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What you could do is go the other way around. The program's canonical configuration format is pure data in a well-defined format (XML, JSON, Protocol Buffers, etc.). However, the top-level user-facing configuration is a script, written in a well-known (and ideally easily sandboxed) scripting language, whose output is the configuration data. The script can still load pure data files, which can be automatically analyzed and transformed, and with enough discipline most of the rapidly changing parts of your configuration will live in these pure data files. Even without this discipline, the final output of the configuration script is pure data that can easily be stored separately for tests, diffs, analyses, etc.



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