[ntk/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("_");
			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::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);
		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("-");
	145	size_t const foundUnderscore = name.rfind("_");
	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) {
	156	if (isalpha(*s) == 0)
	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);
d7cf5923	237	allCodes = codes;
3f2d77b5 DK	238	for (std::vector<string>::const_iterator b = builtin.begin();
	239	b != builtin.end(); ++b)
	240	if (std::find(allCodes.begin(), allCodes.end(), *b) == allCodes.end())
	241	allCodes.push_back(*b);
	242	if (All == true)
	243	return allCodes;
	244	else
	245	return codes;
45df0ad2 DK	246	}
45df0ad2 DK	247
eb3947c6 DK	248	// cornercase: LANG=C, so we use only "en" Translation
	249	if (envShort == "C") {
	250	allCodes = codes = environment;
	251	allCodes.insert(allCodes.end(), builtin.begin(), builtin.end());
	252	if (All == true)
	253	return allCodes;
	254	else
	255	return codes;
	256	}
	257
45df0ad2 DK	258	std::vector<string> const lang = _config->FindVector("Acquire::Languages");
	259	// the default setting -> "environment, en"
	260	if (lang.empty() == true) {
d7cf5923	261	codes = environment;
45df0ad2 DK	262	if (envShort != "en")
45df0ad2 DK	263	codes.push_back("en");
d7cf5923	264	allCodes = codes;
3f2d77b5 DK	265	for (std::vector<string>::const_iterator b = builtin.begin();
	266	b != builtin.end(); ++b)
	267	if (std::find(allCodes.begin(), allCodes.end(), *b) == allCodes.end())
	268	allCodes.push_back(*b);
	269	if (All == true)
	270	return allCodes;
	271	else
	272	return codes;
45df0ad2 DK	273	}
	274
	275	// the configs define the order, so add the environment
	276	// then needed and ensure the codes are not listed twice.
	277	bool noneSeen = false;
	278	for (std::vector<string>::const_iterator l = lang.begin();
f7f0d6c7	279	l != lang.end(); ++l) {
45df0ad2	280	if (*l == "environment") {
d7cf5923 DK	281	for (std::vector<string>::const_iterator e = environment.begin();
	282	e != environment.end(); ++e) {
	283	if (std::find(allCodes.begin(), allCodes.end(), *e) != allCodes.end())
	284	continue;
45df0ad2	285	if (noneSeen == false)
d7cf5923 DK	286	codes.push_back(*e);
d7cf5923 DK	287	allCodes.push_back(*e);
45df0ad2 DK	288	}
	289	continue;
	290	} else if (*l == "none") {
	291	noneSeen = true;
	292	continue;
d7cf5923	293	} else if (std::find(allCodes.begin(), allCodes.end(), *l) != allCodes.end())
45df0ad2 DK	294	continue;
	295
	296	if (noneSeen == false)
	297	codes.push_back(*l);
	298	allCodes.push_back(*l);
	299	}
3f2d77b5 DK	300
	301	for (std::vector<string>::const_iterator b = builtin.begin();
	302	b != builtin.end(); ++b)
	303	if (std::find(allCodes.begin(), allCodes.end(), *b) == allCodes.end())
	304	allCodes.push_back(*b);
	305
45df0ad2 DK	306	if (All == true)
	307	return allCodes;
	308	else
	309	return codes;
	310	}
	311	/}}}/
5dd4c8b8 DK	312	// getArchitectures - Return Vector of prefered Architectures /{{{/
	313	std::vector<std::string> const Configuration::getArchitectures(bool const &Cached) {
	314	using std::string;
	315
	316	std::vector<string> static archs;
	317	if (likely(Cached == true) && archs.empty() == false)
	318	return archs;
	319
3152f4aa	320	string const arch = _config->Find("APT::Architecture");
8aec002f DK	321	archs = _config->FindVector("APT::Architectures");
8aec002f DK	322
3152f4aa DK	323	if (unlikely(arch.empty() == true))
	324	return archs;
	325
8aec002f DK	326	// FIXME: It is a bit unclean to have debian specific code here…
	327	if (archs.empty() == true) {
	328	archs.push_back(arch);
	329	string dpkgcall = _config->Find("Dir::Bin::dpkg", "dpkg");
	330	std::vector<string> const dpkgoptions = _config->FindVector("DPkg::options");
	331	for (std::vector<string>::const_iterator o = dpkgoptions.begin();
	332	o != dpkgoptions.end(); ++o)
	333	dpkgcall.append(" ").append(*o);
	334	dpkgcall.append(" --print-foreign-architectures 2> /dev/null");
	335	FILE *dpkg = popen(dpkgcall.c_str(), "r");
	336	char buf[1024];
	337	if(dpkg != NULL) {
	338	if (fgets(buf, sizeof(buf), dpkg) != NULL) {
	339	char* arch = strtok(buf, " ");
	340	while (arch != NULL) {
	341	for (; isspace(*arch) != 0; ++arch);
bdb3d92c	342	if (arch[0] != '\0') {
8aec002f DK	343	char const* archend = arch;
	344	for (; isspace(archend) == 0 && archend != '\0'; ++archend);
	345	archs.push_back(string(arch, (archend - arch)));
	346	}
	347	arch = strtok(NULL, " ");
	348	}
	349	}
	350	pclose(dpkg);
	351	}
	352	return archs;
	353	}
	354
5dd4c8b8 DK	355	if (archs.empty() == true \|\|
5dd4c8b8 DK	356	std::find(archs.begin(), archs.end(), arch) == archs.end())
bd9d81e3	357	archs.insert(archs.begin(), arch);
3152f4aa DK	358
	359	// erase duplicates and empty strings
	360	for (std::vector<string>::reverse_iterator a = archs.rbegin();
	361	a != archs.rend(); ++a) {
	362	if (a->empty() == true \|\| std::find(a + 1, archs.rend(), *a) != archs.rend())
	363	archs.erase(a.base()-1);
	364	if (a == archs.rend())
	365	break;
	366	}
	367
5dd4c8b8 DK	368	return archs;
	369	}
	370	/}}}/
	371	// checkArchitecture - are we interested in the given Architecture? /{{{/
	372	bool const Configuration::checkArchitecture(std::string const &Arch) {
	373	if (Arch == "all")
	374	return true;
	375	std::vector<std::string> const archs = getArchitectures(true);
	376	return (std::find(archs.begin(), archs.end(), Arch) != archs.end());
	377	}
	378	/}}}/
03bef784 DK	379	// setDefaultConfigurationForCompressors /{{{/
	380	void Configuration::setDefaultConfigurationForCompressors() {
	381	// Set default application paths to check for optional compression types
	382	_config->CndSet("Dir::Bin::lzma", "/usr/bin/lzma");
	383	_config->CndSet("Dir::Bin::xz", "/usr/bin/xz");
	384	_config->CndSet("Dir::Bin::bzip2", "/bin/bzip2");
	385	}
	386	/}}}/
	387	// getCompressors - Return Vector of usbale compressors /{{{/
	388	// ---------------------------------------------------------------------
	389	/* return a vector of compressors used by apt-ftparchive in the
	390	multicompress functionality or to detect data.tar files */
	391	std::vector<APT::Configuration::Compressor>
	392	const Configuration::getCompressors(bool const Cached) {
	393	static std::vector<APT::Configuration::Compressor> compressors;
	394	if (compressors.empty() == false) {
	395	if (Cached == true)
	396	return compressors;
	397	else
	398	compressors.clear();
	399	}
	400
	401	setDefaultConfigurationForCompressors();
	402
	403	compressors.push_back(Compressor(".", "", "", "", "", 1));
	404	if (_config->Exists("Dir::Bin::gzip") == false \|\| FileExists(_config->FindFile("Dir::Bin::gzip")) == true)
	405	compressors.push_back(Compressor("gzip",".gz","gzip","-9n","-d",2));
	406	if (_config->Exists("Dir::Bin::bzip2") == false \|\| FileExists(_config->FindFile("Dir::Bin::bzip2")) == true)
	407	compressors.push_back(Compressor("bzip2",".bz2","bzip2","-9","-d",3));
	408	if (_config->Exists("Dir::Bin::lzma") == false \|\| FileExists(_config->FindFile("Dir::Bin::lzma")) == true)
	409	compressors.push_back(Compressor("lzma",".lzma","lzma","-9","-d",4));
	410	if (_config->Exists("Dir::Bin::xz") == false \|\| FileExists(_config->FindFile("Dir::Bin::xz")) == true)
	411	compressors.push_back(Compressor("xz",".xz","xz","-6","-d",5));
	412
	413	std::vector<std::string> const comp = _config->FindVector("APT::Compressor");
	414	for (std::vector<std::string>::const_iterator c = comp.begin();
	415	c != comp.end(); ++c) {
	416	if (c == "." \|\| c == "gzip" \|\| c == "bzip2" \|\| c == "lzma" \|\| *c == "xz")
	417	continue;
	418	compressors.push_back(Compressor(c->c_str(), std::string(".").append(*c).c_str(), c->c_str(), "-9", "-d", 100));
	419	}
	420
	421	return compressors;
	422	}
	423	/}}}/
b0e1a43f DK	424	// getCompressorExtensions - supported data.tar extensions /{{{/
	425	// ---------------------------------------------------------------------
	426	/* */
	427	std::vector<std::string> const Configuration::getCompressorExtensions() {
	428	std::vector<APT::Configuration::Compressor> const compressors = getCompressors();
	429	std::vector<std::string> ext;
	430	for (std::vector<APT::Configuration::Compressor>::const_iterator c = compressors.begin();
	431	c != compressors.end(); ++c)
	432	if (c->Extension.empty() == false && c->Extension != ".")
	433	ext.push_back(c->Extension);
	434	return ext;
	435	}
	436	/}}}/
03bef784 DK	437	// Compressor constructor /{{{/
	438	// ---------------------------------------------------------------------
	439	/* */
	440	Configuration::Compressor::Compressor(char const name, char const extension,
	441	char const *binary,
	442	char const compressArg, char const uncompressArg,
	443	unsigned short const cost) {
8f3ba4e8	444	std::string const config = std::string("APT:Compressor::").append(name).append("::");
03bef784 DK	445	Name = _config->Find(std::string(config).append("Name"), name);
	446	Extension = _config->Find(std::string(config).append("Extension"), extension);
	447	Binary = _config->Find(std::string(config).append("Binary"), binary);
	448	Cost = _config->FindI(std::string(config).append("Cost"), cost);
	449	std::string const compConf = std::string(config).append("CompressArg");
	450	if (_config->Exists(compConf) == true)
	451	CompressArgs = _config->FindVector(compConf);
	452	else if (compressArg != NULL)
	453	CompressArgs.push_back(compressArg);
	454	std::string const uncompConf = std::string(config).append("UncompressArg");
	455	if (_config->Exists(uncompConf) == true)
	456	UncompressArgs = _config->FindVector(uncompConf);
	457	else if (uncompressArg != NULL)
	458	UncompressArgs.push_back(uncompressArg);
	459	}
	460	/}}}/
e878aedb	461	}