BadQuanta
92 lines
2.8 KiB
CMake
92 lines
2.8 KiB
CMake
include(CMakeParseArguments)
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# Resolve a dependency in this order:
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# 1) already-defined target(s)
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# 2) find_package() system package(s)
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# 3) FetchContent fallback
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function(hdk_resolve_dependency)
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set(_opts "")
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set(_one_value NAME MIN_VERSION USE_SYSTEM FETCH_FALLBACK GIT_REPOSITORY GIT_TAG FETCHCONTENT_NAME OUT_VAR)
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set(_multi_value TARGETS PACKAGE_NAMES)
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cmake_parse_arguments(HDK_DEP "${_opts}" "${_one_value}" "${_multi_value}" ${ARGN})
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if(NOT HDK_DEP_NAME)
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message(FATAL_ERROR "hdk_resolve_dependency requires NAME")
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endif()
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if(NOT HDK_DEP_TARGETS)
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message(FATAL_ERROR "hdk_resolve_dependency(${HDK_DEP_NAME}) requires TARGETS")
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endif()
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if(NOT HDK_DEP_FETCHCONTENT_NAME)
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message(FATAL_ERROR "hdk_resolve_dependency(${HDK_DEP_NAME}) requires FETCHCONTENT_NAME")
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endif()
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set(_hdk_dep_resolved_target "")
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foreach(_target IN LISTS HDK_DEP_TARGETS)
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if(TARGET ${_target})
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set(_hdk_dep_resolved_target ${_target})
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break()
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endif()
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endforeach()
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if(NOT _hdk_dep_resolved_target AND HDK_DEP_USE_SYSTEM)
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foreach(_pkg IN LISTS HDK_DEP_PACKAGE_NAMES)
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if(HDK_DEP_MIN_VERSION)
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find_package(${_pkg} ${HDK_DEP_MIN_VERSION} QUIET CONFIG)
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else()
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find_package(${_pkg} QUIET CONFIG)
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endif()
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foreach(_target IN LISTS HDK_DEP_TARGETS)
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if(TARGET ${_target})
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set(_hdk_dep_resolved_target ${_target})
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break()
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endif()
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endforeach()
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if(_hdk_dep_resolved_target)
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break()
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endif()
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endforeach()
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endif()
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if(NOT _hdk_dep_resolved_target)
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if(NOT HDK_DEP_FETCH_FALLBACK)
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if(HDK_DEP_MIN_VERSION)
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message(FATAL_ERROR "${HDK_DEP_NAME} >= ${HDK_DEP_MIN_VERSION} not found and fallback is disabled")
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else()
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message(FATAL_ERROR "${HDK_DEP_NAME} not found and fallback is disabled")
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endif()
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endif()
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if(NOT HDK_DEP_GIT_REPOSITORY)
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message(FATAL_ERROR "hdk_resolve_dependency(${HDK_DEP_NAME}) fallback requires GIT_REPOSITORY")
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endif()
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if(NOT HDK_DEP_GIT_TAG)
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message(FATAL_ERROR "hdk_resolve_dependency(${HDK_DEP_NAME}) fallback requires GIT_TAG")
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endif()
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include(FetchContent)
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FetchContent_Declare(
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${HDK_DEP_FETCHCONTENT_NAME}
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GIT_REPOSITORY ${HDK_DEP_GIT_REPOSITORY}
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GIT_TAG ${HDK_DEP_GIT_TAG}
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)
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FetchContent_MakeAvailable(${HDK_DEP_FETCHCONTENT_NAME})
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foreach(_target IN LISTS HDK_DEP_TARGETS)
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if(TARGET ${_target})
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set(_hdk_dep_resolved_target ${_target})
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break()
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endif()
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endforeach()
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endif()
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if(NOT _hdk_dep_resolved_target)
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message(FATAL_ERROR "${HDK_DEP_NAME} could not be resolved to any expected target: ${HDK_DEP_TARGETS}")
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endif()
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if(HDK_DEP_OUT_VAR)
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set(${HDK_DEP_OUT_VAR} ${_hdk_dep_resolved_target} PARENT_SCOPE)
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endif()
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endfunction()
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