merge documentation of the EDSP protocol
[ntk/apt.git] / apt-pkg / aptconfiguration.cc
index 2acf8dd..14ee09e 100644 (file)
 // 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>
@@ -37,12 +39,11 @@ const Configuration::getCompressionTypes(bool const &Cached) {
 
        // 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");
 
-       // Set default application paths to check for optional compression types
-       _config->CndSet("Dir::Bin::lzma", "/usr/bin/lzma");
-       _config->CndSet("Dir::Bin::bzip2", "/bin/bzip2");
+       setDefaultConfigurationForCompressors();
 
        // accept non-list order as override setting for config settings on commandline
        std::string const overrideOrder = _config->Find("Acquire::CompressionTypes::Order","");
@@ -89,6 +90,14 @@ const Configuration::getCompressionTypes(bool const &Cached) {
                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;
 }
                                                                        /*}}}*/
@@ -154,48 +163,13 @@ std::vector<std::string> const Configuration::getLanguages(bool const &All,
        }
        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;
-
-       // first cornercase: LANG=C, so we use only "en" Translation
-       if (envLong == "C") {
-               codes.push_back("en");
-               allCodes = codes;
-               allCodes.insert(allCodes.end(), builtin.begin(), builtin.end());
-               if (All == true)
-                       return allCodes;
-               else
-                       return codes;
-       }
-
-       // 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");
@@ -210,40 +184,44 @@ std::vector<std::string> const Configuration::getLanguages(bool const &All,
                        return codes;
        }
 
-       // It is very likely we will need to environment codes later,
+       // 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;
-       // 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)
+       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);
                        }
-                       ++addedLangs;
-                       environment.push_back(*e);
                }
+       } else {
+               environment.push_back("en");
        }
 
        // Support settings like Acquire::Translation=none on the command line to
@@ -265,6 +243,16 @@ std::vector<std::string> const Configuration::getLanguages(bool const &All,
                        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) {
@@ -329,9 +317,52 @@ std::vector<std::string> const Configuration::getArchitectures(bool const &Cache
 
        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;
 }
                                                                        /*}}}*/
@@ -343,4 +374,86 @@ bool const Configuration::checkArchitecture(std::string const &Arch) {
        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);
+}
+                                                                       /*}}}*/
 }