snowfield/config/home/nvim/lua/lsp.lua

-- This file sets up autocompletion for neovim's native lsp

-- This enables all the language servers I want on my system
-- Change these to whatever languages you use

require'lspconfig'.rnix.setup{}
require'lspconfig'.sumneko_lua.setup{}
vim.o.completeopt = "menuone,noselect"

-- Autocompletion setup
require'compe'.setup {
    enabled = true;
    autocomplete = true;
    debug = false;
    min_length = 1;
    preselect = 'enable';
    throttle_time = 80;
    source_timeout = 200;
    incomplete_delay = 400;
    max_abbr_width = 100;
    max_kind_width = 100;
    max_menu_width = 100;
    documentation = false;
    source = {
        path = true;
        buffer = true;
        nvim_lsp = true;
        treesitter = true;
    };
}

-- Set tab to accept the autocompletion
local t = function(str)
    return vim.api.nvim_replace_termcodes(str, true, true, true)
end
_G.tab_complete = function()
    if vim.fn.pumvisible() == 1 then
        return t "<C-n>"
    else
        return t "<S-Tab>"
    end
end

vim.api.nvim_set_keymap("i", "<Tab>", "v:lua.tab_complete()", {expr = true})
vim.api.nvim_set_keymap("s", "<Tab>", "v:lua.tab_complete()", {expr = true})


-- set the path to the sumneko installation; if you previously installed via the now deprecated :LspInstall, use
local sumneko_root_path = vim.fn.stdpath('cache')..'/lspconfig/sumneko_lua/lua-language-server'
local sumneko_binary = "lua-language-server"

local runtime_path = vim.split(package.path, ';')
table.insert(runtime_path, "lua/?.lua")
table.insert(runtime_path, "lua/?/init.lua")

require'lspconfig'.sumneko_lua.setup {
    cmd = {sumneko_binary, "-E", sumneko_root_path .. "/main.lua"};
    settings = {
        Lua = {
            runtime = {
                version = 'LuaJIT',
                path = runtime_path,
            },
            diagnostics = {
                globals = {'vim'},
            },
            workspace = {
                library = vim.api.nvim_get_runtime_file("", true),
                preloadFileSize = 120
            },
            telemetry = {
                enable = false,
            },
        },
    },
}