# VERSION/RELEASE
# If no version is specified as a parameter of make, the last git hash
# value is taken.
VERSION?=$(shell git describe --abbrev=0)+$(shell date +'%Y%m%d%H%I%S')
RELEASE?=1

# GOPROXY settings
# If no GOPROXY environment variable available, the pre-defined GOPROXY from go
# env to download and validate go modules is used. Exclude downloading and
# validation of all private modules which are pre-defined in GOPRIVATE. If no
# GOPRIVATE variable defined, the variable of go env is used.
GOPROXY?=$(shell go env GOPROXY)
GOPRIVATE?=$(shell go env GOPRIVATE)

# EXECUTABLE
# Executable binary which should be compiled for different architecures
EXECUTABLE:=flucky

# DARWIN_EXECUTABLES AND TARGETS
DARWIN_EXECUTABLES:=\
	darwin/386/${EXECUTABLE} \
	darwin/amd64/${EXECUTABLE}

DARWIN_EXECUTABLE_TARGETS:=\
	${DARWIN_EXECUTABLES:%=bin/%}

# FREEBSD_EXECUTABLES AND TARGETS
FREEBSD_EXECUTABLES:=\
	freebsd/amd64/${EXECUTABLE}

FREEBSD_EXECUTABLE_TARGETS:=\
	${FREEBSD_EXECUTABLES:%=bin/%}

# LINUX_EXECUTABLES AND TARGETS
LINUX_EXECUTABLES:=\
	linux/amd64/${EXECUTABLE} \
	linux/386/${EXECUTABLE} \
	linux/arm/5/${EXECUTABLE} \
	linux/arm/7/${EXECUTABLE}

LINUX_EXECUTABLE_TARGETS:=\
	${LINUX_EXECUTABLES:%=bin/%}

# UNIX_EXECUTABLES AND TARGETS
# Define all executables for different architectures and operation systems
UNIX_EXECUTABLES:= \
	${DARWIN_EXECUTABLES} \
	${FREEBSD_EXECUTABLES} \
	${LINUX_EXECUTABLES}

UNIX_EXECUTABLE_TARGETS:= \
	${DARWIN_EXECUTABLE_TARGETS} \
	${FREEBSD_EXECUTABLE_TARGETS} \
	${LINUX_EXECUTABLE_TARGETS}

# EXECUTABLES AND TARGETS
# Include all UNIX and Windows targets.
EXECUTABLES:=\
	${UNIX_EXECUTABLES}

EXECUTABLE_TARGETS:= \
	${UNIX_EXECUTABLE_TARGETS}

# CONTAINER_RUNTIME / BUILD_IMAGE
# The CONTAINER_RUNTIME variable will be used to specified the path to a
# container runtime. This is needed to start and run a container image defined
# by the BUILD_IMAGE variable.
CONTAINER_RUNTIME?=$(shell which docker)

# BUILD_IMAGE
# The BUILD_IMAGE container serve as build environment to execute the different
# make steps inside. Therefore, the bulid environment requires all necessary
# dependancies to build this project.
BUILD_IMAGE:=docker.io/volkerraschek/build-image:latest

# BASE_IMAGE
# Defines the name of the container base image on which should be built the new
# CONTAINER_IMAGE.
BASE_IMAGE=docker.io/library/alpine:3.11.2

# REGISTRY / CONTAINER_IMAGE
# Specification of the container registry. This is needed to build and push the
# container image on a container registry. Additionally, the CONTAINER_IMAGE
# variable is composed based on the REGISTRY_NAMESPACE, the CONTAINER_IMAGE_NAME
# and the CONTAINER_IMAGE_VERSION
REGISTRY_MIRROR:=docker.io
REGISTRY_NAMESPACE:=volkerraschek
CONTAINER_IMAGE_NAME:=${EXECUTABLE}
CONTAINER_IMAGE_VERSION:=latest
CONTAINER_IMAGE=${REGISTRY_NAMESPACE}/${CONTAINER_IMAGE_NAME}/${CONTAINER_IMAGE_VERSION:v%=%}

# BINARIES
# ==============================================================================
# current os
${EXECUTABLE}: bin/tmp/${EXECUTABLE}

# build all binaries
PHONY:=all
all: ${EXECUTABLE_TARGETS}

# darwin os
bin/darwin/386/${EXECUTABLE}: bindata
	CGO_ENABLED=0 \
	GOOS=darwin \
	GOARCH=386 \
	GOPROXY=${GOPROXY} \
	GOPRIVATE=${GOPRIVATE} \
		go build -ldflags "-X main.version=${VERSION:v%=%}" -o ${@}

bin/darwin/amd64/${EXECUTABLE}: bindata
	CGO_ENABLED=0 \
	GOOS=darwin \
	GOARCH=amd64 \
	GOPROXY=${GOPROXY} \
	GOPRIVATE=${GOPRIVATE} \
		go build -ldflags "-X main.version=${VERSION:v%=%}" -o ${@}

# freebsd os
bin/freebsd/amd64/${EXECUTABLE}: bindata
	CGO_ENABLED=0 \
	GOOS=freebsd \
	GOARCH=amd64 \
	GOPROXY=${GOPROXY} \
	GOPRIVATE=${GOPRIVATE} \
		go build -ldflags "-X main.version=${VERSION:v%=%}" -o ${@}

# linux os
bin/linux/386/${EXECUTABLE}: bindata
	CGO_ENABLED=0 \
	GOOS=linux \
	GOARCH=386 \
	GOPROXY=${GOPROXY} \
	GOPRIVATE=${GOPRIVATE} \
		go build -ldflags "-X main.version=${VERSION:v%=%}" -o ${@}

bin/linux/amd64/${EXECUTABLE}: bindata
	CGO_ENABLED=0 \
	GOOS=linux \
	GOARCH=amd64 \
	GOPROXY=${GOPROXY} \
	GOPRIVATE=${GOPRIVATE} \
		go build -ldflags "-X main.version=${VERSION:v%=%}" -o ${@}

bin/linux/arm/5/${EXECUTABLE}: bindata
	CGO_ENABLED=0 \
	GOOS=linux \
	GOARCH=arm \
	GOARM=5 \
	GOPROXY=${GOPROXY} \
	GOPRIVATE=${GOPRIVATE} \
		go build -ldflags "-X main.version=${VERSION:v%=%}" -o ${@}

bin/linux/arm/7/${EXECUTABLE}: bindata
	CGO_ENABLED=0 \
	GOOS=linux \
	GOARCH=arm \
	GOARM=7 \
	GOPROXY=${GOPROXY} \
	GOPRIVATE=${GOPRIVATE} \
		go build -ldflags "-X main.version=${VERSION:v%=%}" -o ${@}

bin/tmp/${EXECUTABLE}: bindata
	CGO_ENABLED=0 \
	GOPROXY=${GOPROXY} \
	GOPRIVATE=${GOPRIVATE} \
		go build -ldflags "-X main.version=${VERSION:v%=%}" -o ${@}

# GO-BINDATA
# ==============================================================================
BINDATA_TARGETS := \
	pkg/storage/db/bindataSQL.go \
	test/goldenfiles/bindata.go

PHONY+=bindata
bindata: ${BINDATA_TARGETS}

pkg/storage/db/bindataSQL.go:
	go-bindata -pkg db -o ./pkg/storage/db/bindataSQL.go ./pkg/storage/db/sql/*** ./pkg/storage/db/sql/psql/schema/***

test/goldenfiles/bindata.go:
	go-bindata -pkg goldenfiles -ignore ".*\.go" -o ./test/goldenfiles/bindata.go ./test/goldenfiles/***

# TEST
# ==============================================================================
PHONY+=test test-update-all
test: ${EXECUTABLE}
	go test -v ./...

test-update-all: ${EXECUTABLE}
	go test -v ./pkg/... -update all

# PACKAGES
# ==============================================================================
%.rpm: %
	rpm-builder \
		--exec-file "$<:/usr/bin/${EXECUTABLE}" \
		--dir "systemd:/usr/lib/systemd/system" \
		--license "Apache 2.0" \
		--version ${VERSION:v%=%} \
		--release ${RELEASE} \
		--out ${@} \
		${EXECUTABLE}

# OTHER STUFF
# ==============================================================================
PHONY+=clean
clean:
	rm --force ${BINDATA_TARGETS} || true
	rm --force --recursive bin/ || true

# CONTAINER IMAGE STEPS
# ==============================================================================
PHONY+=container-image/build/amd64
container-image/build/amd64:
	${CONTAINER_RUNTIME} build \
		--build-arg BASE_IMAGE=${BASE_IMAGE} \
		--build-arg BUILD_IMAGE=${BUILD_IMAGE} \
		--build-arg EXECUTABLE=${EXECUTABLE} \
		--build-arg EXECUTABLE_TARGET=bin/linux/amd64/${EXECUTABLE} \
		--build-arg GOPROXY=${GOPROXY} \
		--build-arg GOPRIVATE=${GOPRIVATE} \
		--build-arg VERSION=${VERSION} \
		--file Dockerfile \
		--no-cache \
		--tag ${REGISTRY_MIRROR}/${CONTAINER_IMAGE} \
		--tag ${CONTAINER_IMAGE} \
		.

PHONY+=container-image/push/amd64
container-image/push/amd64: container-image/build/amd64
	${CONTAINER_RUNTIME} push ${REGISTRY_MIRROR}/${CONTAINER_IMAGE}

# CONTAINER STEPS - BINARY
# ==============================================================================
# current os
PHONY+=container-run/${EXECUTABLE}
container-run/${EXECUTABLE}:
	$(MAKE) container-run COMMAND=${@:container-run/%=%}

# build all binaries for any operating system
PHONY+=container-run/all
container-run/all:
	$(MAKE) container-run COMMAND=${@:container-run/%=%}

PHONY+=${UNIX_EXECUTABLE_TARGETS:%=container-run/%}
${UNIX_EXECUTABLE_TARGETS:%=container-run/%}:
	$(MAKE) container-run COMMAND=${@:container-run/%=%}

# CONTAINER STEPS - GO-BINDATA
# ==============================================================================
PHONY+=container-run/bindata
container-run/bindata:
	$(MAKE) container-run COMMAND=${@:container-run/%=%}

# CONTAINER STEPS - TEST
# ==============================================================================
PHONY+=container-run/test
container-run/test:
	$(MAKE) container-run COMMAND=${@:container-run/%=%}

PHONY+=container-run/test-update-all
container-run/test-update-all:
	$(MAKE) container-run COMMAND=${@:container-run/%=%}

# CONTAINER STEPS - OTHER STUF
# ==============================================================================
PHONY+=container-run/clean
container-run/clean:
	$(MAKE) container-run COMMAND=${@:container-run/%=%}

# GENERAL CONTAINER COMMAND
# ==============================================================================
PHONY+=container-run
container-run:
	${CONTAINER_RUNTIME} run \
		--rm \
		--volume ${PWD}:/workspace \
		${BUILD_IMAGE} \
			make ${COMMAND} \
				VERSION=${VERSION:v%=%} \
				RELEASE=${RELEASE}

# REMOTE
# ==============================================================================
PHONY+=${FLUCKY_REMOTE:%=remote/%}
remote/${FLUCKY_REMOTE}: bin/linux/arm/7/${EXECUTABLE}
	scp bin/linux/arm/7/${EXECUTABLE} root@${FLUCKY_REMOTE}:/usr/local/bin/${EXECUTABLE}
	ssh root@${FLUCKY_REMOTE} 'chmod +x /usr/local/bin/${EXECUTABLE}'

# PHONY
# ==============================================================================
# Declare the contents of the PHONY variable as phony.  We keep that information
# in a variable so we can use it in if_changed.
.PHONY: ${PHONY}