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Add find_package overrides that also work in CONFIG mode (#498) (#604)

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Patrick Stewart
2024-12-21 00:38:22 +09:00
committed by GitHub
parent 0bc73f41ce
commit 9ddfe1b6a8
5 changed files with 60 additions and 23 deletions
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25
cmake/CPM.cmake
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@@ -162,7 +162,7 @@ set(CPM_SOURCE_CACHE
CACHE PATH "Directory to download CPM dependencies"
)
if(NOT CPM_DONT_UPDATE_MODULE_PATH)
if(NOT CPM_DONT_UPDATE_MODULE_PATH AND NOT DEFINED CMAKE_FIND_PACKAGE_REDIRECTS_DIR)
set(CPM_MODULE_PATH
"${CMAKE_BINARY_DIR}/CPM_modules"
CACHE INTERNAL ""
@@ -269,10 +269,25 @@ endfunction()
# finding the system library
function(cpm_create_module_file Name)
if(NOT CPM_DONT_UPDATE_MODULE_PATH)
# erase any previous modules
file(WRITE ${CPM_MODULE_PATH}/Find${Name}.cmake
"include(\"${CPM_FILE}\")\n${ARGN}\nset(${Name}_FOUND TRUE)"
)
if(DEFINED CMAKE_FIND_PACKAGE_REDIRECTS_DIR)
# Redirect find_package calls to the CPM package. This is what FetchContent does when you set
# OVERRIDE_FIND_PACKAGE. The CMAKE_FIND_PACKAGE_REDIRECTS_DIR works for find_package in CONFIG
# mode, unlike the Find${Name}.cmake fallback. CMAKE_FIND_PACKAGE_REDIRECTS_DIR is not defined
# in script mode, or in CMake < 3.24.
# https://cmake.org/cmake/help/latest/module/FetchContent.html#fetchcontent-find-package-integration-examples
string(TOLOWER ${Name} NameLower)
file(WRITE ${CMAKE_FIND_PACKAGE_REDIRECTS_DIR}/${NameLower}-config.cmake
"include(\"${CMAKE_CURRENT_LIST_DIR}/${NameLower}-extra.cmake\" OPTIONAL)\n"
"include(\"${CMAKE_CURRENT_LIST_DIR}/${Name}Extra.cmake\" OPTIONAL)\n"
)
file(WRITE ${CMAKE_FIND_PACKAGE_REDIRECTS_DIR}/${NameLower}-version.cmake
"set(PACKAGE_VERSION_COMPATIBLE TRUE)\n" "set(PACKAGE_VERSION_EXACT TRUE)\n"
)
else()
file(WRITE ${CPM_MODULE_PATH}/Find${Name}.cmake
"include(\"${CPM_FILE}\")\n${ARGN}\nset(${Name}_FOUND TRUE)"
)
endif()
endif()
endfunction()