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-rw-r--r--apt-pkg/cacheset.cc280
1 files changed, 280 insertions, 0 deletions
diff --git a/apt-pkg/cacheset.cc b/apt-pkg/cacheset.cc
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+// -*- mode: cpp; mode: fold -*-
+// Description /*{{{*/
+/* ######################################################################
+
+ Simple wrapper around a std::set to provide a similar interface to
+ a set of cache structures as to the complete set of all structures
+ in the pkgCache. Currently only Package is supported.
+
+ ##################################################################### */
+ /*}}}*/
+// Include Files /*{{{*/
+#include <apt-pkg/aptconfiguration.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/cacheset.h>
+#include <apt-pkg/strutl.h>
+#include <apt-pkg/versionmatch.h>
+
+#include <apti18n.h>
+
+#include <vector>
+
+#include <regex.h>
+ /*}}}*/
+namespace APT {
+// FromRegEx - Return all packages in the cache matching a pattern /*{{{*/
+PackageSet PackageSet::FromRegEx(pkgCacheFile &Cache, std::string pattern, std::ostream &out) {
+ PackageSet pkgset;
+ std::string arch = "native";
+ static const char * const isregex = ".?+*|[^$";
+
+ if (pattern.find_first_of(isregex) == std::string::npos)
+ return pkgset;
+
+ size_t archfound = pattern.find_last_of(':');
+ if (archfound != std::string::npos) {
+ arch = pattern.substr(archfound+1);
+ if (arch.find_first_of(isregex) == std::string::npos)
+ pattern.erase(archfound);
+ else
+ arch = "native";
+ }
+
+ regex_t Pattern;
+ int Res;
+ if ((Res = regcomp(&Pattern, pattern.c_str() , REG_EXTENDED | REG_ICASE | REG_NOSUB)) != 0) {
+ char Error[300];
+ regerror(Res, &Pattern, Error, sizeof(Error));
+ _error->Error(_("Regex compilation error - %s"), Error);
+ return pkgset;
+ }
+
+ for (pkgCache::GrpIterator Grp = Cache.GetPkgCache()->GrpBegin(); Grp.end() == false; ++Grp)
+ {
+ if (regexec(&Pattern, Grp.Name(), 0, 0, 0) != 0)
+ continue;
+ pkgCache::PkgIterator Pkg = Grp.FindPkg(arch);
+ if (Pkg.end() == true) {
+ if (archfound == std::string::npos) {
+ std::vector<std::string> archs = APT::Configuration::getArchitectures();
+ for (std::vector<std::string>::const_iterator a = archs.begin();
+ a != archs.end() && Pkg.end() != true; ++a)
+ Pkg = Grp.FindPkg(*a);
+ }
+ if (Pkg.end() == true)
+ continue;
+ }
+
+ ioprintf(out, _("Note, selecting %s for regex '%s'\n"),
+ Pkg.FullName(true).c_str(), pattern.c_str());
+
+ pkgset.insert(Pkg);
+ }
+
+ regfree(&Pattern);
+
+ return pkgset;
+}
+ /*}}}*/
+// GroupedFromCommandLine - Return all versions specified on commandline/*{{{*/
+std::map<unsigned short, PackageSet> PackageSet::GroupedFromCommandLine(
+ pkgCacheFile &Cache, const char **cmdline,
+ std::list<PackageSet::Modifier> const &mods,
+ unsigned short const &fallback, std::ostream &out) {
+ std::map<unsigned short, PackageSet> pkgsets;
+ for (const char **I = cmdline; *I != 0; ++I) {
+ unsigned short modID = fallback;
+ std::string str = *I;
+ for (std::list<PackageSet::Modifier>::const_iterator mod = mods.begin();
+ mod != mods.end(); ++mod) {
+ size_t const alength = strlen(mod->Alias);
+ switch(mod->Pos) {
+ case PackageSet::Modifier::POSTFIX:
+ if (str.compare(str.length() - alength, alength,
+ mod->Alias, 0, alength) != 0)
+ continue;
+ str.erase(str.length() - alength);
+ modID = mod->ID;
+ break;
+ case PackageSet::Modifier::PREFIX:
+ continue;
+ case PackageSet::Modifier::NONE:
+ continue;
+ }
+ break;
+ }
+ PackageSet pset = PackageSet::FromString(Cache, str, out);
+ pkgsets[modID].insert(pset.begin(), pset.end());
+ }
+ return pkgsets;
+}
+ /*}}}*/
+// FromCommandLine - Return all packages specified on commandline /*{{{*/
+PackageSet PackageSet::FromCommandLine(pkgCacheFile &Cache, const char **cmdline, std::ostream &out) {
+ PackageSet pkgset;
+ for (const char **I = cmdline; *I != 0; ++I) {
+ PackageSet pset = FromString(Cache, *I, out);
+ pkgset.insert(pset.begin(), pset.end());
+ }
+ return pkgset;
+}
+ /*}}}*/
+// FromString - Return all packages matching a specific string /*{{{*/
+PackageSet PackageSet::FromString(pkgCacheFile &Cache, std::string const &str, std::ostream &out) {
+ std::string pkg = str;
+ size_t archfound = pkg.find_last_of(':');
+ std::string arch;
+ if (archfound != std::string::npos) {
+ arch = pkg.substr(archfound+1);
+ pkg.erase(archfound);
+ }
+
+ pkgCache::PkgIterator Pkg;
+ if (arch.empty() == true) {
+ pkgCache::GrpIterator Grp = Cache.GetPkgCache()->FindGrp(pkg);
+ if (Grp.end() == false)
+ Pkg = Grp.FindPreferredPkg();
+ } else
+ Pkg = Cache.GetPkgCache()->FindPkg(pkg, arch);
+
+ if (Pkg.end() == false) {
+ PackageSet pkgset;
+ pkgset.insert(Pkg);
+ return pkgset;
+ }
+ PackageSet regex = FromRegEx(Cache, str, out);
+ if (regex.empty() == true)
+ _error->Warning(_("Unable to locate package %s"), str.c_str());
+ return regex;
+}
+ /*}}}*/
+// FromCommandLine - Return all versions specified on commandline /*{{{*/
+APT::VersionSet VersionSet::FromCommandLine(pkgCacheFile &Cache, const char **cmdline,
+ APT::VersionSet::Version const &fallback, std::ostream &out) {
+ VersionSet verset;
+ for (const char **I = cmdline; *I != 0; ++I) {
+ std::string pkg = *I;
+ std::string ver;
+ bool verIsRel = false;
+ size_t const vertag = pkg.find_last_of("/=");
+ if (vertag != string::npos) {
+ ver = pkg.substr(vertag+1);
+ verIsRel = (pkg[vertag] == '/');
+ pkg.erase(vertag);
+ }
+ PackageSet pkgset = PackageSet::FromString(Cache, pkg.c_str(), out);
+ for (PackageSet::const_iterator P = pkgset.begin();
+ P != pkgset.end(); ++P) {
+ if (vertag == string::npos) {
+ AddSelectedVersion(Cache, verset, P, fallback);
+ continue;
+ }
+ pkgCache::VerIterator V;
+ if (ver == "installed")
+ V = getInstalledVer(Cache, P);
+ else if (ver == "candidate")
+ V = getCandidateVer(Cache, P);
+ else {
+ pkgVersionMatch Match(ver, (verIsRel == true ? pkgVersionMatch::Release :
+ pkgVersionMatch::Version));
+ V = Match.Find(P);
+ if (V.end() == true) {
+ if (verIsRel == true)
+ _error->Error(_("Release '%s' for '%s' was not found"),
+ ver.c_str(), P.FullName(true).c_str());
+ else
+ _error->Error(_("Version '%s' for '%s' was not found"),
+ ver.c_str(), P.FullName(true).c_str());
+ continue;
+ }
+ }
+ if (V.end() == true)
+ continue;
+ if (ver == V.VerStr())
+ ioprintf(out, _("Selected version '%s' (%s) for '%s'\n"),
+ V.VerStr(), V.RelStr().c_str(), P.FullName(true).c_str());
+ verset.insert(V);
+ }
+ }
+ return verset;
+}
+ /*}}}*/
+// AddSelectedVersion - add version from package based on fallback /*{{{*/
+bool VersionSet::AddSelectedVersion(pkgCacheFile &Cache, VersionSet &verset,
+ pkgCache::PkgIterator const &P, VersionSet::Version const &fallback,
+ bool const &AllowError) {
+ pkgCache::VerIterator V;
+ switch(fallback) {
+ case VersionSet::ALL:
+ if (P->VersionList != 0)
+ for (V = P.VersionList(); V.end() != true; ++V)
+ verset.insert(V);
+ else if (AllowError == false)
+ return _error->Error(_("Can't select versions from package '%s' as it purely virtual"), P.FullName(true).c_str());
+ else
+ return false;
+ break;
+ case VersionSet::CANDANDINST:
+ verset.insert(getInstalledVer(Cache, P, AllowError));
+ verset.insert(getCandidateVer(Cache, P, AllowError));
+ break;
+ case VersionSet::CANDIDATE:
+ verset.insert(getCandidateVer(Cache, P, AllowError));
+ break;
+ case VersionSet::INSTALLED:
+ verset.insert(getInstalledVer(Cache, P, AllowError));
+ break;
+ case VersionSet::CANDINST:
+ V = getCandidateVer(Cache, P, true);
+ if (V.end() == true)
+ V = getInstalledVer(Cache, P, true);
+ if (V.end() == false)
+ verset.insert(V);
+ else if (AllowError == false)
+ return _error->Error(_("Can't select installed nor candidate version from package '%s' as it has neither of them"), P.FullName(true).c_str());
+ else
+ return false;
+ break;
+ case VersionSet::INSTCAND:
+ V = getInstalledVer(Cache, P, true);
+ if (V.end() == true)
+ V = getCandidateVer(Cache, P, true);
+ if (V.end() == false)
+ verset.insert(V);
+ else if (AllowError == false)
+ return _error->Error(_("Can't select installed nor candidate version from package '%s' as it has neither of them"), P.FullName(true).c_str());
+ else
+ return false;
+ break;
+ case VersionSet::NEWEST:
+ if (P->VersionList != 0)
+ verset.insert(P.VersionList());
+ else if (AllowError == false)
+ return _error->Error(_("Can't select newest version from package '%s' as it is purely virtual"), P.FullName(true).c_str());
+ else
+ return false;
+ break;
+ }
+ return true;
+}
+ /*}}}*/
+// getCandidateVer - Returns the candidate version of the given package /*{{{*/
+pkgCache::VerIterator VersionSet::getCandidateVer(pkgCacheFile &Cache,
+ pkgCache::PkgIterator const &Pkg, bool const &AllowError) {
+ if (unlikely(Cache.BuildDepCache() == false))
+ return pkgCache::VerIterator(*Cache);
+ pkgCache::VerIterator Cand = Cache[Pkg].CandidateVerIter(Cache);
+ if (AllowError == false && Cand.end() == true)
+ _error->Error(_("Can't select candidate version from package %s as it has no candidate"), Pkg.FullName(true).c_str());
+ return Cand;
+}
+ /*}}}*/
+// getInstalledVer - Returns the installed version of the given package /*{{{*/
+pkgCache::VerIterator VersionSet::getInstalledVer(pkgCacheFile &Cache,
+ pkgCache::PkgIterator const &Pkg, bool const &AllowError) {
+ if (AllowError == false && Pkg->CurrentVer == 0)
+ _error->Error(_("Can't select installed version from package %s as it is not installed"), Pkg.FullName(true).c_str());
+ return Pkg.CurrentVer();
+}
+ /*}}}*/
+}