Best practice for methods used only during pre-initialization?

production.rb

# This simple solution permanently adds a method on Object that
# will never be used outside this file.

def compile_asset?(path)
  # ... lots of complicated logic ...
  # returns boolean
end

Foo::Application.configure do
  ...
  config.assets.precompile = [ method(:compile_asset?).to_proc ]
end

# One way to keep things clean

class <<Foo::Application 
  def compile_asset?(path)
    # ... lots of complicated logic ...
    # returns boolean
  end
end

Foo::Application.configure do
  ...
  config.assets.precompile = [ method(:compile_asset?).to_proc ]
end

class <<Foo::Application
  remove_method :compile_asset?
end

# What's a more elegant way?

I'm probably wrap them all in a module that sticks around but then doesn't leak out into Object.