"Protoc-gen-struct-transformer Plugin"
summary
Protoc-gen-struct-transformer claims to remove hand-written, field-by-field conversions by generating conversion functions between protobuf-generated Go structs and business-logic structs, invoked as a protoc plugin. It parses proto options that supply package names and the path to the business struct source and emits a Go file with converters that support pointers and slices and handle basic type casts (int→int64). The tool is open sourced and demonstrated working on a simple orders example.
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