X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/b9dacd11a4707092f070d49b1cb1acff642eebf0..304731b8f23e03d15d1c2d6f66e1bf5f26ac0ca2:/apt-pkg/aptconfiguration.cc?ds=sidebyside

diff --git a/apt-pkg/aptconfiguration.cc b/apt-pkg/aptconfiguration.cc
index 899004d9f..e32e553a4 100644
--- a/apt-pkg/aptconfiguration.cc
+++ b/apt-pkg/aptconfiguration.cc
@@ -8,13 +8,23 @@
    ##################################################################### */
 									/*}}}*/
 // Include Files							/*{{{*/
-#include <apt-pkg/fileutl.h>
+#include <config.h>
+
 #include <apt-pkg/aptconfiguration.h>
 #include <apt-pkg/configuration.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/macros.h>
+#include <apt-pkg/strutl.h>
+
+#include <sys/types.h>
+#include <dirent.h>
+#include <stdio.h>
+#include <fcntl.h>
 
-#include <vector>
-#include <string>
 #include <algorithm>
+#include <string>
+#include <vector>
 									/*}}}*/
 namespace APT {
 // getCompressionTypes - Return Vector of usbale compressiontypes	/*{{{*/
@@ -32,12 +42,12 @@ const Configuration::getCompressionTypes(bool const &Cached) {
 
 	// setup the defaults for the compressiontypes => method mapping
 	_config->CndSet("Acquire::CompressionTypes::bz2","bzip2");
+	_config->CndSet("Acquire::CompressionTypes::xz","xz");
 	_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");
+	setDefaultConfigurationForCompressors();
+	std::vector<APT::Configuration::Compressor> const compressors = getCompressors();
 
 	// accept non-list order as override setting for config settings on commandline
 	std::string const overrideOrder = _config->Find("Acquire::CompressionTypes::Order","");
@@ -47,19 +57,21 @@ const Configuration::getCompressionTypes(bool const &Cached) {
 	// 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++) {
+	     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)
+		std::string const method = std::string("Acquire::CompressionTypes::").append(*o);
+		if (_config->Exists(method) == 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;
-		}
+		std::string const app = _config->Find(method);
+		std::vector<APT::Configuration::Compressor>::const_iterator c = compressors.begin();
+		for (; c != compressors.end(); ++c)
+			if (c->Name == app)
+				break;
+		if (c == compressors.end())
+			continue;
 		types.push_back(*o);
 	}
 
@@ -75,15 +87,23 @@ const Configuration::getCompressionTypes(bool const &Cached) {
 		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;
-		}
+		std::vector<APT::Configuration::Compressor>::const_iterator c = compressors.begin();
+		for (; c != compressors.end(); ++c)
+			if (c->Name == Types->Value)
+				break;
+		if (c == compressors.end())
+			continue;
 		types.push_back(Types->Tag);
 	}
 
+	// add the special "uncompressed" type
+	if (std::find(types.begin(), types.end(), "uncompressed") == types.end())
+	{
+		std::string const uncompr = _config->FindFile("Dir::Bin::uncompressed", "");
+		if (uncompr.empty() == true || FileExists(uncompr) == true)
+			types.push_back("uncompressed");
+	}
+
 	return types;
 }
 									/*}}}*/
@@ -96,7 +116,7 @@ const Configuration::getCompressionTypes(bool const &Cached) {
    will result in "de_DE, de, en".
    The special word "none" is the stopcode for the not-All code vector */
 std::vector<std::string> const Configuration::getLanguages(bool const &All,
-				bool const &Cached, char const * const Locale) {
+				bool const &Cached, char const ** const Locale) {
 	using std::string;
 
 	// The detection is boring and has a lot of cornercases,
@@ -117,110 +137,425 @@ std::vector<std::string> const Configuration::getLanguages(bool const &All,
 		}
 	}
 
-	// get the environment language code
-	// we extract both, a long and a short code and then we will
-	// check if we actually need both (rare) or if the short is enough
-	string const envMsg = string(Locale == 0 ? std::setlocale(LC_MESSAGES, NULL) : Locale);
-	size_t const lenShort = (envMsg.find('_') != string::npos) ? envMsg.find('_') : 2;
-	size_t const lenLong = (envMsg.find('.') != string::npos) ? envMsg.find('.') : (lenShort + 3);
-
-	string envLong = envMsg.substr(0,lenLong);
-	string const envShort = envLong.substr(0,lenShort);
-	bool envLongIncluded = true, envShortIncluded = false;
-
-	// first cornercase: LANG=C, so we use only "en" Translation
-	if (envLong == "C") {
-		codes.push_back("en");
-		return codes;
-	}
-
-	if (envLong != envShort) {
-		// to save the servers from unneeded queries, we only try also long codes
-		// for languages it is realistic to have a long code translation file...
-		char const *needLong[] = { "cs", "en", "pt", "sv", "zh", NULL };
-		for (char const **l = needLong; *l != NULL; l++)
-			if (envShort.compare(*l) == 0) {
-				envLongIncluded = false;
-				break;
+	// Include all Language codes we have a Translation file for in /var/lib/apt/lists
+	// so they will be all included in the Cache.
+	std::vector<string> builtin;
+	DIR *D = opendir(_config->FindDir("Dir::State::lists").c_str());
+	if (D != 0) {
+		builtin.push_back("none");
+		for (struct dirent *Ent = readdir(D); Ent != 0; Ent = readdir(D)) {
+			string const name = SubstVar(Ent->d_name, "%5f", "_");
+			size_t const foundDash = name.rfind("-");
+			size_t const foundUnderscore = name.rfind("_", foundDash);
+			if (foundDash == string::npos || foundUnderscore == string::npos ||
+			    foundDash <= foundUnderscore ||
+			    name.substr(foundUnderscore+1, foundDash-(foundUnderscore+1)) != "Translation")
+				continue;
+			string const c = name.substr(foundDash+1);
+			if (unlikely(c.empty() == true) || c == "en")
+				continue;
+			// Skip unusual files, like backups or that alike
+			string::const_iterator s = c.begin();
+			for (;s != c.end(); ++s) {
+				if (isalpha(*s) == 0 && *s != '_')
+					break;
 			}
+			if (s != c.end())
+				continue;
+			if (std::find(builtin.begin(), builtin.end(), c) != builtin.end())
+				continue;
+			builtin.push_back(c);
+		}
 	}
-
-	// we don't add the long code, but we allow the user to do so
-	if (envLongIncluded == true)
-		envLong.clear();
+	closedir(D);
 
 	// FIXME: Remove support for the old APT::Acquire::Translation
 	// it was undocumented and so it should be not very widthly used
 	string const oldAcquire = _config->Find("APT::Acquire::Translation","");
 	if (oldAcquire.empty() == false && oldAcquire != "environment") {
+		// TRANSLATORS: the two %s are APT configuration options
+		_error->Notice("Option '%s' is deprecated. Please use '%s' instead, see 'man 5 apt.conf' for details.",
+				"APT::Acquire::Translation", "Acquire::Languages");
 		if (oldAcquire != "none")
 			codes.push_back(oldAcquire);
-		return codes;
+		codes.push_back("en");
+		allCodes = codes;
+		for (std::vector<string>::const_iterator b = builtin.begin();
+		     b != builtin.end(); ++b)
+			if (std::find(allCodes.begin(), allCodes.end(), *b) == allCodes.end())
+				allCodes.push_back(*b);
+		if (All == true)
+			return allCodes;
+		else
+			return codes;
+	}
+
+	// get the environment language codes: LC_MESSAGES (and later LANGUAGE)
+	// we extract both, a long and a short code and then we will
+	// check if we actually need both (rare) or if the short is enough
+	string const envMsg = string(Locale == 0 ? std::setlocale(LC_MESSAGES, NULL) : *Locale);
+	size_t const lenShort = (envMsg.find('_') != string::npos) ? envMsg.find('_') : 2;
+	size_t const lenLong = (envMsg.find_first_of(".@") != string::npos) ? envMsg.find_first_of(".@") : (lenShort + 3);
+
+	string const envLong = envMsg.substr(0,lenLong);
+	string const envShort = envLong.substr(0,lenShort);
+
+	// It is very likely we will need the environment codes later,
+	// so let us generate them now from LC_MESSAGES and LANGUAGE
+	std::vector<string> environment;
+	if (envShort != "C") {
+		// take care of LC_MESSAGES
+		if (envLong != envShort)
+			environment.push_back(envLong);
+		environment.push_back(envShort);
+		// take care of LANGUAGE
+		const char *language_env = getenv("LANGUAGE") == 0 ? "" : getenv("LANGUAGE");
+		string envLang = Locale == 0 ? language_env : *(Locale+1);
+		if (envLang.empty() == false) {
+			std::vector<string> env = VectorizeString(envLang,':');
+			short addedLangs = 0; // add a maximum of 3 fallbacks from the environment
+			for (std::vector<string>::const_iterator e = env.begin();
+			     e != env.end() && addedLangs < 3; ++e) {
+				if (unlikely(e->empty() == true) || *e == "en")
+					continue;
+				if (*e == envLong || *e == envShort)
+					continue;
+				if (std::find(environment.begin(), environment.end(), *e) != environment.end())
+					continue;
+				++addedLangs;
+				environment.push_back(*e);
+			}
+		}
+	} else {
+		environment.push_back("en");
 	}
 
-	// Support settings like Acquire::Translation=none on the command line to
+	// Support settings like Acquire::Languages=none on the command line to
 	// override the configuration settings vector of languages.
 	string const forceLang = _config->Find("Acquire::Languages","");
 	if (forceLang.empty() == false) {
-		if (forceLang == "environment") {
-			if (envLongIncluded == false)
-				codes.push_back(envLong);
-			if (envShortIncluded == false)
-				codes.push_back(envShort);
+		if (forceLang == "none") {
+			codes.clear();
+			allCodes.clear();
+			allCodes.push_back("none");
+		} else {
+			if (forceLang == "environment")
+				codes = environment;
+			else
+				codes.push_back(forceLang);
+			allCodes = codes;
+			for (std::vector<string>::const_iterator b = builtin.begin();
+			     b != builtin.end(); ++b)
+				if (std::find(allCodes.begin(), allCodes.end(), *b) == allCodes.end())
+					allCodes.push_back(*b);
+		}
+		if (All == true)
+			return allCodes;
+		else
+			return codes;
+	}
+
+	// cornercase: LANG=C, so we use only "en" Translation
+	if (envShort == "C") {
+		allCodes = codes = environment;
+		allCodes.insert(allCodes.end(), builtin.begin(), builtin.end());
+		if (All == true)
+			return allCodes;
+		else
 			return codes;
-		} else if (forceLang != "none")
-			codes.push_back(forceLang);
-		return codes;
 	}
 
 	std::vector<string> const lang = _config->FindVector("Acquire::Languages");
 	// the default setting -> "environment, en"
 	if (lang.empty() == true) {
-		if (envLongIncluded == false)
-			codes.push_back(envLong);
-		if (envShortIncluded == false)
-			codes.push_back(envShort);
+		codes = environment;
 		if (envShort != "en")
 			codes.push_back("en");
-		return codes;
+		allCodes = codes;
+		for (std::vector<string>::const_iterator b = builtin.begin();
+		     b != builtin.end(); ++b)
+			if (std::find(allCodes.begin(), allCodes.end(), *b) == allCodes.end())
+				allCodes.push_back(*b);
+		if (All == true)
+			return allCodes;
+		else
+			return codes;
 	}
 
 	// the configs define the order, so add the environment
 	// then needed and ensure the codes are not listed twice.
 	bool noneSeen = false;
 	for (std::vector<string>::const_iterator l = lang.begin();
-	     l != lang.end(); l++) {
+	     l != lang.end(); ++l) {
 		if (*l == "environment") {
-			if (envLongIncluded == true && envShortIncluded == true)
-				continue;
-			if (envLongIncluded == false) {
-				envLongIncluded = true;
-				if (noneSeen == false)
-					codes.push_back(envLong);
-				allCodes.push_back(envLong);
-			}
-			if (envShortIncluded == false) {
-				envShortIncluded = true;
+			for (std::vector<string>::const_iterator e = environment.begin();
+			     e != environment.end(); ++e) {
+				if (std::find(allCodes.begin(), allCodes.end(), *e) != allCodes.end())
+					continue;
 				if (noneSeen == false)
-					codes.push_back(envShort);
-				allCodes.push_back(envShort);
+					codes.push_back(*e);
+				allCodes.push_back(*e);
 			}
 			continue;
 		} else if (*l == "none") {
 			noneSeen = true;
 			continue;
-		} else if ((envLongIncluded == true && *l == envLong) ||
-		         (envShortIncluded == true && *l == envShort))
+		} else if (std::find(allCodes.begin(), allCodes.end(), *l) != allCodes.end())
 			continue;
 
 		if (noneSeen == false)
 			codes.push_back(*l);
 		allCodes.push_back(*l);
 	}
+
+	for (std::vector<string>::const_iterator b = builtin.begin();
+	     b != builtin.end(); ++b)
+		if (std::find(allCodes.begin(), allCodes.end(), *b) == allCodes.end())
+			allCodes.push_back(*b);
+
 	if (All == true)
 		return allCodes;
 	else
 		return codes;
 }
 									/*}}}*/
+// checkLanguage - are we interested in the given Language?		/*{{{*/
+bool const Configuration::checkLanguage(std::string Lang, bool const All) {
+	// the empty Language is always interesting as it is the original
+	if (Lang.empty() == true)
+		return true;
+	// filenames are encoded, so undo this
+	Lang = SubstVar(Lang, "%5f", "_");
+	std::vector<std::string> const langs = getLanguages(All, true);
+	return (std::find(langs.begin(), langs.end(), Lang) != langs.end());
+}
+									/*}}}*/
+// getArchitectures - Return Vector of prefered Architectures		/*{{{*/
+std::vector<std::string> const Configuration::getArchitectures(bool const &Cached) {
+	using std::string;
+
+	std::vector<string> static archs;
+	if (likely(Cached == true) && archs.empty() == false)
+		return archs;
+
+	string const arch = _config->Find("APT::Architecture");
+	archs = _config->FindVector("APT::Architectures");
+
+	if (unlikely(arch.empty() == true))
+		return archs;
+
+	// FIXME: It is a bit unclean to have debian specific code here…
+	if (archs.empty() == true) {
+		archs.push_back(arch);
+
+		// Generate the base argument list for dpkg
+		std::vector<const char *> Args;
+		string Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
+		{
+			string const dpkgChrootDir = _config->FindDir("DPkg::Chroot-Directory", "/");
+			size_t dpkgChrootLen = dpkgChrootDir.length();
+			if (dpkgChrootDir != "/" && Tmp.find(dpkgChrootDir) == 0) {
+				if (dpkgChrootDir[dpkgChrootLen - 1] == '/')
+					--dpkgChrootLen;
+				Tmp = Tmp.substr(dpkgChrootLen);
+			}
+		}
+		Args.push_back(Tmp.c_str());
+
+		// Stick in any custom dpkg options
+		::Configuration::Item const *Opts = _config->Tree("DPkg::Options");
+		if (Opts != 0) {
+			Opts = Opts->Child;
+			for (; Opts != 0; Opts = Opts->Next)
+			{
+				if (Opts->Value.empty() == true)
+					continue;
+				Args.push_back(Opts->Value.c_str());
+			}
+		}
+
+		Args.push_back("--print-foreign-architectures");
+		Args.push_back(NULL);
+
+		int external[2] = {-1, -1};
+		if (pipe(external) != 0)
+		{
+			_error->WarningE("getArchitecture", "Can't create IPC pipe for dpkg --print-foreign-architectures");
+			return archs;
+		}
+
+		pid_t dpkgMultiArch = ExecFork();
+		if (dpkgMultiArch == 0) {
+			close(external[0]);
+			std::string const chrootDir = _config->FindDir("DPkg::Chroot-Directory");
+			int const nullfd = open("/dev/null", O_RDONLY);
+			dup2(nullfd, STDIN_FILENO);
+			dup2(external[1], STDOUT_FILENO);
+			dup2(nullfd, STDERR_FILENO);
+			if (chrootDir != "/" && chroot(chrootDir.c_str()) != 0)
+				_error->WarningE("getArchitecture", "Couldn't chroot into %s for dpkg --print-foreign-architectures", chrootDir.c_str());
+			execvp(Args[0], (char**) &Args[0]);
+			_error->WarningE("getArchitecture", "Can't detect foreign architectures supported by dpkg!");
+			_exit(100);
+		}
+		close(external[1]);
+
+		FILE *dpkg = fdopen(external[0], "r");
+		if(dpkg != NULL) {
+			char buf[1024];
+			while (fgets(buf, sizeof(buf), dpkg) != NULL) {
+				char* arch = strtok(buf, " ");
+				while (arch != NULL) {
+					for (; isspace(*arch) != 0; ++arch);
+					if (arch[0] != '\0') {
+						char const* archend = arch;
+						for (; isspace(*archend) == 0 && *archend != '\0'; ++archend);
+						string a(arch, (archend - arch));
+						if (std::find(archs.begin(), archs.end(), a) == archs.end())
+							archs.push_back(a);
+					}
+					arch = strtok(NULL, " ");
+				}
+			}
+			fclose(dpkg);
+		}
+		ExecWait(dpkgMultiArch, "dpkg --print-foreign-architectures", true);
+		return archs;
+	}
+
+	if (archs.empty() == true ||
+	    std::find(archs.begin(), archs.end(), arch) == archs.end())
+		archs.insert(archs.begin(), arch);
+
+	// erase duplicates and empty strings
+	for (std::vector<string>::reverse_iterator a = archs.rbegin();
+	     a != archs.rend(); ++a) {
+		if (a->empty() == true || std::find(a + 1, archs.rend(), *a) != archs.rend())
+			archs.erase(a.base()-1);
+		if (a == archs.rend())
+			break;
+	}
+
+	return archs;
+}
+									/*}}}*/
+// checkArchitecture - are we interested in the given Architecture?	/*{{{*/
+bool const Configuration::checkArchitecture(std::string const &Arch) {
+	if (Arch == "all")
+		return true;
+	std::vector<std::string> const archs = getArchitectures(true);
+	return (std::find(archs.begin(), archs.end(), Arch) != archs.end());
+}
+									/*}}}*/
+// setDefaultConfigurationForCompressors				/*{{{*/
+void Configuration::setDefaultConfigurationForCompressors() {
+	// Set default application paths to check for optional compression types
+	_config->CndSet("Dir::Bin::bzip2", "/bin/bzip2");
+	_config->CndSet("Dir::Bin::xz", "/usr/bin/xz");
+	if (FileExists(_config->FindFile("Dir::Bin::xz")) == true) {
+		_config->Clear("Dir::Bin::lzma");
+		_config->Set("APT::Compressor::lzma::Binary", "xz");
+		if (_config->Exists("APT::Compressor::lzma::CompressArg") == false) {
+			_config->Set("APT::Compressor::lzma::CompressArg::", "--format=lzma");
+			_config->Set("APT::Compressor::lzma::CompressArg::", "-9");
+		}
+		if (_config->Exists("APT::Compressor::lzma::UncompressArg") == false) {
+			_config->Set("APT::Compressor::lzma::UncompressArg::", "--format=lzma");
+			_config->Set("APT::Compressor::lzma::UncompressArg::", "-d");
+		}
+	} else {
+		_config->CndSet("Dir::Bin::lzma", "/usr/bin/lzma");
+		if (_config->Exists("APT::Compressor::lzma::CompressArg") == false) {
+			_config->Set("APT::Compressor::lzma::CompressArg::", "--suffix=");
+			_config->Set("APT::Compressor::lzma::CompressArg::", "-9");
+		}
+		if (_config->Exists("APT::Compressor::lzma::UncompressArg") == false) {
+			_config->Set("APT::Compressor::lzma::UncompressArg::", "--suffix=");
+			_config->Set("APT::Compressor::lzma::UncompressArg::", "-d");
+		}
+	}
+}
+									/*}}}*/
+// getCompressors - Return Vector of usbale compressors			/*{{{*/
+// ---------------------------------------------------------------------
+/* return a vector of compressors used by apt-ftparchive in the
+   multicompress functionality or to detect data.tar files */
+std::vector<APT::Configuration::Compressor>
+const Configuration::getCompressors(bool const Cached) {
+	static std::vector<APT::Configuration::Compressor> compressors;
+	if (compressors.empty() == false) {
+		if (Cached == true)
+			return compressors;
+		else
+			compressors.clear();
+	}
+
+	setDefaultConfigurationForCompressors();
+
+	compressors.push_back(Compressor(".", "", "", NULL, NULL, 1));
+	if (_config->Exists("Dir::Bin::gzip") == false || FileExists(_config->FindFile("Dir::Bin::gzip")) == true)
+		compressors.push_back(Compressor("gzip",".gz","gzip","-9n","-d",2));
+#ifdef HAVE_ZLIB
+	else
+		compressors.push_back(Compressor("gzip",".gz","false", NULL, NULL, 2));
+#endif
+	if (_config->Exists("Dir::Bin::bzip2") == false || FileExists(_config->FindFile("Dir::Bin::bzip2")) == true)
+		compressors.push_back(Compressor("bzip2",".bz2","bzip2","-9","-d",3));
+#ifdef HAVE_BZ2
+	else
+		compressors.push_back(Compressor("bzip2",".bz2","false", NULL, NULL, 3));
+#endif
+	if (_config->Exists("Dir::Bin::xz") == false || FileExists(_config->FindFile("Dir::Bin::xz")) == true)
+		compressors.push_back(Compressor("xz",".xz","xz","-6","-d",4));
+	if (_config->Exists("Dir::Bin::lzma") == false || FileExists(_config->FindFile("Dir::Bin::lzma")) == true)
+		compressors.push_back(Compressor("lzma",".lzma","lzma","-9","-d",5));
+
+	std::vector<std::string> const comp = _config->FindVector("APT::Compressor");
+	for (std::vector<std::string>::const_iterator c = comp.begin();
+	     c != comp.end(); ++c) {
+		if (*c == "." || *c == "gzip" || *c == "bzip2" || *c == "lzma" || *c == "xz")
+			continue;
+		compressors.push_back(Compressor(c->c_str(), std::string(".").append(*c).c_str(), c->c_str(), "-9", "-d", 100));
+	}
+
+	return compressors;
+}
+									/*}}}*/
+// getCompressorExtensions - supported data.tar extensions		/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+std::vector<std::string> const Configuration::getCompressorExtensions() {
+	std::vector<APT::Configuration::Compressor> const compressors = getCompressors();
+	std::vector<std::string> ext;
+	for (std::vector<APT::Configuration::Compressor>::const_iterator c = compressors.begin();
+	     c != compressors.end(); ++c)
+		if (c->Extension.empty() == false && c->Extension != ".")
+			ext.push_back(c->Extension);
+	return ext;
+}
+									/*}}}*/
+// Compressor constructor						/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+Configuration::Compressor::Compressor(char const *name, char const *extension,
+				      char const *binary,
+				      char const *compressArg, char const *uncompressArg,
+				      unsigned short const cost) {
+	std::string const config = std::string("APT::Compressor::").append(name).append("::");
+	Name = _config->Find(std::string(config).append("Name"), name);
+	Extension = _config->Find(std::string(config).append("Extension"), extension);
+	Binary = _config->Find(std::string(config).append("Binary"), binary);
+	Cost = _config->FindI(std::string(config).append("Cost"), cost);
+	std::string const compConf = std::string(config).append("CompressArg");
+	if (_config->Exists(compConf) == true)
+		CompressArgs = _config->FindVector(compConf);
+	else if (compressArg != NULL)
+		CompressArgs.push_back(compressArg);
+	std::string const uncompConf = std::string(config).append("UncompressArg");
+	if (_config->Exists(uncompConf) == true)
+		UncompressArgs = _config->FindVector(uncompConf);
+	else if (uncompressArg != NULL)
+		UncompressArgs.push_back(uncompressArg);
+}
+									/*}}}*/
 }