export DOCKER_BUILDKIT := 1
export PROGRESS_NO_TRUNC := 1
APPNAME := builder
ARCH := $(shell uname -m)
GITREV := $(shell git describe --always --dirty=-dirty)
D := $(HOME)/Documents/_SYSADMIN/docker/sneak/$(APPNAME)
BRANCH := $(shell git branch --show-current)
RN := sneak/builder
export DOCKER_IMAGE_CACHE_DIR := $(HOME)/Library/Caches/Docker/$(APPNAME)-$(ARCH)

.PHONY: default save build 

default: save

clean:
	rm -v $(D)/*.tzst

build: deps/modcache.tar
	docker build \
		-t $(RN):$(GITREV) \
		-t $(RN):latest \
		-t $(RN):$(shell git branch --show-current) \
		--progress plain --build-arg GITREV=$(GITREV) .

save: $(D)/latest.tzst $(D)/$(BRANCH).tzst

$(D)/$(BRANCH).tzst: $(D)/$(GITREV).tzst
	rm -f $@
	ln -s $(D)/$(GITREV).tzst $@

$(D)/latest.tzst: $(D)/$(GITREV).tzst
	rm -f $@
	ln -s $(D)/$(GITREV).tzst $@

$D/$(GITREV).tzst: build
	docker image inspect $(RN):$(GITREV)
	-mkdir -p "$(D)"
	docker save $(RN):$(GITREV) | pv | zstdmt -19 > $@.tmp
	mv $@.tmp $@

push:
	docker push $(RN):$(GITREV)
	docker push $(RN):latest
	docker push $(RN):$(shell git branch --show-current)

deps/modcache.tar:
	cd $(shell go env GOMODCACHE)/ && tar -c . | pv > $(PWD)/deps/modcache.tar