Gogo proto makefile

Makefile

EMPTY  :=
SPACE := $(EMPTY) # 
COMMA := ,

GOPATH:=$(shell go env GOPATH)
GOBIN:=${GOPATH}/bin

PROTO_PATH := ${GOPATH}/src:.
PROTO_PATH := ${PROTO_PATH}:${GOPATH}/src/github.com/gogo/protobuf/protobuf
PROTO_PATH := ${PROTO_PATH}:${GOPATH}/src/github.com/gogo/protobuf/gogoproto

GOOGLE_PROTOS := timestamp duration empty
PROTO_SUBS := $(subst $(SPACE),$(COMMA),$(strip $(foreach gp,$(GOOGLE_PROTOS),Mgoogle/protobuf/$(gp).proto=github.com/gogo/protobuf/types)))

GOGOBINARY := gogo

GENGOGO := $(GOBIN)/protoc-gen-${GOGOBINARY}

DIRECTORIES := $(sort $(dir $(wildcard proto/*/)))
PROTO_SRC := $(foreach sdir,$(DIRECTORIES),$(wildcard $(sdir)*.proto))
PROTO_PB := $(patsubst %.proto,%.pb.go,$(PROTO_SRC))
PROTO_OTHER := $(patsubst %.proto,%.micro.go,$(PROTO_SRC)) $(patsubst %.proto,%pb_test.go,$(PROTO_SRC))

.PHONY: all clean

all: $(GENGOGO) $(PROTO_PB)

clean:
	rm $(PROTO_PB) $(PROTO_OTHER)

$(GENGOGO):
	go get github.com/gogo/protobuf/protoc-gen-${GOGOBINARY}

$(PROTO_PB): $(PROTO_SRC)
	protoc --proto_path=${PROTO_PATH} --${GOGOBINARY}_out=${PROTO_SUBS}:. --micro_out=${PROTO_SUBS}:. $<
	perl -i -p0e 's/(\t+type\s+)(\w+)(\s+interface.+?struct \{\s+)(\2)/\1I\2\3I\2/s' $(patsubst %.proto,%.micro.go,$(<))