Using Kubernetes context and Docker endpoint of Minikube in a Makefile

Makefile

ifeq ($(ENV), local)
	# if local, then user docker registry of minikube
	export DOCKER_TLS_VERIFY := $(shell minikube docker-env | grep DOCKER_TLS_VERIFY | cut -d\= -f2 | tr -d \")
	export DOCKER_HOST := $(shell minikube docker-env | grep DOCKER_HOST | cut -d\= -f2 | tr -d \")
	export DOCKER_CERT_PATH := $(shell minikube docker-env | grep DOCKER_CERT_PATH | cut -d\= -f2 | tr -d \")
	export DOCKER_API_VERSION := $(shell minikube docker-env | grep DOCKER_API_VERSION | cut -d\= -f2 | tr -d \")
	# if local, then user kubernetes context of minikube
	export MY_CONTEXT := $(shell kubectl config use-context minikube; echo "using minikube context")
else
	# use kubernetes context specified in configuration file
	# variable MY_CONTEXT is not used, but the command is executed
	export MY_CONTEXT := $(shell kubectl config use-context $(MY_KUBERNETES_CONTEXT); echo "using specific context")
endif