Install vim cmp

lua/plugins/cmp.lua

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+-- I've set up a comprehensive completion system using nvim-cmp with the following features:
+--
+-- 1. Main Completion Sources:
+--    - LSP completions (cmp-nvim-lsp)
+--    - Snippets (LuaSnip + friendly-snippets)
+--    - Buffer words (cmp-buffer)
+--    - File paths (cmp-path)
+--    - Command line completions (cmp-cmdline)
+--
+-- 2. Key Mappings:
+--    - `<C-n>/<C-p>` - Navigate through completion items
+--    - `<C-b>/<C-f>` - Scroll documentation
+--    - `<C-Space>` - Trigger completion
+--    - `<C-e>` - Close completion window
+--    - `<CR>` - Confirm selection
+--    - `<S-CR>` - Confirm with replacement
+--    - `<Tab>/<S-Tab>` - Navigate completion items or snippets
+--
+-- 3. Features:
+--    - Ghost text preview
+--    - Icons for different completion types
+--    - Source indicators ([LSP], [Buffer], etc.)
+--    - Command-line completion for / ? :
+--    - Snippet support with friendly-snippets included
+--
+-- The configuration is optimized for performance by:
+-- - Loading on InsertEnter
+-- - Using the latest versions of plugins
+-- - Proper lazy loading of snippets
+
+return {
+  {
+    "hrsh7th/nvim-cmp",
+    version = false, -- last release is way too old
+    event = "InsertEnter",
+    dependencies = {
+      "hrsh7th/cmp-nvim-lsp", -- LSP source for nvim-cmp
+      "hrsh7th/cmp-buffer", -- Buffer completions
+      "hrsh7th/cmp-path", -- Path completions
+      "hrsh7th/cmp-cmdline", -- Cmdline completions
+      "saadparwaiz1/cmp_luasnip", -- Snippet completions
+      {
+        "L3MON4D3/LuaSnip",
+        version = "v2.*",
+        build = "make install_jsregexp",
+        dependencies = {
+          "rafamadriz/friendly-snippets", -- Preconfigured snippets
+        },
+      },
+    },
+    config = function()
+      local cmp = require("cmp")
+      local luasnip = require("luasnip")
+
+      -- Load friendly-snippets
+      require("luasnip.loaders.from_vscode").lazy_load()
+
+      cmp.setup({
+        snippet = {
+          expand = function(args)
+            luasnip.lsp_expand(args.body)
+          end,
+        },
+        completion = {
+          completeopt = "menu,menuone,noinsert",
+        },
+        mapping = cmp.mapping.preset.insert({
+          ["<C-n>"] = cmp.mapping.select_next_item({ behavior = cmp.SelectBehavior.Insert }),
+          ["<C-p>"] = cmp.mapping.select_prev_item({ behavior = cmp.SelectBehavior.Insert }),
+          ["<C-b>"] = cmp.mapping.scroll_docs(-4),
+          ["<C-f>"] = cmp.mapping.scroll_docs(4),
+          ["<C-Space>"] = cmp.mapping.complete(),
+          ["<C-e>"] = cmp.mapping.abort(),
+          ["<CR>"] = cmp.mapping.confirm({ select = true }), -- Accept currently selected item. Set `select` to `false` to only confirm explicitly selected items.
+          ["<S-CR>"] = cmp.mapping.confirm({
+            behavior = cmp.ConfirmBehavior.Replace,
+            select = true,
+          }), -- Accept currently selected item. Set `select` to `false` to only confirm explicitly selected items.
+          ["<Tab>"] = cmp.mapping(function(fallback)
+            if cmp.visible() then
+              cmp.select_next_item()
+            elseif luasnip.expand_or_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.jumpable(-1) then
+              luasnip.jump(-1)
+            else
+              fallback()
+            end
+          end, { "i", "s" }),
+        }),
+        sources = cmp.config.sources({
+          { name = "nvim_lsp" },
+          { name = "luasnip" },
+          { name = "buffer" },
+          { name = "path" },
+        }),
+        formatting = {
+          format = function(entry, vim_item)
+            -- Kind icons
+            vim_item.kind = string.format('%s %s', require("user.icons").kinds[vim_item.kind], vim_item.kind)
+            -- Source
+            vim_item.menu = ({
+              buffer = "[Buffer]",
+              nvim_lsp = "[LSP]",
+              luasnip = "[Snippet]",
+              path = "[Path]",
+            })[entry.source.name]
+            return vim_item
+          end
+        },
+        experimental = {
+          ghost_text = true,
+        },
+      })
+
+      -- 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,
+  },
+}
+

lua/user/icons.lua

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+return {
+  kinds = {
+    Text = "󰉿",
+    Method = "󰆧",
+    Function = "󰊕",
+    Constructor = "",
+    Field = "󰜢",
+    Variable = "󰀫",
+    Class = "󰠱",
+    Interface = "",
+    Module = "",
+    Property = "󰜢",
+    Unit = "󰑭",
+    Value = "󰎠",
+    Enum = "",
+    Keyword = "󰌋",
+    Snippet = "",
+    Color = "󰏘",
+    File = "󰈙",
+    Reference = "󰈇",
+    Folder = "󰉋",
+    EnumMember = "",
+    Constant = "󰏿",
+    Struct = "󰙅",
+    Event = "",
+    Operator = "󰆕",
+    TypeParameter = "",
+  },
+}
+