apt-helper: Add a cat-file command for concatening files

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

diff --git a/cmdline/apt-helper.cc b/cmdline/apt-helper.cc
index dc4efb32b1ea7d5f1157de695e8cbc058487287c..e8b16c4e5bd1accfeb0db9c19dcec6b80b7411c3 100644 (file)
--- a/cmdline/apt-helper.cc
+++ b/cmdline/apt-helper.cc
@@ -22,16 +22,19 @@
 #include <apt-private/private-output.h>
 #include <apt-private/private-download.h>
 #include <apt-private/private-cmndline.h>
+#include <apt-private/private-main.h>
 #include <apt-pkg/srvrec.h>
 
 #include <iostream>
 #include <string>
 #include <vector>
 
+#include <stdlib.h>
+
 #include <apti18n.h>
                                                                        /*}}}*/
 
-static bool DoAutoDetectProxy(CommandLine &CmdL)
+static bool DoAutoDetectProxy(CommandLine &CmdL)                       /*{{{*/
 {
    if (CmdL.FileSize() != 2)
       return _error->Error(_("Need one URL as argument"));
@@ -43,15 +46,13 @@ static bool DoAutoDetectProxy(CommandLine &CmdL)
 
    return true;
 }
-
-static bool DoDownloadFile(CommandLine &CmdL)
+                                                                       /*}}}*/
+static bool DoDownloadFile(CommandLine &CmdL)                          /*{{{*/
 {
    if (CmdL.FileSize() <= 2)
       return _error->Error(_("Must specify at least one pair url/filename"));
 
-   AcqTextStatus Stat(std::cout, ScreenWidth,_config->FindI("quiet",0));
-   pkgAcquire Fetcher(&Stat);
-
+   aptAcquireWithTextStatus Fetcher;
    size_t fileind = 0;
    std::vector<std::string> targetfiles;
    while (fileind + 2 <= CmdL.FileSize())
@@ -78,8 +79,8 @@ static bool DoDownloadFile(CommandLine &CmdL)
 
    return true;
 }
-
-static bool DoSrvLookup(CommandLine &CmdL)
+                                                                       /*}}}*/
+static bool DoSrvLookup(CommandLine &CmdL)                             /*{{{*/
 {
    if (CmdL.FileSize() <= 1)
       return _error->Error("Must specify at least one SRV record");
@@ -105,60 +106,70 @@ static bool DoSrvLookup(CommandLine &CmdL)
    }
    return true;
 }
-
-static bool ShowHelp(CommandLine &)
+                                                                       /*}}}*/
+static bool DoCatFile(CommandLine &CmdL)                               /*{{{*/
 {
-   ioprintf(std::cout, "%s %s (%s)\n", PACKAGE, PACKAGE_VERSION, COMMON_ARCH);
+   FileFd fd;
+   FileFd out;
+   char buf[4096];
+   unsigned long long read;
+
+   out.OpenDescriptor(STDOUT_FILENO, FileFd::WriteOnly);
+
+   if (CmdL.FileSize() <= 1)
+      return _error->Error("Must specify at least one file name");
+
+   for(size_t i = 1; CmdL.FileList[i] != NULL; ++i)
+   {
+      std::string const name = CmdL.FileList[i];
 
-   if (_config->FindB("version") == true)
-     return true;
+      if (fd.Open(name, FileFd::ReadOnly, FileFd::Extension) == false)
+         return false;
 
+      for (;;) {
+         if (fd.Read(buf, sizeof(buf), &read) == false)
+            return false;
+         if (read == 0)
+            break;
+         if (out.Write(buf, read) == false)
+            return false;
+      }
+   }
+   return true;
+}
+                                                                       /*}}}*/
+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"
-      "\n"
-      "Commands:\n"
-      "   download-file - download the given uri to the target-path\n"
-      "   srv-lookup - lookup a SRV record (e.g. _http._tcp.ftp.debian.org)\n"
-      "   auto-detect-proxy - detect proxy using apt.conf\n"
-      "\n"
-      "                       This APT helper has Super Meep Powers.\n");
+      _("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;
 }
-
-
+                                                                       /*}}}*/
+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}
+   };
+}
+                                                                       /*}}}*/
 int main(int argc,const char *argv[])                                  /*{{{*/
 {
-   CommandLine::Dispatch Cmds[] = {{"help",&ShowHelp},
-                                  {"download-file", &DoDownloadFile},
-                                  {"srv-lookup", &DoSrvLookup},
-                                  {"auto-detect-proxy", &DoAutoDetectProxy},
-                                   {0,0}};
+   InitLocale();
 
-   std::vector<CommandLine::Args> Args = getCommandArgs(
-      "apt-download", CommandLine::GetCommand(Cmds, argc, argv));
-
-   // Set up gettext support
-   setlocale(LC_ALL,"");
-   textdomain(PACKAGE);
-
-   // Parse the command line and initialize the package library
    CommandLine CmdL;
-   ParseCommandLine(CmdL, Cmds, Args.data(), &_config, &_system, argc, argv, ShowHelp);
+   auto const Cmds = ParseCommandLine(CmdL, APT_CMD::APT_HELPER, &_config, &_system, argc, argv, &ShowHelp, &GetCommands);
 
    InitOutput();
 
-   // Match the operation
-   CmdL.DispatchArg(Cmds);
-
-   // Print any errors or warnings found during parsing
-   bool const Errors = _error->PendingError();
-   if (_config->FindI("quiet",0) > 0)
-      _error->DumpErrors();
-   else
-      _error->DumpErrors(GlobalError::DEBUG);
-   return Errors == true ? 100 : 0;
+   return DispatchCommandLine(CmdL, Cmds);
 }
                                                                        /*}}}*/