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# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: BSD-3-Clause
# Generate an lupdate project file in JSON format.
#
# This file is to be used in CMake script mode with the following variables set:
#
# IN_FILE: .cmake file that sets lupdate_* variables
# OUT_FILE: lupdate project .json file
include("${IN_FILE}")
# Converts a CMake list into a string containing a JSON array
# a,b,c -> [ "a", "b", "c" ]
function(list_to_json_array srcList jsonList)
set(quotedList "")
foreach(entry ${srcList})
list(APPEND quotedList "\"${entry}\"")
endforeach()
list(JOIN quotedList ", " joinedList)
set(${jsonList} "[ ${joinedList} ]" PARENT_SCOPE)
endfunction()
# Remove all nonexistent files from ARGN and store the result in out_var.
# filter_nonexistent_files(existing_files foo.txt bar.cpp)
# -> foo.txt (if foo.txt exists and bar.cpp does not)
function(filter_nonexistent_files out_var)
# Filter out non-existent (generated) source files
set(existing_sources "")
foreach(path IN LISTS ARGN)
if(EXISTS "${path}")
list(APPEND existing_sources "${path}")
endif()
endforeach()
set("${out_var}" "${existing_sources}" PARENT_SCOPE)
endfunction()
# Remove source files that are unsuitable input for lupdate.
# filter_unsuitable_lupdate_input(sources main.cpp foo_de.qm bar.qml whatever_metatypes.json)
# -> main.cpp bar.qml
function(filter_unsuitable_lupdate_input out_var)
set(result ${ARGN})
list(FILTER result EXCLUDE REGEX "\\.(qm|json)$")
set("${out_var}" "${result}" PARENT_SCOPE)
endfunction()
# Remove ui_foo.h for each foo.ui file found in the sources.
# filter_generated_ui_headers(existing_files .../src/foo.ui .../target_autogen/include/ui_foo.h)
# -> .../src/foo.ui
function(filter_generated_ui_headers out_var)
set(ui_file_paths ${ARGN})
list(FILTER ui_file_paths INCLUDE REGEX "/[^/]+\\.ui$")
set(filter_regex "")
foreach(file_path IN LISTS ui_file_paths)
get_filename_component(file_name "${file_path}" NAME_WLE)
if(NOT "${filter_regex}" STREQUAL "")
string(APPEND filter_regex "|")
endif()
string(APPEND filter_regex "(/ui_${file_name}\\.h$)")
endforeach()
set(result ${ARGN})
if(NOT "${filter_regex}" STREQUAL "")
list(FILTER result EXCLUDE REGEX ${filter_regex})
endif()
set("${out_var}" "${result}" PARENT_SCOPE)
endfunction()
function(prepare_json_sources out_var)
filter_nonexistent_files(sources ${ARGN})
filter_unsuitable_lupdate_input(sources ${sources})
filter_generated_ui_headers(sources ${sources})
list_to_json_array("${sources}" result)
set("${out_var}" "${result}" PARENT_SCOPE)
endfunction()
get_filename_component(project_root "${lupdate_project_file}" DIRECTORY)
# Make relative paths absolute to the project root
set(path_variables sources include_paths translations)
if(lupdate_subproject_count GREATER 0)
foreach(i RANGE 1 ${lupdate_subproject_count})
list(APPEND path_variables
subproject${i}_include_paths
subproject${i}_sources
subproject${i}_excluded
)
endforeach()
endif()
foreach(path_var IN LISTS path_variables)
set(absolute_${path_var} "")
foreach(path IN LISTS lupdate_${path_var})
if(NOT IS_ABSOLUTE "${path}")
if(path_var MATCHES "^subproject[0-9]+_")
set(base_dir "${lupdate_${CMAKE_MATCH_0}source_dir}")
else()
set(base_dir "${project_root}")
endif()
get_filename_component(path "${path}" ABSOLUTE BASE_DIR "${base_dir}")
endif()
list(APPEND absolute_${path_var} "${path}")
endforeach()
endforeach()
prepare_json_sources(json_sources ${absolute_sources})
list_to_json_array("${absolute_include_paths}" json_include_paths)
list_to_json_array("${absolute_translations}" json_translations)
set(content "{
\"projectFile\": \"${lupdate_project_file}\",
\"includePaths\": ${json_include_paths},
\"sources\": ${json_sources},
\"translations\": ${json_translations},
\"subProjects\": [
")
if(lupdate_subproject_count GREATER 0)
foreach(i RANGE 1 ${lupdate_subproject_count})
prepare_json_sources(json_sources ${absolute_subproject${i}_sources})
list_to_json_array("${absolute_subproject${i}_include_paths}" json_include_paths)
list_to_json_array("${absolute_subproject${i}_excluded}" json_sources_exclusions)
string(APPEND content " {
\"projectFile\": \"${lupdate_subproject${i}_source_dir}/CMakeLists.txt\",
\"includePaths\": ${json_include_paths},
\"sources\": ${json_sources},
\"excluded\": ${json_sources_exclusions}
}")
if(i LESS lupdate_subproject_count)
string(APPEND content ",")
endif()
string(APPEND content "\n")
endforeach()
endif()
string(APPEND content " ]
}
")
file(WRITE "${OUT_FILE}" "${content}")
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