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require 'active_support/core_ext/module/aliasing'
require 'active_support/core_ext/array/extract_options'
module ActiveSupport
module Deprecation
# Declare that a method has been deprecated.
#
# module Fred
# extend self
#
# def foo; end
# def bar; end
# def baz; end
# end
#
# ActiveSupport::Deprecation.deprecate_methods(Fred, :foo, bar: :qux, baz: 'use Bar#baz instead')
# # => [:foo, :bar, :baz]
#
# Fred.foo
# # => "DEPRECATION WARNING: foo is deprecated and will be removed from Rails 4.1."
#
# Fred.bar
# # => "DEPRECATION WARNING: bar is deprecated and will be removed from Rails 4.1 (use qux instead)."
#
# Fred.baz
# # => "DEPRECATION WARNING: baz is deprecated and will be removed from Rails 4.1 (use Bar#baz instead)."
def self.deprecate_methods(target_module, *method_names)
options = method_names.extract_options!
method_names += options.keys
method_names.each do |method_name|
target_module.alias_method_chain(method_name, :deprecation) do |target, punctuation|
target_module.module_eval(<<-end_eval, __FILE__, __LINE__ + 1)
def #{target}_with_deprecation#{punctuation}(*args, &block)
::ActiveSupport::Deprecation.warn(
::ActiveSupport::Deprecation.deprecated_method_warning(
:#{method_name},
#{options[method_name].inspect}),
caller
)
send(:#{target}_without_deprecation#{punctuation}, *args, &block)
end
end_eval
end
end
end
end
end
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