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cmake: Only rewrite componend_depends.cmake if it changes

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Angus Gratton
2018-08-10 12:30:32 +10:00
committed by Angus Gratton
parent 70288f864e
commit 48bd67524d
1 changed files with 6 additions and 2 deletions
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8
tools/cmake/scripts/expand_requirements.cmake
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@@ -184,10 +184,10 @@ debug("components in build: ${build_component_paths}")
debug("components not found: ${not_found}")
function(line contents)
file(APPEND "${DEPENDENCIES_FILE}" "${contents}\n")
file(APPEND "${DEPENDENCIES_FILE}.tmp" "${contents}\n")
endfunction()
file(WRITE "${DEPENDENCIES_FILE}" "# Component requirements generated by expand_requirements.cmake\n\n")
file(WRITE "${DEPENDENCIES_FILE}.tmp" "# Component requirements generated by expand_requirements.cmake\n\n")
line("set(BUILD_COMPONENTS ${build_components})")
line("set(BUILD_COMPONENT_PATHS ${build_component_paths})")
line("")
@@ -216,3 +216,7 @@ endforeach()
line(" message(FATAL_ERROR \"Component not found: \${component}\")")
line("endfunction()")
# only replace DEPENDENCIES_FILE if it has changed (prevents ninja/make build loops.)
execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different "${DEPENDENCIES_FILE}.tmp" "${DEPENDENCIES_FILE}")
execute_process(COMMAND ${CMAKE_COMMAND} -E remove "${DEPENDENCIES_FILE}.tmp")