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# Copyright (C) 2023 The Qt Company Ltd.
# SPDX-License-Identifier: BSD-3-Clause
cmake_minimum_required(VERSION 3.16)
if(NOT PROJECT_DIR)
set(PROJECT_DIR "${CMAKE_SOURCE_DIR}")
endif()
get_filename_component(project_name "${PROJECT_DIR}" NAME)
get_filename_component(project_abs_dir "${PROJECT_DIR}" ABSOLUTE)
if(NOT IS_DIRECTORY "${project_abs_dir}")
message(FATAL_ERROR "Unable to scan ${project_abs_dir}. The directory doesn't exist.")
endif()
set(known_extensions "")
set(types "")
# The function allows extending the capabilities of this script and establishes simple relation
# chains between the file types.
# Option Arguments:
# EXPERIMENTAL
# Marks that the support of the following files is experimental and the required Qt modules
# are in Technical preview state.
# DEPRECATED
# Marks that the support of the following files will be discontinued soon and the required
# Qt modules are deprecated.
# One-value Arguments:
# TEMPLATE
# The CMake code template. Use the '@files@' string for the files substitution.
# Multi-value Arguments:
# EXTENSIONS
# List of the file extensions treated as this source 'type'.
# MODULES
# List of Qt modules required for these file types.
# DEPENDS
# The prerequisite source 'type' needed by this source 'type'
macro(handle_type type)
cmake_parse_arguments(arg
"EXPERIMENTAL;DEPRECATED"
"TEMPLATE"
"EXTENSIONS;MODULES;DEPENDS"
${ARGN}
)
if(NOT arg_EXTENSIONS)
message(FATAL_ERROR "Unexpected call handle_type of with no EXTENSIONS specified."
" This is the Qt issue, please report a bug at https://bugreports.qt.io.")
endif()
set(unique_extensions_subset "${known_extensions}")
list(REMOVE_ITEM unique_extensions_subset ${arg_EXTENSIONS})
if(NOT "${known_extensions}" STREQUAL "${unique_extensions_subset}")
message(FATAL_ERROR "${type} contains duplicated extensions, this is not supported."
" This is the Qt issue, please report a bug at https://bugreports.qt.io.")
endif()
set(${type}_file_extensions "${arg_EXTENSIONS}")
if(NOT arg_TEMPLATE)
message(FATAL_ERROR "Unexpected call handle_type of with no TEMPLATE specified."
" This is the Qt issue, please report a bug at https://bugreports.qt.io.")
endif()
set(${type}_template "${arg_TEMPLATE}")
if(arg_MODULES)
set(${type}_required_modules "${arg_MODULES}")
endif()
list(APPEND types ${type})
if(arg_EXPERIMENTAL)
set(${type}_is_experimental TRUE)
else()
set(${type}_is_experimental FALSE)
endif()
if(arg_DEPRECATED)
set(${type}_is_deprecated TRUE)
else()
set(${type}_is_deprecated FALSE)
endif()
if(arg_DEPENDS)
set(${type}_dependencies ${arg_DEPENDS})
endif()
endmacro()
handle_type(cpp EXTENSIONS .c .cc .cpp .cxx .h .hh .hxx .hpp MODULES Core TEMPLATE
"\n\nqt_add_executable(${project_name}
@files@
)"
)
handle_type(qml EXTENSIONS .qml .js .mjs MODULES Gui Qml Quick TEMPLATE
"\n\nqt_add_qml_module(${project_name}
URI ${project_name}
OUTPUT_DIRECTORY qml
VERSION 1.0
RESOURCE_PREFIX /qt/qml
QML_FILES
@files@
)"
)
handle_type(ui EXTENSIONS .ui MODULES Gui Widgets DEPENDS cpp TEMPLATE
"\n\ntarget_sources(${project_name}
PRIVATE
@files@
)"
)
handle_type(qrc EXTENSIONS .qrc DEPENDS cpp TEMPLATE
"\n\nqt_add_resources(${project_name}_resources @files@)
target_sources(${project_name}
PRIVATE
\\\${${project_name}_resources}
)"
)
handle_type(protobuf EXPERIMENTAL EXTENSIONS .proto MODULES Protobuf Grpc TEMPLATE
"\n\nqt_add_protobuf(${project_name}
GENERATE_PACKAGE_SUBFOLDERS
PROTO_FILES
@files@
)"
)
set(extra_packages "")
file(GLOB_RECURSE files RELATIVE "${project_abs_dir}" "${project_abs_dir}/*")
foreach(f IN LISTS files)
get_filename_component(file_extension "${f}" LAST_EXT)
string(TOLOWER "${file_extension}" file_extension)
foreach(type IN LISTS types)
if(file_extension IN_LIST ${type}_file_extensions)
list(APPEND ${type}_sources "${f}")
list(APPEND packages ${${type}_required_modules})
if(${type}_is_experimental)
message("We found files with the following extensions in your directory:"
" ${${type}_file_extensions}\n"
"Note that the modules ${${type}_required_modules} are"
" in the technical preview state.")
endif()
if(${type}_is_deprecated)
message("We found files with the following extensions in your directory:"
" ${${type}_file_extensions}\n"
"Note that the modules ${${type}_required_modules} are deprecated.")
endif()
break()
endif()
endforeach()
endforeach()
if(packages)
list(REMOVE_DUPLICATES packages)
list(JOIN packages " " packages_string)
list(JOIN packages "\n Qt::" deps_string)
set(deps_string "Qt::${deps_string}")
endif()
set(content
"cmake_minimum_required(VERSION 3.16)
project(${project_name} LANGUAGES CXX)
find_package(Qt6 REQUIRED COMPONENTS ${packages_string})
qt_standard_project_setup()"
)
set(has_useful_sources FALSE)
foreach(type IN LISTS types)
if(${type}_sources)
set(skip FALSE)
foreach(dep IN LISTS ${type}_dependencies)
if(NOT ${dep}_sources)
set(skip TRUE)
message("Sources of type ${${type}_file_extensions} cannot live in the project"
" without ${${dep}_file_extensions} files. Skipping.")
break()
endif()
endforeach()
if(skip)
continue()
endif()
set(has_useful_sources TRUE)
string(REGEX MATCH "( +)@files@" unused "${${type}_template}")
list(JOIN ${type}_sources "\n${CMAKE_MATCH_1}" ${type}_sources)
string(REPLACE "@files@" "${${type}_sources}" ${type}_content
"${${type}_template}")
string(APPEND content "${${type}_content}")
endif()
endforeach()
string(APPEND content "\n\ntarget_link_libraries(${project_name}
PRIVATE
${deps_string}
)\n"
)
if(EXISTS "${project_abs_dir}/CMakeLists.txt")
message(FATAL_ERROR "Project is already initialized in current directory."
" Please remove CMakeLists.txt if you want to regenerate the project.")
endif()
if(NOT has_useful_sources)
message(FATAL_ERROR "Could not find any files to generate the project.")
endif()
file(WRITE "${project_abs_dir}/CMakeLists.txt" "${content}")
message("The project file is successfully generated. To build the project run:"
"\nmkdir build"
"\ncd build"
"\nqt-cmake ${project_abs_dir}"
"\ncmake --build ${project_abs_dir}"
)
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