add a key prefix for localstorage to allow multiple instances of fs

[pyramation]

Wondering if it's possible to add a prefix to the keys when using any localstorage (or locally persistent) storage.

To give some context, I'm looking to have the ability to have multiple fs instances for use cases of checking out other files systems, each having their own sandboxed root '/' folder.

Currently, I can get it to work using InMemory:

export const getFs = () => {
  return new Promise((resolve, reject) => {
    InMemory.Create((e, _fs) => {
      if (e) return reject(e);
      const fs = new FS();
      fs.initialize(_fs);
      resolve(fs);
    });
  });
};

However, if I use LocalStorage, it ends up "using the same filesystem".

Here's a psuedo-code test to give a gist of what I'm trying to accomplish:

const fs1 = await getFs();
const fs2 = await getFs();
writeSomeStuffHere(fs1, '/lib');
expect(lsTree(fs1, '/')).not.toEqual(lsTree(fs2, '/'));

I was thinking it could already be a potential option, and if not, I was curious if it is an option that could be added, e.g., LocalStorage.create({ prefix: 'mystorage' }, (e, lsfs) => { ... })

[jvilk]

It seems possible, but why would you want to do that? Instead, you can use FolderAdapter to split up a single local storage into multiple file systems scoped to certain folders.

[jvilk]

Closing since I believe FolderAdapter solves this use case. Feel free to reopen if you disagree!