/*=========================================================================

  Program:   CMake - Cross-Platform Makefile Generator
  Module:    $RCSfile$
  Language:  C++
  Date:      $Date$
  Version:   $Revision$

  Copyright (c) 2002 Kitware, Inc., Insight Consortium.  All rights reserved.
  See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.

     This software is distributed WITHOUT ANY WARRANTY; without even 
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
     PURPOSE.  See the above copyright notices for more information.

=========================================================================*/
#include "cmIncludeCommand.h"


// cmIncludeCommand
bool cmIncludeCommand::InitialPass(std::vector<std::string> const& args)
{
  if (args.size()< 1 || args.size() > 4)
    {
      this->SetError("called with wrong number of arguments.  "
                     "Include only takes one file.");
      return false;
    }
  bool optional = false;
  std::string fname = args[0];
  std::string resultVarName;
  
  for (unsigned int i=1; i<args.size(); i++)
    {
    if (args[i] == "OPTIONAL") 
      {
      if (optional)
        {
        this->SetError("called with invalid arguments: OPTIONAL used twice");
        return false;
        }
      optional = true;
      }
    else if(args[i] == "RESULT_VARIABLE")
      {
      if (resultVarName.size() > 0)
        {
        this->SetError("called with invalid arguments: "
            "only one result variable allowed");
        return false;
        }
      if(++i < args.size())
        {
        resultVarName = args[i];
        }
      else
        {
        this->SetError("called with no value for RESULT_VARIABLE.");
        return false;
        }
      }
      else if(i > 1)  // compat.: in previous cmake versions the second 
                      // parameter was ignore if it wasn't "OPTIONAL"
        {
        std::string errorText = "called with invalid argument: ";  
        errorText += args[i];
        this->SetError(errorText.c_str());
        return false;
        }
    }

  if(!cmSystemTools::FileIsFullPath(fname.c_str()))
    {
    // Not a path. Maybe module.
    std::string module = fname;
    module += ".cmake";
    std::string mfile = this->Makefile->GetModulesFile(module.c_str());
    if ( mfile.size() )
      {
      fname = mfile.c_str();
      }
    }
  std::string fullFilePath;
  bool readit = 
    this->Makefile->ReadListFile( this->Makefile->GetCurrentListFile(), 
                                  fname.c_str(), &fullFilePath );
  
  // add the location of the included file if a result variable was given
  if (resultVarName.size())
    {
      this->Makefile->AddDefinition(resultVarName.c_str(), 
                                    readit?fullFilePath.c_str():"NOTFOUND");
    }

  if(!optional && !readit && !cmSystemTools::GetFatalErrorOccured())
    {
    std::string m = "Could not find include file: ";
    m += fname;
    this->SetError(m.c_str());
    return false;
    }
  return true;
}


