fix(null-ls): specify rustfmt manually

[Jint-lzxy]

Haven't introduced rustup into the install script(s) yet cause I can't figure out how to automate this process 😢

[CharlesChiuGit]

https://github.com/CharlesChiuGit/dotfiles/blob/main/install_scripts/langs/rust.sh

maybe this would help

[Jint-lzxy]

Thanks for the script! But the problem is we probably need to avoid installing multiple versions of Rust in parallel - so things become much more complex here, as Rust is distributed in multiple ways:

• Self-hosted distribution (some package managers e.g., brew): the package manager manages version control, rustfmt must be installed via cargo, but this has been deprecated; Besides, Rust is usually NOT installed on a standard path (aka ~/.cargo).
• The "legacy" official installer: Similar to the official installer, except that rustup won't be installed (by default); rustfmt must be installed via cargo, or via rustup but rustup itself must be installed first.
• The official installer, or the rustup[-init] package provided by many package mgrs: The recommended approach.

So if we decide to automate this process, the following should be considered:

• How to cleanup legacy installation(s)? This seems to be far beyond the scope that the install script can handle;
• How to execute rustup-init? (e.g., on MS Windows) Spawning a child process (the GUI version!) will bring many uncertainties to the install script, as its operation is independent of the terminal. Hence to cover these cases the install script can be much more cumbersome - an unworthy trade-off, IMO.

[CharlesChiuGit]

aha, I didn't thought about those details, indeed this is important.
But due to it's complexity, I think it's better not to include it in the installation script.
Just put it in prerequisites should be fine IMO.

[Jint-lzxy]

IMO then we can just put a hint here, just like the sqlite one:

nvimdots/scripts/install.ps1

Lines 399 to 402 in 656e48a

	info -Msg "Spawning Neovim and fetching plugins... (You'll be redirected shortly)"
	info -Msg 'To make sqlite work with lua, manually grab the dlls from "https://www.sqlite.org/download.html" and'
	info_ext -Msg 'replace vim.g.sqlite_clib_path with your path at the bottom of `lua/core/options.lua`'
	info -Msg 'If lazy.nvim failed to fetch any plugin(s), maunally execute `:Lazy sync` until everything is up-to-date.'

[CharlesChiuGit]

that would do too. upvote for this

[Jint-lzxy]

Done :D 98e0678

Windows	*nix

[CharlesChiuGit]

LGTM