fs-temp

fs-temp is a quick and simple way to create temporary files and directories.

Why another one? I know that there are already libraries doing similar things, but I felt that their implementation was unnecessary complicated. I also wanted a quick way to turn a buffer into a file.

Installation

npm install --save fs-temp

Usage

import temp from 'fs-temp'

const data = Buffer.from('testing 1 2 3')
const path = temp.writeFileSync(data)

// `path` now holds the path to a file with the specified `data`

import temp from 'fs-temp'

const path = temp.template('linusu-%s').mkdirSync()

// `path` now holds the path to a directory with the prefix 'linusu-'

Promise support

If you import fs-temp/promises you'll receive an alternative API where all functions that takes callbacks are replaced by Promise-returning functions.

import temp from 'fs-temp/promises'

const data = Buffer.from('testing 1 2 3')
const path = await temp.writeFile(data)

// `path` now holds the path to a file with the specified `data`

API

The api mimics the one provided by fs very closely.

`open(flags[, mode], callback)`

Asynchronous file open.

flags is either 'w' (only writing) or 'w+' (writing and reading).

The callback gets two arguments (err, obj). obj has fd and path.

`openSync(flags[, mode])`

Synchronous version of .open(), returns obj with fd and path.

`mkdir([mode, ]callback)`

Creates an empty directory.

The callback gets two arguments (err, path).

`mkdirSync([mode])`

Synchronous version of .mkdir(), returns path.

`writeFile(data[, encoding], callback)`

Asynchronously writes data to a file. data can be a string or a buffer. The encoding argument is ignored if data is a buffer. It defaults to 'utf8'.

The callback gets two arguments (err, path).

`writeFileSync(data[, encoding])`

Synchronous version of .writeFileSync(), returns path.

`createWriteStream([options])`

Creates and returns a fs.WriteStream that will write it's content to a temporary file. This functions performs a little bit of blocking IO in order to open the file initially.

`template(template)`

Returns a copy of the module that uses the specified template when generating file names. template should be a string where %s will be replaced with some random characters (e.g. 'linusu-%s').

The string should contain %s exactly once. If you want to include a literal percent sign, escape it with another one, e.g. '%%string' becomes '%string'.