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