ENH: Added UTILITY_SOURCE command for specifying where a 3rd party utility's source is located when it is included in the distribution of a project.

Source/cmUtilitySourceCommand.h

@@ -0,0 +1,80 @@
+/*=========================================================================
+
+  Program:   Insight Segmentation & Registration Toolkit
+  Module:    $RCSfile$
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+
+  Copyright (c) 2000 National Library of Medicine
+  All rights reserved.
+
+  See COPYRIGHT.txt for copyright details.
+
+=========================================================================*/
+#ifndef cmUtilitySourceCommand_h
+#define cmUtilitySourceCommand_h
+
+#include "cmStandardIncludes.h"
+#include "cmCommand.h"
+
+/** \class cmUtilitySourceCommand
+ * \brief A command to setup a cache entry with the location of a third-party
+ * utility's source.
+ *
+ * cmUtilitySourceCommand is used when a third-party utility's source is
+ * included in the project's source tree.  It specifies the location of
+ * the executable's source, and any files that may be needed to confirm the
+ * identity of the source.
+ */
+class cmUtilitySourceCommand : public cmCommand
+{
+public:
+  /**
+   * This is a virtual constructor for the command.
+   */
+  virtual cmCommand* Clone() 
+    {
+    return new cmUtilitySourceCommand;
+    }
+
+  /**
+   * This is called when the command is first encountered in
+   * the CMakeLists.txt file.
+   */
+  virtual bool Invoke(std::vector<std::string>& args);
+
+  /**
+   * The name of the command as specified in CMakeList.txt.
+   */
+  virtual const char* GetName() { return "UTILITY_SOURCE";}
+
+  /**
+   * Succinct documentation.
+   */
+  virtual const char* GetTerseDocumentation() 
+    {
+    return "Specify the source tree of a third-party utility.";
+    }
+  
+  /**
+   * More documentation.
+   */
+  virtual const char* GetFullDocumentation()
+    {
+    return
+      "UTILITY_SOURCE(cache_entry executable_name path_to_source [file1 file2 ...])\n"
+      "When a third-party utility's source is included in the distribution,\n"
+      "this command specifies its location and name.  The cache entry will\n"
+      "not be set unless the path_to_source and all listed files exist.  It\n"
+      "is assumed that the source tree of the utility will have been built\n"
+      "before it is needed.";
+    }
+  
+  cmTypeMacro(cmUtilitySourceCommand, cmCommand);
+};
+
+
+
+#endif