Modify Go struct field type. It matches type by its string representation and replaces to another string.

Mostly useful for primitive types or types located in the same package. Maybe can be useful for external package types if followed by goimports.

My use case was replacing []byte type in a Protobuf generated code to custom Raw type.

Like this:

gomodifytype -file proxy.pb.go -all -w -from "[]byte" -to "Raw"

Thanks to https://github.com/fatih/gomodifytags for the AST modification example.