Add version information

Dockerfile

@@ -5,6 +5,7 @@ WORKDIR /app
 COPY . .
 RUN go mod download
 
-RUN go build -o rove-server .
+RUN go build -o rove-server -ldflags="-X version.Version=$(git describe --always --long --dirty)" .
+
+CMD [ "./rove-server" ]
 
-CMD "./rove-server"

main.go

@@ -8,13 +8,20 @@ import (
 	"syscall"
 
 	"github.com/mdiluz/rove/pkg/server"
+	"github.com/mdiluz/rove/pkg/version"
 )
 
+var ver = flag.Bool("version", false, "Display version number")
 var port = flag.Int("port", 8080, "The port to host on")
 
 func main() {
 	flag.Parse()
 
+	if *ver {
+		fmt.Println(version.Version)
+		os.Exit(0)
+	}
+
 	s := server.NewServer(
 		server.OptionPort(*port),
 		server.OptionPersistentData())

pkg/server/router.go

@@ -6,18 +6,40 @@ import (
 	"net/http"
 
 	"github.com/mdiluz/rove/pkg/accounts"
+	"github.com/mdiluz/rove/pkg/version"
 )
 
+// Route defines the information for a single path->function route
+type Route struct {
+	path    string
+	handler func(http.ResponseWriter, *http.Request)
+}
+
 // NewRouter sets up the server mux
 func (s *Server) SetUpRouter() {
+
+	// Array of all our routes
+	var routes = []Route{
+		{
+			path:    "/status",
+			handler: s.HandleStatus,
+		},
+		{
+			path:    "/register",
+			handler: s.HandleRegister,
+		},
+	}
+
 	// Set up the handlers
-	s.router.HandleFunc("/status", s.HandleStatus)
-	s.router.HandleFunc("/register", s.HandleRegister)
+	for _, route := range routes {
+		s.router.HandleFunc(route.path, route.handler)
+	}
 }
 
 // StatusResponse is a struct that contains information on the status of the server
 type StatusResponse struct {
-	Ready bool `json:"ready"`
+	Ready   bool   `json:"ready"`
+	Version string `json:"version"`
 }
 
 // HandleStatus handles HTTP requests to the /status endpoint
@@ -31,7 +53,8 @@ func (s *Server) HandleStatus(w http.ResponseWriter, r *http.Request) {
 	}
 
 	var response = StatusResponse{
-		Ready: true,
+		Ready:   true,
+		Version: version.Version,
 	}
 
 	// Be a good citizen and set the header for the return

pkg/server/router_test.go

@@ -21,6 +21,10 @@ func TestHandleStatus(t *testing.T) {
 	if status.Ready != true {
 		t.Errorf("got false for /status")
 	}
+
+	if len(status.Version) == 0 {
+		t.Errorf("got empty version info")
+	}
 }
 
 func TestHandleRegister(t *testing.T) {

pkg/version/version.go

@@ -0,0 +1,3 @@
+package version
+
+var Version = "undefined"