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 // FromCommandLine - Return all packages specified on commandline       /*{{{*/
  80 PackageSet PackageSet::FromCommandLine(pkgCacheFile &Cache, const char **cmdline, std::ostream &out) {
  81         PackageSet pkgset;
  82         for (const char **I = cmdline; *I != 0; ++I) {
  83                 PackageSet pset = FromString(Cache, *I, out);
  84                 pkgset.insert(pset.begin(), pset.end());
  85         }
  86         return pkgset;
  87 }
  88                                                                         /*}}}*/
  89 // FromString - Return all packages matching a specific string          /*{{{*/
  90 PackageSet PackageSet::FromString(pkgCacheFile &Cache, const char * const str, std::ostream &out) {
  91         pkgCache::GrpIterator Grp = Cache.GetPkgCache()->FindGrp(str);
  92         if (Grp.end() == false) {
  93                 pkgCache::PkgIterator Pkg = Grp.FindPreferredPkg();
  94                 PackageSet pkgset;
  95                 pkgset.insert(Pkg);
  96                 return pkgset;
  97         }
  98         PackageSet regex = FromRegEx(Cache, str, out);
  99         if (regex.empty() == true)
 100                 _error->Warning(_("Unable to locate package %s"), str);
 101         return regex;
 102 }
 103                                                                         /*}}}*/
 104 // FromCommandLine - Return all versions specified on commandline       /*{{{*/
 105 APT::VersionSet VersionSet::FromCommandLine(pkgCacheFile &Cache, const char **cmdline,
 106                 APT::VersionSet::Version const &fallback, std::ostream &out) {
 107         VersionSet verset;
 108         for (const char **I = cmdline; *I != 0; ++I) {
 109                 std::string pkg = *I;
 110                 std::string ver;
 111                 bool verIsRel = false;
 112                 size_t const vertag = pkg.find_last_of("/=");
 113                 if (vertag != string::npos) {
 114                         ver = pkg.substr(vertag+1);
 115                         verIsRel = (pkg[vertag] == '/');
 116                         pkg.erase(vertag);
 117                 }
 118                 PackageSet pkgset = PackageSet::FromString(Cache, pkg.c_str(), out);
 119                 for (PackageSet::const_iterator P = pkgset.begin();
 120                      P != pkgset.end(); ++P) {
 121                         if (vertag != string::npos) {
 122                                 pkgVersionMatch Match(ver, (verIsRel == true ? pkgVersionMatch::Release :
 123                                                         pkgVersionMatch::Version));
 124                                 pkgCache::VerIterator V = Match.Find(P);
 125                                 if (V.end() == true) {
 126                                         if (verIsRel == true)
 127                                                 _error->Error(_("Release '%s' for '%s' was not found"),
 128                                                                 ver.c_str(), P.FullName(true).c_str());
 129                                         else
 130                                                 _error->Error(_("Version '%s' for '%s' was not found"),
 131                                                                 ver.c_str(), P.FullName(true).c_str());
 132                                         continue;
 133                                 }
 134                                 if (strcmp(ver.c_str(), V.VerStr()) != 0)
 135                                         ioprintf(out, _("Selected version %s (%s) for %s\n"),
 136                                                  V.VerStr(), V.RelStr().c_str(), P.FullName(true).c_str());
 137                                 verset.insert(V);
 138                         } else {
 139                                 pkgCache::VerIterator V;
 140                                 switch(fallback) {
 141                                 case VersionSet::ALL:
 142                                         for (V = P.VersionList(); V.end() != true; ++V)
 143                                                 verset.insert(V);
 144                                         break;
 145                                 case VersionSet::CANDANDINST:
 146                                         verset.insert(getInstalledVer(Cache, P));
 147                                         verset.insert(getCandidateVer(Cache, P));
 148                                         break;
 149                                 case VersionSet::CANDIDATE:
 150                                         verset.insert(getCandidateVer(Cache, P));
 151                                         break;
 152                                 case VersionSet::INSTALLED:
 153                                         verset.insert(getInstalledVer(Cache, P));
 154                                         break;
 155                                 case VersionSet::CANDINST:
 156                                         V = getCandidateVer(Cache, P, true);
 157                                         if (V.end() == true)
 158                                                 V = getInstalledVer(Cache, P, true);
 159                                         if (V.end() == false)
 160                                                 verset.insert(V);
 161                                         else
 162                                                 _error->Error(_("Can't select installed nor candidate version from package %s as it has neither of them"), P.FullName(true).c_str());
 163                                         break;
 164                                 case VersionSet::INSTCAND:
 165                                         V = getInstalledVer(Cache, P, true);
 166                                         if (V.end() == true)
 167                                                 V = getCandidateVer(Cache, P, true);
 168                                         if (V.end() == false)
 169                                                 verset.insert(V);
 170                                         else
 171                                                 _error->Error(_("Can't select installed nor candidate version from package %s as it has neither of them"), P.FullName(true).c_str());
 172                                         break;
 173                                 case VersionSet::NEWEST:
 174                                         if (P->VersionList != 0)
 175                                                 verset.insert(P.VersionList());
 176                                         else
 177                                                 _error->Error(_("Can't select newest version from package %s as it is purely virtual"), P.FullName(true).c_str());
 178                                         break;
 179                                 }
 180                         }
 181                 }
 182         }
 183         return verset;
 184 }
 185                                                                         /*}}}*/
 186 // getCandidateVer - Returns the candidate version of the given package /*{{{*/
 187 pkgCache::VerIterator VersionSet::getCandidateVer(pkgCacheFile &Cache,
 188                 pkgCache::PkgIterator const &Pkg, bool const &AllowError) {
 189         if (unlikely(Cache.BuildDepCache() == false))
 190                 return pkgCache::VerIterator(*Cache);
 191         pkgCache::VerIterator Cand = Cache[Pkg].InstVerIter(Cache);
 192         if (AllowError == false && Cand.end() == true)
 193                 _error->Error(_("Can't select candidate version from package %s as it has no candidate"), Pkg.FullName(true).c_str());
 194         return Cand;
 195 }
 196                                                                         /*}}}*/
 197 // getInstalledVer - Returns the installed version of the given package /*{{{*/
 198 pkgCache::VerIterator VersionSet::getInstalledVer(pkgCacheFile &Cache,
 199                 pkgCache::PkgIterator const &Pkg, bool const &AllowError) {
 200         if (AllowError == false && Pkg->CurrentVer == 0)
 201                 _error->Error(_("Can't select installed version from package %s as it is not installed"), Pkg.FullName(true).c_str());
 202         return Pkg.CurrentVer();
 203 }
 204                                                                         /*}}}*/
 205 }