# hash-for-dep [![Build Status](https://travis-ci.org/stefanpenner/hash-for-dep.svg?branch=stuff)](https://travis-ci.org/stefanpenner/hash-for-dep) [![Build status](https://ci.appveyor.com/api/projects/status/wf2u3j6lc52hdd21?svg=true)](https://ci.appveyor.com/project/embercli/hash-for-dep)

Generate a hash representing the stats of this module files and all its descendents files.


```js
var hashForDep = require('hash-for-dep');

hashForDep('rsvp'); // if RSVP is a dependency of the current project, you will get a checksum for it
hashForDep('rsvp', 'path/to/other/project'); //  you will get a checksum for RSVP resolved relative to the provided root
```

## Cache

NOTE: By default, these hashes are cached for the life of the process. As this
is the same strategy node uses for `require(x)` we can safely follow suite.

That being said, some scenarios may exist where this is not wanted. So just
like `require._cache` exists, we provide the following options:

#### To evict the cache manually (maybe for testing)

```js
require('hash-for-dep')._resetCache();
```

#### To opt out of the cache on a per invocation basis

```js
var hashForDep = require('hash-for-dep');

hashForDep(name, path, null, false /* this mysterious argument should be set to false */);
```