// -*- mode: cpp; mode: fold -*- // Description /*{{{*/ /* ###################################################################### Provide access methods to various configuration settings, setup defaults and returns validate settings. ##################################################################### */ /*}}}*/ // Include Files /*{{{*/ #include <apt-pkg/fileutl.h> #include <apt-pkg/aptconfiguration.h> #include <apt-pkg/configuration.h> #include <vector> #include <string> #include <algorithm> /*}}}*/ namespace APT { // getCompressionTypes - Return Vector of usbale compressiontypes /*{{{*/ // --------------------------------------------------------------------- /* return a vector of compression types in the prefered order. */ std::vector<std::string> const Configuration::getCompressionTypes(bool const &Cached) { static std::vector<std::string> types; if (types.empty() == false) { if (Cached == true) return types; else types.clear(); } // setup the defaults for the compressiontypes => method mapping _config->CndSet("Acquire::CompressionTypes::bz2","bzip2"); _config->CndSet("Acquire::CompressionTypes::lzma","lzma"); _config->CndSet("Acquire::CompressionTypes::gz","gzip"); // Set default application paths to check for optional compression types _config->CndSet("Dir::Bin::lzma", "/usr/bin/lzma"); _config->CndSet("Dir::Bin::bzip2", "/bin/bzip2"); // accept non-list order as override setting for config settings on commandline std::string const overrideOrder = _config->Find("Acquire::CompressionTypes::Order",""); if (overrideOrder.empty() == false) types.push_back(overrideOrder); // load the order setting into our vector std::vector<std::string> const order = _config->FindVector("Acquire::CompressionTypes::Order"); for (std::vector<std::string>::const_iterator o = order.begin(); o != order.end(); o++) { if ((*o).empty() == true) continue; // ignore types we have no method ready to use if (_config->Exists(string("Acquire::CompressionTypes::").append(*o)) == false) continue; // ignore types we have no app ready to use string const appsetting = string("Dir::Bin::").append(*o); if (_config->Exists(appsetting) == true) { std::string const app = _config->FindFile(appsetting.c_str(), ""); if (app.empty() == false && FileExists(app) == false) continue; } types.push_back(*o); } // move again over the option tree to add all missing compression types ::Configuration::Item const *Types = _config->Tree("Acquire::CompressionTypes"); if (Types != 0) Types = Types->Child; for (; Types != 0; Types = Types->Next) { if (Types->Tag == "Order" || Types->Tag.empty() == true) continue; // ignore types we already have in the vector if (std::find(types.begin(),types.end(),Types->Tag) != types.end()) continue; // ignore types we have no app ready to use string const appsetting = string("Dir::Bin::").append(Types->Value); if (appsetting.empty() == false && _config->Exists(appsetting) == true) { std::string const app = _config->FindFile(appsetting.c_str(), ""); if (app.empty() == false && FileExists(app) == false) continue; } types.push_back(Types->Tag); } return types; } /*}}}*/ }