Duplicate and rename project in Qt6 with CMake

[Bert59]

I just started to work with Qt6 and CMake. I wonder if someone knows how to duplicate and rename a project correctly. I would like that the duplicated and renamed project shows up in Qt Creator as the sample below:

I tried a few things:

• Changing the hard coded names in CMake like below
  #project(Project_1 VERSION 0.1 LANGUAGES CXX)
  get_filename_component(ProjectId ${CMAKE_CURRENT_LIST_DIR} NAME)
  string(REPLACE " " "_" ProjectId ${ProjectId})
  project(${ProjectId} LANGUAGES CXX)

• Deleteting CMakeLists.txt.user file and the build directory before loading the duplicated project

But the project keeps either the old name or it doesn't load correctly.

[VRonin]

Can you post the contents of CMakeLists.txt?

[Bert59]

Hi

After creating Project_1 the CMakeLists.txt looked like that

cmake_minimum_required(VERSION 3.5)

project(Project_1 VERSION 0.1 LANGUAGES CXX)

set(CMAKE_INCLUDE_CURRENT_DIR ON)

set(CMAKE_AUTOUIC ON)
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)

set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

find_package(QT NAMES Qt6 Qt5 COMPONENTS Widgets REQUIRED)
find_package(Qt${QT_VERSION_MAJOR} COMPONENTS Widgets REQUIRED)

set(PROJECT_SOURCES
        main.cpp
        widget.cpp
        widget.h
        widget.ui
)

if(${QT_VERSION_MAJOR} GREATER_EQUAL 6)
    qt_add_executable(Project_1
        MANUAL_FINALIZATION
        ${PROJECT_SOURCES}
    )
else()
    if(ANDROID)
        add_library(Project_1 SHARED
            ${PROJECT_SOURCES}
        )
    else()
        add_executable(Project_1
            ${PROJECT_SOURCES}
        )
    endif()
endif()

target_link_libraries(Project_1 PRIVATE Qt${QT_VERSION_MAJOR}::Widgets)

set_target_properties(Project_1 PROPERTIES
    MACOSX_BUNDLE_GUI_IDENTIFIER my.example.com
    MACOSX_BUNDLE_BUNDLE_VERSION ${PROJECT_VERSION}
    MACOSX_BUNDLE_SHORT_VERSION_STRING ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}
)

if(QT_VERSION_MAJOR EQUAL 6)
    qt_finalize_executable(Project_1)
endif()

Then I changed it as follows

cmake_minimum_required(VERSION 3.5)

#project(Project_1 VERSION 0.1 LANGUAGES CXX)
get_filename_component(ProjectId ${CMAKE_CURRENT_LIST_DIR} NAME)
string(REPLACE " " "_" ProjectId ${ProjectId})
project(${ProjectId} LANGUAGES CXX)

set(CMAKE_INCLUDE_CURRENT_DIR ON)

set(CMAKE_AUTOUIC ON)
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)

set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

find_package(QT NAMES Qt6 Qt5 COMPONENTS Widgets REQUIRED)
find_package(Qt${QT_VERSION_MAJOR} COMPONENTS Widgets REQUIRED)

set(PROJECT_SOURCES
        main.cpp
        widget.cpp
        widget.h
        widget.ui
)

if(${QT_VERSION_MAJOR} GREATER_EQUAL 6)
    qt_add_executable(${CMAKE_PROJECT_NAME}
        MANUAL_FINALIZATION
        ${PROJECT_SOURCES}
    )
else()
    if(ANDROID)
        add_library(${CMAKE_PROJECT_NAME} SHARED
            ${PROJECT_SOURCES}
        )
    else()
        add_executable(${CMAKE_PROJECT_NAME}
            ${PROJECT_SOURCES}
        )
    endif()
endif()

target_link_libraries(${CMAKE_PROJECT_NAME} PRIVATE Qt${QT_VERSION_MAJOR}::Widgets)

set_target_properties(${CMAKE_PROJECT_NAME} PROPERTIES
    MACOSX_BUNDLE_GUI_IDENTIFIER my.example.com
    MACOSX_BUNDLE_BUNDLE_VERSION ${PROJECT_VERSION}
    MACOSX_BUNDLE_SHORT_VERSION_STRING ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}
)

if(QT_VERSION_MAJOR EQUAL 6)
    qt_finalize_executable(${CMAKE_PROJECT_NAME})
endif()

But I got the following error

As I'm new to CMake I was not sure what to do.
So after your response I tried to remove the following code

#set_target_properties(${CMAKE_PROJECT_NAME} PROPERTIES
#    MACOSX_BUNDLE_GUI_IDENTIFIER my.example.com
#    MACOSX_BUNDLE_BUNDLE_VERSION ${PROJECT_VERSION}
#    MACOSX_BUNDLE_SHORT_VERSION_STRING ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}
#)

Now it works but I don't know what will be the side effect of removing this block of code.

After making the changes described above I copied the folder Project_1 and renamed it to Project_2.
I also deleted the file CMakeLists.txt.user.
Now wenn I load Project_2 in Qt Creator it displays Project_2 as expected.

[jgugenheim]

@Bert59 This has come up for me a few times, for instance as one of several prototypes is selected as the real project. I have never successfully managed it and always end up copying and rewriting (with all the attendand dangers) the selected prototype files and ui into a new project.

Can I vote for a "File->Save project as..." menu item please???

[VRonin]

@Bert59 said in Duplicate and rename project in Qt6 with CMake:

#project(Project_1 VERSION 0.1 LANGUAGES CXX)

If you comment out this line how is CMake supposed to know what the project name is? that's what the error is telling you