[CMake] how to set per-configuration xcode attributes

[Jesse Beder]

I'm using the following syntax to set certain build settings on a
per-configuration basis:

set(CMAKE_CONFIGURATION_TYPES Debug Release Distribution)
set(CMAKE_CXX_FLAGS_DISTRIBUTION "-Os")

and also setting specific Xcode properties like this:

set_target_properties(${NAME} PROPERTIES
XCODE_ATTRIBUTE_CODE_SIGN_IDENTITY "some value")

I'd like to combine these somehow; that is, to set the Xcode attribute
CODE_SIGN_IDENTITY only for the "Distribution" configuration. Is this
possible?

Thanks,
Jesse