mirror of
https://github.com/react/react-native-devtools-frontend.git
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Tim van der Lippe
0fb47801b6
This pulls in version 8, which covers numerous breaking changes. Most notably, the `CLIEngine` class has been removed, for which we should now use `ESLint`. R=jacktfranklin@chromium.org Bug: none Change-Id: I3b64600e690f073d4db19fb34539db7200f3b561 Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/3268298 Reviewed-by: Jack Franklin <jacktfranklin@chromium.org> Commit-Queue: Tim van der Lippe <tvanderlippe@chromium.org>
85 lines
2.7 KiB
Markdown
85 lines
2.7 KiB
Markdown
argparse
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========
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[](http://travis-ci.org/nodeca/argparse)
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[](https://www.npmjs.org/package/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)).
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**Difference with original.**
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- JS has no keyword arguments support.
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- Pass options instead: `new ArgumentParser({ description: 'example', add_help: true })`.
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- JS has no python's types `int`, `float`, ...
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- Use string-typed names: `.add_argument('-b', { type: 'int', help: 'help' })`.
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- `%r` format specifier uses `require('util').inspect()`.
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More details in [doc](./doc).
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Example
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-------
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`test.js` file:
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```javascript
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#!/usr/bin/env node
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'use strict';
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const { ArgumentParser } = require('argparse');
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const { version } = require('./package.json');
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const parser = new ArgumentParser({
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description: 'Argparse example'
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});
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parser.add_argument('-v', '--version', { action: 'version', version });
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parser.add_argument('-f', '--foo', { help: 'foo bar' });
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parser.add_argument('-b', '--bar', { help: 'bar foo' });
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parser.add_argument('--baz', { help: 'baz bar' });
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console.dir(parser.parse_args());
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```
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Display help:
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```
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$ ./test.js -h
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usage: test.js [-h] [-v] [-f FOO] [-b BAR] [--baz BAZ]
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Argparse example
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optional arguments:
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-h, --help show this help message and exit
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-v, --version show program's version number and exit
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-f FOO, --foo FOO foo bar
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-b BAR, --bar BAR bar foo
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--baz BAZ baz bar
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```
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Parse arguments:
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```
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$ ./test.js -f=3 --bar=4 --baz 5
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{ foo: '3', bar: '4', baz: '5' }
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```
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API docs
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--------
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Since this is a port with minimal divergence, there's no separate documentation.
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Use original one instead, with notes about difference.
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1. [Original doc](https://docs.python.org/3.9/library/argparse.html).
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2. [Original tutorial](https://docs.python.org/3.9/howto/argparse.html).
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3. [Difference with python](./doc).
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argparse for enterprise
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-----------------------
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Available as part of the Tidelift Subscription
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The maintainers of argparse and thousands of other packages are working with Tidelift to deliver commercial support and maintenance for the open source dependencies you use to build your applications. Save time, reduce risk, and improve code health, while paying the maintainers of the exact dependencies you use. [Learn more.](https://tidelift.com/subscription/pkg/npm-argparse?utm_source=npm-argparse&utm_medium=referral&utm_campaign=enterprise&utm_term=repo)
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