Only build the decoration if the KDecoration2 is present

REVIEW: 127174

CMakeLists.txt

@@ -20,8 +20,13 @@ else()
   include(GenerateExportHeader)
   include(GtkUpdateIconCache)
 
+  option(WITH_DECORATIONS "Build Breeze window decorations for KWin" ON)
+  if(WITH_DECORATIONS)
+    find_package(KDecoration2 REQUIRED)
+    add_subdirectory(kdecoration)
+  endif()
+
   add_subdirectory(cursors)
-  add_subdirectory(kdecoration)
   add_subdirectory(kstyle)
   add_subdirectory(misc)
   add_subdirectory(qtquickcontrols)
@@ -30,8 +35,9 @@ else()
   INSTALL(FILES colors/Breeze.colors DESTINATION ${DATA_INSTALL_DIR}/color-schemes/)
   INSTALL(FILES colors/BreezeDark.colors DESTINATION ${DATA_INSTALL_DIR}/color-schemes/)
   INSTALL(FILES colors/BreezeHighContrast.colors DESTINATION ${DATA_INSTALL_DIR}/color-schemes/)
-  find_package(KF5Plasma CONFIG REQUIRED)
+
-  plasma_install_package(lookandfeel.dark org.kde.breezedark.desktop look-and-feel lookandfeel)
+  find_package(KF5Package CONFIG REQUIRED)
+  kpackage_install_package(lookandfeel.dark org.kde.breezedark.desktop look-and-feel lookandfeel)
   if(EXISTS ${CMAKE_SOURCE_DIR}/po AND IS_DIRECTORY ${CMAKE_SOURCE_DIR}/po)
     find_package(KF5I18n CONFIG REQUIRED)
     ki18n_install(po)

kdecoration/CMakeLists.txt

@@ -1,6 +1,5 @@
 add_definitions(-DTRANSLATION_DOMAIN="breeze_kwin_deco")
 
-find_package(KDecoration2 REQUIRED)
 find_package(KF5 REQUIRED COMPONENTS CoreAddons GuiAddons ConfigWidgets WindowSystem I18n)
 find_package(Qt5 CONFIG REQUIRED COMPONENTS DBus)