with-local-tmp-dir VS fs-extra

Why not use real files for testing instead of mocking? I built an NPM package called with-local-tmp-dir that basically creates a temporary subfolder inside cwd, cds into it, runs a function, and cds back to the previous cwd afterwards. In this function you can create files and pretty much anything, run your unit under test. Afterwards the folder is removed and everything is cleaned up. You actually do not solely need to use it for tests, you can use it anywhere, but it's mostly useful for tests.

I haven't seen fs-extra mentioned yet. For my work it involves a fair bit of reading/writing to the filesystem, so this makes it quite nice to deal with everything in an async way.

There are a number of these modules, https://github.com/jprichardson/node-fs-extra being probably the most famous / popular. It does a better job of explaining the why.

Since updating nodejs@18 and switching to esm only, many libraries have been replaced to support esm import, but fs-extra has not been The use of esm is correctly supported, and no suitable replacement has been found. After the a PR proposed by us was rejected, I decided to re-release a [fs-extra-unified] that correctly supports the use of esm (https://www.npmjs.com/package/fs-extra-unified) module.

Are you seriously suggesting the creators of the software can't write a "save elsewhere" function using Electron and JavaScript? The system has versioning so it would be easy to ask the user to create a backup on first loading with a new version of the software, and the copySync function to make a backup. Foundry uses Node.js already.

We are dealing with a file that is far too large to be loaded into memory at once. Node cannot buffer the file for us because of the size of it.

Implementing those 3 features was quite simple. For metadata and markdown file, I mainly used an external library: showdown to convert from markdown files to html files as well as parsing metadata from markdown files. However, implementing the support for static assets such as images is a bit more interesting. I had to use another external library called fs-extra to copy assets folder from user to the dist folder. I also had to create another new class called CopyFolder where I used fs.copy method to copy assets folder

The zx project implements a shell script executor similar to Bash but using JavaScript modules. It provides an inbuilt asynchronous JavaScript API to call other commands similar to Bash. Besides that, it provides wrapper functions for several Node.js-based command-line helpers such as chalk, minimist, fs-extra, OS, and Readline.

Node.js has the built-in fs module (fs/promises with async/await) which makes it easy to interact with the file system. On top of that, there are a few convenient libraries such as fs-extra and findit that make common tasks straightforward.

For this purpose we'll use fs-extra since copy/paste seems like not supported by fs API.