Make `mount` command available on more platforms

[darkdragon-001]

There is fuse-rs and this is one of the few missing features to feature parity with Restic. I sometimes find it very handy to just browse a snapshot with all my available tools.

[simonsan]

FUSE is a *nix solution, we discussed on discord a while ago how to go forward on mount. There are two different possible (non mutually exclusive) solutions. FUSE and WebDAV. The idea was to build a VFS-Layer that you can be used with both, FUSE and WebDAV.

[aawsome]

@darkdragon-001 If you are willing to self-compile rustic in combination with a local `rustic_core', you can try #973 in combination with rustic-rs/rustic_core#106. Note this is WIP, but I'm happy to get feedback on it!

WebDAV should be almost as easy to implement, but the API is async Rust and needs a bit more boilerplate...

[aawsome]

webdav is now also implemented in #973

[robsmith11]

If I want to try this, should I just build rustic-rs with #973?
Looks like the rustic-core patch was already merged.

[aawsome]

@robsmith11 There is another PR in rustic_core needed for mount: rustic-rs/rustic_core#156.

I updated #973 and it now uses the needed rustic_core branch. So, to try out the mount command it is now sufficient to manually build #973.

[fgimian]

Just an FYI that sadly WebDAV is not very usable on Windows, it is extremely slow and there are limits on file sizes that can be copied from a WebDAV share.

I wonder if WinFsp could be explored for Windows users as it likely will provide a better experience.

Cheers
Fotis

[simonsan]

WinFSP is on the radar, though for now, I think the focus is on implementing mount for Linux and FreeBSD so there are options on these operating systems. You might be able to mount via WSL2 then on Windows, before a more native solution is being released.