metrics_service, als, trace_service: add api_go_grpc bazel rules (#3409)

Add api_go_grpc rules for metrics_service, als, and trace_service.

To support those changes, also added the necessary go_proto_library
rules in the repositories.bzl definitions for prometheus_metrics_model,
and io_opencensus_trace, and augmented the go_build_test.go to
verify these changes were correct.

Signed-off-by: William Chang <mr.williamchang@gmail.com>

Mirrored from https://github.com/envoyproxy/envoy @ fb7797fd7df696cd239cc1d3792719361b62c684

bazel/repositories.bzl

@@ -194,6 +194,7 @@ py_proto_library(
         url = "https://github.com/prometheus/client_model/archive/" + PROMETHEUS_SHA + ".tar.gz",
         build_file_content = """
 load("@envoy_api//bazel:api_build_system.bzl", "api_proto_library")
+load("@io_bazel_rules_go//proto:def.bzl", "go_proto_library")
 
 api_proto_library(
     name = "client_model",
@@ -202,6 +203,13 @@ api_proto_library(
     ],
     visibility = ["//visibility:public"],
 )
+
+go_proto_library(
+    name = "client_model_go_proto",
+    importpath = "client_model",
+    proto = ":client_model",
+    visibility = ["//visibility:public"],
+)
         """,
     )
 
@@ -211,6 +219,7 @@ api_proto_library(
         url = "https://github.com/census-instrumentation/opencensus-proto/archive/" + OPENCENSUS_SHA + ".tar.gz",
         build_file_content = """
 load("@envoy_api//bazel:api_build_system.bzl", "api_proto_library")
+load("@io_bazel_rules_go//proto:def.bzl", "go_proto_library")
 
 api_proto_library(
     name = "trace_model",
@@ -219,7 +228,12 @@ api_proto_library(
     ],
     visibility = ["//visibility:public"],
 )
+
+go_proto_library(
+    name = "trace_model_go_proto",
+    importpath = "trace_model",
+    proto = ":trace_model",
+    visibility = ["//visibility:public"],
+)
         """,
     )
-
-

envoy/service/accesslog/v2/BUILD

@@ -1,4 +1,4 @@
-load("//bazel:api_build_system.bzl", "api_proto_library")
+load("//bazel:api_build_system.bzl", "api_proto_library", "api_go_grpc_library")
 
 licenses(["notice"])  # Apache 2
 
@@ -12,3 +12,12 @@ api_proto_library(
         "//envoy/config/filter/accesslog/v2:accesslog",
     ],
 )
+
+api_go_grpc_library(
+    name = "als",
+    proto = ":als",
+    deps = [
+        "//envoy/api/v2/core:base_go_proto",
+        "//envoy/config/filter/accesslog/v2:accesslog_go_proto",
+    ],
+)

envoy/service/metrics/v2/BUILD

@@ -13,3 +13,12 @@ api_proto_library(
         "@promotheus_metrics_model//:client_model",
     ],
 )
+
+api_go_grpc_library(
+    name = "metrics_service",
+    proto = ":metrics_service",
+    deps = [
+        "//envoy/api/v2/core:base_go_proto",
+        "@promotheus_metrics_model//:client_model_go_proto",
+    ],
+)

envoy/service/trace/v2/BUILD

@@ -1,4 +1,4 @@
-load("//bazel:api_build_system.bzl", "api_proto_library")
+load("//bazel:api_build_system.bzl", "api_proto_library", "api_go_grpc_library")
 
 licenses(["notice"])  # Apache 2
 
@@ -12,3 +12,12 @@ api_proto_library(
         "@io_opencensus_trace//:trace_model",
     ],
 )
+
+api_go_grpc_library(
+    name = "trace_service",
+    proto = ":trace_service",
+    deps = [
+        "//envoy/api/v2/core:base_go_proto",
+        "@io_opencensus_trace//:trace_model_go_proto",
+    ],
+)

test/build/BUILD

@@ -30,9 +30,12 @@ api_go_test(
         "//envoy/api/v2:rds_go_grpc",
         "//envoy/api/v2/auth:cert_go_proto",
         "//envoy/config/bootstrap/v2:bootstrap_go_proto",
+        "//envoy/service/accesslog/v2:als_go_grpc",
         "//envoy/service/discovery/v2:ads_go_grpc",
         "//envoy/service/discovery/v2:hds_go_grpc",
         "//envoy/service/discovery/v2:sds_go_grpc",
+        "//envoy/service/metrics/v2:metrics_service_go_grpc",
         "//envoy/service/ratelimit/v2:rls_go_grpc",
+        "//envoy/service/trace/v2:trace_service_go_grpc",
     ],
 )

test/build/go_build_test.go

@@ -13,6 +13,9 @@ import (
 	_ "github.com/envoyproxy/data-plane-api/api/rds"
 	_ "github.com/envoyproxy/data-plane-api/api/rls"
 	_ "github.com/envoyproxy/data-plane-api/api/sds"
+	_ "github.com/envoyproxy/data-plane-api/api/als"
+	_ "github.com/envoyproxy/data-plane-api/api/metrics_service"
+	_ "github.com/envoyproxy/data-plane-api/api/trace_service"
 )
 
 func TestNoop(t *testing.T) {