feat: added flag to have it prompt for generator and action

README.md

@@ -79,6 +79,12 @@ Loaded templates: _templates
        added: app/hello.js
 ```
 
+Or you can have it prompt for generator and action:
+
+```
+$ hygen --prompt
+```
+
 You've generated content into the current working directory in `app/`. To see how the generator is built, look at `_templates` (which you should check-in to your project from now on, by the way).
 
 You can build a generator that uses an interactive prompt to fill in a variable:

src/params.js

@@ -6,14 +6,39 @@ const L = require('lodash')
 const path = require('path')
 const yargs = require('yargs-parser')
 const prompt = require('./prompt')
+const { availableActions } = require('./help')
 
 const params = async (
-  { templates, createPrompter }: RunnerConfig,
+  { templates, logger, createPrompter }: RunnerConfig,
   externalArgv: Array<string>
 ): any => {
   const argv = yargs(externalArgv)
+  let [generator, action] = argv._
+  const name = argv._[2]
+
+  if (argv.prompt) {
+    logger.log('Asking for generator and action')
+
+    const availableOptions = availableActions(templates)
+
+    const prompter = createPrompter()
+    let response = await prompter.prompt({
+      type: 'select',
+      name: 'generator',
+      message: 'Generator?',
+      choices: Object.keys(availableOptions)
+    })
+    generator = response.generator // eslint-disable-line prefer-destructuring
+
+    response = await prompter.prompt({
+      type: 'select',
+      name: 'action',
+      message: 'Action?',
+      choices: availableOptions[generator]
+    })
+    action = response.action // eslint-disable-line prefer-destructuring
+  }
 
-  const [generator, action, name] = argv._
   if (!generator || !action) {
     return { generator, action, templates }
   }