common.go.mk

# Copyright © 2021 Luther Systems, Ltd. All right reserved.

# common.go.mk
#
# A base makefile for building golang applications and packaging them in docker
# containers.

PROJECT_REL_DIR ?= .
include ${PROJECT_REL_DIR}/common.mk

BUILD_IMAGE=${BUILD_IMAGE_GO_ALPINE}:${BUILDENV_TAG}
SERVICE_BASE_IMAGE=${SERVICE_BASE_IMAGE_ALPINE}:${BUILDENV_TAG}

BUILD_IMAGE_SERVICE_DIR=${SERVICE_ROOT_DIR}
BUILD_IMAGE_PROJECT_DIR=/go/src/${PROJECT_PATH}
BUILD_WORKDIR=${BUILD_IMAGE_PROJECT_DIR}/${BUILD_IMAGE_SERVICE_DIR}

DOCKER_IMAGE=${PROJECT}/${SERVICE}

DOCKER_IMAGE_DUMMY=$(call IMAGE_DUMMY,${DOCKER_IMAGE}/${VERSION})

GO_SOURCE_FILES=$(shell find ${PROJECT_REL_DIR} -name '*.go' | grep -v '/vendor/')

GO_PKG_DUMMY=${PROJECT_REL_DIR}/$(call DUMMY_TARGET,pkg,${GO_PKG_VOLUME})
GO_PKG_VOLUME_DUMMY=${PROJECT_REL_DIR}/$(call DUMMY_TARGET,volume,${GO_PKG_VOLUME})

GO_BUILD_TAGS ?= osusergo,netgo,cgo,timetzdata
GO_BUILD_FLAGS="-installsuffix ${GO_BUILD_TAGS} -tags ${GO_BUILD_TAGS} -buildvcs=false"

.PHONY: default
default: docker-build
	@

.PHONY: docker-build
docker-build: ${DOCKER_IMAGE_DUMMY}
	@

.PHONY: clean
clean:
	${RM} -rf build ${GO_PKG_VOLUME_DUMMY}
	# docker volume rm will fail if the volume doesn't exist
	-${DOCKER} volume rm ${GO_PKG_VOLUME}
	# make sure it's really gone
	sh -c '! ${DOCKER} volume inspect ${GO_PKG_VOLUME}'

${DOCKER_IMAGE_DUMMY}: ${GO_SOURCE_FILES} Makefile ${PROJECT_REL_DIR}/common.mk ${PROJECT_REL_DIR}/go.mod ${PROJECT_REL_DIR}/common.go.mk ${PROJECT_REL_DIR}/Dockerfile
	${MKDIR_P} $(dir $@)
	@echo "Building image ${DOCKER_IMAGE}"
	${TIME_P} ${DOCKER} build \
		--build-arg "BUILD_IMAGE=${BUILD_IMAGE}" \
		--build-arg "SERVICE_BASE_IMAGE=${SERVICE_BASE_IMAGE}" \
		--build-arg "GONOSUMDB=${GONOSUMDB}" \
		--build-arg "GOPROXY=${GOPROXY}" \
		--build-arg "GO_BUILD_TAGS=${GO_BUILD_TAGS}" \
		--build-arg "VERSION=${VERSION}" \
		--build-arg "SERVICE_DIR=${SERVICE_DIR}" \
		-t ${DOCKER_IMAGE}:latest \
		-t ${DOCKER_IMAGE}:${VERSION} \
		-f ${PROJECT_REL_DIR}/Dockerfile ${PROJECT_REL_DIR}
	${TOUCH} $@

${GO_PKG_DUMMY}:
	${DOCKER} volume inspect ${GO_PKG_VOLUME} || ${DOCKER} volume create ${GO_PKG_VOLUME}
	mkdir -p $(dir $@)
	touch $@

.PHONY: host-go-env
host-go-env:
	@echo export "${HOST_GO_ENV}"