Yargs be a node.js library fer hearties tryin' ter parse optstrings
* bash-completion shortcuts for commands and options.
* and [tons more](/docs/api.md).
## Installation
Stable version:
```bash
npm i yargs
```
Bleeding edge version with the most recent features:
```bash
npm i yargs@next
```
## Usage :
### Simple Example
````javascript
#!/usr/bin/env node
const argv = require('yargs').argv
if (argv.ships > 3 && argv.distance < 53.5) {
console.log('Plunder more riffiwobbles!')
} else {
console.log('Retreat from the xupptumblers!')
}
````
```bash
$ ./plunder.js --ships=4 --distance=22
Plunder more riffiwobbles!
$ ./plunder.js --ships 12 --distance 98.7
Retreat from the xupptumblers!
```
### Complex Example
```javascript
#!/usr/bin/env node
require('yargs') // eslint-disable-line
.command('serve [port]', 'start the server', (yargs) => {
yargs
.positional('port', {
describe: 'port to bind on',
default: 5000
})
}, (argv) => {
if (argv.verbose) console.info(`start server on :${argv.port}`)
serve(argv.port)
})
.option('verbose', {
alias: 'v',
default: false
})
.argv
```
Run the example above with `--help` to see the help for the application.
## Community :
Having problems? want to contribute? join our [community slack](http://devtoolscommunity.herokuapp.com).
## Documentation :
### Table of Contents
* [Yargs' API](/docs/api.md)
* [Examples](/docs/examples.md)
* [Parsing Tricks](/docs/tricks.md)
* [Stop the Parser](/docs/tricks.md#stop)
* [Negating Boolean Arguments](/docs/tricks.md#negate)
* [Numbers](/docs/tricks.md#numbers)
* [Arrays](/docs/tricks.md#arrays)
* [Objects](/docs/tricks.md#objects)
* [Advanced Topics](/docs/advanced.md)
* [Composing Your App Using Commands](/docs/advanced.md#commands)
* [Building Configurable CLI Apps](/docs/advanced.md#configuration)
* [Customizing Yargs' Parser](/docs/advanced.md#customizing)
* [Contributing](/contributing.md)
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