optimize build target

Makefile

@@ -1,7 +1,7 @@
 ##
 #
 .DEFAULT_GOAL := help
-.PHONY: generate
+.PHONY: generate go-tools
 
 version    := $(shell git describe --tags --always)
 revision   := $(shell git rev-parse HEAD)
@@ -11,6 +11,9 @@ builddate  := $(shell date '+%FT%T_%Z')
 
 versionPkgPrefix := mystrom-exporter/pkg/version
 
+BINDIR    := $(CURDIR)/output
+GO        ?= go
+GOPATH    ?= $(shell $(GO) env GOPATH)
 LDFLAGS   := -w -s \
 	-X $(versionPkgPrefix).Version=${version} \
 	-X $(versionPkgPrefix).Revision=${revision} \
@@ -18,25 +21,36 @@ LDFLAGS   := -w -s \
 	-X $(versionPkgPrefix).BuildUser=${builduser} \
 	-X $(versionPkgPrefix).BuildDate=${builddate}
 GOFLAGS   := -v
+GOX_FLAGS          := -mod=vendor
+GO_BUILD_FLAGS     := -v
+export GO111MODULE := on
 
-linux: generate ## builds the linux version of the exporter
-	GOOS=linux GOARCH=amd64 go build $(GOFLAGS) -ldflags '$(LDFLAGS)'
-mac: generate ## builds the macos version of the exporter
-	GOOS=darwin GOARCH=amd64 go build $(GOFLAGS) -ldflags '$(LDFLAGS)'
-mac-arm: generate ## builds the macos (m1) version of the exporter
-	GOOS=darwin GOARCH=arm64 go build $(GOFLAGS) -ldflags '$(LDFLAGS)'
-arm64: generate
-	GOOS=linux GOARCH=arm64 go build $(GOFLAGS) -ldflags '$(LDFLAGS)'
-arm: generate
-	GOOS=linux GOARCH=arm go build $(GOFLAGS) -ldflags '$(LDFLAGS)'
+build: go-tools generate ## builds the all platform binaries of the exporter
+	$(GOPATH)/bin/gox \
+			-os="darwin linux" \
+			-arch="amd64 arm arm64" \
+			-osarch="!darwin/arm" \
+			-output "${BINDIR}/{{.Dir}}-{{.OS}}-{{.Arch}}" \
+			-gcflags "$(GO_BUILD_FLAGS)" \
+			-ldflags '$(LDFLAGS)' \
+			-tags '$(TAGS)' \
+			./...
+
+run:
+	${BINDIR}/mystrom-exporter-$(shell $(GO) env GOOS)-$(shell $(GO) env GOARCH)
+
+
+generate: go-tools
+	$(GO) generate ./...
+
+go-tools: $(GOPATH)/bin/stringer $(GOPATH)/bin/gox
 
 # -- see more info on https://pkg.go.dev/golang.org/x/tools/cmd/stringer
-generate: $(GOPATH)/bin/stringer
-	go generate ./...
-
 $(GOPATH)/bin/stringer:
-	go install golang.org/x/tools/cmd/stringer@latest
+	$(GO) install golang.org/x/tools/cmd/stringer@latest
 
+$(GOPATH)/bin/gox:
+	$(GO) install github.com/mitchellh/gox@latest
 # --
 help:
 	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST)  | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}'