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To make it easier to share find_package2 across projects let's move it into its own file.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,102 @@ | ||
| ################################################################################ | ||
| # Copyright (C) 2018-2021 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH # | ||
| # # | ||
| # This software is distributed under the terms of the # | ||
| # GNU Lesser General Public Licence (LGPL) version 3, # | ||
| # copied verbatim in the file "LICENSE" # | ||
| ################################################################################ | ||
|
|
||
| # | ||
| # find_package2(PRIVATE|PUBLIC|INTERFACE <pkgname> | ||
| # [VERSION <version>] | ||
| # [COMPONENTS <list of components>] | ||
| # [ADD_REQUIREMENTS_OF <list of dep_pgkname>] | ||
| # [any other option the native find_package supports]...) | ||
| # | ||
| # Wrapper around CMake's native find_package command to add some features and bookkeeping. | ||
| # | ||
| # The qualifier (PRIVATE|PUBLIC|INTERFACE) to the package to populate | ||
| # the variables PROJECT_[INTERFACE]_<pkgname>_([VERSION]|[COMPONENTS]|PACKAGE_DEPENDENCIES) | ||
| # accordingly. This bookkeeping information is used to print our dependency found summary | ||
| # table and to generate a part of our CMake package. | ||
| # | ||
| # When a dependending package is listed with ADD_REQUIREMENTS_OF the variables | ||
| # <dep_pkgname>_<pkgname>_VERSION|COMPONENTS are looked up to and added to the native | ||
| # VERSION (selected highest version) and COMPONENTS (deduplicated) args. | ||
| # | ||
| # COMPONENTS and VERSION args are then just passed to the native find_package. | ||
| # | ||
| macro(find_package2 qualifier pkgname) | ||
| cmake_parse_arguments(ARGS "" "VERSION" "COMPONENTS;ADD_REQUIREMENTS_OF" ${ARGN}) | ||
|
|
||
| string(TOUPPER ${pkgname} pkgname_upper) | ||
| set(__old_cpp__ ${CMAKE_PREFIX_PATH}) | ||
| set(CMAKE_PREFIX_PATH ${${pkgname_upper}_ROOT} $ENV{${pkgname_upper}_ROOT} ${CMAKE_PREFIX_PATH}) | ||
|
|
||
| # build lists of required versions and components | ||
| unset(__required_versions__) | ||
| unset(__components__) | ||
| if(ARGS_VERSION) | ||
| list(APPEND __required_versions__ ${ARGS_VERSION}) | ||
| endif() | ||
| if(ARGS_COMPONENTS) | ||
| list(APPEND __components__ ${ARGS_COMPONENTS}) | ||
| endif() | ||
| if(ARGS_ADD_REQUIREMENTS_OF) | ||
| foreach(dep_pkgname IN LISTS ARGS_ADD_REQUIREMENTS_OF) | ||
| if(${dep_pkgname}_${pkgname}_VERSION) | ||
| list(APPEND __required_versions__ ${${dep_pkgname}_${pkgname}_VERSION}) | ||
| endif() | ||
| if(${dep_pkgname}_${pkgname}_COMPONENTS) | ||
| list(APPEND __components__ ${${dep_pkgname}_${pkgname}_COMPONENTS}) | ||
| endif() | ||
| endforeach() | ||
| endif() | ||
|
|
||
| # select highest required version | ||
| unset(__version__) | ||
| if(__required_versions__) | ||
| list(GET __required_versions__ 0 __version__) | ||
| foreach(v IN LISTS __required_versions__) | ||
| if(${v} VERSION_GREATER ${__version__}) | ||
| set(__version__ ${v}) | ||
| endif() | ||
| endforeach() | ||
| endif() | ||
| # deduplicate required component list | ||
| if(__components__) | ||
| list(REMOVE_DUPLICATES ARGS_COMPONENTS) | ||
| endif() | ||
|
|
||
| # call native find_package | ||
| if(__components__) | ||
| find_package(${pkgname} ${__version__} QUIET COMPONENTS ${__components__} ${ARGS_UNPARSED_ARGUMENTS}) | ||
| else() | ||
| find_package(${pkgname} ${__version__} QUIET ${ARGS_UNPARSED_ARGUMENTS}) | ||
| endif() | ||
|
|
||
| if(${pkgname}_FOUND) | ||
| if(${qualifier} STREQUAL PRIVATE) | ||
| set(PROJECT_${pkgname}_VERSION ${__version__}) | ||
| set(PROJECT_${pkgname}_COMPONENTS ${ARGS_COMPONENTS}) | ||
| set(PROJECT_PACKAGE_DEPENDENCIES ${PROJECT_PACKAGE_DEPENDENCIES} ${pkgname}) | ||
| elseif(${qualifier} STREQUAL PUBLIC) | ||
| set(PROJECT_${pkgname}_VERSION ${__version__}) | ||
| set(PROJECT_${pkgname}_COMPONENTS ${ARGS_COMPONENTS}) | ||
| set(PROJECT_PACKAGE_DEPENDENCIES ${PROJECT_PACKAGE_DEPENDENCIES} ${pkgname}) | ||
| set(PROJECT_INTERFACE_${pkgname}_VERSION ${__version__}) | ||
| set(PROJECT_INTERFACE_${pkgname}_COMPONENTS ${ARGS_COMPONENTS}) | ||
| set(PROJECT_INTERFACE_PACKAGE_DEPENDENCIES ${PROJECT_INTERFACE_PACKAGE_DEPENDENCIES} ${pkgname}) | ||
| elseif(${qualifier} STREQUAL INTERFACE) | ||
| set(PROJECT_INTERFACE_${pkgname}_VERSION ${__version__}) | ||
| set(PROJECT_INTERFACE_${pkgname}_COMPONENTS ${ARGS_COMPONENTS}) | ||
| set(PROJECT_INTERFACE_PACKAGE_DEPENDENCIES ${PROJECT_INTERFACE_PACKAGE_DEPENDENCIES} ${pkgname}) | ||
| endif() | ||
| endif() | ||
|
|
||
| unset(__version__) | ||
| unset(__components__) | ||
| unset(__required_versions__) | ||
| set(CMAKE_PREFIX_PATH ${__old_cpp__}) | ||
| unset(__old_cpp__) | ||
| endmacro() |
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