separated plugins configs and added couple new plugins

lua/custom/plugins/cmp.lua

@@ -0,0 +1,118 @@
+return {
+  -- Autocompletion
+  'hrsh7th/nvim-cmp',
+  dependencies = {
+    -- Snippet Engine & its associated nvim-cmp source
+    'L3MON4D3/LuaSnip',
+    'saadparwaiz1/cmp_luasnip',
+
+    -- Adds LSP completion capabilities
+    'hrsh7th/cmp-nvim-lsp',
+
+    -- Adds a number of user-friendly snippets
+    'rafamadriz/friendly-snippets',
+  },
+  config = function()
+    -- See `:help cmp`
+    vim.opt.completeopt = { 'menu', 'menuone', 'noselect' }
+    require('luasnip.loaders.from_vscode').lazy_load()
+
+    local cmp = require 'cmp'
+    local luasnip = require 'luasnip'
+    luasnip.config.setup {}
+
+    local select_opts = { behavior = cmp.SelectBehavior.Select }
+
+    cmp.setup {
+      snippet = {
+        expand = function(args)
+          luasnip.lsp_expand(args.body)
+        end,
+      },
+      sources = {
+        { name = 'path' },
+        { name = 'nvim_lsp', keyword_length = 1 },
+        { name = 'buffer',   keyword_length = 3 },
+        { name = 'luasnip',  keyword_length = 2 },
+      },
+      window = {
+        documentation = cmp.config.window.bordered()
+      },
+      formatting = {
+        fields = { 'menu', 'abbr', 'kind' },
+        format = function(entry, item)
+          local menu_icon = {
+            nvim_lsp = 'λ',
+            luasnip = '⋗',
+            buffer = 'Ω',
+            path = '🖫',
+          }
+
+          item.menu = menu_icon[entry.source.name]
+          return item
+        end,
+      },
+      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)
+          if cmp.visible() then
+            cmp.select_next_item()
+          elseif luasnip.expand_or_locally_jumpable() then
+            luasnip.expand_or_jump()
+          else
+            fallback()
+          end
+        end, { 'i', 's' }),
+        ['<S-Tab>'] = cmp.mapping(function(fallback)
+          if cmp.visible() then
+            cmp.select_prev_item()
+          elseif luasnip.locally_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',
+      },
+    })
+
+    vim.lsp.handlers['textDocument/hover'] = vim.lsp.with(
+      vim.lsp.handlers.hover,
+      { border = 'rounded' }
+    )
+
+    vim.lsp.handlers['textDocument/signatureHelp'] = vim.lsp.with(
+      vim.lsp.handlers.signature_help,
+      { border = 'rounded' }
+    )
+  end,
+}