nixos-config/home-manager/neovim/lspconfig.lua

local augroup = vim.api.nvim_create_augroup("LspFormatting", {})

local on_attach = function(client, bufnr)
    local function nnoremap(key, command)
        vim.keymap.set("n", key, command, { noremap = true, silent = true, buffer = bufnr })
    end

    local telescope = require("telescope.builtin")

    nnoremap("gD", vim.lsp.buf.declaration)
    nnoremap("gd", telescope.lsp_definitions)
    nnoremap("gt", telescope.lsp_type_definitions)
    nnoremap("gi", telescope.lsp_implementations)
    nnoremap("gr", telescope.lsp_references)
    nnoremap("K", vim.lsp.buf.hover)
    nnoremap("<C-k>", vim.lsp.buf.signature_help)
    nnoremap("<leader>rn", vim.lsp.buf.rename)
    nnoremap("<leader>ca", vim.lsp.buf.code_action)
    nnoremap("<leader>f", vim.lsp.buf.formatting)
    nnoremap("<leader>d", telescope.diagnostics)
    nnoremap("<C-p>", vim.diagnostic.goto_prev)
    nnoremap("<C-n>", vim.diagnostic.goto_next)

    if client.supports_method("textDocument/formatting") then
        vim.api.nvim_clear_autocmds({ group = augroup, buffer = bufnr })
        vim.api.nvim_create_autocmd("BufWritePre", {
            group = augroup,
            buffer = bufnr,
            callback = function()
                vim.lsp.buf.formatting_sync({}, 3000)
            end,
        })
    end
end

local lsp_status = require("lsp-status")
lsp_status.config({
    current_function = false,
    show_filename = false,
    diagnostics = true,
})
lsp_status.register_progress()

local capabilities = vim.tbl_extend("keep", vim.lsp.protocol.make_client_capabilities(), lsp_status.capabilities)
capabilities = require("cmp_nvim_lsp").update_capabilities(capabilities)

local servers = {
    ["bashls"] = {},
    ["rnix"] = {},
    ["terraformls"] = {},
    ["tflint"] = {},
    ["yamlls"] = {},
}

local lspconfig = require("lspconfig")

for lsp, settings in pairs(servers) do
    lspconfig[lsp].setup({
        settings = settings,
        on_attach = on_attach,
        capabilities = capabilities,
    })
end

require("rust-tools").setup({
    server = {
        on_attach = on_attach,
        settings = {
            ["rust-analyzer"] = {
                cargo = {
                    loadOutDirsFromCheck = true,
                },
                checkOnSave = { command = "clippy" },
                procMacro = {
                    enable = true,
                },
            },
        },
        capabilities = capabilities,
    },
})

local luadev = require("lua-dev").setup({
    lspconfig = {
        on_attach = on_attach,
        capabilities = capabilities,
    },
    runtime_path = true,
})

lspconfig["sumneko_lua"].setup(luadev)