+// 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);
+
+ // 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 envLong = envMsg.substr(0,lenLong);
+ string const envShort = envLong.substr(0,lenShort);
+ bool envLongIncluded = true;
+
+ // to save the servers from unneeded queries, we only try also long codes
+ // for languages it is realistic to have a long code translation file…
+ // TODO: Improve translation acquire system to drop them dynamic
+ char const *needLong[] = { "cs", "en", "pt", "sv", "zh", NULL };
+ if (envLong != envShort) {
+ for (char const **l = needLong; *l != NULL; l++)
+ if (envShort.compare(*l) == 0) {
+ envLongIncluded = false;
+ break;
+ }
+ }
+
+ // we don't add the long code, but we allow the user to do so
+ if (envLongIncluded == true)
+ envLong.clear();
+
+ // 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;
+ }
+
+ // It is very likely we will need to 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 (envLongIncluded == false)
+ 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;
+ if (e->find('_') != string::npos) {
+ // Drop LongCodes here - ShortCodes are also included
+ string const shorty = e->substr(0, e->find('_'));
+ char const **n = needLong;
+ for (; *n != NULL; ++n)
+ if (shorty == *n)
+ break;
+ if (*n == NULL)
+ 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;
+
+ archs = _config->FindVector("APT::Architectures");
+ string const arch = _config->Find("APT::Architecture");
+ if (unlikely(arch.empty() == true))
+ 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());
+}
+ /*}}}*/
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