Update Makefile

Makefile

@@ -1,16 +1,17 @@
 # Project information
-OWNER    = "tomohiro"
-PACKAGE  = $(shell basename $(PWD))
-VERSION  = $(shell git describe --abbrev=0 --tags)
+OWNER    := tomohiro
+PACKAGE  := $(shell basename $(PWD))
+VERSION  := $(shell git describe --abbrev=0 --tags)
 
 # Build information
-DIST_DIR    = $(PWD)/dist
-ASSETS_DIR  = $(DIST_DIR)/$(VERSION)
-XC_OS       = "linux darwin"
-XC_ARCH     = "386 amd64"
-BUILD_FLAGS = "-w -s"
+DIST_DIR    := $(PWD)/dist
+ASSETS_DIR  := $(DIST_DIR)/$(VERSION)
+XC_OS       := "linux darwin"
+XC_ARCH     := "386 amd64"
+BUILD_FLAGS := "-w -s"
 
 # Tasks
+.PHONY: help
 help:
 	@echo "Please type: make [target]"
 	@echo "  setup        Setup development environment"
@@ -23,46 +24,50 @@ help:
 	@echo "  clean        Clean assets"
 	@echo "  help         Show this help messages"
 
+.PHONY: setup
 setup:
 	@echo "===> Setup development tools..."
-
-	# goxz - Just do cross building and archiving go tools conventionally
+	# Install goxz - Just do cross building and archiving go tools conventionally
 	GO111MODULE=off go get -u github.com/Songmu/goxz/cmd/goxz
-
-	# ghr - Upload multiple artifacts to GitHub Release in parallel
+	# Install ghr - Upload multiple artifacts to GitHub Release in parallel
 	GO111MODULE=off go get -u github.com/tcnksm/ghr
 
+.PHONY: deps
 deps:
 	@echo "===> Installing runtime dependencies..."
 	go mod download
 
+.PHONY: updatedeps
 updatedeps:
 	@echo "===> Updating runtime dependencies..."
 	go get -u
 
+.PHONY: lint
 lint: deps
 	@echo "===> Running lint..."
 	go vet ./...
 	golint -set_exit_status ./...
 
+.PHONY: test
 test: deps
 	@echo "===> Running tests..."
 	go test -v -cover ./...
 
+.PHONY: dist
 dist: deps
 	@echo "===> Shipping packages as release assets..."
-	goxz -d $(ASSETS_DIR) -z -os $(XC_OS) -arch $(XC_ARCH) --build-ldflags=$(BUILD_LDFLAGS)
+	goxz -z -d $(ASSETS_DIR) -os $(XC_OS) -arch $(XC_ARCH) --build-ldflags=$(BUILD_FLAGS)
 	pushd $(ASSETS_DIR); \
 	shasum -a 256 *.zip > ./$(VERSION)_SHA256SUMS; \
 	popd
 
+.PHONY: release
 release:
 	@echo "===> Publishing release assets to GitHub..."
 	ghr -u $(OWNER) -r $(PACKAGE) $(VERSION) $(ASSETS_DIR)
 
+.PHONY: clean
 clean:
 	@echo "===> Cleaning assets..."
 	go clean
 	rm -rf $(DIST_DIR)
-
-.PHONY: help setup deps updatedeps test dist release clean