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unique-filename

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unique-filename

Generate a unique filename for use in temporary directories or caches.


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Maintainers
1
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15,772,101
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Package description

What is unique-filename?

The unique-filename npm package is a simple utility that generates a unique filename with an optional file path and extension. It can be used to ensure that files written to a directory do not clash with existing filenames.

What are unique-filename's main functionalities?

Generate a unique filename

This feature generates a unique filename within the specified directory. The result is a random filename that is unlikely to clash with existing files.

const uniqueFilename = require('unique-filename');
const randomFilePath = uniqueFilename('/some/path');
console.log(randomFilePath);

Generate a unique filename with a specific extension

This feature generates a unique filename with a specified file extension, ensuring that the file fits the desired format.

const uniqueFilename = require('unique-filename');
const randomFilePath = uniqueFilename('/some/path', '.txt');
console.log(randomFilePath);

Generate a unique filename with a custom random string generator

This feature allows for a custom random string generator to be used, providing control over the randomness and format of the generated filename.

const uniqueFilename = require('unique-filename');
const customRandom = () => 'custom-string';
const randomFilePath = uniqueFilename('/some/path', '.txt', customRandom);
console.log(randomFilePath);

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Readme

Source

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.

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Last updated on 03 Dec 2015

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