Add command for accessing cmake properties. At this point the only properties are VARIABLES and CACHE_VARIABLES. Also add test for this feature

Source/cmCommands.cxx

@@ -46,6 +46,7 @@
 #include "cmFindProgramCommand.cxx"
 #include "cmForEachCommand.cxx"
 #include "cmFLTKWrapUICommand.cxx"
+#include "cmGetCMakePropertyCommand.cxx"
 #include "cmGetFilenameComponentCommand.cxx"
 #include "cmGetSourceFilePropertyCommand.cxx"
 #include "cmGetTargetPropertyCommand.cxx"
@@ -132,6 +133,7 @@ void GetPredefinedCommands(std::list<cmCommand*>& commands)
   commands.push_back(new cmFindProgramCommand);
   commands.push_back(new cmForEachCommand);
   commands.push_back(new cmFLTKWrapUICommand);
+  commands.push_back(new cmGetCMakePropertyCommand);
   commands.push_back(new cmGetFilenameComponentCommand);
   commands.push_back(new cmGetSourceFilePropertyCommand);
   commands.push_back(new cmGetTargetPropertyCommand);

Source/cmGetCMakePropertyCommand.cxx

@@ -0,0 +1,60 @@
+/*=========================================================================
+
+  Program:   CMake - Cross-Platform Makefile Generator
+  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.
+
+     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.
+
+=========================================================================*/
+#include "cmGetCMakePropertyCommand.h"
+
+// cmGetCMakePropertyCommand
+bool cmGetCMakePropertyCommand::InitialPass(
+  std::vector<std::string> const& args)
+{
+  if(args.size() < 2 )
+    {
+    this->SetError("called with incorrect number of arguments");
+    return false;
+    }
+  
+  int cc;
+  std::string variable = args[0];
+  std::string output = "";
+
+  if ( args[1] == "VARIABLES" || args[1] == "CACHE_VARIABLES" )
+    {
+    int cacheonly = 0;
+    if ( args[1] == "CACHE_VARIABLES" )
+      {
+      cacheonly = 1;
+      }
+    std::vector<std::string> vars = m_Makefile->GetDefinitions(cacheonly);
+    for ( cc = 0; cc < vars.size(); cc ++ )
+      {
+      if ( cc > 0 )
+        {
+        output += ";";
+        }
+      output += vars[cc];
+      }
+    }
+  else
+    {
+    std::string emsg = "Unknown CMake property: " + args[1];
+    this->SetError(emsg.c_str());
+    return false;
+    }
+  m_Makefile->AddDefinition(variable.c_str(), output.c_str());
+  
+  return true;
+}
+

Source/cmGetCMakePropertyCommand.h

@@ -0,0 +1,68 @@
+/*=========================================================================
+
+  Program:   CMake - Cross-Platform Makefile Generator
+  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.
+
+     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 cmGetCMakePropertyCommand_h
+#define cmGetCMakePropertyCommand_h
+
+#include "cmStandardIncludes.h"
+#include "cmCommand.h"
+
+class cmGetCMakePropertyCommand : public cmCommand
+{
+public:
+  virtual cmCommand* Clone() 
+    {
+      return new cmGetCMakePropertyCommand;
+    }
+
+  /**
+   * This is called when the command is first encountered in
+   * the input file.
+   */
+  virtual bool InitialPass(std::vector<std::string> const& args);
+
+  /**
+   * The name of the command as specified in CMakeList.txt.
+   */
+  virtual const char* GetName() { return "GET_CMAKE_PROPERTY";}
+
+  /**
+   * Succinct documentation.
+   */
+  virtual const char* GetTerseDocumentation() 
+    {
+    return "Get a property of the CMake.";
+    }
+  
+  /**
+   * Longer documentation.
+   */
+  virtual const char* GetFullDocumentation()
+    {
+      return
+        "  GET_CMAKE_PROPERTY(VAR property)\n"
+        "Get a property from the CMake.  The value of the property is" 
+        "stored in the variable VAR. If the property is not found,"
+        "CMake will report an error. The properties include: VARIABLES, "
+        "CACHE_VARIABLES.";
+    }
+  
+  cmTypeMacro(cmGetCMakePropertyCommand, cmCommand);
+};
+
+
+
+#endif

Tests/SystemInformation/CMakeLists.txt

@@ -6,3 +6,8 @@ CONFIGURE_FILE(${DumpInformation_SOURCE_DIR}/DumpInformation.h.in
 ${DumpInformation_BINARY_DIR}/DumpInformation.h)
 ADD_EXECUTABLE(DumpInformation DumpInformation.cxx)
 
+GET_CMAKE_PROPERTY(VARS VARIABLES)
+FOREACH(var ${VARS})
+  MESSAGE(STATUS "Variable ${var} \"${${var}}\"")
+ENDFOREACH(var ${VARS})
+