Golang Makefile for SAM project

Makefile

GOLANG := go
GOLANG_TEST_FLAGS ?= -v
GOLANG_TEST_RUN ?= .
GOLANG_TEST_PATH ?= ./...
GO_LAMBDA_ENV ?= GOOS=linux GOARCH=arm64
GO_LAMBDA_BUILD_FLAGS ?= -ldflags="-s -w" -tags "lambda.norpc"
GO_LAMBDA_BUILD ?= ${GO_LAMBDA_ENV} ${GOLANG} build ${GO_LAMBDA_BUILD_FLAGS}

GO_FILES := $(shell find . -type f -name '*.go' ! -name '*_test.go')
GO_TEST_FILES := $(shell find . -type f -name '*_test.go')

.PHONY: test
test:
	${GOLANG} test ${GOLANG_TEST_FLAGS} -run ${GOLANG_TEST_RUN} ${GOLANG_TEST_PATH}

.PHONY: clean
clean:
	rm -rf ./bin
	${GOLANG} clean -testcache
  
bin/%/bootstrap: ${GO_FILES} ./go.mod ./go.sum
	${GO_LAMBDA_BUILD} -o $@ ./cmd/$(patsubst bin/%/bootstrap,%,$@)