validate registration email address

increased version to 0.7

lib/commands/createuser.js

@@ -1,5 +1,6 @@
 var term = require("ringo/term");
 var shell = require("ringo/shell");
+var strings = require("ringo/utils/strings");
 var registry = require("../utils/registry");
 var {proceed} = require("../utils/shell");
 
@@ -9,7 +10,6 @@ exports.help = function() {
     term.writeln("\n" + exports.description, "\n");
     term.writeln("Usage:");
     term.writeln("  rp createuser\n");
-    return;
 };
 
 exports.createuser = function() {
@@ -31,7 +31,13 @@ exports.createuser = function() {
             term.writeln(term.BOLD, "\nPasswords do not match, please try again.\n", term.RESET);
         }
     }
-    var email = shell.readln("Email: ");
+    while (!email) {
+        email = shell.readln("Email address: ").trim();
+        if (email && !strings.isEmail(email)) {
+            term.writeln(term.BOLD, "Invalid email address", term.RESET);
+            email = null;
+        }
+    }
     term.writeln("\nA registry account will be created using the following information:\n");
     term.writeln("  Username:", term.BOLD, username, term.RESET);
     term.writeln("  Email:", term.BOLD, email, term.RESET);

package.json

@@ -1,6 +1,6 @@
 {
     "name": "rp",
-    "version": "0.6",
+    "version": "0.7",
     "description": "A package manager for RingoJS",
     "keywords": ["package manager", "ringojs", "modules"],
     "homepage": "https://github.com/grob/rp/",