# Makefile for Docker tests

.PHONY: docker docker-test docker-clean docker-image docker-qemu-src

DOCKER_SUFFIX := .docker
DOCKER_FILES_DIR := $(SRC_PATH)/tests/docker/dockerfiles
DOCKER_IMAGES := $(notdir $(basename $(wildcard $(DOCKER_FILES_DIR)/*.docker)))
DOCKER_TARGETS := $(patsubst %,docker-image-%,$(DOCKER_IMAGES))
# Use a global constant ccache directory to speed up repetitive builds
DOCKER_CCACHE_DIR := $$HOME/.cache/qemu-docker-ccache

DOCKER_TESTS := $(notdir $(shell \
	find $(SRC_PATH)/tests/docker/ -name 'test-*' -type f))

DOCKER_TOOLS := travis

TESTS ?= %
IMAGES ?= %

# Make archive from git repo $1 to tar.gz $2
make-archive-maybe = $(if $(wildcard $1/*), \
	$(call quiet-command, \
		(cd $1; if git diff-index --quiet HEAD -- &>/dev/null; then \
			git archive -1 HEAD --format=tar.gz -o $2; \
		else \
			git archive -1 $$(git stash create) --format=tar.gz -o $2; \
		fi), \
		"  ARCHIVE $(notdir $2)"))

CUR_TIME := $(shell date +%Y-%m-%d-%H.%M.%S.$$$$)
# Makes the definition constant after the first expansion
DOCKER_SRC_COPY = $(eval DOCKER_SRC_COPY := docker-src.$(CUR_TIME))$(DOCKER_SRC_COPY)

$(DOCKER_SRC_COPY):
	@mkdir $@
	$(call make-archive-maybe, $(SRC_PATH), $@/qemu.tgz)
	$(call make-archive-maybe, $(SRC_PATH)/dtc, $@/dtc.tgz)
	$(call make-archive-maybe, $(SRC_PATH)/pixman, $@/pixman.tgz)
	$(call quiet-command, cp $(SRC_PATH)/tests/docker/run $@/run, \
		"  COPY RUNNER")

docker-qemu-src: $(DOCKER_SRC_COPY)

docker-image: ${DOCKER_TARGETS}

# General rule for building docker images
docker-image-%: $(DOCKER_FILES_DIR)/%.docker
	$(call quiet-command,\
		$(SRC_PATH)/tests/docker/docker.py build qemu:$* $< \
		$(if $V,,--quiet) $(if $(NOCACHE),--no-cache),\
		"  BUILD $*")

# Expand all the pre-requistes for each docker image and test combination
$(foreach i,$(DOCKER_IMAGES), \
	$(foreach t,$(DOCKER_TESTS) $(DOCKER_TOOLS), \
		$(eval .PHONY: docker-$t@$i) \
		$(eval docker-$t@$i: docker-image-$i docker-run-$t@$i) \
	) \
	$(foreach t,$(DOCKER_TESTS), \
		$(eval docker-test: docker-$t@$i) \
	) \
)

docker:
	@echo 'Build QEMU and run tests inside Docker containers'
	@echo
	@echo 'Available targets:'
	@echo
	@echo '    docker:              Print this help.'
	@echo '    docker-test:         Run all image/test combinations.'
	@echo '    docker-clean:        Kill and remove residual docker testing containers.'
	@echo '    docker-TEST@IMAGE:   Run "TEST" in container "IMAGE".'
	@echo '                         Note: "TEST" is one of the listed test name,'
	@echo '                         or a script name under $$QEMU_SRC/tests/docker/;'
	@echo '                         "IMAGE" is one of the listed container name."'
	@echo '    docker-image:        Build all images.'
	@echo '    docker-image-IMAGE:  Build image "IMAGE".'
	@echo
	@echo 'Available container images:'
	@echo '    $(DOCKER_IMAGES)'
	@echo
	@echo 'Available tests:'
	@echo '    $(DOCKER_TESTS)'
	@echo
	@echo 'Available tools:'
	@echo '    $(DOCKER_TOOLS)'
	@echo
	@echo 'Special variables:'
	@echo '    TARGET_LIST=a,b,c    Override target list in builds.'
	@echo '    IMAGES="a b c ..":   Filters which images to build or run.'
	@echo '    TESTS="x y z .."     Filters which tests to run (for docker-test).'
	@echo '    J=[0..9]*            Overrides the -jN parameter for make commands'
	@echo '                         (default is 1)'
	@echo '    DEBUG=1              Stop and drop to shell in the created container'
	@echo '                         before running the command.'
	@echo '    NOCACHE=1            Ignore cache when build images.'

docker-run-%: CMD = $(shell echo '$@' | sed -e 's/docker-run-\([^@]*\)@\(.*\)/\1/')
docker-run-%: IMAGE = $(shell echo '$@' | sed -e 's/docker-run-\([^@]*\)@\(.*\)/\2/')
docker-run-%: docker-qemu-src
	@mkdir -p "$(DOCKER_CCACHE_DIR)"
	@if test -z "$(IMAGE)" || test -z "$(CMD)"; \
		then echo "Invalid target"; exit 1; \
	fi
	$(if $(filter $(TESTS),$(CMD)),$(if $(filter $(IMAGES),$(IMAGE)), \
		$(call quiet-command,\
			$(SRC_PATH)/tests/docker/docker.py run $(if $V,,--rm) \
				-t \
				$(if $(DEBUG),-i,--net=none) \
				-e TARGET_LIST=$(TARGET_LIST) \
				-e V=$V -e J=$J -e DEBUG=$(DEBUG)\
				-e CCACHE_DIR=/var/tmp/ccache \
				-v $$(realpath $(DOCKER_SRC_COPY)):/var/tmp/qemu:z$(COMMA)ro \
				-v $(DOCKER_CCACHE_DIR):/var/tmp/ccache:z \
				-w /var/tmp/qemu \
				qemu:$(IMAGE) \
				$(if $V,/bin/bash -x ,) \
				./run \
				$(CMD); \
			, "  RUN $(CMD) in $(IMAGE)")))

docker-clean:
	$(call quiet-command, $(SRC_PATH)/tests/docker/docker.py clean)