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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file Copyright.txt or https://cmake.org/licensing for details. */
#ifndef cmCommand_h
#define cmCommand_h
#include "cmConfigure.h" // IWYU pragma: keep
#include <memory>
#include <string>
#include <vector>
class cmExecutionStatus;
class cmMakefile;
struct cmListFileArgument;
/** \class cmCommand
* \brief Superclass for all commands in CMake.
*
* cmCommand is the base class for all commands in CMake. A command
* manifests as an entry in CMakeLists.txt and produces one or
* more makefile rules. Commands are associated with a particular
* makefile. This base class cmCommand defines the API for commands
* to support such features as enable/disable, inheritance,
* documentation, and construction.
*/
class cmCommand
{
public:
/**
* Construct the command. By default it has no makefile.
*/
cmCommand() = default;
/**
* Need virtual destructor to destroy real command type.
*/
virtual ~cmCommand() = default;
cmCommand(cmCommand const&) = delete;
cmCommand& operator=(cmCommand const&) = delete;
/**
* Specify the makefile.
*/
void SetMakefile(cmMakefile* m) { this->Makefile = m; }
cmMakefile* GetMakefile() { return this->Makefile; }
/**
* This is called by the cmMakefile when the command is first
* encountered in the CMakeLists.txt file. It expands the command's
* arguments and then invokes the InitialPass.
*/
virtual bool InvokeInitialPass(const std::vector<cmListFileArgument>& args,
cmExecutionStatus& status);
/**
* This is called when the command is first encountered in
* the CMakeLists.txt file.
*/
virtual bool InitialPass(std::vector<std::string> const& args,
cmExecutionStatus&) = 0;
/**
* This is called at the end after all the information
* specified by the command is accumulated. Most commands do
* not implement this method. At this point, reading and
* writing to the cache can be done.
*/
virtual void FinalPass() {}
/**
* Does this command have a final pass? Query after InitialPass.
*/
virtual bool HasFinalPass() const { return false; }
/**
* This is a virtual constructor for the command.
*/
virtual std::unique_ptr<cmCommand> Clone() = 0;
/**
* Return the last error string.
*/
const char* GetError();
/**
* Set the error message
*/
void SetError(const std::string& e);
protected:
cmMakefile* Makefile = nullptr;
private:
std::string Error;
};
#endif
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