apt-pkg/cacheset.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 /* ######################################################################
   4
   5    Simple wrapper around a std::set to provide a similar interface to
   6    a set of cache structures as to the complete set of all structures
   7    in the pkgCache. Currently only Package is supported.
   8
   9    ##################################################################### */
  10                                                                         /*}}}*/
  11 // Include Files                                                        /*{{{*/
  12 #include <config.h>
  13
  14 #include <apt-pkg/aptconfiguration.h>
  15 #include <apt-pkg/cachefile.h>
  16 #include <apt-pkg/cachefilter.h>
  17 #include <apt-pkg/cacheset.h>
  18 #include <apt-pkg/error.h>
  19 #include <apt-pkg/versionmatch.h>
  20 #include <apt-pkg/pkgrecords.h>
  21 #include <apt-pkg/policy.h>
  22 #include <apt-pkg/cacheiterators.h>
  23 #include <apt-pkg/configuration.h>
  24 #include <apt-pkg/depcache.h>
  25 #include <apt-pkg/macros.h>
  26 #include <apt-pkg/pkgcache.h>
  27 #include <apt-pkg/fileutl.h>
  28
  29 #include <stddef.h>
  30 #include <stdio.h>
  31 #include <string.h>
  32 #include <regex.h>
  33 #include <list>
  34 #include <string>
  35 #include <vector>
  36
  37 #include <apti18n.h>
  38                                                                         /*}}}*/
  39 namespace APT {
  40 // PackageFrom - selecting the appropriate method for package selection /*{{{*/
  41 bool CacheSetHelper::PackageFrom(enum PkgSelector const select, PackageContainerInterface * const pci,
  42       pkgCacheFile &Cache, std::string const &pattern) {
  43         switch (select) {
  44         case UNKNOWN: return false;
  45         case REGEX: return PackageFromRegEx(pci, Cache, pattern);
  46         case TASK: return PackageFromTask(pci, Cache, pattern);
  47         case FNMATCH: return PackageFromFnmatch(pci, Cache, pattern);
  48         case PACKAGENAME: return PackageFromPackageName(pci, Cache, pattern);
  49         case STRING: return PackageFromString(pci, Cache, pattern);
  50         }
  51         return false;
  52 }
  53                                                                         /*}}}*/
  54 // PackageFromTask - Return all packages in the cache from a specific task /*{{{*/
  55 bool CacheSetHelper::PackageFromTask(PackageContainerInterface * const pci, pkgCacheFile &Cache, std::string pattern) {
  56         size_t const archfound = pattern.find_last_of(':');
  57         std::string arch = "native";
  58         if (archfound != std::string::npos) {
  59                 arch = pattern.substr(archfound+1);
  60                 pattern.erase(archfound);
  61         }
  62
  63         if (pattern[pattern.length() -1] != '^')
  64                 return false;
  65         pattern.erase(pattern.length()-1);
  66
  67         if (unlikely(Cache.GetPkgCache() == 0 || Cache.GetDepCache() == 0))
  68                 return false;
  69
  70         bool const wasEmpty = pci->empty();
  71         if (wasEmpty == true)
  72                 pci->setConstructor(CacheSetHelper::TASK);
  73
  74         // get the records
  75         pkgRecords Recs(Cache);
  76
  77         // build regexp for the task
  78         regex_t Pattern;
  79         char S[300];
  80         snprintf(S, sizeof(S), "^Task:.*[, ]%s([, ]|$)", pattern.c_str());
  81         if(regcomp(&Pattern,S, REG_EXTENDED | REG_NOSUB | REG_NEWLINE) != 0) {
  82                 _error->Error("Failed to compile task regexp");
  83                 return false;
  84         }
  85
  86         bool found = false;
  87         for (pkgCache::GrpIterator Grp = Cache->GrpBegin(); Grp.end() == false; ++Grp) {
  88                 pkgCache::PkgIterator Pkg = Grp.FindPkg(arch);
  89                 if (Pkg.end() == true)
  90                         continue;
  91                 pkgCache::VerIterator ver = Cache[Pkg].CandidateVerIter(Cache);
  92                 if(ver.end() == true)
  93                         continue;
  94
  95                 pkgRecords::Parser &parser = Recs.Lookup(ver.FileList());
  96                 const char *start, *end;
  97                 parser.GetRec(start,end);
  98                 unsigned int const length = end - start;
  99                 if (unlikely(length == 0))
 100                    continue;
 101                 char buf[length];
 102                 strncpy(buf, start, length);
 103                 buf[length-1] = '\0';
 104                 if (regexec(&Pattern, buf, 0, 0, 0) != 0)
 105                         continue;
 106
 107                 pci->insert(Pkg);
 108                 showPackageSelection(Pkg, CacheSetHelper::TASK, pattern);
 109                 found = true;
 110         }
 111         regfree(&Pattern);
 112
 113         if (found == false) {
 114                 canNotFindPackage(CacheSetHelper::TASK, pci, Cache, pattern);
 115                 pci->setConstructor(CacheSetHelper::UNKNOWN);
 116                 return false;
 117         }
 118
 119         if (wasEmpty == false && pci->getConstructor() != CacheSetHelper::UNKNOWN)
 120                 pci->setConstructor(CacheSetHelper::UNKNOWN);
 121
 122         return true;
 123 }
 124                                                                         /*}}}*/
 125 // PackageFromRegEx - Return all packages in the cache matching a pattern /*{{{*/
 126 bool CacheSetHelper::PackageFromRegEx(PackageContainerInterface * const pci, pkgCacheFile &Cache, std::string pattern) {
 127         static const char * const isregex = ".?+*|[^$";
 128         if (pattern.find_first_of(isregex) == std::string::npos)
 129                 return false;
 130
 131         bool const wasEmpty = pci->empty();
 132         if (wasEmpty == true)
 133                 pci->setConstructor(CacheSetHelper::REGEX);
 134
 135         size_t archfound = pattern.find_last_of(':');
 136         std::string arch = "native";
 137         if (archfound != std::string::npos) {
 138                 arch = pattern.substr(archfound+1);
 139                 if (arch.find_first_of(isregex) == std::string::npos)
 140                         pattern.erase(archfound);
 141                 else
 142                         arch = "native";
 143         }
 144
 145         if (unlikely(Cache.GetPkgCache() == 0))
 146                 return false;
 147
 148         APT::CacheFilter::PackageNameMatchesRegEx regexfilter(pattern);
 149
 150         bool found = false;
 151         for (pkgCache::GrpIterator Grp = Cache.GetPkgCache()->GrpBegin(); Grp.end() == false; ++Grp) {
 152                 if (regexfilter(Grp) == false)
 153                         continue;
 154                 pkgCache::PkgIterator Pkg = Grp.FindPkg(arch);
 155                 if (Pkg.end() == true) {
 156                         if (archfound == std::string::npos) {
 157                                 std::vector<std::string> archs = APT::Configuration::getArchitectures();
 158                                 for (std::vector<std::string>::const_iterator a = archs.begin();
 159                                      a != archs.end() && Pkg.end() != true; ++a)
 160                                         Pkg = Grp.FindPkg(*a);
 161                         }
 162                         if (Pkg.end() == true)
 163                                 continue;
 164                 }
 165
 166                 pci->insert(Pkg);
 167                 showPackageSelection(Pkg, CacheSetHelper::REGEX, pattern);
 168                 found = true;
 169         }
 170
 171         if (found == false) {
 172                 canNotFindPackage(CacheSetHelper::REGEX, pci, Cache, pattern);
 173                 pci->setConstructor(CacheSetHelper::UNKNOWN);
 174                 return false;
 175         }
 176
 177         if (wasEmpty == false && pci->getConstructor() != CacheSetHelper::UNKNOWN)
 178                 pci->setConstructor(CacheSetHelper::UNKNOWN);
 179
 180         return true;
 181 }
 182                                                                         /*}}}*/
 183 // PackageFromFnmatch - Returns the package defined  by this fnmatch    /*{{{*/
 184 bool CacheSetHelper::PackageFromFnmatch(PackageContainerInterface * const pci,
 185                                        pkgCacheFile &Cache, std::string pattern)
 186 {
 187         static const char * const isfnmatch = ".?*[]!";
 188         if (pattern.find_first_of(isfnmatch) == std::string::npos)
 189                 return false;
 190
 191         bool const wasEmpty = pci->empty();
 192         if (wasEmpty == true)
 193                 pci->setConstructor(CacheSetHelper::FNMATCH);
 194
 195         size_t archfound = pattern.find_last_of(':');
 196         std::string arch = "native";
 197         if (archfound != std::string::npos) {
 198                 arch = pattern.substr(archfound+1);
 199                 if (arch.find_first_of(isfnmatch) == std::string::npos)
 200                         pattern.erase(archfound);
 201                 else
 202                         arch = "native";
 203         }
 204
 205         if (unlikely(Cache.GetPkgCache() == 0))
 206                 return false;
 207
 208         APT::CacheFilter::PackageNameMatchesFnmatch filter(pattern);
 209
 210         bool found = false;
 211         for (pkgCache::GrpIterator Grp = Cache.GetPkgCache()->GrpBegin(); Grp.end() == false; ++Grp) {
 212                 if (filter(Grp) == false)
 213                         continue;
 214                 pkgCache::PkgIterator Pkg = Grp.FindPkg(arch);
 215                 if (Pkg.end() == true) {
 216                         if (archfound == std::string::npos) {
 217                                 std::vector<std::string> archs = APT::Configuration::getArchitectures();
 218                                 for (std::vector<std::string>::const_iterator a = archs.begin();
 219                                      a != archs.end() && Pkg.end() != true; ++a)
 220                                         Pkg = Grp.FindPkg(*a);
 221                         }
 222                         if (Pkg.end() == true)
 223                                 continue;
 224                 }
 225
 226                 pci->insert(Pkg);
 227                 showPackageSelection(Pkg, CacheSetHelper::FNMATCH, pattern);
 228                 found = true;
 229         }
 230
 231         if (found == false) {
 232                 canNotFindPackage(CacheSetHelper::FNMATCH, pci, Cache, pattern);
 233                 pci->setConstructor(CacheSetHelper::UNKNOWN);
 234                 return false;
 235         }
 236
 237         if (wasEmpty == false && pci->getConstructor() != CacheSetHelper::UNKNOWN)
 238                 pci->setConstructor(CacheSetHelper::UNKNOWN);
 239
 240         return true;
 241 }
 242                                                                         /*}}}*/
 243 // PackageFromName - Returns the package defined  by this string        /*{{{*/
 244 pkgCache::PkgIterator CacheSetHelper::PackageFromName(pkgCacheFile &Cache,
 245                         std::string const &str) {
 246         std::string pkg = str;
 247         size_t archfound = pkg.find_last_of(':');
 248         std::string arch;
 249         if (archfound != std::string::npos) {
 250                 arch = pkg.substr(archfound+1);
 251                 pkg.erase(archfound);
 252         }
 253
 254         if (Cache.GetPkgCache() == 0)
 255                 return pkgCache::PkgIterator(Cache, 0);
 256
 257         pkgCache::PkgIterator Pkg(Cache, 0);
 258         if (arch.empty() == true) {
 259                 pkgCache::GrpIterator Grp = Cache.GetPkgCache()->FindGrp(pkg);
 260                 if (Grp.end() == false)
 261                         Pkg = Grp.FindPreferredPkg();
 262         } else
 263                 Pkg = Cache.GetPkgCache()->FindPkg(pkg, arch);
 264
 265         if (Pkg.end() == true)
 266                 return canNotFindPkgName(Cache, str);
 267         return Pkg;
 268 }
 269                                                                         /*}}}*/
 270 // PackageFromPackageName - Returns the package defined  by this string /*{{{*/
 271 bool CacheSetHelper::PackageFromPackageName(PackageContainerInterface * const pci, pkgCacheFile &Cache,
 272                         std::string pkg) {
 273         if (unlikely(Cache.GetPkgCache() == 0))
 274                 return false;
 275
 276         size_t const archfound = pkg.find_last_of(':');
 277         std::string arch;
 278         if (archfound != std::string::npos) {
 279                 arch = pkg.substr(archfound+1);
 280                 pkg.erase(archfound);
 281                 if (arch == "all" || arch == "native")
 282                         arch = _config->Find("APT::Architecture");
 283         }
 284
 285         pkgCache::GrpIterator Grp = Cache.GetPkgCache()->FindGrp(pkg);
 286         if (Grp.end() == false) {
 287                 if (arch.empty() == true) {
 288                         pkgCache::PkgIterator Pkg = Grp.FindPreferredPkg();
 289                         if (Pkg.end() == false)
 290                         {
 291                            pci->insert(Pkg);
 292                            return true;
 293                         }
 294                 } else {
 295                         bool found = false;
 296                         // for 'linux-any' return the first package matching, for 'linux-*' return all matches
 297                         bool const isGlobal = arch.find('*') != std::string::npos;
 298                         APT::CacheFilter::PackageArchitectureMatchesSpecification pams(arch);
 299                         for (pkgCache::PkgIterator Pkg = Grp.PackageList(); Pkg.end() == false; Pkg = Grp.NextPkg(Pkg)) {
 300                                 if (pams(Pkg) == false)
 301                                         continue;
 302                                 pci->insert(Pkg);
 303                                 found = true;
 304                                 if (isGlobal == false)
 305                                         break;
 306                         }
 307                         if (found == true)
 308                                 return true;
 309                 }
 310         }
 311
 312         pkgCache::PkgIterator Pkg = canNotFindPkgName(Cache, pkg);
 313         if (Pkg.end() == true)
 314            return false;
 315
 316         pci->insert(Pkg);
 317         return true;
 318 }
 319                                                                         /*}}}*/
 320 // PackageFromString - Return all packages matching a specific string   /*{{{*/
 321 bool CacheSetHelper::PackageFromString(PackageContainerInterface * const pci, pkgCacheFile &Cache, std::string const &str) {
 322         bool found = true;
 323         _error->PushToStack();
 324
 325         if (PackageFrom(CacheSetHelper::PACKAGENAME, pci, Cache, str) == false &&
 326                  PackageFrom(CacheSetHelper::TASK, pci, Cache, str) == false &&
 327                  // FIXME: hm, hm, regexp/fnmatch incompatible?
 328                  PackageFrom(CacheSetHelper::FNMATCH, pci, Cache, str) == false &&
 329                  PackageFrom(CacheSetHelper::REGEX, pci, Cache, str) == false)
 330         {
 331                 canNotFindPackage(CacheSetHelper::PACKAGENAME, pci, Cache, str);
 332                 found = false;
 333         }
 334
 335         if (found == true)
 336                 _error->RevertToStack();
 337         else
 338                 _error->MergeWithStack();
 339         return found;
 340 }
 341                                                                         /*}}}*/
 342 // PackageFromCommandLine - Return all packages specified on commandline /*{{{*/
 343 bool CacheSetHelper::PackageFromCommandLine(PackageContainerInterface * const pci, pkgCacheFile &Cache, const char **cmdline) {
 344         bool found = false;
 345         for (const char **I = cmdline; *I != 0; ++I)
 346                 found |= PackageFrom(CacheSetHelper::PACKAGENAME, pci, Cache, *I);
 347         return found;
 348 }
 349                                                                         /*}}}*/
 350 // FromModifierCommandLine - helper doing the work for PKG:GroupedFromCommandLine       /*{{{*/
 351 bool CacheSetHelper::PackageFromModifierCommandLine(unsigned short &modID, PackageContainerInterface * const pci,
 352                                                         pkgCacheFile &Cache, const char * cmdline,
 353                                                         std::list<PkgModifier> const &mods) {
 354         std::string str = cmdline;
 355         unsigned short fallback = modID;
 356         bool modifierPresent = false;
 357         for (std::list<PkgModifier>::const_iterator mod = mods.begin();
 358              mod != mods.end(); ++mod) {
 359                 size_t const alength = strlen(mod->Alias);
 360                 switch(mod->Pos) {
 361                 case PkgModifier::POSTFIX:
 362                         if (str.compare(str.length() - alength, alength,
 363                                         mod->Alias, 0, alength) != 0)
 364                                 continue;
 365                         str.erase(str.length() - alength);
 366                         modID = mod->ID;
 367                         break;
 368                 case PkgModifier::PREFIX:
 369                         continue;
 370                 case PkgModifier::NONE:
 371                         continue;
 372                 }
 373                 modifierPresent = true;
 374                 break;
 375         }
 376         if (modifierPresent == true) {
 377                 bool const errors = showErrors(false);
 378                 bool const found = PackageFrom(PACKAGENAME, pci, Cache, cmdline);
 379                 showErrors(errors);
 380                 if (found == true) {
 381                         modID = fallback;
 382                         return true;
 383                 }
 384         }
 385         return PackageFrom(CacheSetHelper::PACKAGENAME, pci, Cache, str);
 386 }
 387                                                                         /*}}}*/
 388 // FromModifierCommandLine - helper doing the work for VER:GroupedFromCommandLine       /*{{{*/
 389 bool VersionContainerInterface::FromModifierCommandLine(unsigned short &modID,
 390                                                         VersionContainerInterface * const vci,
 391                                                         pkgCacheFile &Cache, const char * cmdline,
 392                                                         std::list<Modifier> const &mods,
 393                                                         CacheSetHelper &helper) {
 394         CacheSetHelper::VerSelector select = CacheSetHelper::NEWEST;
 395         std::string str = cmdline;
 396         if (unlikely(str.empty() == true))
 397                 return false;
 398         bool modifierPresent = false;
 399         unsigned short fallback = modID;
 400         for (std::list<Modifier>::const_iterator mod = mods.begin();
 401              mod != mods.end(); ++mod) {
 402                 if (modID == fallback && mod->ID == fallback)
 403                         select = mod->SelectVersion;
 404                 size_t const alength = strlen(mod->Alias);
 405                 switch(mod->Pos) {
 406                 case Modifier::POSTFIX:
 407                         if (str.length() <= alength ||
 408                               str.compare(str.length() - alength, alength, mod->Alias, 0, alength) != 0)
 409                                 continue;
 410                         str.erase(str.length() - alength);
 411                         modID = mod->ID;
 412                         select = mod->SelectVersion;
 413                         break;
 414                 case Modifier::PREFIX:
 415                         continue;
 416                 case Modifier::NONE:
 417                         continue;
 418                 }
 419                 modifierPresent = true;
 420                 break;
 421         }
 422         if (modifierPresent == true) {
 423                 bool const errors = helper.showErrors(false);
 424                 bool const found = VersionContainerInterface::FromString(vci, Cache, cmdline, select, helper, true);
 425                 helper.showErrors(errors);
 426                 if (found == true) {
 427                         modID = fallback;
 428                         return true;
 429                 }
 430         }
 431         return FromString(vci, Cache, str, select, helper);
 432 }
 433                                                                         /*}}}*/
 434 // FromCommandLine - Return all versions specified on commandline       /*{{{*/
 435 bool VersionContainerInterface::FromCommandLine(VersionContainerInterface * const vci,
 436                                                 pkgCacheFile &Cache, const char **cmdline,
 437                                                 CacheSetHelper::VerSelector const fallback,
 438                                                 CacheSetHelper &helper) {
 439         bool found = false;
 440         for (const char **I = cmdline; *I != 0; ++I)
 441                 found |= VersionContainerInterface::FromString(vci, Cache, *I, fallback, helper);
 442         return found;
 443 }
 444                                                                         /*}}}*/
 445 // FromString - Returns all versions spedcified by a string             /*{{{*/
 446 bool VersionContainerInterface::FromString(VersionContainerInterface * const vci,
 447                                            pkgCacheFile &Cache, std::string pkg,
 448                                            CacheSetHelper::VerSelector const fallback,
 449                                            CacheSetHelper &helper,
 450                                            bool const onlyFromName) {
 451         PackageSet pkgset;
 452         if(FileExists(pkg)) {
 453                 helper.PackageFrom(CacheSetHelper::STRING, &pkgset, Cache, pkg);
 454                 if(pkgset.empty() == true)
 455                         return false;
 456                 return VersionContainerInterface::FromPackage(vci, Cache, pkgset.begin(), fallback, helper);
 457         }
 458
 459         std::string ver;
 460         bool verIsRel = false;
 461         size_t const vertag = pkg.find_last_of("/=");
 462         if (vertag != std::string::npos) {
 463                 ver = pkg.substr(vertag+1);
 464                 verIsRel = (pkg[vertag] == '/');
 465                 pkg.erase(vertag);
 466         }
 467         if (onlyFromName == false)
 468                 helper.PackageFrom(CacheSetHelper::STRING, &pkgset, Cache, pkg);
 469         else {
 470                 helper.PackageFrom(CacheSetHelper::PACKAGENAME, &pkgset, Cache, pkg);
 471         }
 472
 473         bool errors = true;
 474         if (pkgset.getConstructor() != CacheSetHelper::UNKNOWN)
 475                 errors = helper.showErrors(false);
 476
 477         bool found = false;
 478         for (PackageSet::const_iterator P = pkgset.begin();
 479              P != pkgset.end(); ++P) {
 480                 if (vertag == std::string::npos) {
 481                         found |= VersionContainerInterface::FromPackage(vci, Cache, P, fallback, helper);
 482                         continue;
 483                 }
 484                 pkgCache::VerIterator V;
 485                 if (ver == "installed")
 486                         V = getInstalledVer(Cache, P, helper);
 487                 else if (ver == "candidate")
 488                         V = getCandidateVer(Cache, P, helper);
 489                 else if (ver == "newest") {
 490                         if (P->VersionList != 0)
 491                                 V = P.VersionList();
 492                         else
 493                                 V = helper.canNotGetVersion(CacheSetHelper::NEWEST, Cache, P);
 494                 } else {
 495                         pkgVersionMatch Match(ver, (verIsRel == true ? pkgVersionMatch::Release :
 496                                         pkgVersionMatch::Version));
 497                         V = Match.Find(P);
 498                         if (V.end() == true) {
 499                                 if (verIsRel == true)
 500                                         _error->Error(_("Release '%s' for '%s' was not found"),
 501                                                         ver.c_str(), P.FullName(true).c_str());
 502                                 else
 503                                         _error->Error(_("Version '%s' for '%s' was not found"),
 504                                                         ver.c_str(), P.FullName(true).c_str());
 505                                 continue;
 506                         }
 507                 }
 508                 if (V.end() == true)
 509                         continue;
 510                 if (verIsRel == true)
 511                         helper.showVersionSelection(P, V, CacheSetHelper::RELEASE, ver);
 512                 else
 513                         helper.showVersionSelection(P, V, CacheSetHelper::VERSIONNUMBER, ver);
 514                 vci->insert(V);
 515                 found = true;
 516         }
 517         if (pkgset.getConstructor() != CacheSetHelper::UNKNOWN)
 518                 helper.showErrors(errors);
 519         return found;
 520 }
 521                                                                         /*}}}*/
 522 // FromPackage - versions from package based on fallback                /*{{{*/
 523 bool VersionContainerInterface::FromPackage(VersionContainerInterface * const vci,
 524                                             pkgCacheFile &Cache,
 525                                             pkgCache::PkgIterator const &P,
 526                                             CacheSetHelper::VerSelector const fallback,
 527                                             CacheSetHelper &helper) {
 528         pkgCache::VerIterator V;
 529         bool showErrors;
 530         bool found = false;
 531         switch(fallback) {
 532         case CacheSetHelper::ALL:
 533                 if (P->VersionList != 0)
 534                         for (V = P.VersionList(); V.end() != true; ++V)
 535                                 found |= vci->insert(V);
 536                 else
 537                         helper.canNotFindVersion(CacheSetHelper::ALL, vci, Cache, P);
 538                 break;
 539         case CacheSetHelper::CANDANDINST:
 540                 found |= vci->insert(getInstalledVer(Cache, P, helper));
 541                 found |= vci->insert(getCandidateVer(Cache, P, helper));
 542                 break;
 543         case CacheSetHelper::CANDIDATE:
 544                 found |= vci->insert(getCandidateVer(Cache, P, helper));
 545                 break;
 546         case CacheSetHelper::INSTALLED:
 547                 found |= vci->insert(getInstalledVer(Cache, P, helper));
 548                 break;
 549         case CacheSetHelper::CANDINST:
 550                 showErrors = helper.showErrors(false);
 551                 V = getCandidateVer(Cache, P, helper);
 552                 if (V.end() == true)
 553                         V = getInstalledVer(Cache, P, helper);
 554                 helper.showErrors(showErrors);
 555                 if (V.end() == false)
 556                         found |= vci->insert(V);
 557                 else
 558                         helper.canNotFindVersion(CacheSetHelper::CANDINST, vci, Cache, P);
 559                 break;
 560         case CacheSetHelper::INSTCAND:
 561                 showErrors = helper.showErrors(false);
 562                 V = getInstalledVer(Cache, P, helper);
 563                 if (V.end() == true)
 564                         V = getCandidateVer(Cache, P, helper);
 565                 helper.showErrors(showErrors);
 566                 if (V.end() == false)
 567                         found |= vci->insert(V);
 568                 else
 569                         helper.canNotFindVersion(CacheSetHelper::INSTCAND, vci, Cache, P);
 570                 break;
 571         case CacheSetHelper::NEWEST:
 572                 if (P->VersionList != 0)
 573                         found |= vci->insert(P.VersionList());
 574                 else
 575                         helper.canNotFindVersion(CacheSetHelper::NEWEST, vci, Cache, P);
 576                 break;
 577         case CacheSetHelper::RELEASE:
 578         case CacheSetHelper::VERSIONNUMBER:
 579                 // both make no sense here, so always false
 580                 return false;
 581         }
 582         return found;
 583 }
 584                                                                         /*}}}*/
 585 // getCandidateVer - Returns the candidate version of the given package /*{{{*/
 586 pkgCache::VerIterator VersionContainerInterface::getCandidateVer(pkgCacheFile &Cache,
 587                 pkgCache::PkgIterator const &Pkg, CacheSetHelper &helper) {
 588         pkgCache::VerIterator Cand;
 589         if (Cache.IsPolicyBuilt() == true || Cache.IsDepCacheBuilt() == false) {
 590                 if (unlikely(Cache.GetPolicy() == 0))
 591                         return pkgCache::VerIterator(Cache);
 592                 Cand = Cache.GetPolicy()->GetCandidateVer(Pkg);
 593         } else {
 594                 Cand = Cache[Pkg].CandidateVerIter(Cache);
 595         }
 596         if (Cand.end() == true)
 597                 return helper.canNotGetVersion(CacheSetHelper::CANDIDATE, Cache, Pkg);
 598         return Cand;
 599 }
 600                                                                         /*}}}*/
 601 // getInstalledVer - Returns the installed version of the given package /*{{{*/
 602 pkgCache::VerIterator VersionContainerInterface::getInstalledVer(pkgCacheFile &Cache,
 603                 pkgCache::PkgIterator const &Pkg, CacheSetHelper &helper) {
 604         if (Pkg->CurrentVer == 0)
 605                 return helper.canNotGetVersion(CacheSetHelper::INSTALLED, Cache, Pkg);
 606         return Pkg.CurrentVer();
 607 }
 608                                                                         /*}}}*/
 609
 610 // canNotFindPackage - with the given selector and pattern              /*{{{*/
 611 void CacheSetHelper::canNotFindPackage(enum PkgSelector const select,
 612       PackageContainerInterface * const pci, pkgCacheFile &Cache,
 613       std::string const &pattern) {
 614         switch (select) {
 615 APT_IGNORE_DEPRECATED_PUSH
 616         case REGEX: canNotFindRegEx(pci, Cache, pattern); break;
 617         case TASK: canNotFindTask(pci, Cache, pattern); break;
 618         case FNMATCH: canNotFindFnmatch(pci, Cache, pattern); break;
 619         case PACKAGENAME: canNotFindPackage(pci, Cache, pattern); break;
 620         case STRING: canNotFindPackage(pci, Cache, pattern); break;
 621         case UNKNOWN: break;
 622 APT_IGNORE_DEPRECATED_POP
 623         }
 624 }
 625 // canNotFindTask - handle the case no package is found for a task      /*{{{*/
 626 void CacheSetHelper::canNotFindTask(PackageContainerInterface * const /*pci*/, pkgCacheFile &/*Cache*/, std::string pattern) {
 627         if (ShowError == true)
 628                 _error->Insert(ErrorType, _("Couldn't find task '%s'"), pattern.c_str());
 629 }
 630                                                                         /*}}}*/
 631 // canNotFindRegEx - handle the case no package is found by a regex     /*{{{*/
 632 void CacheSetHelper::canNotFindRegEx(PackageContainerInterface * const /*pci*/, pkgCacheFile &/*Cache*/, std::string pattern) {
 633         if (ShowError == true)
 634                 _error->Insert(ErrorType, _("Couldn't find any package by regex '%s'"), pattern.c_str());
 635 }
 636                                                                         /*}}}*/
 637 // canNotFindFnmatch - handle the case no package is found by a fnmatch /*{{{*/
 638    void CacheSetHelper::canNotFindFnmatch(PackageContainerInterface * const /*pci*/, pkgCacheFile &/*Cache*/, std::string pattern) {
 639         if (ShowError == true)
 640                 _error->Insert(ErrorType, _("Couldn't find any package by glob '%s'"), pattern.c_str());
 641 }
 642                                                                         /*}}}*/
 643 // canNotFindPackage - handle the case no package is found from a string/*{{{*/
 644 APT_CONST void CacheSetHelper::canNotFindPackage(PackageContainerInterface * const /*pci*/, pkgCacheFile &/*Cache*/, std::string const &/*str*/) {
 645 }
 646                                                                         /*}}}*/
 647                                                                         /*}}}*/
 648 // canNotFindPkgName - handle the case no package has this name         /*{{{*/
 649 pkgCache::PkgIterator CacheSetHelper::canNotFindPkgName(pkgCacheFile &Cache,
 650                         std::string const &str) {
 651         if (ShowError == true)
 652                 _error->Insert(ErrorType, _("Unable to locate package %s"), str.c_str());
 653         return pkgCache::PkgIterator(Cache, 0);
 654 }
 655                                                                         /*}}}*/
 656 // canNotFindVersion - for package by selector                          /*{{{*/
 657 void CacheSetHelper::canNotFindVersion(enum VerSelector const select, VersionContainerInterface * const vci, pkgCacheFile &Cache, pkgCache::PkgIterator const &Pkg)
 658 {
 659         switch (select) {
 660 APT_IGNORE_DEPRECATED_PUSH
 661         case ALL: canNotFindAllVer(vci, Cache, Pkg); break;
 662         case INSTCAND: canNotFindInstCandVer(vci, Cache, Pkg); break;
 663         case CANDINST: canNotFindCandInstVer(vci, Cache, Pkg); break;
 664         case NEWEST: canNotFindNewestVer(Cache, Pkg); break;
 665         case CANDIDATE: canNotFindCandidateVer(Cache, Pkg); break;
 666         case INSTALLED: canNotFindInstalledVer(Cache, Pkg); break;
 667 APT_IGNORE_DEPRECATED_POP
 668         case CANDANDINST: canNotGetCandInstVer(Cache, Pkg); break;
 669         case RELEASE:
 670         case VERSIONNUMBER:
 671                 // invalid in this branch
 672                 break;
 673         }
 674 }
 675 // canNotFindAllVer                                                     /*{{{*/
 676 void CacheSetHelper::canNotFindAllVer(VersionContainerInterface * const /*vci*/, pkgCacheFile &/*Cache*/,
 677                 pkgCache::PkgIterator const &Pkg) {
 678         if (ShowError == true)
 679                 _error->Insert(ErrorType, _("Can't select versions from package '%s' as it is purely virtual"), Pkg.FullName(true).c_str());
 680 }
 681                                                                         /*}}}*/
 682 // canNotFindInstCandVer                                                /*{{{*/
 683 void CacheSetHelper::canNotFindInstCandVer(VersionContainerInterface * const /*vci*/, pkgCacheFile &Cache,
 684                 pkgCache::PkgIterator const &Pkg) {
 685         canNotGetInstCandVer(Cache, Pkg);
 686 }
 687                                                                         /*}}}*/
 688 // canNotFindInstCandVer                                                /*{{{*/
 689 void CacheSetHelper::canNotFindCandInstVer(VersionContainerInterface * const /*vci*/, pkgCacheFile &Cache,
 690                 pkgCache::PkgIterator const &Pkg) {
 691         canNotGetCandInstVer(Cache, Pkg);
 692 }
 693                                                                         /*}}}*/
 694                                                                         /*}}}*/
 695 // canNotGetVersion - for package by selector                           /*{{{*/
 696 pkgCache::VerIterator CacheSetHelper::canNotGetVersion(enum VerSelector const select, pkgCacheFile &Cache, pkgCache::PkgIterator const &Pkg) {
 697         switch (select) {
 698 APT_IGNORE_DEPRECATED_PUSH
 699         case NEWEST: return canNotFindNewestVer(Cache, Pkg);
 700         case CANDIDATE: return canNotFindCandidateVer(Cache, Pkg);
 701         case INSTALLED: return canNotFindInstalledVer(Cache, Pkg);
 702 APT_IGNORE_DEPRECATED_POP
 703         case CANDINST: return canNotGetCandInstVer(Cache, Pkg);
 704         case INSTCAND: return canNotGetInstCandVer(Cache, Pkg);
 705         case ALL:
 706         case CANDANDINST:
 707         case RELEASE:
 708         case VERSIONNUMBER:
 709                 // invalid in this branch
 710                 return pkgCache::VerIterator(Cache, 0);
 711         }
 712         return pkgCache::VerIterator(Cache, 0);
 713 }
 714 // canNotFindNewestVer                                                  /*{{{*/
 715 pkgCache::VerIterator CacheSetHelper::canNotFindNewestVer(pkgCacheFile &Cache,
 716                 pkgCache::PkgIterator const &Pkg) {
 717         if (ShowError == true)
 718                 _error->Insert(ErrorType, _("Can't select newest version from package '%s' as it is purely virtual"), Pkg.FullName(true).c_str());
 719         return pkgCache::VerIterator(Cache, 0);
 720 }
 721                                                                         /*}}}*/
 722 // canNotFindCandidateVer                                               /*{{{*/
 723 pkgCache::VerIterator CacheSetHelper::canNotFindCandidateVer(pkgCacheFile &Cache,
 724                 pkgCache::PkgIterator const &Pkg) {
 725         if (ShowError == true)
 726                 _error->Insert(ErrorType, _("Can't select candidate version from package %s as it has no candidate"), Pkg.FullName(true).c_str());
 727         return pkgCache::VerIterator(Cache, 0);
 728 }
 729                                                                         /*}}}*/
 730 // canNotFindInstalledVer                                               /*{{{*/
 731 pkgCache::VerIterator CacheSetHelper::canNotFindInstalledVer(pkgCacheFile &Cache,
 732                 pkgCache::PkgIterator const &Pkg) {
 733         if (ShowError == true)
 734                 _error->Insert(ErrorType, _("Can't select installed version from package %s as it is not installed"), Pkg.FullName(true).c_str());
 735         return pkgCache::VerIterator(Cache, 0);
 736 }
 737                                                                         /*}}}*/
 738 // canNotFindInstCandVer                                                /*{{{*/
 739 pkgCache::VerIterator CacheSetHelper::canNotGetInstCandVer(pkgCacheFile &Cache,
 740                 pkgCache::PkgIterator const &Pkg) {
 741         if (ShowError == true)
 742                 _error->Insert(ErrorType, _("Can't select installed nor candidate version from package '%s' as it has neither of them"), Pkg.FullName(true).c_str());
 743         return pkgCache::VerIterator(Cache, 0);
 744 }
 745                                                                         /*}}}*/
 746 // canNotFindInstCandVer                                                /*{{{*/
 747 pkgCache::VerIterator CacheSetHelper::canNotGetCandInstVer(pkgCacheFile &Cache,
 748                 pkgCache::PkgIterator const &Pkg) {
 749         if (ShowError == true)
 750                 _error->Insert(ErrorType, _("Can't select installed nor candidate version from package '%s' as it has neither of them"), Pkg.FullName(true).c_str());
 751         return pkgCache::VerIterator(Cache, 0);
 752 }
 753                                                                         /*}}}*/
 754                                                                         /*}}}*/
 755 // showPackageSelection - by selector and given pattern                 /*{{{*/
 756 void CacheSetHelper::showPackageSelection(pkgCache::PkgIterator const &pkg, enum PkgSelector const select,
 757                                        std::string const &pattern) {
 758         switch (select) {
 759 APT_IGNORE_DEPRECATED_PUSH
 760         case REGEX: showRegExSelection(pkg, pattern); break;
 761         case TASK: showTaskSelection(pkg, pattern); break;
 762         case FNMATCH: showFnmatchSelection(pkg, pattern); break;
 763 APT_IGNORE_DEPRECATED_POP
 764         case PACKAGENAME: /* no suprises here */ break;
 765         case STRING: /* handled by the special cases */ break;
 766         case UNKNOWN: break;
 767         }
 768 }
 769 // showTaskSelection                                                    /*{{{*/
 770 APT_CONST void CacheSetHelper::showTaskSelection(pkgCache::PkgIterator const &/*pkg*/,
 771                                        std::string const &/*pattern*/) {
 772 }
 773                                                                         /*}}}*/
 774 // showRegExSelection                                                   /*{{{*/
 775 APT_CONST void CacheSetHelper::showRegExSelection(pkgCache::PkgIterator const &/*pkg*/,
 776                                         std::string const &/*pattern*/) {
 777 }
 778                                                                         /*}}}*/
 779 // showFnmatchSelection                                                 /*{{{*/
 780 APT_CONST void CacheSetHelper::showFnmatchSelection(pkgCache::PkgIterator const &/*pkg*/,
 781                                          std::string const &/*pattern*/) {
 782 }
 783                                                                         /*}}}*/
 784                                                                         /*}}}*/
 785 // showVersionSelection                                                 /*{{{*/
 786 void CacheSetHelper::showVersionSelection(pkgCache::PkgIterator const &Pkg,
 787       pkgCache::VerIterator const &Ver, enum VerSelector const select, std::string const &pattern) {
 788         switch (select) {
 789 APT_IGNORE_DEPRECATED_PUSH
 790         case RELEASE:
 791                 showSelectedVersion(Pkg, Ver, pattern, true);
 792                 break;
 793         case VERSIONNUMBER:
 794                 showSelectedVersion(Pkg, Ver, pattern, false);
 795                 break;
 796 APT_IGNORE_DEPRECATED_POP
 797         case NEWEST:
 798         case CANDIDATE:
 799         case INSTALLED:
 800         case CANDINST:
 801         case INSTCAND:
 802         case ALL:
 803         case CANDANDINST:
 804                 // not really suprises, but in fact: just not implemented
 805                 break;
 806         }
 807 }
 808 APT_CONST void CacheSetHelper::showSelectedVersion(pkgCache::PkgIterator const &/*Pkg*/,
 809                                          pkgCache::VerIterator const /*Ver*/,
 810                                          std::string const &/*ver*/,
 811                                          bool const /*verIsRel*/) {
 812 }
 813                                                                         /*}}}*/
 814
 815 CacheSetHelper::CacheSetHelper(bool const ShowError, GlobalError::MsgType ErrorType) :
 816    ShowError(ShowError), ErrorType(ErrorType), d(NULL) {}
 817 CacheSetHelper::~CacheSetHelper() {}
 818
 819 PackageContainerInterface::PackageContainerInterface() : ConstructedBy(CacheSetHelper::UNKNOWN), d(NULL) {}
 820 PackageContainerInterface::PackageContainerInterface(CacheSetHelper::PkgSelector const by) : ConstructedBy(by), d(NULL) {}
 821 PackageContainerInterface& PackageContainerInterface::operator=(PackageContainerInterface const &other) {
 822    if (this != &other)
 823       this->ConstructedBy = other.ConstructedBy;
 824    return *this;
 825 }
 826 PackageContainerInterface::~PackageContainerInterface() {}
 827
 828 PackageUniverse::PackageUniverse(pkgCache * const Owner) : _cont(Owner), d(NULL) { }
 829 PackageUniverse::~PackageUniverse() {}
 830
 831 VersionContainerInterface::VersionContainerInterface() : d(NULL) {}
 832 VersionContainerInterface& VersionContainerInterface::operator=(VersionContainerInterface const &) {
 833    return *this;
 834 }
 835
 836 VersionContainerInterface::~VersionContainerInterface() {}
 837 }