EXECUTABLE := drone-scp
GOFMT ?= gofumpt -l -s -w
GO ?= go
GOFILES := $(shell find . -name "*.go" -type f)
HAS_GO = $(shell hash $(GO) > /dev/null 2>&1 && echo "GO" || echo "NOGO" )

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

ifeq ($(HAS_GO), GO)
	GOPATH ?= $(shell $(GO) env GOPATH)
	export PATH := $(GOPATH)/bin:$(PATH)

	CGO_EXTRA_CFLAGS := -DSQLITE_MAX_VARIABLE_NUMBER=32766
	CGO_CFLAGS ?= $(shell $(GO) env CGO_CFLAGS) $(CGO_EXTRA_CFLAGS)
endif

ifeq ($(OS), Windows_NT)
	GOFLAGS := -v -buildmode=exe
	EXECUTABLE ?= $(EXECUTABLE).exe
else ifeq ($(OS), Windows)
	GOFLAGS := -v -buildmode=exe
	EXECUTABLE ?= $(EXECUTABLE).exe
else
	GOFLAGS := -v
	EXECUTABLE ?= $(EXECUTABLE)
endif

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

TAGS ?=
LDFLAGS ?= -X 'main.Version=$(VERSION)'

all: build

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

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

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

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

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

build: $(EXECUTABLE)

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

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)

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
	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
	sed -i 's/^#ListenAddress 0.0.0.0/ListenAddress 0.0.0.0/g' /etc/ssh/sshd_config
	sed -i 's/^#ListenAddress ::/ListenAddress ::/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)