Add command :NixShell

[Julow]

Add a command to call 'nix-shell' and then update the editor's environment as if it was inside the new shell.

It's sometimes useful to fire up a nix-shell just to download a package for using it once. It's annoying however when it's a library or any other dependency of ':make', which can't be called from inside the shell.

Example:

:NixShell -p hello
:term hello

There's no rollback command but it could be written if it's ever needed. Calling the commande several times will nest environments the same way as opening a shell inside a shell.

[Ma27]

Isn't this effectively what https://github.com/figsoda/nix-develop.nvim does?

[Julow]

It's similar with a different API. That other plugin doesn't work with Vim.