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/*=========================================================================
Program: CMake - Cross-Platform Makefile Generator
Module: $RCSfile: cmVariableWatchCommand.h,v $
Language: C++
Date: $Date: 2008-01-23 15:27:59 $
Version: $Revision: 1.4 $
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.
=========================================================================*/
#ifndef cmVariableWatchCommand_h
#define cmVariableWatchCommand_h
#include "cmCommand.h"
class cmVariableWatchCommandHandler
{
public:
typedef std::vector<std::string> VectorOfCommands;
VectorOfCommands Commands;
};
/** \class cmVariableWatchCommand
* \brief Watch when the variable changes and invoke command
*
*/
class cmVariableWatchCommand : public cmCommand
{
public:
/**
* This is a virtual constructor for the command.
*/
virtual cmCommand* Clone()
{
return new cmVariableWatchCommand;
}
//! Default constructor
cmVariableWatchCommand();
/**
* This is called when the command is first encountered in
* the CMakeLists.txt file.
*/
virtual bool InitialPass(std::vector<std::string> const& args,
cmExecutionStatus &status);
/**
* This determines if the command is invoked when in script mode.
*/
virtual bool IsScriptable() { return true; }
/**
* The name of the command as specified in CMakeList.txt.
*/
virtual const char* GetName() { return "variable_watch";}
/**
* Succinct documentation.
*/
virtual const char* GetTerseDocumentation()
{
return "Watch the CMake variable for change.";
}
/**
* More documentation.
*/
virtual const char* GetFullDocumentation()
{
return
" variable_watch(<variable name> [<command to execute>])\n"
"If the specified variable changes, the message will be printed about "
"the variable being changed. If the command is specified, the command "
"will be executed. The command will receive the following arguments:"
" COMMAND(<variable> <access> <value> <current list file> <stack>)";
}
cmTypeMacro(cmVariableWatchCommand, cmCommand);
void VariableAccessed(const std::string& variable, int access_type,
const char* newValue, const cmMakefile* mf);
protected:
std::map<std::string, cmVariableWatchCommandHandler> Handlers;
bool InCallback;
};
#endif
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