feat(nvim): add copilot-cmp

modules/programs/nvim/plugins/coding.nix

@@ -89,6 +89,23 @@ with builtins;
         { plugin = friendly-snippets; }
         { plugin = lspkind-nvim; }
         { plugin = luasnip; }
+        {
+          plugin = copilot-cmp;
+          opts = { };
+          dependencies = [
+            {
+              plugin = copilot-lua;
+              opts = {
+                suggestion = { enabled = false; };
+                panel = { enabled = false; };
+              };
+              conf = /* lua */ ''
+                require("copilot").setup(opts)
+                vim.cmd("Copilot disable")
+              '';
+            }
+          ];
+        }
       ];
     }
     {

modules/programs/nvim/plugins/lua/nvim-cmp.lua

@@ -2,13 +2,23 @@ local cmp = require("cmp")
 local luasnip = require("luasnip")
 require("luasnip.loaders.from_vscode").lazy_load()
 
+local has_words_before = function()
+  if vim.api.nvim_buf_get_option(0, "buftype") == "prompt" then
+    return false
+  end
+  local line, col = unpack(vim.api.nvim_win_get_cursor(0))
+  return col ~= 0 and vim.api.nvim_buf_get_text(0, line - 1, 0, line - 1, col, {})[1]:match("^%s*$") == nil
+end
+
 cmp.setup({
   formatting = {
     format = require("lspkind").cmp_format({
       mode = "symbol", -- show only symbol annotations
       maxwidth = 50, -- prevent the popup from showing more than provided characters
       ellipsis_char = "...", -- when popup menu exceed maxwidth, the truncated part would show ellipsis_char instead
-      symbol_map = {},
+      symbol_map = {
+        Copilot = "",
+      },
     }),
   },
   snippet = {
@@ -24,8 +34,8 @@ cmp.setup({
     ["<C-e>"] = cmp.mapping.abort(),
     ["<CR>"] = cmp.mapping.confirm({ select = true }),
     ["<Tab>"] = cmp.mapping(function(fallback)
-      if cmp.visible() then
-        cmp.select_next_item()
+      if cmp.visible() and has_words_before() then
+        cmp.select_next_item({ behavior = cmp.SelectBehavior.Select })
       elseif luasnip.expand_or_jumpable() then
         luasnip.expand_or_jump()
       else
@@ -46,6 +56,7 @@ cmp.setup({
     { name = "async_path", priority = 1 },
     { name = "buffer", priority = 1 },
     { name = "luasnip", priority = 2 },
+    { name = "copilot", group_index = 3 },
     { name = "nvim_lsp", priority = 4 },
   },
 })