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