Generate proto for C++

open-telemetry#1787

Signed-off-by: Charlie Le <charlie_le@apple.com>

Author: CharlieTLe

docker-gen-proto.sh

@@ -14,6 +14,13 @@ gen_proto_go() {
     protoc -I /build/pb /build/pb/demo.proto --go_out="./src/$1/" --go-grpc_out="./src/$1/"
 }
 
+gen_proto_cpp() {
+  echo "Generating Cpp protobuf files for $1"
+  docker build --build-arg OPENTELEMETRY_CPP_VERSION=${OPENTELEMETRY_CPP_VERSION} -f "src/$1/genproto/Dockerfile" -t "$1-genproto" .
+  docker run --rm -v $(pwd):/build "$1-genproto" \
+    cp -r "/$1/build/generated" "/build/src/$1/"
+}
+
 gen_proto_python() {
   echo "Generating Python protobuf files for $1"
   docker build -f "src/$1/genproto/Dockerfile" -t "$1-genproto" .
@@ -25,7 +32,7 @@ gen_proto_python() {
 #gen_proto_java ad
 #gen_proto_dotnet cart
 gen_proto_go checkoutservice
-#gen_proto_cpp currency
+gen_proto_cpp currency
 #gen_proto_ruby email
 #gen_proto_ts frontend
 #gen_proto_js payment