From 9dd20346018f8c8f8f78eeb881a3f42a2af371ee Mon Sep 17 00:00:00 2001
From: James Phillips <jamesdphillips@gmail.com>
Date: Fri, 1 Sep 2017 14:24:59 -0700
Subject: [PATCH 1/2] Add prerelease flag for specifying alpha/beta/RC builds

---
 agent/cmd/start.go     |  2 +-
 backend/cmd/start.go   |  2 +-
 build.sh               |  6 +++---
 cli/cmd/start.go       |  2 +-
 version/prerelease.txt |  1 +
 version/version.go     | 19 +++++++++++++++++++
 version/version.txt    |  2 +-
 7 files changed, 27 insertions(+), 7 deletions(-)
 create mode 100644 version/prerelease.txt

diff --git a/agent/cmd/start.go b/agent/cmd/start.go
index edb81adb3f..6d6aff4604 100644
--- a/agent/cmd/start.go
+++ b/agent/cmd/start.go
@@ -58,7 +58,7 @@ func newVersionCommand() *cobra.Command {
 		Short: "Show the sensu-agent version information",
 		Run: func(cmd *cobra.Command, args []string) {
 			fmt.Printf("sensu-agent version %s, build %s, built %s\n",
-				version.Version,
+				version.Semver(),
 				version.BuildSHA,
 				version.BuildDate,
 			)
diff --git a/backend/cmd/start.go b/backend/cmd/start.go
index 9b2dc5e5a0..398870a1a4 100644
--- a/backend/cmd/start.go
+++ b/backend/cmd/start.go
@@ -55,7 +55,7 @@ func newVersionCommand() *cobra.Command {
 		Short: "Show the sensu-backend version information",
 		Run: func(cmd *cobra.Command, args []string) {
 			fmt.Printf("sensu-backend version %s, build %s, built %s\n",
-				version.Version,
+				version.Semver(),
 				version.BuildSHA,
 				version.BuildDate,
 			)
diff --git a/build.sh b/build.sh
index 1d8d0eb8b1..a3ad5359a5 100755
--- a/build.sh
+++ b/build.sh
@@ -78,13 +78,13 @@ build_binary () {
 	local outfile="target/${goos}-${goarch}/${cmd_name}"
 
 	local version=$(cat version/version.txt)
-	local iteration=$(cat version/iteration.txt)
+	local prerelease=$(cat version/prerelease.txt)
 	local build_date=$(date +"%Y-%m-%dT%H:%M:%S%z")
 	local build_sha=$(git rev-parse HEAD)
 
 	local version_pkg="github.com/sensu/sensu-go/version"
-	local ldflags="-X $version_pkg.Version=${version}"
-	local ldflags+=" -X $version_pkg.Iteration=${iteration}"
+	local ldflags=" -X $version_pkg.Version=${version}"
+	local ldflags+=" -X $version_pkg.PreReleaseIdentifier=${prerelease}"
 	local ldflags+=" -X $version_pkg.BuildDate=${build_date}"
 	local ldflags+=" -X $version_pkg.BuildSHA=${build_sha}"
 
diff --git a/cli/cmd/start.go b/cli/cmd/start.go
index 1afe61dd97..65a3592e07 100644
--- a/cli/cmd/start.go
+++ b/cli/cmd/start.go
@@ -63,7 +63,7 @@ func newVersionCommand() *cobra.Command {
 		Short: "Show the sensu-ctl version information",
 		Run: func(cmd *cobra.Command, args []string) {
 			fmt.Printf("sensu-ctl version %s, build %s, built %s\n",
-				version.Version,
+				version.Semver(),
 				version.BuildSHA,
 				version.BuildDate,
 			)
diff --git a/version/prerelease.txt b/version/prerelease.txt
new file mode 100644
index 0000000000..26d9eb97b6
--- /dev/null
+++ b/version/prerelease.txt
@@ -0,0 +1 @@
+alpha.1
diff --git a/version/version.go b/version/version.go
index a0bb355deb..3b3959bb5a 100644
--- a/version/version.go
+++ b/version/version.go
@@ -4,9 +4,28 @@ var (
 	// Version stores the version of the current build (e.g. 2.0.0)
 	Version string
 
+	// PreReleaseIdentifier stores the pre-release identifier of the current build (eg. beta-2)
+	PreReleaseIdentifier string
+
 	// BuildDate stores the timestamp of the build (e.g. 2017-07-31T13:11:15-0700)
 	BuildDate string
 
 	// BuildSHA stores the git sha of the build (e.g. 8673bed0a9705083987b9ecbbc1cc0758df13dd2)
 	BuildSHA string
 )
+
+// Semver returns full semantic versioning compatible identifier.
+// Format: VERSION-PRERELEASE+METADATA
+func Semver() string {
+	version := Version
+	if PreReleaseIdentifier != "" {
+		version = version + "-" + PreReleaseIdentifier
+	}
+
+	gitSHA := BuildSHA
+	if len(gitSHA) > 7 {
+		gitSHA = gitSHA[:7]
+	}
+
+	return version + "#" + gitSHA
+}
diff --git a/version/version.txt b/version/version.txt
index dad1dc7ed9..227cea2156 100644
--- a/version/version.txt
+++ b/version/version.txt
@@ -1 +1 @@
-2.0.0p1
+2.0.0

From cb9ca239c362d8787956ac21cbfb57383bcbf7bd Mon Sep 17 00:00:00 2001
From: James Phillips <jamesdphillips@gmail.com>
Date: Fri, 1 Sep 2017 14:43:28 -0700
Subject: [PATCH 2/2] reference prerelease identifier in Makefile

---
 Makefile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 2c2193639b..9e1cd5d269 100644
--- a/Makefile
+++ b/Makefile
@@ -23,6 +23,7 @@ $(shell mkdir -p out)
 # FPM
 ##
 VERSION=$(shell cat version/version.txt)
+PRERELEASE=$(shell cat version/prerelease.txt)
 ITERATION=$(shell cat version/iteration.txt)
 ARCHITECTURE=$(GOARCH)
 DESCRIPTION="A monitoring framework that aims to be simple, malleable, and scalable."
@@ -34,7 +35,7 @@ URL="https://sensuapp.org"
 BIN_SOURCE_DIR=target/$(GOOS)-$(GOARCH)
 
 FPM_FLAGS = \
-	--version $(VERSION) \
+	--version $(VERSION)-$(PRERELEASE) \
 	--iteration $(ITERATION) \
 	--url $(URL) \
 	--license $(LICENSE) \