Show NSC package defaults

Author: AnastaZIuk

tools/nsc/CMakeLists.txt

@@ -1,12 +1,12 @@
 set(NBL_NSC_MODE "PACKAGE" CACHE STRING "How to provide the nsc build tool. Valid values: SOURCE and PACKAGE")
 set_property(CACHE NBL_NSC_MODE PROPERTY STRINGS SOURCE PACKAGE)
-set(NBL_NSC_PACKAGE_ROOT "" CACHE PATH "Path to an unpacked Nabla package root that exposes COMPONENTS NSC")
-set(NBL_NSC_MANIFEST_ROOT "" CACHE PATH "Path to the local nsc manifest root. Defaults to tools/nsc/manifests.")
+set(NBL_NSC_PACKAGE_ROOT "" CACHE PATH "Path to an unpacked Nabla package root that exposes COMPONENTS NSC.")
+set(NBL_NSC_MANIFEST_ROOT "" CACHE PATH "Path to the local nsc manifest root.")
 set(NBL_NSC_REPO "" CACHE STRING "GitHub repository used to resolve nsc package payload assets.")
-set(NBL_NSC_TAG "" CACHE STRING "GitHub release tag used to resolve nsc package payload assets.")
+set(NBL_NSC_TAG "" CACHE STRING "Explicit GitHub release tag override for the nsc package payload.")
 set(NBL_NSC_TAG_FILE "" CACHE FILEPATH "Path to the text file that pins the GitHub release tag for the nsc package payload.")
 set(NBL_NSC_CHANNEL "" CACHE STRING "Manifest channel used to resolve the host nsc package payload.")
-set(NBL_NSC_CACHE_ROOT "" CACHE PATH "Shared NAM cache root override for nsc package payloads.")
+set(NBL_NSC_CACHE_ROOT "" CACHE PATH "Shared NAM cache root used for nsc package payloads.")
 set(NBL_NSC_TOOLCHAIN_ROOT "" CACHE PATH "Directory used to materialize the fetched nsc package payload.")
 set(NBL_NSC_EXTRA_ARGS "" CACHE STRING "Semicolon-separated extra arguments appended to every nsc invocation")
 
@@ -49,6 +49,32 @@ function(nbl_nsc_get_default_toolchain_root OUT_VAR)
 	set(${OUT_VAR} "${_toolchain_root}" PARENT_SCOPE)
 endfunction()
 
+nbl_nsc_get_default_host_channel(_nbl_nsc_default_channel)
+file(TO_CMAKE_PATH "${CMAKE_CURRENT_LIST_DIR}/manifests" _nbl_nsc_default_manifest_root)
+set(_nbl_nsc_default_repo "Devsh-Graphics-Programming/Nabla-Asset-Manifests")
+set(_nbl_nsc_default_tag_file "${_nbl_nsc_default_manifest_root}/${_nbl_nsc_default_channel}.tag")
+nbl_nsc_get_default_toolchain_root(_nbl_nsc_default_toolchain_root)
+nam_get_default_cache_root(_nbl_nsc_default_cache_root)
+
+if(NOT NBL_NSC_MANIFEST_ROOT)
+	set(NBL_NSC_MANIFEST_ROOT "${_nbl_nsc_default_manifest_root}" CACHE PATH "Path to the local nsc manifest root." FORCE)
+endif()
+if(NOT NBL_NSC_REPO)
+	set(NBL_NSC_REPO "${_nbl_nsc_default_repo}" CACHE STRING "GitHub repository used to resolve nsc package payload assets." FORCE)
+endif()
+if(NOT NBL_NSC_TAG_FILE)
+	set(NBL_NSC_TAG_FILE "${_nbl_nsc_default_tag_file}" CACHE FILEPATH "Path to the text file that pins the GitHub release tag for the nsc package payload." FORCE)
+endif()
+if(NOT NBL_NSC_CHANNEL)
+	set(NBL_NSC_CHANNEL "${_nbl_nsc_default_channel}" CACHE STRING "Manifest channel used to resolve the host nsc package payload." FORCE)
+endif()
+if(NOT NBL_NSC_CACHE_ROOT)
+	set(NBL_NSC_CACHE_ROOT "${_nbl_nsc_default_cache_root}" CACHE PATH "Shared NAM cache root used for nsc package payloads." FORCE)
+endif()
+if(NOT NBL_NSC_TOOLCHAIN_ROOT)
+	set(NBL_NSC_TOOLCHAIN_ROOT "${_nbl_nsc_default_toolchain_root}" CACHE PATH "Directory used to materialize the fetched nsc package payload." FORCE)
+endif()
+
 function(nbl_nsc_register_manifest_dependencies MANIFEST_ROOT CHANNEL)
 	file(GLOB_RECURSE _nbl_nsc_manifest_files CONFIGURE_DEPENDS LIST_DIRECTORIES false "${MANIFEST_ROOT}/${CHANNEL}/*.dvc")
 	if(_nbl_nsc_manifest_files)