GRPC Service Proxy and Encoding Interceptor (#738)

* Add GRPC Service Proxy
* Add GRPC Client Interceptor for encoding

Makefile

@@ -29,6 +29,11 @@ copyright $(BUILD)/copyright:
 	@mkdir -p $(BUILD)
 	@touch $(BUILD)/copyright
 
+# Ensure generated code dependent on the API is not stale
+generatorcheck:
+	(cd converter && go run ../internal/cmd/generateinterceptor/main.go -verifyOnly)
+	(cd client && go run ../internal/cmd/generateproxy/main.go -verifyOnly)
+
 $(BUILD)/dummy:
 	go build -o $@ internal/cmd/dummy/dummy.go
 
@@ -92,7 +97,7 @@ fmt:
 clean:
 	rm -rf $(BUILD)
 
-check: vet errcheck staticcheck copyright bins
+check: vet errcheck staticcheck copyright generatorcheck bins
 
 ##### Fossa #####
 fossa-install: 

client/client.go

@@ -23,6 +23,7 @@
 // THE SOFTWARE.
 
 //go:generate mockgen -copyright_file ../LICENSE -package client -source client.go -destination client_mock.go
+//go:generate go run ../internal/cmd/generateproxy/main.go
 
 // Package client is used by external programs to communicate with Temporal service.
 // NOTE: DO NOT USE THIS API INSIDE OF ANY WORKFLOW CODE!!!

converter/encoding_data_converter.go

@@ -20,6 +20,8 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 // THE SOFTWARE.
 
+//go:generate go run ../internal/cmd/generateinterceptor/main.go
+
 package converter
 
 import (