retina
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microsoft
feat: Add the ability to overlay configuration
In certain deployments, it's desirable to have one set of configuration pre-set and another set of overrides to that configuration. In this overlay configuration, only certain fields should be overridable--additional provided fields should be ignored.
This modifies GetConfig in a backwards-compatible way to accept a variadic list of configuration overlays. These overlays take a filesystem path and a set of allowed fields that are permitted from those overlay configs. It also introduces internal types for performing filtering of these configuration files.
These are currently not used. A subsequent pull request will integrate this work.
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