neovim config for elixir development

init.lua

-- set your leader and local leader key
-- make sure to set `mapleader` and `maplocalleader` before lazy so your mappings are correct
vim.g.mapleader = " " -- using space as leader key
vim.g.maplocalleader = "," -- using comma as local leader

-- bootstrap lazy.nvim plugin manager
local lazypath = vim.fn.stdpath("data") .. "/lazy/lazy.nvim"
if not (vim.uv or vim.loop).fs_stat(lazypath) then
  vim.fn.system({
    "git",
    "clone",
    "--filter=blob:none",
    "https://github.com/folke/lazy.nvim.git",
    "--branch=stable",
    lazypath,
  })
end
vim.opt.rtp:prepend(lazypath)

require("lazy").setup({
  {
    "neovim/nvim-lspconfig",
    config = function()
      local lspconfig = require("lspconfig")
      local capabilities = require("cmp_nvim_lsp").default_capabilities()
      lspconfig.elixirls.setup({
        -- you need to specify the executable command mannualy for elixir-ls
        cmd = { "elixir-ls" },
        capabilities = capabilities,
      })
    end,
  },
  {
    "nvim-treesitter/nvim-treesitter",
    config = function()
      require("nvim-treesitter.configs").setup({
        ensure_installed = { "elixir", "eex", "heex" },
        highlight = { enable = true },
        indent = { enable = true },
      })
    end,
  },
  {
    "hrsh7th/nvim-cmp",
    dependencies = {
      -- install different completion source
      "hrsh7th/cmp-nvim-lsp",
      "hrsh7th/cmp-buffer",
      "hrsh7th/cmp-path",
    },
    config = function()
      local cmp = require("cmp")
      cmp.setup({
        -- add different completion source
        sources = cmp.config.sources({
          { name = "nvim_lsp" },
          { name = "buffer" },
          { name = "path" },
        }),
        -- using default mapping preset
        mapping = cmp.mapping.preset.insert({
          ["<C-Space>"] = cmp.mapping.complete(),
          ["<CR>"] = cmp.mapping.confirm({ select = true }),
        }),
        snippet = {
          -- you must specify a snippet engine
          expand = function(args)
            -- using neovim v0.10 native snippet feature
            -- you can also use other snippet engines
            vim.snippet.expand(args.body)
          end,
        },
      })
    end,
  },
})