ifndef DEIS_NUM_INSTANCES
  DEIS_NUM_INSTANCES = 1
endif

define echo_cyan
  @echo "\033[0;36m$(subst ",,$(1))\033[0m"
endef

define echo_yellow
  @echo "\033[0;33m$(subst ",,$(1))\033[0m"
endef

SELF_DIR := $(dir $(lastword $(MAKEFILE_LIST)))

DOCKER_HOST = $(shell echo $$DOCKER_HOST)
REGISTRY = $(shell echo $$DEIS_REGISTRY)
GIT_SHA = $(shell git rev-parse --short HEAD)
GIT_TAG = git-$(GIT_SHA)

check-docker:
	@if [ -z "$$DOCKER_HOST" ]; then \
	  echo DOCKER_HOST is not exported, try \`boot2docker up\`; \
	  exit 2; \
	fi

check-registry:
	@if [ -z "$$DEIS_REGISTRY" ]; then \
	  echo DEIS_REGISTRY is not exported, try \`make dev-registry\`; \
	  exit 2; \
	fi

check-deisctl:
	@if [ -z $$(which deisctl) ]; then \
	  echo "Missing \`deisctl\` utility, please install from https://github.com/deis/deisctl"; \
	fi