cmake build: Use qtc_add_resources for StudioWelcome

Avoids creating resource file if plugin is disabled.

Change-Id: Ia3e1a127c49cae4b03547367a78ca7dd8c3689f3
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

cmake/QtCreatorAPI.cmake

@@ -774,19 +774,6 @@ function(finalize_qtc_gtest test_name exclude_sources_regex)
   endforeach()
 endfunction()
 
-# This is the CMake equivalent of "RESOURCES = $$files()" from qmake
-function(qtc_glob_resources)
-  cmake_parse_arguments(_arg "" "QRC_FILE;ROOT;GLOB" "" ${ARGN})
-
-  file(GLOB_RECURSE fileList RELATIVE "${_arg_ROOT}" "${_arg_ROOT}/${_arg_GLOB}")
-  set(qrcData "<RCC><qresource>\n")
-  foreach(file IN LISTS fileList)
-    string(APPEND qrcData "  <file alias=\"${file}\">${_arg_ROOT}/${file}</file>\n")
-  endforeach()
-  string(APPEND qrcData "</qresource></RCC>")
-  file(WRITE "${_arg_QRC_FILE}" "${qrcData}")
-endfunction()
-
 function(qtc_copy_to_builddir custom_target_name)
   cmake_parse_arguments(_arg "CREATE_SUBDIRS" "DESTINATION" "FILES;DIRECTORIES" ${ARGN})
   set(timestampFiles)

src/plugins/studiowelcome/CMakeLists.txt

@@ -1,11 +1,3 @@
-set(qmlQrcFile "${CMAKE_CURRENT_BINARY_DIR}/StudioWelcome_qml.qrc")
-
-qtc_glob_resources(
-  QRC_FILE "${qmlQrcFile}"
-  ROOT "${CMAKE_CURRENT_SOURCE_DIR}"
-  GLOB "qml/*"
-)
-
 add_qtc_plugin(StudioWelcome
   DEPENDS Qt5::QuickWidgets
   PLUGIN_DEPENDS Core ProjectExplorer QtSupport
@@ -14,8 +6,15 @@ add_qtc_plugin(StudioWelcome
     studiowelcomeplugin.cpp studiowelcomeplugin.h
     studiowelcome_global.h
     studiowelcome.qrc
-    ${qmlQrcFile}
     "${PROJECT_SOURCE_DIR}/src/share/3rdparty/studiofonts/studiofonts.qrc"
   EXTRA_TRANSLATIONS
     qml
 )
+
+if (TARGET StudioWelcome)
+  file(GLOB_RECURSE qmlfiles
+    RELATIVE "${CMAKE_CURRENT_SOURCE_DIR}"
+    qml/*
+  )
+  qtc_add_resources(StudioWelcome StudioWelcome_qml FILES ${qmlfiles})
+endif()