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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile$
  Language:  C++
  Date:      $Date$
  Version:   $Revision$


  Copyright (c) 2000 National Library of Medicine
  All rights reserved.

  See COPYRIGHT.txt for copyright details.

=========================================================================*/
#include "cmCableSourceFilesCommand.h"
#include "cmCacheManager.h"

void cmCableSourceFilesCommand::FinalPass()
{
  // Get the index of the current package's cmClassFile.
  // If it doesn't exist, ignore this command.
  cmCablePackageCommand *cablePackage = m_CableData->GetCurrentPackage();
  std::string fileName = "Cxx/";
  fileName += cablePackage->GetPackageName();
  fileName += "_cxx";
  cmClassFile *ci = m_Makefile->GetClass(cablePackage->GetPackageName(),
                                         fileName.c_str());
  
  if(ci == 0)
    { return; }
  
  // The package's file has not yet been generated yet.  The dependency
  // finder will need hints.  Add one for each source file.
  for(Entries::const_iterator f = m_Entries.begin();
      f != m_Entries.end(); ++f)
    {
    std::string header = *f+".h";
    ci->m_Depends.push_back(header);
    }
}


/**
 * Write the CABLE configuration code to indicate header dependencies for
 * a package.
 */
void cmCableSourceFilesCommand::WriteConfiguration() const
{
  std::ostream& os = m_CableData->GetOutputStream();
  cmCableData::Indentation indent = m_CableData->GetIndentation();
  
  cmRegularExpression needCdataBlock("[&<>]");
  
  os << indent << "<Headers>" << std::endl;
  for(Entries::const_iterator f = m_Entries.begin();
      f != m_Entries.end(); ++f)
    {
    // Look for the normal include file.
    std::string header = *f+".h";
    if(this->SourceFileExists(header))
      {
      os << indent << "  <File name=\"" << header.c_str() << "\"/>"
         << std::endl;
      }
    else
      {
      cmSystemTools::Error("Unable to find source file ", header.c_str());
      }
    
    // Look for an instantiation file.
    std::string txx = *f+".txx";
    if(this->SourceFileExists(txx))
      {
      os << indent << "  <File name=\"" << txx.c_str()
         << "\" purpose=\"instantiate\"/>" << std::endl;
      }
    }
  os << indent << "</Headers>" << std::endl;
}


/**
 * Search the include path for the specified file.
 */
bool cmCableSourceFilesCommand::SourceFileExists(const std::string& name) const
{
  // We must locate the file in the include path so that we can detect
  // its extension, and whether there is more than one to find.
  std::string file = name;
  m_Makefile->ExpandVariablesInString(file);
      
  // See if the file just exists here.  The compiler's search path will
  // locate it.
  if(cmSystemTools::FileExists(file.c_str()))
    {
    return true;
    }
  
  // We must look for the file in the include search path.
  const std::vector<std::string>& includeDirectories =
    m_Makefile->GetIncludeDirectories();
  
  for(std::vector<std::string>::const_iterator dir = includeDirectories.begin();
      dir != includeDirectories.end(); ++dir)
    {
    std::string path = *dir + "/";
    m_Makefile->ExpandVariablesInString(path);
    if(cmSystemTools::FileExists((path+file).c_str()))
      {
      return true;
      }
    }

  // We couldn't locate the source file.
  return false;
}