Set up copilot integration

nix/home/programs/nvim/default.nix

@@ -29,6 +29,28 @@ let
       sha256 = "0i0p21jkrx99n3dnm5xvnw8n963c67l4lgl4iwngz0psdzwxphkw";
     };
   };
+
+  copilot-lua = pkgs.vimUtils.buildVimPlugin {
+    name = "copilot.lua";
+    version = "2022-05-28";
+    src = pkgs.fetchFromGitHub {
+      owner = "zbirenbaum";
+      repo = "copilot.lua";
+      rev = "77e3a4907928f0813024e573b882dc879dfc0c6b";
+      sha256 = "sha256-jBTS8MeN7Ydf0ZY7JWbrxaGo/GeDoEClfULiJVfN8Wo";
+    };
+  };
+
+  copilot-cmp = pkgs.vimUtils.buildVimPlugin {
+    name = "copilot-cmp";
+    version = "2022-05-11";
+    src = pkgs.fetchFromGitHub {
+      owner = "zbirenbaum";
+      repo = "copilot-cmp";
+      rev = "c2cdb3c0f5078b0619055af192295830a7987790";
+      sha256 = "sha256-+MzEGnhlrYRvAfskOwmw69OC1CsPXt7s3z+xPe9XPqs";
+    };
+  };
 in
 with builtins;
 {
@@ -104,14 +126,6 @@ with builtins;
       }
       undotree
       vim-goyo
-      {
-        plugin = nvim-cmp;
-        config = ''
-          lua << EOF
-          ${ readFile (./nvim-cmp.lua) }
-          EOF
-        '';
-      }
       luasnip
       cmp-nvim-lsp
       {
@@ -139,6 +153,39 @@ with builtins;
           nnoremap <leader>fh <cmd>lua require('telescope.builtin').help_tags()<cr>
         '';
       }
+      {
+        plugin = copilot-lua;
+        config = ''
+          lua << EOF
+            vim.defer_fn(function()
+              require('copilot').setup({
+                -- Disable these features because we're also using copilot-cmp
+                suggestion = { enabled = false },
+                panel = { enabled = false },
+                copilot_node_command = '${pkgs.nodejs-18_x}/bin/node',
+            })
+            end, 100)
+          EOF
+        '';
+      }
+      {
+        plugin = copilot-cmp;
+        config = ''
+          lua << EOF
+            require('copilot_cmp').setup({})
+          EOF
+        '';
+      }
+      # have the completion plugin get loaded last just in case anything above
+      # needs to do setup work before completions get set up.
+      {
+        plugin = nvim-cmp;
+        config = ''
+          lua << EOF
+          ${ readFile (./nvim-cmp.lua) }
+          EOF
+        '';
+      }
     ];
 
     extraConfig = readFile ./init.vim;