Build: Use current tag name as version in linker

Makefile

@@ -1,5 +1,2 @@
-buildcerberus:
-	GO111MODULE=on go build -ldflags="-s -w -X github.com/forsam-education/cerberus/utils.VersionHash=`git rev-parse HEAD` -X github.com/forsam-education/cerberus/utils.BuildTime=`date +%Y-%m-%dT%T%z`" -o bin/cerberus
-
-install: buildcerberus
-	sudo cp bin/cerberus /usr/local/bin
+build: main.go
+	GO111MODULE=on go build -ldflags="-s -w -X github.com/forsam-education/cerberus/utils.VersionHash=`git rev-parse HEAD` -X github.com/forsam-education/cerberus/utils.BuildTime=`date +%Y-%m-%dT%T%z` -X github.com/forsam-education/cerberus/utils.VersionIdentifier=`git describe --tags`" -o bin/cerberus .

cmd/version.go

@@ -15,7 +15,7 @@ var versionCmd = &cobra.Command{
 
   Shows the version for Cerberus.`, utils.ASCIILogo),
 	Run: func(cmd *cobra.Command, args []string) {
-		fmt.Printf("Cerberus version %d.%d.%d - %s (Build time: %s)\n", utils.MajorVersion, utils.MinorVersion, utils.PatchVersion, utils.VersionHash, utils.BuildTime)
+		fmt.Printf("Cerberus version %s - %s (Build time: %s)\n", utils.VersionIdentifier, utils.VersionHash, utils.BuildTime)
 	},
 }
 

utils/version.go

@@ -1,12 +1,8 @@
 package utils
 
 var (
-	// MajorVersion is the hardcoded major version of Cerberus.
-	MajorVersion = 0
-	// MinorVersion is the hardcoded minor version of Cerberus.
-	MinorVersion = 12
-	// PatchVersion is the hardcoded patch version of Cerberus.
-	PatchVersion = 1
+	// VersionIdentifier is the hardcoded version identifier of Cerberus.
+	VersionIdentifier = ""
 	// VersionHash is the commit hash for the built version injected by the linker.
 	VersionHash = ""
 	// BuildTime is the build time in RFC3309 format injected by the linker.