feat(visibility): set the private flag based on visibility

BREAKING CHANGE: repository will be made private unless visibility is properly provided

closes #2

src/scaffolder.js

@@ -1,13 +1,14 @@
 import chalk from 'chalk';
 import writeYaml from '../third-party-wrappers/write-yaml';
 
-export function scaffold({projectRoot, projectType, description, homepage}) {
+export function scaffold({projectRoot, projectType, description, homepage, visibility}) {
   console.log(chalk.blue('Generating GitHub'));     // eslint-disable-line no-console
 
   return writeYaml(`${projectRoot}/.github/settings.yml`, {
     repository: {
       description,
       homepage,
+      private: 'Public' !== visibility,
       has_wiki: false,
       has_projects: false,
       has_downloads: false,

test/unit/scaffolder-test.js

@@ -28,6 +28,7 @@ suite('github', () => {
         repository: {
           description,
           homepage,
+          private: true,
           has_wiki: false,
           has_projects: false,
           has_downloads: false,
@@ -81,4 +82,40 @@ suite('github', () => {
       })
     ));
   });
+
+  test('that the repository is marked as private when the visibility is `Private`', async () => {
+    yamlWriter.default.resolves();
+
+    await scaffold({projectRoot, projectType: any.word(), visibility: 'Private'});
+
+    assert.calledWith(
+      yamlWriter.default,
+      `${projectRoot}/.github/settings.yml`,
+      sinon.match({repository: {private: true}})
+    );
+  });
+
+  test('that the repository is marked as not private when the visibility is `Public`', async () => {
+    yamlWriter.default.resolves();
+
+    await scaffold({projectRoot, projectType: any.word(), visibility: 'Public'});
+
+    assert.calledWith(
+      yamlWriter.default,
+      `${projectRoot}/.github/settings.yml`,
+      sinon.match({repository: {private: false}})
+    );
+  });
+
+  test('that the repository is marked as private when the visibility is not specified', async () => {
+    yamlWriter.default.resolves();
+
+    await scaffold({projectRoot, projectType: any.word()});
+
+    assert.calledWith(
+      yamlWriter.default,
+      `${projectRoot}/.github/settings.yml`,
+      sinon.match({repository: {private: true}})
+    );
+  });
 });