reorganize and reformat

cmake/install/Cpack.cmake

@@ -1,8 +1,29 @@
-set(CPACK_RESOURCE_FILE_README "${CMAKE_CURRENT_SOURCE_DIR}/README.md")
-set(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_CURRENT_SOURCE_DIR}/LICENSE")
-set(CPACK_SOURCE_GENERATOR "TGZ;ZIP")
-set(CPACK_SOURCE_IGNORE_FILES /.git /dist /.*build.* /\\\\.DS_Store)
+#[[
+Package generation using CPack
+
+References:
+  - https://github.com/MangaD/cpp-project-template/blob/main/cmake/cpack_module.cmake
+  - https://github.com/gabime/spdlog/blob/v1.x/cmake/spdlogCPack.cmake
+  - https://github.com/retifrav/cmake-cpack-example/tree/master
+]]
+include_guard(GLOBAL)
+
+set(CPACK_RESOURCE_FILE_README
+    "${CMAKE_CURRENT_SOURCE_DIR}/README.md"
+    CACHE STRING "Readme")
+set(CPACK_RESOURCE_FILE_LICENSE
+    "${CMAKE_CURRENT_SOURCE_DIR}/LICENSE"
+    CACHE STRING "License")
+set(CPACK_SOURCE_GENERATOR
+    "TGZ;ZIP"
+    CACHE STRING "Source generator")
+# cmake-format: off
+set(CPACK_SOURCE_IGNORE_FILES
+  /.git
+  /dist
+  /.*build.*
+  /\\\\.DS_Store
+)
+# cmake-format: on
+
 include(CPack)
-# https://github.com/MangaD/cpp-project-template/blob/main/cmake/cpack_module.cmake
-# https://github.com/gabime/spdlog/blob/v1.x/cmake/spdlogCPack.cmake
-# https://github.com/retifrav/cmake-cpack-example/tree/master