terraform makefile

# Set default shell to bash
SHELL := /bin/bash -o pipefail

BUILD_TOOLS_VERSION ?= v0.5.3
BUILD_TOOLS_DOCKER_REPO = mineiros/build-tools
BUILD_TOOLS_DOCKER_IMAGE ?= ${BUILD_TOOLS_DOCKER_REPO}:${BUILD_TOOLS_VERSION}

TERRAFORM_PLANFILE ?= out.tfplan

ifndef NOCOLOR
	GREEN  := $(shell tput -Txterm setaf 2)
	YELLOW := $(shell tput -Txterm setaf 3)
	WHITE  := $(shell tput -Txterm setaf 7)
	RESET  := $(shell tput -Txterm sgr0)
endif

DOCKER_RUN_FLAGS += --rm
DOCKER_RUN_FLAGS += -v ${PWD}:/app/src
DOCKER_RUN_FLAGS += -e TF_IN_AUTOMATION
DOCKER_RUN_FLAGS += -e USER_UID=$(shell id -u)

DOCKER_AWS_FLAGS += -e AWS_ACCESS_KEY_ID
DOCKER_AWS_FLAGS += -e AWS_SECRET_ACCESS_KEY
DOCKER_AWS_FLAGS += -e AWS_SESSION_TOKEN

DOCKER_SSH_FLAGS += -e SSH_AUTH_SOCK=/ssh-agent
DOCKER_SSH_FLAGS += -v ${SSH_AUTH_SOCK}:/ssh-agent

DOCKER_GITHUB_FLAGS += -e GITHUB_TOKEN
DOCKER_GITHUB_FLAGS += -e GITHUB_ORGANIZATION

DOCKER_FLAGS   += ${DOCKER_RUN_FLAGS}
DOCKER_RUN_CMD  = docker run ${DOCKER_FLAGS} ${BUILD_TOOLS_DOCKER_IMAGE}

.PHONY: default
default: help

## Run the pre-commit hooks inside build-tools docker
.PHONY: test/pre-commit
test/pre-commit: DOCKER_FLAGS += ${DOCKER_SSH_FLAGS}
test/pre-commit: DOCKER_FLAGS += ${DOCKER_GITHUB_FLAGS}
test/pre-commit:
	$(call docker-run,pre-commit run -a)

## Run terraform init inside build-tools docker
.PHONY: terraform/init
terraform/init: DOCKER_FLAGS += ${DOCKER_AWS_FLAGS}
terraform/init: DOCKER_FLAGS += ${DOCKER_GITHUB_FLAGS}
terraform/init: DOCKER_FLAGS += ${DOCKER_SSH_FLAGS}
terraform/init:
	$(call docker-run,terraform init -input=false)

## Run terraform plan inside build-tools docker
.PHONY: terraform/plan
terraform/plan: DOCKER_FLAGS += ${DOCKER_AWS_FLAGS}
terraform/plan: DOCKER_FLAGS += ${DOCKER_GITHUB_FLAGS}
terraform/plan:
	$(call docker-run,terraform plan -input=false -out=${TERRAFORM_PLANFILE})

## Run terraform apply inside build-tools docker
.PHONY: terraform/apply
terraform/apply: DOCKER_FLAGS += ${DOCKER_AWS_FLAGS}
terraform/apply: DOCKER_FLAGS += ${DOCKER_GITHUB_FLAGS}
terraform/apply:
	$(call docker-run,terraform apply -input=false -auto-approve ${TERRAFORM_PLANFILE})

## remove .terraform and *.tfplan
.PHONY: clean
clean:
	$(call rm-command,.terraform)
	$(call rm-command,*.tfplan)

## Display help for all targets
.PHONY: help
help:
	@awk '/^.PHONY: / { \
		msg = match(lastLine, /^## /); \
			if (msg) { \
				cmd = substr($$0, 9, 100); \
				msg = substr(lastLine, 4, 1000); \
				printf "  ${GREEN}%-30s${RESET} %s\n", cmd, msg; \
			} \
	} \
	{ lastLine = $$0 }' $(MAKEFILE_LIST)

quiet-command = $(if ${V},${1},$(if ${2},@echo ${2} && ${1}, @${1}))

docker-run = $(call quiet-command,${DOCKER_RUN_CMD} ${1} | cat,"${YELLOW}[DOCKER RUN] ${GREEN}${1}${RESET}")
rm-command = $(call quiet-command,rm -rf ${1},"${YELLOW}[CLEAN] ${GREEN}${1}${RESET}")