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# FindR.cmkae
# Make sure find package macros are included
set(TEMP_CMAKE_FIND_APPBUNDLE ${CMAKE_FIND_APPBUNDLE})
set(CMAKE_FIND_APPBUNDLE "NEVER")
# Find R.
find_program(R_EXECUTABLE R DOC "R executable.")
if(R_EXECUTABLE)
# Get the location of R.
execute_process(
WORKING_DIRECTORY .
COMMAND ${R_EXECUTABLE} RHOME
OUTPUT_VARIABLE R_BASE_DIR
OUTPUT_STRIP_TRAILING_WHITESPACE
)
# Get the R version.
execute_process(
COMMAND ${R_EXECUTABLE} --version
OUTPUT_VARIABLE R_VERSION_STRING
RESULT_VARIABLE RESULT
)
if (RESULT EQUAL 0)
string(REGEX REPLACE ".*([0-9]+\\.[0-9]+\\.[0-9]+).*" "\\1"
R_VERSION_STRING ${R_VERSION_STRING})
endif ()
set(R_HOME ${R_BASE_DIR} CACHE PATH "R home directory obtained from R RHOME")
mark_as_advanced(R_HOME)
endif()
# Find the Rscript program.
find_program(RSCRIPT_EXECUTABLE Rscript DOC "Rscript executable.")
set(CMAKE_FIND_APPBUNDLE ${TEMP_CMAKE_FIND_APPBUNDLE})
mark_as_advanced(RSCRIPT_EXECUTABLE R_EXECUTABLE)
set( _REQUIRED_R_VARIABLES R_EXECUTABLE )
include( FindPackageHandleStandardArgs )
find_package_handle_standard_args(
R
REQUIRED_VARS ${_REQUIRED_R_VARIABLES}
VERSION_VAR R_VERSION_STRING
FAIL_MESSAGE "R not found"
)
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