Mac: Build XIBs properly with CMake

ui/mac/CMakeLists.txt

@@ -18,12 +18,27 @@ set(COCOA_UI_SOURCES
     main.m)
 
 set(COCOA_UI_RESOURCES
-    AXAccountsWindow.xib
-    AXSignInWindow.xib
-    Auctions.xib
+    Auctions.icns
+)
+
+set(COCOA_UI_XIBS
+    AXAccountsWindow
+    AXSignInWindow
+    Auctions
     )
 
 add_executable(Auctions MACOSX_BUNDLE ${COCOA_UI_SOURCES} ${COCOA_UI_RESOURCES})
+
+set(COCOA_COMPILED_NIBS)
+
+find_program(IBTOOL ibtool REQUIRED)
+foreach(XIBFILE ${COCOA_UI_XIBS})
+    add_custom_command(TARGET Auctions POST_BUILD
+            COMMAND ${IBTOOL} --compile ${CMAKE_CURRENT_BINARY_DIR}/Auctions.app/Contents/Resources/${XIBFILE}.nib ${CMAKE_CURRENT_SOURCE_DIR}/${XIBFILE}.xib
+            COMMENT "Compiling NIB file ${XIBFILE}.nib")
+    list(APPEND COCOA_COMPILED_NIBS ${CMAKE_CURRENT_BINARY_DIR}/${XIBFILE}.nib)
+endforeach()
+
 set_target_properties(Auctions PROPERTIES
     MACOSX_BUNDLE TRUE
     MACOSX_BUNDLE_GUI_IDENTIFIER com.wilcox-tech.cocoa.Auctions