ref(Makefile): cleanup and consolidate

Makefile

-TARGETS           ?= darwin/amd64 linux/amd64 linux/386 linux/arm linux/arm64 linux/ppc64le windows/amd64
-DIST_DIRS         = find * -type d -exec
-APP               = helm
+BINDIR     := $(CURDIR)/bin
+DIST_DIRS  := find * -type d -exec
+TARGETS    := darwin/amd64 linux/amd64 linux/386 linux/arm linux/arm64 linux/ppc64le windows/amd64
 
 # go option
-GO        ?= go
-PKG       := $(shell glide novendor)
-TAGS      :=
-TESTS     := .
-TESTFLAGS :=
-LDFLAGS   := -w -s
-GOFLAGS   :=
-BINDIR    := $(CURDIR)/bin
-BINARIES  := helm
+GO         ?= go
+PKG        := ./...
+TAGS       :=
+TESTS      := .
+TESTFLAGS  :=
+LDFLAGS    := -w -s
+GOFLAGS    :=
 
 # Required for globs to work correctly
-SHELL=/bin/bash
+SHELL      = /bin/bash
+
+GIT_COMMIT = $(shell git rev-parse HEAD)
+GIT_SHA    = $(shell git rev-parse --short HEAD)
+GIT_TAG    = $(shell git describe --tags --abbrev=0 --exact-match 2>/dev/null)
+GIT_DIRTY  = $(shell test -n "`git status --porcelain`" && echo "dirty" || echo "clean")
+
+ifdef VERSION
+	BINARY_VERSION = $(VERSION)
+endif
+BINARY_VERSION ?= ${GIT_TAG}
+
+# Only set Version if building a tag or VERSION is set
+ifneq ($(BINARY_VERSION),)
+	LDFLAGS += -X k8s.io/helm/pkg/version.Version=${BINARY_VERSION}
+endif
+
+# Clear the "unreleased" string in BuildMetadata
+ifneq ($(GIT_TAG),)
+	LDFLAGS += -X k8s.io/helm/pkg/version.BuildMetadata=
+endif
+LDFLAGS += -X k8s.io/helm/pkg/version.GitCommit=${GIT_COMMIT}
+LDFLAGS += -X k8s.io/helm/pkg/version.GitTreeState=${GIT_DIRTY}
 
 .PHONY: all
 all: build
 
 .PHONY: build
 build:
-	GOBIN=$(BINDIR) $(GO) install $(GOFLAGS) -tags '$(TAGS)' -ldflags '$(LDFLAGS)' k8s.io/helm/cmd/...
+	$(GO) build $(GOFLAGS) -tags '$(TAGS)' -ldflags '$(LDFLAGS)' -o $(BINDIR)/helm k8s.io/helm/cmd/helm
 
-# usage: make clean build-cross dist APP=helm|tiller VERSION=v2.0.0-alpha.3
 .PHONY: build-cross
 build-cross: LDFLAGS += -extldflags "-static"
 build-cross:
-	CGO_ENABLED=0 gox -parallel=3 -output="_dist/{{.OS}}-{{.Arch}}/{{.Dir}}" -osarch='$(TARGETS)' $(GOFLAGS) -tags '$(TAGS)' -ldflags '$(LDFLAGS)' k8s.io/helm/cmd/$(APP)
+	CGO_ENABLED=0 gox -parallel=3 -output="_dist/{{.OS}}-{{.Arch}}/{{.Dir}}" -osarch='$(TARGETS)' $(GOFLAGS) -tags '$(TAGS)' -ldflags '$(LDFLAGS)' k8s.io/helm/cmd/helm
 
 .PHONY: dist
 dist:
@@ -84,16 +103,20 @@ HAS_GIT := $(shell command -v git;)
 
 .PHONY: bootstrap
 bootstrap:
+ifndef HAS_GIT
+	$(error You must install Git)
+endif
 ifndef HAS_GLIDE
 	go get -u github.com/Masterminds/glide
 endif
 ifndef HAS_GOX
 	go get -u github.com/mitchellh/gox
 endif
-
-ifndef HAS_GIT
-	$(error You must install Git)
-endif
 	glide install --strip-vendor
 
-include versioning.mk
+.PHONY: info
+info:
+	 @echo "Version:           ${VERSION}"
+	 @echo "Git Tag:           ${GIT_TAG}"
+	 @echo "Git Commit:        ${GIT_COMMIT}"
+	 @echo "Git Tree State:    ${GIT_DIRTY}"

versioning.mk

-GIT_COMMIT = $(shell git rev-parse HEAD)
-GIT_SHA    = $(shell git rev-parse --short HEAD)
-GIT_TAG    = $(shell git describe --tags --abbrev=0 --exact-match 2>/dev/null)
-GIT_DIRTY  = $(shell test -n "`git status --porcelain`" && echo "dirty" || echo "clean")
-
-ifdef VERSION
-	BINARY_VERSION = $(VERSION)
-endif
-
-BINARY_VERSION ?= ${GIT_TAG}
-
-# Only set Version if building a tag or VERSION is set
-ifneq ($(BINARY_VERSION),)
-	LDFLAGS += -X k8s.io/helm/pkg/version.Version=${BINARY_VERSION}
-endif
-
-# Clear the "unreleased" string in BuildMetadata
-ifneq ($(GIT_TAG),)
-	LDFLAGS += -X k8s.io/helm/pkg/version.BuildMetadata=
-endif
-LDFLAGS += -X k8s.io/helm/pkg/version.GitCommit=${GIT_COMMIT}
-LDFLAGS += -X k8s.io/helm/pkg/version.GitTreeState=${GIT_DIRTY}
-
-info:
-	 @echo "Version:           ${VERSION}"
-	 @echo "Git Tag:           ${GIT_TAG}"
-	 @echo "Git Commit:        ${GIT_COMMIT}"
-	 @echo "Git Tree State:    ${GIT_DIRTY}"