From ee1a0cc3cc949b3745e8ed1a18e969f7d6944f82 Mon Sep 17 00:00:00 2001
From: Christian Svensson <blue@cmd.nu>
Date: Wed, 3 Aug 2016 21:23:02 +0200
Subject: [PATCH] Allow overrides for GO and PROMU

This allows the user to override how/where promu and/or go is invoked.
---
 Makefile | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/Makefile b/Makefile
index a8542404..a02a8428 100644
--- a/Makefile
+++ b/Makefile
@@ -11,8 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-GO    := GO15VENDOREXPERIMENT=1 go
-PROMU := $(GOPATH)/bin/promu
+GO    ?= GO15VENDOREXPERIMENT=1 go
+PROMU ?= $(GOPATH)/bin/promu
 pkgs   = $(shell $(GO) list ./... | grep -v /vendor/)
 
 PREFIX                  ?= $(shell pwd)
@@ -43,11 +43,11 @@ vet:
 	@echo ">> vetting code"
 	@$(GO) vet $(pkgs)
 
-build: promu
+build: $(PROMU)
 	@echo ">> building binaries"
 	@$(PROMU) build --prefix $(PREFIX)
 
-tarball: promu
+tarball: $(PROMU)
 	@echo ">> building release tarball"
 	@$(PROMU) tarball --prefix $(PREFIX) $(BIN_DIR)
 
@@ -55,10 +55,10 @@ docker:
 	@echo ">> building docker image"
 	@docker build -t "$(DOCKER_IMAGE_NAME):$(DOCKER_IMAGE_TAG)" .
 
-promu:
+$(GOPATH)/bin/promu promu:
 	@GOOS=$(shell uname -s | tr A-Z a-z) \
 		GOARCH=$(subst x86_64,amd64,$(patsubst i%86,386,$(shell uname -m))) \
 		$(GO) get -u github.com/prometheus/promu
 
 
-.PHONY: all style format build test test-e2e vet tarball docker promu
+.PHONY: all style format build test test-e2e vet tarball docker promu $(GOPATH)/bin/promu