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/error.h>
  14 #include <apt-pkg/cacheset.h>
  15 #include <apt-pkg/strutl.h>
  16 #include <apt-pkg/versionmatch.h>
  17
  18 #include <apti18n.h>
  19
  20 #include <vector>
  21
  22 #include <regex.h>
  23                                                                         /*}}}*/
  24 namespace APT {
  25 // FromRegEx - Return all packages in the cache matching a pattern      /*{{{*/
  26 PackageSet PackageSet::FromRegEx(pkgCacheFile &Cache, std::string pattern, std::ostream &out) {
  27         PackageSet pkgset;
  28         std::string arch = "native";
  29         static const char * const isregex = ".?+*|[^$";
  30
  31         if (pattern.find_first_of(isregex) == std::string::npos)
  32                 return pkgset;
  33
  34         size_t archfound = pattern.find_last_of(':');
  35         if (archfound != std::string::npos) {
  36                 arch = pattern.substr(archfound+1);
  37                 if (arch.find_first_of(isregex) == std::string::npos)
  38                         pattern.erase(archfound);
  39                 else
  40                         arch = "native";
  41         }
  42
  43         regex_t Pattern;
  44         int Res;
  45         if ((Res = regcomp(&Pattern, pattern.c_str() , REG_EXTENDED | REG_ICASE | REG_NOSUB)) != 0) {
  46                 char Error[300];
  47                 regerror(Res, &Pattern, Error, sizeof(Error));
  48                 _error->Error(_("Regex compilation error - %s"), Error);
  49                 return pkgset;
  50         }
  51
  52         for (pkgCache::GrpIterator Grp = Cache.GetPkgCache()->GrpBegin(); Grp.end() == false; ++Grp)
  53         {
  54                 if (regexec(&Pattern, Grp.Name(), 0, 0, 0) != 0)
  55                         continue;
  56                 pkgCache::PkgIterator Pkg = Grp.FindPkg(arch);
  57                 if (Pkg.end() == true) {
  58                         if (archfound == std::string::npos) {
  59                                 std::vector<std::string> archs = APT::Configuration::getArchitectures();
  60                                 for (std::vector<std::string>::const_iterator a = archs.begin();
  61                                      a != archs.end() && Pkg.end() != true; ++a)
  62                                         Pkg = Grp.FindPkg(*a);
  63                         }
  64                         if (Pkg.end() == true)
  65                                 continue;
  66                 }
  67
  68                 ioprintf(out, _("Note, selecting %s for regex '%s'\n"),
  69                          Pkg.FullName(true).c_str(), pattern.c_str());
  70
  71                 pkgset.insert(Pkg);
  72         }
  73
  74         regfree(&Pattern);
  75
  76         return pkgset;
  77 }
  78                                                                         /*}}}*/
  79 // GroupedFromCommandLine - Return all versions specified on commandline/*{{{*/
  80 std::map<unsigned short, PackageSet> PackageSet::GroupedFromCommandLine(
  81                 pkgCacheFile &Cache, const char **cmdline,
  82                 std::list<PackageSet::Modifier> const &mods,
  83                 unsigned short const &fallback, std::ostream &out) {
  84         std::map<unsigned short, PackageSet> pkgsets;
  85         for (const char **I = cmdline; *I != 0; ++I) {
  86                 unsigned short modID = fallback;
  87                 std::string str = *I;
  88                 for (std::list<PackageSet::Modifier>::const_iterator mod = mods.begin();
  89                      mod != mods.end(); ++mod) {
  90                         size_t const alength = strlen(mod->Alias);
  91                         switch(mod->Pos) {
  92                         case PackageSet::Modifier::POSTFIX:
  93                                 if (str.compare(str.length() - alength, alength,
  94                                     mod->Alias, 0, alength) != 0)
  95                                         continue;
  96                                 str.erase(str.length() - alength);
  97                                 modID = mod->ID;
  98                                 break;
  99                         case PackageSet::Modifier::PREFIX:
 100                                 continue;
 101                         case PackageSet::Modifier::NONE:
 102                                 continue;
 103                         }
 104                         break;
 105                 }
 106                 PackageSet pset = PackageSet::FromString(Cache, str, out);
 107                 pkgsets[modID].insert(pset.begin(), pset.end());
 108         }
 109         return pkgsets;
 110 }
 111                                                                         /*}}}*/
 112 // FromCommandLine - Return all packages specified on commandline       /*{{{*/
 113 PackageSet PackageSet::FromCommandLine(pkgCacheFile &Cache, const char **cmdline, std::ostream &out) {
 114         PackageSet pkgset;
 115         for (const char **I = cmdline; *I != 0; ++I) {
 116                 PackageSet pset = FromString(Cache, *I, out);
 117                 pkgset.insert(pset.begin(), pset.end());
 118         }
 119         return pkgset;
 120 }
 121                                                                         /*}}}*/
 122 // FromString - Return all packages matching a specific string          /*{{{*/
 123 PackageSet PackageSet::FromString(pkgCacheFile &Cache, std::string const &str, std::ostream &out) {
 124         std::string pkg = str;
 125         size_t archfound = pkg.find_last_of(':');
 126         std::string arch;
 127         if (archfound != std::string::npos) {
 128                 arch = pkg.substr(archfound+1);
 129                 pkg.erase(archfound);
 130         }
 131
 132         pkgCache::PkgIterator Pkg;
 133         if (arch.empty() == true) {
 134                 pkgCache::GrpIterator Grp = Cache.GetPkgCache()->FindGrp(pkg);
 135                 if (Grp.end() == false)
 136                         Pkg = Grp.FindPreferredPkg();
 137         } else
 138                 Pkg = Cache.GetPkgCache()->FindPkg(pkg, arch);
 139
 140         if (Pkg.end() == false) {
 141                 PackageSet pkgset;
 142                 pkgset.insert(Pkg);
 143                 return pkgset;
 144         }
 145         PackageSet regex = FromRegEx(Cache, str, out);
 146         if (regex.empty() == true)
 147                 _error->Warning(_("Unable to locate package %s"), str.c_str());
 148         return regex;
 149 }
 150                                                                         /*}}}*/
 151 // FromCommandLine - Return all versions specified on commandline       /*{{{*/
 152 APT::VersionSet VersionSet::FromCommandLine(pkgCacheFile &Cache, const char **cmdline,
 153                 APT::VersionSet::Version const &fallback, std::ostream &out) {
 154         VersionSet verset;
 155         for (const char **I = cmdline; *I != 0; ++I) {
 156                 std::string pkg = *I;
 157                 std::string ver;
 158                 bool verIsRel = false;
 159                 size_t const vertag = pkg.find_last_of("/=");
 160                 if (vertag != string::npos) {
 161                         ver = pkg.substr(vertag+1);
 162                         verIsRel = (pkg[vertag] == '/');
 163                         pkg.erase(vertag);
 164                 }
 165                 PackageSet pkgset = PackageSet::FromString(Cache, pkg.c_str(), out);
 166                 for (PackageSet::const_iterator P = pkgset.begin();
 167                      P != pkgset.end(); ++P) {
 168                         if (vertag == string::npos) {
 169                                 AddSelectedVersion(Cache, verset, P, fallback);
 170                                 continue;
 171                         }
 172                         pkgCache::VerIterator V;
 173                         if (ver == "installed")
 174                                 V = getInstalledVer(Cache, P);
 175                         else if (ver == "candidate")
 176                                 V = getCandidateVer(Cache, P);
 177                         else {
 178                                 pkgVersionMatch Match(ver, (verIsRel == true ? pkgVersionMatch::Release :
 179                                                 pkgVersionMatch::Version));
 180                                 V = Match.Find(P);
 181                                 if (V.end() == true) {
 182                                         if (verIsRel == true)
 183                                                 _error->Error(_("Release '%s' for '%s' was not found"),
 184                                                                 ver.c_str(), P.FullName(true).c_str());
 185                                         else
 186                                                 _error->Error(_("Version '%s' for '%s' was not found"),
 187                                                                 ver.c_str(), P.FullName(true).c_str());
 188                                         continue;
 189                                 }
 190                         }
 191                         if (V.end() == true)
 192                                 continue;
 193                         if (ver == V.VerStr())
 194                                 ioprintf(out, _("Selected version '%s' (%s) for '%s'\n"),
 195                                          V.VerStr(), V.RelStr().c_str(), P.FullName(true).c_str());
 196                         verset.insert(V);
 197                 }
 198         }
 199         return verset;
 200 }
 201                                                                         /*}}}*/
 202 // AddSelectedVersion - add version from package based on fallback      /*{{{*/
 203 bool VersionSet::AddSelectedVersion(pkgCacheFile &Cache, VersionSet &verset,
 204                 pkgCache::PkgIterator const &P, VersionSet::Version const &fallback,
 205                 bool const &AllowError) {
 206         pkgCache::VerIterator V;
 207         switch(fallback) {
 208         case VersionSet::ALL:
 209                 if (P->VersionList != 0)
 210                         for (V = P.VersionList(); V.end() != true; ++V)
 211                                 verset.insert(V);
 212                 else if (AllowError == false)
 213                         return _error->Error(_("Can't select versions from package '%s' as it purely virtual"), P.FullName(true).c_str());
 214                 else
 215                         return false;
 216                 break;
 217         case VersionSet::CANDANDINST:
 218                 verset.insert(getInstalledVer(Cache, P, AllowError));
 219                 verset.insert(getCandidateVer(Cache, P, AllowError));
 220                 break;
 221         case VersionSet::CANDIDATE:
 222                 verset.insert(getCandidateVer(Cache, P, AllowError));
 223                 break;
 224         case VersionSet::INSTALLED:
 225                 verset.insert(getInstalledVer(Cache, P, AllowError));
 226                 break;
 227         case VersionSet::CANDINST:
 228                 V = getCandidateVer(Cache, P, true);
 229                 if (V.end() == true)
 230                         V = getInstalledVer(Cache, P, true);
 231                 if (V.end() == false)
 232                         verset.insert(V);
 233                 else if (AllowError == false)
 234                         return _error->Error(_("Can't select installed nor candidate version from package '%s' as it has neither of them"), P.FullName(true).c_str());
 235                 else
 236                         return false;
 237                 break;
 238         case VersionSet::INSTCAND:
 239                 V = getInstalledVer(Cache, P, true);
 240                 if (V.end() == true)
 241                         V = getCandidateVer(Cache, P, true);
 242                 if (V.end() == false)
 243                         verset.insert(V);
 244                 else if (AllowError == false)
 245                         return _error->Error(_("Can't select installed nor candidate version from package '%s' as it has neither of them"), P.FullName(true).c_str());
 246                 else
 247                         return false;
 248                 break;
 249         case VersionSet::NEWEST:
 250                 if (P->VersionList != 0)
 251                         verset.insert(P.VersionList());
 252                 else if (AllowError == false)
 253                         return _error->Error(_("Can't select newest version from package '%s' as it is purely virtual"), P.FullName(true).c_str());
 254                 else
 255                         return false;
 256                 break;
 257         }
 258         return true;
 259 }
 260                                                                         /*}}}*/
 261 // getCandidateVer - Returns the candidate version of the given package /*{{{*/
 262 pkgCache::VerIterator VersionSet::getCandidateVer(pkgCacheFile &Cache,
 263                 pkgCache::PkgIterator const &Pkg, bool const &AllowError) {
 264         if (unlikely(Cache.BuildDepCache() == false))
 265                 return pkgCache::VerIterator(*Cache);
 266         pkgCache::VerIterator Cand = Cache[Pkg].CandidateVerIter(Cache);
 267         if (AllowError == false && Cand.end() == true)
 268                 _error->Error(_("Can't select candidate version from package %s as it has no candidate"), Pkg.FullName(true).c_str());
 269         return Cand;
 270 }
 271                                                                         /*}}}*/
 272 // getInstalledVer - Returns the installed version of the given package /*{{{*/
 273 pkgCache::VerIterator VersionSet::getInstalledVer(pkgCacheFile &Cache,
 274                 pkgCache::PkgIterator const &Pkg, bool const &AllowError) {
 275         if (AllowError == false && Pkg->CurrentVer == 0)
 276                 _error->Error(_("Can't select installed version from package %s as it is not installed"), Pkg.FullName(true).c_str());
 277         return Pkg.CurrentVer();
 278 }
 279                                                                         /*}}}*/
 280 }