Compile go proto types (cadence-workflow#94)

* Compile go proto types

* Fix build on M1 macs

* License header for generated files

LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2019 Uber Technologies, Inc.
+Copyright (c) 2021 Uber Technologies, Inc.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

Makefile

@@ -1,4 +1,13 @@
-.DEFAULT_GOAL := proto-lint
+.DEFAULT_GOAL := all
+
+# M1 macs may need to switch back to x86, until arm releases are available
+EMULATE_X86 =
+ifeq ($(shell uname -sm),Darwin arm64)
+EMULATE_X86 = arch -x86_64
+endif
+
+OS = $(shell uname -s)
+ARCH = $(shell $(EMULATE_X86) uname -m)
 
 BIN := .bin
 $(BIN):
@@ -7,8 +16,6 @@ $(BIN):
 # https://docs.buf.build/
 # changing BUF_VERSION will automatically download and use the specified version.
 BUF_VERSION = 0.36.0
-OS = $(shell uname -s)
-ARCH = $(shell uname -m)
 BUF_URL = https://github.com/bufbuild/buf/releases/download/v$(BUF_VERSION)/buf-$(OS)-$(ARCH)
 # use BUF_VERSION_BIN as a bin prerequisite, not "buf", so the correct version will be used.
 BUF_VERSION_BIN = buf-$(BUF_VERSION)
@@ -21,3 +28,52 @@ PROTO_ROOT := proto
 PROTO_FILES = $(shell find ./$(PROTO_ROOT) -name "*.proto")
 proto-lint: $(PROTO_FILES) $(BIN)/$(BUF_VERSION_BIN)
 	@$(BIN)/$(BUF_VERSION_BIN) lint
+
+# https://www.grpc.io/docs/languages/go/quickstart/
+# protoc-gen-gogofast (yarpc) are versioned via tools.go + go.mod (built above) and will be rebuilt as needed.
+# changing PROTOC_VERSION will automatically download and use the specified version
+PROTOC_VERSION = 3.14.0
+PROTOC_URL = https://github.com/protocolbuffers/protobuf/releases/download/v$(PROTOC_VERSION)/protoc-$(PROTOC_VERSION)-$(subst Darwin,osx,$(OS))-$(ARCH).zip
+# the zip contains an /include folder that we need to use to learn the well-known types
+PROTOC_UNZIP_DIR = $(BIN)/protoc-$(PROTOC_VERSION)-zip
+# use PROTOC_VERSION_BIN as a bin prerequisite, not "protoc", so the correct version will be used.
+# otherwise this must be a .PHONY rule, or the buf bin / symlink could become out of date.
+PROTOC_VERSION_BIN = protoc-$(PROTOC_VERSION)
+$(BIN)/$(PROTOC_VERSION_BIN): | $(BIN)
+	@echo "downloading protoc $(PROTOC_VERSION)"
+	@# recover from partial success
+	@rm -rf $(BIN)/protoc.zip $(PROTOC_UNZIP_DIR)
+	@# download, unzip, copy to a normal location
+	@curl -sSL $(PROTOC_URL) -o $(BIN)/protoc.zip
+	@unzip -q $(BIN)/protoc.zip -d $(PROTOC_UNZIP_DIR)
+	@cp $(PROTOC_UNZIP_DIR)/bin/protoc $@
+
+$(BIN)/protoc-gen-gogofast: go.mod | $(BIN)
+	go build -o $(BIN)/protoc-gen-gogofast github.com/gogo/protobuf/protoc-gen-gogofast
+
+$(BIN)/protoc-gen-yarpc-go: go.mod | $(BIN)
+	go build -o $(BIN)/protoc-gen-yarpc-go go.uber.org/yarpc/encoding/protobuf/protoc-gen-yarpc-go
+
+PROTO_GO_OUT := go/proto
+LICENSE_GO := LICENSE.go
+proto-go: $(PROTO_FILES) $(BIN)/$(PROTOC_VERSION_BIN) $(BIN)/protoc-gen-gogofast $(BIN)/protoc-gen-yarpc-go
+	@mkdir -p $(PROTO_GO_OUT)
+	@echo "protoc..."
+	@$(EMULATE_X86) $(BIN)/$(PROTOC_VERSION_BIN) \
+		--plugin $(BIN)/protoc-gen-gogofast \
+		--plugin $(BIN)/protoc-gen-yarpc-go \
+		-I=$(PROTO_ROOT) \
+		-I=$(PROTOC_UNZIP_DIR)/include \
+		--gogofast_out=Mgoogle/protobuf/duration.proto=github.com/gogo/protobuf/types,Mgoogle/protobuf/field_mask.proto=github.com/gogo/protobuf/types,Mgoogle/protobuf/timestamp.proto=github.com/gogo/protobuf/types,Mgoogle/protobuf/wrappers.proto=github.com/gogo/protobuf/types,paths=source_relative:$(PROTO_GO_OUT) \
+		--yarpc-go_out=$(PROTO_GO_OUT) \
+		$(PROTO_FILES);
+	@rm -r $(PROTO_GO_OUT)/api
+	@mv $(PROTO_GO_OUT)/uber/cadence/api $(PROTO_GO_OUT)
+	@rm -r $(PROTO_GO_OUT)/uber
+
+	@sed 's/^/\/\/ /' LICENSE > $(LICENSE_GO)
+	@echo >> $(LICENSE_GO)
+	find $(PROTO_GO_OUT) -type f -exec sh -c 'cat $(LICENSE_GO) $$1 > $$1.tmp; mv $$1.tmp $$1' sh {} \;
+	@rm $(LICENSE_GO)
+
+all: proto-lint proto-go

go.mod

@@ -0,0 +1,9 @@
+module github.com/uber/cadence-idl
+
+go 1.16
+
+require (
+	github.com/gogo/protobuf v1.3.2
+	go.uber.org/fx v1.10.0
+	go.uber.org/yarpc v1.55.0
+)