Added IncludeMRasterLib.cmake

Author: richmit

IncludeMRasterLib.cmake

@@ -0,0 +1,71 @@
+# -*- Mode:cmake; Coding:us-ascii-unix; fill-column:158 -*-
+#########################################################################################################################################################.H.S.##
+##
+# @file      IncludeMRasterLib.cmake
+# @author    Mitch Richling http://www.mitchr.me/
+# @date      2025-01-27
+# @brief     Include MRaster config.@EOL
+# @std       cmake
+# @copyright 
+#  @parblock
+#  Copyright (c) 2025, Mitchell Jay Richling <http://www.mitchr.me/> All rights reserved.
+#  
+#  Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+#  
+#  1. Redistributions of source code must retain the above copyright notice, this list of conditions, and the following disclaimer.
+#  
+#  2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions, and the following disclaimer in the documentation
+#     and/or other materials provided with the distribution.
+#  
+#  3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software
+#     without specific prior written permission.
+#  
+#  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+#  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+#  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+#  OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+#  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+#  DAMAGE.
+#  @endparblock
+# @filedetails
+#
+#  The MRaster project's CMakeLists.txt file will export a CMake configuration file named MRasterLib.cmake into the build directory.  If a project needs
+#  to use MRaster, then it may simply include this file into its CMakeLists.txt.
+#
+#  I keep dependent repositories I have authored in the same base directory, and I always use a build directory called 'build'.  While this makes it super
+#  simple for me to pull in include files using a fixed relative path, it also complicates matters for people trying to use my code.  This include file
+#  contains a bit of code that looks for project dependencies using my preferred conventions, but provides for a bit of simple configuration and produces a
+#  far more meaningful error message.
+#
+#  The user to specify the absolute path to the MRasterLib.cmake file on the cmake command line with an option like this:
+#
+#         -DMRaster_PATH=/full/path/to/the/file/MRasterLib.cmake
+#
+#  Note the PATHS argument for find_file can be used to hard code the location of the MRasterLib.cmake file into the CMakeLists.txt file.
+#
+#  This code sets some variables:
+#   - MRaster_PATH will be set to MRaster_PATH-NOTFOUND if the file is not found.  This can be useful if you wish to replace the FATAL_ERROR message 
+#     with some other action.
+#   - MRaster_INCLUDE will be set to the include path for MRaster.  Note that MRaster is a header only library; however, it can use LibTIFF for some advanced
+#     TIFF file reader functionality -- if you don't need that, then the include path is all you need to use MRaster.
+#
+#########################################################################################################################################################.H.E.##
+
+#---------------------------------------------------------------------------------------------------------------------------------------------------------------
+find_file(MRaster_PATH "MRasterLib.cmake" PATHS "mraster/build"  "../mraster/build")
+if(NOT MRaster_PATH STREQUAL "MRaster_PATH-NOTFOUND")
+  message(STATUS "Found MRaster: ${MRaster_PATH}")
+  include("${MRaster_PATH}")
+else()
+  message(FATAL_ERROR " MRaster Search Failed!\n"
+                      "     The MRaster repository must be located in the same directory as this repository,\n"
+                      "     and must be configured with a build directory named 'build' at the root of the \n"
+                      "     MRaster repository.  That is to say, do the following in the same directory \n"
+                      "     where you cloned this repository: \n"
+                      "        git clone 'https://github.com/richmit/MRaster.git' \n"
+                      "        cd mraster/build                                   \n"
+                      "        cmake ..                                           \n"
+                      "        cd ../..                                           \n"
+                      "     Then return to this repository, and try to configure it again.\n")
+endif()
+get_target_property(MRaster_INCLUDE MRaster INTERFACE_INCLUDE_DIRECTORIES)