CMake/Source/cmSetCommand.h

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

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

  Copyright (c) 2002 Insight Consortium. All rights reserved.
  See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm 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.

=========================================================================*/
#ifndef cmSetCommand_h
#define cmSetCommand_h

#include "cmStandardIncludes.h"
#include "cmCommand.h"

/** \class cmSetCommand
 * \brief Set a CMAKE variable
 *
 * cmSetCommand sets a variable to a value with expansion.  
 */
class cmSetCommand : public cmCommand
{
public:
  /**
   * This is a virtual constructor for the command.
   */
  virtual cmCommand* Clone() 
    {
    return new cmSetCommand;
    }

  /**
   * This is called when the command is first encountered in
   * the CMakeLists.txt file.
   */
  virtual bool InitialPass(std::vector<std::string> const& args);

  /**
   * This determines if the command gets propagated down
   * to makefiles located in subdirectories.
   */
  virtual bool IsInherited() {return true;}

  /**
   * The name of the command as specified in CMakeList.txt.
   */
  virtual const char* GetName() {return "SET";}
  
  /**
   * Succinct documentation.
   */
  virtual const char* GetTerseDocumentation() 
    {
    return "Set a CMAKE variable to a value";
    }
  
  /**
   * More documentation.
   */
  virtual const char* GetFullDocumentation()
    {
    return
      "SET(VAR [VALUE] [CACHE TYPE DOCSTRING [FORCE]])\n"
      "Within CMAKE sets VAR to the value VALUE. VALUE is expanded before VAR "
      "is set to it. If CACHE is present, then the VAR is put in the cache."
      " TYPE and DOCSTRING are required.  TYPE may be BOOL, PATH, FILEPATH, STRING, INTERNAL, "
      "or STATIC.  If TYPE is INTERNAL, then the "
      " VALUE is Always written into the cache, replacing any values "
      "existing in the cache.  If it is not a CACHE VAR, then this always "
      "writes into the current makefile. The FORCE option will overwrite"
      "the CACHE value removing any changes from the USER.\n"
      "An optional syntax is SET(VAR VALUE1 ... VALUEN).\n"
      "In this case VAR is set to a ; separated list of values.";
    }
  
  cmTypeMacro(cmSetCommand, cmCommand);
};



#endif