refactoring makefile, also adding test (#71)

Makefile

@@ -1,9 +1,24 @@
-pull:
-	git pull
+DATE    ?= $(shell date +%FT%T%z)
+VERSION ?= $(git describe --tags --always --dirty --match=v* 2> /dev/null || \
+			cat $(CURDIR)/.version 2> /dev/null || echo "v0")
 
-build:
-	go build -o bin/dashboard .
+.PHONY: test
+test: ; $(info $(M) start unit testing...) @
+	@go test $$(go list ./... | grep -v /mocks/) --race -v -short -coverprofile=profile.cov
+	@echo "\n*****************************"
+	@echo "**  TOTAL COVERAGE: $$(go tool cover -func profile.cov | grep total | grep -Eo '[0-9]+\.[0-9]+')%  **"
+	@echo "*****************************\n"
 
+.PHONY: pull
+pull: ; $(info $(M) Pulling source...) @
+	@git pull
 
-debug:
-	 DEBUG=1 ./bin/dashboard
+.PHONY: build
+build: $(BIN) ; $(info $(M) Building executable...) @ ## Build program binary
+	$Q $(GO) build \
+		-ldflags '-X main.version=$(VERSION) -X main.buildDate=$(DATE)' \
+		-o bin/dashboard .
+
+.PHONY: debug
+debug: ; $(info $(M) Running dashboard in debug mode...) @
+	@DEBUG=1 ./bin/dashboard