unique-filename =============== Generate a unique filename for use in temporary directories or caches. ``` var uniqueFilename = require('unique-filename') // returns something like: /tmp/912ec803b2ce49e4a541068d495ab570 var randomTmpfile = uniqueFilename(os.tmpdir()) // returns something like: /tmp/my-test-912ec803b2ce49e4a541068d495ab570 var randomPrefixedTmpfile = uniqueFilename(os.tmpdir(), 'my-test') var uniqueTmpfile = uniqueFilename('/tmp', 'testing', '/my/thing/to/uniq/on') ``` ### uniqueFilename(*dir*, *fileprefix*, *uniqstr*) → String Returns the full path of a unique filename that looks like: `dir/prefix-7ddd44c0` or `dir/7ddd44c0` *dir* – The path you want the filename in. `os.tmpdir()` is a good choice for this. *fileprefix* – A string to append prior to the unique part of the filename. The parameter is required if *uniqstr* is also passed in but is otherwise optional and can be `undefined`/`null`/`''`. If present and not empty then this string plus a hyphen are prepended to the unique part. *uniqstr* – Optional, if not passed the unique part of the resulting filename will be random. If passed in it will be generated from this string in a reproducable way.