store all CMake files in one place (#4087)

CMakeLists.txt

@@ -100,7 +100,6 @@ include_directories(${EIGEN_DIR})
 ADD_DEFINITIONS(-DEIGEN_MPL2_ONLY)
 
 if(__BUILD_FOR_R)
-    list(APPEND CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake/modules")
     find_package(LibR REQUIRED)
     message(STATUS "LIBR_EXECUTABLE: ${LIBR_EXECUTABLE}")
     message(STATUS "LIBR_INCLUDE_DIRS: ${LIBR_INCLUDE_DIRS}")
@@ -157,7 +156,7 @@ endif(USE_GPU)
 
 if(__INTEGRATE_OPENCL)
     if(WIN32)
-        include(CMakeIntegratedOpenCL.cmake)
+        include(cmake/IntegratedOpenCL.cmake)
         ADD_DEFINITIONS(-DUSE_GPU)
     else()
         message(FATAL_ERROR "Integrated OpenCL build is available only for Windows")
@@ -418,10 +417,10 @@ if(USE_GPU)
 endif(USE_GPU)
 
 if(__INTEGRATE_OPENCL)
-  # targets OpenCL and Boost are added in CMakeIntegratedOpenCL.cmake
+  # targets OpenCL and Boost are added in IntegratedOpenCL.cmake
   add_dependencies(lightgbm OpenCL Boost)
   add_dependencies(_lightgbm OpenCL Boost)
-  # variables INTEGRATED_OPENCL_* are set in CMakeIntegratedOpenCL.cmake
+  # variables INTEGRATED_OPENCL_* are set in IntegratedOpenCL.cmake
   target_include_directories(lightgbm PRIVATE ${INTEGRATED_OPENCL_INCLUDES})
   target_include_directories(_lightgbm PRIVATE ${INTEGRATED_OPENCL_INCLUDES})
   target_compile_definitions(lightgbm PRIVATE ${INTEGRATED_OPENCL_DEFINITIONS})

build-cran-package.sh

@@ -63,7 +63,6 @@ cd ${TEMP_R_DIR}
     # Remove files not needed for CRAN
     echo "Removing files not needed for CRAN"
     rm src/install.libs.R
-    rm -r src/cmake/
     rm -r inst/
     rm -r pkgdown/
     rm cran-comments.md

build_r.R

@@ -316,6 +316,14 @@ for (submodule in list.dirs(
 }
 
 # copy files into the place CMake expects
+CMAKE_MODULES_R_DIR <- file.path(TEMP_SOURCE_DIR, "cmake", "modules")
+dir.create(CMAKE_MODULES_R_DIR, recursive = TRUE)
+result <- file.copy(
+  from = file.path("cmake", "modules", "FindLibR.cmake")
+  , to = sprintf("%s/", CMAKE_MODULES_R_DIR)
+  , overwrite = TRUE
+)
+.handle_result(result)
 for (src_file in c("lightgbm_R.cpp", "lightgbm_R.h", "R_object_helper.h")) {
   result <- file.copy(
     from = file.path(TEMP_SOURCE_DIR, src_file)

python-package/MANIFEST.in

@@ -3,7 +3,7 @@ include LICENSE
 include *.rst *.txt
 recursive-include lightgbm VERSION.txt *.py *.so
 include compile/CMakeLists.txt
-include compile/CMakeIntegratedOpenCL.cmake
+include compile/cmake/IntegratedOpenCL.cmake
 recursive-include compile *.so
 recursive-include compile/Release *.dll
 include compile/external_libs/compute/CMakeLists.txt

python-package/setup.py

@@ -83,8 +83,10 @@ def copy_files(integrated_opencl=False, use_gpu=False):
                   os.path.join(CURRENT_DIR, "compile", "CMakeLists.txt"),
                   verbose=0)
         if integrated_opencl:
-            copy_file(os.path.join(CURRENT_DIR, os.path.pardir, "CMakeIntegratedOpenCL.cmake"),
-                      os.path.join(CURRENT_DIR, "compile", "CMakeIntegratedOpenCL.cmake"),
+            if not os.path.exists(os.path.join(CURRENT_DIR, "compile", "cmake")):
+                os.makedirs(os.path.join(CURRENT_DIR, "compile", "cmake"))
+            copy_file(os.path.join(CURRENT_DIR, os.path.pardir, "cmake", "IntegratedOpenCL.cmake"),
+                      os.path.join(CURRENT_DIR, "compile", "cmake", "IntegratedOpenCL.cmake"),
                       verbose=0)