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cmake_policy(SET CMP0169 OLD)
include(FetchContent)
# Test using saved details
FetchContent_Declare(
t1
SOURCE_DIR ${CMAKE_CURRENT_BINARY_DIR}/savedSrc
BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/savedBin
DOWNLOAD_COMMAND ${CMAKE_COMMAND} -E make_directory <SOURCE_DIR> <BINARY_DIR>
)
FetchContent_Populate(t1)
if(NOT IS_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/savedSrc)
message(FATAL_ERROR "Saved details SOURCE_DIR override failed")
endif()
if(NOT IS_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/savedBin)
message(FATAL_ERROR "Saved details BINARY_DIR override failed")
endif()
# Test direct population
FetchContent_Populate(
t2
SOURCE_DIR ${CMAKE_CURRENT_BINARY_DIR}/directSrc
BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/directBin
DOWNLOAD_COMMAND ${CMAKE_COMMAND} -E make_directory <SOURCE_DIR> <BINARY_DIR>
)
if(NOT IS_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/directSrc)
message(FATAL_ERROR "Direct details SOURCE_DIR override failed")
endif()
# Ensure setting BINARY_DIR to SOURCE_DIR works (a technique to
# prevent an unwanted separate BINARY_DIR from being created, which
# ExternalProject_Add() does whether we like it or not)
FetchContent_Declare(
t3
SOURCE_DIR ${CMAKE_CURRENT_BINARY_DIR}/savedNoBuildDir
BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/savedNoBuildDir
DOWNLOAD_COMMAND ${CMAKE_COMMAND} -E make_directory <SOURCE_DIR>
)
FetchContent_Populate(t3)
if(IS_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/savedNobuildDir-build)
message(FATAL_ERROR "Saved details BINARY_DIR override failed")
endif()
FetchContent_Populate(
t4
SOURCE_DIR ${CMAKE_CURRENT_BINARY_DIR}/directNoBuildDir
BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/directNoBuildDir
DOWNLOAD_COMMAND ${CMAKE_COMMAND} -E make_directory <SOURCE_DIR>
)
if(IS_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/savedNobuildDir-build)
message(FATAL_ERROR "Direct details BINARY_DIR override failed")
endif()
# Test overriding the source directory by reusing the one from t1
set(FETCHCONTENT_SOURCE_DIR_T5 ${CMAKE_CURRENT_BINARY_DIR}/savedSrc)
FetchContent_Declare(
t5
SOURCE_DIR ${CMAKE_CURRENT_BINARY_DIR}/doesNotExist
BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/wontBeCreated
DOWNLOAD_COMMAND ${CMAKE_COMMAND} -E false
)
FetchContent_Populate(t5)
if(NOT "${t5_SOURCE_DIR}" STREQUAL "${CMAKE_CURRENT_BINARY_DIR}/savedSrc")
message(FATAL_ERROR "Wrong SOURCE_DIR returned: ${t5_SOURCE_DIR}")
endif()
if(NOT "${t5_BINARY_DIR}" STREQUAL "${CMAKE_CURRENT_BINARY_DIR}/wontBeCreated")
message(FATAL_ERROR "Wrong BINARY_DIR returned: ${t5_BINARY_DIR}")
endif()
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