Add "checkgenerate" make target to CI

.gitignore

@@ -1,3 +1,4 @@
 dist/
 .idea/
 VERSION
+.tmp/

Makefile

@@ -1,12 +1,14 @@
 dev_build_version=$(shell git describe --tags --always --dirty)
 
+export PATH := $(shell pwd)/.tmp/protoc/bin:$(PATH)
+
 # TODO: run golint and errcheck, but only to catch *new* violations and
 # decide whether to change code or not (e.g. we need to be able to whitelist
 # violations already in the code). They can be useful to catch errors, but
 # they are just too noisy to be a requirement for a CI -- we don't even *want*
 # to fix some of the things they consider to be violations.
 .PHONY: ci
-ci: deps checkgofmt vet staticcheck ineffassign predeclared test
+ci: deps checkgofmt checkgenerate vet staticcheck ineffassign predeclared test
 
 .PHONY: deps
 deps:
@@ -31,6 +33,19 @@ docker:
 	docker build -t fullstorydev/grpcurl:$(dev_build_version) .
 	@rm VERSION
 
+.PHONY: generate
+generate: .tmp/protoc/bin/protoc
+	@go install google.golang.org/protobuf/cmd/protoc-gen-go@a709e31e5d12
+	@go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@v1.1.0
+	go generate ./...
+
+.PHONY: checkgenerate
+checkgenerate: generate
+	git status --porcelain
+	@if [ -n "$$(git status --porcelain)" ]; then \
+		exit 1; \
+	fi
+
 .PHONY: checkgofmt
 checkgofmt:
 	gofmt -s -l .
@@ -44,7 +59,7 @@ vet:
 
 .PHONY: staticcheck
 staticcheck:
-	@go install honnef.co/go/tools/cmd/staticcheck@v0.3.3
+	@go install honnef.co/go/tools/cmd/staticcheck@v0.4.3
 	staticcheck ./...
 
 .PHONY: ineffassign
@@ -72,3 +87,7 @@ errcheck:
 .PHONY: test
 test:
 	go test -race ./...
+
+.tmp/protoc/bin/protoc:
+	./download_protoc.sh
+

download_protoc.sh

@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+
+set -e
+
+cd $(dirname $0)
+
+PROTOC_VERSION="22.0"
+PROTOC_OS="$(uname -s)"
+PROTOC_ARCH="$(uname -m)"
+case "${PROTOC_OS}" in
+  Darwin) PROTOC_OS="osx" ;;
+  Linux) PROTOC_OS="linux" ;;
+  *)
+    echo "Invalid value for uname -s: ${PROTOC_OS}" >&2
+    exit 1
+esac
+
+# This is for macs with M1 chips. Precompiled binaries for osx/amd64 are not available for download, so for that case
+# we download the x86_64 version instead. This will work as long as rosetta2 is installed.
+if [ "$PROTOC_OS" = "osx" ] && [ "$PROTOC_ARCH" = "arm64" ]; then
+  PROTOC_ARCH="x86_64"
+fi
+
+PROTOC="${PWD}/.tmp/protoc/bin/protoc"
+
+if [[ "$(${PROTOC} --version 2>/dev/null)" != "libprotoc 3.${PROTOC_VERSION}" ]]; then
+  rm -rf ./.tmp/protoc
+  mkdir -p .tmp/protoc
+  curl -L "https://github.com/google/protobuf/releases/download/v${PROTOC_VERSION}/protoc-${PROTOC_VERSION}-${PROTOC_OS}-${PROTOC_ARCH}.zip" > .tmp/protoc/protoc.zip
+  cd ./.tmp/protoc && unzip protoc.zip && cd ..
+fi
+

internal/testing/cmd/bankdemo/bank.go

@@ -12,6 +12,7 @@ import (
 
 // bankServer implements the Bank gRPC service.
 type bankServer struct {
+	UnimplementedBankServer
 	allAccounts *accounts
 }