Add xcconfig back to PodTarget for UserProjectIntegrator

lib/cocoapods/generator/xcconfig.rb

@@ -19,6 +19,10 @@ module Pod
         @sandbox = library.sandbox
       end
 
+      # @return [Xcodeproj::Config] The generated xcconfig.
+      #
+      attr_reader :xcconfig
+
       # Generates and saves the xcconfig to the given path.
       #
       # @param  [Pathname] path
@@ -142,9 +146,9 @@ module Pod
           end
         end
 
-        xcconfig = Xcodeproj::Config.new(config)
-        xcconfig.includes = library.libraries.map(&:name)
-        xcconfig
+        @xcconfig = Xcodeproj::Config.new(config)
+        @xcconfig.includes = library.libraries.map(&:name)
+        @xcconfig
       end
 
     end
@@ -177,7 +181,8 @@ module Pod
       # @return [Xcodeproj::Config]
       #
       def generate
-        consumer_xcconfig(library.consumer)
+        @xcconfig = consumer_xcconfig(library.consumer)
+        @xcconfig
       end
 
     end
@@ -214,9 +219,9 @@ module Pod
           config[k] = "#{config[k]} ${#{prefixed_key}}"
         end
 
-        xcconfig = Xcodeproj::Config.new(config)
-        xcconfig.includes = [library.name]
-        xcconfig
+        @xcconfig = Xcodeproj::Config.new(config)
+        @xcconfig.includes = [library.name]
+        @xcconfig
       end
 
     end

lib/cocoapods/installer/target_installer.rb

@@ -174,6 +174,7 @@ module Pod
         UI.message "- Generating xcconfig file at #{UI.path(path)}" do
           gen = Generator::PodXCConfig.new(library)
           gen.save_as(path)
+          library.xcconfig = gen.xcconfig
           xcconfig_file_ref = add_file_to_support_group(path)
 
           target.build_configurations.each do |c|

lib/cocoapods/target.rb

@@ -150,6 +150,14 @@ module Pod
     #
     attr_accessor :user_target_uuids
 
+    # @return [Xcodeproj::Config] the configuration file of the library
+    #
+    # @note   The configuration is generated by the {TargetInstaller} and
+    #         used by {UserProjectIntegrator} to check for any overridden
+    #         values.
+    #
+    attr_accessor :xcconfig
+
     # @return [Array<SpecTarget>] the dependencies for this target (or library).
     #
     attr_accessor :libraries