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https://github.com/balena-io-modules/scrutinizer

Extract a git repository's metadata relying on open source conventions
https://github.com/balena-io-modules/scrutinizer

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Extract a git repository's metadata relying on open source conventions

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scrutinizer
===========

[![npm](https://img.shields.io/npm/v/scrutinizer.svg?style=flat-square)](https://npmjs.com/package/scrutinizer)
[![npm license](https://img.shields.io/npm/l/scrutinizer.svg?style=flat-square)](https://npmjs.com/package/scrutinizer)
[![npm downloads](https://img.shields.io/npm/dm/scrutinizer.svg?style=flat-square)](https://npmjs.com/package/scrutinizer)
[![travis](https://img.shields.io/travis/resin-io-modules/scrutinizer/master.svg?style=flat-square&label=linux)](https://travis-ci.org/resin-io-modules/scrutinizer)

> Extract a git repository's metadata relying on open source
> conventions

Installation
------------

Install `scrutinizer` by running:

```sh
npm install --save scrutinizer
```

Documentation
-------------

* [scrutinizer](#module_scrutinizer)
* [.local(gitRepository, options)](#module_scrutinizer.local) ⇒ Promise
* [.remote(gitRepository, options)](#module_scrutinizer.remote) ⇒ Promise

### scrutinizer.local(gitRepository, options) ⇒ Promise
**Kind**: static method of [scrutinizer](#module_scrutinizer)
**Summary**: Examine a local git repository directory
**Access**: public
**Fulfil**: Object - examination results

| Param | Type | Description |
| --- | --- | --- |
| gitRepository | String | path to git repository |
| options | Object | options |
| options.reference | String | git reference to check |
| [options.progress] | function | progress callback (state) |
| [options.whitelistPlugins] | Array.<String> | list of plugins to run. Matches all if empty |

**Example**
```js
scrutinizer.local('./foo/bar/baz', {
reference: 'master',
progress: (state) => {
console.log(state.percentage)
}
}).then((results) => {
console.log(results)
})
```

### scrutinizer.remote(gitRepository, options) ⇒ Promise
If `$GITHUB_TOKEN` is set, it will be used to authenticate with
GitHub to increase rate-limiting.

**Kind**: static method of [scrutinizer](#module_scrutinizer)
**Summary**: Examine a remote git repository url
**Access**: public
**Fulfil**: Object - examination results

| Param | Type | Description |
| --- | --- | --- |
| gitRepository | String | git repository url |
| options | Object | options |
| options.reference | String | git reference to check |
| [options.progress] | function | progress callback (state) |
| [options.whitelistPlugins] | Array.<String> | list of plugins to run. Matches all if empty |

**Example**
```js
scrutinizer.remote('[email protected]:foo/bar.git', {
reference: 'master',
progress: (state) => {
console.log(state.percentage)
}
}).then((results) => {
console.log(results)
})
```

Tests
-----

Our test suite contains integration test cases that run this module against
real projects. For that reason, we maintain a set of git submodules in
`test/repositories`, where the actual test cases that assert their results live
in `test/e2e`.

1. Fetch all git submodules

```sh
git submodule update --init --recursive
```

2. Set `$GITHUB_TOKEN`, to increase rate-limiting

3. Run the `test` npm script:

```sh
npm test
```

You may enable debug information by setting `DEBUG=scrutinizer*`.

Contribute
----------

- Issue Tracker: [github.com/resin-io-modules/scrutinizer/issues](https://github.com/resin-io-modules/scrutinizer/issues)
- Source Code: [github.com/resin-io-modules/scrutinizer](https://github.com/resin-io-modules/scrutinizer)

Before submitting a PR, please make sure that you include tests, and that the
linter runs without any warning:

```sh
npm run lint
```

One of the most valuable things you can contribute to this project is implement
or improve plugins, which are small functions whose duty is to extract a
certain facet about the repository, like license information.

1. Create a new file in `lib/plugins`, like `myplugin.js`

2. Export a function that takes a single argument, `backend`, which contains
every function you need to interact with a git repository, like reading a file

Make sure you use the `backend` object instead of falling back to `fs` or an
API call, so the plugin works fine in both local and remote modes.

You can do whatever you need here, including checking out other branches.
`scrutinizer` will make sure the project is properly reset before calling
another plugin.

3. Add the new plugin to `BUILTIN_PLUGINS` in `lib/index.js`

4. Update test cases in `test/e2e`

Support
-------

If you're having any problem, please [raise an issue][newissue] on GitHub.

License
-------

This project is free software, and may be redistributed under the terms
specified in the [license].

[newissue]: https://github.com/resin-io-modules/scrutinizer/issues/new
[license]: https://github.com/resin-io-modules/scrutinizer/blob/master/LICENSE