使用 CMake 创建 Qt 翻译文件答案

【问题标题】：Create Qt translation files with CMake使用 CMake 创建 Qt 翻译文件
【发布时间】：2017-02-15 01:00:01
【问题描述】：

当我尝试在 CMake 进程中添加生成翻译的进程时遇到问题。

现在我有以下 CMakeLists.txt：

configure_file(${CMAKE_CURRENT_SOURCE_DIR}/defines.h.cmake
               ${CMAKE_CURRENT_BINARY_DIR}/defines.h)

file(GLOB_RECURSE UI_FILES *.ui)
file(GLOB_RECURSE CODE_FILES *.cpp)

qt5_wrap_ui(UI_HEADERS ${UI_FILES})

# Qt5LinguistTools
find_package(Qt5LinguistTools)
FILE(GLOB TS_FILES "${CMAKE_CURRENT_SOURCE_DIR}/../resources/langs/*.ts")
QT5_create_translation(QM_FILES ${CODE_FILES} ${TS_FILES})

# Resources
qt5_add_resources(RESOURCE_FILES ../resources/resources.qrc)

# Windows application icon
if (WIN32)
  set(WINDOWS_RES_FILE ${CMAKE_CURRENT_BINARY_DIR}/resources.obj)
  if (MSVC)
    add_custom_command(OUTPUT ${WINDOWS_RES_FILE}
      COMMAND rc.exe /fo ${WINDOWS_RES_FILE} resources.rc
      WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/cmake/win
    )
  else()
    add_custom_command(OUTPUT ${WINDOWS_RES_FILE}
      COMMAND windres.exe resources.rc ${WINDOWS_RES_FILE}
      WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/cmake/win
    )
  endif()
endif()

#Move Qm files to resources langs folder
install(FILES ${QM_FILES} DESTINATION ${CMAKE_INSTALL_PREFIX}/../resources/langs)

add_executable(${CMAKE_PROJECT_NAME} WIN32
  ${QM_FILES}
  ${UI_HEADERS}
  ${CODE_FILES}
  ${RESOURCE_FILES}
  ${WINDOWS_RES_FILE}
)
target_link_libraries(${CMAKE_PROJECT_NAME}
  Qt5::Widgets
  QtAwesome
)

if (UNIX)
  install(TARGETS ${CMAKE_PROJECT_NAME}
          RUNTIME DESTINATION bin)
elseif (WIN32)
  install(TARGETS ${CMAKE_PROJECT_NAME}
          DESTINATION .)
endif()

似乎这段代码正确地生成了 .qm 文件，但不是在被资源文件读取之前。所以我收到一个错误：NMAKE : fatal error U1073: don't know how to make '..\..\..\resources\langs\lang_en_US.qm'

也许我没有以正确的方式这样做，或者我需要从不在资源文件中的其他地方读取语言文件。

您能否就如何生成 QM 文件并在构建过程中添加它们提供建议。

【问题讨论】：

标签： c++ qt cmake qt5

【解决方案1】：

来自documentation：

可以通过将 qm_files 添加到库/可执行文件的源列表中来更新翻译，因此它们始终会更新，或者通过添加自定义目标来控制它们何时更新/生成。

您可以创建自定义目标并添加依赖项：

add_custom_target(translations ALL DEPENDS ${QM_FILES})

add_custom_target(resources ALL DEPENDS ${RESOURCE_FILES})

add_dependencies(resources translations)

add_executable(${CMAKE_PROJECT_NAME} WIN32
  ${UI_HEADERS}
  ${CODE_FILES}
  ${RESOURCE_FILES}
  ${WINDOWS_RES_FILE}
)
add_dependencies(${CMAKE_PROJECT_NAME} resources)

【讨论】：

【解决方案2】：

这就是我正在为 QOwnNotes 做的事情：https://github.com/pbek/QOwnNotes/blob/develop/src/CMakeLists.txt

# Translation files
SET(QON_TS_FILES
languages/QOwnNotes_en.ts
        languages/QOwnNotes_de.ts
        languages/QOwnNotes_fr.ts
        languages/QOwnNotes_pl.ts
        languages/QOwnNotes_zh.ts
        languages/QOwnNotes_ru.ts
        languages/QOwnNotes_pt.ts
        languages/QOwnNotes_es.ts
        languages/QOwnNotes_nl.ts
        languages/QOwnNotes_hu.ts
        languages/QOwnNotes_ja.ts
        languages/QOwnNotes_it.ts
        languages/QOwnNotes_ar.ts
)

qt5_add_translation(QON_QM_FILES ${QON_TS_FILES})
add_custom_target(translations DEPENDS ${QON_QM_FILES})

if(NOT QT_TRANSLATIONS_DIR)
# If this directory is missing, we are in a Qt5 environment.
# Extract the qmake executable location
get_target_property(QT5_QMAKE_EXECUTABLE Qt5::qmake IMPORTED_LOCATION)
# Ask Qt5 where to put the translations
execute_process( COMMAND ${QT5_QMAKE_EXECUTABLE} -query QT_INSTALL_TRANSLATIONS
OUTPUT_VARIABLE qt_translations_dir OUTPUT_STRIP_TRAILING_WHITESPACE )
# make sure we have / and not \ as qmake gives on windows
file( TO_CMAKE_PATH "${qt_translations_dir}" qt_translations_dir)
set( QT_TRANSLATIONS_DIR ${qt_translations_dir} CACHE PATH
"The location of the Qt translations" FORCE)
endif()

install(FILES ${QON_QM_FILES}
DESTINATION ${QT_TRANSLATIONS_DIR})

add_executable(QOwnNotes ${SOURCE_FILES} ${RESOURCE_ADDED} ${QON_QM_FILES})

这对你有帮助吗？

【讨论】：