From 5670d2db53723941feed3ad86f3c4624ee2043cd Mon Sep 17 00:00:00 2001
From: Adam Reese <adam@reese.io>
Date: Wed, 25 May 2016 12:30:25 -0700
Subject: [PATCH] feat(version): statically link version at build time

---
 cmd/helm/version.go    | 21 +++++++++++++++++++++
 pkg/version/version.go | 10 ++++++++++
 versioning.mk          | 35 ++++++++++++++++++++++-------------
 3 files changed, 53 insertions(+), 13 deletions(-)
 create mode 100644 cmd/helm/version.go
 create mode 100644 pkg/version/version.go

diff --git a/cmd/helm/version.go b/cmd/helm/version.go
new file mode 100644
index 000000000..78556f6fb
--- /dev/null
+++ b/cmd/helm/version.go
@@ -0,0 +1,21 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/kubernetes/helm/pkg/version"
+
+	"github.com/spf13/cobra"
+)
+
+func init() {
+	RootCommand.AddCommand(versionCmd)
+}
+
+var versionCmd = &cobra.Command{
+	Use:   "version",
+	Short: "Print the client version information.",
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Println(version.Version)
+	},
+}
diff --git a/pkg/version/version.go b/pkg/version/version.go
new file mode 100644
index 000000000..890c045f6
--- /dev/null
+++ b/pkg/version/version.go
@@ -0,0 +1,10 @@
+// Package version represents the current version of the project.
+package version
+
+// Version is the current version of the Helm.
+// Update this whenever making a new release.
+// The version is of the format Major.Minor.Patch
+// Increment major number for new feature additions and behavioral changes.
+// Increment minor number for bug fixes and performance enhancements.
+// Increment patch number for critical fixes to existing releases.
+var Version = "v2.0.0-alpha.1"
diff --git a/versioning.mk b/versioning.mk
index 4ceb1c0d9..e04b99822 100644
--- a/versioning.mk
+++ b/versioning.mk
@@ -1,11 +1,28 @@
 MUTABLE_VERSION ?= canary
-VERSION ?= git-$(shell git rev-parse --short HEAD)
 
-IMAGE := ${DOCKER_REGISTRY}/${IMAGE_PREFIX}/${SHORT_NAME}:${VERSION}
+GIT_SHA := $(shell git rev-parse --short HEAD)
+GIT_TAG := $(shell git describe --tags --abbrev=0 2>/dev/null)
+
+ifdef VERSION
+	DOCKER_VERSION = $(VERSION)
+	BINARY_VERSION = $(VERSION)
+endif
+
+DOCKER_VERSION ?= git-${GIT_SHA}
+BINARY_VERSION ?= ${GIT_TAG}+${GIT_SHA}
+
+IMAGE := ${DOCKER_REGISTRY}/${IMAGE_PREFIX}/${SHORT_NAME}:${DOCKER_VERSION}
 MUTABLE_IMAGE := ${DOCKER_REGISTRY}/${IMAGE_PREFIX}/${SHORT_NAME}:${MUTABLE_VERSION}
 
+LDFLAGS += -X github.com/kubernetes/helm/pkg/version.Version=${BINARY_VERSION}
+
+DOCKER_PUSH = docker push
+ifeq ($(DOCKER_REGISTRY),gcr.io)
+	DOCKER_PUSH = gcloud docker push
+endif
+
 info:
-	@echo "Build tag:       ${VERSION}"
+	@echo "Build tag:       ${DOCKER_VERSION}"
 	@echo "Registry:        ${DOCKER_REGISTRY}"
 	@echo "Immutable tag:   ${IMAGE}"
 	@echo "Mutable tag:     ${MUTABLE_IMAGE}"
@@ -15,16 +32,8 @@ docker-push: docker-mutable-push docker-immutable-push
 
 .PHONY: docker-immutable-push
 docker-immutable-push:
-ifeq ($(DOCKER_REGISTRY),gcr.io)
-	gcloud docker push ${IMAGE}
-else
-	docker push ${IMAGE}
-endif
+	${DOCKER_PUSH} ${IMAGE}
 
 .PHONY: docker-mutable-push
 docker-mutable-push:
-ifeq ($(DOCKER_REGISTRY),gcr.io)
-	gcloud docker push ${MUTABLE_IMAGE}
-else
-	docker push ${MUTABLE_IMAGE}
-endif
+	${DOCKER_PUSH} ${MUTABLE_IMAGE}