::string S;
 535             strprintf(S, "%s %s %s",
 536                   _config->Find("Dir::Bin::dpkg-source","dpkg-source").c_str(),
 537                   sourceopts.c_str(), Dsc[I].Dsc.c_str());
 538             if (system(S.c_str()) != 0)
 539             {
 540                fprintf(stderr, _("Unpack command '%s' failed.\n"), S.c_str());
 541                fprintf(stderr, _("Check if the 'dpkg-dev' package is installed.\n"));
 542                _exit(1);
 543             }
 544          }
 545
 546          // Try to compile it with dpkg-buildpackage
 547          if (_config->FindB("APT::Get::Compile",false) == true)
 548          {
 549             std::string buildopts = _config->Find("APT::Get::Host-Architecture");
 550             if (buildopts.empty() == false)
 551                buildopts = "-a" + buildopts + " ";
 552
 553             // get all active build profiles
 554             std::string const profiles = APT::Configuration::getBuildProfilesString();
 555             if (profiles.empty() == false)
 556                buildopts.append(" -P").append(profiles).append(" ");
 557
 558             buildopts.append(_config->Find("DPkg::Build-Options","-b -uc"));
 559
 560             // Call dpkg-buildpackage
 561             std::string S;
 562             strprintf(S, "cd %s && %s %s",
 563                   Dir.c_str(),
 564                   _config->Find("Dir::Bin::dpkg-buildpackage","dpkg-buildpackage").c_str(),
 565                   buildopts.c_str());
 566
 567             if (system(S.c_str()) != 0)
 568             {
 569                fprintf(stderr, _("Build command '%s' failed.\n"), S.c_str());
 570                _exit(1);
 571             }
 572          }
 573       }
 574
 575       _exit(0);
 576    }
 577
 578    return ExecWait(Process, "dpkg-source");
 579 }
 580                                                                         /*}}}*/
 581 // DoBuildDep - Install/removes packages to satisfy build dependencies  /*{{{*/
 582 // ---------------------------------------------------------------------
 583 /* This function will look at the build depends list of the given source
 584    package and install the necessary packages to make it true, or fail. */
 585 static std::vector<pkgSrcRecords::Parser::BuildDepRec> GetBuildDeps(pkgSrcRecords::Parser * const Last,
 586       char const * const Src, bool const StripMultiArch, std::string const &hostArch)
 587 {
 588    std::vector<pkgSrcRecords::Parser::BuildDepRec> BuildDeps;
 589    // FIXME: Can't specify architecture to use for [wildcard] matching, so switch default arch temporary
 590    if (hostArch.empty() == false)
 591    {
 592       std::string nativeArch = _config->Find("APT::Architecture");
 593       _config->Set("APT::Architecture", hostArch);
 594       bool Success = Last->BuildDepends(BuildDeps, _config->FindB("APT::Get::Arch-Only", false), StripMultiArch);
 595       _config->Set("APT::Architecture", nativeArch);
 596       if (Success == false)
 597       {
 598          _error->Error(_("Unable to get build-dependency information for %s"), Src);
 599          return {};
 600       }
 601    }
 602    else if (Last->BuildDepends(BuildDeps, _config->FindB("APT::Get::Arch-Only", false), StripMultiArch) == false)
 603    {
 604       _error->Error(_("Unable to get build-dependency information for %s"), Src);
 605       return {};
 606    }
 607
 608    if (BuildDeps.empty() == true)
 609       ioprintf(c1out,_("%s has no build depends.\n"), Src);
 610
 611    return BuildDeps;
 612 }
 613 static void WriteBuildDependencyPackage(std::ostringstream &buildDepsPkgFile,
 614       std::string const &PkgName, std::string const &Arch,
 615       std::vector<pkgSrcRecords::Parser::BuildDepRec> const &Dependencies)
 616 {
 617    buildDepsPkgFile << "Package: " << PkgName << "\n"
 618       << "Architecture: " << Arch << "\n"
 619       << "Version: 1\n";
 620
 621    std::string depends, conflicts;
 622    for (auto const &dep: Dependencies)
 623    {
 624       std::string * type;
 625       if (dep.Type == pkgSrcRecords::Parser::BuildConflict || dep.Type == pkgSrcRecords::Parser::BuildConflictIndep)
 626          type = &conflicts;
 627       else
 628          type = &depends;
 629
 630       type->append(" ").append(dep.Package);
 631       if (dep.Version.empty() ==  false)
 632          type->append(" (").append(pkgCache::CompTypeDeb(dep.Op)).append(" ").append(dep.Version).append(")");
 633       if ((dep.Op & pkgCache::Dep::Or) == pkgCache::Dep::Or)
 634       {
 635          type->append("\n  |");
 636       }
 637       else
 638          type->append(",\n");
 639    }
 640    if (depends.empty() == false)
 641       buildDepsPkgFile << "Depends:\n" << depends;
 642    if (conflicts.empty() == false)
 643       buildDepsPkgFile << "Conflicts:\n" << conflicts;
 644    buildDepsPkgFile << "\n";
 645 }
 646 bool DoBuildDep(CommandLine &CmdL)
 647 {
 648    CacheFile Cache;
 649    std::vector<char const *> VolatileCmdL;
 650    Cache.GetSourceList()->AddVolatileFiles(CmdL, &VolatileCmdL);
 651
 652    _config->Set("APT::Install-Recommends", false);
 653
 654    if (CmdL.FileSize() <= 1 && VolatileCmdL.empty())
 655       return _error->Error(_("Must specify at least one package to check builddeps for"));
 656
 657    bool StripMultiArch;
 658    std::string hostArch = _config->Find("APT::Get::Host-Architecture");
 659    if (hostArch.empty() == false)
 660    {
 661       std::vector<std::string> archs = APT::Configuration::getArchitectures();
 662       if (std::find(archs.begin(), archs.end(), hostArch) == archs.end())
 663          return _error->Error(_("No architecture information available for %s. See apt.conf(5) APT::Architectures for setup"), hostArch.c_str());
 664       StripMultiArch = false;
 665    }
 666    else
 667       StripMultiArch = true;
 668
 669    std::ostringstream buildDepsPkgFile;
 670    std::vector<std::pair<std::string,std::string>> pseudoPkgs;
 671    // deal with the build essentials first
 672    {
 673       std::vector<pkgSrcRecords::Parser::BuildDepRec> BuildDeps;
 674       Configuration::Item const *Opts = _config->Tree("APT::Build-Essential");
 675       if (Opts)
 676          Opts = Opts->Child;
 677       for (; Opts; Opts = Opts->Next)
 678       {
 679          if (Opts->Value.empty() == true)
 680             continue;
 681
 682          pkgSrcRecords::Parser::BuildDepRec rec;
 683          rec.Package = Opts->Value;
 684          rec.Type = pkgSrcRecords::Parser::BuildDependIndep;
 685          rec.Op = 0;
 686          BuildDeps.push_back(rec);
 687       }
 688       std::string const pseudo = "builddeps:essentials";
 689       std::string const nativeArch = _config->Find("APT::Architecture");
 690       WriteBuildDependencyPackage(buildDepsPkgFile, pseudo, nativeArch, BuildDeps);
 691       pseudoPkgs.emplace_back(pseudo, nativeArch);
 692    }
 693
 694    // Read the source list
 695    if (Cache.BuildSourceList() == false)
 696       return false;
 697    pkgSourceList *List = Cache.GetSourceList();
 698    std::string const pseudoArch = hostArch.empty() ? _config->Find("APT::Architecture") : hostArch;
 699
 700    // FIXME: Avoid volatile sources == cmdline assumption
 701    {
 702       auto const VolatileSources = List->GetVolatileFiles();
 703       if (VolatileSources.size() == VolatileCmdL.size())
 704       {
 705          for (size_t i = 0; i < VolatileSources.size(); ++i)
 706          {
 707             char const * const Src = VolatileCmdL[i];
 708             if (DirectoryExists(Src))
 709                ioprintf(c1out, _("Note, using directory '%s' to get the build dependencies\n"), Src);
 710             else
 711                ioprintf(c1out, _("Note, using file '%s' to get the build dependencies\n"), Src);
 712             std::unique_ptr<pkgSrcRecords::Parser> Last(VolatileSources[i]->CreateSrcParser());
 713             if (Last == nullptr)
 714                return _error->Error(_("Unable to find a source package for %s"), Src);
 715
 716             std::string const pseudo = std::string("builddeps:") + Src;
 717             WriteBuildDependencyPackage(buildDepsPkgFile, pseudo, pseudoArch,
 718                   GetBuildDeps(Last.get(), Src, StripMultiArch, hostArch));
 719             pseudoPkgs.emplace_back(pseudo, pseudoArch);
 720          }
 721       }
 722       else
 723          return _error->Error("Implementation error: Volatile sources (%lu) and"
 724                "commandline elements (%lu) do not match!", VolatileSources.size(),
 725                VolatileCmdL.size());
 726    }
 727
 728    if (CmdL.FileList[1] != 0)
 729    {
 730       // Create the text record parsers
 731       pkgSrcRecords SrcRecs(*List);
 732       if (_error->PendingError() == true)
 733          return false;
 734       for (const char **I = CmdL.FileList + 1; *I != 0; ++I)
 735       {
 736          std::string Src;
 737          pkgSrcRecords::Parser * const Last = FindSrc(*I,SrcRecs,Src,Cache);
 738          if (Last == nullptr)
 739             return _error->Error(_("Unable to find a source package for %s"), *I);
 740
 741          std::string const pseudo = std::string("builddeps:") + Src;
 742          WriteBuildDependencyPackage(buildDepsPkgFile, pseudo, pseudoArch,
 743                GetBuildDeps(Last, Src.c_str(), StripMultiArch, hostArch));
 744          pseudoPkgs.emplace_back(pseudo, pseudoArch);
 745       }
 746    }
 747
 748    Cache.AddIndexFile(new debStringPackageIndex(buildDepsPkgFile.str()));
 749
 750    bool WantLock = _config->FindB("APT::Get::Print-URIs", false) == false;
 751    if (Cache.Open(WantLock) == false)
 752       return false;
 753    pkgProblemResolver Fix(Cache.GetDepCache());
 754
 755    APT::PackageVector removeAgain;
 756    {
 757       pkgDepCache::ActionGroup group(Cache);
 758       TryToInstall InstallAction(Cache, &Fix, false);
 759       for (auto const &pkg: pseudoPkgs)
 760       {
 761          pkgCache::PkgIterator const Pkg = Cache->FindPkg(pkg.first, pkg.second);
 762          if (Pkg.end())
 763             continue;
 764          Cache->SetCandidateVersion(Pkg.VersionList());
 765          InstallAction(Cache[Pkg].CandidateVerIter(Cache));
 766          removeAgain.push_back(Pkg);
 767       }
 768       InstallAction.doAutoInstall();
 769
 770       OpTextProgress Progress(*_config);
 771       bool const resolver_fail = Fix.Resolve(true, &Progress);
 772       if (resolver_fail == false && Cache->BrokenCount() == 0)
 773          return false;
 774       if (CheckNothingBroken(Cache) == false)
 775          return false;
 776    }
 777    if (DoAutomaticRemove(Cache) == false)
 778       return false;
 779    {
 780       pkgDepCache::ActionGroup group(Cache);
 781       for (auto const &pkg: removeAgain)
 782          Cache->MarkDelete(pkg, false, 0, true);
 783    }
 784
 785    pseudoPkgs.clear();
 786    if (_error->PendingError() || InstallPackages(Cache, false, true) == false)
 787       return _error->Error(_("Failed to process build dependencies"));
 788    return true;
 789 }
 790                                                                         /*}}}*/