#132 Override questions with prompts.override

[lumio]

Allows to skip questions if answers are provided and are valid.

[terkelg]

Thank you @lumio – sorry I'm a bit slow because of the relocating.
Can you provide an example of when this is useful?

[lumio]

No worries.

So basically what @jkwohlfahrt wanted in #132 was a way to override questions in a programatically way. Similar to inject but on a field-name base.

I needed something similar for a terminal program too where I usually want the user to specify arguments, so they can quickly run a task without getting shown the prompts and quickly get their job done. However, if they missed an argument, the prompt should still be rendered.

It's basically what flatiron/prompt does with prompt.override although I haven't looked into the implementation of it specifically.

I didn't want to change the behaviour of inject as it was meant for testing only and it works in a different way.

override really overrides the input of existing fields and in combination with e.g. yargs you can easily pass given arguments on.

As an example I added a little code snippet:

const prompts = require('prompts');

// Passing all arguments that was given to `node file.js` with `--argument` or what not.
prompts.override(require('yargs').argv);

// Regular questionnaire
const response = await prompts([
  {
    type: 'text',
    name: 'twitter',
    message: `What's your twitter handle?`
  },
  {
    type: 'multiselect',
    name: 'color',
    message: 'Pick colors',
    choices: [
      { title: 'Red', value: '#ff0000' },
      { title: 'Green', value: '#00ff00' },
      { title: 'Blue', value: '#0000ff' }
    ],
  }
]);

// Calling the script as `node file.js --twitter "terkelg"` would
// skip the first question and jump right to the next one.
console.log(response);

[terkelg]

Thank you! Really awesome and good idea to add that to the readme. 👍 💯