OVMS3-idf/tools/cmake/component_utils.cmake

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CMake
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# Given a component name (find_name) and a list of component paths (component_paths),
# return the path to the component in 'variable'
#
# Fatal error is printed if the component is not found.
function(find_component_path find_name components component_paths variable)
list(FIND components ${find_name} idx)
if(NOT idx EQUAL -1)
list(GET component_paths ${idx} path)
set("${variable}" "${path}" PARENT_SCOPE)
return()
else()
endif()
# TODO: find a way to print the dependency chain that lead to this not-found component
message(WARNING "Required component ${find_name} is not found in any of the provided COMPONENT_DIRS")
endfunction()
# components_find_all: Search 'component_dirs' for components and return them
# as a list of names in 'component_names' and a list of full paths in
# 'component_paths'
#
# component_paths contains only unique component names. Directories
# earlier in the component_dirs list take precedence.
function(components_find_all component_dirs component_paths component_names test_component_names)
# component_dirs entries can be files or lists of files
set(paths "")
set(names "")
set(test_names "")
# start by expanding the component_dirs list with all subdirectories
foreach(dir ${component_dirs})
# Iterate any subdirectories for values
file(GLOB subdirs LIST_DIRECTORIES true "${dir}/*")
foreach(subdir ${subdirs})
set(component_dirs "${component_dirs};${subdir}")
endforeach()
endforeach()
# Look for a component in each component_dirs entry
foreach(dir ${component_dirs})
debug("Looking for CMakeLists.txt in ${dir}")
file(GLOB component "${dir}/CMakeLists.txt")
if(component)
debug("CMakeLists.txt file ${component}")
get_filename_component(component "${component}" DIRECTORY)
get_filename_component(name "${component}" NAME)
if(NOT name IN_LIST names)
list(APPEND names "${name}")
list(APPEND paths "${component}")
# Look for test component directory
file(GLOB test "${component}/test/CMakeLists.txt")
if(test)
list(APPEND test_names "${name}")
endif()
endif()
else() # no CMakeLists.txt file
# test for legacy component.mk and warn
file(GLOB legacy_component "${dir}/component.mk")
if(legacy_component)
get_filename_component(legacy_component "${legacy_component}" DIRECTORY)
message(WARNING "Component ${legacy_component} contains old-style component.mk but no CMakeLists.txt. "
"Component will be skipped.")
endif()
endif()
endforeach()
set(${component_paths} ${paths} PARENT_SCOPE)
set(${component_names} ${names} PARENT_SCOPE)
set(${test_component_names} ${test_names} PARENT_SCOPE)
endfunction()