FeatureSummary module: how to get all dependency libraries of a Target and their versions?

Code
1

I want to get the list of all dependency libraries and their versions of a target.

This should be possible for imported targets and for build targets.

For imported targets ist works, but I am wondering that the version is only available with non namespace target name?

add_executable(main main.cpp)

target_link_libraries(
  main dependency ns::namespaced_dependency transitive_dependency::transitive_dependency
)

enable_testing()
add_test(NAME test COMMAND main)

include(FeatureSummary.cmake)
feature_summary(
  WHAT REQUIRED_PACKAGES_FOUND
  QUIET_ON_EMPTY
  DESCRIPTION ""
  FILENAME ${CMAKE_CURRENT_SOURCE_DIR}/RequiredPackagesFound.log
)

# Claus-iMac:test clausklein$ cat RequiredPackagesFound.log
# * dependency (required version >= 1.2)
# * namespaced_dependency (required version >= 4.5.6)
# * transitive_dependency (required version >= 7.8.9)

set(current_targets main)
get_property(
  _depends
  TARGET ${current_targets}
  PROPERTY INTERFACE_LINK_LIBRARIES
)
message(STATUS "${current_targets}: ${_depends}\n")

set(_property "PACKAGES_FOUND")
set(_currentFeatureText "")
get_property(_EnabledFeatures GLOBAL PROPERTY ${_property})
if(_EnabledFeatures)
  list(REMOVE_DUPLICATES _EnabledFeatures)
endif()
message(STATUS "${_property}: ${_EnabledFeatures}")

set(_currentFeature PACKAGES_FOUND)
get_property(
  _importedTargets
  DIRECTORY ${CMAKE_CURRENT_SORUCE_DIR}
  PROPERTY IMPORTED_TARGETS
)
foreach(_target ${_importedTargets})
  list(FIND _depends ${_target} _indexInList)
  if(NOT "${_indexInList}" STREQUAL "-1")
    # NOTE: we need the unalias target name! CK
    string(REGEX REPLACE "([^:]+::)" "" _targetName ${_target})

    get_property(_version GLOBAL PROPERTY _CMAKE_${_targetName}_REQUIRED_VERSION)
    message(STATUS "IMPORTED_TARGETS: ${_targetName} ${_version}")
  endif()
endforeach()

# _CMAKE_dependency_REQUIRED_VERSION: >= 1.2
# _CMAKE_namespaced_dependency_REQUIRED_VERSION: >= 4.5.6
# _CMAKE_transitive_dependency_REQUIRED_VERSION: >= 7.8.9
# -- main: dependency;ns::namespaced_dependency;transitive_dependency::transitive_dependency
#
# -- PACKAGES_FOUND: dependency;namespaced_dependency;fmt;cxxopts;transitive_dependency
# -- IMPORTED_TARGETS: dependency >= 1.2
# -- IMPORTED_TARGETS: namespaced_dependency >= 4.5.6
# -- IMPORTED_TARGETS: transitive_dependency >= 7.8.9
2

Alias targets act a little weird. See this issue:

https://gitlab.kitware.com/cmake/cmake/-/issues/19445

3

but this are imported targets:

  find_package(dependency 1.2.3 REQUIRED)
  find_package(namespaced_dependency 4.5.6 REQUIRED)
  find_package(transitive_dependency 7.8.9 REQUIRED)
4

It seems I misunderstood the question then. I’m not that familiar with FeatureSummary.cmake myself, so someone else may have an answer.