PROJECT := ortools
BUILD_SYSTEM := make
BRANCH := $(shell git rev-parse --abbrev-ref HEAD)
SHA1 := $(shell git rev-parse --verify HEAD)

# General commands
.PHONY: help
BOLD=\e[1m
RESET=\e[0m

help:
	@echo -e "${BOLD}SYNOPSIS${RESET}"
	@echo -e "\tmake <target> [NOCACHE=1]"
	@echo
	@echo -e "${BOLD}DESCRIPTION${RESET}"
	@echo -e "\ttest build inside docker container to have a reproductible build."
	@echo
	@echo -e "${BOLD}MAKE TARGETS${RESET}"
	@echo -e "\t${BOLD}help${RESET}: display this help and exit."
	@echo
	@echo -e "\t${BOLD}<prestage>${RESET}: build <prestage> docker images for ALL DISTROS."
	@echo -e "\t${BOLD}<distro>_<prestage>${RESET}: build the <prestage> docker image for a specific distro."
	@echo -e "\t${BOLD}save_<prestage>${RESET}: Save <prestage> docker images for ALL DISTROS."
	@echo -e "\t${BOLD}save_<distro>_<prestage>${RESET}: Save the <prestage> docker image for a specific distro."
	@echo -e "\t${BOLD}sh_<distro>_<prestage>${RESET}: run a container using the <prestage> docker image specified (debug purpose)."
	@echo
	@echo -e "\t${BOLD}<stage>${RESET}: build <stage> docker images for ALL DISTROS and ALL LANGUAGES."
	@echo -e "\t${BOLD}<distro>_<stage>${RESET}: build <stage> docker images for a specific distro for ALL LANGUAGES."
	@echo -e "\t${BOLD}<lang>_<stage>${RESET}: build <stage> docker images for ALL DISTROS for a specific language."
	@echo -e "\t${BOLD}<distro>_<lang>_<stage>${RESET}: build the <stage> docker image for a specific distro for a specific language."
	@echo -e "\t${BOLD}save_<stage>${RESET}: Save <stage> docker images for ALL DISTROS for ALL LANGUAGES."
	@echo -e "\t${BOLD}save_<distro>_<stage>${RESET}: Save <stage> docker images for a specific distro for ALL LANGUAGES."
	@echo -e "\t${BOLD}save_<lang>_<stage>${RESET}: Save <stage> docker images for ALL DISTRO for a specific language."
	@echo -e "\t${BOLD}save_<distro>_<lang>_<stage>${RESET}: Save the <stage> docker image for a specific distro for a specific language."
	@echo -e "\t${BOLD}sh_<distro>_<lang>_<stage>${RESET}: run a container using the <stage> docker image specified (debug purpose)."
	@echo
	@echo -e "\t${BOLD}<distro>${RESET}:"
	@echo -e "\t\t${BOLD}alpine${RESET} (edge)"
	@echo -e "\t\t${BOLD}archlinux${RESET} (latest)"
	@echo -e "\t\t${BOLD}centos${RESET} (latest)"
	@echo -e "\t\t${BOLD}debian${RESET} (latest)"
	@echo -e "\t\t${BOLD}fedora${RESET} (latest)"
	@echo -e "\t\t${BOLD}opensuse${RESET} (tumbleweed)"
	@echo -e "\t\t${BOLD}ubuntu${RESET} (rolling)"
	@echo
	@echo -e "\t${BOLD}<prestage>${RESET}:"
	@echo -e "\t\t${BOLD}base${RESET} (need by cpp)"
	@echo -e "\t\t${BOLD}swig${RESET} (need by .Net, Java and Python)"
	@echo -e "\te.g. 'make alpine_base'"
	@echo
	@echo -e "\t${BOLD}<lang>${RESET}:"
	@echo -e "\t\t${BOLD}cpp${RESET} (C++)"
	@echo -e "\t\t${BOLD}python${RESET} (Python >= 3)"
	@echo -e "\t\t${BOLD}java${RESET} (Java >= 8)"
	@echo -e "\t\t${BOLD}dotnet${RESET} (.Net Core >= 2.1)"
	@echo -e "\te.g. 'make alpine_cpp_devel'"
	@echo
	@echo -e "\t${BOLD}<stage>${RESET}:"
	@echo -e "\t\t${BOLD}env${RESET}"
	@echo -e "\t\t${BOLD}devel${RESET}"
	@echo -e "\t\t${BOLD}build${RESET}"
	@echo -e "\t\t${BOLD}test${RESET}"
	@echo -e "\t\t${BOLD}package${RESET}"
	@echo -e "\te.g. 'make make_alpine_cpp_build'"
	@echo
	@echo
	@echo -e "\t${BOLD}clean${RESET}: Remove cache and docker image."
	@echo -e "\t${BOLD}clean_<distro>${RESET}: Remove cache and docker image for the specified distro."
	@echo
	@echo -e "\t${BOLD}NOCACHE=1${RESET}: use 'docker build --no-cache' when building container (default use cache)."
	@echo
	@echo -e "branch: $(BRANCH)"
	@echo -e "sha1: $(SHA1)"

# Need to add cmd_distro to PHONY otherwise target are ignored since they do not
# contain recipe (using FORCE do not work here)
.PHONY: all
all: devel

# Delete all implicit rules to speed up makefile
MAKEFLAGS += --no-builtin-rules
.SUFFIXES:
# Remove some rules from gmake that .SUFFIXES does not remove.
SUFFIXES =
# Keep all intermediate files
# ToDo: try to remove it later
.SECONDARY:

# Docker image name prefix.
IMAGE := ${PROJECT}/${BUILD_SYSTEM}

ifdef NOCACHE
DOCKER_BUILD_CMD := docker build --no-cache
else
DOCKER_BUILD_CMD := docker build
endif

DOCKER_RUN_CMD := docker run --rm --init --net=host

# Currently supported distro
DISTROS = alpine archlinux centos debian fedora opensuse ubuntu
LANGUAGES = cpp python java dotnet

# $* stem
# $< first prerequist
# $@ target name

###############
## PRESTAGES ##
###############
PRESTAGES = base swig
define make-prestage-target
#$$(info STAGE: $1)
#$$(info Create targets: $1 $(addsuffix _$1, $(DISTROS)).)
targets_$1 = $(addsuffix _$1, $(DISTROS))
.PHONY: $1 $$(targets_$1)
$1: $$(targets_$1)
$$(targets_$1): %_$1: docker/%/Dockerfile
	#@docker image rm -f ${IMAGE}:$$*_$1 2>/dev/null
	${DOCKER_BUILD_CMD} --target=$1 --tag ${IMAGE}:$$*_$1 -f $$< ..

#$$(info Create targets: save_$1 $(addprefix save_, $(addsuffix _$1, $(DISTROS))) (debug).)
save_targets_$1 = $(addprefix save_, $(addsuffix _$1, $(DISTROS)))
.PHONY: save_$1 $$(save_targets_$1)
save_$1: $$(save_targets_$1)
$$(save_targets_$1): save_%_$1: cache/%/docker_$1.tar
cache/%/docker_$1.tar: %_$1
	@rm -f $$@
	mkdir -p cache/$$*
	docker save ${IMAGE}:$$*_$1 -o $$@

#$$(info Create targets: $(addprefix sh_, $(addsuffix _$1, $(DISTROS))) (debug).)
sh_targets_$1 = $(addprefix sh_, $(addsuffix _$1, $(DISTROS)))
.PHONY: $$(sh_targets_$1)
$$(sh_targets_$1): sh_%_$1: %_$1
	${DOCKER_RUN_CMD} -it --name ${PROJECT}_${BUILD_SYSTEM}_$$*_$1 ${IMAGE}:$$*_$1

#$$(info Create targets: $(addprefix clean_, $(addsuffix _$1, $(DISTROS))).)
clean_targets_$1 = $(addprefix clean_, $(addsuffix _$1, $(DISTROS)))
.PHONY: clean_$1 $$(clean_targets_$1)
clean_$1: $$(clean_targets_$1)
$$(clean_targets_$1): clean_%_$1:
	docker image rm -f ${IMAGE}:$$*_$1 2>/dev/null
	rm -f cache/$$*/docker_$1.tar
endef

$(foreach stage,$(PRESTAGES),$(eval $(call make-prestage-target,$(stage))))

############
## STAGES ##
############
STAGES = env devel build test package
define make-stage-target
#$$(info STAGE: $1)
#$$(info Create targets: $1 $(addsuffix _$1, $(DISTROS)).)
targets_$1 = $(addsuffix _$1, $(DISTROS))
.PHONY: $1 $$(targets_$1)
$1: $$(targets_$1)
$$(targets_$1): %_$1: $(addprefix %_, $(addsuffix _$1, $(LANGUAGES)))

#$$(info Create targets: $(addsuffix _$1, $(LANGUAGES)).)
targets_$1 = $(addsuffix _$1, $(LANGUAGES))
.PHONY: $$(targets_$1)
$$(targets_$1): %_$1: $(addsuffix _$1, $(addsuffix _%, $(DISTROS)))

#$$(info Create targets: $(addsuffix _cpp_$1, $(DISTROS)))
cpp_targets_$1 = $(addsuffix _cpp_$1, $(DISTROS))
#$$(info Create targets: $(addsuffix _dotnet_$1, $(DISTROS)))
dotnet_targets_$1 = $(addsuffix _dotnet_$1, $(DISTROS))
#$$(info Create targets: $(addsuffix _java_$1, $(DISTROS)))
java_targets_$1 = $(addsuffix _java_$1, $(DISTROS))
#$$(info Create targets: $(addsuffix _python_$1, $(DISTROS)))
python_targets_$1 = $(addsuffix _python_$1, $(DISTROS))
.PHONY: $$(cpp_targets_$1) $$(dotnet_targets_$1) $$(java_targets_$1) $$(python_targets_$1)

$$(cpp_targets_$1): %_cpp_$1: docker/%/cpp.Dockerfile %_base
	#@docker image rm -f ${IMAGE}:$$*_cpp_$1 2>/dev/null
	${DOCKER_BUILD_CMD} --target=$1 --tag ${IMAGE}:$$*_cpp_$1 -f $$< ..
$$(dotnet_targets_$1): %_dotnet_$1: docker/%/dotnet.Dockerfile %_swig
	#@docker image rm -f ${IMAGE}:$$*_dotnet_$1 2>/dev/null
	${DOCKER_BUILD_CMD} --target=$1 --tag ${IMAGE}:$$*_dotnet_$1 -f $$< ..
$$(java_targets_$1): %_java_$1: docker/%/java.Dockerfile %_swig
	#@docker image rm -f ${IMAGE}:$$*_java_$1 2>/dev/null
	${DOCKER_BUILD_CMD} --target=$1 --tag ${IMAGE}:$$*_java_$1 -f $$< ..
$$(python_targets_$1): %_python_$1: docker/%/python.Dockerfile %_swig
	#@docker image rm -f ${IMAGE}:$$*_python_$1 2>/dev/null
	${DOCKER_BUILD_CMD} --target=$1 --tag ${IMAGE}:$$*_python_$1 -f $$< ..

# Save $1 docker images (debug).
#$$(info Create targets: save_$1 $(addprefix save_, $(addsuffix _$1, $(DISTROS))).)
targets_$1 = $(addprefix save_, $(addsuffix _$1, $(DISTROS)))
.PHONY: save_$1 $$(targets_$1)
save_$1: $$(targets_$1)
$$(targets_$1): save_%_$1: $(addprefix save_%_, $(addsuffix _$1, $(LANGUAGES)))

#$$(info Create targets: $(addprefix save_, $(addsuffix _$1, $(LANGUAGES))).)
targets_$1 = $(addprefix save_, $(addsuffix _$1, $(LANGUAGES)))
.PHONY: $$(targets_$1)
$$(targets_$1): save_%_$1: $(addprefix save_, $(addsuffix _%_$1, $(DISTROS)))

#$$(info Create targets: $(addprefix save_, $(addsuffix _cpp_$1, $(DISTROS))))
cpp_targets_$1 = $(addprefix save_, $(addsuffix _cpp_$1, $(DISTROS)))
#$$(info Create targets: $(addprefix save_, $(addsuffix _dotnet_$1, $(DISTROS))))
dotnet_targets_$1 = $(addprefix save_, $(addsuffix _dotnet_$1, $(DISTROS)))
#$$(info Create targets: $(addprefix save_, $(addsuffix _java_$1, $(DISTROS))))
java_targets_$1 = $(addprefix save_, $(addsuffix _java_$1, $(DISTROS)))
#$$(info Create targets: $(addprefix save_, $(addsuffix _python_$1, $(DISTROS))))
python_targets_$1 = $(addprefix save_, $(addsuffix _python_$1, $(DISTROS)))
.PHONY: $$(cpp_targets_$1) $$(dotnet_targets_$1) $$(java_targets_$1) $$(python_targets_$1)

$$(cpp_targets_$1): save_%_cpp_$1: cache/%/docker_cpp_$1.tar
cache/%/docker_cpp_$1.tar: %_cpp_$1
	@rm -f $$@
	mkdir -p cache/$$*
	docker save ${IMAGE}:$$*_cpp_$1 -o $$@
$$(dotnet_targets_$1): save_%_dotnet_$1: cache/%/docker_dotnet_$1.tar
cache/%/docker_dotnet_$1.tar: %_dotnet_$1
	@rm -f $$@
	mkdir -p cache/$$*
	docker save ${IMAGE}:$$*_dotnet_$1 -o $$@
$$(java_targets_$1): save_%_java_$1: cache/%/docker_java_$1.tar
cache/%/docker_java_$1.tar: %_java_$1
	@rm -f $$@
	mkdir -p cache/$$*
	docker save ${IMAGE}:$$*_java_$1 -o $$@
$$(python_targets_$1): save_%_python_$1: cache/%/docker_python_$1.tar
cache/%/docker_python_$1.tar: %_python_$1
	@rm -f $$@
	mkdir -p cache/$$*
	docker save ${IMAGE}:$$*_python_$1 -o $$@

# Run a container using the <distro>_<lang>_$1 image (debug).
#$$(info Create targets: $(addprefix sh_, $(addsuffix _cpp_$1, $(DISTROS))))
cpp_targets_$1 = $(addprefix sh_, $(addsuffix _cpp_$1, $(DISTROS)))
#$$(info Create targets: $(addprefix sh_, $(addsuffix _dotnet_$1, $(DISTROS))))
dotnet_targets_$1 = $(addprefix sh_, $(addsuffix _dotnet_$1, $(DISTROS)))
#$$(info Create targets: $(addprefix sh_, $(addsuffix _java_$1, $(DISTROS))))
java_targets_$1 = $(addprefix sh_, $(addsuffix _java_$1, $(DISTROS)))
#$$(info Create targets: $(addprefix sh_, $(addsuffix _python_$1, $(DISTROS))))
python_targets_$1 = $(addprefix sh_, $(addsuffix _python_$1, $(DISTROS)))
.PHONY: $$(cpp_targets_$1) $$(dotnet_targets_$1) $$(java_targets_$1) $$(python_targets_$1)

$$(cpp_targets_$1): sh_%_cpp_$1: %_cpp_$1
	${DOCKER_RUN_CMD} -it --name ${PROJECT}_${BUILD_SYSTEM}_$$*_cpp_$1 ${IMAGE}:$$*_cpp_$1
$$(dotnet_targets_$1): sh_%_dotnet_$1: %_dotnet_$1
	${DOCKER_RUN_CMD} -it --name ${PROJECT}_${BUILD_SYSTEM}_$$*_dotnet_$1 ${IMAGE}:$$*_dotnet_$1
$$(java_targets_$1): sh_%_java_$1: %_java_$1
	${DOCKER_RUN_CMD} -it --name ${PROJECT}_${BUILD_SYSTEM}_$$*_java_$1 ${IMAGE}:$$*_java_$1
$$(python_targets_$1): sh_%_python_$1: %_python_$1
	${DOCKER_RUN_CMD} -it --name ${PROJECT}_${BUILD_SYSTEM}_$$*_python_$1 ${IMAGE}:$$*_python_$1

# Clean $1 docker images.
#$$(info Create targets: clean_$1 $(addprefix clean_, $(addsuffix _$1, $(DISTROS))).)
targets_$1 = $(addprefix clean_, $(addsuffix _$1, $(DISTROS)))
.PHONY: clean_$1 $(targets_$1)
clean_$1: $$(targets_$1)
$$(targets_$1): clean_%_$1: $(addprefix clean_%_, $(addsuffix _$1, $(LANGUAGES)))

#$$(info Create targets: $(addprefix clean_, $(addsuffix _$1, $(LANGUAGES))).)
targets_$1 = $(addprefix clean_, $(addsuffix _$1, $(LANGUAGES)))
.PHONY: $$(targets_$1)
$$(targets_$1): clean_%_$1: $(addprefix clean_, $(addsuffix _%_$1, $(DISTROS)))

#$$(info Create targets: $(addprefix clean_, $(addsuffix _cpp_$1, $(DISTROS))))
cpp_targets_$1 = $(addprefix clean_, $(addsuffix _cpp_$1, $(DISTROS)))
#$$(info Create targets: $(addprefix clean_, $(addsuffix _dotnet_$1, $(DISTROS))))
dotnet_targets_$1 = $(addprefix clean_, $(addsuffix _dotnet_$1, $(DISTROS)))
#$$(info Create targets: $(addprefix clean_, $(addsuffix _java_$1, $(DISTROS))))
java_targets_$1 = $(addprefix clean_, $(addsuffix _java_$1, $(DISTROS)))
#$$(info Create targets: $(addprefix clean_, $(addsuffix _python_$1, $(DISTROS))))
python_targets_$1 = $(addprefix clean_, $(addsuffix _python_$1, $(DISTROS)))
.PHONY: $$(cpp_targets_$1) $$(dotnet_targets_$1) $$(java_targets_$1) $$(python_targets_$1)

$$(cpp_targets_$1): clean_%_cpp_$1:
	docker image rm -f ${IMAGE}:$$*_cpp_$1 2>/dev/null
	rm -f cache/$$*/docker_cpp_$1.tar
$$(dotnet_targets_$1): clean_%_dotnet_$1:
	docker image rm -f ${IMAGE}:$$*_dotnet_$1 2>/dev/null
	rm -f cache/$$*/docker_dotnet_$1.tar
$$(java_targets_$1): clean_%_java_$1:
	docker image rm -f ${IMAGE}:$$*_java_$1 2>/dev/null
	rm -f cache/$$*/docker_java_$1.tar
$$(python_targets_$1): clean_%_python_$1:
	docker image rm -f ${IMAGE}:$$*_python_$1 2>/dev/null
	rm -f cache/$$*/docker_python_$1.tar
endef

$(foreach stage,$(STAGES),$(eval $(call make-stage-target,$(stage))))

# CLEAN
targets = $(addprefix clean_, $(DISTROS))
.PHONY: clean $(targets)
clean: $(targets)
	docker container prune -f
	docker image prune -f
	-rmdir cache
$(targets): clean_%: $(addprefix clean_%_, $(PRESTAGES)) $(addprefix clean_%_, $(STAGES))
	-rmdir cache/$*

.PHONY: distclean
distclean: clean
	-docker container rm -f $$(docker container ls -aq)
	-docker image rm -f $$(docker image ls -aq)