feat: add build revision and build time

Makefile

@@ -6,7 +6,8 @@ DIR_SRC=./cmd/answer
 DOCKER_CMD=docker
 
 GO_ENV=CGO_ENABLED=0
-GO_FLAGS=-ldflags="-X main.Version=$(VERSION) -X 'main.Time=`date`' -extldflags -static"
+Revision=$(shell git rev-parse --short HEAD)
+GO_FLAGS=-ldflags="-X main.Version=$(VERSION) -X main.Revision=$(Revision) -X 'main.Time=`date`' -extldflags -static"
 GO=$(GO_ENV) $(shell which go)
 
 build:

cmd/answer/command.go

@@ -18,7 +18,7 @@ var (
 )
 
 func init() {
-	rootCmd.Version = Version
+	rootCmd.Version = fmt.Sprintf("%s\nrevision: %s\nbuild time: %s", Version, Revision, Time)
 
 	initCmd.Flags().StringVarP(&dataDirPath, "data-path", "C", "/data/", "data path, eg: -C ./data/")
 

cmd/answer/main.go

@@ -20,6 +20,10 @@ var (
 	Name = "answer"
 	// Version is the version of the project
 	Version = "development"
+	// Revision is the git short commit revision number
+	Revision = ""
+	// Time is the build time of the project
+	Time = ""
 	// log level
 	logLevel = os.Getenv("LOG_LEVEL")
 	// log path