argparse/README.md

argparse
========

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CLI arguments parser for node.js, with [sub-commands](https://docs.python.org/3.9/library/argparse.html#sub-commands) support. Port of python's [argparse](http://docs.python.org/dev/library/argparse.html) (version [3.9.0](https://github.com/python/cpython/blob/v3.9.0rc1/Lib/argparse.py)).

**Difference with original.**

- JS has no keyword arguments support.
  -  Pass options instead: `new ArgumentParser({ description: 'example', add_help: true })`.
- JS has no python's types `int`, `float`, ...
  - Use string-typed names: `.add_argument('-b', { type: 'int', help: 'help' })`.
- `%r` format specifier uses `require('util').inspect()`.

More details in [doc](./doc).


Example
-------

`test.js` file:

```javascript
#!/usr/bin/env node
'use strict';

const { ArgumentParser } = require('argparse');
const { version } = require('./package.json');

const parser = new ArgumentParser({
  description: 'Argparse example'
});

parser.add_argument('-v', '--version', { action: 'version', version });
parser.add_argument('-f', '--foo', { help: 'foo bar' });
parser.add_argument('-b', '--bar', { help: 'bar foo' });
parser.add_argument('--baz', { help: 'baz bar' });

console.dir(parser.parse_args());
```

Display help:

```
$ ./test.js -h
usage: test.js [-h] [-v] [-f FOO] [-b BAR] [--baz BAZ]

Argparse example

optional arguments:
  -h, --help         show this help message and exit
  -v, --version      show program's version number and exit
  -f FOO, --foo FOO  foo bar
  -b BAR, --bar BAR  bar foo
  --baz BAZ          baz bar
```

Parse arguments:

```
$ ./test.js -f=3 --bar=4 --baz 5
{ foo: '3', bar: '4', baz: '5' }
```


API docs
--------

Since this is a port with minimal divergence, there's no separate documentation.
Use original one instead, with notes about difference.

1. [Original doc](https://docs.python.org/3.9/library/argparse.html).
2. [Original tutorial](https://docs.python.org/3.9/howto/argparse.html).
3. [Difference with python](./doc).


argparse for enterprise
-----------------------

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