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# This test checks whether a missing dependency of the moc output triggers an AUTOMOC re-run.
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cmake_minimum_required(VERSION 3.16)
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project(RerunMocOnMissingDependency)
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include("../AutogenCoreTest.cmake")
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# Create an executable to generate a clean target
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set(main_source "${CMAKE_CURRENT_BINARY_DIR}/generated_main.cpp")
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file(WRITE "${main_source}" "int main() {}")
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add_executable(exe "${main_source}")
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# Utility variables
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set(testProjectTemplateDir "${CMAKE_CURRENT_SOURCE_DIR}/MocOnMissingDependency")
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set(testProjectSrc "${CMAKE_CURRENT_BINARY_DIR}/MocOnMissingDependency")
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set(testProjectBinDir "${CMAKE_CURRENT_BINARY_DIR}/MocOnMissingDependency-build")
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if(DEFINED Qt${QT_TEST_VERSION}Core_VERSION AND Qt${QT_TEST_VERSION}Core_VERSION VERSION_GREATER_EQUAL "5.15.0")
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set(moc_depfiles_supported TRUE)
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else()
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set(moc_depfiles_supported FALSE)
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endif()
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# Utility macros
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macro(sleep)
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message(STATUS "Sleeping for a few seconds.")
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execute_process(COMMAND "${CMAKE_COMMAND}" -E sleep 1)
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endmacro()
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macro(rebuild buildName)
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message(STATUS "Starting build ${buildName}.")
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execute_process(COMMAND "${CMAKE_COMMAND}" --build . WORKING_DIRECTORY "${testProjectBinDir}"
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RESULT_VARIABLE result OUTPUT_VARIABLE output)
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if (result)
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message(FATAL_ERROR "Build ${buildName} failed.")
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else()
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message(STATUS "Build ${buildName} finished.")
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endif()
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endmacro()
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# Create the test project from the template
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file(COPY "${testProjectTemplateDir}" DESTINATION "${CMAKE_CURRENT_BINARY_DIR}")
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configure_file("${testProjectTemplateDir}/CMakeLists.txt.in" "${testProjectSrc}/CMakeLists.txt" @ONLY)
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# Initial build
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file(REMOVE_RECURSE "${testProjectBinDir}")
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try_compile(MOC_RERUN
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"${testProjectBinDir}"
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"${testProjectSrc}"
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MocOnMissingDependency
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CMAKE_FLAGS "-DQT_TEST_VERSION=${QT_TEST_VERSION}"
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"-DCMAKE_AUTOGEN_VERBOSE=ON"
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"-DCMAKE_PREFIX_PATH:STRING=${CMAKE_PREFIX_PATH}"
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"-DQT_QMAKE_EXECUTABLE:FILEPATH=${QT_QMAKE_EXECUTABLE}"
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OUTPUT_VARIABLE output
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)
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if (NOT MOC_RERUN)
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message(FATAL_ERROR "Initial build of mocOnMissingDependency failed. Output: ${output}")
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endif()
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# Sleep to ensure new timestamps
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sleep()
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if(moc_depfiles_supported)
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# Remove the dependency inc1/foo.h and build again.
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# We expect that the moc_XXX.cpp file gets re-generated. But only if we have depfile support.
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file(REMOVE_RECURSE "${testProjectSrc}/inc1")
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rebuild(2)
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if(NOT output MATCHES "AutoMoc: Generating \"[^\"]*moc_myobject.cpp\"")
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message(FATAL_ERROR "moc_myobject.cpp was not re-generated "
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"after removing one of its dependencies")
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endif()
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endif()
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# Sleep to ensure new timestamps
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sleep()
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# The next build should *not* re-renerate any moc outputs
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rebuild(3)
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if(output MATCHES "AutoMoc: Generating")
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message(FATAL_ERROR "moc_myobject.cpp was not re-generated "
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"after removing one of its dependencies")
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endif()
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