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99 lines
2.7 KiB
99 lines
2.7 KiB
/*============================================================================
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CMake - Cross Platform Makefile Generator
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Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
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Distributed under the OSI-approved BSD License (the "License");
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see accompanying file Copyright.txt for details.
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This software is distributed WITHOUT ANY WARRANTY; without even the
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implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the License for more information.
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============================================================================*/
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#ifndef cmVariableWatchCommand_h
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#define cmVariableWatchCommand_h
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#include "cmCommand.h"
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class cmVariableWatchCommandHandler
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{
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public:
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typedef std::vector<std::string> VectorOfCommands;
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VectorOfCommands Commands;
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};
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/** \class cmVariableWatchCommand
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* \brief Watch when the variable changes and invoke command
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*
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*/
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class cmVariableWatchCommand : public cmCommand
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{
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public:
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/**
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* This is a virtual constructor for the command.
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*/
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virtual cmCommand* Clone()
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{
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return new cmVariableWatchCommand;
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}
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//! Default constructor
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cmVariableWatchCommand();
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/**
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* This is called when the command is first encountered in
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* the CMakeLists.txt file.
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*/
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virtual bool InitialPass(std::vector<std::string> const& args,
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cmExecutionStatus &status);
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/**
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* This determines if the command is invoked when in script mode.
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*/
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virtual bool IsScriptable() { return true; }
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/** This command does not really have a final pass but it needs to
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stay alive since it owns variable watch callback information. */
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virtual bool HasFinalPass() const { return true; }
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/**
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* The name of the command as specified in CMakeList.txt.
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*/
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virtual const char* GetName() { return "variable_watch";}
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/**
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* Succinct documentation.
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*/
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virtual const char* GetTerseDocumentation()
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{
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return "Watch the CMake variable for change.";
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}
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/**
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* More documentation.
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*/
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virtual const char* GetFullDocumentation()
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{
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return
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" variable_watch(<variable name> [<command to execute>])\n"
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"If the specified variable changes, the message will be printed about "
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"the variable being changed. If the command is specified, the command "
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"will be executed. The command will receive the following arguments:"
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" COMMAND(<variable> <access> <value> <current list file> <stack>)";
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}
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cmTypeMacro(cmVariableWatchCommand, cmCommand);
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void VariableAccessed(const std::string& variable, int access_type,
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const char* newValue, const cmMakefile* mf);
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protected:
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std::map<std::string, cmVariableWatchCommandHandler> Handlers;
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bool InCallback;
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};
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#endif
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