protoc-gen-goexample

An example of a protoc plugin in go

Build

go build .

Run the plugin

protoc --plugin protoc-gen-goexample --goexample_out=output example.proto

Passing additional data to generators

Parameters may be set for additional information

protoc --plugin protoc-gen-goexample --goexample_out=param1=value1,param2=value2:output example.proto

I believe an equivalent, cleaner, way to do this would be using the opt argument

protoc --plugin ./protoc-gen-goexample --goexample_out=output --goexample_opt=param1=value1,param2=value2 example.proto

Parameters shall apply to multiple files. See an example in generateCode for parsing comments. You might consider using annotations as comments to apply additional data at the message level, or field level, by adding annotations as leading comments.