Add semantic versioning to proto IDL

  * (A) proto/types/types.proto
    - Addition of types module for version extension
  * (M) proto/tunnel/tunnel.proto
  * (M) cmd/target/proto/config/target_config.proto
    - Adjust versioning to semver utilizing the new extension
  * (M) compile_protos.sh
    - Adjust protoc compilation, tidy up go mod and regenerate golang
      stubs

Author: earies

cmd/target/proto/config/target_config.pb.go

@@ -14,12 +14,14 @@
 // limitations under the License.
 //
 
-// Version: 0.1
-
 syntax = "proto3";
 
+import "github.com/openconfig/grpctunnel/proto/types/types.proto";
+
 package targetconfig;
 
+option (grpctunnel.types.version) = "0.1.0";
+
 option go_package = "github.com/openconfig/grpctunnel/cmd/target/proto/targetconfig";
 
 message TLS {

cmd/target/proto/config/target_config.proto

@@ -16,8 +16,19 @@
 
 set -euo pipefail
 
-proto_imports=".:${GOPATH}/src/google.golang.org/protobuf:${GOPATH}/src"
+proto_imports=".:${GOPATH}/src"
 
 # Go
-protoc -I=$proto_imports --go_out=paths=source_relative:. proto/tunnel/tunnel.proto --go-grpc_out=.
-protoc -I=$proto_imports --go_out=paths=source_relative:. cmd/target/proto/config/target_config.proto --go-grpc_out=.
+protoc -I="${proto_imports}" \
+    --go-grpc_out=. --go-grpc_opt=paths=source_relative \
+    --go_out=. --go_opt=paths=source_relative proto/types/types.proto
+
+protoc -I="${proto_imports}" \
+    --go-grpc_out=. --go-grpc_opt=paths=source_relative \
+    --go_opt=Mproto/types/types.proto=github.com/openconfig/grpctunnel/proto/types \
+    --go_out=. --go_opt=paths=source_relative proto/tunnel/tunnel.proto
+
+protoc -I="${proto_imports}" \
+    --go-grpc_out=. --go-grpc_opt=paths=source_relative \
+    --go_opt=Mproto/types/types.proto=github.com/openconfig/grpctunnel/proto/types \
+    --go_out=. --go_opt=paths=source_relative cmd/target/proto/config/target_config.proto

compile_protos.sh

@@ -4,12 +4,10 @@ go 1.14
 
 require (
 	github.com/cenkalti/backoff/v4 v4.1.1
-	github.com/golang/protobuf v1.5.2
 	golang.org/x/net v0.0.0-20210805182204-aaa1db679c0d // indirect
 	golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e // indirect
 	golang.org/x/text v0.3.7 // indirect
 	google.golang.org/genproto v0.0.0-20210811021853-ddbe55d93216 // indirect
 	google.golang.org/grpc v1.40.0
-	google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.1.0 // indirect
 	google.golang.org/protobuf v1.27.1
 )