convert FileExists to DirectoryExists to check if the path is really a

directory (and to have a better method name in the error message if not)

apt-pkg/init.cc

@@ -94,10 +94,10 @@ bool pkgInitConfig(Configuration &Cnf)
 
    // Read the configuration parts dir
    string Parts = Cnf.FindDir("Dir::Etc::parts");
-   if (FileExists(Parts) == true)
+   if (DirectoryExists(Parts) == true)
       Res &= ReadConfigDir(Cnf,Parts);
    else
-      _error->WarningE("FileExists",_("Unable to read %s"),Parts.c_str());
+      _error->WarningE("DirectoryExists",_("Unable to read %s"),Parts.c_str());
 
    // Read the main config file
    string FName = Cnf.FindFile("Dir::Etc::main");

apt-pkg/policy.cc

@@ -291,9 +291,9 @@ bool ReadPinDir(pkgPolicy &Plcy,string Dir)
    if (Dir.empty() == true)
       Dir = _config->FindDir("Dir::Etc::PreferencesParts");
 
-   if (FileExists(Dir) == false)
+   if (DirectoryExists(Dir) == false)
    {
-      _error->WarningE("FileExists",_("Unable to read %s"),Dir.c_str());
+      _error->WarningE("DirectoryExists",_("Unable to read %s"),Dir.c_str());
       return true;
    }
 

apt-pkg/sourcelist.cc

@@ -199,15 +199,15 @@ bool pkgSourceList::ReadMainList()
    
    if (FileExists(Main) == true)
       Res &= ReadAppend(Main);
-   else if (FileExists(Parts) == false)
+   else if (DirectoryExists(Parts) == false)
       // Only warn if there are no sources.list.d.
-      _error->WarningE("FileExists",_("Unable to read %s"),Main.c_str());
+      _error->WarningE("DirectoryExists", _("Unable to read %s"), Parts.c_str());
 
-   if (FileExists(Parts) == true)
+   if (DirectoryExists(Parts) == true)
       Res &= ReadSourceDir(Parts);
    else if (FileExists(Main) == false)
       // Only warn if there is no sources.list file.
-      _error->WarningE("FileExists",_("Unable to read %s"),Parts.c_str());
+      _error->WarningE("FileExists", _("Unable to read %s"), Main.c_str());
 
    return Res;
 }