install mason, lsp, cmp

.config/nvim/lua/plugins.lua

@@ -42,6 +42,72 @@ return require('packer').startup(function(use)
     'kana/vim-textobj-line',
   }
 
+  use {
+    'williamboman/mason.nvim',
+    requires = {
+      'williamboman/mason-lspconfig.nvim',
+      'neovim/nvim-lspconfig',
+    },
+    run = ':MasonUpdate',
+    config = function()
+      require('mason').setup()
+      require('mason-lspconfig').setup()
+      local capabilities = require('cmp_nvim_lsp').default_capabilities()
+      require("mason-lspconfig").setup_handlers({
+        function (server_name) -- default handler
+          require("lspconfig")[server_name].setup({
+            capabilities = capabilities
+          })
+        end,
+        -- Next, you can provide a dedicated handler for specific servers.
+        -- For example, a handler override for the `rust_analyzer`:
+        -- ["rust_analyzer"] = function ()
+        --   require("rust-tools").setup {}
+        -- end
+      })
+    end
+  }
+
+  use {
+    'hrsh7th/nvim-cmp',
+    requires = {
+      'hrsh7th/cmp-nvim-lsp',
+      'hrsh7th/cmp-buffer',
+      'hrsh7th/cmp-path',
+      'hrsh7th/cmp-cmdline',
+    },
+    config = function()
+      local cmp = require('cmp')
+
+      cmp.setup({
+        mapping = cmp.mapping.preset.insert({}),
+        sources = cmp.config.sources({
+          { name = 'nvim_lsp' },
+        }, {
+            { name = 'buffer' },
+          })
+      })
+      
+      -- Use buffer source for `/` and `?` (if you enabled `native_menu`, this won't work anymore).
+      cmp.setup.cmdline({ '/', '?' }, {
+        mapping = cmp.mapping.preset.cmdline(),
+        sources = {
+          { name = 'buffer' }
+        }
+      })
+
+      -- Use cmdline & path source for ':' (if you enabled `native_menu`, this won't work anymore).
+      cmp.setup.cmdline(':', {
+        mapping = cmp.mapping.preset.cmdline(),
+        sources = cmp.config.sources({
+          { name = 'path' }
+        }, {
+            { name = 'cmdline' }
+          })
+      })
+    end
+  }
+
   use 'sheerun/vim-polyglot'
   use {
     'nvim-treesitter/nvim-treesitter',
@@ -77,6 +143,14 @@ return require('packer').startup(function(use)
 
   use 'preservim/nerdtree'
 
+  use {
+    'elixir-tools/elixir-tools.nvim',
+    requires = { 'nvim-lua/plenary.nvim' },
+    config = function()
+      require('elixir').setup()
+    end
+  }
+
   use { 'dracula/vim', as = 'dracula' }
 
   -- Automatically set up your configuration after cloning packer.nvim