feat: implement command-line script

bin/cli.js

@@ -0,0 +1,3 @@
+#!/usr/bin/env node
+
+require('../src/cli')()

bin/cli.test.js

@@ -0,0 +1,21 @@
+import test from 'ava'
+import { promisify } from 'util'
+import childProcess from 'child_process'
+import path from 'path'
+
+const execFile = promisify(childProcess.execFile)
+const tested = path.join(__dirname, 'cli.js')
+
+test('output help without command', async (t) => {
+  const { code, stdout, stderr } = await t.throws(execFile(tested))
+  t.true(code === 1)
+  t.true(stdout === '')
+  t.true(stderr.startsWith('ybiquitous <command>'))
+  t.true(stderr.includes('init  Initialize Node.js project'))
+})
+
+test('output help with `--help` option', async (t) => {
+  const { stdout, stderr } = await execFile(tested, ['--help'])
+  t.true(stdout.startsWith('ybiquitous <command>'))
+  t.true(stderr === '')
+})