Firebase Cloud function Temp Storage

Question

I made a cloud function in Firebase that resizes images. Therefore, I download the image and save it in the temp storage.

const tmp = require('tmp-promise');
const { path: tmpDirPath } = await tmp.dir();

https://www.npmjs.com/package/tmp-promise

The firebase documentation says "Always delete temporary files". https://firebase.google.com/docs/functions/tips#write_idempotent_functions

Does this package do this automatically or is there a specific code I should run? Will this interfere if the function gets triggered multiple times (having multiple instances each converting a picture at the same time)?

Thanks in advance!

Answer 1

That library would have no way of knowing when it's time to delete any files it creates. Only you know that, and you'll have to code your function to delete those files just before the function terminates, and the files are no longer in use.