[apt.git] / apt-pkg / aptconfiguration.cc

// -*- mode: cpp; mode: fold -*-
// Description								/*{{{*/
/* ######################################################################

   Provide access methods to various configuration settings,
   setup defaults and returns validate settings.

   ##################################################################### */
									/*}}}*/
// Include Files							/*{{{*/
#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 <algorithm>
#include <string>
#include <vector>
									/*}}}*/
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::xz","xz");
	_config->CndSet("Acquire::CompressionTypes::lzma","lzma");
	_config->CndSet("Acquire::CompressionTypes::gz","gzip");

	setDefaultConfigurationForCompressors();

	// 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(std::string("Acquire::CompressionTypes::").append(*o)) == false)
			continue;
		// ignore types we have no app ready to use
		std::string const appsetting = std::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
		std::string const appsetting = std::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);
	}

	// 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;
}
									/*}}}*/
// GetLanguages - Return Vector of Language Codes			/*{{{*/
// ---------------------------------------------------------------------
/* return a vector of language codes in the prefered order.
   the special word "environment" will be replaced with the long and the short
   code of the local settings and it will be insured that this will not add
   duplicates. So in an german local the setting "environment, de_DE, en, de"
   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) {
	using std::string;

	// The detection is boring and has a lot of cornercases,
	// so we cache the results to calculated it only once.
	std::vector<string> static allCodes;
	std::vector<string> static codes;

	// we have something in the cache
	if (codes.empty() == false || allCodes.empty() == false) {
		if (Cached == true) {
			if(All == true && allCodes.empty() == false)
				return allCodes;
			else
				return codes;
		} else {
			allCodes.clear();
			codes.clear();
		}
	}

	// 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 = Ent->d_name;
			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);
		}
	}
	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);
		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::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") {
			codes = environment;
		} else if (forceLang != "none")
			codes.push_back(forceLang);
		else //if (forceLang == "none")
			builtin.clear();
		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;
	}

	std::vector<string> const lang = _config->FindVector("Acquire::Languages");
	// the default setting -> "environment, en"
	if (lang.empty() == true) {
		codes = environment;
		if (envShort != "en")
			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;
	}

	// 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) {
		if (*l == "environment") {
			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(*e);
				allCodes.push_back(*e);
			}
			continue;
		} else if (*l == "none") {
			noneSeen = true;
			continue;
		} 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;
}
									/*}}}*/
// 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);
		string dpkgcall = _config->Find("Dir::Bin::dpkg", "dpkg");
		std::vector<string> const dpkgoptions = _config->FindVector("DPkg::options");
		for (std::vector<string>::const_iterator o = dpkgoptions.begin();
		     o != dpkgoptions.end(); ++o)
			dpkgcall.append(" ").append(*o);
		dpkgcall.append(" --print-foreign-architectures 2> /dev/null");
		FILE *dpkg = popen(dpkgcall.c_str(), "r");
		char buf[1024];
		if(dpkg != NULL) {
			if (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);
						archs.push_back(string(arch, (archend - arch)));
					}
					arch = strtok(NULL, " ");
				}
			}
			pclose(dpkg);
		}
		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::lzma", "/usr/bin/lzma");
	_config->CndSet("Dir::Bin::xz", "/usr/bin/xz");
	_config->CndSet("Dir::Bin::bzip2", "/bin/bzip2");
}
									/*}}}*/
// 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(".", "", "", "", "", 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));
	if (_config->Exists("Dir::Bin::bzip2") == false || FileExists(_config->FindFile("Dir::Bin::bzip2")) == true)
		compressors.push_back(Compressor("bzip2",".bz2","bzip2","-9","-d",3));
	if (_config->Exists("Dir::Bin::lzma") == false || FileExists(_config->FindFile("Dir::Bin::lzma")) == true)
		compressors.push_back(Compressor("lzma",".lzma","lzma","-9","-d",4));
	if (_config->Exists("Dir::Bin::xz") == false || FileExists(_config->FindFile("Dir::Bin::xz")) == true)
		compressors.push_back(Compressor("xz",".xz","xz","-6","-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);
}
									/*}}}*/
}
Commit	Line	Data
e878aedb DK	1	// -- mode: cpp; mode: fold --
	2	// Description /{{{/
	3	/* ######################################################################
	4
	5	Provide access methods to various configuration settings,
	6	setup defaults and returns validate settings.
	7
	8	##################################################################### */
	9	/}}}/
	10	// Include Files /{{{/
ea542140 DK	11	#include <config.h>
ea542140 DK	12
e878aedb DK	13	#include <apt-pkg/aptconfiguration.h>
e878aedb DK	14	#include <apt-pkg/configuration.h>
9f9717fa	15	#include <apt-pkg/error.h>
d7cf5923 DK	16	#include <apt-pkg/fileutl.h>
	17	#include <apt-pkg/macros.h>
	18	#include <apt-pkg/strutl.h>
e878aedb	19
3f2d77b5 DK	20	#include <sys/types.h>
3f2d77b5 DK	21	#include <dirent.h>
8aec002f	22	#include <stdio.h>
3f2d77b5	23
8bd02d8b	24	#include <algorithm>
3f2d77b5 DK	25	#include <string>
3f2d77b5 DK	26	#include <vector>
e878aedb DK	27	/}}}/
	28	namespace APT {
	29	// getCompressionTypes - Return Vector of usbale compressiontypes /{{{/
	30	// ---------------------------------------------------------------------
	31	/* return a vector of compression types in the prefered order. */
	32	std::vector<std::string>
	33	const Configuration::getCompressionTypes(bool const &Cached) {
	34	static std::vector<std::string> types;
	35	if (types.empty() == false) {
	36	if (Cached == true)
	37	return types;
	38	else
	39	types.clear();
	40	}
	41
8bd02d8b DK	42	// setup the defaults for the compressiontypes => method mapping
8bd02d8b DK	43	_config->CndSet("Acquire::CompressionTypes::bz2","bzip2");
b2430e6d	44	_config->CndSet("Acquire::CompressionTypes::xz","xz");
8bd02d8b DK	45	_config->CndSet("Acquire::CompressionTypes::lzma","lzma");
	46	_config->CndSet("Acquire::CompressionTypes::gz","gzip");
	47
03bef784	48	setDefaultConfigurationForCompressors();
e878aedb	49
8bd02d8b DK	50	// accept non-list order as override setting for config settings on commandline
	51	std::string const overrideOrder = _config->Find("Acquire::CompressionTypes::Order","");
	52	if (overrideOrder.empty() == false)
	53	types.push_back(overrideOrder);
e878aedb	54
8bd02d8b DK	55	// load the order setting into our vector
	56	std::vector<std::string> const order = _config->FindVector("Acquire::CompressionTypes::Order");
	57	for (std::vector<std::string>::const_iterator o = order.begin();
f7f0d6c7	58	o != order.end(); ++o) {
8bd02d8b DK	59	if ((*o).empty() == true)
	60	continue;
	61	// ignore types we have no method ready to use
8f3ba4e8	62	if (_config->Exists(std::string("Acquire::CompressionTypes::").append(*o)) == false)
8bd02d8b DK	63	continue;
8bd02d8b DK	64	// ignore types we have no app ready to use
8f3ba4e8	65	std::string const appsetting = std::string("Dir::Bin::").append(*o);
8bd02d8b DK	66	if (_config->Exists(appsetting) == true) {
	67	std::string const app = _config->FindFile(appsetting.c_str(), "");
	68	if (app.empty() == false && FileExists(app) == false)
	69	continue;
	70	}
	71	types.push_back(*o);
e878aedb DK	72	}
e878aedb DK	73
8bd02d8b	74	// move again over the option tree to add all missing compression types
e878aedb DK	75	::Configuration::Item const *Types = _config->Tree("Acquire::CompressionTypes");
	76	if (Types != 0)
	77	Types = Types->Child;
	78
	79	for (; Types != 0; Types = Types->Next) {
8bd02d8b DK	80	if (Types->Tag == "Order" \|\| Types->Tag.empty() == true)
	81	continue;
	82	// ignore types we already have in the vector
	83	if (std::find(types.begin(),types.end(),Types->Tag) != types.end())
	84	continue;
	85	// ignore types we have no app ready to use
8f3ba4e8	86	std::string const appsetting = std::string("Dir::Bin::").append(Types->Value);
e878aedb DK	87	if (appsetting.empty() == false && _config->Exists(appsetting) == true) {
	88	std::string const app = _config->FindFile(appsetting.c_str(), "");
	89	if (app.empty() == false && FileExists(app) == false)
	90	continue;
	91	}
	92	types.push_back(Types->Tag);
	93	}
	94
5d885723 DK	95	// add the special "uncompressed" type
	96	if (std::find(types.begin(), types.end(), "uncompressed") == types.end())
	97	{
8f3ba4e8	98	std::string const uncompr = _config->FindFile("Dir::Bin::uncompressed", "");
5d885723 DK	99	if (uncompr.empty() == true \|\| FileExists(uncompr) == true)
	100	types.push_back("uncompressed");
	101	}
	102
e878aedb DK	103	return types;
	104	}
	105	/}}}/
45df0ad2 DK	106	// GetLanguages - Return Vector of Language Codes /{{{/
	107	// ---------------------------------------------------------------------
	108	/* return a vector of language codes in the prefered order.
	109	the special word "environment" will be replaced with the long and the short
	110	code of the local settings and it will be insured that this will not add
	111	duplicates. So in an german local the setting "environment, de_DE, en, de"
	112	will result in "de_DE, de, en".
	113	The special word "none" is the stopcode for the not-All code vector */
	114	std::vector<std::string> const Configuration::getLanguages(bool const &All,
d7cf5923	115	bool const &Cached, char const ** const Locale) {
45df0ad2 DK	116	using std::string;
	117
	118	// The detection is boring and has a lot of cornercases,
	119	// so we cache the results to calculated it only once.
	120	std::vector<string> static allCodes;
	121	std::vector<string> static codes;
	122
	123	// we have something in the cache
	124	if (codes.empty() == false \|\| allCodes.empty() == false) {
	125	if (Cached == true) {
	126	if(All == true && allCodes.empty() == false)
	127	return allCodes;
	128	else
	129	return codes;
	130	} else {
	131	allCodes.clear();
	132	codes.clear();
	133	}
	134	}
	135
3f2d77b5 DK	136	// Include all Language codes we have a Translation file for in /var/lib/apt/lists
	137	// so they will be all included in the Cache.
	138	std::vector<string> builtin;
	139	DIR *D = opendir(_config->FindDir("Dir::State::lists").c_str());
	140	if (D != 0) {
	141	builtin.push_back("none");
	142	for (struct dirent *Ent = readdir(D); Ent != 0; Ent = readdir(D)) {
	143	string const name = Ent->d_name;
	144	size_t const foundDash = name.rfind("-");
7cb28948	145	size_t const foundUnderscore = name.rfind("_", foundDash);
3f2d77b5 DK	146	if (foundDash == string::npos \|\| foundUnderscore == string::npos \|\|
	147	foundDash <= foundUnderscore \|\|
	148	name.substr(foundUnderscore+1, foundDash-(foundUnderscore+1)) != "Translation")
	149	continue;
	150	string const c = name.substr(foundDash+1);
	151	if (unlikely(c.empty() == true) \|\| c == "en")
	152	continue;
	153	// Skip unusual files, like backups or that alike
	154	string::const_iterator s = c.begin();
	155	for (;s != c.end(); ++s) {
7cb28948	156	if (isalpha(s) == 0 && s != '_')
3f2d77b5 DK	157	break;
	158	}
	159	if (s != c.end())
	160	continue;
	161	if (std::find(builtin.begin(), builtin.end(), c) != builtin.end())
	162	continue;
	163	builtin.push_back(c);
	164	}
	165	}
cf0e078c	166	closedir(D);
3f2d77b5	167
45df0ad2 DK	168	// FIXME: Remove support for the old APT::Acquire::Translation
	169	// it was undocumented and so it should be not very widthly used
	170	string const oldAcquire = _config->Find("APT::Acquire::Translation","");
	171	if (oldAcquire.empty() == false && oldAcquire != "environment") {
9f9717fa DK	172	// TRANSLATORS: the two %s are APT configuration options
	173	_error->Notice("Option '%s' is deprecated. Please use '%s' instead, see 'man 5 apt.conf' for details.",
	174	"APT::Acquire::Translation", "Acquire::Languages");
45df0ad2 DK	175	if (oldAcquire != "none")
45df0ad2 DK	176	codes.push_back(oldAcquire);
3f2d77b5	177	codes.push_back("en");
d7cf5923	178	allCodes = codes;
3f2d77b5 DK	179	for (std::vector<string>::const_iterator b = builtin.begin();
	180	b != builtin.end(); ++b)
	181	if (std::find(allCodes.begin(), allCodes.end(), *b) == allCodes.end())
	182	allCodes.push_back(*b);
	183	if (All == true)
	184	return allCodes;
	185	else
	186	return codes;
45df0ad2 DK	187	}
45df0ad2 DK	188
ab53c018 DK	189	// get the environment language codes: LC_MESSAGES (and later LANGUAGE)
	190	// we extract both, a long and a short code and then we will
	191	// check if we actually need both (rare) or if the short is enough
	192	string const envMsg = string(Locale == 0 ? std::setlocale(LC_MESSAGES, NULL) : *Locale);
	193	size_t const lenShort = (envMsg.find('_') != string::npos) ? envMsg.find('_') : 2;
	194	size_t const lenLong = (envMsg.find_first_of(".@") != string::npos) ? envMsg.find_first_of(".@") : (lenShort + 3);
	195
	196	string const envLong = envMsg.substr(0,lenLong);
	197	string const envShort = envLong.substr(0,lenShort);
	198
	199	// It is very likely we will need the environment codes later,
d7cf5923 DK	200	// so let us generate them now from LC_MESSAGES and LANGUAGE
d7cf5923 DK	201	std::vector<string> environment;
eb3947c6 DK	202	if (envShort != "C") {
eb3947c6 DK	203	// take care of LC_MESSAGES
ab53c018	204	if (envLong != envShort)
eb3947c6 DK	205	environment.push_back(envLong);
	206	environment.push_back(envShort);
	207	// take care of LANGUAGE
	208	const char *language_env = getenv("LANGUAGE") == 0 ? "" : getenv("LANGUAGE");
	209	string envLang = Locale == 0 ? language_env : *(Locale+1);
	210	if (envLang.empty() == false) {
	211	std::vector<string> env = VectorizeString(envLang,':');
	212	short addedLangs = 0; // add a maximum of 3 fallbacks from the environment
	213	for (std::vector<string>::const_iterator e = env.begin();
	214	e != env.end() && addedLangs < 3; ++e) {
	215	if (unlikely(e->empty() == true) \|\| *e == "en")
	216	continue;
	217	if (e == envLong \|\| e == envShort)
	218	continue;
	219	if (std::find(environment.begin(), environment.end(), *e) != environment.end())
d7cf5923	220	continue;
eb3947c6 DK	221	++addedLangs;
eb3947c6 DK	222	environment.push_back(*e);
d7cf5923	223	}
d7cf5923	224	}
eb3947c6 DK	225	} else {
eb3947c6 DK	226	environment.push_back("en");
d7cf5923 DK	227	}
d7cf5923 DK	228
da833832	229	// Support settings like Acquire::Languages=none on the command line to
45df0ad2 DK	230	// override the configuration settings vector of languages.
	231	string const forceLang = _config->Find("Acquire::Languages","");
	232	if (forceLang.empty() == false) {
	233	if (forceLang == "environment") {
d7cf5923	234	codes = environment;
45df0ad2 DK	235	} else if (forceLang != "none")
45df0ad2 DK	236	codes.push_back(forceLang);
7cb28948 DK	237	else //if (forceLang == "none")
7cb28948 DK	238	builtin.clear();
d7cf5923	239	allCodes = codes;
3f2d77b5 DK	240	for (std::vector<string>::const_iterator b = builtin.begin();
	241	b != builtin.end(); ++b)
	242	if (std::find(allCodes.begin(), allCodes.end(), *b) == allCodes.end())
	243	allCodes.push_back(*b);
	244	if (All == true)
	245	return allCodes;
	246	else
	247	return codes;
45df0ad2 DK	248	}
45df0ad2 DK	249
eb3947c6 DK	250	// cornercase: LANG=C, so we use only "en" Translation
	251	if (envShort == "C") {
	252	allCodes = codes = environment;
	253	allCodes.insert(allCodes.end(), builtin.begin(), builtin.end());
	254	if (All == true)
	255	return allCodes;
	256	else
	257	return codes;
	258	}
	259
45df0ad2 DK	260	std::vector<string> const lang = _config->FindVector("Acquire::Languages");
	261	// the default setting -> "environment, en"
	262	if (lang.empty() == true) {
d7cf5923	263	codes = environment;
45df0ad2 DK	264	if (envShort != "en")
45df0ad2 DK	265	codes.push_back("en");
d7cf5923	266	allCodes = codes;
3f2d77b5 DK	267	for (std::vector<string>::const_iterator b = builtin.begin();
	268	b != builtin.end(); ++b)
	269	if (std::find(allCodes.begin(), allCodes.end(), *b) == allCodes.end())
	270	allCodes.push_back(*b);
	271	if (All == true)
	272	return allCodes;
	273	else
	274	return codes;
45df0ad2 DK	275	}
	276
	277	// the configs define the order, so add the environment
	278	// then needed and ensure the codes are not listed twice.
	279	bool noneSeen = false;
	280	for (std::vector<string>::const_iterator l = lang.begin();
f7f0d6c7	281	l != lang.end(); ++l) {
45df0ad2	282	if (*l == "environment") {
d7cf5923 DK	283	for (std::vector<string>::const_iterator e = environment.begin();
	284	e != environment.end(); ++e) {
	285	if (std::find(allCodes.begin(), allCodes.end(), *e) != allCodes.end())
	286	continue;
45df0ad2	287	if (noneSeen == false)
d7cf5923 DK	288	codes.push_back(*e);
d7cf5923 DK	289	allCodes.push_back(*e);
45df0ad2 DK	290	}
	291	continue;
	292	} else if (*l == "none") {
	293	noneSeen = true;
	294	continue;
d7cf5923	295	} else if (std::find(allCodes.begin(), allCodes.end(), *l) != allCodes.end())
45df0ad2 DK	296	continue;
	297
	298	if (noneSeen == false)
	299	codes.push_back(*l);
	300	allCodes.push_back(*l);
	301	}
3f2d77b5 DK	302
	303	for (std::vector<string>::const_iterator b = builtin.begin();
	304	b != builtin.end(); ++b)
	305	if (std::find(allCodes.begin(), allCodes.end(), *b) == allCodes.end())
	306	allCodes.push_back(*b);
	307
45df0ad2 DK	308	if (All == true)
	309	return allCodes;
	310	else
	311	return codes;
	312	}
	313	/}}}/
5dd4c8b8 DK	314	// getArchitectures - Return Vector of prefered Architectures /{{{/
	315	std::vector<std::string> const Configuration::getArchitectures(bool const &Cached) {
	316	using std::string;
	317
	318	std::vector<string> static archs;
	319	if (likely(Cached == true) && archs.empty() == false)
	320	return archs;
	321
3152f4aa	322	string const arch = _config->Find("APT::Architecture");
8aec002f DK	323	archs = _config->FindVector("APT::Architectures");
8aec002f DK	324
3152f4aa DK	325	if (unlikely(arch.empty() == true))
	326	return archs;
	327
8aec002f DK	328	// FIXME: It is a bit unclean to have debian specific code here…
	329	if (archs.empty() == true) {
	330	archs.push_back(arch);
	331	string dpkgcall = _config->Find("Dir::Bin::dpkg", "dpkg");
	332	std::vector<string> const dpkgoptions = _config->FindVector("DPkg::options");
	333	for (std::vector<string>::const_iterator o = dpkgoptions.begin();
	334	o != dpkgoptions.end(); ++o)
	335	dpkgcall.append(" ").append(*o);
	336	dpkgcall.append(" --print-foreign-architectures 2> /dev/null");
	337	FILE *dpkg = popen(dpkgcall.c_str(), "r");
	338	char buf[1024];
	339	if(dpkg != NULL) {
	340	if (fgets(buf, sizeof(buf), dpkg) != NULL) {
	341	char* arch = strtok(buf, " ");
	342	while (arch != NULL) {
	343	for (; isspace(*arch) != 0; ++arch);
bdb3d92c	344	if (arch[0] != '\0') {
8aec002f DK	345	char const* archend = arch;
	346	for (; isspace(archend) == 0 && archend != '\0'; ++archend);
	347	archs.push_back(string(arch, (archend - arch)));
	348	}
	349	arch = strtok(NULL, " ");
	350	}
	351	}
	352	pclose(dpkg);
	353	}
	354	return archs;
	355	}
	356
5dd4c8b8 DK	357	if (archs.empty() == true \|\|
5dd4c8b8 DK	358	std::find(archs.begin(), archs.end(), arch) == archs.end())
bd9d81e3	359	archs.insert(archs.begin(), arch);
3152f4aa DK	360
	361	// erase duplicates and empty strings
	362	for (std::vector<string>::reverse_iterator a = archs.rbegin();
	363	a != archs.rend(); ++a) {
	364	if (a->empty() == true \|\| std::find(a + 1, archs.rend(), *a) != archs.rend())
	365	archs.erase(a.base()-1);
	366	if (a == archs.rend())
	367	break;
	368	}
	369
5dd4c8b8 DK	370	return archs;
	371	}
	372	/}}}/
	373	// checkArchitecture - are we interested in the given Architecture? /{{{/
	374	bool const Configuration::checkArchitecture(std::string const &Arch) {
	375	if (Arch == "all")
	376	return true;
	377	std::vector<std::string> const archs = getArchitectures(true);
	378	return (std::find(archs.begin(), archs.end(), Arch) != archs.end());
	379	}
	380	/}}}/
03bef784 DK	381	// setDefaultConfigurationForCompressors /{{{/
	382	void Configuration::setDefaultConfigurationForCompressors() {
	383	// Set default application paths to check for optional compression types
	384	_config->CndSet("Dir::Bin::lzma", "/usr/bin/lzma");
	385	_config->CndSet("Dir::Bin::xz", "/usr/bin/xz");
	386	_config->CndSet("Dir::Bin::bzip2", "/bin/bzip2");
	387	}
	388	/}}}/
	389	// getCompressors - Return Vector of usbale compressors /{{{/
	390	// ---------------------------------------------------------------------
	391	/* return a vector of compressors used by apt-ftparchive in the
	392	multicompress functionality or to detect data.tar files */
	393	std::vector<APT::Configuration::Compressor>
	394	const Configuration::getCompressors(bool const Cached) {
	395	static std::vector<APT::Configuration::Compressor> compressors;
	396	if (compressors.empty() == false) {
	397	if (Cached == true)
	398	return compressors;
	399	else
	400	compressors.clear();
	401	}
	402
	403	setDefaultConfigurationForCompressors();
	404
	405	compressors.push_back(Compressor(".", "", "", "", "", 1));
	406	if (_config->Exists("Dir::Bin::gzip") == false \|\| FileExists(_config->FindFile("Dir::Bin::gzip")) == true)
	407	compressors.push_back(Compressor("gzip",".gz","gzip","-9n","-d",2));
	408	if (_config->Exists("Dir::Bin::bzip2") == false \|\| FileExists(_config->FindFile("Dir::Bin::bzip2")) == true)
	409	compressors.push_back(Compressor("bzip2",".bz2","bzip2","-9","-d",3));
	410	if (_config->Exists("Dir::Bin::lzma") == false \|\| FileExists(_config->FindFile("Dir::Bin::lzma")) == true)
	411	compressors.push_back(Compressor("lzma",".lzma","lzma","-9","-d",4));
	412	if (_config->Exists("Dir::Bin::xz") == false \|\| FileExists(_config->FindFile("Dir::Bin::xz")) == true)
	413	compressors.push_back(Compressor("xz",".xz","xz","-6","-d",5));
	414
	415	std::vector<std::string> const comp = _config->FindVector("APT::Compressor");
	416	for (std::vector<std::string>::const_iterator c = comp.begin();
	417	c != comp.end(); ++c) {
	418	if (c == "." \|\| c == "gzip" \|\| c == "bzip2" \|\| c == "lzma" \|\| *c == "xz")
	419	continue;
	420	compressors.push_back(Compressor(c->c_str(), std::string(".").append(*c).c_str(), c->c_str(), "-9", "-d", 100));
	421	}
	422
	423	return compressors;
	424	}
	425	/}}}/
b0e1a43f DK	426	// getCompressorExtensions - supported data.tar extensions /{{{/
	427	// ---------------------------------------------------------------------
	428	/* */
	429	std::vector<std::string> const Configuration::getCompressorExtensions() {
	430	std::vector<APT::Configuration::Compressor> const compressors = getCompressors();
	431	std::vector<std::string> ext;
	432	for (std::vector<APT::Configuration::Compressor>::const_iterator c = compressors.begin();
	433	c != compressors.end(); ++c)
	434	if (c->Extension.empty() == false && c->Extension != ".")
	435	ext.push_back(c->Extension);
	436	return ext;
	437	}
	438	/}}}/
03bef784 DK	439	// Compressor constructor /{{{/
	440	// ---------------------------------------------------------------------
	441	/* */
	442	Configuration::Compressor::Compressor(char const name, char const extension,
	443	char const *binary,
	444	char const compressArg, char const uncompressArg,
	445	unsigned short const cost) {
8f3ba4e8	446	std::string const config = std::string("APT:Compressor::").append(name).append("::");
03bef784 DK	447	Name = _config->Find(std::string(config).append("Name"), name);
	448	Extension = _config->Find(std::string(config).append("Extension"), extension);
	449	Binary = _config->Find(std::string(config).append("Binary"), binary);
	450	Cost = _config->FindI(std::string(config).append("Cost"), cost);
	451	std::string const compConf = std::string(config).append("CompressArg");
	452	if (_config->Exists(compConf) == true)
	453	CompressArgs = _config->FindVector(compConf);
	454	else if (compressArg != NULL)
	455	CompressArgs.push_back(compressArg);
	456	std::string const uncompConf = std::string(config).append("UncompressArg");
	457	if (_config->Exists(uncompConf) == true)
	458	UncompressArgs = _config->FindVector(uncompConf);
	459	else if (uncompressArg != NULL)
	460	UncompressArgs.push_back(uncompressArg);
	461	}
	462	/}}}/
e878aedb	463	}