streamline display of --help in all tools

By convention, if I run a tool with --help or --version I expect it to
exit successfully with the usage, while if I do call it wrong (like
without any parameters) I expect the usage message shown with a non-zero
exit.

1 files changed, 3 insertions, 17 deletions

diff --git a/cmdline/apt.cc b/cmdline/apt.cc
index 2cfdf8e8e..056cd213f 100644
--- a/cmdline/apt.cc
+++ b/cmdline/apt.cc
@@ -119,15 +119,10 @@ int main(int argc, const char *argv[])					/*{{{*/
    _config->CndSet("APT::Cmd::Show-Update-Stats", true);
 
    // Parse the command line and initialize the package library
-   CommandLine CmdL(Args.data(), _config);
-   if (CmdL.Parse(argc, argv) == false ||
-       pkgInitSystem(*_config, _system) == false)
-   {
-      _error->DumpErrors();
-      return 100;
-   }
+   CommandLine CmdL;
+   ParseCommandLine(CmdL, Cmds, Args.data(), NULL, &_system, argc, argv, ShowHelp);
 
-   if(!isatty(STDOUT_FILENO) && 
+   if(!isatty(STDOUT_FILENO) &&
       _config->FindB("Apt::Cmd::Disable-Script-Warning", false) == false)
    {
       std::cerr << std::endl
@@ -138,15 +133,6 @@ int main(int argc, const char *argv[])					/*{{{*/
                 << std::endl;
    }
 
-   // See if the help should be shown
-   if (_config->FindB("help") == true ||
-       _config->FindB("version") == true ||
-       CmdL.FileSize() == 0)
-   {
-      ShowHelp(CmdL);
-      return 0;
-   }
-
    // see if we are in simulate mode
    CheckSimulateMode(CmdL);