Update Makefile to release and build for multiple platforms

Makefile

@@ -1,13 +1,49 @@
-all: build
+REGISTRY?=directxman12
+IMAGE?=k8s-prometheus-adapter
+TEMP_DIR:=$(shell mktemp -d)
+ARCH?=amd64
+ALL_ARCH=amd64 arm arm64 ppc64le s390x
+ML_PLATFORMS=linux/amd64,linux/arm,linux/arm64,linux/ppc64le,linux/s390x
 
+VERSION?=latest
+
+ifeq ($(ARCH),amd64)
+	BASEIMAGE?=busybox
+endif
+ifeq ($(ARCH),arm)
+	BASEIMAGE?=armhf/busybox
+endif
+ifeq ($(ARCH),arm64)
+	BASEIMAGE?=aarch64/busybox
+endif
+ifeq ($(ARCH),ppc64le)
+	BASEIMAGE?=ppc64le/busybox
+endif
+ifeq ($(ARCH),s390x)
+	BASEIMAGE?=s390x/busybox
+endif
+
+all: docker-build
 build:
-	go build cmd/adapter.go
-.PHONY: build
+	CGO_ENABLED=0 GOARCH=$(ARCH) go build -a -tags netgo -o /build/adapter github.com/directxman12/k8s-prometheus-adapter/cmd
 
-docker-build: adapter
-	docker build -t cm-adapter -f deploy/Dockerfile .	
-.PHONY: docker-build
+docker-build:
+	cp deploy/Dockerfile $(TEMP_DIR)
+	cd $(TEMP_DIR) && sed -i "s|BASEIMAGE|$(BASEIMAGE)|g" Dockerfile
 
-clean:
-	rm adapter
-.PHONY: clean
+	docker run -it -v $(TEMP_DIR):/build -v $(shell pwd):/go/src/github.com/directxman12/k8s-prometheus-adapter -e GOARCH=$(ARCH) golang:1.8 /bin/bash -c "\
+		CGO_ENABLED=0 go build -a -tags netgo -o /build/adapter github.com/directxman12/k8s-prometheus-adapter/cmd"
+
+	docker build -t $(REGISTRY)/$(IMAGE)-$(ARCH):$(VERSION) $(TEMP_DIR)
+	sudo rm -r $(TEMP_DIR)
+
+push-%:
+	$(MAKE) ARCH=$* docker-build
+	docker push $(REGISTRY)/$(IMAGE)-$*:$(VERSION)
+
+push: ./manifest-tool $(addprefix push-,$(ALL_ARCH))
+	./manifest-tool push from-args --platforms $(ML_PLATFORMS) --template $(REGISTRY)/$(IMAGE)-ARCH:$(VERSION) --target $(REGISTRY)/$(IMAGE):$(VERSION)
+
+./manifest-tool:
+	curl -sSL https://github.com/estesp/manifest-tool/releases/download/v0.5.0/manifest-tool-linux-amd64 > manifest-tool
+	chmod +x manifest-tool

deploy/Dockerfile

@@ -1,8 +1,4 @@
-FROM scratch
-
+FROM BASEIMAGE
 COPY adapter /
-
 USER 1001:1001
-
 ENTRYPOINT ["/adapter"]
-