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| author | Alexis Murzeau <amubtdx@gmail.com> | 2020-04-29 22:09:45 +0200 |
|---|---|---|
| committer | Alexis Murzeau <amubtdx@gmail.com> | 2020-05-11 22:36:30 +0000 |
| commit | a9aa5612345bcfae9a5562e135dec9de8c3b8a8f (patch) | |
| tree | c668c7584982785c8eca076e759c9c89ea6b3236 /cmake | |
| parent | 95d9eafc8a6bbd21f0bcde0274d2ec100d6f386b (diff) | |
CMake: copy clang and resource files only if necessary
Uses a timestamp file in the build directory to detect when the input
changes using DEPENDS from add_custom_command.
Total copied files size sum up to more than 260 MB. This was copied at every
incremental build, even if nothing changed.
This leads to faster build, especially when the copied files are not
cached in RAM or when not using a SSD.
Change-Id: I3a0b691b961e1d8591068bacf40ae2467c8637cf
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
Reviewed-by: Cristian Adam <cristian.adam@qt.io>
Diffstat (limited to 'cmake')
| -rw-r--r-- | cmake/QtCreatorAPI.cmake | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/cmake/QtCreatorAPI.cmake b/cmake/QtCreatorAPI.cmake index d88cff2fc6..4351c897f7 100644 --- a/cmake/QtCreatorAPI.cmake +++ b/cmake/QtCreatorAPI.cmake @@ -1155,3 +1155,49 @@ function(qtc_glob_resources) string(APPEND qrcData "</qresource></RCC>") file(WRITE "${_arg_QRC_FILE}" "${qrcData}") endfunction() + +function(qtc_copy_to_builddir custom_target_name) + cmake_parse_arguments(_arg "CREATE_SUBDIRS" "DESTINATION" "FILES;DIRECTORIES" ${ARGN}) + set(timestampFiles) + + qtc_output_binary_dir(_output_binary_dir) + + foreach(srcFile ${_arg_FILES}) + string(MAKE_C_IDENTIFIER "${srcFile}" destinationTimestampFilePart) + set(destinationTimestampFileName "${CMAKE_CURRENT_BINARY_DIR}/.${destinationTimestampFilePart}_timestamp") + list(APPEND timestampFiles "${destinationTimestampFileName}") + + add_custom_command(OUTPUT "${destinationTimestampFileName}" + COMMAND "${CMAKE_COMMAND}" -E make_directory "${_output_binary_dir}/${_arg_DESTINATION}" + COMMAND "${CMAKE_COMMAND}" -E copy "${srcFile}" "${_output_binary_dir}/${_arg_DESTINATION}" + COMMAND "${CMAKE_COMMAND}" -E touch "${destinationTimestampFileName}" + WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}" + COMMENT "Copy ${srcFile} into build directory" + DEPENDS "${srcFile}" + VERBATIM + ) + endforeach() + + foreach(srcDirectory ${_arg_DIRECTORIES}) + string(MAKE_C_IDENTIFIER "${srcDirectory}" destinationTimestampFilePart) + set(destinationTimestampFileName "${CMAKE_CURRENT_BINARY_DIR}/.${destinationTimestampFilePart}_timestamp") + list(APPEND timestampFiles "${destinationTimestampFileName}") + set(destinationDirectory "${_output_binary_dir}/${_arg_DESTINATION}") + + if(_arg_CREATE_SUBDIRS) + set(destinationDirectory "${destinationDirectory}/${srcDirectory}") + endif() + + file(GLOB_RECURSE filesToCopy "${srcDirectory}/*") + add_custom_command(OUTPUT "${destinationTimestampFileName}" + COMMAND "${CMAKE_COMMAND}" -E copy_directory "${srcDirectory}" "${destinationDirectory}" + COMMAND "${CMAKE_COMMAND}" -E touch "${destinationTimestampFileName}" + WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}" + COMMENT "Copy ${srcDirectory}/ into build directory" + DEPENDS ${filesToCopy} + VERBATIM + ) + endforeach() + + add_custom_target("${custom_target_name}" ALL DEPENDS ${timestampFiles}) +endfunction() |