[R-package] [cmake] simplify CMake-based R builds (#6591)

Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

R-package/src/install.libs.R

@@ -15,14 +15,8 @@ if (.Machine$sizeof.pointer != 8L) {
   stop("LightGBM only supports 64-bit R, please check the version of R and Rtools.")
 }
 
-R_int_UUID <- .Internal(internalsID())
 R_ver <- as.double(R.Version()$major) + as.double(R.Version()$minor) / 10.0
 
-if (!(R_int_UUID == "0310d4b8-ccb1-4bb8-ba94-d36a55f60262"
-    || R_int_UUID == "2fdf6c18-697a-4ba7-b8ef-11c0d92f1327")) {
-  warning("Warning: unmatched R_INTERNALS_UUID, may not run normally.")
-}
-
 # Get some paths
 source_dir <- file.path(R_PACKAGE_SOURCE, "src", fsep = "/")
 build_dir <- file.path(source_dir, "build", fsep = "/")
@@ -133,7 +127,13 @@ if (WINDOWS && use_visual_studio) {
 }
 
 # Prepare installation steps
-cmake_args <- NULL
+cmake_args <- c(
+  "-D__BUILD_FOR_R=ON"
+  # pass in R version, to help FindLibR find the R library
+  , sprintf("-DCMAKE_R_VERSION='%s.%s'", R.Version()[["major"]], R.Version()[["minor"]])
+  # ensure CMake build respects how R is configured (`R CMD config SHLIB_EXT`)
+  , sprintf("-DCMAKE_SHARED_LIBRARY_SUFFIX_CXX='%s'", SHLIB_EXT)
+)
 build_cmd <- "make"
 build_args <- c("_lightgbm", make_args_from_build_script)
 lib_folder <- file.path(source_dir, fsep = "/")
@@ -174,18 +174,6 @@ windows_makefile_generator <- WINDOWS_BUILD_TOOLS[[windows_toolchain]][["makefil
 if (use_gpu) {
   cmake_args <- c(cmake_args, "-DUSE_GPU=ON")
 }
-cmake_args <- c(cmake_args, "-D__BUILD_FOR_R=ON")
-
-# Pass in R version, used to help find R executable for linking
-R_version_string <- paste(
-  R.Version()[["major"]]
-  , R.Version()[["minor"]]
-  , sep = "."
-)
-r_version_arg <- sprintf("-DCMAKE_R_VERSION='%s'", R_version_string)
-# ensure CMake build respects how R is configured (`R CMD config SHLIB_EXT`)
-shlib_ext_arg <- sprintf("-DCMAKE_SHARED_LIBRARY_SUFFIX_CXX='%s'", SHLIB_EXT)
-cmake_args <- c(cmake_args, r_version_arg, shlib_ext_arg)
 
 # the checks below might already run `cmake -G`. If they do, set this flag
 # to TRUE to avoid re-running it later