Fasd: viminfo with neovim

I made something similar with neovim's python interface.

You can check it out
https://github.com/haifengkao/nfasd

this is all I do https://github.com/nhooyr/dotfiles/blob/4605ab8a76dead31f09b2592838485e1a6445794/.config/nvim/init.vim#L70-L80

I can even access it with fzf in neovim!

brilliant!!
nfasd has gone beyond the original goal. It now has folder completion, and better file ordering.
actually I am using it to replace fasd gradually.
besides, it's written in Python (~_^)

EDIT: Nevermind, @nhooyr's solution works perfectly.

I believe this discussion got side-tracked. What I need (and @rosshadden too I believe) is for fasd to index—and include as an option in its results—files that I've opened only from inside NeoVim.

How to reproduce:

1. Open NeoVim.
2. Open a file (e.g. :e file.sh).
3. Exit NeoVim.
4. Try to refer to file.sh using $ neovim f,file.sh<TAB>.
5. Fail miserably as fasd doesn't know I've ever opened file.sh.

I also thought that it would be a good idea to write a back-end for neovim. Having said that, I think the vim-script solution above works well enough for me so I'm just going to stick with that for now. Wouldn't this work well on the readme or somewhere in the wiki or something ?

here's a rough fasd backend for neovim's shada file. I have this in my ~/.fasdrc:

shada() {
    ~/code/neovim/scripts/shadacat.py ~/.local/share/nvim/shada/main.shada 'entry.type.value == 10' | \
        sed -n "s/^.*'f': '\([^']*\)'.*$/\1/p" | \
        awk -v t="$(date +%s)" '{
            if (!seen[$0]) {
                t -= 60
                print $0 "|1|" t
            }
            seen[$0] = 1
        }'
}