Merge pull request #12 from jaebradley/validate-github-username

fix(prompts): add GitHub username validation

package.json

@@ -61,6 +61,7 @@
   },
   "dependencies": {
     "@babel/runtime": "^7.0.0-beta.42",
+    "@octokit/rest": "^15.2.6",
     "child-process-promise": "^2.2.1",
     "commander": "^2.15.1",
     "deepmerge": "^2.1.0",

src/isGitHubUsernameValid.js

@@ -0,0 +1,14 @@
+import Octokit from '@octokit/rest';
+
+const client = new Octokit();
+
+const isGitHubUsernameValid = async (username) => {
+  try {
+    await client.users.getForUser({ username });
+    return true;
+  } catch (e) {
+    return false;
+  }
+};
+
+export default isGitHubUsernameValid;

src/prompts.js

@@ -3,6 +3,8 @@ import emailValidator from 'email-validator';
 import validateNpmPackageName from 'validate-npm-package-name';
 import isSemver from 'is-semver';
 
+import isGitHubUsernameValid from './isGitHubUsernameValid';
+
 const prompts = async () => (
   inquirer.prompt([
     {
@@ -57,7 +59,13 @@ const prompts = async () => (
       name: 'gitHubUsername',
       message: 'Input your GitHub Username',
       type: 'input',
-      validate: answer => answer && answer.length > 0,
+      validate: async (username) => {
+        if (await isGitHubUsernameValid(username)) {
+          return true;
+        }
+
+        return `${username} is an invalid GitHub username`;
+      },
     },
   ])
 );