feat(cli): add print version command

Makefile

@@ -22,7 +22,7 @@ ARTEFACT=release/$(APPNAME)-$(GOOS)-$(GOARCH)$(EXT)
 
 # Extract version infos
 VERSION:=`git describe --tags`
-LDFLAGS=-ldflags "-X $(AUTHOR)/$(APPNAME)/main.Version=${VERSION}"
+LDFLAGS=-ldflags "-X main.Version=$(VERSION)"
 
 all: build
 
@@ -44,7 +44,7 @@ clean:
 ## Build executable
 build: $(APPBASE)/$(APPNAME)
 	-mkdir -p release
-	echo "Building: $(ARTEFACT) ..."
+	echo "Building: $(ARTEFACT) $(VERSION) ..."
 	GOOS=$(GOOS) GOARCH=$(GOARCH) go build $(LDFLAGS) -o $(ARTEFACT)
 .PHONY: build
 

config.go

@@ -11,6 +11,7 @@ type Config struct {
 	ListenAddr *string
 	NbWorkers  *int
 	Debug      *bool
+	Version    *bool
 	Timeout    *int
 	ScriptDir  *string
 }
@@ -19,6 +20,7 @@ var config = &Config{
 	ListenAddr: flag.String("listen", getEnv("LISTEN_ADDR", ":8080"), "HTTP service address (e.g.address, ':8080')"),
 	NbWorkers:  flag.Int("nb-workers", getIntEnv("NB_WORKERS", 2), "The number of workers to start"),
 	Debug:      flag.Bool("debug", getBoolEnv("DEBUG", false), "Output debug logs"),
+	Version:    flag.Bool("version", false, "Output version"),
 	Timeout:    flag.Int("timeout", getIntEnv("HOOK_TIMEOUT", 10), "Hook maximum delay before timeout (in second)"),
 	ScriptDir:  flag.String("scripts", getEnv("SCRIPTS_DIR", "scripts"), "Scripts directory"),
 }

main.go

@@ -32,6 +32,11 @@ var (
 func main() {
 	flag.Parse()
 
+	if *config.Version {
+		fmt.Println(Version)
+		return
+	}
+
 	level := "info"
 	if *config.Debug {
 		level = "debug"