* cmdline/cacheset.cc:

  - doesn't include it in the library for now as it is too volatile

1 files changed, 330 insertions, 0 deletions

diff --git a/cmdline/cacheset.cc b/cmdline/cacheset.cc
new file mode 100644
index 000000000..fde52168a
--- /dev/null
+++ b/cmdline/cacheset.cc
@@ -0,0 +1,330 @@
+// -*- 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;
+}
+									/*}}}*/
+// GroupedFromCommandLine - Return all versions specified on commandline/*{{{*/
+std::map<unsigned short, VersionSet> VersionSet::GroupedFromCommandLine(
+		pkgCacheFile &Cache, const char **cmdline,
+		std::list<VersionSet::Modifier> const &mods,
+		unsigned short const &fallback, std::ostream &out) {
+	std::map<unsigned short, VersionSet> versets;
+	for (const char **I = cmdline; *I != 0; ++I) {
+		unsigned short modID = fallback;
+		VersionSet::Version select = VersionSet::NEWEST;
+		std::string str = *I;
+		for (std::list<VersionSet::Modifier>::const_iterator mod = mods.begin();
+		     mod != mods.end(); ++mod) {
+			if (modID == fallback && mod->ID == fallback)
+				select = mod->SelectVersion;
+			size_t const alength = strlen(mod->Alias);
+			switch(mod->Pos) {
+			case VersionSet::Modifier::POSTFIX:
+				if (str.compare(str.length() - alength, alength,
+						mod->Alias, 0, alength) != 0)
+					continue;
+				str.erase(str.length() - alength);
+				modID = mod->ID;
+				select = mod->SelectVersion;
+				break;
+			case VersionSet::Modifier::PREFIX:
+				continue;
+			case VersionSet::Modifier::NONE:
+				continue;
+			}
+			break;
+		}
+		VersionSet vset = VersionSet::FromString(Cache, str, select , out);
+		versets[modID].insert(vset.begin(), vset.end());
+	}
+	return versets;
+}
+									/*}}}*/
+// 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) {
+		VersionSet vset = VersionSet::FromString(Cache, *I, fallback, out);
+		verset.insert(vset.begin(), vset.end());
+	}
+	return verset;
+}
+									/*}}}*/
+// FromString - Returns all versions spedcified by a string		/*{{{*/
+APT::VersionSet VersionSet::FromString(pkgCacheFile &Cache, std::string pkg,
+		APT::VersionSet::Version const &fallback, std::ostream &out) {
+	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);
+	VersionSet verset;
+	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) {
+	pkgCache::VerIterator Cand;
+	if (Cache.IsDepCacheBuilt() == true)
+		Cand = Cache[Pkg].CandidateVerIter(Cache);
+	else {
+		if (unlikely(Cache.BuildPolicy() == false))
+			return pkgCache::VerIterator(*Cache);
+		Cand = Cache.GetPolicy()->GetCandidateVer(Pkg);
+	}
+	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();
+}
+									/*}}}*/
+}