improving startup time by using lazy loading or filetype loading

lua/custom/plugins/cmp.lua

@@ -11,35 +11,45 @@ return {
 
     -- Adds a number of user-friendly snippets
     'rafamadriz/friendly-snippets',
+
+    -- Optional sources
+    'hrsh7th/cmp-path',
+    'hrsh7th/cmp-buffer',
   },
+  event = { 'InsertEnter', 'CmdlineEnter' },
   config = function()
-    -- See `:help cmp`
+    -- Set completion options
     vim.opt.completeopt = { 'menu', 'menuone', 'noselect' }
+
+    -- Lazy load snippets from friendly-snippets
     require('luasnip.loaders.from_vscode').lazy_load()
 
-    local cmp = require 'cmp'
-    local luasnip = require 'luasnip'
-    luasnip.config.setup {}
+    -- Import required modules
+    local cmp = require('cmp')
+    local luasnip = require('luasnip')
 
-    local select_opts = { behavior = cmp.SelectBehavior.Select }
+    -- Setup luasnip
+    luasnip.config.setup({})
 
-    cmp.setup {
+    -- Setup nvim-cmp
+    cmp.setup({
       snippet = {
         expand = function(args)
           luasnip.lsp_expand(args.body)
         end,
       },
-      sources = {
+      sources = cmp.config.sources({
+        { name = 'nvim_lsp' },
+        { name = 'luasnip' },
+        { name = 'buffer' },
         { name = 'path' },
-        { name = 'nvim_lsp', keyword_length = 1 },
-        { name = 'buffer',   keyword_length = 3 },
-        { name = 'luasnip',  keyword_length = 2 },
-      },
+      }),
       window = {
-        documentation = cmp.config.window.bordered()
+        completion = cmp.config.window.bordered(),
+        documentation = cmp.config.window.bordered(),
       },
       formatting = {
-        fields = { 'menu', 'abbr', 'kind' },
+        fields = { 'abbr', 'kind', 'menu' },
         format = function(entry, item)
           local menu_icon = {
             nvim_lsp = 'λ',
@@ -47,72 +57,52 @@ return {
             buffer = 'Ω',
             path = '🖫',
           }
-
-          item.menu = menu_icon[entry.source.name]
+          item.menu = menu_icon[entry.source.name] or entry.source.name
           return item
         end,
       },
-      mapping = cmp.mapping.preset.insert {
+      mapping = cmp.mapping.preset.insert({
         ['<C-n>'] = cmp.mapping.select_next_item(),
         ['<C-p>'] = cmp.mapping.select_prev_item(),
         ['<C-b>'] = cmp.mapping.scroll_docs(-4),
         ['<C-f>'] = cmp.mapping.scroll_docs(4),
-        ['<C-Space>'] = cmp.mapping.complete {},
-        ['<CR>'] = cmp.mapping.confirm {
-          behavior = cmp.ConfirmBehavior.Replace,
-          select = true,
-        },
-        ['<Tab>'] = cmp.mapping(function(fallback)
+        ['<C-Space>'] = cmp.mapping.complete(),
+        ['<CR>'] = cmp.mapping.confirm({ select = true }),
+        ['<C-l>'] = cmp.mapping(function(fallback)
           if cmp.visible() then
             cmp.select_next_item()
-          elseif luasnip.expand_or_locally_jumpable() then
+          elseif luasnip.expand_or_jumpable() then
             luasnip.expand_or_jump()
           else
             fallback()
           end
         end, { 'i', 's' }),
-        ['<S-Tab>'] = cmp.mapping(function(fallback)
+        ['<C-h>'] = cmp.mapping(function(fallback)
           if cmp.visible() then
             cmp.select_prev_item()
-          elseif luasnip.locally_jumpable(-1) then
+          elseif luasnip.jumpable(-1) then
             luasnip.jump(-1)
           else
             fallback()
           end
         end, { 'i', 's' }),
-      },
-    }
-
-    local sign = function(opts)
-      vim.fn.sign_define(opts.name, {
-        texthl = opts.name,
-        text = opts.text,
-        numhl = ''
-      })
-    end
-
-    sign({ name = 'DiagnosticSignError', text = '✘' })
-    sign({ name = 'DiagnosticSignWarn', text = '▲' })
-    sign({ name = 'DiagnosticSignHint', text = '⚑' })
-    sign({ name = 'DiagnosticSignInfo', text = '»' })
-
-    vim.diagnostic.config({
-      virtual_text = false,
-      severity_sort = true,
-      float = {
-        border = 'rounded',
-        source = 'always',
-      },
+        ['<C-e>'] = cmp.mapping.abort(),
+      }),
     })
 
-    vim.lsp.handlers['textDocument/hover'] = vim.lsp.with(
-      vim.lsp.handlers.hover,
-      { border = 'rounded' }
-    )
+    -- Additional luasnip configuration
+    luasnip.config.set_config({
+      history = true,
+      updateevents = 'TextChanged,TextChangedI',
+    })
 
-    vim.lsp.handlers['textDocument/signatureHelp'] = vim.lsp.with(
-      vim.lsp.handlers.signature_help,
-      { border = 'rounded' }
-    )
+    -- Setup for SQL filetype with vim-dadbod-completion
+    cmp.setup.filetype('sql', {
+      sources = cmp.config.sources({
+        { name = 'vim-dadbod-completion' },
+        { name = 'buffer' },
+      }),
+    })
   end,
 }
+