Allow a recursive option on rmdir

[amxmln]

The rmdir function in newer versions of Node allows for a recursive option that when set to true makes the command behave more like a rm -rf, which I think can be very useful in many situations (such as deleting a cloned but no longer needed git repo for example).

The documentation of lightning-fs suggests that its rmdir also takes an options object, but I browsing through the source I couldn’t find anything that seemed to be using that object (I might have missed something though 😅). I feel like adding a native recursive option could really benefit the library and perhaps would even allow for a more efficient way than a recursive "rimraf" implemented on top of the library, since if I understood the structure of lightning-fs correctly it should be possible to just gather a list of all inodes contained in the directory, delete them and then delete the directory itself in a single transaction, right?

Sorry if that suggested solution is useless, but I hope the rest of my point still stands.

Keep up the great work! 🎉

[SaadBazaz]

Needed!

[jcubic]

@SaadBazaz do you want to contribute?

[SaadBazaz]

@jcubic I can try giving it a go. Any pointers to where I can start?

[jcubic]

You should just get familiar with the code, it was a while when I read the code I don't remember where you should start. But there are not much code in this project.

[kaytwo]

FWIW I ran into this issue and just used unlink on a directory and it worked as I expected it to (equivalent to rm -rf). Looking at the implementation, this will probably leave "garbage" in the virtual filesystem, but if you're doing something in an ephemeral filesystem it should probably meet your needs.

[amxmln]

Yes, it will not actually delete the files, they will just become inaccessible, because their parent is removed. They will still take up disk space, however, like you said.

[7flash]

mkdir also missing recursive option

[tom-sze]

export async function clearDirectory(dir) {
    for (let item of await window.pfs.readdir(dir)) {
        const item_path = `${dir}/` + item;
        if ((await window.pfs.stat(item_path)).type === 'file') {
            await window.pfs.unlink(item_path);
        } else {
            await clearDirectory(item_path);
            await window.pfs.rmdir(item_path);
        }
    }
}

then just "await rmdir(dir)" after "await clearDirectory(dir)"