APP_NAME := ric930-fake-smtp

BUILD_DIR := builds
LINUX_DIR := $(BUILD_DIR)/linux
WINDOWS_DIR := $(BUILD_DIR)/windows

LINUX_BIN := $(LINUX_DIR)/$(APP_NAME)
WINDOWS_BIN := $(WINDOWS_DIR)/$(APP_NAME).exe

GO := go

BUILD_FLAGS := -trimpath
LDFLAGS := -s -w

.PHONY: all
.PHONY: build
.PHONY: build-all
.PHONY: build-linux
.PHONY: build-windows
.PHONY: clean
.PHONY: fmt
.PHONY: tidy
.PHONY: check


# ------------------------------------------------------------
# Host OS
# ------------------------------------------------------------

ifeq ($(OS),Windows_NT)

define remove_dir
	@if exist "$(subst /,\,$(1))" rmdir /S /Q "$(subst /,\,$(1))"
endef

define make_dir
	@if not exist "$(subst /,\,$(1))" mkdir "$(subst /,\,$(1))"
endef

define copy_file
	@copy /Y "$(subst /,\,$(1))" "$(subst /,\,$(2))" >NUL
endef

define copy_dir
	@if exist "$(subst /,\,$(2))" rmdir /S /Q "$(subst /,\,$(2))"
	@xcopy /E /I /Y "$(subst /,\,$(1))" "$(subst /,\,$(2))" >NUL
endef

else

define remove_dir
	@rm -rf "$(1)"
endef

define make_dir
	@mkdir -p "$(1)"
endef

define copy_file
	@cp "$(1)" "$(2)"
endef

define copy_dir
	@rm -rf "$(2)"
	@cp -R "$(1)" "$(2)"
endef

endif


# ------------------------------------------------------------
# Default
# ------------------------------------------------------------

all: build-all

build: build-all

build-all: build-linux build-windows


# ------------------------------------------------------------
# Linux
# ------------------------------------------------------------

build-linux:
	@echo "==> Building Linux amd64"

	$(call remove_dir,$(LINUX_DIR))
	$(call make_dir,$(LINUX_DIR))

ifeq ($(OS),Windows_NT)
	@set "CGO_ENABLED=0" && \
	set "GOOS=linux" && \
	set "GOARCH=amd64" && \
	$(GO) build $(BUILD_FLAGS) -ldflags="$(LDFLAGS)" -o "$(subst /,\,$(LINUX_BIN))" .
else
	@CGO_ENABLED=0 \
	GOOS=linux \
	GOARCH=amd64 \
	$(GO) build $(BUILD_FLAGS) -ldflags="$(LDFLAGS)" -o "$(LINUX_BIN)" .
endif

	$(call copy_file,config.yaml,$(LINUX_DIR)/config.yaml)
	$(call copy_dir,web,$(LINUX_DIR)/web)

	@echo "==> Linux build created: $(LINUX_DIR)"


# ------------------------------------------------------------
# Windows
# ------------------------------------------------------------

build-windows:
	@echo "==> Building Windows amd64"

	$(call remove_dir,$(WINDOWS_DIR))
	$(call make_dir,$(WINDOWS_DIR))

ifeq ($(OS),Windows_NT)
	@set "CGO_ENABLED=0" && \
	set "GOOS=windows" && \
	set "GOARCH=amd64" && \
	$(GO) build $(BUILD_FLAGS) -ldflags="$(LDFLAGS)" -o "$(subst /,\,$(WINDOWS_BIN))" .
else
	@CGO_ENABLED=0 \
	GOOS=windows \
	GOARCH=amd64 \
	$(GO) build $(BUILD_FLAGS) -ldflags="$(LDFLAGS)" -o "$(WINDOWS_BIN)" .
endif

	$(call copy_file,config.yaml,$(WINDOWS_DIR)/config.yaml)
	$(call copy_dir,web,$(WINDOWS_DIR)/web)

	@echo "==> Windows build created: $(WINDOWS_DIR)"


# ------------------------------------------------------------
# Maintenance
# ------------------------------------------------------------

clean:
	@echo "==> Cleaning builds"
	$(call remove_dir,$(BUILD_DIR))


fmt:
	@echo "==> Formatting Go sources"
	@$(GO) fmt ./...


tidy:
	@echo "==> Updating Go modules"
	@$(GO) mod tidy


check:
	@echo "==> Checking project"
	@$(GO) vet ./...
	@$(GO) test ./...