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Unique filenames with streams support
Checking if a file exists before opening is an anti-pattern that leaves you vulnerable to race conditions: another process can remove the file between the calls to fs.exists() and fs.open(). This functions doesn't use fs.exists functionality. If file doesn't exist this will work like usual fs module methods
npm install fsu
Same as fs.open but open for writing and creates unique filename.
const fsu = require('fsu');
const { fd, path } = await fsu.openUnique("text{_###}.txt");
Same as fs.writeFile but creates unique filename.
const fsu = require('fsu');
const path = await fsu.writeFileUnique("text{_###}.txt", "test");
Same as fs.createWriteStream but returns writable stream for unique file.
const fsu = require('fsu');
let stream = fsu.createWriteStreamUnique("text{_###}.txt");
Stream has a path
property that contains a new path
Add force = true
to options, and it will recursively create directories if they are not exist.
You must use {#}
pattern in filename and path. All #
characters will be change with counter for existing files. Number of #
means padding for unique counter. With no pattern in the filename works as usual 'fs' module.
If we run second example several times filenames will be
text.txt
text_001.txt
text_002.txt
License: MIT
FAQs
Unique file name with streams support
The npm package fsu receives a total of 1,364,317 weekly downloads. As such, fsu popularity was classified as popular.
We found that fsu demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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