lazy initialization at start

Signed-off-by: Andrea Luzzardi <aluzzardi@gmail.com>

cmd/create.go

@@ -2,7 +2,6 @@ package cmd
 
 import (
 	"bytes"
-	"context"
 	"fmt"
 	"io/ioutil"
 	"os"
@@ -42,7 +41,6 @@ func init() {
 }
 
 func create(name, rootDir string) {
-	ctx := context.Background()
 	ui.Info("Creating a new blockchain app in %s", ui.Emphasize(rootDir))
 
 	if err := scaffold(name, rootDir); err != nil {
@@ -51,14 +49,6 @@ func create(name, rootDir string) {
 
 	build(name, rootDir, false)
 
-	ui.Info("Generating configuration and gensis")
-	if err := dockerRun(ctx, rootDir, name, "init"); err != nil {
-		ui.Fatal("Initialization failed: %v", err)
-	}
-	if err := ui.Tree(path.Join(rootDir, "data"), nil); err != nil {
-		ui.Fatal("%v", err)
-	}
-
 	ui.Success("Sucess! Created %s at %s", ui.Emphasize(name), ui.Emphasize(rootDir))
 	printGettingStarted(name)
 }

cmd/start.go

@@ -2,6 +2,8 @@ package cmd
 
 import (
 	"context"
+	"os"
+	"path"
 	"path/filepath"
 	"time"
 
@@ -45,6 +47,18 @@ func startExplorer(ctx context.Context, name, rootDir string) {
 func start(name, rootDir string) {
 	ctx, cancel := context.WithCancel(context.Background())
 	ui.Info("Starting %s", name)
+
+	// Initialize if needed.
+	if _, err := os.Stat(path.Join(rootDir, "data")); os.IsNotExist(err) {
+		ui.Info("Generating configuration and gensis")
+		if err := dockerRun(ctx, rootDir, name, "init"); err != nil {
+			ui.Fatal("Initialization failed: %v", err)
+		}
+		if err := ui.Tree(path.Join(rootDir, "data"), nil); err != nil {
+			ui.Fatal("%v", err)
+		}
+	}
+
 	ui.Success("Application is live at:     %s", ui.Emphasize("http://localhost:26657/"))
 	ui.Success("Cosmos Explorer is live at: %s", ui.Emphasize("http://localhost:8080/"))
 	defer cancel()