mirror of
https://github.com/actions/setup-python.git
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90 lines
4.0 KiB
Markdown
90 lines
4.0 KiB
Markdown
# Pirates [![Version][version-badge]][npm-link] [![Build Status][build-badge]][build-link] [![Coverage][codecov-badge]][codecov-link] [![Commitizen friendly][cz-badge]][cz-link] [![semantic-release][sr-badge]][sr-link] [![MIT License][license-badge]][license-link]
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### Properly hijack require
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[version-badge]: https://img.shields.io/npm/v/pirates.svg "npm version"
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[downloads-badge]: https://img.shields.io/npm/dm/pirates.svg "npm downloads"
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[npm-link]: http://npm.im/pirates "npm"
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[codecov-badge]: https://img.shields.io/codecov/c/github/ariporad/pirates/master.svg?style=flat "codecov"
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[codecov-link]: https://codecov.io/gh/ariporad/pirates "codecov"
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[license-badge]: https://img.shields.io/npm/l/express.svg "MIT License"
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[license-link]: http://ariporad.mit-license.org "MIT License"
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[build-badge]: https://travis-ci.org/ariporad/pirates.svg "Travis CI Build Status"
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[build-link]: https://travis-ci.org/ariporad/pirates "Travis CI Build Status"
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[cz-badge]: https://img.shields.io/badge/commitizen-friendly-brightgreen.svg "Commitizen friendly"
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[cz-link]: http://commitizen.github.io/cz-cli/ "Commitizen friendly"
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[sr-badge]: https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg
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[sr-link]: https://github.com/semantic-release/semantic-release
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## Why?
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Two reasons:
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1. Babel and istanbul were breaking each other.
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2. Everyone seemed to re-invent the wheel on this, and everyone wanted a solution that was DRY, simple, easy to use,
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and made everything Just Work™, while allowing multiple require hooks, in a fashion similar to calling `super`.
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For some context, see [the Babel issue thread][] which started this all, then [the nyc issue thread][], where
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discussion was moved (as we began to discuss just using the code nyc had developed), and finally to [#1][issue-1]
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where discussion was finally moved.
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[the Babel issue thread]: https://github.com/babel/babel/pull/3062 "Babel Issue Thread"
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[the nyc issue thread]: https://github.com/bcoe/nyc/issues/70 "NYC Issue Thread"
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[issue-1]: https://github.com/ariporad/pirates/issues/1 "Issue #1"
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## Installation
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npm install --save pirates
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## Usage
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Using pirates is really easy:
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```javascript
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// my-module/register.js
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const addHook = require('pirates').addHook;
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// Or if you use ES modules
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// import { addHook } from 'pirates';
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function matcher(filename) {
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// Here, you can inspect the filename to determine if it should be hooked or
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// not. Just return a truthy/falsey. Files in node_modules are automatically ignored,
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// unless otherwise specified in options (see below).
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// TODO: Implement your logic here
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return true;
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}
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const revert = addHook(
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(code, filename) => code.replace('@@foo', 'console.log(\'foo\');'),
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{ exts: ['.js'], matcher }
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);
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// And later, if you want to un-hook require, you can just do:
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revert();
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```
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## API
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### pirates.addHook(hook, [opts={ [matcher: true], [exts: ['.js']], [ignoreNodeModules: true] }]);
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Add a require hook. `hook` must be a function that takes `(code, filename)`, and returns the modified code. `opts` is
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an optional options object. Available options are: `matcher`, which is a function that accepts a filename, and
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returns a truthy value if the file should be hooked (defaults to a function that always returns true), falsey if
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otherwise; `exts`, which is an array of extensions to hook, they should begin with `.` (defaults to `['.js']`);
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`ignoreNodeModules`, if true, any file in a `node_modules` folder wont be hooked (the matcher also wont be called),
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if false, then the matcher will be called for any files in `node_modules` (defaults to true).
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## Projects that use Pirates
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See the [wiki page](https://github.com/ariporad/pirates/wiki/Projects-using-Pirates). If you add Pirates to your project,
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(And you should! It works best if everyone uses it. Then we can have a happy world full of happy require hooks!), please
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add yourself to the wiki.
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## License
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[MIT](http://ariporad.mit-license.org)
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