CMake build: Build Qbs if the submodule is available

Includes update of Qbs to current head of master, which enables this
feature on the Qbs build system side.

Fixes: QTCREATORBUG-23905
Change-Id: I9a537b640b7f7a753839ace3e44d174c8e0af526
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>
Reviewed-by: Ivan Komissarov <ABBAPOH@gmail.com>

.github/workflows/build_cmake.yml

@@ -48,9 +48,7 @@ jobs:
     - name: Checkout submodules
       run: |
         git submodule set-url -- perfparser https://code.qt.io/qt-creator/perfparser.git
-        git submodule update --init src/plugins/help/qlitehtml/litehtml
-        git submodule update --init src/tools/perfparser
-        git submodule update --init tests/unit/unittest/3rdparty/googletest
+        git submodule update --init
 
     - name: Download Ninja and CMake
       shell: cmake -P {0}

src/shared/CMakeLists.txt

@@ -4,3 +4,37 @@ add_subdirectory(qtsingleapplication)
 add_subdirectory(qtlockedfile)
 add_subdirectory(help)
 add_subdirectory(registryaccess)
+
+if (EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/qbs/CMakeLists.txt)
+  set(BUILD_QBS_DEFAULT YES)
+else()
+  set(BUILD_QBS_DEFAULT FALSE)
+endif()
+
+option(BUILD_QBS "Build Qbs together with Qt Creator" ${BUILD_QBS_DEFAULT})
+
+if (BUILD_QBS)
+  find_package(Qt5 COMPONENTS Script QUIET)
+  if (TARGET Qt5::Script)
+    set(ENABLE_BUILD_QBS YES)
+  endif()
+else()
+  set(ENABLE_BUILD_QBS NO)
+endif()
+
+add_feature_info("Build Qbs" ENABLE_BUILD_QBS "with CONDITION TARGET Qt5::Script")
+if (ENABLE_BUILD_QBS)
+  file(RELATIVE_PATH _REL_PATH_TO_QTC "${CMAKE_BINARY_DIR}" "${PROJECT_BINARY_DIR}")
+  set(QBS_OUTPUT_PREFIX "${_REL_PATH_TO_QTC}/" CACHE STRING "" FORCE)
+  set(QBS_APP_INSTALL_DIR "${IDE_BIN_PATH}" CACHE STRING "" FORCE)
+  set(QBS_LIB_INSTALL_DIR "${IDE_LIBRARY_PATH}" CACHE STRING "" FORCE)
+  set(QBS_DLL_INSTALL_DIR "${IDE_BIN_PATH}" CACHE STRING "" FORCE)
+  set(QBS_LIBEXEC_INSTALL_DIR "${IDE_LIBEXEC_PATH}" CACHE STRING "" FORCE)
+  set(QBS_PLUGINS_INSTALL_BASE "${IDE_PLUGIN_PATH}" CACHE STRING "" FORCE)
+  set(QBS_RESOURCES_INSTALL_BASE "${IDE_DATA_PATH}/qbs" CACHE STRING "" FORCE)
+  set(QBS_HEADERS_INSTALL_DIR "${IDE_DATA_PATH}/qbs/include/qbs" CACHE STRING "" FORCE)
+
+  set(INSTALL_PUBLIC_HEADERS OFF)
+  set(WITH_TESTS OFF)
+  add_subdirectory(qbs)
+endif()