Refactor bootstrap so it's decoupled from main function

api.go

@@ -1,12 +1,34 @@
 package main
 
 import (
+	"log"
+	"os"
+
 	"github.com/play-with-docker/play-with-docker/config"
+	"github.com/play-with-docker/play-with-docker/docker"
+	"github.com/play-with-docker/play-with-docker/event"
 	"github.com/play-with-docker/play-with-docker/handlers"
+	"github.com/play-with-docker/play-with-docker/storage"
 )
 
 func main() {
 	config.ParseFlags()
-	handlers.Bootstrap()
+	handlers.Bootstrap(initStorage, initEvent, initFactory)
 	handlers.Register()
 }
+
+func initStorage() storage.StorageApi {
+	s, err := storage.NewFileStorage(config.SessionsFile)
+	if err != nil && !os.IsNotExist(err) {
+		log.Fatal("Error initializing StorageAPI: ", err)
+	}
+	return s
+}
+
+func initEvent() event.EventApi {
+	return event.NewLocalBroker()
+}
+
+func initFactory(s storage.StorageApi) docker.FactoryApi {
+	return docker.NewLocalCachedFactory(s)
+}

handlers/bootstrap.go

@@ -25,15 +25,13 @@ var core pwd.PWDApi
 var e event.EventApi
 var ws *socketio.Server
 
-func Bootstrap() {
-	s, err := storage.NewFileStorage(config.SessionsFile)
-	e = event.NewLocalBroker()
+func Bootstrap(storageInit func() storage.StorageApi, eventInit func() event.EventApi, factoryInit func(storage.StorageApi) docker.FactoryApi) {
+	s := storageInit()
 
-	f := docker.NewLocalCachedFactory(s)
+	e = eventInit()
+
+	f := factoryInit(s)
 
-	if err != nil && !os.IsNotExist(err) {
-		log.Fatal("Error initializing StorageAPI: ", err)
-	}
 	core = pwd.NewPWD(f, e, s)
 
 	sch, err := scheduler.NewScheduler(s, e, core)