feat(systemd_lsp): Update functionality and add extra documentation.

[kris3713]

Add's important root markers for this LSP config.

Changes how the LSP config recognizes Systemd unit files, and added important documentation regarding autocmds.

[justinmk]

root_markers does not (yet) support wildcards/glob.

[kris3713]

let me correct that

[kris3713]

Will this work?

[kris3713]

I tried it with a service file, and it seems to work just fine.

[kris3713]

@justinmk, Don't merge this PR just yet, one user (@brady444) is reporting that the current Lsp config (including my fork for this PR) isn't working for them.

[kris3713]

@justinmk, All issues have been solved. You can merge this PR without any more trouble.

[kris3713]

Hey @justinmk, why is this PR not being merged?

[magnuslarsen]

Hi @kris3713 - systemd-lsp just had a new release, with support for a bunch of podman/quadlet files. The autocmd note could be updated as so:

vim.api.nvim_create_autocmd({ "BufReadPost", "BufNewFile" }, {
	desc = "Set filetype to systemd for systemd unit files",
	group = vim.api.nvim_create_augroup("systemd-filetypes", { clear = true }),
	pattern = {
		-- systemd unit files
		"*.service",
		"*.socket",
		"*.timer",
		"*.mount",
		"*.automount",
		"*.swap",
		"*.target",
		"*.path",
		"*.slice",
		"*.scope",
		"*.device",
		-- Podman Quadlet files
		"*.container",
		"*.volume",
		"*.network",
		"*.kube",
		"*.pod",
		"*.build",
		"*.image",
	},
	callback = function()
		local bufnr = vim.api.nvim_get_current_buf()
		vim.bo[bufnr].filetype = "systemd"
	end,
})

ref: JFryy/systemd-lsp#22

[kris3713]

@justinmk, I managed to add your suggestions. Sorry for the delay.