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| module Shitlist | |
| def shitlist(method_name, whitelist) | |
| original_method = instance_method(method_name) | |
| undef_method(method_name) | |
| define_method(method_name) do |*args, &block| | |
| call = caller_locations.first | |
| passes_whitelist = whitelist.any? do |label, file_pattern| | |
| call.label == label && call.absolute_path.end_with?(file_pattern) | |
| end | |
| unless passes_whitelist | |
| fail "Shitlisted method! Permitted callers: #{whitelist}" | |
| end | |
| original_method.bind(self).call(*args, &block) | |
| end | |
| end | |
| end | |
| class Example | |
| extend Shitlist | |
| def not_on_shitlist | |
| qux | |
| end | |
| def baz | |
| qux | |
| end | |
| def qux | |
| puts 'Only some methods can call me :)' | |
| end | |
| shitlist :qux, 'baz' => 'shitlist.rb' | |
| end | |
| example = Example.new | |
| # This will work | |
| example.baz | |
| # This will fail | |
| example.not_on_shitlist |
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