Library providing routines to help supporting multiple versions of configuration files

This library provides some primitive operations to transform data between different format versions, as defined by one or more JSON schemas. The library works closely with conflate.

The library operates on data in the same form as that returned by json.Unmarshal i.e. hierarchical data containing any number of nested map[string]interface{} and/or []interface[] collections.

The overall aim of the library is to make it easier to support backwards-compatibility with older versions of configuration files, when you release a new version of your application.

For each new configuration version, you create a JSON schema, as for conflate, and you create a Conformer object to convert old configuration files to the new schema version. The Conformer is a functional-style chain of operations to move, rename, copy, delete or change the values of items in the configuration object. Multiple Conformer objects can be chained together so that multiple historical versions of your configuration files, can be supported by your application.

This library is in the early stages of development and will be further developed in a fork.