[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 <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(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);
	}

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