DIST := dist
EXECUTABLE := drone-ssh
GOFMT ?= gofumpt -l -s
GO ?= go

# for dockerhub
DEPLOY_ACCOUNT := appleboy
DEPLOY_IMAGE := $(EXECUTABLE)

TARGETS ?= linux darwin windows
ARCHS ?= amd64
SOURCES ?= $(shell find . -name "*.go" -type f)
TAGS ?=
LDFLAGS ?= -X 'main.Version=$(VERSION)'

ifneq ($(shell uname), Darwin)
	EXTLDFLAGS = -extldflags "-static" $(null)
else
	EXTLDFLAGS =
endif

ifneq ($(DRONE_TAG),)
	VERSION ?= $(DRONE_TAG)
else
	VERSION ?= $(shell git describe --tags --always || git rev-parse --short HEAD)
endif

all: build

fmt:
	@hash gofumpt > /dev/null 2>&1; if [ $$? -ne 0 ]; then \
		$(GO) get -u mvdan.cc/gofumpt; \
	fi
	$(GOFMT) -w $(SOURCES)

vet:
	$(GO) vet ./...

lint:
	@hash revive > /dev/null 2>&1; if [ $$? -ne 0 ]; then \
		$(GO) get -u github.com/mgechev/revive; \
	fi
	revive -config .revive.toml ./... || exit 1

.PHONY: misspell-check
misspell-check:
	@hash misspell > /dev/null 2>&1; if [ $$? -ne 0 ]; then \
		$(GO) get -u github.com/client9/misspell/cmd/misspell; \
	fi
	misspell -error $(SOURCES)

.PHONY: misspell
misspell:
	@hash misspell > /dev/null 2>&1; if [ $$? -ne 0 ]; then \
		$(GO) get -u github.com/client9/misspell/cmd/misspell; \
	fi
	misspell -w $(SOURCES)

.PHONY: fmt-check
fmt-check:
	@hash gofumpt > /dev/null 2>&1; if [ $$? -ne 0 ]; then \
		$(GO) get -u mvdan.cc/gofumpt; \
	fi
	@diff=$$($(GOFMT) -d $(SOURCES)); \
	if [ -n "$$diff" ]; then \
		echo "Please run 'make fmt' and commit the result:"; \
		echo "$${diff}"; \
		exit 1; \
	fi;

test: fmt-check
	@$(GO) test -v -cover -coverprofile coverage.txt ./... && echo "\n==>\033[32m Ok\033[m\n" || exit 1

install: $(SOURCES)
	$(GO) install -v -tags '$(TAGS)' -ldflags '$(EXTLDFLAGS)-s -w $(LDFLAGS)'

build: $(EXECUTABLE)

$(EXECUTABLE): $(SOURCES)
	$(GO) build -v -tags '$(TAGS)' -ldflags '$(EXTLDFLAGS)-s -w $(LDFLAGS)' -o $@

release: release-dirs release-build release-copy release-check

release-dirs:
	mkdir -p $(DIST)/binaries $(DIST)/release

release-build:
	@which gox > /dev/null; if [ $$? -ne 0 ]; then \
		$(GO) get -u github.com/mitchellh/gox; \
	fi
	gox -os="$(TARGETS)" -arch="$(ARCHS)" -tags="$(TAGS)" -ldflags="-s -w $(LDFLAGS)" -output="$(DIST)/binaries/$(EXECUTABLE)-$(VERSION)-{{.OS}}-{{.Arch}}"

release-copy:
	$(foreach file,$(wildcard $(DIST)/binaries/$(EXECUTABLE)-*),cp $(file) $(DIST)/release/$(notdir $(file));)

release-check:
	cd $(DIST)/release; $(foreach file,$(wildcard $(DIST)/release/$(EXECUTABLE)-*),sha256sum $(notdir $(file)) > $(notdir $(file)).sha256;)

build_linux_amd64:
	CGO_ENABLED=0 GOOS=linux GOARCH=amd64 $(GO) build -a -tags '$(TAGS)' -ldflags '$(EXTLDFLAGS)-s -w $(LDFLAGS)' -o release/linux/amd64/$(DEPLOY_IMAGE)

build_linux_i386:
	CGO_ENABLED=0 GOOS=linux GOARCH=386 $(GO) build -a -tags '$(TAGS)' -ldflags '$(EXTLDFLAGS)-s -w $(LDFLAGS)' -o release/linux/i386/$(DEPLOY_IMAGE)

build_linux_arm64:
	CGO_ENABLED=0 GOOS=linux GOARCH=arm64 $(GO) build -a -tags '$(TAGS)' -ldflags '$(EXTLDFLAGS)-s -w $(LDFLAGS)' -o release/linux/arm64/$(DEPLOY_IMAGE)

build_linux_arm:
	CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 $(GO) build -a -tags '$(TAGS)' -ldflags '$(EXTLDFLAGS)-s -w $(LDFLAGS)' -o release/linux/arm/$(DEPLOY_IMAGE)

docker_image:
	docker build -t $(DEPLOY_ACCOUNT)/$(DEPLOY_IMAGE) .

docker: docker_image

docker_deploy:
ifeq ($(tag),)
	@echo "Usage: make $@ tag=<tag>"
	@exit 1
endif
	# deploy image
	docker tag $(DEPLOY_ACCOUNT)/$(DEPLOY_IMAGE):latest $(DEPLOY_ACCOUNT)/$(DEPLOY_IMAGE):$(tag)
	docker push $(DEPLOY_ACCOUNT)/$(DEPLOY_IMAGE):$(tag)

ssh-server:
	adduser -h /home/drone-scp -s /bin/sh -D -S drone-scp
	echo drone-scp:1234 | chpasswd
	mkdir -p /home/drone-scp/.ssh
	chmod 700 /home/drone-scp/.ssh
	cat tests/.ssh/id_rsa.pub >> /home/drone-scp/.ssh/authorized_keys
	cat tests/.ssh/test.pub >> /home/drone-scp/.ssh/authorized_keys
	chmod 600 /home/drone-scp/.ssh/authorized_keys
	chown -R drone-scp /home/drone-scp/.ssh
	# install ssh and start server
	apk add --update openssh openrc
	rm -rf /etc/ssh/ssh_host_rsa_key /etc/ssh/ssh_host_dsa_key
	sed -i 's/^#PubkeyAuthentication yes/PubkeyAuthentication yes/g' /etc/ssh/sshd_config
	sed -i 's/AllowTcpForwarding no/AllowTcpForwarding yes/g' /etc/ssh/sshd_config
	./tests/entrypoint.sh /usr/sbin/sshd -D &

coverage:
	sed -i '/main.go/d' coverage.txt

clean:
	$(GO) clean -x -i ./...
	rm -rf coverage.txt $(EXECUTABLE) $(DIST)

version:
	@echo $(VERSION)