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Yes, The problem is that we want a pure data configuration format. We think that very few application require a full turing complete language for their configuration.

Bazel have too it's own (turing complete ?) Programming configuration language

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Bazel's language (https://github.com/bazelbuild/starlark), also used in Buck and other tools, is technically not Turing-complete. In Bazel's BUILD files, there are additional restrictions (e.g. no function definition), making them relatively declarative and tool-friendly.

I literally just started prototyping this exact idea last week: a python interpreter without any imports/stdlib as a configuration language.

I'm a little bummed I was beat to it. I was going back and forth on allowing defining functions. Definitely no classes.

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