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 <apt-pkg/aptconfiguration.h>
  13 #include <apt-pkg/cachefilter.h>
  14 #include <apt-pkg/cacheset.h>
  15 #include <apt-pkg/error.h>
  16 #include <apt-pkg/strutl.h>
  17 #include <apt-pkg/versionmatch.h>
  18
  19 #include <apti18n.h>
  20
  21 #include <vector>
  22
  23 #include <regex.h>
  24                                                                         /*}}}*/
  25 namespace APT {
  26 // FromTask - Return all packages in the cache from a specific task     /*{{{*/
  27 PackageSet PackageSet::FromTask(pkgCacheFile &Cache, std::string pattern, CacheSetHelper &helper) {
  28         size_t const archfound = pattern.find_last_of(':');
  29         std::string arch = "native";
  30         if (archfound != std::string::npos) {
  31                 arch = pattern.substr(archfound+1);
  32                 pattern.erase(archfound);
  33         }
  34
  35         if (pattern[pattern.length() -1] != '^')
  36                 return APT::PackageSet(TASK);
  37         pattern.erase(pattern.length()-1);
  38
  39         if (unlikely(Cache.GetPkgCache() == 0 || Cache.GetDepCache() == 0))
  40                 return APT::PackageSet(TASK);
  41
  42         PackageSet pkgset(TASK);
  43         // get the records
  44         pkgRecords Recs(Cache);
  45
  46         // build regexp for the task
  47         regex_t Pattern;
  48         char S[300];
  49         snprintf(S, sizeof(S), "^Task:.*[, ]%s([, ]|$)", pattern.c_str());
  50         if(regcomp(&Pattern,S, REG_EXTENDED | REG_NOSUB | REG_NEWLINE) != 0) {
  51                 _error->Error("Failed to compile task regexp");
  52                 return pkgset;
  53         }
  54
  55         for (pkgCache::GrpIterator Grp = Cache->GrpBegin(); Grp.end() == false; ++Grp) {
  56                 pkgCache::PkgIterator Pkg = Grp.FindPkg(arch);
  57                 if (Pkg.end() == true)
  58                         continue;
  59                 pkgCache::VerIterator ver = Cache[Pkg].CandidateVerIter(Cache);
  60                 if(ver.end() == true)
  61                         continue;
  62
  63                 pkgRecords::Parser &parser = Recs.Lookup(ver.FileList());
  64                 const char *start, *end;
  65                 parser.GetRec(start,end);
  66                 unsigned int const length = end - start;
  67                 char buf[length];
  68                 strncpy(buf, start, length);
  69                 buf[length-1] = '\0';
  70                 if (regexec(&Pattern, buf, 0, 0, 0) != 0)
  71                         continue;
  72
  73                 pkgset.insert(Pkg);
  74         }
  75         regfree(&Pattern);
  76
  77         if (pkgset.empty() == true)
  78                 return helper.canNotFindTask(Cache, pattern);
  79
  80         helper.showTaskSelection(pkgset, pattern);
  81         return pkgset;
  82 }
  83                                                                         /*}}}*/
  84 // FromRegEx - Return all packages in the cache matching a pattern      /*{{{*/
  85 PackageSet PackageSet::FromRegEx(pkgCacheFile &Cache, std::string pattern, CacheSetHelper &helper) {
  86         static const char * const isregex = ".?+*|[^$";
  87         if (pattern.find_first_of(isregex) == std::string::npos)
  88                 return PackageSet(REGEX);
  89
  90         size_t archfound = pattern.find_last_of(':');
  91         std::string arch = "native";
  92         if (archfound != std::string::npos) {
  93                 arch = pattern.substr(archfound+1);
  94                 if (arch.find_first_of(isregex) == std::string::npos)
  95                         pattern.erase(archfound);
  96                 else
  97                         arch = "native";
  98         }
  99
 100         if (unlikely(Cache.GetPkgCache() == 0))
 101                 return PackageSet(REGEX);
 102
 103         APT::CacheFilter::PackageNameMatchesRegEx regexfilter(pattern);
 104
 105         PackageSet pkgset(REGEX);
 106         for (pkgCache::GrpIterator Grp = Cache.GetPkgCache()->GrpBegin(); Grp.end() == false; ++Grp) {
 107                 if (regexfilter(Grp) == false)
 108                         continue;
 109                 pkgCache::PkgIterator Pkg = Grp.FindPkg(arch);
 110                 if (Pkg.end() == true) {
 111                         if (archfound == std::string::npos) {
 112                                 std::vector<std::string> archs = APT::Configuration::getArchitectures();
 113                                 for (std::vector<std::string>::const_iterator a = archs.begin();
 114                                      a != archs.end() && Pkg.end() != true; ++a)
 115                                         Pkg = Grp.FindPkg(*a);
 116                         }
 117                         if (Pkg.end() == true)
 118                                 continue;
 119                 }
 120
 121                 pkgset.insert(Pkg);
 122         }
 123
 124         if (pkgset.empty() == true)
 125                 return helper.canNotFindRegEx(Cache, pattern);
 126
 127         helper.showRegExSelection(pkgset, pattern);
 128         return pkgset;
 129 }
 130                                                                         /*}}}*/
 131 // FromName - Returns the package defined  by this string               /*{{{*/
 132 pkgCache::PkgIterator PackageSet::FromName(pkgCacheFile &Cache,
 133                         std::string const &str, CacheSetHelper &helper) {
 134         std::string pkg = str;
 135         size_t archfound = pkg.find_last_of(':');
 136         std::string arch;
 137         if (archfound != std::string::npos) {
 138                 arch = pkg.substr(archfound+1);
 139                 pkg.erase(archfound);
 140         }
 141
 142         if (Cache.GetPkgCache() == 0)
 143                 return pkgCache::PkgIterator(Cache, 0);
 144
 145         pkgCache::PkgIterator Pkg(Cache, 0);
 146         if (arch.empty() == true) {
 147                 pkgCache::GrpIterator Grp = Cache.GetPkgCache()->FindGrp(pkg);
 148                 if (Grp.end() == false)
 149                         Pkg = Grp.FindPreferredPkg();
 150         } else
 151                 Pkg = Cache.GetPkgCache()->FindPkg(pkg, arch);
 152
 153         if (Pkg.end() == true)
 154                 return helper.canNotFindPkgName(Cache, str);
 155         return Pkg;
 156 }
 157                                                                         /*}}}*/
 158 // GroupedFromCommandLine - Return all versions specified on commandline/*{{{*/
 159 std::map<unsigned short, PackageSet> PackageSet::GroupedFromCommandLine(
 160                 pkgCacheFile &Cache, const char **cmdline,
 161                 std::list<PackageSet::Modifier> const &mods,
 162                 unsigned short const &fallback, CacheSetHelper &helper) {
 163         std::map<unsigned short, PackageSet> pkgsets;
 164         for (const char **I = cmdline; *I != 0; ++I) {
 165                 unsigned short modID = fallback;
 166                 std::string str = *I;
 167                 bool modifierPresent = false;
 168                 for (std::list<PackageSet::Modifier>::const_iterator mod = mods.begin();
 169                      mod != mods.end(); ++mod) {
 170                         size_t const alength = strlen(mod->Alias);
 171                         switch(mod->Pos) {
 172                         case PackageSet::Modifier::POSTFIX:
 173                                 if (str.compare(str.length() - alength, alength,
 174                                                 mod->Alias, 0, alength) != 0)
 175                                         continue;
 176                                 str.erase(str.length() - alength);
 177                                 modID = mod->ID;
 178                                 break;
 179                         case PackageSet::Modifier::PREFIX:
 180                                 continue;
 181                         case PackageSet::Modifier::NONE:
 182                                 continue;
 183                         }
 184                         modifierPresent = true;
 185                         break;
 186                 }
 187                 if (modifierPresent == true) {
 188                         bool const errors = helper.showErrors(false);
 189                         pkgCache::PkgIterator Pkg = FromName(Cache, *I, helper);
 190                         helper.showErrors(errors);
 191                         if (Pkg.end() == false) {
 192                                 pkgsets[fallback].insert(Pkg);
 193                                 continue;
 194                         }
 195                 }
 196                 pkgsets[modID].insert(PackageSet::FromString(Cache, str, helper));
 197         }
 198         return pkgsets;
 199 }
 200                                                                         /*}}}*/
 201 // FromCommandLine - Return all packages specified on commandline       /*{{{*/
 202 PackageSet PackageSet::FromCommandLine(pkgCacheFile &Cache, const char **cmdline, CacheSetHelper &helper) {
 203         PackageSet pkgset;
 204         for (const char **I = cmdline; *I != 0; ++I) {
 205                 PackageSet pset = FromString(Cache, *I, helper);
 206                 pkgset.insert(pset.begin(), pset.end());
 207         }
 208         return pkgset;
 209 }
 210                                                                         /*}}}*/
 211 // FromString - Return all packages matching a specific string          /*{{{*/
 212 PackageSet PackageSet::FromString(pkgCacheFile &Cache, std::string const &str, CacheSetHelper &helper) {
 213         _error->PushToStack();
 214
 215         PackageSet pkgset;
 216         pkgCache::PkgIterator Pkg = FromName(Cache, str, helper);
 217         if (Pkg.end() == false)
 218                 pkgset.insert(Pkg);
 219         else {
 220                 pkgset = FromTask(Cache, str, helper);
 221                 if (pkgset.empty() == true) {
 222                         pkgset = FromRegEx(Cache, str, helper);
 223                         if (pkgset.empty() == true)
 224                                 pkgset = helper.canNotFindPackage(Cache, str);
 225                 }
 226         }
 227
 228         if (pkgset.empty() == false)
 229                 _error->RevertToStack();
 230         else
 231                 _error->MergeWithStack();
 232         return pkgset;
 233 }
 234                                                                         /*}}}*/
 235 // GroupedFromCommandLine - Return all versions specified on commandline/*{{{*/
 236 std::map<unsigned short, VersionSet> VersionSet::GroupedFromCommandLine(
 237                 pkgCacheFile &Cache, const char **cmdline,
 238                 std::list<VersionSet::Modifier> const &mods,
 239                 unsigned short const &fallback, CacheSetHelper &helper) {
 240         std::map<unsigned short, VersionSet> versets;
 241         for (const char **I = cmdline; *I != 0; ++I) {
 242                 unsigned short modID = fallback;
 243                 VersionSet::Version select = VersionSet::NEWEST;
 244                 std::string str = *I;
 245                 bool modifierPresent = false;
 246                 for (std::list<VersionSet::Modifier>::const_iterator mod = mods.begin();
 247                      mod != mods.end(); ++mod) {
 248                         if (modID == fallback && mod->ID == fallback)
 249                                 select = mod->SelectVersion;
 250                         size_t const alength = strlen(mod->Alias);
 251                         switch(mod->Pos) {
 252                         case VersionSet::Modifier::POSTFIX:
 253                                 if (str.compare(str.length() - alength, alength,
 254                                                 mod->Alias, 0, alength) != 0)
 255                                         continue;
 256                                 str.erase(str.length() - alength);
 257                                 modID = mod->ID;
 258                                 select = mod->SelectVersion;
 259                                 break;
 260                         case VersionSet::Modifier::PREFIX:
 261                                 continue;
 262                         case VersionSet::Modifier::NONE:
 263                                 continue;
 264                         }
 265                         modifierPresent = true;
 266                         break;
 267                 }
 268
 269                 if (modifierPresent == true) {
 270                         bool const errors = helper.showErrors(false);
 271                         VersionSet const vset = VersionSet::FromString(Cache, std::string(*I), select, helper, true);
 272                         helper.showErrors(errors);
 273                         if (vset.empty() == false) {
 274                                 versets[fallback].insert(vset);
 275                                 continue;
 276                         }
 277                 }
 278                 versets[modID].insert(VersionSet::FromString(Cache, str, select , helper));
 279         }
 280         return versets;
 281 }
 282                                                                         /*}}}*/
 283 // FromCommandLine - Return all versions specified on commandline       /*{{{*/
 284 APT::VersionSet VersionSet::FromCommandLine(pkgCacheFile &Cache, const char **cmdline,
 285                 APT::VersionSet::Version const &fallback, CacheSetHelper &helper) {
 286         VersionSet verset;
 287         for (const char **I = cmdline; *I != 0; ++I)
 288                 verset.insert(VersionSet::FromString(Cache, *I, fallback, helper));
 289         return verset;
 290 }
 291                                                                         /*}}}*/
 292 // FromString - Returns all versions spedcified by a string             /*{{{*/
 293 APT::VersionSet VersionSet::FromString(pkgCacheFile &Cache, std::string pkg,
 294                 APT::VersionSet::Version const &fallback, CacheSetHelper &helper,
 295                 bool const &onlyFromName) {
 296         std::string ver;
 297         bool verIsRel = false;
 298         size_t const vertag = pkg.find_last_of("/=");
 299         if (vertag != string::npos) {
 300                 ver = pkg.substr(vertag+1);
 301                 verIsRel = (pkg[vertag] == '/');
 302                 pkg.erase(vertag);
 303         }
 304         PackageSet pkgset;
 305         if (onlyFromName == false)
 306                 pkgset = PackageSet::FromString(Cache, pkg, helper);
 307         else {
 308                 pkgset.insert(PackageSet::FromName(Cache, pkg, helper));
 309         }
 310
 311         VersionSet verset;
 312         bool errors = true;
 313         if (pkgset.getConstructor() != PackageSet::UNKNOWN)
 314                 errors = helper.showErrors(false);
 315         for (PackageSet::const_iterator P = pkgset.begin();
 316              P != pkgset.end(); ++P) {
 317                 if (vertag == string::npos) {
 318                         verset.insert(VersionSet::FromPackage(Cache, P, fallback, helper));
 319                         continue;
 320                 }
 321                 pkgCache::VerIterator V;
 322                 if (ver == "installed")
 323                         V = getInstalledVer(Cache, P, helper);
 324                 else if (ver == "candidate")
 325                         V = getCandidateVer(Cache, P, helper);
 326                 else {
 327                         pkgVersionMatch Match(ver, (verIsRel == true ? pkgVersionMatch::Release :
 328                                         pkgVersionMatch::Version));
 329                         V = Match.Find(P);
 330                         if (V.end() == true) {
 331                                 if (verIsRel == true)
 332                                         _error->Error(_("Release '%s' for '%s' was not found"),
 333                                                         ver.c_str(), P.FullName(true).c_str());
 334                                 else
 335                                         _error->Error(_("Version '%s' for '%s' was not found"),
 336                                                         ver.c_str(), P.FullName(true).c_str());
 337                                 continue;
 338                         }
 339                 }
 340                 if (V.end() == true)
 341                         continue;
 342                 helper.showSelectedVersion(P, V, ver, verIsRel);
 343                 verset.insert(V);
 344         }
 345         if (pkgset.getConstructor() != PackageSet::UNKNOWN)
 346                 helper.showErrors(errors);
 347         return verset;
 348 }
 349                                                                         /*}}}*/
 350 // FromPackage - versions from package based on fallback                /*{{{*/
 351 VersionSet VersionSet::FromPackage(pkgCacheFile &Cache, pkgCache::PkgIterator const &P,
 352                 VersionSet::Version const &fallback, CacheSetHelper &helper) {
 353         VersionSet verset;
 354         pkgCache::VerIterator V;
 355         bool showErrors;
 356         switch(fallback) {
 357         case VersionSet::ALL:
 358                 if (P->VersionList != 0)
 359                         for (V = P.VersionList(); V.end() != true; ++V)
 360                                 verset.insert(V);
 361                 else
 362                         verset.insert(helper.canNotFindAllVer(Cache, P));
 363                 break;
 364         case VersionSet::CANDANDINST:
 365                 verset.insert(getInstalledVer(Cache, P, helper));
 366                 verset.insert(getCandidateVer(Cache, P, helper));
 367                 break;
 368         case VersionSet::CANDIDATE:
 369                 verset.insert(getCandidateVer(Cache, P, helper));
 370                 break;
 371         case VersionSet::INSTALLED:
 372                 verset.insert(getInstalledVer(Cache, P, helper));
 373                 break;
 374         case VersionSet::CANDINST:
 375                 showErrors = helper.showErrors(false);
 376                 V = getCandidateVer(Cache, P, helper);
 377                 if (V.end() == true)
 378                         V = getInstalledVer(Cache, P, helper);
 379                 helper.showErrors(showErrors);
 380                 if (V.end() == false)
 381                         verset.insert(V);
 382                 else
 383                         verset.insert(helper.canNotFindInstCandVer(Cache, P));
 384                 break;
 385         case VersionSet::INSTCAND:
 386                 showErrors = helper.showErrors(false);
 387                 V = getInstalledVer(Cache, P, helper);
 388                 if (V.end() == true)
 389                         V = getCandidateVer(Cache, P, helper);
 390                 helper.showErrors(showErrors);
 391                 if (V.end() == false)
 392                         verset.insert(V);
 393                 else
 394                         verset.insert(helper.canNotFindInstCandVer(Cache, P));
 395                 break;
 396         case VersionSet::NEWEST:
 397                 if (P->VersionList != 0)
 398                         verset.insert(P.VersionList());
 399                 else
 400                         verset.insert(helper.canNotFindNewestVer(Cache, P));
 401                 break;
 402         }
 403         return verset;
 404 }
 405                                                                         /*}}}*/
 406 // getCandidateVer - Returns the candidate version of the given package /*{{{*/
 407 pkgCache::VerIterator VersionSet::getCandidateVer(pkgCacheFile &Cache,
 408                 pkgCache::PkgIterator const &Pkg, CacheSetHelper &helper) {
 409         pkgCache::VerIterator Cand;
 410         if (Cache.IsPolicyBuilt() == true || Cache.IsDepCacheBuilt() == false)
 411         {
 412                 if (unlikely(Cache.GetPolicy() == 0))
 413                         return pkgCache::VerIterator(Cache);
 414                 Cand = Cache.GetPolicy()->GetCandidateVer(Pkg);
 415         } else {
 416                 Cand = Cache[Pkg].CandidateVerIter(Cache);
 417         }
 418         if (Cand.end() == true)
 419                 return helper.canNotFindCandidateVer(Cache, Pkg);
 420         return Cand;
 421 }
 422                                                                         /*}}}*/
 423 // getInstalledVer - Returns the installed version of the given package /*{{{*/
 424 pkgCache::VerIterator VersionSet::getInstalledVer(pkgCacheFile &Cache,
 425                 pkgCache::PkgIterator const &Pkg, CacheSetHelper &helper) {
 426         if (Pkg->CurrentVer == 0)
 427                 return helper.canNotFindInstalledVer(Cache, Pkg);
 428         return Pkg.CurrentVer();
 429 }
 430                                                                         /*}}}*/
 431 // canNotFindPkgName - handle the case no package has this name         /*{{{*/
 432 pkgCache::PkgIterator CacheSetHelper::canNotFindPkgName(pkgCacheFile &Cache,
 433                         std::string const &str) {
 434         if (ShowError == true)
 435                 _error->Error(_("Unable to locate package %s"), str.c_str());
 436         return pkgCache::PkgIterator(Cache, 0);
 437 }
 438                                                                         /*}}}*/
 439 // canNotFindTask - handle the case no package is found for a task      /*{{{*/
 440 PackageSet CacheSetHelper::canNotFindTask(pkgCacheFile &Cache, std::string pattern) {
 441         if (ShowError == true)
 442                 _error->Error(_("Couldn't find task '%s'"), pattern.c_str());
 443         return PackageSet();
 444 }
 445                                                                         /*}}}*/
 446 // canNotFindRegEx - handle the case no package is found by a regex     /*{{{*/
 447 PackageSet CacheSetHelper::canNotFindRegEx(pkgCacheFile &Cache, std::string pattern) {
 448         if (ShowError == true)
 449                 _error->Error(_("Couldn't find any package by regex '%s'"), pattern.c_str());
 450         return PackageSet();
 451 }
 452                                                                         /*}}}*/
 453 // canNotFindPackage - handle the case no package is found from a string/*{{{*/
 454 PackageSet CacheSetHelper::canNotFindPackage(pkgCacheFile &Cache, std::string const &str) {
 455         return PackageSet();
 456 }
 457                                                                         /*}}}*/
 458 // canNotFindAllVer                                                     /*{{{*/
 459 VersionSet CacheSetHelper::canNotFindAllVer(pkgCacheFile &Cache,
 460                 pkgCache::PkgIterator const &Pkg) {
 461         if (ShowError == true)
 462                 _error->Error(_("Can't select versions from package '%s' as it purely virtual"), Pkg.FullName(true).c_str());
 463         return VersionSet();
 464 }
 465                                                                         /*}}}*/
 466 // canNotFindInstCandVer                                                /*{{{*/
 467 VersionSet CacheSetHelper::canNotFindInstCandVer(pkgCacheFile &Cache,
 468                 pkgCache::PkgIterator const &Pkg) {
 469         if (ShowError == true)
 470                 _error->Error(_("Can't select installed nor candidate version from package '%s' as it has neither of them"), Pkg.FullName(true).c_str());
 471         return VersionSet();
 472 }
 473                                                                         /*}}}*/
 474 // canNotFindInstCandVer                                                /*{{{*/
 475 VersionSet CacheSetHelper::canNotFindCandInstVer(pkgCacheFile &Cache,
 476                 pkgCache::PkgIterator const &Pkg) {
 477         if (ShowError == true)
 478                 _error->Error(_("Can't select installed nor candidate version from package '%s' as it has neither of them"), Pkg.FullName(true).c_str());
 479         return VersionSet();
 480 }
 481                                                                         /*}}}*/
 482 // canNotFindNewestVer                                                  /*{{{*/
 483 pkgCache::VerIterator CacheSetHelper::canNotFindNewestVer(pkgCacheFile &Cache,
 484                 pkgCache::PkgIterator const &Pkg) {
 485         if (ShowError == true)
 486                 _error->Error(_("Can't select newest version from package '%s' as it is purely virtual"), Pkg.FullName(true).c_str());
 487         return pkgCache::VerIterator(Cache, 0);
 488 }
 489                                                                         /*}}}*/
 490 // canNotFindCandidateVer                                               /*{{{*/
 491 pkgCache::VerIterator CacheSetHelper::canNotFindCandidateVer(pkgCacheFile &Cache,
 492                 pkgCache::PkgIterator const &Pkg) {
 493         if (ShowError == true)
 494                 _error->Error(_("Can't select candidate version from package %s as it has no candidate"), Pkg.FullName(true).c_str());
 495         return pkgCache::VerIterator(Cache, 0);
 496 }
 497                                                                         /*}}}*/
 498 // canNotFindInstalledVer                                               /*{{{*/
 499 pkgCache::VerIterator CacheSetHelper::canNotFindInstalledVer(pkgCacheFile &Cache,
 500                 pkgCache::PkgIterator const &Pkg) {
 501         if (ShowError == true)
 502                 _error->Error(_("Can't select installed version from package %s as it is not installed"), Pkg.FullName(true).c_str());
 503         return pkgCache::VerIterator(Cache, 0);
 504 }
 505                                                                         /*}}}*/
 506 }