feat(cli): add component command

.eslintignore

@@ -38,3 +38,6 @@ packages/components/node_modules
 
 # React
 **/storybook-static/**
+
+# Templates
+packages/cli/src/component/templates/**

.prettierignore

@@ -51,3 +51,6 @@ packages/components/docs/js
 
 # Generated files
 **/generated/**
+
+# Templates
+**/*.template.*

packages/cli/package.json

@@ -30,9 +30,11 @@
     "chalk": "^2.4.2",
     "child-process-promise": "^2.2.1",
     "clipboardy": "^2.1.0",
+    "enquirer": "^2.3.6",
     "fast-glob": "^3.2.2",
     "fs-extra": "^8.0.1",
     "inquirer": "^6.4.1",
+    "lodash.template": "^4.5.0",
     "prettier": "^2.1.0",
     "prettier-config-carbon": "^0.5.0",
     "progress-estimator": "^0.2.2",

packages/cli/src/cli.js

@@ -25,7 +25,9 @@ async function main({ argv }) {
           console.error(error.stderr);
           process.exit(1);
         }
-        throw error;
+        console.error(error);
+        process.exit(1);
+        return;
       }
       console.log(message);
       console.log(yargs.help());

packages/cli/src/commands/component.js

@@ -0,0 +1,130 @@
+/**
+ * Copyright IBM Corp. 2019, 2019
+ *
+ * This source code is licensed under the Apache-2.0 license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+'use strict';
+
+const { paramCase } = require('change-case');
+const fs = require('fs-extra');
+const { prompt } = require('enquirer');
+const path = require('path');
+const { loadTemplates } = require('../component');
+const { createLogger } = require('../logger');
+
+const logger = createLogger('component');
+
+function clearConsole() {
+  process.stdout.write(
+    process.platform === 'win32' ? '\x1B[2J\x1B[0f' : '\x1B[2J\x1B[3J\x1B[H'
+  );
+}
+
+async function component() {
+  const templates = await loadTemplates();
+  const questions = [
+    {
+      type: 'input',
+      name: 'name',
+      message: 'What is the name of this component?',
+      validate(value) {
+        if (value === '') {
+          return 'A name is required for the component';
+        }
+        return true;
+      },
+    },
+    {
+      type: 'input',
+      name: 'directory',
+      message: 'Specify the path for this component',
+      initial: '.',
+    },
+    {
+      type: 'multiselect',
+      name: 'options',
+      message: 'What else should we scaffold out for you?',
+      initial: ['tests', 'stories'],
+      choices: [
+        {
+          name: 'tests',
+          value: true,
+        },
+        {
+          name: 'stories',
+          value: true,
+        },
+      ],
+      result(names) {
+        return this.map(names);
+      },
+    },
+  ];
+
+  clearConsole();
+  const answers = await prompt(questions);
+
+  logger.start('Generating component...');
+
+  const directory = path.resolve(
+    process.cwd(),
+    answers.directory,
+    answers.name
+  );
+
+  logger.info(`Writing component directory to ${directory}`);
+
+  if (await fs.exists(directory)) {
+    throw new Error(`A directory already exists at ${directory}`);
+  }
+
+  logger.info('Scaffolding out default files...');
+
+  await fs.ensureDir(directory);
+  await fs.writeFile(
+    path.join(directory, 'index.js'),
+    templates.index.compile({ name: answers.name })
+  );
+  await fs.writeFile(
+    path.join(directory, `${answers.name}.js`),
+    templates.component.compile({ name: answers.name })
+  );
+
+  if (answers.options.tests) {
+    logger.start('Scaffolding out test files...');
+    await fs.ensureDir(path.join(directory, '__tests__'));
+    await fs.writeFile(
+      path.join(directory, '__tests__', `${answers.name}-test.js`),
+      templates.test.compile({ name: answers.name })
+    );
+    logger.stop();
+  }
+
+  if (answers.options.stories) {
+    logger.start('Scaffolding out story files...');
+    await fs.writeFile(
+      path.join(directory, `${answers.name}-story.js`),
+      templates.story.compile({
+        name: answers.name,
+      })
+    );
+    await fs.writeFile(
+      path.join(directory, `${answers.name}.mdx`),
+      templates.mdx.compile({
+        name: answers.name,
+        url: paramCase(answers.name),
+      })
+    );
+    logger.stop();
+  }
+
+  logger.stop();
+}
+
+module.exports = {
+  command: 'component',
+  desc: '[EXPERIMENTAL] Scaffold a component in React',
+  handler: component,
+};

packages/cli/src/component/index.js

@@ -0,0 +1,47 @@
+/**
+ * Copyright IBM Corp. 2019, 2019
+ *
+ * This source code is licensed under the Apache-2.0 license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+'use strict';
+
+const fs = require('fs-extra');
+const path = require('path');
+const template = require('lodash.template');
+
+const TEMPLATES_DIR = path.join(__dirname, 'templates');
+const blocklist = new Set(['.DS_Store']);
+
+async function loadTemplates() {
+  const files = await fs.readdir(TEMPLATES_DIR).then((names) => {
+    return names
+      .filter((name) => {
+        return !blocklist.has(name);
+      })
+      .map((name) => {
+        const extension = path.extname(name);
+        return {
+          name: path.basename(name, `.template${extension}`),
+          filepath: path.join(TEMPLATES_DIR, name),
+        };
+      });
+  });
+
+  const templates = {};
+
+  for (const { name, filepath } of files) {
+    const contents = await fs.readFile(filepath, 'utf8');
+    const compile = template(contents);
+    templates[name] = {
+      compile,
+    };
+  }
+
+  return templates;
+}
+
+module.exports = {
+  loadTemplates,
+};

packages/cli/src/component/templates/component.template.js

@@ -0,0 +1,19 @@
+/**
+ * Copyright IBM Corp. 2016, 2020
+ *
+ * This source code is licensed under the Apache-2.0 license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+import PropTypes from 'prop-types';
+import React from 'react';
+
+function <%= name %>({ children, ...rest }) {
+  return <div {...rest}>{children}</div>;
+}
+
+<%= name %>.propTypes = {
+  children: PropTypes.node,
+};
+
+export default <%= name %>;

packages/cli/src/component/templates/index.template.js

@@ -0,0 +1,9 @@
+/**
+ * Copyright IBM Corp. 2016, 2020
+ *
+ * This source code is licensed under the Apache-2.0 license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+ import <%= name %> from './<%= name %>';
+ export { <%= name %> };

packages/cli/src/component/templates/mdx.template.mdx

@@ -0,0 +1,37 @@
+import { Props } from '@storybook/addon-docs/blocks';
+import { <%= name %> } from './';
+
+# <%= name %>
+
+[Source
+code](https://github.com/carbon-design-system/carbon/tree/master/packages/react/src/components/<%=
+name %>) &nbsp;|&nbsp; [Usage
+guidelines](https://www.carbondesignsystem.com/components/<%= name %>/usage)
+&nbsp;|&nbsp; [Accessibility](https://www.carbondesignsystem.com/components/<%=
+url %>/accessibility)
+
+<!-- START doctoc generated TOC please keep comment here to allow auto update -->
+<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
+
+## Table of Contents
+
+- [Overview](#overview)
+- [Component API](#component-api)
+- [Feedback](#feedback)
+
+<!-- END doctoc generated TOC please keep comment here to allow auto update -->
+
+## Overview
+
+TODO
+
+## Component API
+
+<Props />
+
+## Feedback
+
+Help us improve this component by providing feedback, asking questions on Slack,
+or updating this file on
+[GitHub](https://github.com/carbon-design-system/carbon/edit/master/packages/react/src/components/<%=
+name %>/<%= name %>.mdx).

packages/cli/src/component/templates/story.template.js

@@ -0,0 +1,22 @@
+/**
+ * Copyright IBM Corp. 2016, 2018
+ *
+ * This source code is licensed under the Apache-2.0 license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+import React from 'react';
+import { <%= name %> } from './';
+import mdx from './<%= name %>.mdx';
+
+export default {
+  title: '<%= name %>',
+  component: <%= name %>,
+  parameters: {
+    docs: {
+      page: mdx,
+    },
+  },
+};
+
+export const example = () => <<%= name %>>Story Example</<%= name %>>;

packages/cli/src/component/templates/test.template.js

@@ -0,0 +1,35 @@
+/**
+ * Copyright IBM Corp. 2016, 2020
+ *
+ * This source code is licensed under the Apache-2.0 license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+import { cleanup, render, screen } from '@testing-library/react';
+import React from 'react';
+import { <%= name %> } from '../';
+
+describe('<%= name %>', () => {
+  afterEach(cleanup);
+
+  it('should work', () => {
+    render(<<%= name %>>test</<%= name %>>);
+    // TODO
+  });
+
+  describe('automated accessibility testing', () => {
+    it('should have no axe violations', async () => {
+      render(<<%= name %>>test</<%= name %>>);
+      await expect(screen.getByText('test')).toHaveNoAxeViolations();
+    });
+
+    it('should have no accessibility checker violations', async () => {
+      render(<<%= name %>>test</<%= name %>>);
+      await expect(screen.getByText('test')).toHaveNoACViolations('<%= name %>');
+    });
+  });
+
+  describe('Component API', () => {
+    // TODO
+  });
+});