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 # SPDX-FileCopyrightText: 2019 Christoph Cullmann <cullmann@kde.org>
 # SPDX-FileCopyrightText: 2021 Alexander Lohnau <alexander.lohnau@gmx.de>
 #
 # SPDX-License-Identifier: BSD-3-Clause
 
 #[=======================================================================[.rst:
 KDEClangFormat
 --------------------
 
 This module provides a functionality to format the source
 code of your repository according to a predefined KDE
 clang-format file.
 
 This module provides the following function:
 
 ::
 
   kde_clang_format(<files>)
 
 Using this function will create a clang-format target that will format all
 ``<files>`` passed to the function with the predefined KDE clang-format style.
 To format the files you have to invoke the target with ``make clang-format`` or ``ninja clang-format``.
 Once the project is formatted it is recommended to enforce the formatting using a pre-commit hook,
 this can be done using :kde-module:`KDEGitCommitHooks`.
 
 The ``.clang-format`` file from ECM will be copied to the source directory. This file should not be
 added to version control. It is recommended to add it to the ``.gitignore`` file: ``/.clang-format``.
 
 Since 5.79: If the source folder already contains a .clang-format file it is not overwritten.
 Since version 5.80 this function is called by default in :kde-module:`KDEFrameworkCompilerSettings`. If directories should be excluded from
 the formatting a .clang-format file with ``DisableFormat: true`` and ``SortIncludes: false`` should be created.
 
 Example usage:
 
 .. code-block:: cmake
 
   include(KDEClangFormat)
   file(GLOB_RECURSE ALL_CLANG_FORMAT_SOURCE_FILES *.cpp *.h *.hpp *.c)
   kde_clang_format(${ALL_CLANG_FORMAT_SOURCE_FILES})
 
 To exclude directories from the formatting add a ``.clang-format``
 file in the directory with the following contents:
 
 .. code-block:: yaml
 
    DisableFormat: true
    SortIncludes: false
 
 Since 5.64
 #]=======================================================================]
 
 # try to find clang-format in path
 find_program(KDE_CLANG_FORMAT_EXECUTABLE clang-format)
 
 # instantiate our clang-format file, must be in source directory for tooling if we have the tool
 if(KDE_CLANG_FORMAT_EXECUTABLE)
     set(CLANG_FORMAT_FILE ${CMAKE_CURRENT_SOURCE_DIR}/.clang-format)
     if (EXISTS ${CLANG_FORMAT_FILE})
         file(READ ${CLANG_FORMAT_FILE} CLANG_FORMAT_CONTENTS LIMIT 1000)
         string(FIND "${CLANG_FORMAT_CONTENTS}" "This file got automatically created by ECM, do not edit" matchres)
         if(${matchres} EQUAL -1)
             message(WARNING "The .clang-format file already exists. Please remove it in order to use the file provided by ECM")
         else()
             configure_file(${CMAKE_CURRENT_LIST_DIR}/clang-format.in ${CLANG_FORMAT_FILE} @ONLY)
         endif()
     else()
         configure_file(${CMAKE_CURRENT_LIST_DIR}/clang-format.in ${CLANG_FORMAT_FILE} @ONLY)
     endif()
 endif()
 
 # formatting target
 function(KDE_CLANG_FORMAT)
     if (TARGET clang-format)
         message(WARNING "the kde_clang_format function was already called")
         return()
     endif()
 
     # add target without specific commands first, we add the real calls file-per-file to avoid command line length issues
     add_custom_target(clang-format COMMENT "Formatting sources in ${CMAKE_CURRENT_SOURCE_DIR} with ${KDE_CLANG_FORMAT_EXECUTABLE}...")
 
     # run clang-format only if available, else signal the user what is missing
     if(KDE_CLANG_FORMAT_EXECUTABLE)
         get_filename_component(_binary_dir ${CMAKE_BINARY_DIR} REALPATH)
         foreach(_file ${ARGV})
             # check if the file is inside the build directory => ignore such files
             get_filename_component(_full_file_path ${_file} REALPATH)
             string(FIND ${_full_file_path} ${_binary_dir} _index)
             if(NOT _index EQUAL 0)
                 add_custom_command(TARGET clang-format
                     COMMAND
                         ${KDE_CLANG_FORMAT_EXECUTABLE}
                         -style=file
                         -i
                         ${_full_file_path}
                     WORKING_DIRECTORY
                         ${CMAKE_CURRENT_SOURCE_DIR}
                     COMMENT
                         "Formatting ${_full_file_path}..."
                     )
             endif()
         endforeach()
     else()
         add_custom_command(TARGET clang-format
             COMMAND
                 ${CMAKE_COMMAND} -E echo "Could not set up the clang-format target as the clang-format executable is missing."
             )
     endif()
 endfunction()