CMake/Source/cmake.h

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/*=========================================================================
Program: CMake - Cross-Platform Makefile Generator
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Module: $RCSfile$
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) 2002 Kitware, Inc., Insight Consortium. All rights reserved.
See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
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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.
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=========================================================================*/
// This class represents a cmake invocation. It is the top level class when
// running cmake. Most cmake based GUIS should primarily create an instance
// of this class and communicate with it.
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//
// The basic process for a GUI is as follows:
//
// 1) Create a cmake instance
// 2) Set the Home & Start directories, generator, and cmake command. this
// can be done using the Set methods or by using SetArgs and passing in
// command line arguments.
// 3) Load the cache by calling LoadCache (duh)
// 4) if you are using command line arguments with -D or -C flags then
// call SetCacheArgs (or if for some other reason you want to modify the
// cache, do it now.
// 5) Finally call Configure
// 6) Let the user change values and go back to step 5
// 7) call Generate
//
// If your GUI allows the user to change the start & home directories then
// you must at a minimum redo steps 2 through 7.
//
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#include "cmStandardIncludes.h"
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#include "cmSystemTools.h"
class cmGlobalGenerator;
class cmLocalGenerator;
class cmCacheManager;
class cmMakefile;
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class cmCommand;
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class cmVariableWatch;
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class cmake
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{
public:
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///! construct an instance of cmake
cmake();
///! destruct an instance of cmake
~cmake();
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/**
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* Return major and minor version numbers for cmake.
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*/
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static unsigned int GetMajorVersion();
static unsigned int GetMinorVersion();
static const char *GetReleaseVersion();
//@{
/**
* Set/Get the home directory (or output directory) in the project. The
* home directory is the top directory of the project. It is where
* cmake was run. Remember that CMake processes
* CMakeLists files by recursing up the tree starting at the StartDirectory
* and going up until it reaches the HomeDirectory.
*/
void SetHomeDirectory(const char* dir);
const char* GetHomeDirectory() const
{
return m_cmHomeDirectory.c_str();
}
void SetHomeOutputDirectory(const char* lib);
const char* GetHomeOutputDirectory() const
{
return m_HomeOutputDirectory.c_str();
}
//@}
//@{
/**
* Set/Get the start directory (or output directory). The start directory
* is the directory of the CMakeLists.txt file that started the current
* round of processing. Remember that CMake processes CMakeLists files by
* recursing up the tree starting at the StartDirectory and going up until
* it reaches the HomeDirectory.
*/
void SetStartDirectory(const char* dir)
{
m_cmStartDirectory = dir;
cmSystemTools::ConvertToUnixSlashes(m_cmStartDirectory);
}
const char* GetStartDirectory() const
{
return m_cmStartDirectory.c_str();
}
void SetStartOutputDirectory(const char* lib)
{
m_StartOutputDirectory = lib;
cmSystemTools::ConvertToUnixSlashes(m_StartOutputDirectory);
}
const char* GetStartOutputDirectory() const
{
return m_StartOutputDirectory.c_str();
}
//@}
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/**
* Dump documentation to a file. If 0 is returned, the
* operation failed.
*/
int DumpDocumentationToFile(std::ostream&);
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/**
* Handle a command line invocation of cmake.
*/
int Run(const std::vector<std::string>&args)
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{ return this->Run(args, false); }
int Run(const std::vector<std::string>&args, bool noconfigure);
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/**
* Generate the SourceFilesList from the SourceLists. This should only be
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* done once to be safe. The argument is a list of command line
* arguments. The first argument should be the name or full path
* to the command line version of cmake. For building a GUI,
* you would pass in the following arguments:
* /path/to/cmake -H/path/to/source -B/path/to/build
* If you only want to parse the CMakeLists.txt files,
* but not actually generate the makefiles, use buildMakefiles = false.
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*/
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int Generate();
/**
* Configure the cmMakefiles. This routine will create a GlobalGenerator if
* one has not already been set. It will then Call Configure on the
* GlobalGenerator. This in turn will read in an process all the CMakeList
* files for the tree. It will not produce any actual Makefiles, or
* workspaces. Generate does that. */
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int Configure();
/**
* Configure the cmMakefiles. This routine will create a GlobalGenerator if
* one has not already been set. It will then Call Configure on the
* GlobalGenerator. This in turn will read in an process all the CMakeList
* files for the tree. It will not produce any actual Makefiles, or
* workspaces. Generate does that. */
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int LoadCache();
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///! Create a GlobalGenerator
cmGlobalGenerator* CreateGlobalGenerator(const char* name);
///! Return the global generator assigned to this instance of cmake
cmGlobalGenerator* GetGlobalGenerator() { return m_GlobalGenerator; };
///! Return the global generator assigned to this instance of cmake
void SetGlobalGenerator(cmGlobalGenerator *);
///! Get the names of the current registered generators
void GetRegisteredGenerators(std::vector<std::string>& names);
///! get the cmCachemManager used by this invocation of cmake
cmCacheManager *GetCacheManager() { return m_CacheManager; }
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///! set the cmake command this instance of cmake should use
void SetCMakeCommand(const char* cmd) { m_CMakeCommand = cmd; }
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/**
* Given a variable name, return its value (as a string).
*/
const char* GetCacheDefinition(const char*) const;
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///! Add an entry into the cache
void AddCacheEntry(const char* key, const char* value,
const char* helpString,
int type);
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/**
* Execute commands during the build process. Supports options such
* as echo, remove file etc.
*/
static int CMakeCommand(std::vector<std::string>&);
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/**
* Add a command to this cmake instance
*/
void AddCommand(cmCommand* );
/**
* Get a command by its name
*/
cmCommand *GetCommand(const char *name);
/** Check if a command exists. */
bool CommandExists(const char* name) const;
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/**
* Is cmake in the process of a local cmake invocation. If so, we know the
* cache is already configured and ready to go.
*/
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bool GetLocal() { return m_Local; }
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///! Display command line useage
void Usage(const char *program);
///! Parse command line arguments
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void SetArgs(const std::vector<std::string>&);
///! Is this cmake running as a result of a TRY_COMPILE command
bool GetIsInTryCompile() { return m_InTryCompile; }
///! Is this cmake running as a result of a TRY_COMPILE command
void SetIsInTryCompile(bool i) { m_InTryCompile = i; }
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///! Parse command line arguments that might set cache values
void SetCacheArgs(const std::vector<std::string>&);
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typedef void (*ProgressCallback)(const char*msg, float progress, void *);
/**
* Set the function used by GUI's to receive progress updates
* Function gets passed: message as a const char*, a progress
* amount ranging from 0 to 1.0 and client data. The progress
* number provided may be negative in cases where a message is
* to be displayed without any progress percentage.
*/
void SetProgressCallback(ProgressCallback f, void* clientData=0);
///! this is called by generators to update the progress
void UpdateProgress(const char *msg, float prog);
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///! Get the variable watch object
cmVariableWatch* GetVariableWatch() { return m_VariableWatch; }
void GetCommandDocumentation(std::vector<cmDocumentationEntry>&) const;
void GetGeneratorDocumentation(std::vector<cmDocumentationEntry>&);
///! Do all the checks before running configure
int DoPreConfigureChecks();
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protected:
typedef cmGlobalGenerator* (*CreateGeneratorFunctionType)();
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typedef std::map<cmStdString, cmCommand*> RegisteredCommandsMap;
typedef std::map<cmStdString, CreateGeneratorFunctionType> RegisteredGeneratorsMap;
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RegisteredCommandsMap m_Commands;
RegisteredGeneratorsMap m_Generators;
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void AddDefaultCommands();
void AddDefaultGenerators();
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cmGlobalGenerator *m_GlobalGenerator;
cmCacheManager *m_CacheManager;
std::string m_cmHomeDirectory;
std::string m_HomeOutputDirectory;
std::string m_cmStartDirectory;
std::string m_StartOutputDirectory;
///! return true if the same cmake was used to make the cache.
bool CacheVersionMatches();
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///! read in a cmake list file to initialize the cache
void ReadListFile(const char *path);
///! used by Run
int LocalGenerate();
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/**
* Generate CMAKE_ROOT and CMAKE_COMMAND cache entries
*/
int AddCMakePaths(const char *arg0);
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cmVariableWatch* m_VariableWatch;
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private:
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ProgressCallback m_ProgressCallback;
void* m_ProgressCallbackClientData;
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bool m_Verbose;
bool m_Local;
bool m_InTryCompile;
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std::string m_CMakeCommand;
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const char* m_CXXEnvironment;
const char* m_CCEnvironment;
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};
#define CMAKE_STANDARD_OPTIONS_TABLE \
{"-C<initial-cache>", "Pre-load cmake cache from given file.", \
"When cmake is first run in an empty build tree, it creates a " \
"CMakeCache.txt file and populates it with customizable settings " \
"for the project. This option may be used to specify a file from " \
"which to load cache entries before the first pass through " \
"the project's cmake listfiles. The loaded entries take priority " \
"over the project's default values."}, \
{"-D<var>:<type>=<value>", "Create a cmake cache entry.", \
"When cmake is first run in an empty build tree, it creates a " \
"CMakeCache.txt file and populates it with customizable settings " \
"for the project. This option may be used to specify a setting " \
"that takes priority over the project's default value. The option " \
"may be repeated for as many cache entries as desired."}, \
{"-G<generator-name>", "Specify a makefile generator.", \
"CMake may support multiple native build systems on certain platforms. " \
"A makefile generator is responsible for generating a particular build " \
"system. Possible generator names are specified in the Generators " \
"section."}
#define CMAKE_STANDARD_INTRODUCTION \
{0, \
"CMake is a cross-platform build system generator. Projects " \
"specify their build process with platform-independent CMake listfiles " \
"included in each directory of a source tree with the name CMakeLists.txt. " \
"Users build a project by using CMake to generate a build system " \
"for a native tool on their platform.", 0}