491 lines
19 KiB
Markdown
491 lines
19 KiB
Markdown
<img width="75px" height="75px" align="right" alt="Inquirer Logo" src="https://raw.githubusercontent.com/SBoudrias/Inquirer.js/master/assets/inquirer_readme.svg?sanitize=true" title="Inquirer.js"/>
|
|
|
|
# Inquirer.js
|
|
|
|
[](http://badge.fury.io/js/inquirer)
|
|
[](https://codecov.io/gh/SBoudrias/Inquirer.js)
|
|
[](https://app.fossa.com/projects/git%2Bgithub.com%2FSBoudrias%2FInquirer.js?ref=badge_shield)
|
|
|
|
A collection of common interactive command line user interfaces.
|
|
|
|
## Table of Contents
|
|
|
|
1. [Documentation](#documentation)
|
|
1. [Installation](#installation)
|
|
2. [Examples](#examples)
|
|
3. [Methods](#methods)
|
|
4. [Objects](#objects)
|
|
5. [Questions](#questions)
|
|
6. [Answers](#answers)
|
|
7. [Separator](#separator)
|
|
8. [Prompt Types](#prompt)
|
|
2. [User Interfaces and Layouts](#layouts)
|
|
1. [Reactive Interface](#reactive)
|
|
3. [Support](#support)
|
|
4. [Known issues](#issues)
|
|
5. [News](#news)
|
|
6. [Contributing](#contributing)
|
|
7. [License](#license)
|
|
8. [Plugins](#plugins)
|
|
|
|
## Goal and Philosophy
|
|
|
|
**`Inquirer.js`** strives to be an easily embeddable and beautiful command line interface for [Node.js](https://nodejs.org/) (and perhaps the "CLI [Xanadu](https://en.wikipedia.org/wiki/Citizen_Kane)").
|
|
|
|
**`Inquirer.js`** should ease the process of
|
|
|
|
- providing _error feedback_
|
|
- _asking questions_
|
|
- _parsing_ input
|
|
- _validating_ answers
|
|
- managing _hierarchical prompts_
|
|
|
|
> **Note:** **`Inquirer.js`** provides the user interface and the inquiry session flow. If you're searching for a full blown command line program utility, then check out [commander](https://github.com/visionmedia/commander.js), [vorpal](https://github.com/dthree/vorpal) or [args](https://github.com/leo/args).
|
|
|
|
## [Documentation](#documentation)
|
|
|
|
<a name="documentation"></a>
|
|
|
|
### Installation
|
|
|
|
<a name="installation"></a>
|
|
|
|
```shell
|
|
npm install inquirer
|
|
```
|
|
|
|
```javascript
|
|
var inquirer = require('inquirer');
|
|
inquirer
|
|
.prompt([
|
|
/* Pass your questions in here */
|
|
])
|
|
.then((answers) => {
|
|
// Use user feedback for... whatever!!
|
|
})
|
|
.catch((error) => {
|
|
if (error.isTtyError) {
|
|
// Prompt couldn't be rendered in the current environment
|
|
} else {
|
|
// Something else went wrong
|
|
}
|
|
});
|
|
```
|
|
|
|
<a name="examples"></a>
|
|
|
|
### Examples (Run it and see it)
|
|
|
|
Check out the [`packages/inquirer/examples/`](https://github.com/SBoudrias/Inquirer.js/tree/master/packages/inquirer/examples) folder for code and interface examples.
|
|
|
|
```shell
|
|
node packages/inquirer/examples/pizza.js
|
|
node packages/inquirer/examples/checkbox.js
|
|
# etc...
|
|
```
|
|
|
|
### Methods
|
|
|
|
<a name="methods"></a>
|
|
|
|
#### `inquirer.prompt(questions, answers) -> promise`
|
|
|
|
Launch the prompt interface (inquiry session)
|
|
|
|
- **questions** (Array) containing [Question Object](#question) (using the [reactive interface](#reactive-interface), you can also pass a `Rx.Observable` instance)
|
|
- **answers** (object) contains values of already answered questions. Inquirer will avoid asking answers already provided here. Defaults `{}`.
|
|
- returns a **Promise**
|
|
|
|
#### `inquirer.registerPrompt(name, prompt)`
|
|
|
|
Register prompt plugins under `name`.
|
|
|
|
- **name** (string) name of the this new prompt. (used for question `type`)
|
|
- **prompt** (object) the prompt object itself (the plugin)
|
|
|
|
#### `inquirer.createPromptModule() -> prompt function`
|
|
|
|
Create a self contained inquirer module. If you don't want to affect other libraries that also rely on inquirer when you overwrite or add new prompt types.
|
|
|
|
```js
|
|
var prompt = inquirer.createPromptModule();
|
|
|
|
prompt(questions).then(/* ... */);
|
|
```
|
|
|
|
### Objects
|
|
|
|
<a name="objects"></a>
|
|
|
|
#### Question
|
|
|
|
<a name="questions"></a>
|
|
A question object is a `hash` containing question related values:
|
|
|
|
- **type**: (String) Type of the prompt. Defaults: `input` - Possible values: `input`, `number`, `confirm`,
|
|
`list`, `rawlist`, `expand`, `checkbox`, `password`, `editor`
|
|
- **name**: (String) The name to use when storing the answer in the answers hash. If the name contains periods, it will define a path in the answers hash.
|
|
- **message**: (String|Function) The question to print. If defined as a function, the first parameter will be the current inquirer session answers. Defaults to the value of `name` (followed by a colon).
|
|
- **default**: (String|Number|Boolean|Array|Function) Default value(s) to use if nothing is entered, or a function that returns the default value(s). If defined as a function, the first parameter will be the current inquirer session answers.
|
|
- **choices**: (Array|Function) Choices array or a function returning a choices array. If defined as a function, the first parameter will be the current inquirer session answers.
|
|
Array values can be simple `numbers`, `strings`, or `objects` containing a `name` (to display in list), a `value` (to save in the answers hash), and a `short` (to display after selection) properties. The choices array can also contain [a `Separator`](#separator).
|
|
- **validate**: (Function) Receive the user input and answers hash. Should return `true` if the value is valid, and an error message (`String`) otherwise. If `false` is returned, a default error message is provided.
|
|
- **filter**: (Function) Receive the user input and answers hash. Returns the filtered value to be used inside the program. The value returned will be added to the _Answers_ hash.
|
|
- **transformer**: (Function) Receive the user input, answers hash and option flags, and return a transformed value to display to the user. The transformation only impacts what is shown while editing. It does not modify the answers hash.
|
|
- **when**: (Function, Boolean) Receive the current user answers hash and should return `true` or `false` depending on whether or not this question should be asked. The value can also be a simple boolean.
|
|
- **pageSize**: (Number) Change the number of lines that will be rendered when using `list`, `rawList`, `expand` or `checkbox`.
|
|
- **prefix**: (String) Change the default _prefix_ message.
|
|
- **suffix**: (String) Change the default _suffix_ message.
|
|
- **askAnswered**: (Boolean) Force to prompt the question if the answer already exists.
|
|
- **loop**: (Boolean) Enable list looping. Defaults: `true`
|
|
|
|
`default`, `choices`(if defined as functions), `validate`, `filter` and `when` functions can be called asynchronously. Either return a promise or use `this.async()` to get a callback you'll call with the final value.
|
|
|
|
```javascript
|
|
{
|
|
/* Preferred way: with promise */
|
|
filter() {
|
|
return new Promise(/* etc... */);
|
|
},
|
|
|
|
/* Legacy way: with this.async */
|
|
validate: function (input) {
|
|
// Declare function as asynchronous, and save the done callback
|
|
var done = this.async();
|
|
|
|
// Do async stuff
|
|
setTimeout(function() {
|
|
if (typeof input !== 'number') {
|
|
// Pass the return value in the done callback
|
|
done('You need to provide a number');
|
|
return;
|
|
}
|
|
// Pass the return value in the done callback
|
|
done(null, true);
|
|
}, 3000);
|
|
}
|
|
}
|
|
```
|
|
|
|
### Answers
|
|
|
|
<a name="answers"></a>
|
|
A key/value hash containing the client answers in each prompt.
|
|
|
|
- **Key** The `name` property of the _question_ object
|
|
- **Value** (Depends on the prompt)
|
|
- `confirm`: (Boolean)
|
|
- `input` : User input (filtered if `filter` is defined) (String)
|
|
- `number`: User input (filtered if `filter` is defined) (Number)
|
|
- `rawlist`, `list` : Selected choice value (or name if no value specified) (String)
|
|
|
|
### Separator
|
|
|
|
<a name="separator"></a>
|
|
A separator can be added to any `choices` array:
|
|
|
|
```
|
|
// In the question object
|
|
choices: [ "Choice A", new inquirer.Separator(), "choice B" ]
|
|
|
|
// Which'll be displayed this way
|
|
[?] What do you want to do?
|
|
> Order a pizza
|
|
Make a reservation
|
|
--------
|
|
Ask opening hours
|
|
Talk to the receptionist
|
|
```
|
|
|
|
The constructor takes a facultative `String` value that'll be use as the separator. If omitted, the separator will be `--------`.
|
|
|
|
Separator instances have a property `type` equal to `separator`. This should allow tools façading Inquirer interface from detecting separator types in lists.
|
|
|
|
<a name="prompt"></a>
|
|
|
|
### Prompt types
|
|
|
|
---
|
|
|
|
> **Note:**: _allowed options written inside square brackets (`[]`) are optional. Others are required._
|
|
|
|
#### List - `{type: 'list'}`
|
|
|
|
Take `type`, `name`, `message`, `choices`[, `default`, `filter`, `loop`] properties.
|
|
(Note: `default` must be set to the `index` or `value` of one of the entries in `choices`)
|
|
|
|
|
|
|
|
---
|
|
|
|
#### Raw List - `{type: 'rawlist'}`
|
|
|
|
Take `type`, `name`, `message`, `choices`[, `default`, `filter`, `loop`] properties.
|
|
(Note: `default` must be set to the `index` of one of the entries in `choices`)
|
|
|
|
|
|
|
|
---
|
|
|
|
#### Expand - `{type: 'expand'}`
|
|
|
|
Take `type`, `name`, `message`, `choices`[, `default`] properties.
|
|
Note: `default` must be the `index` of the desired default selection of the array. If `default` key not provided, then `help` will be used as default choice
|
|
|
|
Note that the `choices` object will take an extra parameter called `key` for the `expand` prompt. This parameter must be a single (lowercased) character. The `h` option is added by the prompt and shouldn't be defined by the user.
|
|
|
|
See `examples/expand.js` for a running example.
|
|
|
|
|
|
|
|
|
|
---
|
|
|
|
#### Checkbox - `{type: 'checkbox'}`
|
|
|
|
Take `type`, `name`, `message`, `choices`[, `filter`, `validate`, `default`, `loop`] properties. `default` is expected to be an Array of the checked choices value.
|
|
|
|
Choices marked as `{checked: true}` will be checked by default.
|
|
|
|
Choices whose property `disabled` is truthy will be unselectable. If `disabled` is a string, then the string will be outputted next to the disabled choice, otherwise it'll default to `"Disabled"`. The `disabled` property can also be a synchronous function receiving the current answers as argument and returning a boolean or a string.
|
|
|
|
|
|
|
|
---
|
|
|
|
#### Confirm - `{type: 'confirm'}`
|
|
|
|
Take `type`, `name`, `message`, [`default`] properties. `default` is expected to be a boolean if used.
|
|
|
|
|
|
|
|
---
|
|
|
|
#### Input - `{type: 'input'}`
|
|
|
|
Take `type`, `name`, `message`[, `default`, `filter`, `validate`, `transformer`] properties.
|
|
|
|
|
|
|
|
---
|
|
|
|
#### Input - `{type: 'number'}`
|
|
|
|
Take `type`, `name`, `message`[, `default`, `filter`, `validate`, `transformer`] properties.
|
|
|
|
---
|
|
|
|
#### Password - `{type: 'password'}`
|
|
|
|
Take `type`, `name`, `message`, `mask`,[, `default`, `filter`, `validate`] properties.
|
|
|
|
|
|
|
|
---
|
|
|
|
Note that `mask` is required to hide the actual user input.
|
|
|
|
#### Editor - `{type: 'editor'}`
|
|
|
|
Take `type`, `name`, `message`[, `default`, `filter`, `validate`, `postfix`] properties
|
|
|
|
Launches an instance of the users preferred editor on a temporary file. Once the user exits their editor, the contents of the temporary file are read in as the result. The editor to use is determined by reading the $VISUAL or $EDITOR environment variables. If neither of those are present, notepad (on Windows) or vim (Linux or Mac) is used.
|
|
|
|
The `postfix` property is useful if you want to provide an extension.
|
|
|
|
<a name="layouts"></a>
|
|
|
|
### Use in Non-Interactive Environments
|
|
|
|
`prompt()` requires that it is run in an interactive environment. (I.e. [One where `process.stdin.isTTY` is `true`](https://nodejs.org/docs/latest-v12.x/api/process.html#process_a_note_on_process_i_o)). If `prompt()` is invoked outside of such an environment, then `prompt()` will return a rejected promise with an error. For convenience, the error will have a `isTtyError` property to programmatically indicate the cause.
|
|
|
|
## User Interfaces and layouts
|
|
|
|
Along with the prompts, Inquirer offers some basic text UI.
|
|
|
|
#### Bottom Bar - `inquirer.ui.BottomBar`
|
|
|
|
This UI present a fixed text at the bottom of a free text zone. This is useful to keep a message to the bottom of the screen while outputting command outputs on the higher section.
|
|
|
|
```javascript
|
|
var ui = new inquirer.ui.BottomBar();
|
|
|
|
// pipe a Stream to the log zone
|
|
outputStream.pipe(ui.log);
|
|
|
|
// Or simply write output
|
|
ui.log.write('something just happened.');
|
|
ui.log.write('Almost over, standby!');
|
|
|
|
// During processing, update the bottom bar content to display a loader
|
|
// or output a progress bar, etc
|
|
ui.updateBottomBar('new bottom bar content');
|
|
```
|
|
|
|
<a name="reactive"></a>
|
|
|
|
## Reactive interface
|
|
|
|
Internally, Inquirer uses the [JS reactive extension](https://github.com/ReactiveX/rxjs) to handle events and async flows.
|
|
|
|
This mean you can take advantage of this feature to provide more advanced flows. For example, you can dynamically add questions to be asked:
|
|
|
|
```js
|
|
var prompts = new Rx.Subject();
|
|
inquirer.prompt(prompts);
|
|
|
|
// At some point in the future, push new questions
|
|
prompts.next({
|
|
/* question... */
|
|
});
|
|
prompts.next({
|
|
/* question... */
|
|
});
|
|
|
|
// When you're done
|
|
prompts.complete();
|
|
```
|
|
|
|
And using the return value `process` property, you can access more fine grained callbacks:
|
|
|
|
```js
|
|
inquirer.prompt(prompts).ui.process.subscribe(onEachAnswer, onError, onComplete);
|
|
```
|
|
|
|
## Support (OS Terminals)
|
|
|
|
<a name="support"></a>
|
|
|
|
You should expect mostly good support for the CLI below. This does not mean we won't
|
|
look at issues found on other command line - feel free to report any!
|
|
|
|
- **Mac OS**:
|
|
- Terminal.app
|
|
- iTerm
|
|
- **Windows ([Known issues](#issues))**:
|
|
- [ConEmu](https://conemu.github.io/)
|
|
- cmd.exe
|
|
- Powershell
|
|
- Cygwin
|
|
- **Linux (Ubuntu, openSUSE, Arch Linux, etc)**:
|
|
- gnome-terminal (Terminal GNOME)
|
|
- konsole
|
|
|
|
## Known issues
|
|
|
|
<a name="issues"></a>
|
|
|
|
Running Inquirer together with network streams in Windows platform inside some terminals can result in process hang.
|
|
Workaround: run inside another terminal.
|
|
Please refer to the https://github.com/nodejs/node/issues/21771
|
|
|
|
Calling a node script that uses Inquirer from grunt-exec can cause the program to crash. To fix this, add to your grunt-exec config `stdio: 'inherit'`.
|
|
Please refer to https://github.com/jharding/grunt-exec/issues/85
|
|
|
|
## News on the march (Release notes)
|
|
|
|
<a name="news"></a>
|
|
|
|
Please refer to the [GitHub releases section for the changelog](https://github.com/SBoudrias/Inquirer.js/releases)
|
|
|
|
## Contributing
|
|
|
|
<a name="contributing"></a>
|
|
|
|
**Unit test**
|
|
Unit test are written in [Mocha](https://mochajs.org/). Please add a unit test for every new feature or bug fix. `npm test` to run the test suite.
|
|
|
|
**Documentation**
|
|
Add documentation for every API change. Feel free to send typo fixes and better docs!
|
|
|
|
We're looking to offer good support for multiple prompts and environments. If you want to
|
|
help, we'd like to keep a list of testers for each terminal/OS so we can contact you and
|
|
get feedback before release. Let us know if you want to be added to the list (just tweet
|
|
to [@vaxilart](https://twitter.com/Vaxilart)) or just add your name to [the wiki](https://github.com/SBoudrias/Inquirer.js/wiki/Testers)
|
|
|
|
## License
|
|
|
|
<a name="license"></a>
|
|
|
|
Copyright (c) 2016 Simon Boudrias (twitter: [@vaxilart](https://twitter.com/Vaxilart))
|
|
Licensed under the MIT license.
|
|
|
|
## Plugins
|
|
|
|
<a name="plugins"></a>
|
|
|
|
### Prompts
|
|
|
|
[**autocomplete**](https://github.com/mokkabonna/inquirer-autocomplete-prompt)<br>
|
|
Presents a list of options as the user types, compatible with other packages such as fuzzy (for search)<br>
|
|
<br>
|
|
|
|
|
|
[**checkbox-plus**](https://github.com/faressoft/inquirer-checkbox-plus-prompt)<br>
|
|
Checkbox list with autocomplete and other additions<br>
|
|
<br>
|
|
|
|
|
|
[**inquirer-date-prompt**](https://github.com/haversnail/inquirer-date-prompt)<br>
|
|
Customizable date/time selector with localization support<br>
|
|
<br>
|
|
|
|
|
|
[**datetime**](https://github.com/DerekTBrown/inquirer-datepicker-prompt)<br>
|
|
Customizable date/time selector using both number pad and arrow keys<br>
|
|
<br>
|
|
|
|
|
|
[**inquirer-select-line**](https://github.com/adam-golab/inquirer-select-line)<br>
|
|
Prompt for selecting index in array where add new element<br>
|
|
<br>
|
|
|
|
|
|
[**command**](https://github.com/sullof/inquirer-command-prompt)<br>
|
|
Simple prompt with command history and dynamic autocomplete<br>
|
|
|
|
[**inquirer-fuzzy-path**](https://github.com/adelsz/inquirer-fuzzy-path)<br>
|
|
Prompt for fuzzy file/directory selection.<br>
|
|
<br>
|
|
|
|
|
|
[**inquirer-emoji**](https://github.com/tannerntannern/inquirer-emoji)<br>
|
|
Prompt for inputting emojis.<br>
|
|
<br>
|
|
|
|
|
|
[**inquirer-chalk-pipe**](https://github.com/LitoMore/inquirer-chalk-pipe)<br>
|
|
Prompt for input chalk-pipe style strings<br>
|
|
<br>
|
|
|
|
|
|
[**inquirer-search-checkbox**](https://github.com/clinyong/inquirer-search-checkbox)<br>
|
|
Searchable Inquirer checkbox<br>
|
|
|
|
[**inquirer-search-list**](https://github.com/robin-rpr/inquirer-search-list)<br>
|
|
Searchable Inquirer list<br>
|
|
<br>
|
|
|
|
|
|
[**inquirer-prompt-suggest**](https://github.com/olistic/inquirer-prompt-suggest)<br>
|
|
Inquirer prompt for your less creative users.<br>
|
|
<br>
|
|
|
|
|
|
[**inquirer-s3**](https://github.com/HQarroum/inquirer-s3)<br>
|
|
An S3 object selector for Inquirer.<br>
|
|
<br>
|
|
|
|
|
|
[**inquirer-autosubmit-prompt**](https://github.com/yaodingyd/inquirer-autosubmit-prompt)<br>
|
|
Auto submit based on your current input, saving one extra enter<br>
|
|
|
|
[**inquirer-file-tree-selection-prompt**](https://github.com/anc95/inquirer-file-tree-selection)<br>
|
|
Inquirer prompt for to select a file or directory in file tree<br>
|
|
<br>
|
|
|
|
|
|
[**inquirer-table-prompt**](https://github.com/eduardoboucas/inquirer-table-prompt)<br>
|
|
A table-like prompt for Inquirer.<br>
|
|
<br>
|
|
|