more explicit MarkRequired algorithm code

[apt.git] / cmdline / apt-helper.cc

diff --git a/cmdline/apt-helper.cc b/cmdline/apt-helper.cc
index be6c2881a70a45626fdddc3e80c62783f7e4e957..fd99fba8bb868ee87201c343cd0a1f59709e1ed2 100644 (file)
--- a/cmdline/apt-helper.cc
+++ b/cmdline/apt-helper.cc
@@ -29,6 +29,8 @@
 #include <string>
 #include <vector>
 
+#include <stdlib.h>
+
 #include <apti18n.h>
                                                                        /*}}}*/
 
@@ -37,7 +39,8 @@ static bool DoAutoDetectProxy(CommandLine &CmdL)                      /*{{{*/
    if (CmdL.FileSize() != 2)
       return _error->Error(_("Need one URL as argument"));
    URI ServerURL(CmdL.FileList[1]);
-   AutoDetectProxy(ServerURL);
+   if (AutoDetectProxy(ServerURL) == false)
+      return false;
    std::string SpecificProxy = _config->Find("Acquire::"+ServerURL.Access+"::Proxy::" + ServerURL.Host);
    ioprintf(std::cout, "Using proxy '%s' for URL '%s'\n",
             SpecificProxy.c_str(), std::string(ServerURL).c_str());
@@ -100,30 +103,96 @@ static bool DoSrvLookup(CommandLine &CmdL)                                /*{{{*/
         _error->Error(_("GetSrvRec failed for %s"), name.c_str());
 
       for (SrvRec const &I : srv_records)
-        c1out << I.target << "\t" << I.priority << "\t" << I.weight << "\t" << I.port << std::endl;
+        ioprintf(c1out, "%s\t%d\t%d\t%d\n", I.target.c_str(), I.priority, I.weight, I.port);
+   }
+   return true;
+}
+                                                                       /*}}}*/
+static const APT::Configuration::Compressor *FindCompressor(std::vector<APT::Configuration::Compressor> const & compressors, std::string name)                         /*{{{*/
+{
+   APT::Configuration::Compressor const * compressor = NULL;
+   for (auto const & c : compressors)
+   {
+      if (compressor != NULL && c.Cost >= compressor->Cost)
+         continue;
+      if (c.Name == name || c.Extension == name || (!c.Extension.empty() && c.Extension.substr(1) == name))
+         compressor = &c;
+   }
+
+   return compressor;
+}
+                                                                       /*}}}*/
+static bool DoCatFile(CommandLine &CmdL)                               /*{{{*/
+{
+   FileFd fd;
+   FileFd out;
+   std::string const compressorName = _config->Find("Apt-Helper::Cat-File::Compress", "");
+
+   if (compressorName.empty() == false)
+   {
+
+      auto const compressors = APT::Configuration::getCompressors();
+      auto const compressor = FindCompressor(compressors, compressorName);
+
+      if (compressor == NULL)
+         return _error->Error("Could not find compressor: %s", compressorName.c_str());
+
+      if (out.OpenDescriptor(STDOUT_FILENO, FileFd::WriteOnly, *compressor) == false)
+         return false;
+   } else
+   {
+      if (out.OpenDescriptor(STDOUT_FILENO, FileFd::WriteOnly) == false)
+         return false;
+   }
+
+   if (CmdL.FileSize() <= 1)
+   {
+      if (fd.OpenDescriptor(STDIN_FILENO, FileFd::ReadOnly) == false)
+        return false;
+      if (CopyFile(fd, out) == false)
+         return false;
+      return true;
+   }
+
+   for(size_t i = 1; CmdL.FileList[i] != NULL; ++i)
+   {
+      std::string const name = CmdL.FileList[i];
+
+      if (name != "-")
+      {
+        if (fd.Open(name, FileFd::ReadOnly, FileFd::Extension) == false)
+           return false;
+      }
+      else
+      {
+        if (fd.OpenDescriptor(STDIN_FILENO, FileFd::ReadOnly) == false)
+           return false;
+      }
+
+      if (CopyFile(fd, out) == false)
+         return false;
    }
    return true;
 }
                                                                        /*}}}*/
-bool ShowHelp(CommandLine &, aptDispatchWithHelp const  * Cmds)                /*{{{*/
+static bool ShowHelp(CommandLine &)                                    /*{{{*/
 {
    std::cout <<
-    _("Usage: apt-helper [options] command\n"
-      "       apt-helper [options] download-file uri target-path\n"
-      "\n"
-      "apt-helper is a internal helper for apt\n")
-    << std::endl;
-   ShowHelpListCommands(Cmds);
-   std::cout << std::endl <<
-      _("This APT helper has Super Meep Powers.") << std::endl;
+      _("Usage: apt-helper [options] command\n"
+           "       apt-helper [options] cat-file file ...\n"
+           "       apt-helper [options] download-file uri target-path\n"
+           "\n"
+           "apt-helper bundles a variety of commands for shell scripts to use\n"
+           "e.g. the same proxy configuration or acquire system as APT would.\n");
    return true;
 }
                                                                        /*}}}*/
-std::vector<aptDispatchWithHelp> GetCommands()                         /*{{{*/
+static std::vector<aptDispatchWithHelp> GetCommands()                  /*{{{*/
 {
    return {
       {"download-file", &DoDownloadFile, _("download the given uri to the target-path")},
       {"srv-lookup", &DoSrvLookup, _("lookup a SRV record (e.g. _http._tcp.ftp.debian.org)")},
+      {"cat-file", &DoCatFile, _("concatenate files, with automatic decompression")},
       {"auto-detect-proxy", &DoAutoDetectProxy, _("detect proxy using apt.conf")},
       {nullptr, nullptr, nullptr}
    };
@@ -131,10 +200,8 @@ std::vector<aptDispatchWithHelp> GetCommands()                             /*{{{*/
                                                                        /*}}}*/
 int main(int argc,const char *argv[])                                  /*{{{*/
 {
-   InitLocale();
-
    CommandLine CmdL;
-   auto const Cmds = ParseCommandLine(CmdL, APT_CMD::APT_HELPER, &_config, &_system, argc, argv);
+   auto const Cmds = ParseCommandLine(CmdL, APT_CMD::APT_HELPER, &_config, &_system, argc, argv, &ShowHelp, &GetCommands);
 
    InitOutput();