Let git compute version number

Makefile

@@ -1,7 +1,7 @@
 OUTPUT_DIR = ./builds
 GIT_COMMIT = `git rev-parse HEAD | cut -c1-7`
-VERSION = 1.1.0
-BUILD_OPTIONS = -ldflags "-X main.Version=$(VERSION) -X main.CommitID=$(GIT_COMMIT)"
+VERSION = $(shell git describe --tags)
+BUILD_OPTIONS = -ldflags "-X main.Version=$(VERSION)"
 
 gotty: main.go server/*.go webtty/*.go backend/*.go Makefile asset
 	go build ${BUILD_OPTIONS}

main.go

@@ -20,7 +20,7 @@ import (
 func main() {
 	app := cli.NewApp()
 	app.Name = "gotty"
-	app.Version = Version + "+" + CommitID
+	app.Version = Version
 	app.Usage = "Share your terminal as a web application"
 	app.HideHelpCommand = true
 	appOptions := &server.Options{}

version.go

@@ -1,4 +1,3 @@
 package main
 
 var Version = "unknown_version"
-var CommitID = "unknown_commit"