add package versions to makefile

Makefile

@@ -3,10 +3,29 @@ PKG := github.com/compose/governor
 PKG_LIST := $(shell go list ${PKG}/... | grep -v /vendor/)
 GO_FILES := $(shell find . -name '*.go' | grep -v /vendor/)
 VERSION := $(shell git describe --tags)
+RELEASES := windows|amd64 linux|amd64 linux|arm
 
-release: vet lint test build
+release: vet lint test build package-releases
 
-build:
+package-releases:
+	$(foreach release,$(RELEASES), \
+		$(call release-version,$(firstword $(subst |, ,$(release))),\
+					$(lastword $(subst |, ,$(release))))\
+	)
+
+define release-version
+	@echo "Building release for $(strip $(1)):$(strip $(2))"
+	mkdir -p ./build
+	GOOS=$(strip $(1)) GOARCH=$(strip $(2)) go build -v -o ./build/${OUT} -ldflags "-X main.version=${VERSION}" ${PKG}
+	tar -C ./build -cvzf ./build/governor-${VERSION}-$(strip $(1))-$(strip $(2)).tar.gz ${OUT}
+	rm ./build/${OUT}
+
+endef
+
+
+build: build-native
+
+build-native:
 	go build -v -o ${OUT} -ldflags "-X main.version=${VERSION}" ${PKG}
 
 vet: