| 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 /*{{{*/ |
| 11 | #include <apt-pkg/aptconfiguration.h> |
| 12 | #include <apt-pkg/configuration.h> |
| 13 | #include <apt-pkg/fileutl.h> |
| 14 | #include <apt-pkg/macros.h> |
| 15 | #include <apt-pkg/strutl.h> |
| 16 | |
| 17 | #include <sys/types.h> |
| 18 | #include <dirent.h> |
| 19 | |
| 20 | #include <algorithm> |
| 21 | #include <string> |
| 22 | #include <vector> |
| 23 | /*}}}*/ |
| 24 | namespace APT { |
| 25 | // getCompressionTypes - Return Vector of usbale compressiontypes /*{{{*/ |
| 26 | // --------------------------------------------------------------------- |
| 27 | /* return a vector of compression types in the prefered order. */ |
| 28 | std::vector<std::string> |
| 29 | const Configuration::getCompressionTypes(bool const &Cached) { |
| 30 | static std::vector<std::string> types; |
| 31 | if (types.empty() == false) { |
| 32 | if (Cached == true) |
| 33 | return types; |
| 34 | else |
| 35 | types.clear(); |
| 36 | } |
| 37 | |
| 38 | // setup the defaults for the compressiontypes => method mapping |
| 39 | _config->CndSet("Acquire::CompressionTypes::bz2","bzip2"); |
| 40 | _config->CndSet("Acquire::CompressionTypes::lzma","lzma"); |
| 41 | _config->CndSet("Acquire::CompressionTypes::gz","gzip"); |
| 42 | |
| 43 | // Set default application paths to check for optional compression types |
| 44 | _config->CndSet("Dir::Bin::lzma", "/usr/bin/lzma"); |
| 45 | _config->CndSet("Dir::Bin::bzip2", "/bin/bzip2"); |
| 46 | |
| 47 | // accept non-list order as override setting for config settings on commandline |
| 48 | std::string const overrideOrder = _config->Find("Acquire::CompressionTypes::Order",""); |
| 49 | if (overrideOrder.empty() == false) |
| 50 | types.push_back(overrideOrder); |
| 51 | |
| 52 | // load the order setting into our vector |
| 53 | std::vector<std::string> const order = _config->FindVector("Acquire::CompressionTypes::Order"); |
| 54 | for (std::vector<std::string>::const_iterator o = order.begin(); |
| 55 | o != order.end(); o++) { |
| 56 | if ((*o).empty() == true) |
| 57 | continue; |
| 58 | // ignore types we have no method ready to use |
| 59 | if (_config->Exists(string("Acquire::CompressionTypes::").append(*o)) == false) |
| 60 | continue; |
| 61 | // ignore types we have no app ready to use |
| 62 | string const appsetting = string("Dir::Bin::").append(*o); |
| 63 | if (_config->Exists(appsetting) == true) { |
| 64 | std::string const app = _config->FindFile(appsetting.c_str(), ""); |
| 65 | if (app.empty() == false && FileExists(app) == false) |
| 66 | continue; |
| 67 | } |
| 68 | types.push_back(*o); |
| 69 | } |
| 70 | |
| 71 | // move again over the option tree to add all missing compression types |
| 72 | ::Configuration::Item const *Types = _config->Tree("Acquire::CompressionTypes"); |
| 73 | if (Types != 0) |
| 74 | Types = Types->Child; |
| 75 | |
| 76 | for (; Types != 0; Types = Types->Next) { |
| 77 | if (Types->Tag == "Order" || Types->Tag.empty() == true) |
| 78 | continue; |
| 79 | // ignore types we already have in the vector |
| 80 | if (std::find(types.begin(),types.end(),Types->Tag) != types.end()) |
| 81 | continue; |
| 82 | // ignore types we have no app ready to use |
| 83 | string const appsetting = string("Dir::Bin::").append(Types->Value); |
| 84 | if (appsetting.empty() == false && _config->Exists(appsetting) == true) { |
| 85 | std::string const app = _config->FindFile(appsetting.c_str(), ""); |
| 86 | if (app.empty() == false && FileExists(app) == false) |
| 87 | continue; |
| 88 | } |
| 89 | types.push_back(Types->Tag); |
| 90 | } |
| 91 | |
| 92 | return types; |
| 93 | } |
| 94 | /*}}}*/ |
| 95 | // GetLanguages - Return Vector of Language Codes /*{{{*/ |
| 96 | // --------------------------------------------------------------------- |
| 97 | /* return a vector of language codes in the prefered order. |
| 98 | the special word "environment" will be replaced with the long and the short |
| 99 | code of the local settings and it will be insured that this will not add |
| 100 | duplicates. So in an german local the setting "environment, de_DE, en, de" |
| 101 | will result in "de_DE, de, en". |
| 102 | The special word "none" is the stopcode for the not-All code vector */ |
| 103 | std::vector<std::string> const Configuration::getLanguages(bool const &All, |
| 104 | bool const &Cached, char const ** const Locale) { |
| 105 | using std::string; |
| 106 | |
| 107 | // The detection is boring and has a lot of cornercases, |
| 108 | // so we cache the results to calculated it only once. |
| 109 | std::vector<string> static allCodes; |
| 110 | std::vector<string> static codes; |
| 111 | |
| 112 | // we have something in the cache |
| 113 | if (codes.empty() == false || allCodes.empty() == false) { |
| 114 | if (Cached == true) { |
| 115 | if(All == true && allCodes.empty() == false) |
| 116 | return allCodes; |
| 117 | else |
| 118 | return codes; |
| 119 | } else { |
| 120 | allCodes.clear(); |
| 121 | codes.clear(); |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | // Include all Language codes we have a Translation file for in /var/lib/apt/lists |
| 126 | // so they will be all included in the Cache. |
| 127 | std::vector<string> builtin; |
| 128 | DIR *D = opendir(_config->FindDir("Dir::State::lists").c_str()); |
| 129 | if (D != 0) { |
| 130 | builtin.push_back("none"); |
| 131 | for (struct dirent *Ent = readdir(D); Ent != 0; Ent = readdir(D)) { |
| 132 | string const name = Ent->d_name; |
| 133 | size_t const foundDash = name.rfind("-"); |
| 134 | size_t const foundUnderscore = name.rfind("_"); |
| 135 | if (foundDash == string::npos || foundUnderscore == string::npos || |
| 136 | foundDash <= foundUnderscore || |
| 137 | name.substr(foundUnderscore+1, foundDash-(foundUnderscore+1)) != "Translation") |
| 138 | continue; |
| 139 | string const c = name.substr(foundDash+1); |
| 140 | if (unlikely(c.empty() == true) || c == "en") |
| 141 | continue; |
| 142 | // Skip unusual files, like backups or that alike |
| 143 | string::const_iterator s = c.begin(); |
| 144 | for (;s != c.end(); ++s) { |
| 145 | if (isalpha(*s) == 0) |
| 146 | break; |
| 147 | } |
| 148 | if (s != c.end()) |
| 149 | continue; |
| 150 | if (std::find(builtin.begin(), builtin.end(), c) != builtin.end()) |
| 151 | continue; |
| 152 | builtin.push_back(c); |
| 153 | } |
| 154 | } |
| 155 | |
| 156 | // get the environment language codes: LC_MESSAGES (and later LANGUAGE) |
| 157 | // we extract both, a long and a short code and then we will |
| 158 | // check if we actually need both (rare) or if the short is enough |
| 159 | string const envMsg = string(Locale == 0 ? std::setlocale(LC_MESSAGES, NULL) : *Locale); |
| 160 | size_t const lenShort = (envMsg.find('_') != string::npos) ? envMsg.find('_') : 2; |
| 161 | size_t const lenLong = (envMsg.find_first_of(".@") != string::npos) ? envMsg.find_first_of(".@") : (lenShort + 3); |
| 162 | |
| 163 | string envLong = envMsg.substr(0,lenLong); |
| 164 | string const envShort = envLong.substr(0,lenShort); |
| 165 | bool envLongIncluded = true; |
| 166 | |
| 167 | // first cornercase: LANG=C, so we use only "en" Translation |
| 168 | if (envLong == "C") { |
| 169 | codes.push_back("en"); |
| 170 | allCodes = codes; |
| 171 | allCodes.insert(allCodes.end(), builtin.begin(), builtin.end()); |
| 172 | if (All == true) |
| 173 | return allCodes; |
| 174 | else |
| 175 | return codes; |
| 176 | } |
| 177 | |
| 178 | // to save the servers from unneeded queries, we only try also long codes |
| 179 | // for languages it is realistic to have a long code translation fileā¦ |
| 180 | // TODO: Improve translation acquire system to drop them dynamic |
| 181 | char const *needLong[] = { "cs", "en", "pt", "sv", "zh", NULL }; |
| 182 | if (envLong != envShort) { |
| 183 | for (char const **l = needLong; *l != NULL; l++) |
| 184 | if (envShort.compare(*l) == 0) { |
| 185 | envLongIncluded = false; |
| 186 | break; |
| 187 | } |
| 188 | } |
| 189 | |
| 190 | // we don't add the long code, but we allow the user to do so |
| 191 | if (envLongIncluded == true) |
| 192 | envLong.clear(); |
| 193 | |
| 194 | // FIXME: Remove support for the old APT::Acquire::Translation |
| 195 | // it was undocumented and so it should be not very widthly used |
| 196 | string const oldAcquire = _config->Find("APT::Acquire::Translation",""); |
| 197 | if (oldAcquire.empty() == false && oldAcquire != "environment") { |
| 198 | if (oldAcquire != "none") |
| 199 | codes.push_back(oldAcquire); |
| 200 | codes.push_back("en"); |
| 201 | allCodes = codes; |
| 202 | for (std::vector<string>::const_iterator b = builtin.begin(); |
| 203 | b != builtin.end(); ++b) |
| 204 | if (std::find(allCodes.begin(), allCodes.end(), *b) == allCodes.end()) |
| 205 | allCodes.push_back(*b); |
| 206 | if (All == true) |
| 207 | return allCodes; |
| 208 | else |
| 209 | return codes; |
| 210 | } |
| 211 | |
| 212 | // It is very likely we will need to environment codes later, |
| 213 | // so let us generate them now from LC_MESSAGES and LANGUAGE |
| 214 | std::vector<string> environment; |
| 215 | // take care of LC_MESSAGES |
| 216 | if (envLongIncluded == false) |
| 217 | environment.push_back(envLong); |
| 218 | environment.push_back(envShort); |
| 219 | // take care of LANGUAGE |
| 220 | const char *language_env = getenv("LANGUAGE") == 0 ? "" : getenv("LANGUAGE"); |
| 221 | string envLang = Locale == 0 ? language_env : *(Locale+1); |
| 222 | if (envLang.empty() == false) { |
| 223 | std::vector<string> env = ExplodeString(envLang,':'); |
| 224 | short addedLangs = 0; // add a maximum of 3 fallbacks from the environment |
| 225 | for (std::vector<string>::const_iterator e = env.begin(); |
| 226 | e != env.end() && addedLangs < 3; ++e) { |
| 227 | if (unlikely(e->empty() == true) || *e == "en") |
| 228 | continue; |
| 229 | if (*e == envLong || *e == envShort) |
| 230 | continue; |
| 231 | if (std::find(environment.begin(), environment.end(), *e) != environment.end()) |
| 232 | continue; |
| 233 | if (e->find('_') != string::npos) { |
| 234 | // Drop LongCodes here - ShortCodes are also included |
| 235 | string const shorty = e->substr(0, e->find('_')); |
| 236 | char const **n = needLong; |
| 237 | for (; *n != NULL; ++n) |
| 238 | if (shorty == *n) |
| 239 | break; |
| 240 | if (*n == NULL) |
| 241 | continue; |
| 242 | } |
| 243 | ++addedLangs; |
| 244 | environment.push_back(*e); |
| 245 | } |
| 246 | } |
| 247 | |
| 248 | // Support settings like Acquire::Translation=none on the command line to |
| 249 | // override the configuration settings vector of languages. |
| 250 | string const forceLang = _config->Find("Acquire::Languages",""); |
| 251 | if (forceLang.empty() == false) { |
| 252 | if (forceLang == "environment") { |
| 253 | codes = environment; |
| 254 | } else if (forceLang != "none") |
| 255 | codes.push_back(forceLang); |
| 256 | allCodes = codes; |
| 257 | for (std::vector<string>::const_iterator b = builtin.begin(); |
| 258 | b != builtin.end(); ++b) |
| 259 | if (std::find(allCodes.begin(), allCodes.end(), *b) == allCodes.end()) |
| 260 | allCodes.push_back(*b); |
| 261 | if (All == true) |
| 262 | return allCodes; |
| 263 | else |
| 264 | return codes; |
| 265 | } |
| 266 | |
| 267 | std::vector<string> const lang = _config->FindVector("Acquire::Languages"); |
| 268 | // the default setting -> "environment, en" |
| 269 | if (lang.empty() == true) { |
| 270 | codes = environment; |
| 271 | if (envShort != "en") |
| 272 | codes.push_back("en"); |
| 273 | allCodes = codes; |
| 274 | for (std::vector<string>::const_iterator b = builtin.begin(); |
| 275 | b != builtin.end(); ++b) |
| 276 | if (std::find(allCodes.begin(), allCodes.end(), *b) == allCodes.end()) |
| 277 | allCodes.push_back(*b); |
| 278 | if (All == true) |
| 279 | return allCodes; |
| 280 | else |
| 281 | return codes; |
| 282 | } |
| 283 | |
| 284 | // the configs define the order, so add the environment |
| 285 | // then needed and ensure the codes are not listed twice. |
| 286 | bool noneSeen = false; |
| 287 | for (std::vector<string>::const_iterator l = lang.begin(); |
| 288 | l != lang.end(); l++) { |
| 289 | if (*l == "environment") { |
| 290 | for (std::vector<string>::const_iterator e = environment.begin(); |
| 291 | e != environment.end(); ++e) { |
| 292 | if (std::find(allCodes.begin(), allCodes.end(), *e) != allCodes.end()) |
| 293 | continue; |
| 294 | if (noneSeen == false) |
| 295 | codes.push_back(*e); |
| 296 | allCodes.push_back(*e); |
| 297 | } |
| 298 | continue; |
| 299 | } else if (*l == "none") { |
| 300 | noneSeen = true; |
| 301 | continue; |
| 302 | } else if (std::find(allCodes.begin(), allCodes.end(), *l) != allCodes.end()) |
| 303 | continue; |
| 304 | |
| 305 | if (noneSeen == false) |
| 306 | codes.push_back(*l); |
| 307 | allCodes.push_back(*l); |
| 308 | } |
| 309 | |
| 310 | for (std::vector<string>::const_iterator b = builtin.begin(); |
| 311 | b != builtin.end(); ++b) |
| 312 | if (std::find(allCodes.begin(), allCodes.end(), *b) == allCodes.end()) |
| 313 | allCodes.push_back(*b); |
| 314 | |
| 315 | if (All == true) |
| 316 | return allCodes; |
| 317 | else |
| 318 | return codes; |
| 319 | } |
| 320 | /*}}}*/ |
| 321 | } |