Terraform Makefile

Makefile

.ONESHELL:
SHELL = /bin/bash
.SHELLFLAGS = -e

CLEAN_TARGETS =

TF         = terraform
TF_DIR     = .terraform

STATE_FILE     = ${TF_DIR}/terraform.tfstate
STATE_PLAN     = ${TF_DIR}/terraform.tfplan
STATE_FILE_BAK = ${TF_DIR}/terraform.tfbackup

SOURCEDIR  := ./

SRCS := $(shell find $(SOURCEDIR) -name '*.tf')
SRCS += $(shell find $(SOURCEDIR) -name '*.tfvars')
SRCS += $(shell find $(SOURCEDIR) -name '*.json')

TF_MODULE_DIR = $(TF_DIR)/modules
CLEAN_TARGETS += $(TF_DIR)/modules/ $(STATE_PLAN) $(STATE_FILE_BAK)

define terraform
	$(strip $(TF) $(1) $(TF_FLAGS) $(2))
endef

$(STATE_PLAN): TF_FLAGS = -out=$(STATE_PLAN)
$(STATE_PLAN): $(SRCS)
	@$(MAKE) lint
	$(call terraform,plan)

$(STATE_FILE) : TF_FLAGS = -backend=true \
-get=true \
-force-copy \
-input=false
$(STATE_FILE) : $(SRCS) | $(TF_DIR)
	$(call terraform,init)

$(SRCS) : ;

$(TF_DIR) :
	mkdir -p $@

$(TF_MODULE_DIR):
	$(call terraform,get)

plan:
	rm -f $(STATE_PLAN)
	$(MAKE) $(STATE_PLAN)
	
apply: TF_FLAGS = -backup=$(STATE_FILE_BAK)
apply:
	$(call terraform,$@,$(STATE_PLAN))
	rm $(STATE_PLAN)

refresh:
	$(call terraform,$@)

lint: TF_FLAGS =
lint:
	$(call terraform,fmt)
	$(call terraform,validate)

clean: $(CLEAN_TARGETS)
	rm -rf $^