Neovim for Minimalists — LSP and Completion

Configure LSP and completion.

Neovim for Minimalists — LSP and Completion

In this article, we will continue to set up LSP and completion for our minimal configuration.

This article is part of the Neovim for Minimalists series.

The Neovim configuration files can be found in this repository.

For the most recent version that uses mason.nvim, check out the main branch.

LSP Setup

Installation

We will still use the nvim-lspconfig and nvim-lsp-installer plugins to configure the LSP servers.

Note: For mason.nvim, check out the main branch.

In the init.lua file, we add the code to install the plugins.

use({
  "neovim/nvim-lspconfig",
  event = "BufReadPre",
  requires = { "williamboman/nvim-lsp-installer" },
  config = function()
    require("config.lsp")
  end,
})

Configuration

In the lua/lsp.lua file, we configure the LSP.

• We automate the installation of the language servers (line 176 — line 186).
• We use a Lua table to specify the language servers and their configurations (line 5 — line 28). We only configure Python (pyright) and Lua language servers (sumneko_lua).
• In the on_attach function (line 145 — line 160), we configure omni completion (:h omnifunc), completion function (:h completefunc), format expression (:h formatexpr), and tag function (:h tagfunc).

For beginners, check out the Beginners series for more details.

• The keymappings function (line 32 — line 49) configures several basic LSP key bindings.
• The highlighting function (line 51 — line 69) configures the document highlighting feature if it is supported by the language server.
• The formatting function (line 121 — line 143) set up auto code formatting if it is supported by the…