protocol buffers - How to include .proto files having mutual dependency -


i have 2 .proto files, has 2 packages have mutual dependency.

a.proto

syntax = "proto3"; import "b.proto";  package a;  message cert {     string filename = 1;     uint32 length = 2; }  enum state {     = 1;     down = 2; }  message events {     repeated b.event curevent = 1;     uint32 val = 2; }

b.proto

syntax = "proto3"; import "a.proto";  package b;  message event {      a.cert certificate = 1;      a.state curstate = 2; }

when try generate cpp files, following error seen

# protoc -i. --cpp_out=. b.proto b.proto: file recursively imports itself: b.proto -> a.proto -> b.proto

how can achieved ?

note : protoc version used libprotoc 3.3.0

proto compiler won't let include circular dependencies. have organize code such there aren't recursive imports. 1 organization of sample code above be:

a.proto

syntax = "proto3";  package a;  message cert {     string filename = 1;     uint32 length = 2; }  enum state {     undefined = 0;     = 1;     down = 2; }

b.proto

syntax = "proto3"; import "a.proto";  package b;  message event {     a.cert certificate = 1;     a.state curstate = 2; }  message events {     repeated event curevent = 1;     uint32 val = 2; }

your events type doesn't use a.proto, , uses event type b.proto. makes sense move b.proto.


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