Prevent running on existing project and force running page sub genera…

…tor on existing project (#379)

* Fix check of existing project when using page subgenerator

* When creating new project check if project exists in current directory

* Update error text

generators/app/index.js

@@ -11,6 +11,22 @@ module.exports = class extends Generator {
     super(args, opts);
   }
 
+  initializing() {
+    if (this.config.existed) {
+      this.log('A Chisel project already exists in this folder.');
+      this.log(
+        'If you are trying to setup an existing project, check out the' +
+          ' documentation at https://www.getchisel.co/docs/setup/'
+      );
+      this.log(
+        'If the process of generating project was interrupted and you would' +
+          ' like to continue, we recommend cleaning up the directory and' +
+          ' starting again.'
+      );
+      process.exit(1);
+    }
+  }
+
   prompting() {
     const done = this.async();
 

generators/page/index.js

@@ -37,12 +37,11 @@ module.exports = class extends Generator {
    * @public
    */
   initializing() {
-    try {
-      this.configuration = this.config.get('config');
-    } catch (ex) {
+    if(!this.config.existed) {
       this.log('You need to run this generator in a project directory.');
-      process.exit();
+      process.exit(1);
     }
+    this.configuration = this.config.get('config');
     this.pages = this.config.get('pages');
   }