EXECUTABLE ?= example-go
SOURCES ?= $(shell find . -name "*.go" -type f)
DIST := dist
DIST_DIRS := $(DIST)/binaries $(DIST)/release
GO ?= go
TAGS ?=
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

STORED_VERSION_FILE := VERSION

ifneq ($(DRONE_TAG),)
	VERSION ?= $(subst v,,$(DRONE_TAG))
	RELASE_VERSION ?= $(VERSION)
else
	ifneq ($(DRONE_BRANCH),)
		VERSION ?= $(subst release/v,,$(DRONE_BRANCH))
	else
		VERSION ?= main
	endif

	STORED_VERSION=$(shell cat $(STORED_VERSION_FILE) 2>/dev/null)
	ifneq ($(STORED_VERSION),)
		RELASE_VERSION ?= $(STORED_VERSION)
	else
		RELASE_VERSION ?= $(shell git describe --tags --always | sed 's/-/+/' | sed 's/^v//')
	endif
endif

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

build: $(EXECUTABLE)

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

docker-build: docker-build-linux-amd64 docker-build-linux-arm64

docker-build-linux-amd64:
	CGO_ENABLED=0 GOOS=linux GOARCH=amd64 $(GO) build -v -tags '$(TAGS)' -ldflags '$(EXTLDFLAGS)-s -w $(LDFLAGS)' -o release/linux/amd64/$(EXECUTABLE) ./cmd/$(EXECUTABLE)
docker-build-linux-arm64:
	CGO_ENABLED=0 GOOS=linux GOARCH=arm64 $(GO) build -v -tags '$(TAGS)' -ldflags '$(EXTLDFLAGS)-s -w $(LDFLAGS)' -o release/linux/arm64/$(EXECUTABLE) ./cmd/$(EXECUTABLE)

test:
	@$(GO) test -cover -tags '$(TAGS)' ./... && echo "\n==>\033[32m Ok\033[m\n" || exit 1

# install air command
.PHONY: air
air:
	@hash air > /dev/null 2>&1; if [ $$? -ne 0 ]; then \
		$(GO) install github.com/cosmtrek/air@latest; \
	fi

# run air
.PHONY: dev
dev: air
	air --build.cmd "make build" --build.bin bin/$(EXECUTABLE)

.PHONY: release-clean
release-clean:
	rm -rf $(DIST)

clean: release-clean